1 Changes in version 0.4.7.14 - 2023-07-26
2 This version contains several minor fixes and one major bugfix affecting
3 vanguards (onion service). As usual, we recommend upgrading to this version
6 o Major bugfixes (vanguards):
7 - Rotate to a new L2 vanguard whenever an existing one loses the
8 Stable or Fast flag. Previously, we would leave these relays in
9 the L2 vanguard list but never use them, and if all of our
10 vanguards end up like this we wouldn't have any middle nodes left
11 to choose from so we would fail to make onion-related circuits.
12 Fixes bug 40805; bugfix on 0.4.7.1-alpha.
15 - Update CI to use Debian Bullseye for runners.
17 o Minor feature (lzma):
18 - Fix compiler warnings for liblzma >= 5.3.1. Closes ticket 40741.
20 o Minor features (directory authorities):
21 - Directory authorities now include their AuthDirMaxServersPerAddr
22 config option in the consensus parameter section of their vote.
23 Now external tools can better predict how they will behave.
24 Implements ticket 40753.
26 o Minor features (fallbackdir):
27 - Regenerate fallback directories generated on July 26, 2023.
29 o Minor features (geoip data):
30 - Update the geoip files to match the IPFire Location Database, as
31 retrieved on 2023/07/26.
33 o Minor bugfix (relay, logging):
34 - The wrong max queue cell size was used in a protocol warning
35 logging statement. Fixes bug 40745; bugfix on 0.4.7.1-alpha.
37 o Minor bugfixes (compilation):
38 - Fix all -Werror=enum-int-mismatch warnings. No behavior change.
39 Fixes bug 40824; bugfix on 0.3.5.1-alpha.
41 o Minor bugfixes (metrics):
42 - Decrement hs_intro_established_count on introduction circuit
43 close. Fixes bug 40751; bugfix on 0.4.7.12.
45 o Minor bugfixes (sandbox):
46 - Allow membarrier for the sandbox. And allow rt_sigprocmask when
47 compiled with LTTng. Fixes bug 40799; bugfix on 0.3.5.1-alpha.
50 Changes in version 0.4.7.13 - 2023-01-12
51 This version contains three major bugfixes, two for relays and one for
52 client being a security fix, TROVE-2022-002. We have added, for Linux, the
53 support for IP_BIND_ADDRESS_NO_PORT for relays using OutboundBindAddress.
54 We strongly recommend to upgrade to this version considering the important
55 congestion control fix detailed below.
57 o Major bugfixes (congestion control):
58 - Avoid incrementing the congestion window when the window is not
59 fully in use. Thia prevents overshoot in cases where long periods
60 of low activity would allow our congestion window to grow, and
61 then get followed by a burst, which would cause queue overload.
62 Also improve the increment checks for RFC3742. Fixes bug 40732;
63 bugfix on 0.4.7.5-alpha.
65 o Major bugfixes (relay):
66 - When opening a channel because of a circuit request that did not
67 include an Ed25519 identity, record the Ed25519 identity that we
68 actually received, so that we can use the channel for other
69 circuit requests that _do_ list an Ed25519 identity. (Previously
70 we had code to record this identity, but a logic bug caused it to
71 be disabled.) Fixes bug 40563; bugfix on 0.3.0.1-alpha. Patch
74 o Major bugfixes (TROVE-2022-002, client):
75 - The SafeSocks option had its logic inverted for SOCKS4 and
76 SOCKS4a. It would let the unsafe SOCKS4 pass but not the safe
77 SOCKS4a one. This is TROVE-2022-002 which was reported on
78 Hackerone by "cojabo". Fixes bug 40730; bugfix on 0.3.5.1-alpha.
80 o Minor feature (authority):
81 - Reject 0.4.6.x series at the authority level. Closes ticket 40664.
83 o Minor features (fallbackdir):
84 - Regenerate fallback directories generated on January 12, 2023.
86 o Minor features (geoip data):
87 - Update the geoip files to match the IPFire Location Database, as
88 retrieved on 2023/01/12.
90 o Minor features (relays):
91 - Set the Linux-specific IP_BIND_ADDRESS_NO_PORT option on outgoing
92 sockets, allowing relays using OutboundBindAddress to make more
93 outgoing connections than ephemeral ports, as long as they are to
94 separate destinations. Related to issue 40597; patch by Alex
97 o Minor bugfixes (relay, metrics):
98 - Fix typo in a congestion control label on the MetricsPort. Fixes
99 bug 40727; bugfix on 0.4.7.12.
101 o Minor bugfixes (sandbox, authority):
102 - With the sandbox enabled, allow to write "my-consensus-
103 {ns|microdesc}" and to rename them as well. Fixes bug 40729;
104 bugfix on 0.3.5.1-alpha.
106 o Code simplifications and refactoring:
107 - Rely on actual error returned by the kernel when choosing what
108 resource exhaustion to log. Fixes issue 40613; Fix
109 on tor-0.4.6.1-alpha.
112 Changes in version 0.4.7.12 - 2022-12-06
113 This version contains a major change that is a new key for moria1. Also, new
114 metrics are exported on the MetricsPort for the congestion control
117 o Directory authority changes (moria1):
118 - Rotate the relay identity key and v3 identity key for moria1. They
119 have been online for more than a decade and refreshing keys
120 periodically is good practice. Advertise new ports too, to avoid
121 confusion. Closes ticket 40722.
123 o Minor feature (Congestion control metrics):
124 - Add additional metricsport relay metrics for congestion control.
127 o Minor features (fallbackdir):
128 - Regenerate fallback directories generated on December 06, 2022.
130 o Minor features (geoip data):
131 - Update the geoip files to match the IPFire Location Database, as
132 retrieved on 2022/12/06.
134 o Minor bugfixes (cpuworker, relay):
135 - Fix an off by one overload calculation on the number of CPUs being
136 used by our thread pool. Fixes bug 40719; bugfix on 0.3.5.1-alpha.
139 Changes in version 0.4.7.11 - 2022-11-10
140 This version contains several major fixes aimed at helping defend against
141 network denial of service. It is also extending drastically the MetricsPort
142 for relays to help us gather more internal data to investigate performance
145 We strongly recommend to upgrade to this version especially for Exit relays
146 in order to help the network defend against this ongoing DDoS.
148 o Directory authority changes (dizum, Faravahar):
149 - Change dizum IP address. Closes ticket 40687.
150 - Remove Faravahar until its operator, Sina, set it back up online
151 outside of Team Cymru network. Closes ticket 40688.
153 o Major bugfixes (geoip data):
154 - IPFire informed us on August 12th that databases generated after
155 (including) August 10th did not have proper ARIN network
156 allocations. We are updating the database to use the one generated
157 on August 9th, 2022. Fixes bug 40658; bugfix on 0.4.5.13.
159 o Major bugfixes (onion service):
160 - Set a much higher circuit build timeout for opened client rendezvous
161 circuit. Before this, tor would time them out very quickly leading to
162 unnecessary retries meaning more load on the network. Fixes bug 40694;
163 bugfix on 0.3.5.1-alpha.
165 o Major bugfixes (OSX):
166 - Fix coarse-time computation on Apple platforms (like Mac M1) where
167 the Mach absolute time ticks do not correspond directly to
168 nanoseconds. Previously, we computed our shift value wrong, which
169 led us to give incorrect timing results. Fixes bug 40684; bugfix
172 o Major bugfixes (relay):
173 - Improve security of our DNS cache by randomly clipping the TTL
174 value. TROVE-2021-009. Fixes bug 40674; bugfix on 0.3.5.1-alpha.
176 o Minor feature (Mac and iOS build):
177 - Change how combine_libs works on Darwin like platforms to make
178 sure we don't include any `__.SYMDEF` and `__.SYMDEF SORTED`
179 symbols on the archive before we repack and run ${RANLIB} on the
180 archive. This fixes a build issue with recent Xcode versions on
181 Mac Silicon and iOS. Closes ticket 40683.
183 o Minor feature (metrics):
184 - Add various congestion control counters to the MetricsPort. Closes
187 o Minor feature (performance):
188 - Bump the maximum amount of CPU that can be used from 16 to 128. Note
189 that NumCPUs torrc option overrides this hardcoded maximum. Fixes bug
190 40703; bugfix on 0.3.5.1-alpha.
192 o Minor feature (relay):
193 - Make an hardcoded value for the maximum of per CPU tasks into a
195 - Two new consensus parameters are added to control the wait time in
196 queue of the onionskins. One of them is the torrc
197 MaxOnionQueueDelay options which supersedes the consensus
198 parameter. Closes ticket 40704.
200 o Minor feature (relay, DoS):
201 - Apply circuit creation anti-DoS defenses if the outbound circuit
202 max cell queue size is reached too many times. This introduces two
203 new consensus parameters to control the queue size limit and
204 number of times allowed to go over that limit. Closes ticket 40680.
206 o Minor feature (relay, metrics):
207 - Add DoS defenses counter to MetricsPort.
208 - Add congestion control RTT reset counter to MetricsPort.
209 - Add counters to the MetricsPort how many connections, per type,
210 are currently opened and how many were created.
211 - Add relay flags from the consensus to the MetricsPort.
212 - Add total number of opened circuits to MetricsPort.
213 - Add total number of streams seen by an Exit to the MetricsPort.
214 - Add traffic stats as in number of read/written bytes in total.
215 - Related to ticket 40194.
217 o Minor features (fallbackdir):
218 - Regenerate fallback directories generated on November 10, 2022.
220 o Minor features (geoip data):
221 - Update the geoip files to match the IPFire Location Database, as
222 retrieved on 2022/11/10.
224 o Minor bugfixes (authorities, sandbox):
225 - Allow to write file my-consensus-<flavor-name> to disk when
226 sandbox is activated. Fixes bug 40663; bugfix on 0.3.5.1-alpha.
228 o Minor bugfixes (dirauth):
229 - Directory authorities stop voting a consensus "Measured" weight
230 for relays with the Authority flag. Now these relays will be
231 considered unmeasured, which should reserve their bandwidth for
232 their dir auth role and minimize distractions from other roles. In
233 place of the "Measured" weight, they now include a
234 "MeasuredButAuthority" weight (not used by anything) so the
235 bandwidth authority's opinion on this relay can be recorded for
236 posterity. Lastly, remove the AuthDirDontVoteOnDirAuthBandwidth
237 torrc option which never worked right. Fixes bugs 40698 and 40700;
238 bugfix on 0.4.7.2-alpha.
240 o Minor bugfixes (onion service client):
241 - A collapsing onion service circuit should be seen as an
242 "unreachable" error so it can be retried. Fixes bug 40692; bugfix
245 o Minor bugfixes (onion service):
246 - Make the service retry a rendezvous if the circuit is being
247 repurposed for measurements. Fixes bug 40696; bugfix
250 o Minor bugfixes (relay overload statistics):
251 - Count total create cells vs dropped create cells properly, when
252 assessing if our fraction of dropped cells is too high. We only
253 count non-client circuits in the denominator, but we would include
254 client circuits in the numerator, leading to surprising log lines
255 claiming that we had dropped more than 100% of incoming create
256 cells. Fixes bug 40673; bugfix on 0.4.7.1-alpha.
258 o Code simplification and refactoring (bridges):
259 - Remove unused code related to ExtPort connection ID. Fixes bug
260 40648; bugfix on 0.3.5.1-alpha.
263 Changes in version 0.4.7.10 - 2022-08-12
264 This version updates the geoip cache that we generate from IPFire location
265 database to use the August 9th, 2022 one. Everyone MUST update to this
266 latest release else circuit path selection and relay metrics are badly
269 o Major bugfixes (geoip data):
270 - IPFire informed us on August 12th that databases generated after
271 (including) August 10th did not have proper ARIN network allocations. We
272 are updating the database to use the one generated on August 9th, 2022.
273 Fixes bug 40658; bugfix on 0.4.7.9.
276 Changes in version 0.4.7.9 - 2022-08-11
277 This version contains several major fixes aimed at reducing memory pressure on
278 relays and possible side-channel. It also contains a major bugfix related to
279 congestion control also aimed at reducing memory pressure on relays.
280 Finally, there is last one major bugfix related to Vanguard L2 layer node
283 We strongly recommend to upgrade to this version especially for Exit relays
284 in order to help the network defend against this ongoing DDoS.
286 o Major bugfixes (congestion control):
287 - Implement RFC3742 Limited Slow Start. Congestion control was
288 overshooting the congestion window during slow start, particularly
289 for onion service activity. With this fix, we now update the
290 congestion window more often during slow start, as well as dampen
291 the exponential growth when the congestion window grows above a
292 capping parameter. This should reduce the memory increases guard
293 relays were seeing, as well as allow us to set lower queue limits
294 to defend against ongoing DoS attacks. Fixes bug 40642; bugfix
297 o Major bugfixes (relay):
298 - Remove OR connections btrack subsystem entries when the connections
299 close normally. Before this, we would only remove the entry on error and
300 thus leaking memory for each normal OR connections. Fixes bug 40604;
301 bugfix on 0.4.0.1-alpha.
302 - Stop sending TRUNCATED cell and instead close the circuit from which we
303 received a DESTROY cell. This makes every relay in the circuit path to
304 stop queuing cells. Fixes bug 40623; bugfix on 0.1.0.2-rc.
306 o Major bugfixes (vanguards):
307 - We had omitted some checks for whether our vanguards (second layer
308 guards from proposal 333) overlapped. Now make sure to pick each
309 of them to be independent. Also, change the design to allow them
310 to come from the same family. Fixes bug 40639; bugfix
313 o Minor features (dirauth):
314 - Add a torrc option to control the Guard flag bandwidth threshold
315 percentile. Closes ticket 40652.
316 - Add an AuthDirVoteGuard torrc option that can allow authorities to
317 assign the Guard flag to the given fingerprints/country code/IPs.
318 This is a needed feature mostly for defense purposes in case a DoS
319 hits the network and relay start losing the Guard flags too fast.
320 - Make UPTIME_TO_GUARANTEE_STABLE, MTBF_TO_GUARANTEE_STABLE,
321 TIME_KNOWN_TO_GUARANTEE_FAMILIAR WFU_TO_GUARANTEE_GUARD tunable
324 o Minor features (fallbackdir):
325 - Regenerate fallback directories generated on August 11, 2022.
327 o Minor features (geoip data):
328 - Update the geoip files to match the IPFire Location Database, as
329 retrieved on 2022/08/11.
331 o Minor bugfixes (congestion control):
332 - Add a check for an integer underflow condition that might happen
333 in cases where the system clock is stopped, the ORconn is blocked,
334 and the endpoint sends more than a congestion window worth of non-
335 data control cells at once. This would cause a large congestion
336 window to be calculated instead of a small one. No security
337 impact. Fixes bug 40644; bugfix on 0.4.7.5-alpha.
339 o Minor bugfixes (defense in depth):
340 - Change a test in the netflow padding code to make it more
341 _obviously_ safe against remotely triggered crashes. (It was safe
342 against these before, but not obviously so.) Fixes bug 40645;
343 bugfix on 0.3.1.1-alpha.
345 o Minor bugfixes (relay):
346 - Do not propagate either forward or backward a DESTROY remote reason when
347 closing a circuit in order to avoid a possible side channel. Fixes bug
348 40649; bugfix on 0.1.2.4-alpha.
351 Changes in version 0.4.7.8 - 2022-06-17
352 This version fixes several bugfixes including a High severity security issue
353 categorized as a Denial of Service. Everyone running an earlier version
354 should upgrade to this version.
356 o Major bugfixes (congestion control, TROVE-2022-001):
357 - Fix a scenario where RTT estimation can become wedged, seriously
358 degrading congestion control performance on all circuits. This
359 impacts clients, onion services, and relays, and can be triggered
360 remotely by a malicious endpoint. Tracked as CVE-2022-33903. Fixes
361 bug 40626; bugfix on 0.4.7.5-alpha.
363 o Minor features (fallbackdir):
364 - Regenerate fallback directories generated on June 17, 2022.
366 o Minor features (geoip data):
367 - Update the geoip files to match the IPFire Location Database, as
368 retrieved on 2022/06/17.
370 o Minor bugfixes (linux seccomp2 sandbox):
371 - Allow the rseq system call in the sandbox. This solves a crash
372 issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
373 40601; bugfix on 0.3.5.11.
375 o Minor bugfixes (logging):
376 - Demote a harmless warn log message about finding a second hop to
377 from warn level to info level, if we do not have enough
378 descriptors yet. Leave it at notice level for other cases. Fixes
379 bug 40603; bugfix on 0.4.7.1-alpha.
380 - Demote a notice log message about "Unexpected path length" to info
381 level. These cases seem to happen arbitrarily, and we likely will
382 never find all of them before the switch to arti. Fixes bug 40612;
383 bugfix on 0.4.7.5-alpha.
385 o Minor bugfixes (relay, logging):
386 - Demote a harmless XOFF log message to from notice level to info
387 level. Fixes bug 40620; bugfix on 0.4.7.5-alpha.
390 Changes in version 0.4.7.7 - 2022-04-27
391 This is the first stable version of the 0.4.7.x series. This series includes
392 several major bugfixes from previous series and one massive new feature:
395 Congestion control should improve traffic speed and stability on the network
396 once a majority of Exit upgrade. You can find more details about it in
397 proposal 324 in the torspec.git repository.
399 For a complete list of changes since 0.4.6.10, see the ReleaseNotes file.
401 o Minor features (fallbackdir):
402 - Regenerate fallback directories generated on April 27, 2022.
404 o Minor features (geoip data):
405 - Update the geoip files to match the IPFire Location Database, as
406 retrieved on 2022/04/27.
408 o Minor bugfixes (congestion control, client side logs):
409 - Demote a warn about 1-hop circuits using congestion control down to
410 info; Demote the 4-hop case to notice. Fixes bug 40598; bugfix on
414 Changes in version 0.4.7.6-rc - 2022-04-07
415 This is the first release candidate of the 0.4.7.x series. Only one minor
416 bugfix went in since the last alpha couple weeks ago. We strongly recommend
417 anyone running an alpha version to upgrade to this version. Unless major
418 problems are found, the next release will finally be the stable!
420 o Minor features (fallbackdir):
421 - Regenerate fallback directories generated on April 07, 2022.
423 o Minor features (geoip data):
424 - Update the geoip files to match the IPFire Location Database, as
425 retrieved on 2022/04/07.
427 o Minor features (linux seccomp2 sandbox):
428 - Permit the clone3 syscall, which is apparently used in glibc-2.34
429 and later. Closes ticket 40590.
432 Changes in version 0.4.7.5-alpha - 2022-03-25
433 This version contains, of what we hope, the final work for congestion
434 control paving the way to the stable version. We expect this to be the last
435 alpha version of the 0.4.7.x series. Mostly minor bugfixes except one major
436 bugfix that changes how Tor behaves with DNS timeouts for Exit relays. As
437 always with an alpha, we recommend all relay operators to upgrade from
438 previous alpha to this one.
440 o Major bugfixes (onion service, congestion control):
441 - Fix the onion service upload case where the congestion control
442 parameters were not added to the right object. Fixes bug 40586;
443 bugfix on 0.4.7.4-alpha.
445 o Major bugfixes (relay, DNS):
446 - Lower the DNS timeout from 3 attempts at 5 seconds each to 2
447 attempts at 1 seconds each. Two new consensus parameters were
448 added to control these values. This change should improve observed
449 performance under DNS load; see ticket for more details. Fixes bug
450 40312; bugfix on 0.3.5.1-alpha.
452 o Minor features (control port):
453 - Provide congestion control fields on CIRC_BW and STREAM control
454 port events, for use by sbws. Closes ticket 40568.
456 o Minor features (fallbackdir):
457 - Regenerate fallback directories generated on March 25, 2022.
459 o Minor features (geoip data):
460 - Update the geoip files to match the IPFire Location Database, as
461 retrieved on 2022/03/25.
463 o Minor bugfixes (DNSPort, dormant mode):
464 - A request on the DNSPort now wakes up a dormant tor. Fixes bug
465 40577; bugfix on 0.3.5.1-alpha.
467 o Minor bugfixes (metrics port, onion service):
468 - Fix the metrics with a port label to be unique. Before this, all
469 ports of an onion service would be on the same line which violates
470 the Prometheus rules of unique labels. Fixes bug 40581; bugfix
473 o Minor bugfixes (onion service congestion control):
474 - Avoid a non-fatal assertion failure in the case where we fail to
475 set up congestion control on a rendezvous circuit. This could
476 happen naturally if a cache entry expired at an unexpected time.
477 Fixes bug 40576; bugfix on 0.4.7.4-alpha.
479 o Minor bugfixes (onion service, client):
480 - Fix a rare but fatal assertion failure due to a guard subsystem
481 recursion triggered by the onion service client. Fixes bug 40579;
482 bugfix on 0.3.5.1-alpha.
484 o Minor bugfixes (relay, overload):
485 - Decide whether to signal overload based on a fraction and
486 assessment period of ntor handshake drops. Previously, a single
487 drop could trigger an overload state, which caused many false
488 positives. Fixes bug 40560; bugfix on 0.4.7.1-alpha.
491 Changes in version 0.4.7.4-alpha - 2022-02-25
492 This version contains the negotiation congestion control work which is the
493 final part needed before going stable. There are also various bugfixes
494 including two major ones detailed below. Last, the Exit notice page layout
495 has been modernized but the text is unchanged. We recommend that all relay
496 operators running any previous alpha upgrade to this one.
498 o Major features (relay, client, onion services):
499 - Implement RTT-based congestion control for exits and onion
500 services, from Proposal 324. Disabled by default. Enabled by the
501 'cc_alg' consensus parameter. Closes ticket 40444.
503 o Major bugfixes (client):
504 - Stop caching TCP connect failures to relays/bridges when we
505 initiated the connection as a client. Now we only cache connect
506 failures as a relay or bridge when we initiated them because of an
507 EXTEND request. Declining to re-attempt the client-based
508 connections could cause problems when we lose connectivity and try
509 to reconnect. Fixes bug 40499; bugfix on 0.3.3.4-alpha.
511 o Major bugfixes (relay, overload):
512 - Do not trigger a general overload on DNS timeout. Even after
513 fixing 40527, some code remained that triggered the overload.
514 Fixes bug 40564; bugfix on 0.4.7.1-alpha.
516 o Minor feature (authority, relay):
517 - Reject End-Of-Life relays running version 0.3.5.x. Closes
520 o Minor features (fallbackdir):
521 - Regenerate fallback directories generated on February 25, 2022.
523 o Minor features (geoip data):
524 - Update the geoip files to match the IPFire Location Database, as
525 retrieved on 2022/02/25.
527 o Minor bugfix (logging):
528 - Update a log notice dead URL to a working one. Fixes bug 40544;
529 bugfix on 0.3.5.1-alpha.
531 o Minor bugfix (relay):
532 - Remove the HSDir and HSIntro onion service v2 protocol versions so
533 relay stop advertising that they support them. Fixes bug 40509;
536 o Minor bugfixes (cell scheduling):
537 - Avoid writing empty payload with NSS write.
538 - Don't attempt to write 0 bytes after a cell scheduling loop. No
539 empty payload was put on the wire. Fixes bug 40548; bugfix
542 o Minor bugfixes (compilation):
543 - Resume being able to build on old / esoteric gcc versions. Fixes
544 bug 40550; bugfix on 0.4.7.1-alpha.
546 o Minor bugfixes (compiler warnings):
547 - Fix couple compiler warnings on latest Ubuntu Jammy. Fixes bug
548 40516; bugfix on 0.3.5.1-alpha.
551 - Provide an improved version of the tor-exit-notice.html file for
552 exit relays to use as a landing page. The text is unchanged, but
553 the page design and layout are significantly modernized, and
554 several links are fixed. Patch from "n_user"; closes ticket 40529.
557 Changes in version 0.4.6.10 - 2022-02-04
558 This version contains minor bugfixes but one in particular is that relays
559 don't advertise onion service v2 support at the protocol version level.
561 o Minor features (fallbackdir):
562 - Regenerate fallback directories generated on February 04, 2022.
564 o Minor features (geoip data):
565 - Update the geoip files to match the IPFire Location Database, as
566 retrieved on 2022/02/04.
568 o Minor bugfix (logging):
569 - Update a log notice dead URL to a working one. Fixes bug 40544;
570 bugfix on 0.3.5.1-alpha.
572 o Minor bugfix (relay):
573 - Remove the HSDir and HSIntro onion service v2 protocol versions so
574 relay stop advertising that they support them. Fixes bug 40509;
577 o Minor bugfixes (MetricsPort, Prometheus):
578 - Add double quotes to the label values of the onion service
579 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
582 Changes in version 0.4.5.12 - 2022-02-04
583 This version contains mostly minor bugfixes for which you can find the
584 details below. The previous release (0.4.5.11) was suppose to update the
585 GeoIP and fallbackdir lists but a problem in our release pipeline prevented
586 those files to be updated correctly. Thus, this release regenerates up to
587 date lists. Furthermore, another fix to highlight is that relays don't
588 advertise onion service v2 support at the protocol version level.
590 o Minor feature (reproducible build):
591 - The repository can now build reproducible tarballs which adds the
592 build command "make dist-reprod" for that purpose. Closes
595 o Minor features (compilation):
596 - Give an error message if trying to build with a version of
597 LibreSSL known not to work with Tor. (There's an incompatibility
598 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
599 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
602 o Minor features (fallbackdir):
603 - Regenerate fallback directories generated on February 04, 2022.
605 o Minor features (geoip data):
606 - Update the geoip files to match the IPFire Location Database, as
607 retrieved on 2022/02/04.
609 o Minor bugfix (logging):
610 - Update a log notice dead URL to a working one. Fixes bug 40544;
611 bugfix on 0.3.5.1-alpha.
613 o Minor bugfix (relay):
614 - Remove the HSDir and HSIntro onion service v2 protocol versions so
615 relay stop advertising that they support them. Fixes bug 40509;
618 o Minor bugfixes (compilation):
619 - Fix a compilation error when trying to build Tor with a compiler
620 that does not support expanding statically initialized const
621 values in macro's. Fixes bug 40410; bugfix on 0.4.5.1-alpha
622 - Fix our configuration logic to detect whether we had OpenSSL 3:
623 previously, our logic was reversed. This has no other effect than
624 to change whether we suppress deprecated API warnings. Fixes bug
625 40429; bugfix on 0.3.5.13.
627 o Minor bugfixes (MetricsPort, Prometheus):
628 - Add double quotes to the label values of the onion service
629 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
631 o Minor bugfixes (relay):
632 - Reject IPv6-only DirPorts. Our reachability self-test forces
633 DirPorts to be IPv4, but our configuration parser allowed them to
634 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
635 bugfix on 0.4.5.1-alpha.
638 Changes in version 0.4.7.3-alpha - 2021-12-15
639 This third alpha release of the 0.4.7.x series fixes several bugs including
640 two major ones affecting Bridges and Relays (see below). If you are running
641 an earlier 0.4.7.x version, you should upgrade to this version.
643 o Major bugfixes (bridges):
644 - Make Tor work reliably again when you have multiple bridges
645 configured and one or more of them are unreachable. The problem
646 came because we require that we have bridge descriptors for both
647 of our first two bridges (else we refuse to try to connect), but
648 in some cases we would wait three hours before trying to fetch
649 these missing descriptors, and/or never recover when we do try to
650 fetch them. Fixes bugs 40396 and 40495; bugfix on 0.3.0.5-rc
653 o Major bugfixes (relay, overload):
654 - Change the MetricsPort DNS "timeout" label to be "tor_timeout" in
655 order to indicate that this was a DNS timeout from tor perspective
656 and not the DNS server itself.
657 - Deprecate overload_dns_timeout_period_secs and
658 overload_dns_timeout_scale_percent consensus parameters as well.
659 They were used to assess the overload state which is no more now.
660 - Don't make Tor DNS timeout trigger an overload general state.
661 These timeouts are different from DNS server timeout. They have to
662 be seen as timeout related to UX and not because of a network
663 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
665 o Minor feature (reproducible build):
666 - The repository can now build reproducible tarballs which adds the
667 build command "make dist-reprod" for that purpose. Closes
670 o Minor features (compilation):
671 - Give an error message if trying to build with a version of
672 LibreSSL known not to work with Tor. (There's an incompatibility
673 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
674 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
677 o Minor features (fallbackdir):
678 - Regenerate fallback directories generated on December 15, 2021.
680 o Minor features (geoip data):
681 - Update the geoip files to match the IPFire Location Database, as
682 retrieved on 2021/12/15.
684 o Minor features (portability):
685 - Try to prevent a compiler warning about printf arguments that
686 could sometimes occur on MSYS2 depending on the configuration.
689 o Minor bugfix (pluggable transport):
690 - Do not kill a managed proxy if one of its transport configurations
691 emits a method error. Instead log a warning and continue processing
692 method arguments. Fixes bug 7362; bugfix on 0.2.3.6-alpha.
694 o Minor bugfixes (bridges):
695 - When we don't yet have a descriptor for one of our bridges,
696 disable the entry guard retry schedule on that bridge. The entry
697 guard retry schedule and the bridge descriptor retry schedule can
698 conflict, e.g. where we mark a bridge as "maybe up" yet we don't
699 try to fetch its descriptor yet, leading Tor to wait (refusing to
700 do anything) until it becomes time to fetch the descriptor. Fixes
701 bug 40497; bugfix on 0.3.0.3-alpha.
703 o Minor bugfixes (compilation):
704 - Fix our configuration logic to detect whether we had OpenSSL 3:
705 previously, our logic was reversed. This has no other effect than
706 to change whether we suppress deprecated API warnings. Fixes bug
707 40429; bugfix on 0.3.5.13.
709 o Minor bugfixes (controller, path bias):
710 - When a circuit's path is specified, in full or in part, from the
711 controller API, do not count that circuit towards our path-bias
712 calculations. (Doing so was incorrect, since we cannot tell
713 whether the controller is selecting relays randomly.) Resolves a
714 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
716 o Minor bugfixes (logging):
717 - When we no longer have enough directory information to use the
718 network, we would log a notice-level message -- but we would not
719 reliably log a message when we recovered and resumed using the
720 network. Now make sure there is always a corresponding message
721 about recovering. Fixes bug 40496; bugfix on 0.3.5.1-alpha.
723 o Minor bugfixes (performance, DoS):
724 - Fix one case of a not-especially viable denial-of-service attack
725 found by OSS-Fuzz in our consensus-diff parsing code. This attack
726 causes a lot small of memory allocations and then immediately
727 frees them: this is only slow when running with all the sanitizers
728 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
730 o Minor bugfixes (relay):
731 - Reject IPv6-only DirPorts. Our reachability self-test forces
732 DirPorts to be IPv4, but our configuration parser allowed them to
733 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
734 bugfix on 0.4.5.1-alpha.
736 o Minor bugfixes (sandbox):
737 - Fix the sandbox on i386 by modifying it to allow the
738 "clock_gettime64" and "statx" system calls and to filter the
739 "chown32" and "stat64" system calls in place of "chown" and
740 "stat", respectively. Fixes bug 40505; bugfix on 0.2.5.4-alpha.
742 o Documentation (man, relay):
743 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
744 bugfix on 0.4.6.1-alpha.
747 Changes in version 0.4.6.9 - 2021-12-15
748 This version fixes several bugs from earlier versions of Tor. One important
749 piece is the removal of DNS timeout metric from the overload general signal.
750 See below for more details.
752 o Major bugfixes (relay, overload):
753 - Don't make Tor DNS timeout trigger an overload general state.
754 These timeouts are different from DNS server timeout. They have to
755 be seen as timeout related to UX and not because of a network
756 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
758 o Minor feature (reproducible build):
759 - The repository can now build reproducible tarballs which adds the
760 build command "make dist-reprod" for that purpose. Closes
763 o Minor features (compilation):
764 - Give an error message if trying to build with a version of
765 LibreSSL known not to work with Tor. (There's an incompatibility
766 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
767 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
770 o Minor features (fallbackdir):
771 - Regenerate fallback directories generated on December 15, 2021.
773 o Minor features (geoip data):
774 - Update the geoip files to match the IPFire Location Database, as
775 retrieved on 2021/12/15.
777 o Minor bugfixes (compilation):
778 - Fix our configuration logic to detect whether we had OpenSSL 3:
779 previously, our logic was reversed. This has no other effect than
780 to change whether we suppress deprecated API warnings. Fixes bug
781 40429; bugfix on 0.3.5.13.
783 o Minor bugfixes (relay):
784 - Reject IPv6-only DirPorts. Our reachability self-test forces
785 DirPorts to be IPv4, but our configuration parser allowed them to
786 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
787 bugfix on 0.4.5.1-alpha.
789 o Documentation (man, relay):
790 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
791 bugfix on 0.4.6.1-alpha.
794 Changes in version 0.4.7.2-alpha - 2021-10-26
795 This second alpha release of the 0.4.7.x series adds two major
796 features: congestion control (prop324) for network performance, and
797 the MiddleOnly flag (prop335) voted by the authorities to pin relays
798 to the middle position for various network health reasons. This
799 release also fixes numerous bugs.
801 The congestion control feature, detailed in proposal 324, still needs
802 more work before we can enable it by default. It is currently in its
803 testing and tuning phase which means that you should expect more
804 0.4.7.x alphas as congestion control gets stabilized and tuned for
805 optimal performance. And so, at this release, it can not be used
806 without a custom patch.
808 o Major features (congestion control):
809 - Implement support for flow control over congestion controlled
810 circuits. This work comes from proposal 324. Closes ticket 40450.
812 o Major features (directory authority):
813 - Add a new consensus method to handle MiddleOnly specially. When
814 enough authorities are using this method, then any relay tagged
815 with the MiddleOnly flag will have its Exit, Guard, HSDir, and
816 V2Dir flags automatically cleared, and will have its BadExit flag
817 automatically set. Implements part of proposal 335.
818 - Authorities can now be configured to label relays as "MiddleOnly".
819 When voting for this flag, authorities automatically vote against
820 Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
821 part of proposal 335. Based on a patch from Neel Chauhan.
823 o Major bugfix (relay, metrics):
824 - On the MetricsPort, the DNS error statistics are not reported by
825 record type ("record=...") anymore due to a libevent bug
826 (https://github.com/libevent/libevent/issues/1219). Fixes bug
827 40490; bugfix on 0.4.7.1-alpha.
829 o Major bugfixes (relay, overload state):
830 - Relays report the general overload state for DNS timeout errors
831 only if X% of all DNS queries over Y seconds are errors. Before
832 that, it only took 1 timeout to report the overload state which
833 was just too low of a threshold. The X and Y values are 1% and 10
834 minutes respectively but they are also controlled by consensus
835 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
837 o Minor feature (authority, relay):
838 - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
839 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
841 o Minor feature (onion service v2):
842 - Onion service v2 addresses are now not recognized anymore by tor
843 meaning a bad hostname is returned when attempting to pass it on a
844 SOCKS connection. No more deprecation log is emitted client side.
846 - See https://blog.torproject.org/v2-deprecation-timeline for
847 details on how to transition from v2 to v3.
849 o Minor features (fallbackdir):
850 - Regenerate fallback directories for October 2021. Closes
853 o Minor features (logging, heartbeat):
854 - When a relay receives a cell that isn't encrypted properly for it,
855 but the relay is the last hop on the circuit, the relay now counts
856 how many cells of this kind it receives, on how many circuits, and
857 reports this information in the log. Previously, we'd log each
858 cell at PROTOCOL_WARN level, which is far too verbose to be
859 useful. Fixes part of ticket 40400.
861 o Minor features (testing):
862 - We now have separate fuzzers for the inner layers of v3 onion
863 service descriptors, to prevent future bugs like 40392. Closes
866 o Minor bugfixes (compilation):
867 - Fix compilation error when __NR_time is not defined. Fixes bug
868 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
870 o Minor bugfixes (dirauth, bandwidth scanner):
871 - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
872 to avoid voting on bandwidth scanner weights to v3 directory
873 authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
876 o Minor bugfixes (fragile-hardening, sandbox):
877 - When building with --enable-fragile-hardening, add or relax Linux
878 seccomp rules to allow AddressSanitizer to execute normally if the
879 process terminates with the sandbox active. This has the side
880 effect of disabling the filtering of file- and directory-open
881 requests on most systems and dilutes the effectiveness of the
882 sandbox overall, as a wider range of system calls must be
883 permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
885 o Minor bugfixes (logging):
886 - If a channel has never received or transmitted a cell, or seen a
887 client, do not calculate time diffs against 1/1/1970 but log a
888 better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
890 o Minor bugfixes (onion service):
891 - Fix a warning BUG that would occur often on heavily loaded onion
892 service leading to filling the logs with useless warnings. Fixes
893 bug 34083; bugfix on 0.3.2.1-alpha.
895 o Minor bugfix (CI, onion service):
896 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
897 bugfix on 0.3.2.1-alpha.
899 o Minor bugfixes (onion service, config):
900 - Fix a memory leak for a small config line string that could occur
901 if the onion service failed to be configured from file properly.
902 Fixes bug 40484; bugfix on 0.3.2.1-alpha.
904 o Minor bugfixes (onion service, TROVE-2021-008):
905 - Only log v2 access attempts once total, in order to not pollute
906 the logs with warnings and to avoid recording the times on disk
907 when v2 access was attempted. Note that the onion address was
908 _never_ logged. This counts as a Low-severity security issue.
909 Fixes bug 40474; bugfix on 0.4.5.8.
910 - Note that due to #40476 which removes v2 support entirely, this
911 log line is not emitted anymore. We still mention this in the
912 changelog because it is a Low-severity TROVE.
914 o Minor bugfixes (usability):
915 - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
916 at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
917 happen naturally if a client gives up on a rendezvous circuit
918 after sending INTRODUCE1. Fixes part of bug 40400; bugfix
920 - Do not log "circuit_receive_relay_cell failed" at
921 LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
922 would want to log this as a protocol warning, we are already
923 logging another warning from inside circuit_receive_relay_cell.
924 Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
926 o Code simplification and refactoring:
927 - Lower the official maximum for "guard-extreme-restriction-percent"
928 to 100. This has no effect on when the guard code will generate a
929 warning, but it makes the intent of the option clearer. Fixes bug
930 40486; bugfix on 0.3.0.1-alpha.
933 - Add unit tests for the Linux seccomp sandbox. Resolves
936 o Code simplification and refactoring (rust):
937 - Remove Rust support and its associated code. It is unsupported and
938 Rust focus should be shifted to arti. Closes ticket 40469.
940 o Testing (CI, chutney):
941 - Bump the data size that chutney transmits to 5MBytes in order to
942 trigger the flow control and congestion window code. Closes
946 Changes in version 0.4.6.8 - 2021-10-26
947 This version fixes several bugs from earlier versions of Tor. One
948 highlight is a fix on how we track DNS timeouts to report general
951 o Major bugfixes (relay, overload state):
952 - Relays report the general overload state for DNS timeout errors
953 only if X% of all DNS queries over Y seconds are errors. Before
954 that, it only took 1 timeout to report the overload state which
955 was just too low of a threshold. The X and Y values are 1% and 10
956 minutes respectively but they are also controlled by consensus
957 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
959 o Minor features (fallbackdir):
960 - Regenerate fallback directories for October 2021. Closes
963 o Minor features (testing):
964 - On a testing network, relays can now use the
965 TestingMinTimeToReportBandwidth option to change the smallest
966 amount of time over which they're willing to report their observed
967 maximum bandwidth. Previously, this was fixed at 1 day. For
968 safety, values under 2 hours are only supported on testing
969 networks. Part of a fix for ticket 40337.
970 - Relays on testing networks no longer rate-limit how frequently
971 they are willing to report new bandwidth measurements. Part of a
972 fix for ticket 40337.
973 - Relays on testing networks now report their observed bandwidths
974 immediately from startup. Previously, they waited until they had
975 been running for a full day. Closes ticket 40337.
977 o Minor bugfix (onion service):
978 - Do not flag an HSDir as non-running in case the descriptor upload
979 or fetch fails. An onion service closes pending directory
980 connections before uploading a new descriptor which can thus lead
981 to wrongly flagging many relays and thus affecting circuit building
982 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
983 - Improve logging when a bad HS version is given. Fixes bug 40476;
984 bugfix on 0.4.6.1-alpha.
986 o Minor bugfix (CI, onion service):
987 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
988 bugfix on 0.3.2.1-alpha.
990 o Minor bugfixes (compatibility):
991 - Fix compatibility with the most recent Libevent versions, which no
992 longer have an evdns_set_random_bytes() function. Because this
993 function has been a no-op since Libevent 2.0.4-alpha, it is safe
994 for us to just stop calling it. Fixes bug 40371; bugfix
997 o Minor bugfixes (onion service, TROVE-2021-008):
998 - Only log v2 access attempts once total, in order to not pollute
999 the logs with warnings and to avoid recording the times on disk
1000 when v2 access was attempted. Note that the onion address was
1001 _never_ logged. This counts as a Low-severity security issue.
1002 Fixes bug 40474; bugfix on 0.4.5.8.
1005 Changes in version 0.4.5.11 - 2021-10-26
1006 The major change in this version is that v2 onion services are now
1007 disabled at the client, service, and relay: any Tor nodes running this
1008 version and onward will stop supporting v2 onion services. This is the
1009 last step in the long deprecation process of v2 onion services.
1010 Everyone running an earlier version, whether as a client, a relay, or
1011 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
1014 o Major feature (onion service v2):
1015 - See https://blog.torproject.org/v2-deprecation-timeline for
1016 details on how to transition from v2 to v3.
1017 - The control port commands HSFETCH and HSPOST no longer allow
1018 version 2, and it is no longer possible to create a v2 service
1020 - Tor no longer allows creating v2 services, or connecting as a
1021 client to a v2 service. Relays will decline to be a v2 HSDir or
1022 introduction point. This effectively disables onion service
1023 version 2 Tor-wide. Closes ticket 40476.
1025 o Minor features (bridge, backport from 0.4.6.8):
1026 - We now announce the URL to Tor's new bridge status at
1027 https://bridges.torproject.org/ when Tor is configured to run as a
1028 bridge relay. Closes ticket 30477.
1030 o Minor features (fallbackdir):
1031 - Regenerate fallback directories for October 2021. Closes
1034 o Minor features (logging, diagnostic, backport from 0.4.6.5):
1035 - Log decompression failures at a higher severity level, since they
1036 can help provide missing context for other warning messages. We
1037 rate-limit these messages, to avoid flooding the logs if they
1038 begin to occur frequently. Closes ticket 40175.
1040 o Minor features (testing, backport from 0.4.6.8):
1041 - On a testing network, relays can now use the
1042 TestingMinTimeToReportBandwidth option to change the smallest
1043 amount of time over which they're willing to report their observed
1044 maximum bandwidth. Previously, this was fixed at 1 day. For
1045 safety, values under 2 hours are only supported on testing
1046 networks. Part of a fix for ticket 40337.
1047 - Relays on testing networks no longer rate-limit how frequently
1048 they are willing to report new bandwidth measurements. Part of a
1049 fix for ticket 40337.
1050 - Relays on testing networks now report their observed bandwidths
1051 immediately from startup. Previously, they waited until they had
1052 been running for a full day. Closes ticket 40337.
1054 o Minor bugfix (CI, onion service):
1055 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
1056 bugfix on 0.3.2.1-alpha.
1058 o Minor bugfix (onion service, backport from 0.4.6.8):
1059 - Do not flag an HSDir as non-running in case the descriptor upload
1060 or fetch fails. An onion service closes pending directory
1061 connections before uploading a new descriptor which can thus lead
1062 to wrongly flagging many relays and thus affecting circuit building
1063 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
1065 o Minor bugfixes (compatibility, backport from 0.4.6.8):
1066 - Fix compatibility with the most recent Libevent versions, which no
1067 longer have an evdns_set_random_bytes() function. Because this
1068 function has been a no-op since Libevent 2.0.4-alpha, it is safe
1069 for us to just stop calling it. Fixes bug 40371; bugfix
1072 o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
1073 - Avoid a set of bugs that could be caused by inconsistently
1074 preferring an out-of-date consensus stored in a stale directory
1075 cache over a more recent one stored on disk as the latest
1076 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
1078 o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
1079 - Only log v2 access attempts once total, in order to not pollute
1080 the logs with warnings and to avoid recording the times on disk
1081 when v2 access was attempted. Note that the onion address was
1082 _never_ logged. This counts as a Low-severity security issue.
1083 Fixes bug 40474; bugfix on 0.4.5.8.
1086 Changes in version 0.3.5.17 - 2021-10-26
1087 The major change in this version is that v2 onion services are now
1088 disabled at the client, service, and relay: any Tor nodes running this
1089 version and onward will stop supporting v2 onion services. This is the
1090 last step in the long deprecation process of v2 onion services.
1091 Everyone running an earlier version, whether as a client, a relay, or
1092 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
1095 o Major feature (onion service v2, backport from 0.4.5.11):
1096 - See https://blog.torproject.org/v2-deprecation-timeline for
1097 details on how to transition from v2 to v3.
1098 - The control port commands HSFETCH and HSPOST no longer allow
1099 version 2, and it is no longer possible to create a v2 service
1101 - Tor no longer allows creating v2 services, or connecting as a
1102 client to a v2 service. Relays will decline to be a v2 HSDir or
1103 introduction point. This effectively disables onion service
1104 version 2 Tor-wide. Closes ticket 40476.
1106 o Minor features (bridge, backport from 0.4.6.8):
1107 - We now announce the URL to Tor's new bridge status at
1108 https://bridges.torproject.org/ when Tor is configured to run as a
1109 bridge relay. Closes ticket 30477.
1111 o Minor features (fallbackdir):
1112 - Regenerate fallback directories for October 2021. Closes
1115 o Minor bugfixes (compatibility, backport from 0.4.6.8):
1116 - Fix compatibility with the most recent Libevent versions, which no
1117 longer have an evdns_set_random_bytes() function. Because this
1118 function has been a no-op since Libevent 2.0.4-alpha, it is safe
1119 for us to just stop calling it. Fixes bug 40371; bugfix
1123 Changes in version 0.4.7.1-alpha - 2021-09-17
1124 This version is the first alpha release of the 0.4.7.x series. One
1125 major feature is Vanguards Lite, from proposal 333, to help mitigate
1126 guard discovery attacks against onion services. It also includes
1129 o Major features (Proposal 332, onion services, guard selection algorithm):
1130 - Clients and onion services now choose four long-lived "layer 2"
1131 guard relays for use as the middle hop in all onion circuits.
1132 These relays are kept in place for a randomized duration averaging
1133 1 week. This mitigates guard discovery attacks against clients and
1134 short-lived onion services such as OnionShare. Long-lived onion
1135 services that need high security should still use the Vanguards
1136 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
1137 40363; implements proposal 333.
1139 o Minor features (bridge testing support):
1140 - Let external bridge reachability testing tools discard cached
1141 bridge descriptors when setting new bridges, so they can be sure
1142 to get a clean reachability test. Implements ticket 40209.
1144 o Minor features (fuzzing):
1145 - When building with --enable-libfuzzer, use a set of compiler flags
1146 that works with more recent versions of the library. Previously we
1147 were using a set of flags from 2017. Closes ticket 40407.
1149 o Minor features (testing configuration):
1150 - When TestingTorNetwork is enabled, skip the permissions check on
1151 hidden service directories. Closes ticket 40338.
1152 - On a testing network, relays can now use the
1153 TestingMinTimeToReportBandwidth option to change the smallest
1154 amount of time over which they're willing to report their observed
1155 maximum bandwidth. Previously, this was fixed at 1 day. For
1156 safety, values under 2 hours are only supported on testing
1157 networks. Part of a fix for ticket 40337.
1158 - Relays on testing networks no longer rate-limit how frequently
1159 they are willing to report new bandwidth measurements. Part of a
1160 fix for ticket 40337.
1161 - Relays on testing networks now report their observed bandwidths
1162 immediately from startup. Previously, they waited until they had
1163 been running for a full day. Closes ticket 40337.
1165 o Minor bugfixes (circuit padding):
1166 - Don't send STOP circuit padding cells when the other side has
1167 already shut down the corresponding padding machine. Fixes bug
1168 40435; bugfix on 0.4.0.1-alpha.
1170 o Minor bugfixes (compatibility):
1171 - Fix compatibility with the most recent Libevent versions, which no
1172 longer have an evdns_set_random_bytes() function. Because this
1173 function has been a no-op since Libevent 2.0.4-alpha, it is safe
1174 for us to just stop calling it. Fixes bug 40371; bugfix
1177 o Minor bugfixes (control, sandbox):
1178 - Allows the control command SAVECONF to succeed when the seccomp
1179 sandbox is enabled. Makes SAVECONF keep only one backup file, to
1180 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
1181 Patch by Daniel Pinto.
1183 o Minor bugfixes (heartbeat):
1184 - Adjust the heartbeat log message about distinct clients to
1185 consider the HeartbeatPeriod rather than a flat 6-hour delay.
1186 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
1188 o Minor bugfixes (logging, relay):
1189 - Add spaces between the "and" when logging the "Your server has not
1190 managed to confirm reachability for its" on dual-stack relays.
1191 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
1193 o Minor bugfixes (onion service):
1194 - Do not flag an HSDir as non-running in case the descriptor upload
1195 or fetch fails. An onion service closes pending directory
1196 connections before uploading a new descriptor which leads to
1197 wrongly flagging many relays and thus affecting circuit path
1198 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
1200 o Minor bugfixes (statistics):
1201 - Fix a fencepost issue when we check stability_last_downrated where
1202 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
1203 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
1205 o Minor bugfixes (tests):
1206 - Fix a bug that prevented some tests from running with the correct
1207 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
1210 - Add links to original tor design paper and anonbib to
1211 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
1213 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
1214 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
1217 Changes in version 0.4.6.7 - 2021-08-16
1218 This version fixes several bugs from earlier versions of Tor,
1219 including one that could lead to a denial-of-service attack. Everyone
1220 running an earlier version, whether as a client, a relay, or an onion
1221 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
1223 o Major bugfixes (cryptography, security):
1224 - Resolve an assertion failure caused by a behavior mismatch between
1225 our batch-signature verification code and our single-signature
1226 verification code. This assertion failure could be triggered
1227 remotely, leading to a denial of service attack. We fix this issue
1228 by disabling batch verification. Fixes bug 40078; bugfix on
1229 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
1230 CVE-2021-38385. Found by Henry de Valence.
1232 o Minor feature (fallbackdir):
1233 - Regenerate fallback directories list. Close ticket 40447.
1235 o Minor features (geoip data):
1236 - Update the geoip files to match the IPFire Location Database, as
1237 retrieved on 2021/08/12.
1239 o Minor bugfix (crypto):
1240 - Disable the unused batch verification feature of ed25519-donna.
1241 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
1244 o Minor bugfixes (onion service):
1245 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
1246 Address) for a v2 onion address. Fixes bug 40421; bugfix
1249 o Minor bugfixes (relay):
1250 - Reduce the compression level for data streaming from HIGH to LOW
1251 in order to reduce CPU load on the directory relays. Fixes bug
1252 40301; bugfix on 0.3.5.1-alpha.
1254 o Minor bugfixes (timekeeping):
1255 - Calculate the time of day correctly on systems where the time_t
1256 type includes leap seconds. (This is not the case on most
1257 operating systems, but on those where it occurs, our tor_timegm
1258 function did not correctly invert the system's gmtime function,
1259 which could result in assertion failures when calculating voting
1260 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
1263 Changes in version 0.4.5.10 - 2021-08-16
1264 This version fixes several bugs from earlier versions of Tor,
1265 including one that could lead to a denial-of-service attack. Everyone
1266 running an earlier version, whether as a client, a relay, or an onion
1267 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
1269 o Major bugfixes (cryptography, security):
1270 - Resolve an assertion failure caused by a behavior mismatch between
1271 our batch-signature verification code and our single-signature
1272 verification code. This assertion failure could be triggered
1273 remotely, leading to a denial of service attack. We fix this issue
1274 by disabling batch verification. Fixes bug 40078; bugfix on
1275 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
1276 CVE-2021-38385. Found by Henry de Valence.
1278 o Minor feature (fallbackdir):
1279 - Regenerate fallback directories list. Close ticket 40447.
1281 o Minor features (geoip data):
1282 - Update the geoip files to match the IPFire Location Database, as
1283 retrieved on 2021/08/12.
1285 o Minor features (testing):
1286 - Enable the deterministic RNG for unit tests that covers the
1287 address set bloomfilter-based API's. Fixes bug 40419; bugfix
1290 o Minor bugfix (crypto, backport from 0.4.6.7):
1291 - Disable the unused batch verification feature of ed25519-donna.
1292 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
1295 o Minor bugfixes (relay, backport from 0.4.6.7):
1296 - Reduce the compression level for data streaming from HIGH to LOW.
1297 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1299 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
1300 - Calculate the time of day correctly on systems where the time_t
1301 type includes leap seconds. (This is not the case on most
1302 operating systems, but on those where it occurs, our tor_timegm
1303 function did not correctly invert the system's gmtime function,
1304 which could result in assertion failures when calculating voting
1305 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
1307 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
1308 - Suppress a strict-prototype warning when building with some
1309 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
1312 Changes in version 0.3.5.16 - 2021-08-16
1313 This version fixes several bugs from earlier versions of Tor,
1314 including one that could lead to a denial-of-service attack. Everyone
1315 running an earlier version, whether as a client, a relay, or an onion
1316 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
1318 o Major bugfixes (cryptography, security):
1319 - Resolve an assertion failure caused by a behavior mismatch between
1320 our batch-signature verification code and our single-signature
1321 verification code. This assertion failure could be triggered
1322 remotely, leading to a denial of service attack. We fix this issue
1323 by disabling batch verification. Fixes bug 40078; bugfix on
1324 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
1325 CVE-2021-38385. Found by Henry de Valence.
1327 o Minor feature (fallbackdir):
1328 - Regenerate fallback directories list. Close ticket 40447.
1330 o Minor features (geoip data):
1331 - Update the geoip files to match the IPFire Location Database, as
1332 retrieved on 2021/08/12.
1334 o Minor bugfix (crypto, backport from 0.4.6.7):
1335 - Disable the unused batch verification feature of ed25519-donna.
1336 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
1339 o Minor bugfixes (relay, backport from 0.4.6.7):
1340 - Reduce the compression level for data streaming from HIGH to LOW.
1341 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1344 Changes in version 0.4.6.6 - 2021-06-30
1345 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
1346 allows Tor to build correctly on older versions of GCC. You should
1347 upgrade to this version if you were having trouble building Tor
1348 0.4.6.5; otherwise, there is probably no need.
1350 o Minor bugfixes (compilation):
1351 - Fix a compilation error when trying to build Tor with a compiler
1352 that does not support const variables in static initializers.
1353 Fixes bug 40410; bugfix on 0.4.6.5.
1354 - Suppress a strict-prototype warning when building with some
1355 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
1357 o Minor bugfixes (testing):
1358 - Enable the deterministic RNG for unit tests that covers the
1359 address set bloomfilter-based API's. Fixes bug 40419; bugfix
1363 Changes in version 0.4.5.9 - 2021-06-14
1364 Tor 0.4.5.9 fixes several security issues, including a
1365 denial-of-service attack against onion service clients, and another
1366 denial-of-service attack against relays. Everybody should upgrade to
1367 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1369 o Major bugfixes (security, backport from 0.4.6.5):
1370 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1371 half-closed streams. Previously, clients failed to validate which
1372 hop sent these cells: this would allow a relay on a circuit to end
1373 a stream that wasn't actually built with it. Fixes bug 40389;
1374 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1375 003 and CVE-2021-34548.
1377 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1378 - Detect more failure conditions from the OpenSSL RNG code.
1379 Previously, we would detect errors from a missing RNG
1380 implementation, but not failures from the RNG code itself.
1381 Fortunately, it appears those failures do not happen in practice
1382 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1383 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1384 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1386 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1387 - Resist a hashtable-based CPU denial-of-service attack against
1388 relays. Previously we used a naive unkeyed hash function to look
1389 up circuits in a circuitmux object. An attacker could exploit this
1390 to construct circuits with chosen circuit IDs, to create
1391 collisions and make the hash table inefficient. Now we use a
1392 SipHash construction here instead. Fixes bug 40391; bugfix on
1393 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1394 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1395 - Fix an out-of-bounds memory access in v3 onion service descriptor
1396 parsing. An attacker could exploit this bug by crafting an onion
1397 service descriptor that would crash any client that tried to visit
1398 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1399 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1400 Glazunov from Google's Project Zero.
1402 o Minor features (compatibility, backport from 0.4.6.4-rc):
1403 - Remove an assertion function related to TLS renegotiation. It was
1404 used nowhere outside the unit tests, and it was breaking
1405 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1408 o Minor features (geoip data):
1409 - Update the geoip files to match the IPFire Location Database, as
1410 retrieved on 2021/06/10.
1412 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
1413 - Allow the control command SAVECONF to succeed when the seccomp
1414 sandbox is enabled, and make SAVECONF keep only one backup file to
1415 simplify implementation. Previously SAVECONF allowed a large
1416 number of backup files, which made it incompatible with the
1417 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
1420 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
1421 - Fix a bug that made tor try to re-bind() on an already open
1422 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
1426 Changes in version 0.4.4.9 - 2021-06-14
1427 Tor 0.4.4.9 fixes several security issues, including a
1428 denial-of-service attack against onion service clients, and another
1429 denial-of-service attack against relays. Everybody should upgrade to
1430 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1432 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
1433 June 15. This is therefore the last release in its series. Everybody
1434 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
1436 o Major bugfixes (security, backport from 0.4.6.5):
1437 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1438 half-closed streams. Previously, clients failed to validate which
1439 hop sent these cells: this would allow a relay on a circuit to end
1440 a stream that wasn't actually built with it. Fixes bug 40389;
1441 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1442 003 and CVE-2021-34548.
1444 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1445 - Detect more failure conditions from the OpenSSL RNG code.
1446 Previously, we would detect errors from a missing RNG
1447 implementation, but not failures from the RNG code itself.
1448 Fortunately, it appears those failures do not happen in practice
1449 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1450 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1451 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1453 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1454 - Resist a hashtable-based CPU denial-of-service attack against
1455 relays. Previously we used a naive unkeyed hash function to look
1456 up circuits in a circuitmux object. An attacker could exploit this
1457 to construct circuits with chosen circuit IDs, to create
1458 collisions and make the hash table inefficient. Now we use a
1459 SipHash construction here instead. Fixes bug 40391; bugfix on
1460 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1461 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1462 - Fix an out-of-bounds memory access in v3 onion service descriptor
1463 parsing. An attacker could exploit this bug by crafting an onion
1464 service descriptor that would crash any client that tried to visit
1465 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1466 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1467 Glazunov from Google's Project Zero.
1469 o Minor features (compatibility, backport from 0.4.6.4-rc):
1470 - Remove an assertion function related to TLS renegotiation. It was
1471 used nowhere outside the unit tests, and it was breaking
1472 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1475 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1476 - Regenerate the list of fallback directories to contain a new set
1477 of 200 relays. Closes ticket 40265.
1479 o Minor features (geoip data):
1480 - Update the geoip files to match the IPFire Location Database, as
1481 retrieved on 2021/06/10.
1483 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1484 - Fix a non-fatal BUG() message due to a too-early free of a string,
1485 when listing a client connection from the DoS defenses subsystem.
1486 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1488 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1489 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1490 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1493 Changes in version 0.3.5.15 - 2021-06-14
1494 Tor 0.3.5.15 fixes several security issues, including a
1495 denial-of-service attack against onion service clients, and another
1496 denial-of-service attack against relays. Everybody should upgrade to
1497 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1499 o Major bugfixes (security, backport from 0.4.6.5):
1500 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1501 half-closed streams. Previously, clients failed to validate which
1502 hop sent these cells: this would allow a relay on a circuit to end
1503 a stream that wasn't actually built with it. Fixes bug 40389;
1504 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1505 003 and CVE-2021-34548.
1507 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1508 - Detect more failure conditions from the OpenSSL RNG code.
1509 Previously, we would detect errors from a missing RNG
1510 implementation, but not failures from the RNG code itself.
1511 Fortunately, it appears those failures do not happen in practice
1512 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1513 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1514 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1516 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1517 - Resist a hashtable-based CPU denial-of-service attack against
1518 relays. Previously we used a naive unkeyed hash function to look
1519 up circuits in a circuitmux object. An attacker could exploit this
1520 to construct circuits with chosen circuit IDs, to create
1521 collisions and make the hash table inefficient. Now we use a
1522 SipHash construction here instead. Fixes bug 40391; bugfix on
1523 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1524 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1525 - Fix an out-of-bounds memory access in v3 onion service descriptor
1526 parsing. An attacker could exploit this bug by crafting an onion
1527 service descriptor that would crash any client that tried to visit
1528 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1529 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1530 Glazunov from Google's Project Zero.
1532 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1533 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1534 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1536 o Minor features (compatibility, backport from 0.4.6.4-rc):
1537 - Remove an assertion function related to TLS renegotiation. It was
1538 used nowhere outside the unit tests, and it was breaking
1539 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1542 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1543 - Regenerate the list of fallback directories to contain a new set
1544 of 200 relays. Closes ticket 40265.
1546 o Minor features (geoip data):
1547 - Update the geoip files to match the IPFire Location Database, as
1548 retrieved on 2021/06/10.
1551 Changes in version 0.4.6.5 - 2021-06-14
1552 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
1553 series includes numerous features and bugfixes, including a significant
1554 improvement to our circuit timeout algorithm that should improve
1555 observed client performance, and a way for relays to report when they are
1558 This release also includes security fixes for several security issues,
1559 including a denial-of-service attack against onion service clients,
1560 and another denial-of-service attack against relays. Everybody should
1561 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1563 Below are the changes since 0.4.6.4-rc. For a complete list of changes
1564 since 0.4.5.8, see the ReleaseNotes file.
1566 o Major bugfixes (security):
1567 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1568 half-closed streams. Previously, clients failed to validate which
1569 hop sent these cells: this would allow a relay on a circuit to end
1570 a stream that wasn't actually built with it. Fixes bug 40389;
1571 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1572 003 and CVE-2021-34548.
1574 o Major bugfixes (security, defense-in-depth):
1575 - Detect more failure conditions from the OpenSSL RNG code.
1576 Previously, we would detect errors from a missing RNG
1577 implementation, but not failures from the RNG code itself.
1578 Fortunately, it appears those failures do not happen in practice
1579 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1580 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1581 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1583 o Major bugfixes (security, denial of service):
1584 - Resist a hashtable-based CPU denial-of-service attack against
1585 relays. Previously we used a naive unkeyed hash function to look
1586 up circuits in a circuitmux object. An attacker could exploit this
1587 to construct circuits with chosen circuit IDs, to create
1588 collisions and make the hash table inefficient. Now we use a
1589 SipHash construction here instead. Fixes bug 40391; bugfix on
1590 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1591 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1592 - Fix an out-of-bounds memory access in v3 onion service descriptor
1593 parsing. An attacker could exploit this bug by crafting an onion
1594 service descriptor that would crash any client that tried to visit
1595 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1596 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1597 Glazunov from Google's Project Zero.
1599 o Minor features (geoip data):
1600 - Update the geoip files to match the IPFire Location Database, as
1601 retrieved on 2021/06/10.
1603 o Minor features (logging, diagnostic):
1604 - Log decompression failures at a higher severity level, since they
1605 can help provide missing context for other warning messages. We
1606 rate-limit these messages, to avoid flooding the logs if they
1607 begin to occur frequently. Closes ticket 40175.
1610 Changes in version 0.4.6.4-rc - 2021-05-28
1611 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
1612 the final release candidate in its series: unless major new issues are
1613 found, the next release will be stable.
1615 o Minor features (compatibility):
1616 - Remove an assertion function related to TLS renegotiation. It was
1617 used nowhere outside the unit tests, and it was breaking
1618 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1621 o Minor bugfixes (consensus handling):
1622 - Avoid a set of bugs that could be caused by inconsistently
1623 preferring an out-of-date consensus stored in a stale directory
1624 cache over a more recent one stored on disk as the latest
1625 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
1627 o Minor bugfixes (control, sandbox):
1628 - Allow the control command SAVECONF to succeed when the seccomp
1629 sandbox is enabled, and make SAVECONF keep only one backup file to
1630 simplify implementation. Previously SAVECONF allowed a large
1631 number of backup files, which made it incompatible with the
1632 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
1635 o Minor bugfixes (metrics port):
1636 - Fix a bug that made tor try to re-bind() on an already open
1637 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
1641 - Remove unneeded code for parsing private keys in directory
1642 documents. This code was only used for client authentication in v2
1643 onion services, which are now unsupported. Closes ticket 40374.
1646 Changes in version 0.4.5.8 - 2021-05-10
1647 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
1648 from the 0.4.6.x series.
1650 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
1651 - Add a workaround to enable the Linux sandbox to work correctly
1652 with Glibc 2.33. This version of Glibc has started using the
1653 fstatat() system call, which previously our sandbox did not allow.
1654 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1656 o Minor features (compilation, backport from 0.4.6.3-rc):
1657 - Make the autoconf script build correctly with autoconf versions
1658 2.70 and later. Closes part of ticket 40335.
1660 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1661 - Regenerate the list of fallback directories to contain a new set
1662 of 200 relays. Closes ticket 40265.
1664 o Minor features (geoip data):
1665 - Update the geoip files to match the IPFire Location Database, as
1666 retrieved on 2021/05/07.
1668 o Minor features (onion services):
1669 - Add warning message when connecting to now deprecated v2 onion
1670 services. As announced, Tor 0.4.5.x is the last series that will
1671 support v2 onions. Closes ticket 40373.
1673 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
1674 - Fix a regression that made it impossible start Tor using a bridge
1675 line with a transport name and no fingerprint. Fixes bug 40360;
1676 bugfix on 0.4.5.4-rc.
1678 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
1679 - Allow a custom "ar" for cross-compilation. Our previous build
1680 script had used the $AR environment variable in most places, but
1681 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1683 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1684 - Fix a non-fatal BUG() message due to a too-early free of a string,
1685 when listing a client connection from the DoS defenses subsystem.
1686 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1688 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1689 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1690 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1692 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
1693 - Fix a "BUG" warning that would appear when a controller chooses
1694 the first hop for a circuit, and that circuit completes. Fixes bug
1695 40285; bugfix on 0.3.2.1-alpha.
1697 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
1698 - Fix a bug where an expired cached descriptor could get overwritten
1699 with a new one without freeing it, leading to a memory leak. Fixes
1700 bug 40356; bugfix on 0.3.5.1-alpha.
1702 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
1703 - Fix pattern-matching errors when patterns expand to invalid paths
1704 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1708 Changes in version 0.4.6.3-rc - 2021-05-10
1709 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
1710 a few small bugs from previous versions, and adds a better error
1711 message when trying to use (no longer supported) v2 onion services.
1713 Though we anticipate that we'll be doing a bit more clean-up between
1714 now and the stable release, we expect that our remaining changes will
1715 be fairly simple. There will likely be at least one more release
1716 candidate before 0.4.6.x is stable.
1718 o Major bugfixes (onion service, control port):
1719 - Make the ADD_ONION command properly configure client authorization.
1720 Before this fix, the created onion failed to add the client(s).
1721 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
1723 o Minor features (compatibility, Linux seccomp sandbox):
1724 - Add a workaround to enable the Linux sandbox to work correctly
1725 with Glibc 2.33. This version of Glibc has started using the
1726 fstatat() system call, which previously our sandbox did not allow.
1727 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1729 o Minor features (compilation):
1730 - Make the autoconf script build correctly with autoconf versions
1731 2.70 and later. Closes part of ticket 40335.
1733 o Minor features (geoip data):
1734 - Update the geoip files to match the IPFire Location Database, as
1735 retrieved on 2021/05/07.
1737 o Minor features (onion services):
1738 - Add a warning message when trying to connect to (no longer
1739 supported) v2 onion services. Closes ticket 40373.
1741 o Minor bugfixes (build, cross-compilation):
1742 - Allow a custom "ar" for cross-compilation. Our previous build
1743 script had used the $AR environment variable in most places, but
1744 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1746 o Minor bugfixes (compiler warnings):
1747 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1748 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1750 o Minor bugfixes (logging, relay):
1751 - Emit a warning if an Address is found to be internal and tor can't
1752 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
1754 o Minor bugfixes (onion service, client, memory leak):
1755 - Fix a bug where an expired cached descriptor could get overwritten
1756 with a new one without freeing it, leading to a memory leak. Fixes
1757 bug 40356; bugfix on 0.3.5.1-alpha.
1760 Changes in version 0.4.6.2-alpha - 2021-04-15
1761 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
1762 small bugs in previous releases, and solves other issues that had
1763 enabled denial-of-service attacks and affected integration with
1766 o Minor features (client):
1767 - Clients now check whether their streams are attempting to re-enter
1768 the Tor network (i.e. to send Tor traffic over Tor), and close
1769 them preemptively if they think exit relays will refuse them for
1770 this reason. See ticket 2667 for details. Closes ticket 40271.
1772 o Minor features (command line):
1773 - Add long format name "--torrc-file" equivalent to the existing
1774 command-line option "-f". Closes ticket 40324. Patch by
1777 o Minor features (dormant mode):
1778 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
1779 control over whether the client ever becomes dormant from
1780 inactivity. Most people won't need this. Closes ticket 40228.
1782 o Minor features (fallback directory list):
1783 - Regenerate the list of fallback directories to contain a new set
1784 of 200 relays. Closes ticket 40265.
1786 o Minor features (geoip data):
1787 - Update the geoip files to match the IPFire Location Database, as
1788 retrieved on 2021/04/13.
1790 o Minor features (logging):
1791 - Edit heartbeat log messages so that more of them begin with the
1792 string "Heartbeat: ". Closes ticket 40322; patch
1795 o Minor bugfixes (bridge, pluggable transport):
1796 - Fix a regression that made it impossible start Tor using a bridge
1797 line with a transport name and no fingerprint. Fixes bug 40360;
1798 bugfix on 0.4.5.4-rc.
1800 o Minor bugfixes (channel, DoS):
1801 - Fix a non-fatal BUG() message due to a too-early free of a string,
1802 when listing a client connection from the DoS defenses subsystem.
1803 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1805 o Minor bugfixes (compilation):
1806 - Fix a compilation warning about unused functions when building
1807 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
1808 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
1810 o Minor bugfixes (configuration):
1811 - Fix pattern-matching for directories on all platforms when using
1812 %include options in configuration files. This patch also fixes
1813 compilation on musl libc based systems. Fixes bug 40141; bugfix
1816 o Minor bugfixes (relay):
1817 - Move the "overload-general" line from extrainfo to the server
1818 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
1820 o Minor bugfixes (testing, BSD):
1821 - Fix pattern-matching errors when patterns expand to invalid paths
1822 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1825 o Documentation (manual):
1826 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
1828 - Indicate that the HiddenServiceStatistics option also applies to
1829 bridges. Closes ticket 40346.
1830 - Move the description of BridgeRecordUsageByCountry to the section
1831 "STATISTICS OPTIONS". Closes ticket 40323.
1834 Changes in version 0.4.6.1-alpha - 2021-03-18
1835 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
1836 improves client circuit performance, adds missing features, and
1837 improves some of our DoS handling and statistics reporting. It also
1838 includes numerous smaller bugfixes.
1840 Below are the changes since 0.4.5.7. (Note that this release DOES
1841 include the fixes for the security bugs already fixed in 0.4.5.7.)
1843 o Major features (control port, onion services):
1844 - Add controller support for creating version 3 onion services with
1845 client authorization. Previously, only v2 onion services could be
1846 created with client authorization. Closes ticket 40084. Patch by
1849 o Major features (directory authority):
1850 - When voting on a relay with a Sybil-like appearance, add the Sybil
1851 flag when clearing out the other flags. This lets a relay operator
1852 know why their relay hasn't been included in the consensus. Closes
1853 ticket 40255. Patch by Neel Chauhan.
1855 o Major features (metrics):
1856 - Relays now report how overloaded they are in their extrainfo
1857 documents. This information is controlled with the
1858 OverloadStatistics torrc option, and it will be used to improve
1859 decisions about the network's load balancing. Implements proposal
1860 328; closes ticket 40222.
1862 o Major features (relay, denial of service):
1863 - Add a new DoS subsystem feature to control the rate of client
1864 connections for relays. Closes ticket 40253.
1866 o Major features (statistics):
1867 - Relays now publish statistics about the number of v3 onion
1868 services and volume of v3 onion service traffic, in the same
1869 manner they already do for v2 onions. Closes ticket 23126.
1871 o Major bugfixes (circuit build timeout):
1872 - Improve the accuracy of our circuit build timeout calculation for
1873 60%, 70%, and 80% build rates for various guard choices. We now
1874 use a maximum likelihood estimator for Pareto parameters of the
1875 circuit build time distribution, instead of a "right-censored
1876 estimator". This causes clients to ignore circuits that never
1877 finish building in their timeout calculations. Previously, clients
1878 were counting such unfinished circuits as having the highest
1879 possible build time value, when in reality these circuits most
1880 likely just contain relays that are offline. We also now wait a
1881 bit longer to let circuits complete for measurement purposes,
1882 lower the minimum possible effective timeout from 1.5 seconds to
1883 10ms, and increase the resolution of the circuit build time
1884 histogram from 50ms bin widths to 10ms bin widths. Additionally,
1885 we alter our estimate Xm by taking the maximum of the top 10 most
1886 common build time values of the 10ms histogram, and compute Xm as
1887 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
1888 - Remove max_time calculation and associated warning from circuit
1889 build timeout 'alpha' parameter estimation, as this is no longer
1890 needed by our new estimator from 40168. Fixes bug 34088; bugfix
1893 o Major bugfixes (signing key):
1894 - In the tor-gencert utility, give an informative error message if
1895 the passphrase given in `--create-identity-key` is too short.
1896 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
1898 o Minor features (bridge):
1899 - We now announce the URL to Tor's new bridge status at
1900 https://bridges.torproject.org/ when Tor is configured to run as a
1901 bridge relay. Closes ticket 30477.
1903 o Minor features (build system):
1904 - New "make lsp" command to auto generate the compile_commands.json
1905 file used by the ccls server. The "bear" program is needed for
1906 this. Closes ticket 40227.
1908 o Minor features (command-line interface):
1909 - Add build informations to `tor --version` in order to ease
1910 reproducible builds. Closes ticket 32102.
1911 - When parsing command-line flags that take an optional argument,
1912 treat the argument as absent if it would start with a '-'
1913 character. Arguments in that form are not intelligible for any of
1914 our optional-argument flags. Closes ticket 40223.
1915 - Allow a relay operator to list the ed25519 keys on the command
1916 line by adding the `rsa` and `ed25519` arguments to the
1917 --list-fingerprint flag to show the respective RSA and ed25519
1918 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
1920 o Minor features (control port, stream handling):
1921 - Add the stream ID to the event line in the ADDRMAP control event.
1922 Closes ticket 40249. Patch by Neel Chauhan.
1924 o Minor features (dormant mode):
1925 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
1926 control over whether the client can become dormant from
1927 inactivity. Most people won't need this. Closes ticket 40228.
1929 o Minor features (logging):
1930 - Change the DoS subsystem heartbeat line format to be more clear on
1931 what has been detected/rejected, and which option is disabled (if
1932 any). Closes ticket 40308.
1933 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
1934 put brackets around IPv6 addresses in log messages. Closes ticket
1935 40232. Patch by Neel Chauhan.
1937 o Minor features (performance, windows):
1938 - Use SRWLocks to implement locking on Windows. Replaces the
1939 "critical section" locking implementation with the faster
1940 SRWLocks, available since Windows Vista. Closes ticket 17927.
1941 Patch by Daniel Pinto.
1943 o Minor features (protocol, proxy support, defense in depth):
1944 - Close HAProxy connections if they somehow manage to send us data
1945 before we start reading. Closes another case of ticket 40017.
1947 o Minor features (tests, portability):
1948 - Port the hs_build_address.py test script to work with recent
1949 versions of python. Closes ticket 40213. Patch from
1952 o Minor features (vote document):
1953 - Add a "stats" line to directory authority votes, to report various
1954 statistics that authorities compute about the relays. This will
1955 help us diagnose the network better. Closes ticket 40314.
1957 o Minor bugfixes (build):
1958 - The configure script now shows whether or not lzma and zstd have
1959 been used, not just if the enable flag was passed in. Fixes bug
1960 40236; bugfix on 0.4.3.1-alpha.
1962 o Minor bugfixes (compatibility):
1963 - Fix a failure in the test cases when running on the "hppa"
1964 architecture, along with a related test that might fail on other
1965 architectures in the future. Fixes bug 40274; bugfix
1968 o Minor bugfixes (controller):
1969 - Fix a "BUG" warning that would appear when a controller chooses
1970 the first hop for a circuit, and that circuit completes. Fixes bug
1971 40285; bugfix on 0.3.2.1-alpha.
1973 o Minor bugfixes (directory authorities, voting):
1974 - Add a new consensus method (31) to support any future changes that
1975 authorities decide to make to the value of bwweightscale or
1976 maxunmeasuredbw. Previously, there was a bug that prevented the
1977 authorities from parsing these consensus parameters correctly under
1978 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
1980 o Minor bugfixes (ipv6):
1981 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
1982 rare configurations might break, but in this case you can disable
1983 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
1984 on 0.4.1.1-alpha. Patch by Neel Chauhan.
1986 o Minor bugfixes (key generation):
1987 - Do not require a valid torrc when using the `--keygen` argument to
1988 generate a signing key. This allows us to generate keys on systems
1989 or users which may not run Tor. Fixes bug 40235; bugfix on
1990 0.2.7.2-alpha. Patch by Neel Chauhan.
1992 o Minor bugfixes (onion services, logging):
1993 - Downgrade the severity of a few rendezvous circuit-related
1994 warnings from warning to info. Fixes bug 40207; bugfix on
1995 0.3.2.1-alpha. Patch by Neel Chauhan.
1997 o Minor bugfixes (relay):
1998 - Reduce the compression level for data streaming from HIGH to LOW.
1999 This should reduce the CPU and memory burden for directory caches.
2000 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
2002 o Code simplification and refactoring:
2003 - Remove the orconn_ext_or_id_map structure and related functions.
2004 (Nothing outside of unit tests used them.) Closes ticket 33383.
2005 Patch by Neel Chauhan.
2008 - As of this release, Tor no longer supports the old v2 onion
2009 services. They were deprecated last July for security, and support
2010 will be removed entirely later this year. We strongly encourage
2011 everybody to migrate to v3 onion services. For more information,
2012 see https://blog.torproject.org/v2-deprecation-timeline . Closes
2013 ticket 40266. (NOTE: We accidentally released an earlier version
2014 of the 0.4.6.1-alpha changelog without this entry. Sorry for
2017 o Code simplification and refactoring (metrics, DoS):
2018 - Move the DoS subsystem into the subsys manager, including its
2019 configuration options. Closes ticket 40261.
2021 o Removed features (relay):
2022 - Because DirPorts are only used on authorities, relays no longer
2023 advertise them. Similarly, self-testing for DirPorts has been
2024 disabled, since an unreachable DirPort is no reason for a relay
2025 not to advertise itself. (Configuring a DirPort will still work,
2026 for now.) Closes ticket 40282.
2029 Changes in version 0.3.5.14 - 2021-03-16
2030 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
2031 in earlier versions of Tor.
2033 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
2034 who can send directory data to a Tor instance to force that Tor
2035 instance to consume huge amounts of CPU. This is easiest to exploit
2036 against authorities, since anybody can upload to them, but directory
2037 caches could also exploit this vulnerability against relays or clients
2038 when they download. The other vulnerability (TROVE-2021-002) only
2039 affects directory authorities, and would allow an attacker to remotely
2040 crash the authority with an assertion failure. Patches have already
2041 been provided to the authority operators, to help ensure
2044 We recommend that everybody upgrade to one of the releases that fixes
2045 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
2048 This release also updates our GeoIP data source, and fixes a
2049 compatibility issue.
2051 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
2052 - Disable the dump_desc() function that we used to dump unparseable
2053 information to disk. It was called incorrectly in several places,
2054 in a way that could lead to excessive CPU usage. Fixes bug 40286;
2055 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
2056 001 and CVE-2021-28089.
2057 - Fix a bug in appending detached signatures to a pending consensus
2058 document that could be used to crash a directory authority. Fixes
2059 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
2062 o Minor features (geoip data, backport from 0.4.5.7):
2063 - We have switched geoip data sources. Previously we shipped IP-to-
2064 country mappings from Maxmind's GeoLite2, but in 2019 they changed
2065 their licensing terms, so we were unable to update them after that
2066 point. We now ship geoip files based on the IPFire Location
2067 Database instead. (See https://location.ipfire.org/ for more
2068 information). This release updates our geoip files to match the
2069 IPFire Location Database as retrieved on 2021/03/12. Closes
2072 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
2073 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
2074 Closes ticket 40309.
2077 Changes in version 0.4.4.8 - 2021-03-16
2078 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
2079 in earlier versions of Tor.
2081 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
2082 who can send directory data to a Tor instance to force that Tor
2083 instance to consume huge amounts of CPU. This is easiest to exploit
2084 against authorities, since anybody can upload to them, but directory
2085 caches could also exploit this vulnerability against relays or clients
2086 when they download. The other vulnerability (TROVE-2021-002) only
2087 affects directory authorities, and would allow an attacker to remotely
2088 crash the authority with an assertion failure. Patches have already
2089 been provided to the authority operators, to help ensure
2092 We recommend that everybody upgrade to one of the releases that fixes
2093 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
2096 This release also updates our GeoIP data source, and fixes a
2097 compatibility issue.
2099 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
2100 - Disable the dump_desc() function that we used to dump unparseable
2101 information to disk. It was called incorrectly in several places,
2102 in a way that could lead to excessive CPU usage. Fixes bug 40286;
2103 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
2104 001 and CVE-2021-28089.
2105 - Fix a bug in appending detached signatures to a pending consensus
2106 document that could be used to crash a directory authority. Fixes
2107 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
2110 o Minor features (geoip data, backport from 0.4.5.7):
2111 - We have switched geoip data sources. Previously we shipped IP-to-
2112 country mappings from Maxmind's GeoLite2, but in 2019 they changed
2113 their licensing terms, so we were unable to update them after that
2114 point. We now ship geoip files based on the IPFire Location
2115 Database instead. (See https://location.ipfire.org/ for more
2116 information). This release updates our geoip files to match the
2117 IPFire Location Database as retrieved on 2021/03/12. Closes
2120 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
2121 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
2122 Closes ticket 40309.
2125 Changes in version 0.4.5.7 - 2021-03-16
2126 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
2129 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
2130 who can send directory data to a Tor instance to force that Tor
2131 instance to consume huge amounts of CPU. This is easiest to exploit
2132 against authorities, since anybody can upload to them, but directory
2133 caches could also exploit this vulnerability against relays or clients
2134 when they download. The other vulnerability (TROVE-2021-002) only
2135 affects directory authorities, and would allow an attacker to remotely
2136 crash the authority with an assertion failure. Patches have already
2137 been provided to the authority operators, to help ensure
2140 We recommend that everybody upgrade to one of the releases that fixes
2141 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
2144 This release also updates our GeoIP data source, and fixes a few
2145 smaller bugs in earlier releases.
2147 o Major bugfixes (security, denial of service):
2148 - Disable the dump_desc() function that we used to dump unparseable
2149 information to disk. It was called incorrectly in several places,
2150 in a way that could lead to excessive CPU usage. Fixes bug 40286;
2151 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
2152 001 and CVE-2021-28089.
2153 - Fix a bug in appending detached signatures to a pending consensus
2154 document that could be used to crash a directory authority. Fixes
2155 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
2158 o Minor features (geoip data):
2159 - We have switched geoip data sources. Previously we shipped IP-to-
2160 country mappings from Maxmind's GeoLite2, but in 2019 they changed
2161 their licensing terms, so we were unable to update them after that
2162 point. We now ship geoip files based on the IPFire Location
2163 Database instead. (See https://location.ipfire.org/ for more
2164 information). This release updates our geoip files to match the
2165 IPFire Location Database as retrieved on 2021/03/12. Closes
2168 o Minor bugfixes (directory authority):
2169 - Now that exit relays don't allow exit connections to directory
2170 authority DirPorts (to prevent network reentry), disable
2171 authorities' reachability self test on the DirPort. Fixes bug
2172 40287; bugfix on 0.4.5.5-rc.
2174 o Minor bugfixes (documentation):
2175 - Fix a formatting error in the documentation for
2176 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
2178 o Minor bugfixes (Linux, relay):
2179 - Fix a bug in determining total available system memory that would
2180 have been triggered if the format of Linux's /proc/meminfo file
2181 had ever changed to include "MemTotal:" in the middle of a line.
2182 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
2184 o Minor bugfixes (metrics port):
2185 - Fix a BUG() warning on the MetricsPort for an internal missing
2186 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
2188 o Minor bugfixes (onion service):
2189 - Remove a harmless BUG() warning when reloading tor configured with
2190 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
2192 o Minor bugfixes (portability):
2193 - Fix a non-portable usage of "==" with "test" in the configure
2194 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
2196 o Minor bugfixes (relay):
2197 - Remove a spammy log notice falsely claiming that the IPv4/v6
2198 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
2199 - Do not query the address cache early in the boot process when
2200 deciding if a relay needs to fetch early directory information
2201 from an authority. This bug resulted in a relay falsely believing
2202 it didn't have an address and thus triggering an authority fetch
2203 at each boot. Related to our fix for 40300.
2205 o Removed features (mallinfo deprecated):
2206 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
2207 Closes ticket 40309.
2210 Changes in version 0.4.5.6 - 2021-02-15
2211 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
2212 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
2213 Karsten is best known for creating the Tor metrics portal and leading
2214 the metrics team, but he was involved in Tor from the early days. For
2215 example, while he was still a student he invented and implemented the
2216 v2 onion service directory design, and he also served as an ambassador
2217 to the many German researchers working in the anonymity field. We
2218 loved him and respected him for his patience, his consistency, and his
2219 welcoming approach to growing our community.
2221 This release series introduces significant improvements in relay IPv6
2222 address discovery, a new "MetricsPort" mechanism for relay operators
2223 to measure performance, LTTng support, build system improvements to
2224 help when using Tor as a static library, and significant bugfixes
2225 related to Windows relay performance. It also includes numerous
2226 smaller features and bugfixes.
2228 Below are the changes since 0.4.4.4-rc. For a complete list of changes
2229 since 0.4.4.7, see the ReleaseNotes file.
2231 o Major bugfixes (IPv6, relay):
2232 - Fix a bug that prevented a relay from publishing its descriptor if
2233 an auto-discovered IPv6 that was found unreachable. Fixes bug
2234 40279; bugfix on 0.4.5.1-alpha.
2236 o Minor features (protocol versions):
2237 - Stop claiming to support the "DirCache=1" subprotocol version.
2238 Technically, we stopped supporting this subprotocol back in
2239 0.4.5.1-alpha, but we needed to wait for the authorities to stop
2240 listing it as "required" before we could drop it from the list.
2241 Closes ticket 40221.
2243 o Minor bugfixes (logging):
2244 - Avoid a spurious log message about missing subprotocol versions,
2245 when the consensus that we're reading from is older than the
2246 current release. Previously we had made this message nonfatal, but
2247 in practice, it is never relevant when the consensus is older than
2248 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
2250 o Minor bugfixes (metrics port):
2251 - Fix a bug warning when a metrics port socket was unexpectedly
2252 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
2254 o Minor bugfixes (relay):
2255 - Allow relays to have a RFC1918 address if PublishServerDescriptor
2256 is set to 0 and AssumeReachable is set to 1. This is to support
2257 the use case of a bridge on a local network, exposed via a
2258 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
2260 o Minor bugfixes (relay, config):
2261 - Fix a problem in the removal of duplicate ORPorts from the
2262 internal port list when loading the config file. We were removing
2263 the wrong ports, breaking valid torrc uses cases for multiple
2264 ORPorts of the same address family. Fixes bug 40289; bugfix
2268 Changes in version 0.4.4.7 - 2021-02-03
2269 Tor 0.4.4.7 backports numerous bugfixes from later releases,
2270 including one that made v3 onion services more susceptible to
2271 denial-of-service attacks, and a feature that makes some kinds of
2272 DoS attacks harder to perform.
2274 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
2275 - Stop requiring a live consensus for v3 clients and services, and
2276 allow a "reasonably live" consensus instead. This allows v3 onion
2277 services to work even if the authorities fail to generate a
2278 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2281 o Major feature (exit, backport from 0.4.5.5-rc):
2282 - Re-entry into the network is now denied at the Exit level to all
2283 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2284 should help mitgate a set of denial-of-service attacks. Closes
2287 o Minor feature (build system, backport from 0.4.5.4-rc):
2288 - New "make lsp" command to generate the compile_commands.json file
2289 used by the ccls language server. The "bear" program is needed for
2290 this. Closes ticket 40227.
2292 o Minor features (compilation, backport from 0.4.5.2-rc):
2293 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2294 later. There are a number of APIs newly deprecated in OpenSSL
2295 3.0.0 that Tor still requires. (A later version of Tor will try to
2296 stop depending on these APIs.) Closes ticket 40165.
2298 o Minor features (crypto, backport from 0.4.5.3-rc):
2299 - Fix undefined behavior on our Keccak library. The bug only
2300 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2301 and would result in wrong digests. Fixes bug 40210; bugfix on
2302 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2303 weasel for diagnosing this.
2305 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
2306 - Strip '\r' characters when reading text files on Unix platforms.
2307 This should resolve an issue where a relay operator migrates a
2308 relay from Windows to Unix, but does not change the line ending of
2309 Tor's various state files to match the platform, and the CRLF line
2310 endings from Windows end up leaking into other files such as the
2311 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2313 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
2314 - Fix a compilation warning about unreachable fallthrough
2315 annotations when building with "--enable-all-bugs-are-fatal" on
2316 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2318 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
2319 - Handle partial SOCKS5 messages correctly. Previously, our code
2320 would send an incorrect error message if it got a SOCKS5 request
2321 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2323 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
2324 - Fix the `config/parse_tcp_proxy_line` test so that it works
2325 correctly on systems where the DNS provider hijacks invalid
2326 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2327 - Fix our Python reference-implementation for the v3 onion service
2328 handshake so that it works correctly with the version of hashlib
2329 provided by Python 3.9. Fixes part of bug 40179; bugfix
2331 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2332 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2335 Changes in version 0.4.3.8 - 2021-02-03
2336 Tor 0.4.3.8 backports numerous bugfixes from later releases,
2337 including one that made v3 onion services more susceptible to
2338 denial-of-service attacks, and a feature that makes some kinds of
2339 DoS attacks harder to perform.
2341 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
2342 which will reach end-of-life on 15 Feb 2021.
2344 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
2345 - Stop requiring a live consensus for v3 clients and services, and
2346 allow a "reasonably live" consensus instead. This allows v3 onion
2347 services to work even if the authorities fail to generate a
2348 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2351 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
2352 - Fix a bug where we were undercounting the Tor network's total
2353 onion service traffic, by ignoring any traffic originating from
2354 clients. Now we count traffic from both clients and services.
2355 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2357 o Major feature (exit, backport from 0.4.5.5-rc):
2358 - Re-entry into the network is now denied at the Exit level to all
2359 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2360 should help mitgate a set of denial-of-service attacks. Closes
2363 o Minor feature (build system, backport from 0.4.5.4-rc):
2364 - New "make lsp" command to generate the compile_commands.json file
2365 used by the ccls language server. The "bear" program is needed for
2366 this. Closes ticket 40227.
2368 o Minor features (compilation, backport from 0.4.5.2-rc):
2369 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2370 later. There are a number of APIs newly deprecated in OpenSSL
2371 3.0.0 that Tor still requires. (A later version of Tor will try to
2372 stop depending on these APIs.) Closes ticket 40165.
2374 o Minor features (crypto, backport from 0.4.5.3-rc):
2375 - Fix undefined behavior on our Keccak library. The bug only
2376 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2377 and would result in wrong digests. Fixes bug 40210; bugfix on
2378 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2379 weasel for diagnosing this.
2381 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
2382 - Strip '\r' characters when reading text files on Unix platforms.
2383 This should resolve an issue where a relay operator migrates a
2384 relay from Windows to Unix, but does not change the line ending of
2385 Tor's various state files to match the platform, and the CRLF line
2386 endings from Windows end up leaking into other files such as the
2387 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2389 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
2390 - Resolve a compilation warning that could occur in
2391 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2393 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
2394 - Fix a compilation warning about unreachable fallthrough
2395 annotations when building with "--enable-all-bugs-are-fatal" on
2396 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2398 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
2399 - Handle partial SOCKS5 messages correctly. Previously, our code
2400 would send an incorrect error message if it got a SOCKS5 request
2401 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2403 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
2404 - Fix the `config/parse_tcp_proxy_line` test so that it works
2405 correctly on systems where the DNS provider hijacks invalid
2406 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2407 - Fix our Python reference-implementation for the v3 onion service
2408 handshake so that it works correctly with the version of hashlib
2409 provided by Python 3.9. Fixes part of bug 40179; bugfix
2411 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2412 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2415 Changes in version 0.3.5.13 - 2020-02-03
2416 Tor 0.3.5.13 backports numerous bugfixes from later releases,
2417 including one that made v3 onion services more susceptible to
2418 denial-of-service attacks, and a feature that makes some kinds of
2419 DoS attacks harder to perform.
2421 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
2422 - Stop requiring a live consensus for v3 clients and services, and
2423 allow a "reasonably live" consensus instead. This allows v3 onion
2424 services to work even if the authorities fail to generate a
2425 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2428 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
2429 - Fix a bug where we were undercounting the Tor network's total
2430 onion service traffic, by ignoring any traffic originating from
2431 clients. Now we count traffic from both clients and services.
2432 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2434 o Major feature (exit, backport from 0.4.5.5-rc):
2435 - Re-entry into the network is now denied at the Exit level to all
2436 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2437 should help mitigate a set of denial-of-service attacks. Closes
2440 o Minor feature (build system, backport from 0.4.5.4-rc):
2441 - New "make lsp" command to generate the compile_commands.json file
2442 used by the ccls language server. The "bear" program is needed for
2443 this. Closes ticket 40227.
2445 o Minor features (compilation, backport from 0.4.5.2-rc):
2446 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2447 later. There are a number of APIs newly deprecated in OpenSSL
2448 3.0.0 that Tor still requires. (A later version of Tor will try to
2449 stop depending on these APIs.) Closes ticket 40165.
2451 o Minor features (crypto, backport from 0.4.5.3-rc):
2452 - Fix undefined behavior on our Keccak library. The bug only
2453 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2454 and would result in wrong digests. Fixes bug 40210; bugfix on
2455 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2456 weasel for diagnosing this.
2458 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
2459 - Strip '\r' characters when reading text files on Unix platforms.
2460 This should resolve an issue where a relay operator migrates a
2461 relay from Windows to Unix, but does not change the line ending of
2462 Tor's various state files to match the platform, and the CRLF line
2463 endings from Windows end up leaking into other files such as the
2464 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2466 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
2467 - Resolve a compilation warning that could occur in
2468 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2470 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
2471 - Fix a compilation warning about unreachable fallthrough
2472 annotations when building with "--enable-all-bugs-are-fatal" on
2473 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2475 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
2476 - Handle partial SOCKS5 messages correctly. Previously, our code
2477 would send an incorrect error message if it got a SOCKS5 request
2478 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2480 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
2481 - Fix our Python reference-implementation for the v3 onion service
2482 handshake so that it works correctly with the version of hashlib
2483 provided by Python 3.9. Fixes part of bug 40179; bugfix
2485 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2486 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2489 Changes in version 0.4.5.5-rc - 2021-02-01
2490 Tor 0.4.5.5-rc is the third release candidate in its series. We're
2491 coming closer and closer to a stable release series. This release
2492 fixes an annoyance with address detection code, and somewhat mitigates
2493 an ongoing denial-of-service attack.
2495 We anticipate no more code changes between this and the stable
2496 release, though of course that could change.
2498 o Major feature (exit):
2499 - Re-entry into the network is now denied at the Exit level to all
2500 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2501 should help mitgate a set of denial-of-service attacks. Closes
2504 o Minor bugfixes (relay, configuration):
2505 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
2506 for it can be found in the configuration. Fixes bug 40254; bugfix
2510 Changes in version 0.4.5.4-rc - 2021-01-22
2511 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
2512 several bugs present in previous releases.
2514 We expect that the stable release will be the same, or almost the
2515 same, as this release candidate, unless serious bugs are found.
2517 o Major bugfixes (authority, IPv6):
2518 - Do not consider multiple relays in the same IPv6 /64 network to be
2519 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
2521 o Major bugfixes (directory cache, performance, windows):
2522 - Limit the number of items in the consensus diff cache to 64 on
2523 Windows. We hope this will mitigate an issue where Windows relay
2524 operators reported Tor using 100% CPU, while we investigate better
2525 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
2527 o Minor feature (build system):
2528 - New "make lsp" command to generate the compile_commands.json file
2529 used by the ccls language server. The "bear" program is needed for
2530 this. Closes ticket 40227.
2532 o Minor features (authority, logging):
2533 - Log more information for directory authority operators during the
2534 consensus voting process, and while processing relay descriptors.
2535 Closes ticket 40245.
2536 - Reject obsolete router/extrainfo descriptors earlier and more
2537 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
2540 o Minor bugfixes (compilation):
2541 - Fix another warning about unreachable fallthrough annotations when
2542 building with "--enable-all-bugs-are-fatal" on some compilers.
2543 Fixes bug 40241; bugfix on 0.4.5.3-rc.
2544 - Change the linker flag ordering in our library search code so that
2545 it works for compilers that need the libraries to be listed in the
2546 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
2548 o Minor bugfixes (config, bridge):
2549 - Don't initiate a connection to a bridge configured to use a
2550 missing transport. This change reverts an earlier fix that would
2551 try to avoid such situations during configuration chcecking, but
2552 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
2555 o Minor bugfixes (onion services):
2556 - Avoid a non-fatal assertion in certain edge-cases when
2557 establishing a circuit to an onion service. Fixes bug 32666;
2558 bugfix on 0.3.0.3-alpha.
2560 o Minor bugfixes (relay):
2561 - If we were unable to build our descriptor, don't mark it as having
2562 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
2563 bugfix on 0.4.5.1-alpha.
2566 Changes in version 0.4.5.3-rc - 2021-01-12
2567 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
2568 several bugs, including one that broke onion services on certain older
2569 ARM CPUs, and another that made v3 onion services less reliable.
2571 Though we anticipate that we'll be doing a bit more clean-up between
2572 now and the stable release, we expect that our remaining changes will
2573 be fairly simple. There will be at least one more release candidate
2574 before 0.4.5.x is stable.
2576 o Major bugfixes (onion service v3):
2577 - Stop requiring a live consensus for v3 clients and services, and
2578 allow a "reasonably live" consensus instead. This allows v3 onion
2579 services to work even if the authorities fail to generate a
2580 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2583 o Minor features (crypto):
2584 - Fix undefined behavior on our Keccak library. The bug only
2585 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2586 and would result in wrong digests. Fixes bug 40210; bugfix on
2587 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2588 weasel for diagnosing this.
2590 o Minor features (documentation):
2591 - Mention the "!badexit" directive that can appear in an authority's
2592 approved-routers file, and update the description of the
2593 "!invalid" directive. Closes ticket 40188.
2595 o Minor bugfixes (compilation):
2596 - Fix a compilation warning about unreachable fallthrough
2597 annotations when building with "--enable-all-bugs-are-fatal" on
2598 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2599 - Fix the "--enable-static-tor" switch to properly set the "-static"
2600 compile option onto the tor binary only. Fixes bug 40111; bugfix
2603 o Minor bugfixes (config, bridge):
2604 - Really fix the case where torrc has a missing ClientTransportPlugin
2605 but is configured with a Bridge line and UseBridges. Previously,
2606 we didn't look at the managed proxy list and thus would fail for
2607 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
2609 o Minor bugfixes (logging, relay):
2610 - Log our address as reported by the directory authorities, if none
2611 was configured or detected before. Fixes bug 40201; bugfix
2613 - When a launching bandwidth testing circuit, don't incorrectly call
2614 it a reachability test, or trigger a "CHECKING_REACHABILITY"
2615 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
2617 o Minor bugfixes (relay, statistics):
2618 - Report the correct connection statistics in our extrainfo
2619 documents. Previously there was a problem in the file loading
2620 function which would wrongly truncate a state file, causing the
2621 wrong information to be reported. Fixes bug 40226; bugfix
2624 o Minor bugfixes (SOCKS5):
2625 - Handle partial SOCKS5 messages correctly. Previously, our code
2626 would send an incorrect error message if it got a SOCKS5 request
2627 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2630 Changes in version 0.4.5.2-alpha - 2020-11-23
2631 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
2632 It fixes several bugs present in earlier releases, including one that
2633 made it impractical to run relays on Windows. It also adds a few small
2634 safety features to improve Tor's behavior in the presence of strange
2635 compile-time options, misbehaving proxies, and future versions
2638 o Major bugfixes (relay, windows):
2639 - Fix a bug in our implementation of condition variables on Windows.
2640 Previously, a relay on Windows would use 100% CPU after running
2641 for some time. Because of this change, Tor now require Windows
2642 Vista or later to build and run. Fixes bug 30187; bugfix on
2643 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
2644 the introduction of consensus diffs.) Patch by Daniel Pinto.
2646 o Minor features (compilation):
2647 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2648 later. There are a number of APIs newly deprecated in OpenSSL
2649 3.0.0 that Tor still requires. (A later version of Tor will try to
2650 stop depending on these APIs.) Closes ticket 40165.
2652 o Minor features (protocol, proxy support, defense in depth):
2653 - Respond more deliberately to misbehaving proxies that leave
2654 leftover data on their connections, so as to make Tor even less
2655 likely to allow the proxies to pass their data off as having come
2656 from a relay. Closes ticket 40017.
2658 o Minor features (safety):
2659 - Log a warning at startup if Tor is built with compile-time options
2660 that are likely to make it less stable or reliable. Closes
2663 o Minor bugfixes (circuit, handshake):
2664 - In the v3 handshaking code, use connection_or_change_state() to
2665 change the state. Previously, we changed the state directly, but
2666 this did not pass the state change to the pubsub or channel
2667 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
2668 0.2.3.6-alpha. Patch by Neel Chauhan.
2670 o Minor bugfixes (compilation):
2671 - Use the correct 'ranlib' program when building libtor.a.
2672 Previously we used the default ranlib, which broke some kinds of
2673 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
2674 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
2675 bugfix on 0.4.5.1-alpha.
2676 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
2677 attempt to build. Linux supports that macro but not the BSDs.
2678 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
2680 o Minor bugfixes (configuration):
2681 - Exit Tor on a misconfiguration when the Bridge line is configured
2682 to use a transport but no corresponding ClientTransportPlugin can
2683 be found. Prior to this fix, Tor would attempt to connect to the
2684 bridge directly without using the transport, making it easier for
2685 adversaries to notice the bridge. Fixes bug 25528; bugfix
2687 - Fix an issue where an ORPort was compared with other kinds of
2688 ports, when it should have been only checked against other
2689 ORPorts. This bug would lead to "DirPort auto" getting ignored.
2690 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
2691 - Fix a bug where a second non-ORPort with a variant family (ex:
2692 SocksPort [::1]:9050) would be ignored due to a configuration
2693 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
2695 o Minor bugfixes (crash, relay, signing key):
2696 - Avoid assertion failures when we run Tor from the command line
2697 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
2698 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
2700 o Minor bugfixes (logging):
2701 - Remove trailing whitespace from control event log messages. Fixes
2702 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
2704 - Turn warning-level log message about SENDME failure into a debug-
2705 level message. (This event can happen naturally, and is no reason
2706 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
2708 o Minor bugfixes (relay, address discovery):
2709 - Don't trigger an IP change when no new valid IP can be found.
2710 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
2711 - When attempting to discover our IP, use a simple test circuit,
2712 rather than a descriptor fetch: the same address information is
2713 present in NETINFO cells, and is better authenticated there. Fixes
2714 bug 40071; bugfix on 0.4.5.1-alpha.
2716 o Minor bugfixes (testing):
2717 - Fix the `config/parse_tcp_proxy_line` test so that it works
2718 correctly on systems where the DNS provider hijacks invalid
2719 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2720 - Fix unit tests that used newly generated list of routers so that
2721 they check them with respect to the date when they were generated,
2722 not with respect to the current time. Fixes bug 40187; bugfix
2724 - Fix our Python reference-implementation for the v3 onion service
2725 handshake so that it works correctly with the version of hashlib
2726 provided by Python 3.9. Fixes part of bug 40179; bugfix
2728 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2729 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2731 o Removed features (controller):
2732 - Remove the "GETINFO network-status" controller command. It has
2733 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
2736 Changes in version 0.4.4.6 - 2020-11-12
2737 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
2738 backports fixes from later releases, including a fix for TROVE-2020-
2739 005, a security issue that could be used, under certain cases, by an
2740 adversary to observe traffic patterns on a limited number of circuits
2741 intended for a different relay.
2743 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2744 - When completing a channel, relays now check more thoroughly to
2745 make sure that it matches any pending circuits before attaching
2746 those circuits. Previously, address correctness and Ed25519
2747 identities were not checked in this case, but only when extending
2748 circuits on an existing channel. Fixes bug 40080; bugfix on
2749 0.2.7.2-alpha. Resolves TROVE-2020-005.
2751 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
2752 - Authorities now list a different set of protocols as required and
2753 recommended. These lists have been chosen so that only truly
2754 recommended and/or required protocols are included, and so that
2755 clients using 0.2.9 or later will continue to work (even though
2756 they are not supported), whereas only relays running 0.3.5 or
2757 later will meet the requirements. Closes ticket 40162.
2758 - Make it possible to specify multiple ConsensusParams torrc lines.
2759 Now directory authority operators can for example put the main
2760 ConsensusParams config in one torrc file and then add to it from a
2761 different torrc file. Closes ticket 40164.
2763 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2764 - Tor no longer allows subprotocol versions larger than 63.
2765 Previously version numbers up to UINT32_MAX were allowed, which
2766 significantly complicated our code. Implements proposal 318;
2767 closes ticket 40133.
2769 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2770 - Fix a rendezvous cache unit test that was triggering an underflow
2771 on the global rend cache allocation. Fixes bug 40125; bugfix
2773 - Fix another rendezvous cache unit test that was triggering an
2774 underflow on the global rend cache allocation. Fixes bug 40126;
2775 bugfix on 0.2.8.1-alpha.
2777 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
2778 - Fix compiler warnings that would occur when building with
2779 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2780 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2781 - Resolve a compilation warning that could occur in
2782 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2784 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2785 - Remove a debug logging statement that uselessly spammed the logs.
2786 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2788 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2789 - Avoid a fatal assert() when failing to create a listener
2790 connection for an address that was in use. Fixes bug 40073; bugfix
2793 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2794 - For HSFETCH commands on v2 onion services addresses, check the
2795 length of bytes decoded, not the base32 length. Fixes bug 34400;
2796 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2799 Changes in version 0.4.3.7 - 2020-11-12
2800 Tor 0.4.3.7 backports several bugfixes from later releases. It
2801 includes a fix for TROVE-2020-005, a security issue that could be
2802 used, under certain cases, by an adversary to observe traffic patterns
2803 on a limited number of circuits intended for a different relay.
2805 Please be aware that support for the 0.4.3.x series will end on 15
2806 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
2807 downgrade to 0.3.5.x, which will be supported until at least 1
2810 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2811 - Replace the 148 fallback directories originally included in Tor
2812 0.4.1.4-rc (of which around 105 are still functional) with a list
2813 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2815 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2816 - When completing a channel, relays now check more thoroughly to
2817 make sure that it matches any pending circuits before attaching
2818 those circuits. Previously, address correctness and Ed25519
2819 identities were not checked in this case, but only when extending
2820 circuits on an existing channel. Fixes bug 40080; bugfix on
2821 0.2.7.2-alpha. Resolves TROVE-2020-005.
2823 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2824 - When running with NSS enabled, make sure that NSS knows to expect
2825 nonblocking sockets. Previously, we set our TCP sockets as
2826 nonblocking, but did not tell NSS, which in turn could lead to
2827 unexpected blocking behavior. Fixes bug 40035; bugfix
2830 o Minor features (security, backport from 0.4.4.4-rc):
2831 - Channels using obsolete versions of the Tor link protocol are no
2832 longer allowed to circumvent address-canonicity checks. (This is
2833 only a minor issue, since such channels have no way to set ed25519
2834 keys, and therefore should always be rejected for circuits that
2835 specify ed25519 identities.) Closes ticket 40081.
2837 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2838 - Tor no longer allows subprotocol versions larger than 63.
2839 Previously version numbers up to UINT32_MAX were allowed, which
2840 significantly complicated our code. Implements proposal 318;
2841 closes ticket 40133.
2843 o Minor features (tests, backport from 0.4.4.5):
2844 - Our "make check" target now runs the unit tests in 8 parallel
2845 chunks. Doing this speeds up hardened CI builds by more than a
2846 factor of two. Closes ticket 40098.
2848 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2849 - Fix a rendezvous cache unit test that was triggering an underflow
2850 on the global rend cache allocation. Fixes bug 40125; bugfix
2852 - Fix another rendezvous cache unit test that was triggering an
2853 underflow on the global rend cache allocation. Fixes bug 40126;
2854 bugfix on 0.2.8.1-alpha.
2856 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2857 - Fix a correctness bug that could cause an assertion failure if we
2858 ever tried using the buf_move_all() function with an empty input
2859 buffer. As far as we know, no released versions of Tor do this.
2860 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2862 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2863 - Remove a debug logging statement that uselessly spammed the logs.
2864 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2866 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2867 - On a bridge, treat all connections from an ExtORPort as remote by
2868 default for the purposes of rate-limiting. Previously, bridges
2869 would treat the connection as local unless they explicitly
2870 received a "USERADDR" command. ExtORPort connections still count
2871 as local if there is a USERADDR command with an explicit local
2872 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2874 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2875 - Avoid a fatal assert() when failing to create a listener
2876 connection for an address that was in use. Fixes bug 40073; bugfix
2879 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2880 - Adjust the rules for when to warn about having too many
2881 connections to other relays. Previously we'd tolerate up to 1.5
2882 connections per relay on average. Now we tolerate more connections
2883 for directory authorities, and raise the number of total
2884 connections we need to see before we warn. Fixes bug 33880; bugfix
2887 o Minor bugfixes (tests, 0.4.4.5):
2888 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2889 on its own. Previously, it would exit with an error. Fixes bug
2890 40099; bugfix on 0.2.8.1-alpha.
2892 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2893 - For HSFETCH commands on v2 onion services addresses, check the
2894 length of bytes decoded, not the base32 length. Fixes bug 34400;
2895 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2897 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2898 - Fix a bug that prevented Tor from starting if its log file grew
2899 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2901 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2902 - Add a deprecation warning for version 2 onion services. Closes
2905 o Removed features (backport from 0.4.4.3-alpha):
2906 - Our "check-local" test target no longer tries to use the
2907 Coccinelle semantic patching tool parse all the C files. While it
2908 is a good idea to try to make sure Coccinelle works on our C
2909 before we run a Coccinelle patch, doing so on every test run has
2910 proven to be disruptive. You can still run this tool manually with
2911 "make check-cocci". Closes ticket 40030. ticket 40030.
2914 Changes in version 0.3.5.12 - 2020-11-12
2915 Tor 0.4.3.7 backports several bugfixes from later releases. It
2916 includes a fix for TROVE-2020-005, a security issue that could be
2917 used, under certain cases, by an adversary to observe traffic patterns
2918 on a limited number of circuits intended for a different relay.
2920 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2921 - Replace the 148 fallback directories originally included in Tor
2922 0.4.1.4-rc (of which around 105 are still functional) with a list
2923 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2925 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2926 - When completing a channel, relays now check more thoroughly to
2927 make sure that it matches any pending circuits before attaching
2928 those circuits. Previously, address correctness and Ed25519
2929 identities were not checked in this case, but only when extending
2930 circuits on an existing channel. Fixes bug 40080; bugfix on
2931 0.2.7.2-alpha. Resolves TROVE-2020-005.
2933 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2934 - When running with NSS enabled, make sure that NSS knows to expect
2935 nonblocking sockets. Previously, we set our TCP sockets as
2936 nonblocking, but did not tell NSS, which in turn could lead to
2937 unexpected blocking behavior. Fixes bug 40035; bugfix
2940 o Minor features (security, backport from 0.4.4.4-rc):
2941 - Channels using obsolete versions of the Tor link protocol are no
2942 longer allowed to circumvent address-canonicity checks. (This is
2943 only a minor issue, since such channels have no way to set ed25519
2944 keys, and therefore should always be rejected for circuits that
2945 specify ed25519 identities.) Closes ticket 40081.
2947 o Minor features (debugging, directory system):
2948 - Don't crash when we find a non-guard with a guard-fraction value
2949 set. Instead, log a bug warning, in an attempt to figure out how
2950 this happened. Diagnostic for ticket 32868.
2952 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2953 - Tor no longer allows subprotocol versions larger than 63.
2954 Previously version numbers up to UINT32_MAX were allowed, which
2955 significantly complicated our code. Implements proposal 318;
2956 closes ticket 40133.
2958 o Minor features (tests, backport from 0.4.4.5):
2959 - Our "make check" target now runs the unit tests in 8 parallel
2960 chunks. Doing this speeds up hardened CI builds by more than a
2961 factor of two. Closes ticket 40098.
2963 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2964 - Fix a rendezvous cache unit test that was triggering an underflow
2965 on the global rend cache allocation. Fixes bug 40125; bugfix
2967 - Fix another rendezvous cache unit test that was triggering an
2968 underflow on the global rend cache allocation. Fixes bug 40126;
2969 bugfix on 0.2.8.1-alpha.
2971 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2972 - Fix a correctness bug that could cause an assertion failure if we
2973 ever tried using the buf_move_all() function with an empty input
2974 buffer. As far as we know, no released versions of Tor do this.
2975 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2977 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2978 - Remove a debug logging statement that uselessly spammed the logs.
2979 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2981 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2982 - On a bridge, treat all connections from an ExtORPort as remote by
2983 default for the purposes of rate-limiting. Previously, bridges
2984 would treat the connection as local unless they explicitly
2985 received a "USERADDR" command. ExtORPort connections still count
2986 as local if there is a USERADDR command with an explicit local
2987 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2989 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2990 - Avoid a fatal assert() when failing to create a listener
2991 connection for an address that was in use. Fixes bug 40073; bugfix
2994 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2995 - Adjust the rules for when to warn about having too many
2996 connections to other relays. Previously we'd tolerate up to 1.5
2997 connections per relay on average. Now we tolerate more connections
2998 for directory authorities, and raise the number of total
2999 connections we need to see before we warn. Fixes bug 33880; bugfix
3002 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3003 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3004 descriptors, when the IPv6 port was configured as "auto". Fixes
3005 bug 32588; bugfix on 0.2.3.9-alpha.
3007 o Minor bugfixes (tests, 0.4.4.5):
3008 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
3009 on its own. Previously, it would exit with an error. Fixes bug
3010 40099; bugfix on 0.2.8.1-alpha.
3012 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
3013 - Fix a bug that prevented Tor from starting if its log file grew
3014 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
3016 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
3017 - Add a deprecation warning for version 2 onion services. Closes
3021 Changes in version 0.4.5.1-alpha - 2020-11-01
3022 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
3023 improves support for IPv6, address discovery and self-testing, code
3024 metrics and tracing.
3026 This release also fixes TROVE-2020-005, a security issue that could be
3027 used, under certain cases, by an adversary to observe traffic patterns
3028 on a limited number of circuits intended for a different relay. To
3029 mount this attack, the adversary would need to actively extend
3030 circuits to an incorrect address, as well as compromise a relay's
3031 legacy RSA-1024 key. We'll be backporting this fix to other release
3032 series soon, after it has had some testing.
3034 Here are the changes since 0.4.4.5.
3036 o Major features (build):
3037 - When building Tor, first link all object files into a single
3038 static library. This may help with embedding Tor in other
3039 programs. Note that most Tor functions do not constitute a part of
3040 a stable or supported API: only those functions in tor_api.h
3041 should be used if embedding Tor. Closes ticket 40127.
3043 o Major features (metrics):
3044 - Introduce a new MetricsPort which exposes, through an HTTP
3045 interface, a series of metrics that tor collects at runtime. At
3046 the moment, the only supported output format is Prometheus data
3047 model. Closes ticket 40063. See the manual page for more
3048 information and security considerations.
3049 o Major features (relay, IPv6):
3050 - The torrc option Address now supports IPv6. This unifies our
3051 address discovery interface to support IPv4, IPv6, and hostnames.
3052 Closes ticket 33233.
3053 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
3054 bridges. Closes ticket 33222.
3055 - Relays now automatically bind on IPv6 for their ORPort, unless
3056 specified otherwise with the IPv4Only flag. Closes ticket 33246.
3057 - When a relay with IPv6 support is told to open a connection to
3058 another relay, and the extend cell lists both IPv4 and IPv6
3059 addresses, the first relay now picks randomly which address to
3060 use. Closes ticket 33220.
3061 - Relays now track their IPv6 ORPort reachability separately from
3062 the reachability of their IPv4 ORPort. They will not publish a
3063 descriptor unless _both_ ports appear to be externally reachable.
3064 Closes ticket 34067.
3066 o Major features (tracing):
3067 - Add event-tracing library support for USDT and LTTng-UST, and a
3068 few tracepoints in the circuit subsystem. More will come
3069 incrementally. This feature is compiled out by default: it needs
3070 to be enabled at configure time. See documentation in
3071 doc/HACKING/Tracing.md. Closes ticket 32910.
3073 o Major bugfixes (security):
3074 - When completing a channel, relays now check more thoroughly to
3075 make sure that it matches any pending circuits before attaching
3076 those circuits. Previously, address correctness and Ed25519
3077 identities were not checked in this case, but only when extending
3078 circuits on an existing channel. Fixes bug 40080; bugfix on
3079 0.2.7.2-alpha. Resolves TROVE-2020-005.
3081 o Major bugfixes (TLS, buffer):
3082 - When attempting to read N bytes on a TLS connection, really try to
3083 read all N bytes. Previously, Tor would stop reading after the
3084 first TLS record, which can be smaller than the N bytes requested,
3085 and not check for more data until the next mainloop event. Fixes
3086 bug 40006; bugfix on 0.1.0.5-rc.
3088 o Minor features (address discovery):
3089 - If no Address statements are found, relays now prioritize guessing
3090 their address by looking at the local interface instead of the
3091 local hostname. If the interface address can't be found, the local
3092 hostname is used. Closes ticket 33238.
3094 o Minor features (admin tools):
3095 - Add a new --format argument to -key-expiration option to allow
3096 specifying the time format of the expiration date. Adds Unix
3097 timestamp format support. Patch by Daniel Pinto. Closes
3100 o Minor features (bootstrap reporting):
3101 - When reporting bootstrapping status on a relay, do not consider
3102 connections that have never been the target of an origin circuit.
3103 Previously, all connection failures were treated as potential
3104 bootstrapping failures, including connections that had been opened
3105 because of client requests. Closes ticket 25061.
3107 o Minor features (build):
3108 - When running the configure script, try to detect version
3109 mismatches between the OpenSSL headers and libraries, and suggest
3110 that the user should try "--with-openssl-dir". Closes 40138.
3111 - If the configure script has given any warnings, remind the user
3112 about them at the end of the script. Related to 40138.
3114 o Minor features (configuration):
3115 - Allow using wildcards (* and ?) with the %include option on
3116 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
3117 - Allow the configuration options EntryNodes, ExcludeNodes,
3118 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
3119 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
3120 Patch by Daniel Pinto.
3122 o Minor features (control port):
3123 - Add a DROPTIMEOUTS command to drop circuit build timeout history
3124 and reset the current timeout. Closes ticket 40002.
3125 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
3126 send a control port event. Closes ticket 32190. Patch by
3128 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
3129 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
3130 onion handshake counts respectively. Closes ticket 28279. Patch by
3133 o Minor features (control port, IPv6):
3134 - Tor relays now try to report to the controller when they are
3135 launching an IPv6 self-test. Closes ticket 34068.
3136 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
3137 control port to fetch the Tor host's respective IPv4 or IPv6
3138 address. We keep "GETINFO address" for backwards-compatibility.
3139 Closes ticket 40039. Patch by Neel Chauhan.
3141 o Minor features (directory authorities):
3142 - Authorities now list a different set of protocols as required and
3143 recommended. These lists have been chosen so that only truly
3144 recommended and/or required protocols are included, and so that
3145 clients using 0.2.9 or later will continue to work (even though
3146 they are not supported), whereas only relays running 0.3.5 or
3147 later will meet the requirements. Closes ticket 40162.
3148 - Add a new consensus method 30 that removes the unnecessary "="
3149 padding from ntor-onion-key. Closes ticket 7869. Patch by
3151 - Directory authorities now reject descriptors from relays running
3152 Tor versions from the obsolete 0.4.1 series. Resolves ticket
3153 34357. Patch by Neel Chauhan.
3154 - Make it possible to specify multiple ConsensusParams torrc lines.
3155 Now directory authority operators can for example put the main
3156 ConsensusParams config in one torrc file and then add to it from a
3157 different torrc file. Closes ticket 40164.
3158 - The AssumeReachable option no longer stops directory authorities
3159 from checking whether other relays are running. A new
3160 AuthDirTestReachability option can be used to disable these
3161 checks. Closes ticket 34445.
3162 - When looking for possible Sybil attacks, also consider IPv6
3163 addresses. Two routers are considered to have "the same" address
3164 by this metric if they are in the same /64 network. Patch from
3165 Maurice Pibouin. Closes ticket 7193.
3167 o Minor features (directory authorities, IPv6):
3168 - Make authorities add their IPv6 ORPort (if any) to the trusted
3169 servers list. Authorities previously added only their IPv4
3170 addresses. Closes ticket 32822.
3172 o Minor features (ed25519, relay):
3173 - Save a relay's base64-encoded ed25519 identity key to the data
3174 directory in a file named fingerprint-ed25519. Closes ticket
3175 30642. Patch by Neel Chauhan.
3177 o Minor features (heartbeat):
3178 - Include the total number of inbound and outbound IPv4 and IPv6
3179 connections in the heartbeat message. Closes ticket 29113.
3181 o Minor features (IPv6, ExcludeNodes):
3182 - Handle IPv6 addresses in ExcludeNodes; previously they were
3183 ignored. Closes ticket 34065. Patch by Neel Chauhan.
3185 o Minor features (logging):
3186 - Add the running glibc version to the log, and the compiled glibc
3187 version to the library list returned when using --library-versions.
3188 Patch from Daniel Pinto. Closes ticket 40047.
3189 - Consider an HTTP 301 response to be an error (like a 404) when
3190 processing a directory response. Closes ticket 40053.
3191 - Log directory fetch statistics as a single line. Closes
3193 - Provide more complete descriptions of our connections when logging
3194 about them. Closes ticket 40041.
3195 - When describing a relay in the logs, we now include its ed25519
3196 identity. Closes ticket 22668.
3198 o Minor features (onion services):
3199 - Only overwrite an onion service's existing hostname file if its
3200 contents are wrong. This enables read-only onion-service
3201 directories. Resolves ticket 40062. Patch by Neel Chauhan.
3203 o Minor features (pluggable transports):
3204 - Add an OutboundBindAddressPT option to allow users to specify
3205 which IPv4 and IPv6 address pluggable transports should use for
3206 outgoing IP packets. Tor does not have a way to enforce that the
3207 pluggable transport honors this option, so each pluggable transport
3208 needs to implement support on its own. Closes ticket 5304.
3210 o Minor features (relay address tracking):
3211 - We now store relay addresses for OR connections in a more logical
3212 way. Previously we would sometimes overwrite the actual address of
3213 a connection with a "canonical address", and then store the "real
3214 address" elsewhere to remember it. We now track the "canonical
3215 address" elsewhere for the cases where we need it, and leave the
3216 connection's address alone. Closes ticket 33898.
3218 o Minor features (relay):
3219 - If a relay is unable to discover its address, attempt to learn it
3220 from the NETINFO cell. Closes ticket 40022.
3221 - Log immediately when launching a relay self-check. Previously we
3222 would try to log before launching checks, or approximately when we
3223 intended to launch checks, but this tended to be error-prone.
3224 Closes ticket 34137.
3226 o Minor features (relay, address discovery):
3227 - If Address option is not found in torrc, attempt to learn our
3228 address with the configured ORPort address if any. Closes
3231 o Minor features (relay, IPv6):
3232 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
3233 reachability. Closes part of ticket 33224.
3234 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
3235 parameters to be used in an emergency to tell relays that they
3236 should publish even if they cannot complete their ORPort self-
3237 checks. Closes ticket 34064 and part of 33224.
3238 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
3239 - Declare support for the Relay=3 subprotocol version. Closes
3241 - When launching IPv6 ORPort self-test circuits, make sure that the
3242 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
3244 o Minor features (specification update):
3245 - Several fields in microdescriptors, router descriptors, and
3246 consensus documents that were formerly optional are now required.
3247 Implements proposal 315; closes ticket 40132.
3249 o Minor features (state management):
3250 - When loading the state file, remove entries from the statefile
3251 that have been obsolete for a long time. Ordinarily Tor preserves
3252 unrecognized entries in order to keep forward-compatibility, but
3253 these entries have not actually been used in any release since
3254 before 0.3.5.x. Closes ticket 40137.
3256 o Minor features (statistics, ipv6):
3257 - Relays now publish IPv6-specific counts of single-direction versus
3258 bidirectional relay connections. Closes ticket 33264.
3259 - Relays now publish their IPv6 read and write statistics over time,
3260 if statistics are enabled. Closes ticket 33263.
3262 o Minor features (subprotocol versions):
3263 - Tor no longer allows subprotocol versions larger than 63.
3264 Previously version numbers up to UINT32_MAX were allowed, which
3265 significantly complicated our code. Implements proposal 318;
3266 closes ticket 40133.
3267 - Use the new limitations on subprotocol versions due to proposal
3268 318 to simplify our implementation. Part of ticket 40133.
3270 o Minor features (testing configuration):
3271 - The TestingTorNetwork option no longer implicitly sets
3272 AssumeReachable to 1. This change allows us to test relays' self-
3273 testing mechanisms, and to test authorities' relay-testing
3274 functionality. Closes ticket 34446.
3276 o Minor features (testing):
3277 - Added unit tests for channel_matches_target_addr_for_extend().
3278 Closes Ticket 33919. Patch by MrSquanchee.
3280 o Minor features (tests, v2 onion services):
3281 - Fix a rendezvous cache unit test that was triggering an underflow
3282 on the global rend cache allocation. Fixes bug 40125; bugfix
3284 - Fix another rendezvous cache unit test that was triggering an
3285 underflow on the global rend cache allocation. Fixes bug 40126;
3286 bugfix on 0.2.8.1-alpha.
3288 o Minor bugfixes (circuit padding):
3289 - When circpad_send_padding_cell_for_callback is called,
3290 `is_padding_timer_scheduled` flag was not reset. Now it is set to
3291 0 at the top of that function. Fixes bug 32671; bugfix
3293 - Add a per-circuit padding machine instance counter, so we can
3294 differentiate between shutdown requests for old machines on a
3295 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
3296 - Add the ability to keep circuit padding machines if they match a
3297 set of circuit states or purposes. This allows us to have machines
3298 that start up under some conditions but don't shut down under
3299 others. We now use this mask to avoid starting up introduction
3300 circuit padding again after the machines have already completed.
3301 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
3303 o Minor bugfixes (compatibility):
3304 - Strip '\r' characters when reading text files on Unix platforms.
3305 This should resolve an issue where a relay operator migrates a
3306 relay from Windows to Unix, but does not change the line ending of
3307 Tor's various state files to match the platform, and the CRLF line
3308 endings from Windows end up leaking into other files such as the
3309 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
3311 o Minor bugfixes (compilation):
3312 - Fix compiler warnings that would occur when building with
3313 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
3314 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
3315 - Resolve a compilation warning that could occur in
3316 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
3318 o Minor bugfixes (configuration):
3319 - Fix bug where %including a pattern ending with */ would include
3320 files and folders (instead of folders only) in versions of glibc <
3321 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
3324 o Minor bugfixes (control port):
3325 - Make sure we send the SOCKS request address in relay begin cells
3326 when a stream is attached with the purpose
3327 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
3328 Patch by Neel Chauhan.
3330 o Minor bugfixes (logging):
3331 - Remove a debug logging statement that uselessly spammed the logs.
3332 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
3333 - When logging a rate-limited message about how many messages have
3334 been suppressed in the last N seconds, give an accurate value for
3335 N, rounded up to the nearest minute. Previously we would report
3336 the size of the rate-limiting interval, regardless of when the
3337 messages started to occur. Fixes bug 19431; bugfix
3340 o Minor bugfixes (relay configuration, crash):
3341 - Avoid a fatal assert() when failing to create a listener
3342 connection for an address that was in use. Fixes bug 40073; bugfix
3345 o Minor bugfixes (rust, protocol versions):
3346 - Declare support for the onion service introduction point denial of
3347 service extensions when building with Rust. Fixes bug 34248;
3348 bugfix on 0.4.2.1-alpha.
3349 - Make Rust protocol version support checks consistent with the
3350 undocumented error behavior of the corresponding C code. Fixes bug
3351 34251; bugfix on 0.3.3.5-rc.
3353 o Minor bugfixes (self-testing):
3354 - When receiving an incoming circuit, only accept it as evidence
3355 that we are reachable if the declared address of its channel is
3356 the same address we think that we have. Otherwise, it could be
3357 evidence that we're reachable on some other address. Fixes bug
3358 20165; bugfix on 0.1.0.1-rc.
3360 o Minor bugfixes (spec conformance):
3361 - Use the correct key type when generating signing->link
3362 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
3364 o Minor bugfixes (subprotocol versions):
3365 - Consistently reject extra commas, instead of only rejecting
3366 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
3367 - In summarize_protover_flags(), treat empty strings the same as
3368 NULL. This prevents protocols_known from being set. Previously, we
3369 treated empty strings as normal strings, which led to
3370 protocols_known being set. Fixes bug 34232; bugfix on
3371 0.3.3.2-alpha. Patch by Neel Chauhan.
3373 o Minor bugfixes (v2 onion services):
3374 - For HSFETCH commands on v2 onion services addresses, check the
3375 length of bytes decoded, not the base32 length. Fixes bug 34400;
3376 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
3378 o Code simplification and refactoring:
3379 - Add and use a set of functions to perform down-casts on constant
3380 connection and channel pointers. Closes ticket 40046.
3381 - Refactor our code that logs descriptions of connections, channels,
3382 and the peers on them, to use a single call path. This change
3383 enables us to refactor the data types that they use, and eliminates
3384 many confusing usages of those types. Closes ticket 40041.
3385 - Refactor some common node selection code into a single function.
3386 Closes ticket 34200.
3387 - Remove the now-redundant 'outbuf_flushlen' field from our
3388 connection type. It was previously used for an older version of
3389 our rate-limiting logic. Closes ticket 33097.
3390 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
3391 instead, for consistency with other code. Closes ticket 18106.
3392 - Rename functions about "advertised" ports which are not in fact
3393 guaranteed to return the ports that have been advertised. Closes
3395 - Split implementation of several command line options from
3396 options_init_from_torrc into smaller isolated functions. Patch by
3397 Daniel Pinto. Closes ticket 40102.
3398 - When an extend cell is missing an IPv4 or IPv6 address, fill in
3399 the address from the extend info. This is similar to what was done
3400 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
3403 o Deprecated features:
3404 - The "non-builtin" argument to the "--dump-config" command is now
3405 deprecated. When it works, it behaves the same as "short", which
3406 you should use instead. Closes ticket 33398.
3409 - Replace URLs from our old bugtracker so that they refer to the new
3410 bugtracker and wiki. Closes ticket 40101.
3413 - We no longer ship or build a "tor.service" file for use with
3414 systemd. No distribution included this script unmodified, and we
3415 don't have the expertise ourselves to maintain this in a way that
3416 all the various systemd-based distributions can use. Closes
3418 - We no longer ship support for the Android logging API. Modern
3419 versions of Android can use the syslog API instead. Closes
3421 - The "optimistic data" feature is now always on; there is no longer
3422 an option to disable it from the torrc file or from the consensus
3423 directory. Closes part of 40139.
3424 - The "usecreatefast" network parameter is now removed; there is no
3425 longer an option for authorities to turn it off. Closes part
3429 - Add unit tests for bandwidth statistics manipulation functions.
3430 Closes ticket 33812. Patch by MrSquanchee.
3432 o Code simplification and refactoring (autoconf):
3433 - Remove autoconf checks for unused funcs and headers. Closes ticket
3434 31699; Patch by @bduszel
3436 o Code simplification and refactoring (maintainer scripts):
3437 - Disable by default the pre-commit hook. Use the environment
3438 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
3439 Furthermore, stop running practracker in the pre-commit hook and
3440 make check-local. Closes ticket 40019.
3442 o Code simplification and refactoring (relay address):
3443 - Most of IPv4 representation was using "uint32_t". It has now been
3444 moved to use the internal "tor_addr_t" interface instead. This is
3445 so we can properly integrate IPv6 along IPv4 with common
3446 interfaces. Closes ticket 40043.
3448 o Documentation (manual page):
3449 - Move them from doc/ to doc/man/. Closes ticket 40044.
3450 - Describe the status of the "Sandbox" option more accurately. It is
3451 no longer "experimental", but it _is_ dependent on kernel and libc
3452 versions. Closes ticket 23378.
3454 o Documentation (tracing):
3455 - Document in depth the circuit subsystem trace events in the new
3456 doc/tracing/EventsCircuit.md. Closes ticket 40036.
3459 Changes in version 0.4.4.5 - 2020-09-15
3460 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
3461 series improves our guard selection algorithms, adds v3 onion balance
3462 support, improves the amount of code that can be disabled when running
3463 without relay support, and includes numerous small bugfixes and
3464 enhancements. It also lays the ground for some IPv6 features that
3465 we'll be developing more in the next (0.4.5) series.
3467 Per our support policy, we support each stable release series for nine
3468 months after its first stable release, or three months after the first
3469 stable release of the next series: whichever is longer. This means
3470 that 0.4.4.x will be supported until around June 2021--or later, if
3471 0.4.5.x is later than anticipated.
3473 Note also that support for 0.4.2.x has just ended; support for 0.4.3
3474 will continue until Feb 15, 2021. We still plan to continue supporting
3475 0.3.5.x, our long-term stable series, until Feb 2022.
3477 Below are the changes since 0.4.4.4-rc. For a complete list of changes
3478 since 0.4.3.6, see the ReleaseNotes file.
3480 o Major bugfixes (onion services, DoS):
3481 - Correct handling of parameters for the onion service DoS defense.
3482 Previously, the consensus parameters for the onion service DoS
3483 defenses were overwriting the parameters set by the service
3484 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
3485 40109; bugfix on 0.4.2.1-alpha.
3487 o Major bugfixes (stats, onion services):
3488 - Fix a bug where we were undercounting the Tor network's total
3489 onion service traffic, by ignoring any traffic originating from
3490 clients. Now we count traffic from both clients and services.
3491 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
3493 o Minor features (control port):
3494 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
3495 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
3496 Closes ticket 40089. Patch by Neel Chauhan.
3498 o Minor features (denial-of-service memory limiter):
3499 - Allow the user to configure even lower values for the
3500 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
3501 when previously the minimum was 256 MB. On clients, there is no
3502 minimum. Relays and clients will both warn if the value is set so
3503 low that Tor is likely to stop working. Closes ticket 24308.
3505 o Minor features (tests):
3506 - Our "make check" target now runs the unit tests in 8 parallel
3507 chunks. Doing this speeds up hardened CI builds by more than a
3508 factor of two. Closes ticket 40098.
3510 o Minor bugfixes (guard selection algorithm):
3511 - Avoid needless guard-related warning when upgrading from 0.4.3 to
3512 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
3514 o Minor bugfixes (tests):
3515 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
3516 on its own. Previously, it would exit with an error. Fixes bug
3517 40099; bugfix on 0.2.8.1-alpha.
3520 Changes in version 0.4.4.3-alpha - 2020-07-27
3521 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
3522 including one affecting NSS users, and several affecting the Linux
3525 o Major features (fallback directory list):
3526 - Replace the 148 fallback directories originally included in Tor
3527 0.4.1.4-rc (of which around 105 are still functional) with a list
3528 of 144 fallbacks generated in July 2020. Closes ticket 40061.
3530 o Major bugfixes (NSS):
3531 - When running with NSS enabled, make sure that NSS knows to expect
3532 nonblocking sockets. Previously, we set our TCP sockets as
3533 nonblocking, but did not tell NSS, which in turn could lead to
3534 unexpected blocking behavior. Fixes bug 40035; bugfix
3537 o Minor bugfixes (linux seccomp2 sandbox):
3538 - Fix a regression on sandboxing rules for the openat() syscall. The
3539 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
3540 but broke with versions of glibc. We now choose a rule based on
3541 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
3543 - Makes the seccomp sandbox allow the correct syscall for opendir
3544 according to the running glibc version. This fixes crashes when
3545 reloading torrc with sandbox enabled when running on glibc 2.15 to
3546 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
3549 o Minor bugfixes (relay, usability):
3550 - Adjust the rules for when to warn about having too many
3551 connections to other relays. Previously we'd tolerate up to 1.5
3552 connections per relay on average. Now we tolerate more connections
3553 for directory authorities, and raise the number of total
3554 connections we need to see before we warn. Fixes bug 33880; bugfix
3558 - Replace most http:// URLs in our code and documentation with
3559 https:// URLs. (We have left unchanged the code in src/ext/, and
3560 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
3563 - Our "check-local" test target no longer tries to use the
3564 Coccinelle semantic patching tool parse all the C files. While it
3565 is a good idea to try to make sure Coccinelle works on our C
3566 before we run a Coccinelle patch, doing so on every test run has
3567 proven to be disruptive. You can still run this tool manually with
3568 "make check-cocci". Closes ticket 40030.
3571 Changes in version 0.3.5.11 - 2020-07-09
3572 Tor 0.3.5.11 backports fixes from later tor releases, including several
3573 usability, portability, and reliability fixes.
3575 This release also fixes TROVE-2020-001, a medium-severity denial of
3576 service vulnerability affecting all versions of Tor when compiled with
3577 the NSS encryption library. (This is not the default configuration.)
3578 Using this vulnerability, an attacker could cause an affected Tor
3579 instance to crash remotely. This issue is also tracked as CVE-2020-
3580 15572. Anybody running a version of Tor built with the NSS library
3581 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3584 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3585 - Fix a crash due to an out-of-bound memory access when Tor is
3586 compiled with NSS support. Fixes bug 33119; bugfix on
3587 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3590 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3591 - Fix a bug that was preventing DoS defenses from running on bridges
3592 with a pluggable transport. Previously, the DoS subsystem was not
3593 given the transport name of the client connection, thus failed to
3594 find the GeoIP cache entry for that client address. Fixes bug
3595 33491; bugfix on 0.3.3.2-alpha.
3597 o Minor features (testing, backport from 0.4.3.4-rc):
3598 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3599 variable to specify a list of space-separated test cases that
3600 should not be executed. We will use this to disable certain tests
3601 that are failing on Appveyor because of mismatched OpenSSL
3602 libraries. Part of ticket 33643.
3604 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3605 - Use the correct 64-bit printf format when compiling with MINGW on
3606 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3608 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3609 - Warn if the ContactInfo field is not set, and tell the relay
3610 operator that not having a ContactInfo field set might cause their
3611 relay to get rejected in the future. Fixes bug 33361; bugfix
3614 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3615 - Resume use of preemptively-built circuits when UseEntryGuards is set
3616 to 0. We accidentally disabled this feature with that config
3617 setting, leading to slower load times. Fixes bug 34303; bugfix
3620 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3621 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3622 style "/* falls through */" comments. Both Clang and GCC allow
3623 __attribute__((fallthrough)) instead, so that's what we're using
3624 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3626 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3627 - Fix a compiler warning on platforms with 32-bit time_t values.
3628 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3630 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3631 - When starting Tor any time after the first time in a process,
3632 register the thread in which it is running as the main thread.
3633 Previously, we only did this on Windows, which could lead to bugs
3634 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3637 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3638 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3639 if we are not running on Windows. Previously, non-Windows hosts
3640 would reject these line-endings in certain positions, making
3641 certain key files hard to move from one host to another. Fixes bug
3642 33032; bugfix on 0.3.5.1-alpha.
3644 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3645 - Downgrade a noisy log message that could occur naturally when
3646 receiving an extrainfo document that we no longer want. Fixes bug
3647 16016; bugfix on 0.2.6.3-alpha.
3649 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3650 - Remove a BUG() warning that would cause a stack trace if an onion
3651 service descriptor was freed while we were waiting for a
3652 rendezvous circuit to complete. Fixes bug 28992; bugfix
3655 o Testing (CI, backport from 0.4.3.4-rc):
3656 - In our Appveyor Windows CI, copy required DLLs to test and app
3657 directories, before running tor's tests. This ensures that tor.exe
3658 and test*.exe use the correct version of each DLL. This fix is not
3659 required, but we hope it will avoid DLL search issues in future.
3660 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3661 - On Appveyor, skip the crypto/openssl_version test, which is
3662 failing because of a mismatched library installation. Fix
3666 Changes in version 0.4.2.8 - 2020-07-09
3667 Tor 0.4.2.8 backports various fixes from later releases, including
3668 several that affect usability and portability.
3670 This release also fixes TROVE-2020-001, a medium-severity denial of
3671 service vulnerability affecting all versions of Tor when compiled with
3672 the NSS encryption library. (This is not the default configuration.)
3673 Using this vulnerability, an attacker could cause an affected Tor
3674 instance to crash remotely. This issue is also tracked as CVE-2020-
3675 15572. Anybody running a version of Tor built with the NSS library
3676 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3679 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3680 - Fix a crash due to an out-of-bound memory access when Tor is
3681 compiled with NSS support. Fixes bug 33119; bugfix on
3682 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3685 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3686 - Fix a bug that was preventing DoS defenses from running on bridges
3687 with a pluggable transport. Previously, the DoS subsystem was not
3688 given the transport name of the client connection, thus failed to
3689 find the GeoIP cache entry for that client address. Fixes bug
3690 33491; bugfix on 0.3.3.2-alpha.
3692 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
3693 - Default to sending SENDME version 1 cells. (Clients are already
3694 sending these, because of a consensus parameter telling them to do
3695 so: this change only affects what clients would do if the
3696 consensus didn't contain a recommendation.) Closes ticket 33623.
3698 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
3699 - Improve assertions and add some memory-poisoning code to try to
3700 track down possible causes of a rare crash (32564) in the EWMA
3701 code. Closes ticket 33290.
3703 o Minor features (testing, backport from 0.4.3.4-rc):
3704 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3705 variable to specify a list of space-separated test cases that
3706 should not be executed. We will use this to disable certain tests
3707 that are failing on Appveyor because of mismatched OpenSSL
3708 libraries. Part of ticket 33643.
3710 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3711 - Use the correct 64-bit printf format when compiling with MINGW on
3712 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3714 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3715 - Warn if the ContactInfo field is not set, and tell the relay
3716 operator that not having a ContactInfo field set might cause their
3717 relay to get rejected in the future. Fixes bug 33361; bugfix
3720 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3721 - Resume use of preemptively-built circuits when UseEntryGuards is set
3722 to 0. We accidentally disabled this feature with that config
3723 setting, leading to slower load times. Fixes bug 34303; bugfix
3726 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3727 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3728 style "/* falls through */" comments. Both Clang and GCC allow
3729 __attribute__((fallthrough)) instead, so that's what we're using
3730 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3731 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3734 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3735 - Fix a compiler warning on platforms with 32-bit time_t values.
3736 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3738 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
3739 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3740 report them as SIGNAL events. Previously we would log a bug
3741 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3743 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3744 - When starting Tor any time after the first time in a process,
3745 register the thread in which it is running as the main thread.
3746 Previously, we only did this on Windows, which could lead to bugs
3747 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3750 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3751 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3752 if we are not running on Windows. Previously, non-Windows hosts
3753 would reject these line-endings in certain positions, making
3754 certain key files hard to move from one host to another. Fixes bug
3755 33032; bugfix on 0.3.5.1-alpha.
3757 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
3758 - When logging a bug, do not say "Future instances of this warning
3759 will be silenced" unless we are actually going to silence them.
3760 Previously we would say this whenever a BUG() check failed in the
3761 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3763 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
3764 - Flush stderr, stdout, and file logs during shutdown, if supported
3765 by the OS. This change helps make sure that any final logs are
3766 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3768 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3769 - Downgrade a noisy log message that could occur naturally when
3770 receiving an extrainfo document that we no longer want. Fixes bug
3771 16016; bugfix on 0.2.6.3-alpha.
3773 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3774 - Remove a BUG() warning that would cause a stack trace if an onion
3775 service descriptor was freed while we were waiting for a
3776 rendezvous circuit to complete. Fixes bug 28992; bugfix
3779 o Testing (CI, backport from 0.4.3.4-rc):
3780 - In our Appveyor Windows CI, copy required DLLs to test and app
3781 directories, before running tor's tests. This ensures that tor.exe
3782 and test*.exe use the correct version of each DLL. This fix is not
3783 required, but we hope it will avoid DLL search issues in future.
3784 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3785 - On Appveyor, skip the crypto/openssl_version test, which is
3786 failing because of a mismatched library installation. Fix
3790 Changes in version 0.4.3.6 - 2020-07-09
3791 Tor 0.4.3.6 backports several bugfixes from later releases, including
3792 some affecting usability.
3794 This release also fixes TROVE-2020-001, a medium-severity denial of
3795 service vulnerability affecting all versions of Tor when compiled with
3796 the NSS encryption library. (This is not the default configuration.)
3797 Using this vulnerability, an attacker could cause an affected Tor
3798 instance to crash remotely. This issue is also tracked as CVE-2020-
3799 15572. Anybody running a version of Tor built with the NSS library
3800 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3803 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3804 - Fix a crash due to an out-of-bound memory access when Tor is
3805 compiled with NSS support. Fixes bug 33119; bugfix on
3806 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3809 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3810 - Use the correct 64-bit printf format when compiling with MINGW on
3811 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3813 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3814 - Resume use of preemptively-built circuits when UseEntryGuards is set
3815 to 0. We accidentally disabled this feature with that config
3816 setting, leading to slower load times. Fixes bug 34303; bugfix
3819 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3820 - Fix a compiler warning on platforms with 32-bit time_t values.
3821 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3823 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
3824 - Fix a startup crash when tor is compiled with --enable-nss and
3825 sandbox support is enabled. Fixes bug 34130; bugfix on
3826 0.3.5.1-alpha. Patch by Daniel Pinto.
3828 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3829 - Downgrade a noisy log message that could occur naturally when
3830 receiving an extrainfo document that we no longer want. Fixes bug
3831 16016; bugfix on 0.2.6.3-alpha.
3833 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
3834 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3835 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3837 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
3838 - Prevent an assert() that would occur when cleaning the client
3839 descriptor cache, and attempting to close circuits for a non-
3840 decrypted descriptor (lacking client authorization). Fixes bug
3841 33458; bugfix on 0.4.2.1-alpha.
3843 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
3844 - Fix a portability error in the configure script, where we were
3845 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3847 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3848 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3849 descriptors, when the IPv6 port was configured as "auto". Fixes
3850 bug 32588; bugfix on 0.2.3.9-alpha.
3852 o Documentation (backport from 0.4.4.1-alpha):
3853 - Fix several doxygen warnings related to imbalanced groups. Closes
3857 Changes in version 0.4.4.2-alpha - 2020-07-09
3858 This is the second alpha release in the 0.4.4.x series. It fixes a few
3859 bugs in the previous release, and solves a few usability,
3860 compatibility, and portability issues.
3862 This release also fixes TROVE-2020-001, a medium-severity denial of
3863 service vulnerability affecting all versions of Tor when compiled with
3864 the NSS encryption library. (This is not the default configuration.)
3865 Using this vulnerability, an attacker could cause an affected Tor
3866 instance to crash remotely. This issue is also tracked as CVE-2020-
3867 15572. Anybody running a version of Tor built with the NSS library
3868 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3871 o Major bugfixes (NSS, security):
3872 - Fix a crash due to an out-of-bound memory access when Tor is
3873 compiled with NSS support. Fixes bug 33119; bugfix on
3874 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3877 o Minor features (bootstrap reporting):
3878 - Report more detailed reasons for bootstrap failure when the
3879 failure happens due to a TLS error. Previously we would just call
3880 these errors "MISC" when they happened during read, and "DONE"
3881 when they happened during any other TLS operation. Closes
3884 o Minor features (directory authority):
3885 - Authorities now recommend the protocol versions that are supported
3886 by Tor 0.3.5 and later. (Earlier versions of Tor have been
3887 deprecated since January of this year.) This recommendation will
3888 cause older clients and relays to give a warning on startup, or
3889 when they download a consensus directory. Closes ticket 32696.
3891 o Minor features (entry guards):
3892 - Reinstate support for GUARD NEW/UP/DOWN control port events.
3893 Closes ticket 40001.
3895 o Minor features (linux seccomp2 sandbox, portability):
3896 - Allow Tor to build on platforms where it doesn't know how to
3897 report which syscall caused the linux seccomp2 sandbox to fail.
3898 This change should make the sandbox code more portable to less
3899 common Linux architectures. Closes ticket 34382.
3900 - Permit the unlinkat() syscall, which some Libc implementations use
3901 to implement unlink(). Closes ticket 33346.
3903 o Minor bugfix (CI, Windows):
3904 - Use the correct 64-bit printf format when compiling with MINGW on
3905 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3907 o Minor bugfix (onion service v3 client):
3908 - Remove a BUG() warning that could occur naturally. Fixes bug
3909 34087; bugfix on 0.3.2.1-alpha.
3911 o Minor bugfix (SOCKS, onion service client):
3912 - Detect v3 onion service addresses of the wrong length when
3913 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
3916 o Minor bugfixes (compiler warnings):
3917 - Fix a compiler warning on platforms with 32-bit time_t values.
3918 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3920 o Minor bugfixes (control port, onion service):
3921 - Consistently use 'address' in "Invalid v3 address" response to
3922 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
3923 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
3925 o Minor bugfixes (logging):
3926 - Downgrade a noisy log message that could occur naturally when
3927 receiving an extrainfo document that we no longer want. Fixes bug
3928 16016; bugfix on 0.2.6.3-alpha.
3930 o Minor bugfixes (onion services v3):
3931 - Avoid a non-fatal assertion failure in certain edge-cases when
3932 opening an intro circuit as a client. Fixes bug 34084; bugfix
3935 o Deprecated features (onion service v2):
3936 - Add a deprecation warning for version 2 onion services. Closes
3939 o Removed features (IPv6, revert):
3940 - Revert the change in the default value of ClientPreferIPv6OrPort:
3941 it breaks the torsocks use case. The SOCKS resolve command has no
3942 mechanism to ask for a specific address family (v4 or v6), and so
3943 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
3944 interface resulted in a failure. Tor Browser explicitly sets
3945 PreferIPv6, so this should not affect the majority of our users.
3946 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
3949 Changes in version 0.4.4.1-alpha - 2020-06-16
3950 This is the first alpha release in the 0.4.4.x series. It improves
3951 our guard selection algorithms, improves the amount of code that
3952 can be disabled when running without relay support, and includes numerous
3953 small bugfixes and enhancements. It also lays the ground for some IPv6
3954 features that we'll be developing more in the next (0.4.5) series.
3956 Here are the changes since 0.4.3.5.
3958 o Major features (Proposal 310, performance + security):
3959 - Implements Proposal 310, "Bandaid on guard selection". Proposal
3960 310 solves load-balancing issues with older versions of the guard
3961 selection algorithm, and improves its security. Under this new
3962 algorithm, a newly selected guard never becomes Primary unless all
3963 previously sampled guards are unreachable. Implements
3964 recommendation from 32088. (Proposal 310 is linked to the CLAPS
3965 project researching optimal client location-aware path selections.
3966 This project is a collaboration between the UCLouvain Crypto Group,
3967 the U.S. Naval Research Laboratory, and Princeton University.)
3969 o Major features (IPv6, relay):
3970 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
3971 warning if the IPv4 or IPv6 address is an internal address, and
3972 internal addresses are not allowed. But continue to use the other
3973 address, if it is valid. Closes ticket 33817.
3974 - If a relay can extend over IPv4 and IPv6, and both addresses are
3975 provided, it chooses between them uniformly at random. Closes
3977 - Re-use existing IPv6 connections for circuit extends. Closes
3979 - Relays may extend circuits over IPv6, if the relay has an IPv6
3980 ORPort, and the client supplies the other relay's IPv6 ORPort in
3981 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
3982 ORPort self-tests in 33222. Closes ticket 33817.
3984 o Major features (v3 onion services):
3985 - Allow v3 onion services to act as OnionBalance backend instances,
3986 by using the HiddenServiceOnionBalanceInstance torrc option.
3987 Closes ticket 32709.
3989 o Minor feature (developer tools):
3990 - Add a script to help check the alphabetical ordering of option
3991 names in the manual page. Closes ticket 33339.
3993 o Minor feature (onion service client, SOCKS5):
3994 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
3995 new type of onion service connection failures. The semantics of
3996 these error codes are documented in proposal 309. Closes
3999 o Minor feature (onion service v3):
4000 - If a service cannot upload its descriptor(s), log why at INFO
4001 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
4003 o Minor feature (python scripts):
4004 - Stop assuming that /usr/bin/python exists. Instead of using a
4005 hardcoded path in scripts that still use Python 2, use
4006 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
4007 bug 33192; bugfix on 0.4.2.
4009 o Minor features (client-only compilation):
4010 - Disable more code related to the ext_orport protocol when
4011 compiling without support for relay mode. Closes ticket 33368.
4012 - Disable more of our self-testing code when support for relay mode
4013 is disabled. Closes ticket 33370.
4015 o Minor features (code safety):
4016 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
4017 functions in DNS and IP address processing code, and adjust
4018 codepaths to make them less likely to crash entire Tor instances.
4019 Resolves issue 33788.
4021 o Minor features (compilation size):
4022 - Most server-side DNS code is now disabled when building without
4023 support for relay mode. Closes ticket 33366.
4025 o Minor features (continuous integration):
4026 - Run unit-test and integration test (Stem, Chutney) jobs with
4027 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
4028 Resolves ticket 32143.
4030 o Minor features (control port):
4031 - Return a descriptive error message from the 'GETINFO status/fresh-
4032 relay-descs' command on the control port. Previously, we returned
4033 a generic error of "Error generating descriptor". Closes ticket
4034 32873. Patch by Neel Chauhan.
4036 o Minor features (developer tooling):
4037 - Refrain from listing all .a files that are generated by the Tor
4038 build in .gitignore. Add a single wildcard *.a entry that covers
4039 all of them for present and future. Closes ticket 33642.
4040 - Add a script ("git-install-tools.sh") to install git hooks and
4041 helper scripts. Closes ticket 33451.
4043 o Minor features (directory authority, shared random):
4044 - Refactor more authority-only parts of the shared-random scheduling
4045 code to reside in the dirauth module, and to be disabled when
4046 compiling with --disable-module-dirauth. Closes ticket 33436.
4048 o Minor features (directory):
4049 - Remember the number of bytes we have downloaded for each directory
4050 purpose while bootstrapping, and while fully bootstrapped. Log
4051 this information as part of the heartbeat message. Closes
4054 o Minor features (IPv6 support):
4055 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
4056 changes and tor_addr_is_null(). Closes ticket 33679. Patch
4058 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
4059 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
4060 Closes ticket 33901.
4062 o Minor features (logging):
4063 - When trying to find our own address, add debug-level logging to
4064 report the sources of candidate addresses. Closes ticket 32888.
4066 o Minor features (testing, architecture):
4067 - Our test scripts now double-check that subsystem initialization
4068 order is consistent with the inter-module dependencies established
4069 by our .may_include files. Implements ticket 31634.
4070 - Initialize all subsystems at the beginning of our unit test
4071 harness, to avoid crashes due to uninitialized subsystems. Follow-
4072 up from ticket 33316.
4074 o Minor features (v3 onion services):
4075 - Add v3 onion service status to the dumpstats() call which is
4076 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
4077 services. Closes ticket 24844. Patch by Neel Chauhan.
4079 o Minor features (windows):
4080 - Add support for console control signals like Ctrl+C in Windows.
4081 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
4083 o Minor bugfix (onion service v3):
4084 - Prevent an assert() that would occur when cleaning the client
4085 descriptor cache, and attempting to close circuits for a non-
4086 decrypted descriptor (lacking client authorization). Fixes bug
4087 33458; bugfix on 0.4.2.1-alpha.
4089 o Minor bugfix (refactoring):
4090 - Lift circuit_build_times_disabled() out of the
4091 circuit_expire_building() loop, to save CPU time when there are
4092 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
4094 o Minor bugfixes (client performance):
4095 - Resume use of preemptively-built circuits when UseEntryGuards is set
4096 to 0. We accidentally disabled this feature with that config
4097 setting, leading to slower load times. Fixes bug 34303; bugfix
4100 o Minor bugfixes (directory authorities):
4101 - Directory authorities now reject votes that arrive too late. In
4102 particular, once an authority has started fetching missing votes,
4103 it no longer accepts new votes posted by other authorities. This
4104 change helps prevent a consensus split, where only some authorities
4105 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
4107 o Minor bugfixes (git scripts):
4108 - Stop executing the checked-out pre-commit hook from the pre-push
4109 hook. Instead, execute the copy in the user's git directory. Fixes
4110 bug 33284; bugfix on 0.4.1.1-alpha.
4112 o Minor bugfixes (initialization):
4113 - Initialize the subsystems in our code in an order more closely
4114 corresponding to their dependencies, so that every system is
4115 initialized before the ones that (theoretically) depend on it.
4116 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
4118 o Minor bugfixes (IPv4, relay):
4119 - Check for invalid zero IPv4 addresses and ports when sending and
4120 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
4122 o Minor bugfixes (IPv6, relay):
4123 - Consider IPv6 addresses when checking if a connection is
4124 canonical. In 17604, relays assumed that a remote relay could
4125 consider an IPv6 connection canonical, but did not set the
4126 canonical flag on their side of the connection. Fixes bug 33899;
4127 bugfix on 0.3.1.1-alpha.
4128 - Log IPv6 addresses on connections where this relay is the
4129 responder. Previously, responding relays would replace the remote
4130 IPv6 address with the IPv4 address from the consensus. Fixes bug
4131 33899; bugfix on 0.3.1.1-alpha.
4133 o Minor bugfixes (linux seccomp sandbox nss):
4134 - Fix a startup crash when tor is compiled with --enable-nss and
4135 sandbox support is enabled. Fixes bug 34130; bugfix on
4136 0.3.5.1-alpha. Patch by Daniel Pinto.
4138 o Minor bugfixes (logging, testing):
4139 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
4140 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
4141 used to log a non-fatal warning, regardless of the debugging
4142 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
4144 o Minor bugfixes (logs):
4145 - Remove surprising empty line in the INFO-level log about circuit
4146 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
4148 o Minor bugfixes (mainloop):
4149 - Better guard against growing a buffer past its maximum 2GB in
4150 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
4152 o Minor bugfixes (manual page):
4153 - Update the man page to reflect that MinUptimeHidServDirectoryV2
4154 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
4156 o Minor bugfixes (onion service v3, client):
4157 - Remove a BUG() that was causing a stacktrace when a descriptor
4158 changed at an unexpected time. Fixes bug 28992; bugfix
4161 o Minor bugfixes (onion service, logging):
4162 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
4163 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
4165 o Minor bugfixes (portability):
4166 - Fix a portability error in the configure script, where we were
4167 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
4169 o Minor bugfixes (protocol versions):
4170 - Sort tor's supported protocol version lists, as recommended by the
4171 tor directory specification. Fixes bug 33285; bugfix
4174 o Minor bugfixes (relays):
4175 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
4176 descriptors, when the IPv6 port was configured as "auto". Fixes
4177 bug 32588; bugfix on 0.2.3.9-alpha.
4179 o Code simplification and refactoring:
4180 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
4181 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
4182 brackets, separating colon, and port number. Closes ticket 33956.
4183 Patch by Neel Chauhan.
4184 - Merge the orconn and ocirc events into the "core" subsystem, which
4185 manages or connections and origin circuits. Previously they were
4186 isolated in subsystems of their own.
4187 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
4188 inversion. Closes ticket 33633.
4189 - Move the circuit extend code to the relay module. Split the
4190 circuit extend function into smaller functions. Closes
4192 - Rewrite port_parse_config() to use the default port flags from
4193 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
4194 - Updated comments in 'scheduler.c' to reflect old code changes, and
4195 simplified the scheduler channel state change code. Closes
4199 - Document the limitations of using %include on config files with
4200 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
4201 0.3.1.1-alpha. Patch by Daniel Pinto.
4202 - Fix several doxygen warnings related to imbalanced groups. Closes
4206 - Remove the ClientAutoIPv6ORPort option. This option attempted to
4207 randomly choose between IPv4 and IPv6 for client connections, and
4208 wasn't a true implementation of Happy Eyeballs. Often, this option
4209 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
4210 Patch by Neel Chauhan.
4211 - Stop shipping contrib/dist/rc.subr file, as it is not being used
4212 on FreeBSD anymore. Closes issue 31576.
4215 - Add a basic IPv6 test to "make test-network". This test only runs
4216 when the local machine has an IPv6 stack. Closes ticket 33300.
4217 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
4218 These jobs run the IPv4-only and dual-stack chutney flavours from
4219 test-network-all. Closes ticket 33280.
4220 - Remove a redundant distcheck job. Closes ticket 33194.
4221 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
4222 chutney job. This job runs on macOS, so it's a bit slow. Closes
4224 - Sort the Travis jobs in order of speed. Putting the slowest jobs
4225 first takes full advantage of Travis job concurrency. Closes
4227 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4228 previously configured to fast_finish (which requires
4229 allow_failure), to speed up the build. Closes ticket 33195.
4230 - Test v3 onion services to tor's mixed IPv4 chutney network. And
4231 add a mixed IPv6 chutney network. These networks are used in the
4232 test-network-all, test-network-ipv4, and test-network-ipv6 make
4233 targets. Closes ticket 33334.
4234 - Use the "bridges+hs-v23" chutney network flavour in "make test-
4235 network". This test requires a recent version of chutney (mid-
4236 February 2020). Closes ticket 28208.
4237 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4238 tool to produce detailed diagnostic output. Closes ticket 32792.
4240 o Code simplification and refactoring (onion service):
4241 - Refactor configuration parsing to use the new config subsystem
4242 code. Closes ticket 33014.
4244 o Code simplification and refactoring (relay address):
4245 - Move a series of functions related to address resolving into their
4246 own files. Closes ticket 33789.
4248 o Documentation (manual page):
4249 - Add cross reference links and a table of contents to the HTML tor
4250 manual page. Closes ticket 33369. Work by Swati Thacker as part of
4251 Google Season of Docs.
4252 - Alphabetize the Denial of Service Mitigation Options, Directory
4253 Authority Server Options, Hidden Service Options, and Testing
4254 Network Options sections of the tor(1) manual page. Closes ticket
4255 33275. Work by Swati Thacker as part of Google Season of Docs.
4256 - Refrain from mentioning nicknames in manpage section for MyFamily
4257 torrc option. Resolves issue 33417.
4258 - Updated the options set by TestingTorNetwork in the manual page.
4259 Closes ticket 33778.
4262 Changes in version 0.4.3.5 - 2020-05-15
4263 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
4264 series adds support for building without relay code enabled, and
4265 implements functionality needed for OnionBalance with v3 onion
4266 services. It includes significant refactoring of our configuration and
4267 controller functionality, and fixes numerous smaller bugs and
4270 Per our support policy, we support each stable release series for nine
4271 months after its first stable release, or three months after the first
4272 stable release of the next series: whichever is longer. This means
4273 that 0.4.3.x will be supported until around February 2021--later, if
4274 0.4.4.x is later than anticipated.
4276 Note also that support for 0.4.1.x is about to end on May 20 of this
4277 year; 0.4.2.x will be supported until September 15. We still plan to
4278 continue supporting 0.3.5.x, our long-term stable series, until
4281 Below are the changes since 0.4.3.4-rc. For a complete list of changes
4282 since 0.4.2.6, see the ReleaseNotes file.
4284 o Minor bugfixes (compiler compatibility):
4285 - Avoid compiler warnings from Clang 10 related to the use of GCC-
4286 style "/* falls through */" comments. Both Clang and GCC allow
4287 __attribute__((fallthrough)) instead, so that's what we're using
4288 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
4289 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
4292 o Minor bugfixes (logging):
4293 - Stop truncating IPv6 addresses and ports in channel and connection
4294 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
4295 - Fix a logic error in a log message about whether an address was
4296 invalid. Previously, the code would never report that onion
4297 addresses were onion addresses. Fixes bug 34131; bugfix
4301 Changes in version 0.4.3.4-rc - 2020-04-13
4302 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
4303 several bugs from earlier versions, including one affecting DoS
4304 defenses on bridges using pluggable transports.
4306 o Major bugfixes (DoS defenses, bridges, pluggable transport):
4307 - Fix a bug that was preventing DoS defenses from running on bridges
4308 with a pluggable transport. Previously, the DoS subsystem was not
4309 given the transport name of the client connection, thus failed to
4310 find the GeoIP cache entry for that client address. Fixes bug
4311 33491; bugfix on 0.3.3.2-alpha.
4313 o Minor feature (sendme, flow control):
4314 - Default to sending SENDME version 1 cells. (Clients are already
4315 sending these, because of a consensus parameter telling them to do
4316 so: this change only affects what clients would do if the
4317 consensus didn't contain a recommendation.) Closes ticket 33623.
4319 o Minor features (testing):
4320 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
4321 variable to specify a list of space-separated test cases that
4322 should not be executed. We will use this to disable certain tests
4323 that are failing on Appveyor because of mismatched OpenSSL
4324 libraries. Part of ticket 33643.
4326 o Minor bugfixes (--disable-module-relay):
4327 - Fix an assertion failure when Tor is built without the relay
4328 module, and then invoked with the "User" option. Fixes bug 33668;
4329 bugfix on 0.4.3.1-alpha.
4331 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
4332 - Set some output arguments in the relay and dirauth module stubs,
4333 to guard against future stub argument handling bugs like 33668.
4334 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
4336 o Minor bugfixes (build system):
4337 - Correctly output the enabled module in the configure summary.
4338 Before that, the list shown was just plain wrong. Fixes bug 33646;
4339 bugfix on 0.4.3.2-alpha.
4341 o Minor bugfixes (client, IPv6):
4342 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
4343 Instead, prefer IPv6 connections by default, but allow users to
4344 change their configs using the "NoPreferIPv6" port flag. Fixes bug
4345 33608; bugfix on 0.4.3.1-alpha.
4346 - Revert PreferIPv6 set by default on the SocksPort because it broke
4347 the torsocks use case. Tor doesn't have a way for an application
4348 to request the hostname to be resolved for a specific IP version,
4349 but torsocks requires that. Up until now, IPv4 was used by default
4350 so torsocks is expecting that, and can't handle a possible IPv6
4351 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
4353 o Minor bugfixes (key portability):
4354 - When reading PEM-encoded key data, tolerate CRLF line-endings even
4355 if we are not running on Windows. Previously, non-Windows hosts
4356 would reject these line-endings in certain positions, making
4357 certain key files hard to move from one host to another. Fixes bug
4358 33032; bugfix on 0.3.5.1-alpha.
4360 o Minor bugfixes (logging):
4361 - Flush stderr, stdout, and file logs during shutdown, if supported
4362 by the OS. This change helps make sure that any final logs are
4363 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
4364 - Stop closing stderr and stdout during shutdown. Closing these file
4365 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
4368 o Minor bugfixes (onion services v3):
4369 - Relax severity of a log message that can appear naturally when
4370 decoding onion service descriptors as a relay. Also add some
4371 diagnostics to debug any future bugs in that area. Fixes bug
4372 31669; bugfix on 0.3.0.1-alpha.
4373 - Block a client-side assertion by disallowing the registration of
4374 an x25519 client auth key that's all zeroes. Fixes bug 33545;
4375 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
4377 o Code simplification and refactoring:
4378 - Disable our coding standards best practices tracker in our git
4379 hooks. (0.4.3 branches only.) Closes ticket 33678.
4382 - Avoid conflicts between the fake sockets in tor's unit tests, and
4383 real file descriptors. Resolves issues running unit tests with
4384 GitHub Actions, where the process that embeds or launches the
4385 tests has already opened a large number of file descriptors. Fixes
4386 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
4390 - In our Appveyor Windows CI, copy required DLLs to test and app
4391 directories, before running tor's tests. This ensures that tor.exe
4392 and test*.exe use the correct version of each DLL. This fix is not
4393 required, but we hope it will avoid DLL search issues in future.
4394 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
4395 - On Appveyor, skip the crypto/openssl_version test, which is
4396 failing because of a mismatched library installation. Fix
4400 Changes in version 0.4.3.3-alpha - 2020-03-18
4401 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
4402 TROVE-2020-002, a major denial-of-service vulnerability that affected
4403 all released Tor instances since 0.2.1.5-alpha. Using this
4404 vulnerability, an attacker could cause Tor instances to consume a huge
4405 amount of CPU, disrupting their operations for several seconds or
4406 minutes. This attack could be launched by anybody against a relay, or
4407 by a directory cache against any client that had connected to it. The
4408 attacker could launch this attack as much as they wanted, thereby
4409 disrupting service or creating patterns that could aid in traffic
4410 analysis. This issue was found by OSS-Fuzz, and is also tracked
4413 We do not have reason to believe that this attack is currently being
4414 exploited in the wild, but nonetheless we advise everyone to upgrade
4415 as soon as packages are available.
4417 o Major bugfixes (security, denial-of-service):
4418 - Fix a denial-of-service bug that could be used by anyone to
4419 consume a bunch of CPU on any Tor relay or authority, or by
4420 directories to consume a bunch of CPU on clients or hidden
4421 services. Because of the potential for CPU consumption to
4422 introduce observable timing patterns, we are treating this as a
4423 high-severity security issue. Fixes bug 33119; bugfix on
4424 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4425 as TROVE-2020-002 and CVE-2020-10592.
4427 o Major bugfixes (circuit padding, memory leak):
4428 - Avoid a remotely triggered memory leak in the case that a circuit
4429 padding machine is somehow negotiated twice on the same circuit.
4430 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4431 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4433 o Major bugfixes (directory authority):
4434 - Directory authorities will now send a 503 (not enough bandwidth)
4435 code to clients when under bandwidth pressure. Known relays and
4436 other authorities will always be answered regardless of the
4437 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
4439 o Minor features (diagnostic):
4440 - Improve assertions and add some memory-poisoning code to try to
4441 track down possible causes of a rare crash (32564) in the EWMA
4442 code. Closes ticket 33290.
4444 o Minor features (directory authorities):
4445 - Directory authorities now reject descriptors from relays running
4446 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
4447 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
4449 o Minor features (usability):
4450 - Include more information when failing to parse a configuration
4451 value. This should make it easier to tell what's going wrong when
4452 a configuration file doesn't parse. Closes ticket 33460.
4454 o Minor bugfix (relay, configuration):
4455 - Warn if the ContactInfo field is not set, and tell the relay
4456 operator that not having a ContactInfo field set might cause their
4457 relay to get rejected in the future. Fixes bug 33361; bugfix
4460 o Minor bugfixes (coding best practices checks):
4461 - Allow the "practracker" script to read unicode files when using
4462 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
4463 but didn't change the codec for opening files. Fixes bug 33374;
4464 bugfix on 0.4.3.1-alpha.
4466 o Minor bugfixes (continuous integration):
4467 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
4470 o Minor bugfixes (onion service v3, client):
4471 - Remove a BUG() warning that would cause a stack trace if an onion
4472 service descriptor was freed while we were waiting for a
4473 rendezvous circuit to complete. Fixes bug 28992; bugfix
4476 o Minor bugfixes (onion services v3):
4477 - Fix an assertion failure that could result from a corrupted
4478 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4479 bugfix on 0.3.3.1-alpha. This issue is also tracked
4482 o Documentation (manpage):
4483 - Alphabetize the Server and Directory server sections of the tor
4484 manpage. Also split Statistics options into their own section of
4485 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
4486 Google Season of Docs.
4487 - Document the __OwningControllerProcess torrc option and specify
4488 its polling interval. Resolves issue 32971.
4490 o Testing (Travis CI):
4491 - Remove a redundant distcheck job. Closes ticket 33194.
4492 - Sort the Travis jobs in order of speed: putting the slowest jobs
4493 first takes full advantage of Travis job concurrency. Closes
4495 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4496 previously configured to fast_finish (which requires
4497 allow_failure), to speed up the build. Closes ticket 33195.
4498 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4499 tool to produce detailed diagnostic output. Closes ticket 32792.
4502 Changes in version 0.4.2.7 - 2020-03-18
4503 This is the third stable release in the 0.4.2.x series. It backports
4504 numerous fixes from later releases, including a fix for TROVE-2020-
4505 002, a major denial-of-service vulnerability that affected all
4506 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
4507 an attacker could cause Tor instances to consume a huge amount of CPU,
4508 disrupting their operations for several seconds or minutes. This
4509 attack could be launched by anybody against a relay, or by a directory
4510 cache against any client that had connected to it. The attacker could
4511 launch this attack as much as they wanted, thereby disrupting service
4512 or creating patterns that could aid in traffic analysis. This issue
4513 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
4515 We do not have reason to believe that this attack is currently being
4516 exploited in the wild, but nonetheless we advise everyone to upgrade
4517 as soon as packages are available.
4519 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4520 - Fix a denial-of-service bug that could be used by anyone to
4521 consume a bunch of CPU on any Tor relay or authority, or by
4522 directories to consume a bunch of CPU on clients or hidden
4523 services. Because of the potential for CPU consumption to
4524 introduce observable timing patterns, we are treating this as a
4525 high-severity security issue. Fixes bug 33119; bugfix on
4526 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4527 as TROVE-2020-002 and CVE-2020-10592.
4529 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4530 - Avoid a remotely triggered memory leak in the case that a circuit
4531 padding machine is somehow negotiated twice on the same circuit.
4532 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4533 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4535 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
4536 - Directory authorities will now send a 503 (not enough bandwidth)
4537 code to clients when under bandwidth pressure. Known relays and
4538 other authorities will always be answered regardless of the
4539 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
4541 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4542 - Stop allowing failures on the Travis CI stem tests job. It looks
4543 like all the stem hangs we were seeing before are now fixed.
4544 Closes ticket 33075.
4546 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4547 - Lowercase the configured value of BridgeDistribution before adding
4548 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4550 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4551 - If we encounter a bug when flushing a buffer to a TLS connection,
4552 only log the bug once per invocation of the Tor process.
4553 Previously we would log with every occurrence, which could cause
4554 us to run out of disk space. Fixes bug 33093; bugfix
4557 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4558 - Fix an assertion failure that could result from a corrupted
4559 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4560 bugfix on 0.3.3.1-alpha. This issue is also tracked
4563 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4564 - Fix a syntax warning given by newer versions of Rust that was
4565 creating problems for our continuous integration. Fixes bug 33212;
4566 bugfix on 0.3.5.1-alpha.
4568 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4569 - Remove a redundant distcheck job. Closes ticket 33194.
4570 - Sort the Travis jobs in order of speed: putting the slowest jobs
4571 first takes full advantage of Travis job concurrency. Closes
4573 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4574 previously configured to fast_finish (which requires
4575 allow_failure), to speed up the build. Closes ticket 33195.
4576 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4577 tool to produce detailed diagnostic output. Closes ticket 32792.
4580 Changes in version 0.4.1.9 - 2020-03-18
4581 Tor 0.4.1.9 backports important fixes from later Tor releases,
4582 including a fix for TROVE-2020-002, a major denial-of-service
4583 vulnerability that affected all released Tor instances since
4584 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
4585 instances to consume a huge amount of CPU, disrupting their operations
4586 for several seconds or minutes. This attack could be launched by
4587 anybody against a relay, or by a directory cache against any client
4588 that had connected to it. The attacker could launch this attack as
4589 much as they wanted, thereby disrupting service or creating patterns
4590 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
4591 and is also tracked as CVE-2020-10592.
4593 We do not have reason to believe that this attack is currently being
4594 exploited in the wild, but nonetheless we advise everyone to upgrade
4595 as soon as packages are available.
4597 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4598 - Fix a denial-of-service bug that could be used by anyone to
4599 consume a bunch of CPU on any Tor relay or authority, or by
4600 directories to consume a bunch of CPU on clients or hidden
4601 services. Because of the potential for CPU consumption to
4602 introduce observable timing patterns, we are treating this as a
4603 high-severity security issue. Fixes bug 33119; bugfix on
4604 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4605 as TROVE-2020-002 and CVE-2020-10592.
4607 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4608 - Avoid a remotely triggered memory leak in the case that a circuit
4609 padding machine is somehow negotiated twice on the same circuit.
4610 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4611 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4613 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4614 - Lowercase the configured value of BridgeDistribution before adding
4615 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4617 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4618 - If we encounter a bug when flushing a buffer to a TLS connection,
4619 only log the bug once per invocation of the Tor process.
4620 Previously we would log with every occurrence, which could cause
4621 us to run out of disk space. Fixes bug 33093; bugfix
4624 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4625 - Fix an assertion failure that could result from a corrupted
4626 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4627 bugfix on 0.3.3.1-alpha. This issue is also tracked
4630 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4631 - Fix a syntax warning given by newer versions of Rust that was
4632 creating problems for our continuous integration. Fixes bug 33212;
4633 bugfix on 0.3.5.1-alpha.
4635 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4636 - Remove a redundant distcheck job. Closes ticket 33194.
4637 - Sort the Travis jobs in order of speed: putting the slowest jobs
4638 first takes full advantage of Travis job concurrency. Closes
4640 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4641 previously configured to fast_finish (which requires
4642 allow_failure), to speed up the build. Closes ticket 33195.
4643 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4644 tool to produce detailed diagnostic output. Closes ticket 32792.
4647 Changes in version 0.3.5.10 - 2020-03-18
4648 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
4649 fix for TROVE-2020-002, a major denial-of-service vulnerability that
4650 affected all released Tor instances since 0.2.1.5-alpha. Using this
4651 vulnerability, an attacker could cause Tor instances to consume a huge
4652 amount of CPU, disrupting their operations for several seconds or
4653 minutes. This attack could be launched by anybody against a relay, or
4654 by a directory cache against any client that had connected to it. The
4655 attacker could launch this attack as much as they wanted, thereby
4656 disrupting service or creating patterns that could aid in traffic
4657 analysis. This issue was found by OSS-Fuzz, and is also tracked
4660 We do not have reason to believe that this attack is currently being
4661 exploited in the wild, but nonetheless we advise everyone to upgrade
4662 as soon as packages are available.
4664 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4665 - Fix a denial-of-service bug that could be used by anyone to
4666 consume a bunch of CPU on any Tor relay or authority, or by
4667 directories to consume a bunch of CPU on clients or hidden
4668 services. Because of the potential for CPU consumption to
4669 introduce observable timing patterns, we are treating this as a
4670 high-severity security issue. Fixes bug 33119; bugfix on
4671 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4672 as TROVE-2020-002 and CVE-2020-10592.
4674 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4675 - Correct how we use libseccomp. Particularly, stop assuming that
4676 rules are applied in a particular order or that more rules are
4677 processed after the first match. Neither is the case! In
4678 libseccomp <2.4.0 this lead to some rules having no effect.
4679 libseccomp 2.4.0 changed how rules are generated, leading to a
4680 different ordering, which in turn led to a fatal crash during
4681 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4684 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4685 - Stop allowing failures on the Travis CI stem tests job. It looks
4686 like all the stem hangs we were seeing before are now fixed.
4687 Closes ticket 33075.
4689 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4690 - Lowercase the configured value of BridgeDistribution before adding
4691 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4693 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
4694 - When running Tor with an option like --verify-config or
4695 --dump-config that does not start the event loop, avoid crashing
4696 if we try to exit early because of an error. Fixes bug 32407;
4697 bugfix on 0.3.3.1-alpha.
4699 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4700 - If we encounter a bug when flushing a buffer to a TLS connection,
4701 only log the bug once per invocation of the Tor process.
4702 Previously we would log with every occurrence, which could cause
4703 us to run out of disk space. Fixes bug 33093; bugfix
4706 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4707 - Fix an assertion failure that could result from a corrupted
4708 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4709 bugfix on 0.3.3.1-alpha. This issue is also tracked
4712 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4713 - Fix a syntax warning given by newer versions of Rust that was
4714 creating problems for our continuous integration. Fixes bug 33212;
4715 bugfix on 0.3.5.1-alpha.
4717 o Testing (backport from 0.4.3.1-alpha):
4718 - Re-enable the Travis CI macOS Chutney build, but don't let it
4719 prevent the Travis job from finishing. (The Travis macOS jobs are
4720 slow, so we don't want to have it delay the whole CI process.)
4721 Closes ticket 32629.
4722 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4723 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4724 fix the sandbox errors in 32722. Closes ticket 32240.
4726 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4727 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4729 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4730 - Remove a redundant distcheck job. Closes ticket 33194.
4731 - Sort the Travis jobs in order of speed: putting the slowest jobs
4732 first takes full advantage of Travis job concurrency. Closes
4734 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4735 previously configured to fast_finish (which requires
4736 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4737 tool to produce detailed diagnostic output. Closes ticket 32792.
4740 Changes in version 0.4.3.2-alpha - 2020-02-10
4741 This is the second stable alpha release in the Tor 0.4.3.x series. It
4742 fixes several bugs present in the previous alpha release. Anybody
4743 running the previous alpha should upgrade, and look for bugs in this
4746 o Major bugfixes (onion service client, authorization):
4747 - On a NEWNYM signal, purge entries from the ephemeral client
4748 authorization cache. The permanent ones are kept. Fixes bug 33139;
4749 bugfix on 0.4.3.1-alpha.
4751 o Minor features (best practices tracker):
4752 - Practracker now supports a --regen-overbroad option to regenerate
4753 the exceptions file, but only to revise exceptions to be _less_
4754 tolerant of best-practices violations. Closes ticket 32372.
4756 o Minor features (continuous integration):
4757 - Run Doxygen Makefile target on Travis, so we can learn about
4758 regressions in our internal documentation. Closes ticket 32455.
4759 - Stop allowing failures on the Travis CI stem tests job. It looks
4760 like all the stem hangs we were seeing before are now fixed.
4761 Closes ticket 33075.
4763 o Minor bugfixes (build system):
4764 - Revise configure options that were either missing or incorrect in
4765 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
4767 o Minor bugfixes (controller protocol):
4768 - Fix a memory leak introduced by refactoring of control reply
4769 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
4770 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
4772 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
4773 report them as SIGNAL events. Previously we would log a bug
4774 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
4776 o Minor bugfixes (logging):
4777 - If we encounter a bug when flushing a buffer to a TLS connection,
4778 only log the bug once per invocation of the Tor process.
4779 Previously we would log with every occurrence, which could cause
4780 us to run out of disk space. Fixes bug 33093; bugfix
4782 - When logging a bug, do not say "Future instances of this warning
4783 will be silenced" unless we are actually going to silence them.
4784 Previously we would say this whenever a BUG() check failed in the
4785 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
4787 o Minor bugfixes (onion service v2):
4788 - Move a series of v2 onion service warnings to protocol-warning
4789 level because they can all be triggered remotely by a malformed
4790 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
4792 o Minor bugfixes (onion service v3, client authorization):
4793 - When removing client authorization credentials using the control
4794 port, also remove the associated descriptor, so the onion service
4795 can no longer be contacted. Fixes bug 33148; bugfix
4798 o Minor bugfixes (pluggable transports):
4799 - When receiving a message on standard error from a pluggable
4800 transport, log it at info level, rather than as a warning. Fixes
4801 bug 33005; bugfix on 0.4.0.1-alpha.
4803 o Minor bugfixes (rust, build):
4804 - Fix a syntax warning given by newer versions of Rust that was
4805 creating problems for our continuous integration. Fixes bug 33212;
4806 bugfix on 0.3.5.1-alpha.
4808 o Minor bugfixes (TLS bug handling):
4809 - When encountering a bug in buf_read_from_tls(), return a "MISC"
4810 error code rather than "WANTWRITE". This change might help avoid
4811 some CPU-wasting loops if the bug is ever triggered. Bug reported
4812 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
4814 o Code simplification and refactoring (mainloop):
4815 - Simplify the ip_address_changed() function by removing redundant
4816 checks. Closes ticket 33091.
4818 o Documentation (manpage):
4819 - Split "Circuit Timeout" options and "Node Selection" options into
4820 their own sections of the tor manpage. Closes tickets 32928 and
4821 32929. Work by Swati Thacker as part of Google Season of Docs.
4824 Changes in version 0.4.2.6 - 2020-01-30
4825 This is the second stable release in the 0.4.2.x series. It backports
4826 several bugfixes from 0.4.3.1-alpha, including some that had affected
4827 the Linux seccomp2 sandbox or Windows services. If you're running with
4828 one of those configurations, you'll probably want to upgrade;
4829 otherwise, you should be fine with 0.4.2.5.
4831 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4832 - Correct how we use libseccomp. Particularly, stop assuming that
4833 rules are applied in a particular order or that more rules are
4834 processed after the first match. Neither is the case! In
4835 libseccomp <2.4.0 this led to some rules having no effect.
4836 libseccomp 2.4.0 changed how rules are generated, leading to a
4837 different ordering, which in turn led to a fatal crash during
4838 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4840 - Fix crash when reloading logging configuration while the
4841 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4842 0.4.1.7. Patch by Peter Gerber.
4844 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
4845 - Use GCC/Clang's printf-checking feature to make sure that
4846 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4847 bugfix on 0.4.1.1-alpha.
4849 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
4850 - Avoid a possible crash when trying to log a (fatal) assertion
4851 failure about mismatched magic numbers in configuration objects.
4852 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4854 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
4855 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4856 test_practracker.sh script. Doing so caused a test failure. Fixes
4857 bug 32705; bugfix on 0.4.2.1-alpha.
4858 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4859 skipping practracker checks. Fixes bug 32705; bugfix
4862 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4863 - Initialize the publish/subscribe system when running as a windows
4864 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4866 o Testing (backport from 0.4.3.1-alpha):
4867 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4868 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4869 fix the sandbox errors in 32722. Closes ticket 32240.
4870 - Re-enable the Travis CI macOS Chutney build, but don't let it
4871 prevent the Travis job from finishing. (The Travis macOS jobs are
4872 slow, so we don't want to have it delay the whole CI process.)
4873 Closes ticket 32629.
4875 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4876 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4879 Changes in version 0.4.1.8 - 2020-01-30
4880 This release backports several bugfixes from later release series,
4881 including some that had affected the Linux seccomp2 sandbox or Windows
4882 services. If you're running with one of those configurations, you'll
4883 probably want to upgrade; otherwise, you should be fine with your
4884 current version of 0.4.1.x.
4886 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4887 - Correct how we use libseccomp. Particularly, stop assuming that
4888 rules are applied in a particular order or that more rules are
4889 processed after the first match. Neither is the case! In
4890 libseccomp <2.4.0 this led to some rules having no effect.
4891 libseccomp 2.4.0 changed how rules are generated, leading to a
4892 different ordering, which in turn led to a fatal crash during
4893 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4895 - Fix crash when reloading logging configuration while the
4896 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4897 0.4.1.7. Patch by Peter Gerber.
4899 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
4900 - When running Tor with an option like --verify-config or
4901 --dump-config that does not start the event loop, avoid crashing
4902 if we try to exit early because of an error. Fixes bug 32407;
4903 bugfix on 0.3.3.1-alpha.
4905 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4906 - Initialize the publish/subscribe system when running as a windows
4907 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4909 o Testing (backport from 0.4.3.1-alpha):
4910 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4911 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4912 fix the sandbox errors in 32722. Closes ticket 32240.
4913 - Re-enable the Travis CI macOS Chutney build, but don't let it
4914 prevent the Travis job from finishing. (The Travis macOS jobs are
4915 slow, so we don't want to have it delay the whole CI process.)
4916 Closes ticket 32629.
4918 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4919 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4922 Changes in version 0.4.3.1-alpha - 2020-01-22
4923 This is the first alpha release in the 0.4.3.x series. It includes
4924 improved support for application integration of onion services, support
4925 for building in a client-only mode, and newly improved internal
4926 documentation (online at https://src-ref.docs.torproject.org/tor/). It
4927 also has numerous other small bugfixes and features, as well as
4928 improvements to our code's internal organization that should help us
4929 write better code in the future.
4931 o New system requirements:
4932 - When building Tor, you now need to have Python 3 in order to run
4933 the integration tests. (Python 2 is officially unsupported
4934 upstream, as of 1 Jan 2020.) Closes ticket 32608.
4936 o Major features (build system):
4937 - The relay code can now be disabled using the --disable-module-relay
4938 configure option. When this option is set, we also disable the
4939 dirauth module. Closes ticket 32123.
4940 - When Tor is compiled --disable-module-relay, we also omit the code
4941 used to act as a directory cache. Closes ticket 32487.
4943 o Major features (directory authority, ed25519):
4944 - Add support for banning a relay's ed25519 keys in the approved-
4945 routers file. This will help us migrate away from RSA keys in the
4946 future. Previously, only RSA keys could be banned in approved-
4947 routers. Resolves ticket 22029. Patch by Neel Chauhan.
4949 o Major features (onion service, controller):
4950 - New control port commands to manage client-side onion service
4951 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
4952 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
4953 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
4955 o Major features (onion service, SOCKS5):
4956 - Introduce a new SocksPort flag, ExtendedErrors, to support more
4957 detailed error codes in information for applications that support
4958 them. Closes ticket 30382; implements proposal 304.
4960 o Major features (proxy):
4961 - In addition to its current supported proxy types (HTTP CONNECT,
4962 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
4963 HAProxy server. A new torrc option was added to specify the
4964 address/port of the server: TCPProxy <protocol> <host>:<port>.
4965 Currently the only supported protocol for the option is haproxy.
4966 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
4968 o Major bugfixes (linux seccomp sandbox):
4969 - Correct how we use libseccomp. Particularly, stop assuming that
4970 rules are applied in a particular order or that more rules are
4971 processed after the first match. Neither is the case! In
4972 libseccomp <2.4.0 this led to some rules having no effect.
4973 libseccomp 2.4.0 changed how rules are generated, leading to a
4974 different ordering, which in turn led to a fatal crash during
4975 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4977 - Fix crash when reloading logging configuration while the
4978 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4979 0.4.1.7. Patch by Peter Gerber.
4981 o Major bugfixes (networking):
4982 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
4983 and accept strings as well as binary addresses. Fixes bug 32315;
4984 bugfix on 0.3.5.1-alpha.
4986 o Major bugfixes (onion service):
4987 - Report HS circuit failure back into the HS subsystem so we take
4988 appropriate action with regards to the client introduction point
4989 failure cache. This improves reachability of onion services, since
4990 now clients notice failing introduction circuits properly. Fixes
4991 bug 32020; bugfix on 0.3.2.1-alpha.
4993 o Minor feature (configure, build system):
4994 - Output a list of enabled/disabled features at the end of the
4995 configure process in a pleasing way. Closes ticket 31373.
4997 o Minor feature (heartbeat, onion service):
4998 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
4999 message. Closes ticket 31371.
5001 o Minor features (configuration validation):
5002 - Configuration validation can now be done by per-module callbacks,
5003 rather than a global validation function. This will let us reduce
5004 the size of config.c and some of its more cumbersome functions.
5005 Closes ticket 31241.
5007 o Minor features (configuration):
5008 - If a configured hardware crypto accelerator in AccelName is
5009 prefixed with "!", Tor now exits when it cannot be found. Closes
5011 - We now use flag-driven logic to warn about obsolete configuration
5012 fields, so that we can include their names. In 0.4.2, we used a
5013 special type, which prevented us from generating good warnings.
5014 Implements ticket 32404.
5016 o Minor features (controller):
5017 - Add stream isolation data to STREAM event. Closes ticket 19859.
5018 - Implement a new GETINFO command to fetch microdescriptor
5019 consensus. Closes ticket 31684.
5021 o Minor features (debugging, directory system):
5022 - Don't crash when we find a non-guard with a guard-fraction value
5023 set. Instead, log a bug warning, in an attempt to figure out how
5024 this happened. Diagnostic for ticket 32868.
5026 o Minor features (defense in depth):
5027 - Add additional checks around tor_vasprintf() usage, in case the
5028 function returns an error. Patch by Tobias Stoeckmann. Fixes
5031 o Minor features (developer tooling):
5032 - Remove the 0.2.9.x series branches from git scripts (git-merge-
5033 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
5034 Closes ticket 32772.
5036 o Minor features (developer tools):
5037 - Add a check_cocci_parse.sh script that checks that new code is
5038 parseable by Coccinelle. Add an exceptions file for unparseable
5039 files, and run the script from travis CI. Closes ticket 31919.
5040 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
5041 target. Closes ticket 31919.
5042 - Add a rename_c_identifiers.py tool to rename a bunch of C
5043 identifiers at once, and generate a well-formed commit message
5044 describing the change. This should help with refactoring. Closes
5046 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
5047 semantic patching tool with the correct flags. These flags are
5048 fairly easy to forget, and these scripts should help us use
5049 Coccinelle more effectively in the future. Closes ticket 31705.
5051 o Minor features (Doxygen):
5052 - Update Doxygen configuration file to a more recent template (from
5053 1.8.15). Closes ticket 32110.
5054 - "make doxygen" now works with out-of-tree builds. Closes
5056 - Make sure that doxygen outputs documentation for all of our C
5057 files. Previously, some were missing @file declarations, causing
5058 them to be ignored. Closes ticket 32307.
5059 - Our "make doxygen" target now respects --enable-fatal-warnings by
5060 default, and does not warn about items that are missing
5061 documentation. To warn about missing documentation, run configure
5062 with the "--enable-missing-doc-warnings" flag: doing so suspends
5063 fatal warnings for doxygen. Closes ticket 32385.
5065 o Minor features (git scripts):
5066 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
5067 customisation. Closes ticket 32347.
5068 - Add git-setup-dirs.sh, which sets up an upstream git repository
5069 and worktrees for tor maintainers. Closes ticket 29603.
5070 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
5071 remote. Closes ticket 32347.
5072 - Call the check_cocci_parse.sh script from the git commit and push
5073 hooks. Closes ticket 31919.
5074 - Make git-push-all.sh skip unchanged branches when pushing to
5075 upstream. The script already skipped unchanged test branches.
5076 Closes ticket 32216.
5077 - Make git-setup-dirs.sh create a master symlink in the worktree
5078 directory. Closes ticket 32347.
5079 - Skip unmodified source files when doing some existing git hook
5080 checks. Related to ticket 31919.
5082 o Minor features (IPv6, client):
5083 - Make Tor clients tell dual-stack exits that they prefer IPv6
5084 connections. This change is equivalent to setting the PreferIPv6
5085 flag on SOCKSPorts (and most other listener ports). Tor Browser
5086 has been setting this flag for some time, and we want to remove a
5087 client distinguisher at exits. Closes ticket 32637.
5089 o Minor features (portability, android):
5090 - When building for Android, disable some tests that depend on $HOME
5091 and/or pwdb, which Android doesn't have. Closes ticket 32825.
5092 Patch from Hans-Christoph Steiner.
5094 o Minor features (relay modularity):
5095 - Split the relay and server pluggable transport config code into
5096 separate files in the relay module. Disable this code when the
5097 relay module is disabled. Closes part of ticket 32213.
5098 - When the relay module is disabled, reject attempts to set the
5099 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
5100 ServerTransport* options, rather than ignoring the values of these
5101 options. Closes part of ticket 32213.
5103 o Minor features (relay):
5104 - When the relay module is disabled, change the default config so
5105 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
5107 o Minor features (release tools):
5108 - Port our ChangeLog formatting and sorting tools to Python 3.
5109 Closes ticket 32704.
5111 o Minor features (testing):
5112 - Detect some common failure cases for test_parseconf.sh in
5113 src/test/conf_failures. Closes ticket 32451.
5114 - Allow test_parseconf.sh to test expected log outputs for successful
5115 configs, as well as failed configs. Closes ticket 32451.
5116 - The test_parseconf.sh script now supports result variants for any
5117 combination of the optional libraries lzma, nss, and zstd. Closes
5120 o Minor features (tests, Android):
5121 - When running the unit tests on Android, create temporary files in
5122 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
5123 patch from Hans-Christoph Steiner.
5125 o Minor bugfixes (bridges):
5126 - Lowercase the configured value of BridgeDistribution before adding
5127 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
5129 o Minor bugfixes (build system):
5130 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
5131 bugfix on 0.4.1.2-alpha.
5133 o Minor bugfixes (configuration handling):
5134 - Make control_event_conf_changed() take in a config_line_t instead
5135 of a smartlist of alternating key/value entries. Fixes bug 31531;
5136 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
5138 o Minor bugfixes (configuration):
5139 - Check for multiplication overflow when parsing memory units inside
5140 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
5141 - When dumping the configuration, stop adding a trailing space after
5142 the option name when there is no option value. This issue only
5143 affects options that accept an empty value or list. (Most options
5144 reject empty values, or delete the entire line from the dumped
5145 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
5146 - Avoid changing the user's value of HardwareAccel as stored by
5147 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
5148 bug 32382; bugfix on 0.2.2.1-alpha.
5149 - When creating a KeyDirectory with the same location as the
5150 DataDirectory (not recommended), respect the DataDirectory's
5151 group-readable setting if one has not been set for the
5152 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
5154 o Minor bugfixes (controller):
5155 - In routerstatus_has_changed(), check all the fields that are
5156 output over the control port. Fixes bug 20218; bugfix
5159 o Minor bugfixes (correctness checks):
5160 - Use GCC/Clang's printf-checking feature to make sure that
5161 tor_assertf() arguments are correctly typed. Fixes bug 32765;
5162 bugfix on 0.4.1.1-alpha.
5164 o Minor bugfixes (developer tools):
5165 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
5166 31336; bugfix on 0.4.1.2-alpha.
5168 o Minor bugfixes (dirauth module):
5169 - Split the dirauth config code into a separate file in the dirauth
5170 module. Disable this code when the dirauth module is disabled.
5171 Closes ticket 32213.
5172 - When the dirauth module is disabled, reject attempts to set the
5173 AuthoritativeDir option, rather than ignoring the value of the
5174 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
5176 o Minor bugfixes (embedded Tor):
5177 - When starting Tor any time after the first time in a process,
5178 register the thread in which it is running as the main thread.
5179 Previously, we only did this on Windows, which could lead to bugs
5180 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
5183 o Minor bugfixes (git scripts):
5184 - Avoid sleeping before the last push in git-push-all.sh. Closes
5186 - Forward all unrecognised arguments in git-push-all.sh to git push.
5187 Closes ticket 32216.
5189 o Minor bugfixes (hidden service v3):
5190 - Do not rely on a "circuit established" flag for intro circuits but
5191 instead always query the HS circuit map. This is to avoid sync
5192 issue with that flag and the map. Fixes bug 32094; bugfix
5195 o Minor bugfixes (logging, crash):
5196 - Avoid a possible crash when trying to log a (fatal) assertion
5197 failure about mismatched magic numbers in configuration objects.
5198 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
5200 o Minor bugfixes (onion service v2):
5201 - When sending the INTRO cell for a v2 Onion Service, look at the
5202 failure cache alongside timeout values to check if the intro point
5203 is marked as failed. Previously, we only looked at the relay
5204 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
5207 o Minor bugfixes (onion services v3, client):
5208 - Properly handle the client rendezvous circuit timeout. Previously
5209 Tor would sometimes timeout a rendezvous circuit awaiting the
5210 introduction ACK, and find itself unable to re-establish all
5211 circuits because the rendezvous circuit timed out too early. Fixes
5212 bug 32021; bugfix on 0.3.2.1-alpha.
5214 o Minor bugfixes (onion services):
5215 - In cancel_descriptor_fetches(), use
5216 connection_list_by_type_purpose() instead of
5217 connection_list_by_type_state(). Fixes bug 32639; bugfix on
5218 0.3.2.1-alpha. Patch by Neel Chauhan.
5220 o Minor bugfixes (scripts):
5221 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
5222 bugfix on 0.4.0.1-alpha.
5224 o Minor bugfixes (test):
5225 - Use the same code to find the tor binary in all of our test
5226 scripts. This change makes sure we are always using the coverage
5227 binary when coverage is enabled. Fixes bug 32368; bugfix
5230 o Minor bugfixes (testing):
5231 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
5232 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
5233 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
5234 test_practracker.sh script. Doing so caused a test failure. Fixes
5235 bug 32705; bugfix on 0.4.2.1-alpha.
5236 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
5237 skipping practracker checks. Fixes bug 32705; bugfix
5240 o Minor bugfixes (tests):
5241 - Our option-validation tests no longer depend on specially
5242 configured non-default, non-passing sets of options. Previously,
5243 the tests had been written to assume that options would _not_ be
5244 set to their defaults, which led to needless complexity and
5245 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
5247 o Minor bugfixes (windows service):
5248 - Initialize the publish/subscribe system when running as a windows
5249 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
5251 o Deprecated features:
5252 - Deprecate the ClientAutoIPv6ORPort option. This option was not
5253 true "Happy Eyeballs", and often failed on connections that
5254 weren't reliably dual-stack. Closes ticket 32942. Patch by
5258 - Provide a quickstart guide for a Circuit Padding Framework, and
5259 documentation for researchers to implement and study circuit
5260 padding machines. Closes ticket 28804.
5261 - Add documentation in 'HelpfulTools.md' to describe how to build a
5262 tag file. Closes ticket 32779.
5263 - Create a high-level description of the long-term software
5264 architecture goals. Closes ticket 32206.
5265 - Describe the --dump-config command in the manual page. Closes
5267 - Unite coding advice from this_not_that.md in torguts repo into our
5268 coding standards document. Resolves ticket 31853.
5271 - Our Doxygen configuration no longer generates LaTeX output. The
5272 reference manual produced by doing this was over 4000 pages long,
5273 and generally unusable. Closes ticket 32099.
5274 - The option "TestingEstimatedDescriptorPropagationTime" is now
5275 marked as obsolete. It has had no effect since 0.3.0.7, when
5276 clients stopped rejecting consensuses "from the future". Closes
5278 - We no longer support consensus methods before method 28; these
5279 methods were only used by authorities running versions of Tor that
5280 are now at end-of-life. In effect, this means that clients,
5281 relays, and authorities now assume that authorities will be
5282 running version 0.3.5.x or later. Closes ticket 32695.
5285 - Add more test cases for tor's UTF-8 validation function. Also,
5286 check the arguments passed to the function for consistency. Closes
5288 - Improve test coverage for relay and dirauth config code, focusing
5289 on option validation and normalization. Closes ticket 32213.
5290 - Improve the consistency of test_parseconf.sh output, and run all
5291 the tests, even if one fails. Closes ticket 32213.
5292 - Re-enable the Travis CI macOS Chutney build, but don't let it
5293 prevent the Travis job from finishing. (The Travis macOS jobs are
5294 slow, so we don't want to have it delay the whole CI process.)
5295 Closes ticket 32629.
5296 - Run the practracker unit tests in the pre-commit git hook. Closes
5298 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
5299 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
5300 fix the sandbox errors in 32722. Closes ticket 32240.
5302 o Code simplification and refactoring (channel):
5303 - Channel layer had a variable length cell handler that was not used
5304 and thus removed. Closes ticket 32892.
5306 o Code simplification and refactoring (configuration):
5307 - Immutability is now implemented as a flag on individual
5308 configuration options rather than as part of the option-transition
5309 checking code. Closes ticket 32344.
5310 - Instead of keeping a list of configuration options to check for
5311 relative paths, check all the options whose type is "FILENAME".
5312 Solves part of ticket 32339.
5313 - Our default log (which ordinarily sends NOTICE-level messages to
5314 standard output) is now handled in a more logical manner.
5315 Previously, we replaced the configured log options if they were
5316 empty. Now, we interpret an empty set of log options as meaning
5317 "use the default log". Closes ticket 31999.
5318 - Remove some unused arguments from the options_validate() function,
5319 to simplify our code and tests. Closes ticket 32187.
5320 - Simplify the options_validate() code so that it looks at the
5321 default options directly, rather than taking default options as an
5322 argument. This change lets us simplify its interface. Closes
5324 - Use our new configuration architecture to move most authority-
5325 related options to the directory authority module. Closes
5327 - When parsing the command line, handle options that determine our
5328 "quiet level" and our mode of operation (e.g., --dump-config and
5329 so on) all in one table. Closes ticket 32003.
5331 o Code simplification and refactoring (controller):
5332 - Create a new abstraction for formatting control protocol reply
5333 lines based on key-value pairs. Refactor some existing control
5334 protocol code to take advantage of this. Closes ticket 30984.
5335 - Create a helper function that can fetch network status or
5336 microdesc consensuses. Closes ticket 31684.
5338 o Code simplification and refactoring (dirauth modularization):
5339 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
5340 Closes ticket 32163.
5341 - Replace some confusing identifiers in process_descs.c. Closes
5343 - Simplify some relay and dirauth config code. Closes ticket 32213.
5345 o Code simplification and refactoring (misc):
5346 - Make all the structs we declare follow the same naming convention
5347 of ending with "_t". Closes ticket 32415.
5348 - Move and rename some configuration-related code for clarity.
5349 Closes ticket 32304.
5350 - Our include.am files are now broken up by subdirectory.
5351 Previously, src/core/include.am covered all of the subdirectories
5352 in "core", "feature", and "app". Closes ticket 32137.
5353 - Remove underused NS*() macros from test code: they make our tests
5354 more confusing, especially for code-formatting tools. Closes
5357 o Code simplification and refactoring (relay modularization):
5358 - Disable relay_periodic when the relay module is disabled. Closes
5360 - Disable relay_sys when the relay module is disabled. Closes
5363 o Code simplification and refactoring (tool support):
5364 - Add numerous missing dependencies to our include files, so that
5365 they can be included in different reasonable orders and still
5366 compile. Addresses part of ticket 32764.
5367 - Fix some parts of our code that were difficult for Coccinelle to
5368 parse. Related to ticket 31705.
5369 - Fix some small issues in our code that prevented automatic
5370 formatting tools from working. Addresses part of ticket 32764.
5372 o Documentation (manpage):
5373 - Alphabetize the Client Options section of the tor manpage. Closes
5375 - Alphabetize the General Options section of the tor manpage. Closes
5377 - In the tor(1) manpage, reword and improve formatting of the
5378 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
5379 32277. Based on work by Swati Thacker as part of Google Season
5381 - In the tor(1) manpage, reword and improve formatting of the FILES,
5382 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
5383 Swati Thacker as part of Google Season of Docs.
5385 o Testing (circuit, EWMA):
5386 - Add unit tests for circuitmux and EWMA subsystems. Closes
5389 o Testing (continuous integration):
5390 - Use zstd in our Travis Linux builds. Closes ticket 32242.
5393 Changes in version 0.4.2.5 - 2019-12-09
5394 This is the first stable release in the 0.4.2.x series. This series
5395 improves reliability and stability, and includes several stability and
5396 correctness improvements for onion services. It also fixes many smaller
5397 bugs present in previous series.
5399 Per our support policy, we will support the 0.4.2.x series for nine
5400 months, or until three months after the release of a stable 0.4.3.x:
5401 whichever is longer. If you need longer-term support, please stick
5402 with 0.3.5.x, which will we plan to support until Feb 2022.
5404 Per our support policy, we will support the 0.4.2.x series for nine
5405 months, or until three months after the release of a stable 0.4.3.x:
5406 whichever is longer. If you need longer-term support, please stick
5407 with 0.3.5.x, which will we plan to support until Feb 2022.
5409 Below are the changes since 0.4.1.4-rc. For a complete list of changes
5410 since 0.4.1.5, see the ReleaseNotes file.
5412 o Minor features (geoip):
5413 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5414 Country database. Closes ticket 32685.
5417 - Require C99 standards-conforming code in Travis CI, but allow GNU
5418 gcc extensions. Also activates clang's -Wtypedef-redefinition
5419 warnings. Build some jobs with -std=gnu99, and some jobs without.
5420 Closes ticket 32500.
5423 Changes in version 0.4.1.7 - 2019-12-09
5424 This release backports several bugfixes to improve stability and
5425 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
5426 including all relays relying on AccountingMax, should upgrade.
5428 o Major features (directory authorities, backport from 0.4.2.2-alpha):
5429 - Directory authorities now reject relays running all currently
5430 deprecated release series. The currently supported release series
5431 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
5433 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
5434 - Avoid a possible crash when restarting Tor in embedded mode and
5435 enabling a different set of publish/subscribe messages. Fixes bug
5436 31898; bugfix on 0.4.1.1-alpha.
5438 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5439 - Relays now respect their AccountingMax bandwidth again. When
5440 relays entered "soft" hibernation (which typically starts when
5441 we've hit 90% of our AccountingMax), we had stopped checking
5442 whether we should enter hard hibernation. Soft hibernation refuses
5443 new connections and new circuits, but the existing circuits can
5444 continue, meaning that relays could have exceeded their configured
5445 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5447 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5448 - Stop ignoring torrc options after an %include directive, when the
5449 included directory ends with a file that does not contain any
5450 config options (but does contain comments or whitespace). Fixes
5451 bug 31408; bugfix on 0.3.1.1-alpha.
5453 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5454 - Onion services now always use the exact number of intro points
5455 configured with the HiddenServiceNumIntroductionPoints option (or
5456 fewer if nodes are excluded). Before, a service could sometimes
5457 pick more intro points than configured. Fixes bug 31548; bugfix
5460 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5461 - When building on Appveyor and Travis, pass the "-k" flag to make,
5462 so that we are informed of all compilation failures, not just the
5463 first one or two. Closes ticket 31372.
5465 o Minor features (geoip, backport from 0.4.2.5):
5466 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5467 Country database. Closes ticket 32685.
5469 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5470 - Avoid spurious errors when Appveyor CI fails before the install step.
5471 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5473 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5474 - Fix a BUG() assertion that occurs within a very small race window
5475 between when a client intro circuit opens and when its descriptor
5476 gets cleaned up from the cache. The circuit is now closed early,
5477 which will trigger a re-fetch of the descriptor and continue the
5478 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5480 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5481 - Avoid trying to read data from closed connections, which can cause
5482 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5483 30344; bugfix on 0.1.1.1-alpha.
5485 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5486 - On abort, try harder to flush the output buffers of log messages.
5487 On some platforms (macOS), log messages could be discarded when
5488 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5489 - Report the tor version whenever an assertion fails. Previously, we
5490 only reported the Tor version on some crashes, and some non-fatal
5491 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5492 - When tor aborts due to an error, close log file descriptors before
5493 aborting. Closing the logs makes some OSes flush log file buffers,
5494 rather than deleting buffered log lines. Fixes bug 31594; bugfix
5497 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5498 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5499 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5500 - Disable backtrace signal handlers when shutting down tor. Fixes
5501 bug 31614; bugfix on 0.2.5.2-alpha.
5502 - Rate-limit the logging message about the obsolete .exit
5503 notation. Previously, there was no limit on this warning, which
5504 could potentially be triggered many times by a hostile website.
5505 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5507 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5508 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5509 cell on a connection using the obsolete v1 link protocol. Log a
5510 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5512 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5513 - Reset the periodic events' "enabled" flag when Tor is shut down
5514 cleanly. Previously, this flag was left on, which caused periodic
5515 events not to be re-enabled when Tor was relaunched in-process
5516 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5519 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
5520 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5521 31736; bugfix on 0.0.7.
5523 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5524 - Remove overly strict assertions that triggered when a pluggable
5525 transport failed to launch. Fixes bug 31091; bugfix
5527 - Remove an assertion in the Unix process backend. This assertion
5528 would trigger when we failed to find the executable for a child
5529 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5531 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5532 - Avoid crashing when starting with a corrupt keys directory where
5533 the old ntor key and the new ntor key are identical. Fixes bug
5534 30916; bugfix on 0.2.4.8-alpha.
5536 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5537 - When testing port rebinding, don't busy-wait for tor to log.
5538 Instead, actually sleep for a short time before polling again.
5539 Also improve the formatting of control commands and log messages.
5540 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5542 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
5543 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5544 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5546 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5547 - Log bugs about the TLS read buffer's length only once, rather than
5548 filling the logs with similar warnings. Fixes bug 31939; bugfix
5551 o Documentation (backport from 0.4.2.2-alpha):
5552 - Explain why we can't destroy the backtrace buffer mutex. Explain
5553 why we don't need to destroy the log mutex. Closes ticket 31736.
5555 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5556 - Disable all but one Travis CI macOS build, to mitigate slow
5557 scheduling of Travis macOS jobs. Closes ticket 32177.
5558 - Run the chutney IPv6 networks as part of Travis CI. Closes
5560 - Simplify the Travis CI build matrix, and optimise for build time.
5561 Closes ticket 31859.
5562 - Use Windows Server 2019 instead of Windows Server 2016 in our
5563 Appveyor builds. Closes ticket 32086.
5565 o Testing (continuous integration, backport from 0.4.2.4-rc):
5566 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5567 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5568 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5569 until we can fix some Bionic permissions issues (see ticket
5570 32240). Related to ticket 31919.
5571 - Install the mingw OpenSSL package in Appveyor. This makes sure
5572 that the OpenSSL headers and libraries match in Tor's Appveyor
5573 builds. (This bug was triggered by an Appveyor image update.)
5574 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5576 o Testing (continuous integration, backport from 0.4.2.5):
5577 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5578 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5579 Build some jobs with -std=gnu99, and some jobs without.
5580 Closes ticket 32500.
5583 Changes in version 0.4.0.6 - 2019-12-09
5584 This is the second stable release in the 0.4.0.x series. This release
5585 backports several bugfixes to improve stability and correctness. Anyone
5586 experiencing build problems or crashes with 0.4.0.5, including all relays
5587 relying on AccountingMax, should upgrade.
5589 Note that, per our support policy, support for the 0.4.0.x series will end
5590 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
5591 latest stable release, or downgrade to 0.3.5.x, which will get long-term
5592 support until 1 Feb 2022.
5594 o Directory authority changes (backport from 0.4.1.5):
5595 - The directory authority "dizum" has a new IP address. Closes
5598 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5599 - Consider our directory information to have changed when our list
5600 of bridges changes. Previously, Tor would not re-compute the
5601 status of its directory information when bridges changed, and
5602 therefore would not realize that it was no longer able to build
5603 circuits. Fixes part of bug 29875.
5604 - Do not count previously configured working bridges towards our
5605 total of working bridges. Previously, when Tor's list of bridges
5606 changed, it would think that the old bridges were still usable,
5607 and delay fetching router descriptors for the new ones. Fixes part
5608 of bug 29875; bugfix on 0.3.0.1-alpha.
5610 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5611 - When considering upgrading circuits from "waiting for guard" to
5612 "open", always ignore circuits that are marked for close. Otherwise,
5613 we can end up in the situation where a subsystem is notified that
5614 a closing circuit has just opened, leading to undesirable
5615 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5617 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5618 - Properly clean up the introduction point map when circuits change
5619 purpose from onion service circuits to pathbias, measurement, or
5620 other circuit types. This should fix some service-side instances
5621 of introduction point failure. Fixes bug 29034; bugfix
5624 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5625 - Fix an unreachable bug in which an introduction point could try to
5626 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5627 to encode, leading the relay to assert(). We've consolidated the
5628 ABI values into Trunnel now. Fixes bug 30454; bugfix
5630 - Clients can now handle unknown status codes from INTRODUCE_ACK
5631 cells. (The NACK behavior will stay the same.) This will allow us
5632 to extend status codes in the future without breaking the normal
5633 client behavior. Fixes another part of bug 30454; bugfix
5636 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5637 - Relays now respect their AccountingMax bandwidth again. When
5638 relays entered "soft" hibernation (which typically starts when
5639 we've hit 90% of our AccountingMax), we had stopped checking
5640 whether we should enter hard hibernation. Soft hibernation refuses
5641 new connections and new circuits, but the existing circuits can
5642 continue, meaning that relays could have exceeded their configured
5643 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5645 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5646 - Stop ignoring torrc options after an %include directive, when the
5647 included directory ends with a file that does not contain any
5648 config options (but does contain comments or whitespace). Fixes
5649 bug 31408; bugfix on 0.3.1.1-alpha.
5651 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5652 - Onion services now always use the exact number of intro points
5653 configured with the HiddenServiceNumIntroductionPoints option (or
5654 fewer if nodes are excluded). Before, a service could sometimes
5655 pick more intro points than configured. Fixes bug 31548; bugfix
5658 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5659 - Add a "--list-modules" command to print a list of which compile-
5660 time modules are enabled. Closes ticket 30452.
5662 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5663 - Remove sudo configuration lines from .travis.yml as they are no
5664 longer needed with current Travis build environment. Resolves
5667 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5668 - Our Travis configuration now uses Chutney to run some network
5669 integration tests automatically. Closes ticket 29280.
5671 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5672 - When building on Appveyor and Travis, pass the "-k" flag to make,
5673 so that we are informed of all compilation failures, not just the
5674 first one or two. Closes ticket 31372.
5676 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5677 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5678 in December 2018 (of which ~122 were still functional), with a
5679 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5680 in June 2019. Closes ticket 28795.
5682 o Minor features (geoip, backport from 0.4.2.5):
5683 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5684 Country database. Closes ticket 32685.
5686 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5687 - Change "make test-stem" so it only runs the stem tests that use
5688 tor. This change makes test-stem faster and more reliable. Closes
5691 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5692 - Avoid spurious errors when Appveyor CI fails before the install step.
5693 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5695 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5696 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5697 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5699 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5700 - Fix a logic error that prevented the SessionGroup sub-option from
5701 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5703 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
5704 - On relays, properly check that a padding machine is absent before
5705 logging a warning about it being absent. Fixes bug 30649; bugfix
5708 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5709 - Fix a BUG() assertion that occurs within a very small race window
5710 between when a client intro circuit opens and when its descriptor
5711 gets cleaned up from the cache. The circuit is now closed early,
5712 which will trigger a re-fetch of the descriptor and continue the
5713 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5715 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5716 - Don't believe clock skew results from NETINFO cells that appear to
5717 arrive before we sent the VERSIONS cells they are responding to.
5718 Previously, we would accept them up to 3 minutes "in the past".
5719 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5721 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5722 - Fix a compilation warning on Windows about casting a function
5723 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5726 o Minor bugfixes (compilation, backport from 0.4.1.5):
5727 - Avoid using labs() on time_t, which can cause compilation warnings
5728 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5730 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5731 - Suppress spurious float-conversion warnings from GCC when calling
5732 floating-point classifier functions on FreeBSD. Fixes part of bug
5733 31687; bugfix on 0.3.1.5-alpha.
5735 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5736 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5737 due to missing declarations of abort(), and prevent other such
5738 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5740 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5741 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5742 want authentication along with configured (but unused!)
5743 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5745 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5746 - Avoid trying to read data from closed connections, which can cause
5747 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5748 30344; bugfix on 0.1.1.1-alpha.
5750 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5751 - Allow the test-stem job to fail in Travis, because it sometimes
5752 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5753 - Skip test_rebind on macOS in Travis, because it is unreliable on
5754 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5755 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5756 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5758 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5759 - Avoid a set of possible code paths that could try to use freed
5760 memory in routerlist_free() while Tor was exiting. Fixes bug
5761 31003; bugfix on 0.1.2.2-alpha.
5763 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5764 - Stop crashing after parsing an unknown descriptor purpose
5765 annotation. We think this bug can only be triggered by modifying a
5766 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5768 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5769 - Move the "bandwidth-file-headers" line in directory authority
5770 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5773 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5774 - On abort, try harder to flush the output buffers of log messages.
5775 On some platforms (macOS), log messages could be discarded when
5776 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5777 - Report the tor version whenever an assertion fails. Previously, we
5778 only reported the Tor version on some crashes, and some non-fatal
5779 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5781 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5782 - When extracting an IPv6 address from a PF-based proxy, verify that
5783 we are actually configured to receive an IPv6 address, and log an
5784 internal error if not. Fixes part of bug 31687; bugfix
5787 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5788 - When tor is missing descriptors for some primary entry guards,
5789 make the log message less alarming. It's normal for descriptors to
5790 expire, as long as tor fetches new ones soon after. Fixes bug
5791 31657; bugfix on 0.3.3.1-alpha.
5793 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5794 - Do not log a warning when running with an OpenSSL version other
5795 than the one Tor was compiled with, if the two versions should be
5796 compatible. Previously, we would warn whenever the version was
5797 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5799 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5800 - Change log level of message "Hash of session info was not as
5801 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5804 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5805 - Rate-limit the logging message about the obsolete .exit
5806 notation. Previously, there was no limit on this warning, which
5807 could potentially be triggered many times by a hostile website.
5808 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5810 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5811 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5812 cell on a connection using the obsolete v1 link protocol. Log a
5813 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5815 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5816 - Reset the periodic events' "enabled" flag when Tor is shut down
5817 cleanly. Previously, this flag was left on, which caused periodic
5818 events not to be re-enabled when Tor was relaunched in-process
5819 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5822 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5823 - Avoid a minor memory leak that could occur on relays when failing
5824 to create a "keys" directory. Fixes bug 30148; bugfix
5827 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5828 - Fix a trivial memory leak when parsing an invalid value
5829 from a download schedule in the configuration. Fixes bug
5830 30894; bugfix on 0.3.4.1-alpha.
5832 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
5833 - Fix usage of minherit() on NetBSD and other platforms that define
5834 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5835 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5837 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5838 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5839 implementation) when failing to load an onion service client
5840 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5842 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5843 - When purging the DNS cache because of an out-of-memory condition,
5844 try purging just the older entries at first. Previously, we would
5845 always purge the whole thing. Fixes bug 29617; bugfix
5848 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5849 - Avoid crashing in our tor_vasprintf() implementation on systems
5850 that define neither vasprintf() nor _vscprintf(). (This bug has
5851 been here long enough that we question whether people are running
5852 Tor on such systems, but we're applying the fix out of caution.)
5853 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5856 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5857 - Remove overly strict assertions that triggered when a pluggable
5858 transport failed to launch. Fixes bug 31091; bugfix
5860 - Remove an assertion in the Unix process backend. This assertion
5861 would trigger when we failed to find the executable for a child
5862 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5864 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5865 - Avoid crashing when starting with a corrupt keys directory where
5866 the old ntor key and the new ntor key are identical. Fixes bug
5867 30916; bugfix on 0.2.4.8-alpha.
5869 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5870 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5871 31463; bugfix on 0.3.5.4-alpha.
5873 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5874 - When testing port rebinding, don't busy-wait for tor to log.
5875 Instead, actually sleep for a short time before polling again.
5876 Also improve the formatting of control commands and log messages.
5877 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5879 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5880 - Log bugs about the TLS read buffer's length only once, rather than
5881 filling the logs with similar warnings. Fixes bug 31939; bugfix
5884 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5885 - Always retry v2 single onion service intro and rend circuits with
5886 a 3-hop path. Previously, v2 single onion services used a 3-hop
5887 path when rendezvous circuits were retried after a remote or
5888 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5889 23818; bugfix on 0.2.9.3-alpha.
5890 - Make v3 single onion services fall back to a 3-hop intro, when all
5891 intro points are unreachable via a 1-hop path. Previously, v3
5892 single onion services failed when all intro nodes were unreachable
5893 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5895 o Documentation (backport from 0.4.2.1-alpha):
5896 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5897 notice.html so that operators no longer have to host it
5898 themselves. Closes ticket 31089.
5900 o Testing (backport from 0.4.1.2-alpha):
5901 - Specify torrc paths (with empty files) when launching tor in
5902 integration tests; refrain from reading user and system torrcs.
5903 Resolves issue 29702.
5905 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5906 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5908 o Testing (continuous integration, backport from 0.4.1.5):
5909 - In Travis, make stem log a controller trace to the console, and
5910 tail stem's tor log after failure. Closes ticket 30591.
5911 - In Travis, only run the stem tests that use a tor binary. Closes
5914 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5915 - Disable all but one Travis CI macOS build, to mitigate slow
5916 scheduling of Travis macOS jobs. Closes ticket 32177.
5917 - Run the chutney IPv6 networks as part of Travis CI. Closes
5919 - Simplify the Travis CI build matrix, and optimise for build time.
5920 Closes ticket 31859.
5921 - Use Windows Server 2019 instead of Windows Server 2016 in our
5922 Appveyor builds. Closes ticket 32086.
5924 o Testing (continuous integration, backport from 0.4.2.4-rc):
5925 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5926 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5927 until we can fix some Bionic permissions issues (see ticket
5928 32240). Related to ticket 31919.
5929 - Install the mingw OpenSSL package in Appveyor. This makes sure
5930 that the OpenSSL headers and libraries match in Tor's Appveyor
5931 builds. (This bug was triggered by an Appveyor image update.)
5932 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5933 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5935 o Testing (continuous integration, backport from 0.4.2.5):
5936 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5937 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5938 Build some jobs with -std=gnu99, and some jobs without.
5939 Closes ticket 32500.
5941 Changes in version 0.3.5.9 - 2019-12-09
5942 Tor 0.3.5.9 backports serveral fixes from later releases, including
5943 several that affect bridge users, relay stability, onion services,
5946 o Directory authority changes (backport from 0.4.1.5):
5947 - The directory authority "dizum" has a new IP address. Closes
5950 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5951 - Consider our directory information to have changed when our list
5952 of bridges changes. Previously, Tor would not re-compute the
5953 status of its directory information when bridges changed, and
5954 therefore would not realize that it was no longer able to build
5955 circuits. Fixes part of bug 29875.
5956 - Do not count previously configured working bridges towards our
5957 total of working bridges. Previously, when Tor's list of bridges
5958 changed, it would think that the old bridges were still usable,
5959 and delay fetching router descriptors for the new ones. Fixes part
5960 of bug 29875; bugfix on 0.3.0.1-alpha.
5962 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5963 - When considering upgrading circuits from "waiting for guard" to
5964 "open", always ignore circuits that are marked for close. Otherwise,
5965 we can end up in the situation where a subsystem is notified that
5966 a closing circuit has just opened, leading to undesirable
5967 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5969 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
5970 - When running with NSS, disable TLS 1.2 ciphersuites that use
5971 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5972 these ciphersuites don't work -- which caused relays to fail to
5973 handshake with one another when these ciphersuites were enabled.
5974 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5976 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5977 - Properly clean up the introduction point map when circuits change
5978 purpose from onion service circuits to pathbias, measurement, or
5979 other circuit types. This should fix some service-side instances
5980 of introduction point failure. Fixes bug 29034; bugfix
5983 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5984 - Fix an unreachable bug in which an introduction point could try to
5985 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5986 to encode, leading the relay to assert(). We've consolidated the
5987 ABI values into Trunnel now. Fixes bug 30454; bugfix
5989 - Clients can now handle unknown status codes from INTRODUCE_ACK
5990 cells. (The NACK behavior will stay the same.) This will allow us
5991 to extend status codes in the future without breaking the normal
5992 client behavior. Fixes another part of bug 30454; bugfix
5995 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5996 - Stop ignoring torrc options after an %include directive, when the
5997 included directory ends with a file that does not contain any
5998 config options (but does contain comments or whitespace). Fixes
5999 bug 31408; bugfix on 0.3.1.1-alpha.
6001 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
6002 - Onion services now always use the exact number of intro points
6003 configured with the HiddenServiceNumIntroductionPoints option (or
6004 fewer if nodes are excluded). Before, a service could sometimes
6005 pick more intro points than configured. Fixes bug 31548; bugfix
6008 o Minor features (address selection, backport from 0.4.0.3-alpha):
6009 - Treat the subnet 100.64.0.0/10 as public for some purposes;
6010 private for others. This subnet is the RFC 6598 (Carrier Grade
6011 NAT) IP range, and is deployed by many ISPs as an alternative to
6012 RFC 1918 that does not break existing internal networks. Tor now
6013 blocks SOCKS and control ports on these addresses and warns users
6014 if client ports or ExtORPorts are listening on a RFC 6598 address.
6015 Closes ticket 28525. Patch by Neel Chauhan.
6017 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
6018 - Make bandwidth authorities ignore relays that are reported in the
6019 bandwidth file with the flag "vote=0". This change allows us to
6020 report unmeasured relays for diagnostic reasons without including
6021 their bandwidth in the bandwidth authorities' vote. Closes
6024 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
6025 - Add a "--list-modules" command to print a list of which compile-
6026 time modules are enabled. Closes ticket 30452.
6028 o Minor features (continuous integration, backport from 0.4.0.4-rc):
6029 - On Travis Rust builds, cleanup Rust registry and refrain from
6030 caching the "target/" directory to speed up builds. Resolves
6033 o Minor features (continuous integration, backport from 0.4.0.5):
6034 - In Travis, tell timelimit to use stem's backtrace signals, and
6035 launch python directly from timelimit, so python receives the
6036 signals from timelimit, rather than make. Closes ticket 30117.
6038 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
6039 - Remove sudo configuration lines from .travis.yml as they are no
6040 longer needed with current Travis build environment. Resolves
6043 o Minor features (continuous integration, backport from 0.4.1.4-rc):
6044 - Our Travis configuration now uses Chutney to run some network
6045 integration tests automatically. Closes ticket 29280.
6047 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
6048 - When building on Appveyor and Travis, pass the "-k" flag to make,
6049 so that we are informed of all compilation failures, not just the
6050 first one or two. Closes ticket 31372.
6052 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
6053 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
6054 in December 2018 (of which ~122 were still functional), with a
6055 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
6056 in June 2019. Closes ticket 28795.
6058 o Minor features (geoip, backport from 0.4.2.5):
6059 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
6060 Country database. Closes ticket 32685.
6062 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
6063 - Try to log an error from NSS (if there is any) and a more useful
6064 description of our situation if we are using NSS and a call to
6065 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
6067 o Minor features (stem tests, backport from 0.4.2.1-alpha):
6068 - Change "make test-stem" so it only runs the stem tests that use
6069 tor. This change makes test-stem faster and more reliable. Closes
6072 o Minor bugfixes (security, backport from 0.4.0.4-rc):
6073 - Verify in more places that we are not about to create a buffer
6074 with more than INT_MAX bytes, to avoid possible OOB access in the
6075 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
6076 fixed by Tobias Stoeckmann.
6077 - Fix a potential double free bug when reading huge bandwidth files.
6078 The issue is not exploitable in the current Tor network because
6079 the vulnerable code is only reached when directory authorities
6080 read bandwidth files, but bandwidth files come from a trusted
6081 source (usually the authorities themselves). Furthermore, the
6082 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
6083 which are not used by any of the current authorities. Fixes bug
6084 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
6087 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
6088 - Reset coverage state on disk after Travis CI has finished. This
6089 should prevent future coverage merge errors from causing the test
6090 suite for the "process" subsystem to fail. The process subsystem
6091 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
6093 - Terminate test-stem if it takes more than 9.5 minutes to run.
6094 (Travis terminates the job after 10 minutes of no output.)
6095 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
6097 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
6098 - Avoid spurious errors when Appveyor CI fails before the install step.
6099 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
6101 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
6102 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6103 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6105 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
6106 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
6107 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
6110 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
6111 - Fix a logic error that prevented the SessionGroup sub-option from
6112 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
6114 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
6115 - Fix a BUG() assertion that occurs within a very small race window
6116 between when a client intro circuit opens and when its descriptor
6117 gets cleaned up from the cache. The circuit is now closed early,
6118 which will trigger a re-fetch of the descriptor and continue the
6119 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
6121 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
6122 - Don't believe clock skew results from NETINFO cells that appear to
6123 arrive before we sent the VERSIONS cells they are responding to.
6124 Previously, we would accept them up to 3 minutes "in the past".
6125 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6127 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
6128 - Fix a compilation warning on Windows about casting a function
6129 pointer for GetTickCount64(). Fixes bug 31374; bugfix
6132 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
6133 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
6134 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
6136 o Minor bugfixes (compilation, backport from 0.4.1.5):
6137 - Avoid using labs() on time_t, which can cause compilation warnings
6138 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6140 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6141 - Suppress spurious float-conversion warnings from GCC when calling
6142 floating-point classifier functions on FreeBSD. Fixes part of bug
6143 31687; bugfix on 0.3.1.5-alpha.
6145 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
6146 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
6147 due to missing declarations of abort(), and prevent other such
6148 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
6150 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
6151 - Fix a bug that prevented us from supporting SOCKS5 proxies that
6152 want authentication along with configured (but unused!)
6153 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
6155 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
6156 - Avoid trying to read data from closed connections, which can cause
6157 needless loops in Libevent and infinite loops in Shadow. Fixes bug
6158 30344; bugfix on 0.1.1.1-alpha.
6160 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
6161 - Allow the test-stem job to fail in Travis, because it sometimes
6162 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6163 - Skip test_rebind on macOS in Travis, because it is unreliable on
6164 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6165 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6166 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6168 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
6169 - Avoid a set of possible code paths that could try to use freed
6170 memory in routerlist_free() while Tor was exiting. Fixes bug
6171 31003; bugfix on 0.1.2.2-alpha.
6173 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
6174 - Stop crashing after parsing an unknown descriptor purpose
6175 annotation. We think this bug can only be triggered by modifying a
6176 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6178 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
6179 - Move the "bandwidth-file-headers" line in directory authority
6180 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
6183 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
6184 - On abort, try harder to flush the output buffers of log messages.
6185 On some platforms (macOS), log messages could be discarded when
6186 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6187 - Report the tor version whenever an assertion fails. Previously, we
6188 only reported the Tor version on some crashes, and some non-fatal
6189 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6191 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6192 - When extracting an IPv6 address from a PF-based proxy, verify that
6193 we are actually configured to receive an IPv6 address, and log an
6194 internal error if not. Fixes part of bug 31687; bugfix
6197 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6198 - When tor is missing descriptors for some primary entry guards,
6199 make the log message less alarming. It's normal for descriptors to
6200 expire, as long as tor fetches new ones soon after. Fixes bug
6201 31657; bugfix on 0.3.3.1-alpha.
6203 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
6204 - Avoid logging that we are relaxing a circuit timeout when that
6205 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
6207 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
6208 - Correct a misleading error message when IPv4Only or IPv6Only is
6209 used but the resolved address can not be interpreted as an address
6210 of the specified IP version. Fixes bug 13221; bugfix on
6211 0.2.3.9-alpha. Patch from Kris Katterjohn.
6212 - Log the correct port number for listening sockets when "auto" is
6213 used to let Tor pick the port number. Previously, port 0 was
6214 logged instead of the actual port number. Fixes bug 29144; bugfix
6215 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6216 - Stop logging a BUG() warning when Tor is waiting for exit
6217 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
6219 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
6220 - Do not log a warning when running with an OpenSSL version other
6221 than the one Tor was compiled with, if the two versions should be
6222 compatible. Previously, we would warn whenever the version was
6223 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
6225 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6226 - Change log level of message "Hash of session info was not as
6227 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6230 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
6231 - Rate-limit the logging message about the obsolete .exit
6232 notation. Previously, there was no limit on this warning, which
6233 could potentially be triggered many times by a hostile website.
6234 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
6236 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
6237 - Do not log a nonfatal assertion failure when receiving a VERSIONS
6238 cell on a connection using the obsolete v1 link protocol. Log a
6239 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
6241 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
6242 - Reset the periodic events' "enabled" flag when Tor is shut down
6243 cleanly. Previously, this flag was left on, which caused periodic
6244 events not to be re-enabled when Tor was relaunched in-process
6245 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
6248 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
6249 - Avoid a minor memory leak that could occur on relays when failing
6250 to create a "keys" directory. Fixes bug 30148; bugfix
6253 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
6254 - Fix a trivial memory leak when parsing an invalid value
6255 from a download schedule in the configuration. Fixes bug
6256 30894; bugfix on 0.3.4.1-alpha.
6258 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
6259 - Refactor the shared random state's memory management so that it
6260 actually takes ownership of the shared random value pointers.
6261 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
6263 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
6264 - Stop leaking parts of the shared random state in the shared-random
6265 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
6267 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
6268 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
6269 implementation) when failing to load an onion service client
6270 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
6272 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
6273 - When purging the DNS cache because of an out-of-memory condition,
6274 try purging just the older entries at first. Previously, we would
6275 always purge the whole thing. Fixes bug 29617; bugfix
6278 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
6279 - Avoid crashing in our tor_vasprintf() implementation on systems
6280 that define neither vasprintf() nor _vscprintf(). (This bug has
6281 been here long enough that we question whether people are running
6282 Tor on such systems, but we're applying the fix out of caution.)
6283 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
6286 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
6287 - Avoid crashing when starting with a corrupt keys directory where
6288 the old ntor key and the new ntor key are identical. Fixes bug
6289 30916; bugfix on 0.2.4.8-alpha.
6291 o Minor bugfixes (rust, backport from 0.4.0.5):
6292 - Abort on panic in all build profiles, instead of potentially
6293 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
6295 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6296 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6297 31463; bugfix on 0.3.5.4-alpha.
6299 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
6300 - Allow connections to single onion services to remain idle without
6301 being disconnected. Previously, relays acting as rendezvous points
6302 for single onion services were mistakenly closing idle rendezvous
6303 circuits after 60 seconds, thinking that they were unused
6304 directory-fetching circuits that had served their purpose. Fixes
6305 bug 29665; bugfix on 0.2.1.26.
6307 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
6308 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
6309 relay and bridge extra-info documents. Fixes bug 29017; bugfix
6312 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
6313 - Downgrade some LOG_ERR messages in the address/* tests to
6314 warnings. The LOG_ERR messages were occurring when we had no
6315 configured network. We were failing the unit tests, because we
6316 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
6317 29530; bugfix on 0.3.5.8.
6318 - Fix our gcov wrapper script to look for object files at the
6319 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
6321 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
6322 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
6323 recent test-network.sh to use new chutney features in CI. Fixes
6324 bug 29703; bugfix on 0.2.9.1-alpha.
6325 - Fix a test failure on Windows caused by an unexpected "BUG"
6326 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
6329 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
6330 - When testing port rebinding, don't busy-wait for tor to log.
6331 Instead, actually sleep for a short time before polling again.
6332 Also improve the formatting of control commands and log messages.
6333 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
6335 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
6336 - When classifying a client's selection of TLS ciphers, if the
6337 client ciphers are not yet available, do not cache the result.
6338 Previously, we had cached the unavailability of the cipher list
6339 and never looked again, which in turn led us to assume that the
6340 client only supported the ancient V1 link protocol. This, in turn,
6341 was causing Stem integration tests to stall in some cases. Fixes
6342 bug 30021; bugfix on 0.2.4.8-alpha.
6344 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
6345 - Log bugs about the TLS read buffer's length only once, rather than
6346 filling the logs with similar warnings. Fixes bug 31939; bugfix
6349 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6350 - Always retry v2 single onion service intro and rend circuits with
6351 a 3-hop path. Previously, v2 single onion services used a 3-hop
6352 path when rendezvous circuits were retried after a remote or
6353 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6354 23818; bugfix on 0.2.9.3-alpha.
6355 - Make v3 single onion services fall back to a 3-hop intro, when all
6356 intro points are unreachable via a 1-hop path. Previously, v3
6357 single onion services failed when all intro nodes were unreachable
6358 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6360 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
6361 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
6362 Windows Server 2012 R2 job. The remaining 2 jobs still provide
6363 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
6364 fast_finish, so failed jobs terminate the build immediately. Fixes
6365 bug 29601; bugfix on 0.3.5.4-alpha.
6367 o Documentation (backport from 0.4.2.1-alpha):
6368 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6369 notice.html so that operators no longer have to host it
6370 themselves. Closes ticket 31089.
6372 o Testing (backport from 0.4.1.2-alpha):
6373 - Specify torrc paths (with empty files) when launching tor in
6374 integration tests; refrain from reading user and system torrcs.
6375 Resolves issue 29702.
6377 o Testing (continuous integration, backport from 0.4.1.1-alpha):
6378 - In Travis, show stem's tor log after failure. Closes ticket 30234.
6380 o Testing (continuous integration, backport from 0.4.1.5):
6381 - In Travis, make stem log a controller trace to the console, and
6382 tail stem's tor log after failure. Closes ticket 30591.
6383 - In Travis, only run the stem tests that use a tor binary. Closes
6386 o Testing (continuous integration, backport from 0.4.2.3-alpha):
6387 - Disable all but one Travis CI macOS build, to mitigate slow
6388 scheduling of Travis macOS jobs. Closes ticket 32177.
6389 - Run the chutney IPv6 networks as part of Travis CI. Closes
6391 - Simplify the Travis CI build matrix, and optimise for build time.
6392 Closes ticket 31859.
6393 - Use Windows Server 2019 instead of Windows Server 2016 in our
6394 Appveyor builds. Closes ticket 32086.
6396 o Testing (continuous integration, backport from 0.4.2.4-rc):
6397 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
6398 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
6399 until we can fix some Bionic permissions issues (see ticket
6400 32240). Related to ticket 31919.
6401 - Install the mingw OpenSSL package in Appveyor. This makes sure
6402 that the OpenSSL headers and libraries match in Tor's Appveyor
6403 builds. (This bug was triggered by an Appveyor image update.)
6404 Fixes bug 32449; bugfix on 0.3.5.6-rc.
6405 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
6407 o Testing (continuous integration, backport from 0.4.2.5):
6408 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
6409 extensions. Also activates clang's -Wtypedef-redefinition warnings.
6410 Build some jobs with -std=gnu99, and some jobs without.
6411 Closes ticket 32500.
6413 Changes in version 0.4.2.4-rc - 2019-11-15
6414 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
6415 several bugs from earlier versions, including a few that would result in
6416 stack traces or incorrect behavior.
6418 o Minor features (build system):
6419 - Make pkg-config use --prefix when cross-compiling, if
6420 PKG_CONFIG_PATH is not set. Closes ticket 32191.
6422 o Minor features (geoip):
6423 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
6424 Country database. Closes ticket 32440.
6426 o Minor bugfixes (client, onion service v3):
6427 - Fix a BUG() assertion that occurs within a very small race window
6428 between when a client intro circuit opens and when its descriptor
6429 gets cleaned up from the cache. The circuit is now closed early,
6430 which will trigger a re-fetch of the descriptor and continue the
6431 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
6433 o Minor bugfixes (code quality):
6434 - Fix "make check-includes" so it runs correctly on out-of-tree
6435 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
6437 o Minor bugfixes (configuration):
6438 - Log the option name when skipping an obsolete option. Fixes bug
6439 32295; bugfix on 0.4.2.1-alpha.
6441 o Minor bugfixes (crash):
6442 - When running Tor with an option like --verify-config or
6443 --dump-config that does not start the event loop, avoid crashing
6444 if we try to exit early because of an error. Fixes bug 32407;
6445 bugfix on 0.3.3.1-alpha.
6447 o Minor bugfixes (directory):
6448 - When checking if a directory connection is anonymous, test if the
6449 circuit was marked for close before looking at its channel. This
6450 avoids a BUG() stacktrace if the circuit was previously closed.
6451 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
6453 o Minor bugfixes (shellcheck):
6454 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
6455 32402; bugfix on 0.4.2.1-alpha.
6456 - Start checking most scripts for shellcheck errors again. Fixes bug
6457 32402; bugfix on 0.4.2.1-alpha.
6459 o Testing (continuous integration):
6460 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
6461 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
6462 until we can fix some Bionic permissions issues (see ticket
6463 32240). Related to ticket 31919.
6464 - Install the mingw OpenSSL package in Appveyor. This makes sure
6465 that the OpenSSL headers and libraries match in Tor's Appveyor
6466 builds. (This bug was triggered by an Appveyor image update.)
6467 Fixes bug 32449; bugfix on 0.3.5.6-rc.
6468 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
6471 Changes in version 0.4.2.3-alpha - 2019-10-24
6472 This release fixes several bugs from the previous alpha release, and
6473 from earlier versions of Tor.
6475 o Major bugfixes (relay):
6476 - Relays now respect their AccountingMax bandwidth again. When
6477 relays entered "soft" hibernation (which typically starts when
6478 we've hit 90% of our AccountingMax), we had stopped checking
6479 whether we should enter hard hibernation. Soft hibernation refuses
6480 new connections and new circuits, but the existing circuits can
6481 continue, meaning that relays could have exceeded their configured
6482 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
6484 o Major bugfixes (v3 onion services):
6485 - Onion services now always use the exact number of intro points
6486 configured with the HiddenServiceNumIntroductionPoints option (or
6487 fewer if nodes are excluded). Before, a service could sometimes
6488 pick more intro points than configured. Fixes bug 31548; bugfix
6491 o Minor feature (onion services, control port):
6492 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
6493 (v3) onion services. Previously it defaulted to RSA1024 (v2).
6494 Closes ticket 29669.
6496 o Minor features (testing):
6497 - When running tests that attempt to look up hostnames, replace the
6498 libc name lookup functions with ones that do not actually touch
6499 the network. This way, the tests complete more quickly in the
6500 presence of a slow or missing DNS resolver. Closes ticket 31841.
6502 o Minor features (testing, continuous integration):
6503 - Disable all but one Travis CI macOS build, to mitigate slow
6504 scheduling of Travis macOS jobs. Closes ticket 32177.
6505 - Run the chutney IPv6 networks as part of Travis CI. Closes
6507 - Simplify the Travis CI build matrix, and optimise for build time.
6508 Closes ticket 31859.
6509 - Use Windows Server 2019 instead of Windows Server 2016 in our
6510 Appveyor builds. Closes ticket 32086.
6512 o Minor bugfixes (build system):
6513 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
6514 32124; bugfix on 0.3.4.1-alpha.
6515 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
6517 - Stop failing when jemalloc is requested, but tcmalloc is not
6518 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
6519 - When pkg-config is not installed, or a library that depends on
6520 pkg-config is not found, tell the user what to do to fix the
6521 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
6523 o Minor bugfixes (connections):
6524 - Avoid trying to read data from closed connections, which can cause
6525 needless loops in Libevent and infinite loops in Shadow. Fixes bug
6526 30344; bugfix on 0.1.1.1-alpha.
6528 o Minor bugfixes (error handling):
6529 - Always lock the backtrace buffer before it is used. Fixes bug
6530 31734; bugfix on 0.2.5.3-alpha.
6532 o Minor bugfixes (mainloop, periodic events, in-process API):
6533 - Reset the periodic events' "enabled" flag when Tor is shut down
6534 cleanly. Previously, this flag was left on, which caused periodic
6535 events not to be re-enabled when Tor was relaunched in-process
6536 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
6539 o Minor bugfixes (process management):
6540 - Remove overly strict assertions that triggered when a pluggable
6541 transport failed to launch. Fixes bug 31091; bugfix
6543 - Remove an assertion in the Unix process backend. This assertion
6544 would trigger when we failed to find the executable for a child
6545 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
6547 o Minor bugfixes (testing):
6548 - Avoid intermittent test failures due to a test that had relied on
6549 inconsistent timing sources. Fixes bug 31995; bugfix
6551 - When testing port rebinding, don't busy-wait for tor to log.
6552 Instead, actually sleep for a short time before polling again.
6553 Also improve the formatting of control commands and log messages.
6554 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
6556 o Minor bugfixes (tls, logging):
6557 - Log bugs about the TLS read buffer's length only once, rather than
6558 filling the logs with similar warnings. Fixes bug 31939; bugfix
6561 o Minor bugfixes (v3 onion services):
6562 - Fix an implicit conversion from ssize_t to size_t discovered by
6563 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
6564 - Fix a memory leak in an unlikely error code path when encoding HS
6565 DoS establish intro extension cell. Fixes bug 32063; bugfix
6567 - When cleaning up intro circuits for a v3 onion service, don't
6568 remove circuits that have an established or pending circuit, even
6569 if they ran out of retries. This way, we don't remove a circuit on
6570 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
6573 - Correct the description of "GuardLifetime". Fixes bug 31189;
6574 bugfix on 0.3.0.1-alpha.
6575 - Make clear in the man page, in both the bandwidth section and the
6576 AccountingMax section, that Tor counts in powers of two, not
6577 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
6578 bytes. Resolves ticket 32106.
6581 Changes in version 0.4.2.2-alpha - 2019-10-07
6582 This release fixes several bugs from the previous alpha release, and
6583 from earlier versions. It also includes a change in authorities, so
6584 that they begin to reject the currently unsupported release series.
6586 o Major features (directory authorities):
6587 - Directory authorities now reject relays running all currently
6588 deprecated release series. The currently supported release series
6589 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
6591 o Major bugfixes (embedded Tor):
6592 - Avoid a possible crash when restarting Tor in embedded mode and
6593 enabling a different set of publish/subscribe messages. Fixes bug
6594 31898; bugfix on 0.4.1.1-alpha.
6596 o Major bugfixes (torrc parsing):
6597 - Stop ignoring torrc options after an %include directive, when the
6598 included directory ends with a file that does not contain any
6599 config options (but does contain comments or whitespace). Fixes
6600 bug 31408; bugfix on 0.3.1.1-alpha.
6602 o Minor features (auto-formatting scripts):
6603 - When annotating C macros, never generate a line that our check-
6604 spaces script would reject. Closes ticket 31759.
6605 - When annotating C macros, try to remove cases of double-negation.
6606 Closes ticket 31779.
6608 o Minor features (continuous integration):
6609 - When building on Appveyor and Travis, pass the "-k" flag to make,
6610 so that we are informed of all compilation failures, not just the
6611 first one or two. Closes ticket 31372.
6613 o Minor features (geoip):
6614 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
6615 Country database. Closes ticket 31931.
6617 o Minor features (maintenance scripts):
6618 - Add a Coccinelle script to detect bugs caused by incrementing or
6619 decrementing a variable inside a call to log_debug(). Since
6620 log_debug() is a macro whose arguments are conditionally
6621 evaluated, it is usually an error to do this. One such bug was
6622 30628, in which SENDME cells were miscounted by a decrement
6623 operator inside a log_debug() call. Closes ticket 30743.
6625 o Minor features (onion services v3):
6626 - Assist users who try to setup v2 client authorization in v3 onion
6627 services by pointing them to the right documentation. Closes
6630 o Minor bugfixes (Appveyor continuous integration):
6631 - Avoid spurious errors when Appveyor CI fails before the install
6632 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
6634 o Minor bugfixes (best practices tracker):
6635 - When listing overbroad exceptions, do not also list problems, and
6636 do not list insufficiently broad exceptions. Fixes bug 31338;
6637 bugfix on 0.4.2.1-alpha.
6639 o Minor bugfixes (controller protocol):
6640 - Fix the MAPADDRESS controller command to accept one or more
6641 arguments. Previously, it required two or more arguments, and
6642 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6644 o Minor bugfixes (logging):
6645 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
6646 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
6647 - Disable backtrace signal handlers when shutting down tor. Fixes
6648 bug 31614; bugfix on 0.2.5.2-alpha.
6649 - Rate-limit the logging message about the obsolete .exit
6650 notation. Previously, there was no limit on this warning, which
6651 could potentially be triggered many times by a hostile website.
6652 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
6653 - When initialising log domain masks, only set known log domains.
6654 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
6656 o Minor bugfixes (logging, protocol violations):
6657 - Do not log a nonfatal assertion failure when receiving a VERSIONS
6658 cell on a connection using the obsolete v1 link protocol. Log a
6659 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
6661 o Minor bugfixes (modules):
6662 - Explain what the optional Directory Authority module is, and what
6663 happens when it is disabled. Fixes bug 31825; bugfix
6666 o Minor bugfixes (multithreading):
6667 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
6668 31736; bugfix on 0.0.7.
6670 o Minor bugfixes (relay):
6671 - Avoid crashing when starting with a corrupt keys directory where
6672 the old ntor key and the new ntor key are identical. Fixes bug
6673 30916; bugfix on 0.2.4.8-alpha.
6675 o Minor bugfixes (tests, SunOS):
6676 - Avoid a map_anon_nofork test failure due to a signed/unsigned
6677 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
6679 o Code simplification and refactoring:
6680 - Refactor connection_control_process_inbuf() to reduce the size of
6681 a practracker exception. Closes ticket 31840.
6682 - Refactor the microdescs_parse_from_string() function into smaller
6683 pieces, for better comprehensibility. Closes ticket 31675.
6684 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
6685 tests and fuzzers, rather than using hard-coded values. Closes
6687 - Interface for function `decrypt_desc_layer` cleaned up. Closes
6691 - Document the signal-safe logging behaviour in the tor man page.
6692 Also add some comments to the relevant functions. Closes
6694 - Explain why we can't destroy the backtrace buffer mutex. Explain
6695 why we don't need to destroy the log mutex. Closes ticket 31736.
6696 - The Tor source code repository now includes a (somewhat dated)
6697 description of Tor's modular architecture, in doc/HACKING/design.
6698 This is based on the old "tor-guts.git" repository, which we are
6699 adopting and superseding. Closes ticket 31849.
6702 Changes in version 0.4.1.6 - 2019-09-19
6703 This release backports several bugfixes to improve stability and
6704 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
6705 or experiencing reliability issues with single onion services, should
6708 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
6709 - Tolerate systems (including some Android installations) where
6710 madvise and MADV_DONTDUMP are available at build-time, but not at
6711 run time. Previously, these systems would notice a failed syscall
6712 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6713 - Tolerate systems (including some Linux installations) where
6714 madvise and/or MADV_DONTFORK are available at build-time, but not
6715 at run time. Previously, these systems would notice a failed
6716 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6718 o Minor features (stem tests, backport from 0.4.2.1-alpha):
6719 - Change "make test-stem" so it only runs the stem tests that use
6720 tor. This change makes test-stem faster and more reliable. Closes
6723 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
6724 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6725 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6727 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6728 - Add more stub functions to fix compilation on Android with link-
6729 time optimization when --disable-module-dirauth is used.
6730 Previously, these compilation settings would make the compiler
6731 look for functions that didn't exist. Fixes bug 31552; bugfix
6733 - Suppress spurious float-conversion warnings from GCC when calling
6734 floating-point classifier functions on FreeBSD. Fixes part of bug
6735 31687; bugfix on 0.3.1.5-alpha.
6737 o Minor bugfixes (controller protocol):
6738 - Fix the MAPADDRESS controller command to accept one or more
6739 arguments. Previously, it required two or more arguments, and ignored
6740 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6742 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6743 - When extracting an IPv6 address from a PF-based proxy, verify that
6744 we are actually configured to receive an IPv6 address, and log an
6745 internal error if not. Fixes part of bug 31687; bugfix
6748 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6749 - When tor is missing descriptors for some primary entry guards,
6750 make the log message less alarming. It's normal for descriptors to
6751 expire, as long as tor fetches new ones soon after. Fixes bug
6752 31657; bugfix on 0.3.3.1-alpha.
6754 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6755 - Change log level of message "Hash of session info was not as
6756 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6759 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6760 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6761 31463; bugfix on 0.3.5.4-alpha.
6763 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6764 - Always retry v2 single onion service intro and rend circuits with
6765 a 3-hop path. Previously, v2 single onion services used a 3-hop
6766 path when rendezvous circuits were retried after a remote or
6767 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6768 23818; bugfix on 0.2.9.3-alpha.
6770 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
6771 - Always retry v3 single onion service intro and rend circuits with
6772 a 3-hop path. Previously, v3 single onion services used a 3-hop
6773 path when rend circuits were retried after a remote or delayed
6774 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6775 bugfix on 0.3.2.1-alpha.
6776 - Make v3 single onion services fall back to a 3-hop intro, when all
6777 intro points are unreachable via a 1-hop path. Previously, v3
6778 single onion services failed when all intro nodes were unreachable
6779 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6781 o Documentation (backport from 0.4.2.1-alpha):
6782 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6783 notice.html so that operators no longer have to host it
6784 themselves. Closes ticket 31089.
6787 Changes in version 0.4.2.1-alpha - 2019-09-17
6788 This is the first alpha release in the 0.4.2.x series. It adds new
6789 defenses for denial-of-service attacks against onion services. It also
6790 includes numerous kinds of bugfixes and refactoring to help improve
6791 Tor's stability and ease of development.
6793 o Major features (onion service v3, denial of service):
6794 - Add onion service introduction denial of service defenses. Intro
6795 points can now rate-limit client introduction requests, using
6796 parameters that can be sent by the service within the
6797 ESTABLISH_INTRO cell. If the cell extension for this is not used,
6798 the intro point will honor the consensus parameters. Closes
6801 o Major bugfixes (circuit build, guard):
6802 - When considering upgrading circuits from "waiting for guard" to
6803 "open", always ignore circuits that are marked for close.
6804 Previously we could end up in the situation where a subsystem is
6805 notified of a circuit opening, but the circuit is still marked for
6806 close, leading to undesirable behavior. Fixes bug 30871; bugfix
6809 o Major bugfixes (crash, Linux, Android):
6810 - Tolerate systems (including some Android installations) where
6811 madvise and MADV_DONTDUMP are available at build-time, but not at
6812 run time. Previously, these systems would notice a failed syscall
6813 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6814 - Tolerate systems (including some Linux installations) where
6815 madvise and/or MADV_DONTFORK are available at build-time, but not
6816 at run time. Previously, these systems would notice a failed
6817 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6819 o Minor features (best practices tracker):
6820 - Our best-practices tracker now integrates with our include-checker
6821 tool to keep track of how many layering violations we have not yet
6822 fixed. We hope to reduce this number over time to improve Tor's
6823 modularity. Closes ticket 31176.
6824 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
6825 practracker from the environment. We may want this for continuous
6826 integration. Closes ticket 31309.
6827 - Give a warning rather than an error when a practracker exception
6828 is violated by a small amount, add a --list-overbroad option to
6829 practracker that lists exceptions that are stricter than they need
6830 to be, and provide an environment variable for disabling
6831 practracker. Closes ticket 30752.
6832 - Our best-practices tracker now looks at headers as well as C
6833 files. Closes ticket 31175.
6835 o Minor features (build system):
6836 - Add --disable-manpage and --disable-html-manual options to
6837 configure script. This will enable shortening build times by not
6838 building documentation. Resolves issue 19381.
6840 o Minor features (compilation):
6841 - Log a more useful error message when we are compiling and one of
6842 the compile-time hardening options we have selected can be linked
6843 but not executed. Closes ticket 27530.
6845 o Minor features (configuration):
6846 - The configuration code has been extended to allow splitting
6847 configuration data across multiple objects. Previously, all
6848 configuration data needed to be kept in a single object, which
6849 tended to become bloated. Closes ticket 31240.
6851 o Minor features (continuous integration):
6852 - When running CI builds on Travis, put some random data in
6853 ~/.torrc, to make sure no tests are reading the Tor configuration
6854 file from its default location. Resolves issue 30102.
6856 o Minor features (debugging):
6857 - Log a nonfatal assertion failure if we encounter a configuration
6858 line whose command is "CLEAR" but which has a nonempty value. This
6859 should be impossible, according to the rules of our configuration
6860 line parsing. Closes ticket 31529.
6862 o Minor features (git hooks):
6863 - Our pre-commit git hook now checks for a special file before
6864 running practracker, so that practracker only runs on branches
6865 that are based on master. Since the pre-push hook calls the pre-
6866 commit hook, practracker will also only run before pushes of
6867 branches based on master. Closes ticket 30979.
6869 o Minor features (git scripts):
6870 - Add a "--" command-line argument, to separate git-push-all.sh
6871 script arguments from arguments that are passed through to git
6872 push. Closes ticket 31314.
6873 - Add a -r <remote-name> argument to git-push-all.sh, so the script
6874 can push test branches to a personal remote. Closes ticket 31314.
6875 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
6876 git-push-all.sh, which makes these scripts create, merge forward,
6877 and push test branches. Closes ticket 31314.
6878 - Add a -u argument to git-merge-forward.sh, so that the script can
6879 re-use existing test branches after a merge failure and fix.
6880 Closes ticket 31314.
6881 - Add a TOR_GIT_PUSH env var, which sets the default git push
6882 command and arguments for git-push-all.sh. Closes ticket 31314.
6883 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
6884 script push master and maint branches with a delay between each
6885 branch. These delays trigger the CI jobs in a set order, which
6886 should show the most likely failures first. Also make pushes
6887 atomic by default, and make the script pass any command-line
6888 arguments to git push. Closes ticket 29879.
6889 - Call the shellcheck script from the pre-commit hook. Closes
6891 - Skip pushing test branches that are the same as a remote
6892 maint/release/master branch in git-push-all.sh by default. Add a
6893 -s argument, so git-push-all.sh can push all test branches. Closes
6896 o Minor features (IPv6, logging):
6897 - Log IPv6 addresses as well as IPv4 addresses when describing
6898 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
6900 o Minor features (onion service v3):
6901 - Do not allow single hop clients to fetch or post an HS descriptor
6902 from an HSDir. Closes ticket 24964.
6904 o Minor features (onion service):
6905 - Disallow single-hop clients at the introduction point. We've
6906 removed Tor2web support a while back and single-hop rendezvous
6907 attempts are blocked at the relays. This change should remove load
6908 off the network from spammy clients. Close ticket 24963.
6910 o Minor features (stem tests):
6911 - Change "make test-stem" so it only runs the stem tests that use
6912 tor. This change makes test-stem faster and more reliable. Closes
6915 o Minor features (testing):
6916 - Add a script to invoke "tor --dump-config" and "tor
6917 --verify-config" with various configuration options, and see
6918 whether tor's resulting configuration or error messages are what
6919 we expect. Use it for integration testing of our +Option and
6920 /Option flags. Closes ticket 31637.
6921 - Improve test coverage for our existing configuration parsing and
6922 management API. Closes ticket 30893.
6923 - Add integration tests to make sure that practracker gives the
6924 outputs we expect. Closes ticket 31477.
6925 - The practracker self-tests are now run as part of the Tor test
6926 suite. Closes ticket 31304.
6928 o Minor features (token bucket):
6929 - Implement a generic token bucket that uses a single counter, for
6930 use in anti-DoS onion service work. Closes ticket 30687.
6932 o Minor bugfixes (best practices tracker):
6933 - Fix a few issues in the best-practices script, including tests,
6934 tab tolerance, error reporting, and directory-exclusion logic.
6935 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
6936 - When running check-best-practices, only consider files in the src
6937 subdirectory. Previously we had recursively considered all
6938 subdirectories, which made us get confused by the temporary
6939 directories made by "make distcheck". Fixes bug 31578; bugfix
6942 o Minor bugfixes (build system):
6943 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6944 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6946 o Minor bugfixes (chutney, makefiles, documentation):
6947 - "make test-network-all" now shows the warnings from each test-
6948 network.sh run on the console, so developers see new warnings
6949 early. We've also improved the documentation for this feature, and
6950 renamed a Makefile variable so the code is self-documenting. Fixes
6951 bug 30455; bugfix on 0.3.0.4-rc.
6953 o Minor bugfixes (compilation):
6954 - Add more stub functions to fix compilation on Android with link-
6955 time optimization when --disable-module-dirauth is used.
6956 Previously, these compilation settings would make the compiler
6957 look for functions that didn't exist. Fixes bug 31552; bugfix
6959 - Suppress spurious float-conversion warnings from GCC when calling
6960 floating-point classifier functions on FreeBSD. Fixes part of bug
6961 31687; bugfix on 0.3.1.5-alpha.
6963 o Minor bugfixes (configuration):
6964 - Invalid floating-point values in the configuration file are now
6965 treated as errors in the configuration. Previously, they were
6966 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
6968 o Minor bugfixes (coverity):
6969 - Add an assertion when parsing a BEGIN cell so that coverity can be
6970 sure that we are not about to dereference a NULL address. Fixes
6971 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
6972 - In our siphash implementation, when building for coverity, use
6973 memcpy in place of a switch statement, so that coverity can tell
6974 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
6975 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
6976 - Fix several coverity warnings from our unit tests. Fixes bug
6977 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
6979 o Minor bugfixes (developer tooling):
6980 - Only log git script changes in the post-merge script when the
6981 merge was to the master branch. Fixes bug 31040; bugfix
6984 o Minor bugfixes (directory authorities):
6985 - Return a distinct status when formatting annotations fails. Fixes
6986 bug 30780; bugfix on 0.2.0.8-alpha.
6988 o Minor bugfixes (error handling):
6989 - On abort, try harder to flush the output buffers of log messages.
6990 On some platforms (macOS), log messages could be discarded when
6991 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6992 - Report the tor version whenever an assertion fails. Previously, we
6993 only reported the Tor version on some crashes, and some non-fatal
6994 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6995 - When tor aborts due to an error, close log file descriptors before
6996 aborting. Closing the logs makes some OSes flush log file buffers,
6997 rather than deleting buffered log lines. Fixes bug 31594; bugfix
7000 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
7001 - When extracting an IPv6 address from a PF-based proxy, verify that
7002 we are actually configured to receive an IPv6 address, and log an
7003 internal error if not. Fixes part of bug 31687; bugfix
7006 o Minor bugfixes (git hooks):
7007 - Remove a duplicate call to practracker from the pre-push hook. The
7008 pre-push hook already calls the pre-commit hook, which calls
7009 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
7011 o Minor bugfixes (git scripts):
7012 - Stop hard-coding the bash path in the git scripts. Some OSes don't
7013 have bash in /usr/bin, others have an ancient bash at this path.
7014 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
7015 - Stop hard-coding the tor master branch name and worktree path in
7016 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
7017 - Allow git-push-all.sh to be run from any directory. Previously,
7018 the script only worked if run from an upstream worktree directory.
7019 Closes ticket 31678.
7021 o Minor bugfixes (guards):
7022 - When tor is missing descriptors for some primary entry guards,
7023 make the log message less alarming. It's normal for descriptors to
7024 expire, as long as tor fetches new ones soon after. Fixes bug
7025 31657; bugfix on 0.3.3.1-alpha.
7027 o Minor bugfixes (ipv6):
7028 - Check for private IPv6 addresses alongside their IPv4 equivalents
7029 when authorities check descriptors. Previously, we only checked
7030 for private IPv4 addresses. Fixes bug 31088; bugfix on
7031 0.2.3.21-rc. Patch by Neel Chauhan.
7032 - When parsing microdescriptors, we should check the IPv6 exit
7033 policy alongside IPv4. Previously, we checked both exit policies
7034 for only router info structures, while microdescriptors were
7035 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
7038 o Minor bugfixes (logging):
7039 - Change log level of message "Hash of session info was not as
7040 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
7042 - Fix a code issue that would have broken our parsing of log domains
7043 as soon as we had 33 of them. Fortunately, we still only have 29.
7044 Fixes bug 31451; bugfix on 0.4.1.4-rc.
7046 o Minor bugfixes (memory management):
7047 - Stop leaking a small amount of memory in nt_service_install(), in
7048 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
7051 o Minor bugfixes (networking, IP addresses):
7052 - When parsing addresses via Tor's internal DNS lookup API, reject
7053 IPv4 addresses in square brackets, and accept IPv6 addresses in
7054 square brackets. This change completes the work started in 23082,
7055 making address parsing consistent between tor's internal DNS
7056 lookup and address parsing APIs. Fixes bug 30721; bugfix
7058 - When parsing addresses via Tor's internal address:port parsing and
7059 DNS lookup APIs, require IPv6 addresses with ports to have square
7060 brackets. But allow IPv6 addresses without ports, whether or not
7061 they have square brackets. Fixes bug 30721; bugfix
7064 o Minor bugfixes (onion service v3):
7065 - When purging the client descriptor cache, close any introduction
7066 point circuits associated with purged cache entries. This avoids
7067 picking those circuits later when connecting to the same
7068 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
7070 o Minor bugfixes (onion services):
7071 - In the hs_ident_circuit_t data structure, remove the unused field
7072 circuit_type and the respective argument in hs_ident_circuit_new().
7073 This field was set by clients (for introduction) and services (for
7074 introduction and rendezvous) but was never used afterwards. Fixes
7075 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
7077 o Minor bugfixes (operator tools):
7078 - Make tor-print-ed-signing-cert(1) print certificate expiration
7079 date in RFC 1123 and UNIX timestamp formats, to make output
7080 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
7082 o Minor bugfixes (rust):
7083 - Correctly exclude a redundant rust build job in Travis. Fixes bug
7084 31463; bugfix on 0.3.5.4-alpha.
7085 - Raise the minimum rustc version to 1.31.0, as checked by configure
7086 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
7088 o Minor bugfixes (sendme, code structure):
7089 - Rename the trunnel SENDME file definition from sendme.trunnel to
7090 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
7091 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
7093 o Minor bugfixes (statistics):
7094 - Stop removing the ed25519 signature if the extra info file is too
7095 big. If the signature data was removed, but the keyword was kept,
7096 this could result in an unparseable extra info file. Fixes bug
7097 30958; bugfix on 0.2.7.2-alpha.
7099 o Minor bugfixes (subsystems):
7100 - Make the subsystem init order match the subsystem module
7101 dependencies. Call windows process security APIs as early as
7102 possible. Initialize logging before network and time, so that
7103 network and time can use logging. Fixes bug 31615; bugfix
7106 o Minor bugfixes (testing):
7107 - Teach the util/socketpair_ersatz test to work correctly when we
7108 have no network stack configured. Fixes bug 30804; bugfix
7111 o Minor bugfixes (v2 single onion services):
7112 - Always retry v2 single onion service intro and rend circuits with
7113 a 3-hop path. Previously, v2 single onion services used a 3-hop
7114 path when rendezvous circuits were retried after a remote or
7115 delayed failure, but a 1-hop path for immediate retries. Fixes bug
7116 23818; bugfix on 0.2.9.3-alpha.
7118 o Minor bugfixes (v3 single onion services):
7119 - Always retry v3 single onion service intro and rend circuits with
7120 a 3-hop path. Previously, v3 single onion services used a 3-hop
7121 path when rend circuits were retried after a remote or delayed
7122 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
7123 bugfix on 0.3.2.1-alpha.
7124 - Make v3 single onion services fall back to a 3-hop intro, when all
7125 intro points are unreachable via a 1-hop path. Previously, v3
7126 single onion services failed when all intro nodes were unreachable
7127 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
7130 - Improve documentation in circuit padding subsystem. Patch by
7131 Tobias Pulls. Closes ticket 31113.
7132 - Include an example usage for IPv6 ORPort in our sample torrc.
7133 Closes ticket 31320; patch from Ali Raheem.
7134 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
7135 notice.html so that operators no longer have to host it
7136 themselves. Closes ticket 31089.
7139 - No longer include recommended package digests in votes as detailed
7140 in proposal 301. The RecommendedPackages torrc option is
7141 deprecated and will no longer have any effect. "package" lines
7142 will still be considered when computing consensuses for consensus
7143 methods that include them. (This change has no effect on the list
7144 of recommended Tor versions, which is still in use.) Closes
7146 - Remove torctl.in from contrib/dist directory. Resolves
7150 - Run shellcheck for all non-third-party shell scripts that are
7151 shipped with Tor. Closes ticket 29533.
7152 - When checking shell scripts, ignore any user-created directories.
7153 Closes ticket 30967.
7155 o Code simplification and refactoring (config handling):
7156 - Extract our variable manipulation code from confparse.c to a new
7157 lower-level typedvar.h module. Closes ticket 30864.
7158 - Lower another layer of object management from confparse.c to a
7159 more general tool. Now typed structure members are accessible via
7160 an abstract type. Implements ticket 30914.
7161 - Move our backend logic for working with configuration and state
7162 files into a lower-level library, since it no longer depends on
7163 any tor-specific functionality. Closes ticket 31626.
7164 - Numerous simplifications in configuration-handling logic: remove
7165 duplicated macro definitions, replace magical names with flags,
7166 and refactor "TestingTorNetwork" to use the same default-option
7167 logic as the rest of Tor. Closes ticket 30935.
7168 - Replace our ad-hoc set of flags for configuration variables and
7169 configuration variable types with fine-grained orthogonal flags
7170 corresponding to the actual behavior we want. Closes ticket 31625.
7172 o Code simplification and refactoring (misc):
7173 - Eliminate some uses of lower-level control reply abstractions,
7174 primarily in the onion_helper functions. Closes ticket 30889.
7175 - Rework bootstrap tracking to use the new publish-subscribe
7176 subsystem. Closes ticket 29976.
7177 - Rewrite format_node_description() and router_get_verbose_nickname()
7178 to use strlcpy() and strlcat(). The previous implementation used
7179 memcpy() and pointer arithmetic, which was error-prone. Closes
7180 ticket 31545. This is CID 1452819.
7181 - Split extrainfo_dump_to_string() into smaller functions. Closes
7183 - Use the ptrdiff_t type consistently for expressing variable
7184 offsets and pointer differences. Previously we incorrectly (but
7185 harmlessly) used int and sometimes off_t for these cases. Closes
7187 - Use the subsystems mechanism to manage the main event loop code.
7188 Closes ticket 30806.
7189 - Various simplifications and minor improvements to the circuit
7190 padding machines. Patch by Tobias Pulls. Closes tickets 31112
7193 o Documentation (hard-coded directories):
7194 - Improve the documentation for the DirAuthority and FallbackDir
7195 torrc options. Closes ticket 30955.
7197 o Documentation (tor.1 man page):
7198 - Fix typo in tor.1 man page: the option is "--help", not "-help".
7199 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
7202 Changes in version 0.4.1.5 - 2019-08-20
7203 This is the first stable release in the 0.4.1.x series. This series
7204 adds experimental circuit-level padding, authenticated SENDME cells to
7205 defend against certain attacks, and several performance improvements
7206 to save on CPU consumption. It fixes bugs in bootstrapping and v3
7207 onion services. It also includes numerous smaller features and
7208 bugfixes on earlier versions.
7210 Per our support policy, we will support the 0.4.1.x series for nine
7211 months, or until three months after the release of a stable 0.4.2.x:
7212 whichever is longer. If you need longer-term support, please stick
7213 with 0.3.5.x, which will we plan to support until Feb 2022.
7215 Below are the changes since 0.4.1.4-rc. For a complete list of changes
7216 since 0.4.0.5, see the ReleaseNotes file.
7218 o Directory authority changes:
7219 - The directory authority "dizum" has a new IP address. Closes
7222 o Minor features (circuit padding logging):
7223 - Demote noisy client-side warn logs about circuit padding to
7224 protocol warnings. Add additional log messages and circuit ID
7225 fields to help with bug 30992 and any other future issues.
7227 o Minor bugfixes (circuit padding negotiation):
7228 - Bump the circuit padding protocol version to explicitly signify
7229 that the HS setup machine support is finalized in 0.4.1.x-stable.
7230 This also means that 0.4.1.x-alpha clients will not negotiate
7231 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
7232 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
7233 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
7235 o Minor bugfixes (circuit padding):
7236 - Ignore non-padding cells on padding circuits. This addresses
7237 various warning messages from subsystems that were not expecting
7238 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
7240 o Minor bugfixes (clock skew detection):
7241 - Don't believe clock skew results from NETINFO cells that appear to
7242 arrive before we sent the VERSIONS cells they are responding to.
7243 Previously, we would accept them up to 3 minutes "in the past".
7244 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
7246 o Minor bugfixes (compatibility, standards compliance):
7247 - Fix a bug that would invoke undefined behavior on certain
7248 operating systems when trying to asprintf() a string exactly
7249 INT_MAX bytes long. We don't believe this is exploitable, but it's
7250 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
7251 Found and fixed by Tobias Stoeckmann.
7253 o Minor bugfixes (compilation warning):
7254 - Fix a compilation warning on Windows about casting a function
7255 pointer for GetTickCount64(). Fixes bug 31374; bugfix
7258 o Minor bugfixes (compilation):
7259 - Avoid using labs() on time_t, which can cause compilation warnings
7260 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
7262 o Minor bugfixes (distribution):
7263 - Do not ship any temporary files found in the
7264 scripts/maint/practracker directory. Fixes bug 31311; bugfix
7267 o Testing (continuous integration):
7268 - In Travis, make stem log a controller trace to the console, and
7269 tail stem's tor log after failure. Closes ticket 30591.
7270 - In Travis, only run the stem tests that use a tor binary. Closes
7274 Changes in version 0.4.1.4-rc - 2019-07-25
7275 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
7276 updates to a new list of fallback directories. If no new bugs are
7277 found, the next release in the 0.4.1.x serious should be stable.
7279 o Major bugfixes (circuit build, guard):
7280 - When considering upgrading circuits from "waiting for guard" to
7281 "open", always ignore circuits that are marked for close. Otherwise,
7282 we can end up in the situation where a subsystem is notified that
7283 a closing circuit has just opened, leading to undesirable
7284 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
7286 o Minor features (continuous integration):
7287 - Our Travis configuration now uses Chutney to run some network
7288 integration tests automatically. Closes ticket 29280.
7290 o Minor features (fallback directory list):
7291 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
7292 in December 2018 (of which ~122 were still functional), with a
7293 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
7294 in June 2019. Closes ticket 28795.
7296 o Minor bugfixes (circuit padding):
7297 - On relays, properly check that a padding machine is absent before
7298 logging a warning about it being absent. Fixes bug 30649; bugfix
7300 - Add two NULL checks in unreachable places to silence Coverity (CID
7301 144729 and 1447291) and better future-proof ourselves. Fixes bug
7302 31024; bugfix on 0.4.1.1-alpha.
7304 o Minor bugfixes (crash on exit):
7305 - Avoid a set of possible code paths that could try to use freed
7306 memory in routerlist_free() while Tor was exiting. Fixes bug
7307 31003; bugfix on 0.1.2.2-alpha.
7309 o Minor bugfixes (logging):
7310 - Fix a conflict between the flag used for messaging-domain log
7311 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
7314 o Minor bugfixes (memory leaks):
7315 - Fix a trivial memory leak when parsing an invalid value from a
7316 download schedule in the configuration. Fixes bug 30894; bugfix
7319 o Code simplification and refactoring:
7320 - Remove some dead code from circpad_machine_remove_token() to fix
7321 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
7325 Changes in version 0.4.1.3-alpha - 2019-06-25
7326 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
7327 alpha, most of them from earlier release series.
7329 o Major bugfixes (Onion service reachability):
7330 - Properly clean up the introduction point map when circuits change
7331 purpose from onion service circuits to pathbias, measurement, or
7332 other circuit types. This should fix some service-side instances
7333 of introduction point failure. Fixes bug 29034; bugfix
7336 o Minor features (geoip):
7337 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
7338 Country database. Closes ticket 30852.
7340 o Minor features (logging):
7341 - Give a more useful assertion failure message if we think we have
7342 minherit() but we fail to make a region non-inheritable. Give a
7343 compile-time warning if our support for minherit() is incomplete.
7344 Closes ticket 30686.
7346 o Minor bugfixes (circuit isolation):
7347 - Fix a logic error that prevented the SessionGroup sub-option from
7348 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
7350 o Minor bugfixes (continuous integration):
7351 - Allow the test-stem job to fail in Travis, because it sometimes
7352 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
7353 - Skip test_rebind on macOS in Travis, because it is unreliable on
7354 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
7355 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
7356 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
7358 o Minor bugfixes (directory authorities):
7359 - Stop crashing after parsing an unknown descriptor purpose
7360 annotation. We think this bug can only be triggered by modifying a
7361 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
7363 o Minor bugfixes (pluggable transports):
7364 - When running as a bridge with pluggable transports, always publish
7365 pluggable transport information in our extrainfo descriptor, even
7366 if ExtraInfoStatistics is 0. This information is needed by
7367 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
7370 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
7371 Closes ticket 30630.
7374 Changes in version 0.4.1.2-alpha - 2019-06-06
7375 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
7376 previous alpha, and some much older. It also contains minor testing
7377 improvements, and an improvement to the security of our authenticated
7378 SENDME implementation.
7380 o Major bugfixes (bridges):
7381 - Consider our directory information to have changed when our list
7382 of bridges changes. Previously, Tor would not re-compute the
7383 status of its directory information when bridges changed, and
7384 therefore would not realize that it was no longer able to build
7385 circuits. Fixes part of bug 29875.
7386 - Do not count previously configured working bridges towards our
7387 total of working bridges. Previously, when Tor's list of bridges
7388 changed, it would think that the old bridges were still usable,
7389 and delay fetching router descriptors for the new ones. Fixes part
7390 of bug 29875; bugfix on 0.3.0.1-alpha.
7392 o Major bugfixes (flow control, SENDME):
7393 - Decrement the stream-level package window after packaging a cell.
7394 Previously, it was done inside a log_debug() call, meaning that if
7395 debug logs were not enabled, the decrement would never happen, and
7396 thus the window would be out of sync with the other end point.
7397 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
7399 o Major bugfixes (onion service reachability):
7400 - Properly clean up the introduction point map and associated state
7401 when circuits change purpose from onion service circuits to
7402 pathbias, measurement, or other circuit types. This may fix some
7403 instances of introduction point failure. Fixes bug 29034; bugfix
7406 o Minor features (authenticated SENDME):
7407 - Ensure that there is enough randomness on every circuit to prevent
7408 an attacker from successfully predicting the hashes they will need
7409 to include in authenticated SENDME cells. At a random interval, if
7410 we have not sent randomness already, we now leave some extra space
7411 at the end of a cell that we can fill with random bytes. Closes
7414 o Minor features (continuous integration):
7415 - When running coverage builds on Travis, we now set
7416 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
7419 o Minor features (maintenance):
7420 - Add a new "make autostyle" target that developers can use to apply
7421 all automatic Tor style and consistency conversions to the
7422 codebase. Closes ticket 30539.
7424 o Minor features (testing):
7425 - The circuitpadding tests now use a reproducible RNG implementation,
7426 so that if a test fails, we can learn why. Part of ticket 28878.
7427 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
7428 to set the RNG seed for tests that use a reproducible RNG. Part of
7430 - When running tests in coverage mode, take additional care to make
7431 our coverage deterministic, so that we can accurately track
7432 changes in code coverage. Closes ticket 30519.
7434 o Minor bugfixes (configuration, proxies):
7435 - Fix a bug that prevented us from supporting SOCKS5 proxies that
7436 want authentication along with configured (but unused!)
7437 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
7439 o Minor bugfixes (controller):
7440 - POSTDESCRIPTOR requests should work again. Previously, they were
7441 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
7443 - Repair the HSFETCH command so that it works again. Previously, it
7444 expected a body when it shouldn't have. Fixes bug 30646; bugfix
7447 o Minor bugfixes (developer tooling):
7448 - Fix pre-push hook to allow fixup and squash commits when pushing
7449 to non-upstream git remote. Fixes bug 30286; bugfix
7452 o Minor bugfixes (directory authority):
7453 - Move the "bandwidth-file-headers" line in directory authority
7454 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
7457 o Minor bugfixes (NetBSD):
7458 - Fix usage of minherit() on NetBSD and other platforms that define
7459 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
7460 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
7462 o Minor bugfixes (out-of-memory handler):
7463 - When purging the DNS cache because of an out-of-memory condition,
7464 try purging just the older entries at first. Previously, we would
7465 always purge the whole thing. Fixes bug 29617; bugfix
7468 o Minor bugfixes (portability):
7469 - Avoid crashing in our tor_vasprintf() implementation on systems
7470 that define neither vasprintf() nor _vscprintf(). (This bug has
7471 been here long enough that we question whether people are running
7472 Tor on such systems, but we're applying the fix out of caution.)
7473 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
7476 o Minor bugfixes (shutdown, libevent, memory safety):
7477 - Avoid use-after-free bugs when shutting down, by making sure that
7478 we shut down libevent only after shutting down all of its users.
7479 We believe these are harmless in practice, since they only occur
7480 on the shutdown path, and do not involve any attacker-controlled
7481 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
7483 o Minor bugfixes (static analysis):
7484 - Fix several spurious Coverity warnings about the unit tests, to
7485 lower our chances of missing real warnings in the future. Fixes
7486 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
7489 - Specify torrc paths (with empty files) when launching tor in
7490 integration tests; refrain from reading user and system torrcs.
7491 Resolves issue 29702.
7494 Changes in version 0.4.1.1-alpha - 2019-05-22
7495 This is the first alpha in the 0.4.1.x series. It introduces
7496 lightweight circuit padding to make some onion-service circuits harder
7497 to distinguish, includes a new "authenticated SENDME" feature to make
7498 certain denial-of-service attacks more difficult, and improves
7499 performance in several areas.
7501 o Major features (circuit padding):
7502 - Onion service clients now add padding cells at the start of their
7503 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
7504 look more like general purpose Exit traffic. The overhead for this
7505 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
7506 extra upstream cell and 10 downstream cells for INTRODUCE
7507 circuits. This feature is only enabled when also supported by the
7508 circuit's middle node. (Clients may specify fixed middle nodes
7509 with the MiddleNodes option, and may force-disable this feature
7510 with the CircuitPadding option.) Closes ticket 28634.
7512 o Major features (code organization):
7513 - Tor now includes a generic publish-subscribe message-passing
7514 subsystem that we can use to organize intermodule dependencies. We
7515 hope to use this to reduce dependencies between modules that don't
7516 need to be related, and to generally simplify our codebase. Closes
7519 o Major features (controller protocol):
7520 - Controller commands are now parsed using a generalized parsing
7521 subsystem. Previously, each controller command was responsible for
7522 parsing its own input, which led to strange inconsistencies.
7523 Closes ticket 30091.
7525 o Major features (flow control):
7526 - Implement authenticated SENDMEs as detailed in proposal 289. A
7527 SENDME cell now includes the digest of the traffic that it
7528 acknowledges, so that once an end point receives the SENDME, it
7529 can confirm the other side's knowledge of the previous cells that
7530 were sent, and prevent certain types of denial-of-service attacks.
7531 This behavior is controlled by two new consensus parameters: see
7532 the proposal for more details. Fixes ticket 26288.
7534 o Major features (performance):
7535 - Our node selection algorithm now excludes nodes in linear time.
7536 Previously, the algorithm was quadratic, which could slow down
7537 heavily used onion services. Closes ticket 30307.
7539 o Major features (performance, RNG):
7540 - Tor now constructs a fast secure pseudorandom number generator for
7541 each thread, to use when performance is critical. This PRNG is
7542 based on AES-CTR, using a buffering construction similar to
7543 libottery and the (newer) OpenBSD arc4random() code. It
7544 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
7545 small outputs. Although we believe it to be cryptographically
7546 strong, we are only using it when necessary for performance.
7547 Implements tickets 29023 and 29536.
7549 o Major bugfixes (onion service v3):
7550 - Fix an unreachable bug in which an introduction point could try to
7551 send an INTRODUCE_ACK with a status code that Trunnel would refuse
7552 to encode, leading the relay to assert(). We've consolidated the
7553 ABI values into Trunnel now. Fixes bug 30454; bugfix
7555 - Clients can now handle unknown status codes from INTRODUCE_ACK
7556 cells. (The NACK behavior will stay the same.) This will allow us
7557 to extend status codes in the future without breaking the normal
7558 client behavior. Fixes another part of bug 30454; bugfix
7561 o Minor features (circuit padding):
7562 - We now use a fast PRNG when scheduling circuit padding. Part of
7564 - Allow the padding machine designer to pick the edges of their
7565 histogram instead of trying to compute them automatically using an
7566 exponential formula. Resolves some undefined behavior in the case
7567 of small histograms and allows greater flexibility on machine
7568 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
7569 - Allow circuit padding machines to hold a circuit open until they
7570 are done padding it. Closes ticket 28780.
7572 o Minor features (compile-time modules):
7573 - Add a "--list-modules" command to print a list of which compile-
7574 time modules are enabled. Closes ticket 30452.
7576 o Minor features (continuous integration):
7577 - Remove sudo configuration lines from .travis.yml as they are no
7578 longer needed with current Travis build environment. Resolves
7580 - In Travis, show stem's tor log after failure. Closes ticket 30234.
7582 o Minor features (controller):
7583 - Add onion service version 3 support to the HSFETCH command.
7584 Previously, only version 2 onion services were supported. Closes
7585 ticket 25417. Patch by Neel Chauhan.
7587 o Minor features (debugging):
7588 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
7589 logging of additional information during assert failure. Now we
7590 can use format strings to include information for trouble
7591 shooting. Resolves ticket 29662.
7593 o Minor features (defense in depth):
7594 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
7595 case a bug causes them to be used later. Closes ticket 30176.
7596 Patch from Tobias Stoeckmann.
7597 - Tor now uses a cryptographically strong PRNG even for decisions
7598 that we do not believe are security-sensitive. Previously, for
7599 performance reasons, we had used a trivially predictable linear
7600 congruential generator algorithm for certain load-balancing and
7601 statistical sampling decisions. Now we use our fast RNG in those
7602 cases. Closes ticket 29542.
7604 o Minor features (developer tools):
7605 - Tor's "practracker" test script now checks for files and functions
7606 that seem too long and complicated. Existing overlong functions
7607 and files are accepted for now, but should eventually be
7608 refactored. Closes ticket 29221.
7609 - Add some scripts used for git maintenance to scripts/git. Closes
7611 - Call practracker from pre-push and pre-commit git hooks to let
7612 developers know if they made any code style violations. Closes
7614 - Add a script to check that each header has a well-formed and
7615 unique guard macro. Closes ticket 29756.
7617 o Minor features (geoip):
7618 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
7619 Country database. Closes ticket 30522.
7621 o Minor features (HTTP tunnel):
7622 - Return an informative web page when the HTTPTunnelPort is used as
7623 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
7625 o Minor features (IPv6, v3 onion services):
7626 - Make v3 onion services put IPv6 addresses in service descriptors.
7627 Before this change, service descriptors only contained IPv4
7628 addresses. Implements 26992.
7630 o Minor features (modularity):
7631 - The "--disable-module-dirauth" compile-time option now disables
7632 even more dirauth-only code. Closes ticket 30345.
7634 o Minor features (performance):
7635 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
7636 1.1.1 and later), since they tend to be faster than tiny-keccak.
7637 Closes ticket 28837.
7639 o Minor features (testing):
7640 - Tor's unit test code now contains helper functions to replace the
7641 PRNG with a deterministic or reproducible version for testing.
7642 Previously, various tests implemented this in various ways.
7643 Implements ticket 29732.
7644 - We now have a script, cov-test-determinism.sh, to identify places
7645 where our unit test coverage has become nondeterministic. Closes
7647 - Check that representative subsets of values of `int` and `unsigned
7648 int` can be represented by `void *`. Resolves issue 29537.
7650 o Minor bugfixes (bridge authority):
7651 - Bridge authorities now set bridges as running or non-running when
7652 about to dump their status to a file. Previously, they set bridges
7653 as running in response to a GETINFO command, but those shouldn't
7654 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
7655 Patch by Neel Chauhan.
7657 o Minor bugfixes (channel padding statistics):
7658 - Channel padding write totals and padding-enabled totals are now
7659 counted properly in relay extrainfo descriptors. Fixes bug 29231;
7660 bugfix on 0.3.1.1-alpha.
7662 o Minor bugfixes (circuit padding):
7663 - Add a "CircuitPadding" torrc option to disable circuit padding.
7664 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
7665 - Allow circuit padding machines to specify that they do not
7666 contribute much overhead, and provide consensus flags and torrc
7667 options to force clients to only use these low overhead machines.
7668 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
7669 - Provide a consensus parameter to fully disable circuit padding, to
7670 be used in emergency network overload situations. Fixes bug 30173;
7671 bugfix on 0.4.0.1-alpha.
7672 - The circuit padding subsystem will no longer schedule padding if
7673 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
7674 - Inspect a circuit-level cell queue before sending padding, to
7675 avoid sending padding while too much data is already queued. Fixes
7676 bug 29204; bugfix on 0.4.0.1-alpha.
7677 - Avoid calling monotime_absolute_usec() in circuit padding machines
7678 that do not use token removal or circuit RTT estimation. Fixes bug
7679 29085; bugfix on 0.4.0.1-alpha.
7681 o Minor bugfixes (compilation, unusual configurations):
7682 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
7683 due to missing declarations of abort(), and prevent other such
7684 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
7686 o Minor bugfixes (controller protocol):
7687 - Teach the controller parser to distinguish an object preceded by
7688 an argument list from one without. Previously, it couldn't
7689 distinguish an argument list from the first line of a multiline
7690 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
7692 o Minor bugfixes (directory authority, ipv6):
7693 - Directory authorities with IPv6 support now always mark themselves
7694 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
7695 Patch by Neel Chauhan.
7697 o Minor bugfixes (documentation):
7698 - Improve the documentation for using MapAddress with ".exit". Fixes
7699 bug 30109; bugfix on 0.1.0.1-rc.
7700 - Improve the monotonic time module and function documentation to
7701 explain what "monotonic" actually means, and document some results
7702 that have surprised people. Fixes bug 29640; bugfix
7704 - Use proper formatting when providing an example on quoting options
7705 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
7707 o Minor bugfixes (logging):
7708 - Do not log a warning when running with an OpenSSL version other
7709 than the one Tor was compiled with, if the two versions should be
7710 compatible. Previously, we would warn whenever the version was
7711 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
7712 - Warn operators when the MyFamily option is set but ContactInfo is
7713 missing, as the latter should be set too. Fixes bug 25110; bugfix
7716 o Minor bugfixes (memory leak):
7717 - Avoid a minor memory leak that could occur on relays when failing
7718 to create a "keys" directory. Fixes bug 30148; bugfix
7721 o Minor bugfixes (onion services):
7722 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
7723 implementation) when failing to load an onion service client
7724 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
7725 - When refusing to launch a controller's HSFETCH request because of
7726 rate-limiting, respond to the controller with a new response,
7727 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
7728 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
7730 - When relaunching a circuit to a rendezvous service, mark the
7731 circuit as needing high-uptime routers as appropriate. Fixes bug
7732 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
7733 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
7734 (IPv6 support for v3 onion services is still incomplete: see
7735 ticket 23493 for details.) Fixes bug 23588; bugfix on
7736 0.3.2.1-alpha. Patch by Neel Chauhan.
7738 o Minor bugfixes (onion services, performance):
7739 - When building circuits to onion services, call tor_addr_parse()
7740 less often. Previously, we called tor_addr_parse() in
7741 circuit_is_acceptable() even if its output wasn't used. This
7742 change should improve performance when building circuits. Fixes
7743 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
7745 o Minor bugfixes (performance):
7746 - When checking whether a node is a bridge, use a fast check to make
7747 sure that its identity is set. Previously, we used a constant-time
7748 check, which is not necessary in this case. Fixes bug 30308;
7749 bugfix on 0.3.5.1-alpha.
7751 o Minor bugfixes (pluggable transports):
7752 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
7753 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
7755 o Minor bugfixes (probability distributions):
7756 - Refactor and improve parts of the probability distribution code
7757 that made Coverity complain. Fixes bug 29805; bugfix
7760 o Minor bugfixes (python):
7761 - Stop assuming that /usr/bin/python3 exists. For scripts that work
7762 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
7763 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
7765 o Minor bugfixes (relay):
7766 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
7767 is auto, act as if ExitRelay is 1. Previously, we would ignore
7768 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
7769 0.3.5.1-alpha. Patch by Neel Chauhan.
7771 o Minor bugfixes (stats):
7772 - When ExtraInfoStatistics is 0, stop including bandwidth usage
7773 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
7774 bridge statistics by country in extra-info documents. Fixes bug
7775 29018; bugfix on 0.2.4.1-alpha.
7777 o Minor bugfixes (testing):
7778 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
7779 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
7780 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
7781 - Fix some incorrect code in the v3 onion service unit tests. Fixes
7782 bug 29243; bugfix on 0.3.2.1-alpha.
7783 - In the "routerkeys/*" tests, check the return values of mkdir()
7784 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
7785 Found by Coverity as CID 1444254.
7786 - Split test_utils_general() into several smaller test functions.
7787 This makes it easier to perform resource deallocation on assert
7788 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
7789 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
7791 o Minor bugfixes (tor-resolve):
7792 - Fix a memory leak in tor-resolve that could happen if Tor gave it
7793 a malformed SOCKS response. (Memory leaks in tor-resolve don't
7794 actually matter, but it's good to fix them anyway.) Fixes bug
7795 30151; bugfix on 0.4.0.1-alpha.
7797 o Code simplification and refactoring:
7798 - Abstract out the low-level formatting of replies on the control
7799 port. Implements ticket 30007.
7800 - Add several assertions in an attempt to fix some Coverity
7801 warnings. Closes ticket 30149.
7802 - Introduce a connection_dir_buf_add() helper function that checks
7803 for compress_state of dir_connection_t and automatically writes a
7804 string to directory connection with or without compression.
7805 Resolves issue 28816.
7806 - Make the base32_decode() API return the number of bytes written,
7807 for consistency with base64_decode(). Closes ticket 28913.
7808 - Move most relay-only periodic events out of mainloop.c into the
7809 relay subsystem. Closes ticket 30414.
7810 - Refactor and encapsulate parts of the codebase that manipulate
7811 crypt_path_t objects. Resolves issue 30236.
7812 - Refactor several places in our code that Coverity incorrectly
7813 believed might have memory leaks. Closes ticket 30147.
7814 - Remove redundant return values in crypto_format, and the
7815 associated return value checks elsewhere in the code. Make the
7816 implementations in crypto_format consistent, and remove redundant
7817 code. Resolves ticket 29660.
7818 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
7819 it is not a constant-time function. Closes ticket 30309.
7820 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
7821 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
7822 bugfix on 0.3.2.1-alpha.
7823 - Simplify v3 onion service link specifier handling code. Fixes bug
7824 23576; bugfix on 0.3.2.1-alpha.
7825 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
7826 code. Resolves ticket 29108.
7827 - Split control.c into several submodules, in preparation for
7828 distributing its current responsibilities throughout the codebase.
7829 Closes ticket 29894.
7830 - Start to move responsibility for knowing about periodic events to
7831 the appropriate subsystems, so that the mainloop doesn't need to
7832 know all the periodic events in the rest of the codebase.
7833 Implements tickets 30293 and 30294.
7836 - Document how to find git commits and tags for bug fixes in
7837 CodingStandards.md. Update some file documentation. Closes
7841 - Remove the linux-tor-prio.sh script from contrib/operator-tools
7842 directory. Resolves issue 29434.
7843 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
7844 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
7847 o Code simplification and refactoring (shell scripts):
7848 - Clean up many of our shell scripts to fix shellcheck warnings.
7849 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
7850 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
7851 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
7852 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
7853 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
7854 nagios-check-tor-authority-cert (ticket 29071),
7855 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
7856 (ticket 29060), test_key_expiration.sh (ticket 30002),
7857 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
7860 o Testing (chutney):
7861 - In "make test-network-all", test IPv6-only v3 single onion
7862 services, using the chutney network single-onion-v23-ipv6-md.
7863 Closes ticket 27251.
7866 Changes in version 0.4.0.5 - 2019-05-02
7867 This is the first stable release in the 0.4.0.x series. It contains
7868 improvements for power management and bootstrap reporting, as well as
7869 preliminary backend support for circuit padding to prevent some kinds
7870 of traffic analysis. It also continues our work in refactoring Tor for
7871 long-term maintainability.
7873 Per our support policy, we will support the 0.4.0.x series for nine
7874 months, or until three months after the release of a stable 0.4.1.x:
7875 whichever is longer. If you need longer-term support, please stick
7876 with 0.3.5.x, which will we plan to support until Feb 2022.
7878 Below are the changes since 0.4.0.4-rc. For a complete list of changes
7879 since 0.3.5.7, see the ReleaseNotes file.
7881 o Minor features (continuous integration):
7882 - In Travis, tell timelimit to use stem's backtrace signals, and
7883 launch python directly from timelimit, so python receives the
7884 signals from timelimit, rather than make. Closes ticket 30117.
7886 o Minor features (diagnostic):
7887 - Add more diagnostic log messages in an attempt to solve the issue
7888 of NUL bytes appearing in a microdescriptor cache. Related to
7891 o Minor features (testing):
7892 - Use the approx_time() function when setting the "Expires" header
7893 in directory replies, to make them more testable. Needed for
7896 o Minor bugfixes (rust):
7897 - Abort on panic in all build profiles, instead of potentially
7898 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
7900 o Minor bugfixes (shellcheck):
7901 - Look for scripts in their correct locations during "make
7902 shellcheck". Previously we had looked in the wrong place during
7903 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
7905 o Minor bugfixes (testing):
7906 - Check the time in the "Expires" header using approx_time(). Fixes
7907 bug 30001; bugfix on 0.4.0.4-rc.
7909 o Minor bugfixes (UI):
7910 - Lower log level of unlink() errors during bootstrap. Fixes bug
7911 29930; bugfix on 0.4.0.1-alpha.
7914 Changes in version 0.4.0.4-rc - 2019-04-11
7915 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
7916 several bugs from earlier versions, including some that had affected
7917 stability, and one that prevented relays from working with NSS.
7919 o Major bugfixes (NSS, relay):
7920 - When running with NSS, disable TLS 1.2 ciphersuites that use
7921 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
7922 these ciphersuites don't work -- which caused relays to fail to
7923 handshake with one another when these ciphersuites were enabled.
7924 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
7926 o Minor features (bandwidth authority):
7927 - Make bandwidth authorities ignore relays that are reported in the
7928 bandwidth file with the flag "vote=0". This change allows us to
7929 report unmeasured relays for diagnostic reasons without including
7930 their bandwidth in the bandwidth authorities' vote. Closes
7932 - When a directory authority is using a bandwidth file to obtain the
7933 bandwidth values that will be included in the next vote, serve
7934 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
7937 o Minor features (circuit padding):
7938 - Stop warning about undefined behavior in the probability
7939 distribution tests. Float division by zero may technically be
7940 undefined behavior in C, but it's well defined in IEEE 754.
7941 Partial backport of 29298. Closes ticket 29527; bugfix
7944 o Minor features (continuous integration):
7945 - On Travis Rust builds, cleanup Rust registry and refrain from
7946 caching the "target/" directory to speed up builds. Resolves
7949 o Minor features (dormant mode):
7950 - Add a DormantCanceledByStartup option to tell Tor that it should
7951 treat a startup event as cancelling any previous dormant state.
7952 Integrators should use this option with caution: it should only be
7953 used if Tor is being started because of something that the user
7954 did, and not if Tor is being automatically started in the
7955 background. Closes ticket 29357.
7957 o Minor features (geoip):
7958 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
7959 Country database. Closes ticket 29992.
7961 o Minor features (NSS, diagnostic):
7962 - Try to log an error from NSS (if there is any) and a more useful
7963 description of our situation if we are using NSS and a call to
7964 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
7966 o Minor bugfixes (security):
7967 - Fix a potential double free bug when reading huge bandwidth files.
7968 The issue is not exploitable in the current Tor network because
7969 the vulnerable code is only reached when directory authorities
7970 read bandwidth files, but bandwidth files come from a trusted
7971 source (usually the authorities themselves). Furthermore, the
7972 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
7973 which are not used by any of the current authorities. Fixes bug
7974 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
7976 - Verify in more places that we are not about to create a buffer
7977 with more than INT_MAX bytes, to avoid possible OOB access in the
7978 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
7979 fixed by Tobias Stoeckmann.
7981 o Minor bugfix (continuous integration):
7982 - Reset coverage state on disk after Travis CI has finished. This
7983 should prevent future coverage merge errors from causing the test
7984 suite for the "process" subsystem to fail. The process subsystem
7985 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
7987 - Terminate test-stem if it takes more than 9.5 minutes to run.
7988 (Travis terminates the job after 10 minutes of no output.)
7989 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
7991 o Minor bugfixes (bootstrap reporting):
7992 - During bootstrap reporting, correctly distinguish pluggable
7993 transports from plain proxies. Fixes bug 28925; bugfix
7996 o Minor bugfixes (C correctness):
7997 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
7998 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
8001 o Minor bugfixes (circuitpadding testing):
8002 - Minor tweaks to avoid rare test failures related to timers and
8003 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
8005 o Minor bugfixes (directory authorities):
8006 - Actually include the bandwidth-file-digest line in directory
8007 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
8009 o Minor bugfixes (logging):
8010 - On Windows, when errors cause us to reload a consensus from disk,
8011 tell the user that we are retrying at log level "notice".
8012 Previously we only logged this information at "info", which was
8013 confusing because the errors themselves were logged at "warning".
8014 Improves previous fix for 28614. Fixes bug 30004; bugfix
8017 o Minor bugfixes (pluggable transports):
8018 - Restore old behavior when it comes to discovering the path of a
8019 given Pluggable Transport executable file. A change in
8020 0.4.0.1-alpha had broken this behavior on paths containing a
8021 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
8023 o Minor bugfixes (testing):
8024 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
8025 recent test-network.sh to use new chutney features in CI. Fixes
8026 bug 29703; bugfix on 0.2.9.1-alpha.
8027 - Fix a test failure on Windows caused by an unexpected "BUG"
8028 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
8031 o Minor bugfixes (TLS protocol):
8032 - When classifying a client's selection of TLS ciphers, if the
8033 client ciphers are not yet available, do not cache the result.
8034 Previously, we had cached the unavailability of the cipher list
8035 and never looked again, which in turn led us to assume that the
8036 client only supported the ancient V1 link protocol. This, in turn,
8037 was causing Stem integration tests to stall in some cases. Fixes
8038 bug 30021; bugfix on 0.2.4.8-alpha.
8040 o Code simplification and refactoring:
8041 - Introduce a connection_dir_buf_add() helper function that detects
8042 whether compression is in use, and adds a string accordingly.
8043 Resolves issue 28816.
8044 - Refactor handle_get_next_bandwidth() to use
8045 connection_dir_buf_add(). Implements ticket 29897.
8048 - Clarify that Tor performs stream isolation among *Port listeners
8049 by default. Resolves issue 29121.
8052 Changes in version 0.4.0.3-alpha - 2019-03-22
8053 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
8054 bugs from earlier versions.
8056 o Minor features (address selection):
8057 - Treat the subnet 100.64.0.0/10 as public for some purposes;
8058 private for others. This subnet is the RFC 6598 (Carrier Grade
8059 NAT) IP range, and is deployed by many ISPs as an alternative to
8060 RFC 1918 that does not break existing internal networks. Tor now
8061 blocks SOCKS and control ports on these addresses and warns users
8062 if client ports or ExtORPorts are listening on a RFC 6598 address.
8063 Closes ticket 28525. Patch by Neel Chauhan.
8065 o Minor features (geoip):
8066 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
8067 Country database. Closes ticket 29666.
8069 o Minor bugfixes (circuitpadding):
8070 - Inspect the circuit-level cell queue before sending padding, to
8071 avoid sending padding when too much data is queued. Fixes bug
8072 29204; bugfix on 0.4.0.1-alpha.
8074 o Minor bugfixes (logging):
8075 - Correct a misleading error message when IPv4Only or IPv6Only is
8076 used but the resolved address can not be interpreted as an address
8077 of the specified IP version. Fixes bug 13221; bugfix on
8078 0.2.3.9-alpha. Patch from Kris Katterjohn.
8079 - Log the correct port number for listening sockets when "auto" is
8080 used to let Tor pick the port number. Previously, port 0 was
8081 logged instead of the actual port number. Fixes bug 29144; bugfix
8082 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8083 - Stop logging a BUG() warning when Tor is waiting for exit
8084 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
8086 o Minor bugfixes (memory management):
8087 - Refactor the shared random state's memory management so that it
8088 actually takes ownership of the shared random value pointers.
8089 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
8091 o Minor bugfixes (memory management, testing):
8092 - Stop leaking parts of the shared random state in the shared-random
8093 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
8095 o Minor bugfixes (pluggable transports):
8096 - Fix an assertion failure crash bug when a pluggable transport is
8097 terminated during the bootstrap phase. Fixes bug 29562; bugfix
8100 o Minor bugfixes (Rust, protover):
8101 - Add a missing "Padding" value to the Rust implementation of
8102 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
8104 o Minor bugfixes (single onion services):
8105 - Allow connections to single onion services to remain idle without
8106 being disconnected. Previously, relays acting as rendezvous points
8107 for single onion services were mistakenly closing idle rendezvous
8108 circuits after 60 seconds, thinking that they were unused
8109 directory-fetching circuits that had served their purpose. Fixes
8110 bug 29665; bugfix on 0.2.1.26.
8112 o Minor bugfixes (stats):
8113 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
8114 relay and bridge extra-info documents. Fixes bug 29017; bugfix
8117 o Minor bugfixes (testing):
8118 - Downgrade some LOG_ERR messages in the address/* tests to
8119 warnings. The LOG_ERR messages were occurring when we had no
8120 configured network. We were failing the unit tests, because we
8121 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
8122 29530; bugfix on 0.3.5.8.
8123 - Fix our gcov wrapper script to look for object files at the
8124 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
8125 - Decrease the false positive rate of stochastic probability
8126 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
8128 o Minor bugfixes (Windows, CI):
8129 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
8130 Windows Server 2012 R2 job. The remaining 2 jobs still provide
8131 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
8132 fast_finish, so failed jobs terminate the build immediately. Fixes
8133 bug 29601; bugfix on 0.3.5.4-alpha.
8136 Changes in version 0.3.5.8 - 2019-02-21
8137 Tor 0.3.5.8 backports several fixes from later releases, including fixes
8138 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
8141 It also includes a fix for a medium-severity security bug affecting Tor
8142 0.3.2.1-alpha and later. All Tor instances running an affected release
8143 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8145 o Major bugfixes (cell scheduler, KIST, security):
8146 - Make KIST consider the outbuf length when computing what it can
8147 put in the outbuf. Previously, KIST acted as though the outbuf
8148 were empty, which could lead to the outbuf becoming too full. It
8149 is possible that an attacker could exploit this bug to cause a Tor
8150 client or relay to run out of memory and crash. Fixes bug 29168;
8151 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8152 TROVE-2019-001 and CVE-2019-8955.
8154 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
8155 - Gracefully handle empty username/password fields in SOCKS5
8156 username/password auth message and allow SOCKS5 handshake to
8157 continue. Previously, we had rejected these handshakes, breaking
8158 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
8160 o Minor features (compilation, backport from 0.4.0.2-alpha):
8161 - Compile correctly when OpenSSL is built with engine support
8162 disabled, or with deprecated APIs disabled. Closes ticket 29026.
8163 Patches from "Mangix".
8165 o Minor features (geoip):
8166 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8167 Country database. Closes ticket 29478.
8169 o Minor features (testing, backport from 0.4.0.2-alpha):
8170 - Treat all unexpected ERR and BUG messages as test failures. Closes
8173 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
8174 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8175 connection waiting for a descriptor that we actually have in the
8176 cache. It turns out that this can actually happen, though it is
8177 rare. Now, tor will recover and retry the descriptor. Fixes bug
8178 28669; bugfix on 0.3.2.4-alpha.
8180 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
8181 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
8182 IPv6 socket was bound using an address family of AF_INET instead
8183 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
8186 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
8187 - Update Cargo.lock file to match the version made by the latest
8188 version of Rust, so that "make distcheck" will pass again. Fixes
8189 bug 29244; bugfix on 0.3.3.4-alpha.
8191 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
8192 - Select guards even if the consensus has expired, as long as the
8193 consensus is still reasonably live. Fixes bug 24661; bugfix
8196 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
8197 - Compile correctly on OpenBSD; previously, we were missing some
8198 headers required in order to detect it properly. Fixes bug 28938;
8199 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8201 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
8202 - Describe the contents of the v3 onion service client authorization
8203 files correctly: They hold public keys, not private keys. Fixes
8204 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
8206 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
8207 - Rework rep_hist_log_link_protocol_counts() to iterate through all
8208 link protocol versions when logging incoming/outgoing connection
8209 counts. Tor no longer skips version 5, and we won't have to
8210 remember to update this function when new link protocol version is
8211 developed. Fixes bug 28920; bugfix on 0.2.6.10.
8213 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
8214 - Log more information at "warning" level when unable to read a
8215 private key; log more information at "info" level when unable to
8216 read a public key. We had warnings here before, but they were lost
8217 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
8219 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
8220 - The amount of total available physical memory is now determined
8221 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
8222 when it is defined and a 64-bit variant is not available. Fixes
8223 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
8225 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
8226 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
8227 than one private key for a hidden service. Fixes bug 29040; bugfix
8229 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
8230 "debug" level. Tor used to log it as a warning, which caused very
8231 long log lines to appear for some users. Fixes bug 29135; bugfix
8233 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8234 as a warning. Instead, log it as a protocol warning, because there
8235 is nothing that relay operators can do to fix it. Fixes bug 29029;
8236 bugfix on 0.2.5.7-rc.
8238 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
8239 - Mark outdated dirservers when Tor only has a reasonably live
8240 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
8242 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
8243 - Detect and suppress "bug" warnings from the util/time test on
8244 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
8245 - Do not log an error-level message if we fail to find an IPv6
8246 network interface from the unit tests. Fixes bug 29160; bugfix
8249 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
8250 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8251 Some users took this phrasing to mean that the mentioned guard was
8252 under their control or responsibility, which it is not. Fixes bug
8253 28895; bugfix on Tor 0.3.0.1-alpha.
8256 Changes in version 0.3.4.11 - 2019-02-21
8257 Tor 0.3.4.11 is the third stable release in its series. It includes
8258 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
8259 later. All Tor instances running an affected release should upgrade to
8260 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8262 o Major bugfixes (cell scheduler, KIST, security):
8263 - Make KIST consider the outbuf length when computing what it can
8264 put in the outbuf. Previously, KIST acted as though the outbuf
8265 were empty, which could lead to the outbuf becoming too full. It
8266 is possible that an attacker could exploit this bug to cause a Tor
8267 client or relay to run out of memory and crash. Fixes bug 29168;
8268 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8269 TROVE-2019-001 and CVE-2019-8955.
8271 o Minor features (geoip):
8272 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8273 Country database. Closes ticket 29478.
8275 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
8276 - Update Cargo.lock file to match the version made by the latest
8277 version of Rust, so that "make distcheck" will pass again. Fixes
8278 bug 29244; bugfix on 0.3.3.4-alpha.
8280 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
8281 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8282 as a warning. Instead, log it as a protocol warning, because there
8283 is nothing that relay operators can do to fix it. Fixes bug 29029;
8284 bugfix on 0.2.5.7-rc.
8287 Changes in version 0.3.3.12 - 2019-02-21
8288 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
8289 0.3.2.1-alpha and later. All Tor instances running an affected release
8290 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8292 This release marks the end of support for the Tor 0.3.3.x series. We
8293 recommend that users switch to either the Tor 0.3.4 series (supported
8294 until at least 10 June 2019), or the Tor 0.3.5 series, which will
8295 receive long-term support until at least 1 Feb 2022.
8297 o Major bugfixes (cell scheduler, KIST, security):
8298 - Make KIST consider the outbuf length when computing what it can
8299 put in the outbuf. Previously, KIST acted as though the outbuf
8300 were empty, which could lead to the outbuf becoming too full. It
8301 is possible that an attacker could exploit this bug to cause a Tor
8302 client or relay to run out of memory and crash. Fixes bug 29168;
8303 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8304 TROVE-2019-001 and CVE-2019-8955.
8306 o Minor features (geoip):
8307 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8308 Country database. Closes ticket 29478.
8310 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
8311 - Update Cargo.lock file to match the version made by the latest
8312 version of Rust, so that "make distcheck" will pass again. Fixes
8313 bug 29244; bugfix on 0.3.3.4-alpha.
8315 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
8316 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8317 as a warning. Instead, log it as a protocol warning, because there
8318 is nothing that relay operators can do to fix it. Fixes bug 29029;
8319 bugfix on 0.2.5.7-rc.
8322 Changes in version 0.4.0.2-alpha - 2019-02-21
8323 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
8324 bugs from earlier versions, including several that had broken
8325 backward compatibility.
8327 It also includes a fix for a medium-severity security bug affecting Tor
8328 0.3.2.1-alpha and later. All Tor instances running an affected release
8329 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8331 o Major bugfixes (cell scheduler, KIST, security):
8332 - Make KIST consider the outbuf length when computing what it can
8333 put in the outbuf. Previously, KIST acted as though the outbuf
8334 were empty, which could lead to the outbuf becoming too full. It
8335 is possible that an attacker could exploit this bug to cause a Tor
8336 client or relay to run out of memory and crash. Fixes bug 29168;
8337 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8338 TROVE-2019-001 and CVE-2019-8955.
8340 o Major bugfixes (networking):
8341 - Gracefully handle empty username/password fields in SOCKS5
8342 username/password auth messsage and allow SOCKS5 handshake to
8343 continue. Previously, we had rejected these handshakes, breaking
8344 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
8346 o Major bugfixes (windows, startup):
8347 - When reading a consensus file from disk, detect whether it was
8348 written in text mode, and re-read it in text mode if so. Always
8349 write consensus files in binary mode so that we can map them into
8350 memory later. Previously, we had written in text mode, which
8351 confused us when we tried to map the file on windows. Fixes bug
8352 28614; bugfix on 0.4.0.1-alpha.
8354 o Minor features (compilation):
8355 - Compile correctly when OpenSSL is built with engine support
8356 disabled, or with deprecated APIs disabled. Closes ticket 29026.
8357 Patches from "Mangix".
8359 o Minor features (developer tooling):
8360 - Check that bugfix versions in changes files look like Tor versions
8361 from the versions spec. Warn when bugfixes claim to be on a future
8362 release. Closes ticket 27761.
8363 - Provide a git pre-commit hook that disallows committing if we have
8364 any failures in our code and changelog formatting checks. It is
8365 now available in scripts/maint/pre-commit.git-hook. Implements
8368 o Minor features (directory authority):
8369 - When a directory authority is using a bandwidth file to obtain
8370 bandwidth values, include the digest of that file in the vote.
8371 Closes ticket 26698.
8373 o Minor features (geoip):
8374 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8375 Country database. Closes ticket 29478.
8377 o Minor features (testing):
8378 - Treat all unexpected ERR and BUG messages as test failures. Closes
8381 o Minor bugfixes (build, compatibility, rust):
8382 - Update Cargo.lock file to match the version made by the latest
8383 version of Rust, so that "make distcheck" will pass again. Fixes
8384 bug 29244; bugfix on 0.3.3.4-alpha.
8386 o Minor bugfixes (compilation):
8387 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
8388 29169; bugfix on 0.4.0.1-alpha.
8389 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
8390 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
8392 o Minor bugfixes (documentation):
8393 - Describe the contents of the v3 onion service client authorization
8394 files correctly: They hold public keys, not private keys. Fixes
8395 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
8397 o Minor bugfixes (linux seccomp sandbox):
8398 - Fix startup crash when experimental sandbox support is enabled.
8399 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
8401 o Minor bugfixes (logging):
8402 - Avoid logging that we are relaxing a circuit timeout when that
8403 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
8404 - Log more information at "warning" level when unable to read a
8405 private key; log more information at "info" level when unable to
8406 read a public key. We had warnings here before, but they were lost
8407 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
8409 o Minor bugfixes (misc):
8410 - The amount of total available physical memory is now determined
8411 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
8412 when it is defined and a 64-bit variant is not available. Fixes
8413 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
8415 o Minor bugfixes (onion services):
8416 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
8417 than one private key for a hidden service. Fixes bug 29040; bugfix
8419 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
8420 "debug" level. Tor used to log it as a warning, which caused very
8421 long log lines to appear for some users. Fixes bug 29135; bugfix
8423 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8424 as a warning. Instead, log it as a protocol warning, because there
8425 is nothing that relay operators can do to fix it. Fixes bug 29029;
8426 bugfix on 0.2.5.7-rc.
8428 o Minor bugfixes (scheduler):
8429 - When re-adding channels to the pending list, check the correct
8430 channel's sched_heap_idx. This issue has had no effect in mainline
8431 Tor, but could have led to bugs down the road in improved versions
8432 of our circuit scheduling code. Fixes bug 29508; bugfix
8435 o Minor bugfixes (tests):
8436 - Fix intermittent failures on an adaptive padding test. Fixes one
8437 case of bug 29122; bugfix on 0.4.0.1-alpha.
8438 - Disable an unstable circuit-padding test that was failing
8439 intermittently because of an ill-defined small histogram. Such
8440 histograms will be allowed again after 29298 is implemented. Fixes
8441 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
8442 - Detect and suppress "bug" warnings from the util/time test on
8443 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
8444 - Do not log an error-level message if we fail to find an IPv6
8445 network interface from the unit tests. Fixes bug 29160; bugfix
8449 - In the manpage entry describing MapAddress torrc setting, use
8450 example IP addresses from ranges specified for use in documentation
8451 by RFC 5737. Resolves issue 28623.
8454 - Remove the old check-tor script. Resolves issue 29072.
8457 Changes in version 0.4.0.1-alpha - 2019-01-18
8458 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
8459 introduces improved features for power and bandwidth conservation,
8460 more accurate reporting of bootstrap progress for user interfaces, and
8461 an experimental backend for an exciting new adaptive padding feature.
8462 There is also the usual assortment of bugfixes and minor features, all
8465 o Major features (battery management, client, dormant mode):
8466 - When Tor is running as a client, and it is unused for a long time,
8467 it can now enter a "dormant" state. When Tor is dormant, it avoids
8468 network and CPU activity until it is reawoken either by a user
8469 request or by a controller command. For more information, see the
8470 configuration options starting with "Dormant". Implements tickets
8472 - The client's memory of whether it is "dormant", and how long it
8473 has spent idle, persists across invocations. Implements
8475 - There is a DormantOnFirstStartup option that integrators can use
8476 if they expect that in many cases, Tor will be installed but
8479 o Major features (bootstrap reporting):
8480 - When reporting bootstrap progress, report the first connection
8481 uniformly, regardless of whether it's a connection for building
8482 application circuits. This allows finer-grained reporting of early
8483 progress than previously possible, with the improvements of ticket
8484 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
8485 - When reporting bootstrap progress, treat connecting to a proxy or
8486 pluggable transport as separate from having successfully used that
8487 proxy or pluggable transport to connect to a relay. Closes tickets
8490 o Major features (circuit padding):
8491 - Implement preliminary support for the circuit padding portion of
8492 Proposal 254. The implementation supports Adaptive Padding (aka
8493 WTF-PAD) state machines for use between experimental clients and
8494 relays. Support is also provided for APE-style state machines that
8495 use probability distributions instead of histograms to specify
8496 inter-packet delay. At the moment, Tor does not provide any
8497 padding state machines that are used in normal operation: for now,
8498 this feature exists solely for experimentation. Closes
8501 o Major features (refactoring):
8502 - Tor now uses an explicit list of its own subsystems when
8503 initializing and shutting down. Previously, these systems were
8504 managed implicitly in various places throughout the codebase.
8505 (There may still be some subsystems using the old system.) Closes
8508 o Minor features (bootstrap reporting):
8509 - When reporting bootstrap progress, stop distinguishing between
8510 situations where only internal paths are available and situations
8511 where external paths are available. Previously, Tor would often
8512 erroneously report that it had only internal paths. Closes
8515 o Minor features (continuous integration):
8516 - Log Python version during each Travis CI job. Resolves
8519 o Minor features (controller):
8520 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
8521 Implements ticket 28843.
8523 o Minor features (developer tooling):
8524 - Provide a git hook script to prevent "fixup!" and "squash!"
8525 commits from ending up in the master branch, as scripts/main/pre-
8526 push.git-hook. Closes ticket 27993.
8528 o Minor features (directory authority):
8529 - Directory authorities support a new consensus algorithm, under
8530 which the family lines in microdescriptors are encoded in a
8531 canonical form. This change makes family lines more compressible
8532 in transit, and on the client. Closes ticket 28266; implements
8535 o Minor features (directory authority, relay):
8536 - Authorities now vote on a "StaleDesc" flag to indicate that a
8537 relay's descriptor is so old that the relay should upload again
8538 soon. Relays treat this flag as a signal to upload a new
8539 descriptor. This flag will eventually let us remove the
8540 'published' date from routerstatus entries, and make our consensus
8541 diffs much smaller. Closes ticket 26770; implements proposal 293.
8543 o Minor features (fallback directory mirrors):
8544 - Update the fallback whitelist based on operator opt-ins and opt-
8545 outs. Closes ticket 24805, patch by Phoul.
8547 o Minor features (FreeBSD):
8548 - On FreeBSD-based systems, warn relay operators if the
8549 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
8550 Closes ticket 28518.
8552 o Minor features (HTTP standards compliance):
8553 - Stop sending the header "Content-type: application/octet-stream"
8554 along with transparently compressed documents: this confused
8555 browsers. Closes ticket 28100.
8557 o Minor features (IPv6):
8558 - We add an option ClientAutoIPv6ORPort, to make clients randomly
8559 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
8560 every time a node is loaded from a new consensus or bridge config.
8561 We expect that this option will enable clients to bootstrap more
8562 quickly without having to determine whether they support IPv4,
8563 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
8564 - When using addrs_in_same_network_family(), avoid choosing circuit
8565 paths that pass through the same IPv6 subnet more than once.
8566 Previously, we only checked IPv4 subnets. Closes ticket 24393.
8567 Patch by Neel Chauhan.
8569 o Minor features (log messages):
8570 - Improve log message in v3 onion services that could print out
8571 negative revision counters. Closes ticket 27707. Patch
8574 o Minor features (memory usage):
8575 - Save memory by storing microdescriptor family lists with a more
8576 compact representation. Closes ticket 27359.
8577 - Tor clients now use mmap() to read consensus files from disk, so
8578 that they no longer need keep the full text of a consensus in
8579 memory when parsing it or applying a diff. Closes ticket 27244.
8581 o Minor features (parsing):
8582 - Directory authorities now validate that router descriptors and
8583 ExtraInfo documents are in a valid subset of UTF-8, and reject
8584 them if they are not. Closes ticket 27367.
8586 o Minor features (performance):
8587 - Cache the results of summarize_protocol_flags(), so that we don't
8588 have to parse the same protocol-versions string over and over.
8589 This should save us a huge number of malloc calls on startup, and
8590 may reduce memory fragmentation with some allocators. Closes
8592 - Remove a needless memset() call from get_token_arguments, thereby
8593 speeding up the tokenization of directory objects by about 20%.
8594 Closes ticket 28852.
8595 - Replace parse_short_policy() with a faster implementation, to
8596 improve microdescriptor parsing time. Closes ticket 28853.
8597 - Speed up directory parsing a little by avoiding use of the non-
8598 inlined strcmp_len() function. Closes ticket 28856.
8599 - Speed up microdescriptor parsing by about 30%, to help improve
8600 startup time. Closes ticket 28839.
8602 o Minor features (pluggable transports):
8603 - Add support for emitting STATUS updates to Tor's control port from
8604 a pluggable transport process. Closes ticket 28846.
8605 - Add support for logging to Tor's logging subsystem from a
8606 pluggable transport process. Closes ticket 28180.
8608 o Minor features (process management):
8609 - Add a new process API for handling child processes. This new API
8610 allows Tor to have bi-directional communication with child
8611 processes on both Unix and Windows. Closes ticket 28179.
8612 - Use the subsystem manager to initialize and shut down the process
8613 module. Closes ticket 28847.
8615 o Minor features (relay):
8616 - When listing relay families, list them in canonical form including
8617 the relay's own identity, and try to give a more useful set of
8618 warnings. Part of ticket 28266 and proposal 298.
8620 o Minor features (required protocols):
8621 - Before exiting because of a missing required protocol, Tor will
8622 now check the publication time of the consensus, and not exit
8623 unless the consensus is newer than the Tor program's own release
8624 date. Previously, Tor would not check the consensus publication
8625 time, and so might exit because of a missing protocol that might
8626 no longer be required in a current consensus. Implements proposal
8627 297; closes ticket 27735.
8629 o Minor features (testing):
8630 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
8631 networks. Closes ticket 28840. Patch by Rob Jansen.
8633 o Minor bugfixes (client, clock skew):
8634 - Bootstrap successfully even when Tor's clock is behind the clocks
8635 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
8636 - Select guards even if the consensus has expired, as long as the
8637 consensus is still reasonably live. Fixes bug 24661; bugfix
8640 o Minor bugfixes (compilation):
8641 - Compile correctly on OpenBSD; previously, we were missing some
8642 headers required in order to detect it properly. Fixes bug 28938;
8643 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8645 o Minor bugfixes (directory clients):
8646 - Mark outdated dirservers when Tor only has a reasonably live
8647 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
8649 o Minor bugfixes (directory mirrors):
8650 - Even when a directory mirror's clock is behind the clocks on the
8651 authorities, we now allow the mirror to serve "future"
8652 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
8654 o Minor bugfixes (DNS):
8655 - Gracefully handle an empty or absent resolve.conf file by falling
8656 back to using "localhost" as a DNS server (and hoping it works).
8657 Previously, we would just stop running as an exit. Fixes bug
8658 21900; bugfix on 0.2.1.10-alpha.
8660 o Minor bugfixes (guards):
8661 - In count_acceptable_nodes(), the minimum number is now one bridge
8662 or guard node, and two non-guard nodes for a circuit. Previously,
8663 we had added up the sum of all nodes with a descriptor, but that
8664 could cause us to build failing circuits when we had either too
8665 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
8666 0.2.3.1-alpha. Patch by Neel Chauhan.
8668 o Minor bugfixes (IPv6):
8669 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
8670 IPv6 socket was bound using an address family of AF_INET instead
8671 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
8674 o Minor bugfixes (logging):
8675 - Rework rep_hist_log_link_protocol_counts() to iterate through all
8676 link protocol versions when logging incoming/outgoing connection
8677 counts. Tor no longer skips version 5, and we won't have to
8678 remember to update this function when new link protocol version is
8679 developed. Fixes bug 28920; bugfix on 0.2.6.10.
8681 o Minor bugfixes (networking):
8682 - Introduce additional checks into tor_addr_parse() to reject
8683 certain incorrect inputs that previously were not detected. Fixes
8684 bug 23082; bugfix on 0.2.0.10-alpha.
8686 o Minor bugfixes (onion service v3, client):
8687 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8688 connection waiting for a descriptor that we actually have in the
8689 cache. It turns out that this can actually happen, though it is
8690 rare. Now, tor will recover and retry the descriptor. Fixes bug
8691 28669; bugfix on 0.3.2.4-alpha.
8693 o Minor bugfixes (periodic events):
8694 - Refrain from calling routerlist_remove_old_routers() from
8695 check_descriptor_callback(). Instead, create a new hourly periodic
8696 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
8698 o Minor bugfixes (pluggable transports):
8699 - Make sure that data is continously read from standard output and
8700 standard error pipes of a pluggable transport child-process, to
8701 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
8702 bugfix on 0.2.3.6-alpha.
8704 o Minor bugfixes (unit tests):
8705 - Instead of relying on hs_free_all() to clean up all onion service
8706 objects in test_build_descriptors(), we now deallocate them one by
8707 one. This lets Coverity know that we are not leaking memory there
8708 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
8710 o Minor bugfixes (usability):
8711 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8712 Some users took this phrasing to mean that the mentioned guard was
8713 under their control or responsibility, which it is not. Fixes bug
8714 28895; bugfix on Tor 0.3.0.1-alpha.
8716 o Code simplification and refactoring:
8717 - Reimplement NETINFO cell parsing and generation to rely on
8718 trunnel-generated wire format handling code. Closes ticket 27325.
8719 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
8721 - Rework SOCKS wire format handling to rely on trunnel-generated
8722 parsing/generation code. Resolves ticket 27620.
8723 - Split out bootstrap progress reporting from control.c into a
8724 separate file. Part of ticket 27402.
8725 - The .may_include files that we use to describe our directory-by-
8726 directory dependency structure now describe a noncircular
8727 dependency graph over the directories that they cover. Our
8728 checkIncludes.py tool now enforces this noncircularity. Closes
8732 - Mention that you cannot add a new onion service if Tor is already
8733 running with Sandbox enabled. Closes ticket 28560.
8734 - Improve ControlPort documentation. Mention that it accepts
8735 address:port pairs, and can be used multiple times. Closes
8737 - Document the exact output of "tor --version". Closes ticket 28889.
8740 - Stop responding to the 'GETINFO status/version/num-concurring' and
8741 'GETINFO status/version/num-versioning' control port commands, as
8742 those were deprecated back in 0.2.0.30. Also stop listing them in
8743 output of 'GETINFO info/names'. Resolves ticket 28757.
8744 - The scripts used to generate and maintain the list of fallback
8745 directories have been extracted into a new "fallback-scripts"
8746 repository. Closes ticket 27914.
8749 - Run shellcheck for scripts in the in scripts/ directory. Closes
8751 - Add unit tests for tokenize_string() and get_next_token()
8752 functions. Resolves ticket 27625.
8754 o Code simplification and refactoring (onion service v3):
8755 - Consolidate the authorized client descriptor cookie computation
8756 code from client and service into one function. Closes
8759 o Code simplification and refactoring (shell scripts):
8760 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
8762 - Fix issues that shellcheck found in chutney-git-bisect.sh.
8763 Resolves ticket 28006.
8764 - Fix issues that shellcheck found in updateRustDependencies.sh.
8765 Resolves ticket 28012.
8766 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
8767 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
8768 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
8769 - Fix shellcheck warnings in scripts/test/coverage. Resolves
8773 Changes in version 0.3.3.11 - 2019-01-07
8774 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
8775 numerous fixes, including an important fix for anyone using OpenSSL
8776 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
8777 to this version, or to a later series.
8779 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
8780 We anticipate that this will be the last release of Tor 0.3.3, unless
8781 some major bug is before then. Some time between now and then, users
8782 should switch to either the Tor 0.3.4 series (supported until at least
8783 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
8784 support until at least 1 Feb 2022.
8786 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8787 - Fix our usage of named groups when running as a TLS 1.3 client in
8788 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8789 running as a relay, which caused clients to fail to negotiate TLS
8790 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8793 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8794 - Fix a use-after-free error that could be caused by passing Tor an
8795 impossible set of options that would fail during options_act().
8796 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8798 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8799 - Only run one online rust build in Travis, to reduce network
8800 errors. Skip offline rust builds on Travis for Linux gcc, because
8801 they're redundant. Implements ticket 27252.
8802 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8803 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8804 Linux with default settings, because all the non-default builds
8805 use gcc on Linux. Implements ticket 27252.
8807 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8808 - Use the Travis Homebrew addon to install packages on macOS during
8809 Travis CI. The package list is the same, but the Homebrew addon
8810 does not do a `brew update` by default. Implements ticket 27738.
8812 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8813 - Replace the 150 fallbacks originally introduced in Tor
8814 0.3.3.1-alpha in January 2018 (of which ~115 were still
8815 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8816 removed) generated in December 2018. Closes ticket 24803.
8818 o Minor features (geoip):
8819 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8820 Country database. Closes ticket 29012.
8822 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8823 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8824 key export function from handling long labels. When this bug is
8825 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8826 version of OpenSSL without this bug when it becomes available.
8827 Closes ticket 28973.
8829 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8830 - Update relay descriptor on bandwidth changes only when the uptime
8831 is smaller than 24h, in order to reduce the efficiency of guard
8832 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8834 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
8835 - Avoid undefined behavior in an end-of-string check when parsing
8836 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8839 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8840 - Rewrite our assertion macros so that they no longer suppress the
8841 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8843 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8844 - Initialize a variable unconditionally in aes_new_cipher(), since
8845 some compilers cannot tell that we always initialize it before
8846 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8848 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
8849 - Log additional info when we get a relay that shares an ed25519 ID
8850 with a different relay, instead making a BUG() warning. Fixes bug
8851 27800; bugfix on 0.3.2.1-alpha.
8853 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8854 - When a user requests a group-readable DataDirectory, give it to
8855 them. Previously, when the DataDirectory and the CacheDirectory
8856 were the same, the default setting (0) for
8857 CacheDirectoryGroupReadable would override the setting for
8858 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8861 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8862 - When the onion service directory can't be created or has the wrong
8863 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8866 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8867 - Close all SOCKS request (for the same .onion) if the newly fetched
8868 descriptor is unusable. Before that, we would close only the first
8869 one leaving the other hanging and let to time out by themselves.
8870 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8872 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8873 - Don't warn so loudly when Tor is unable to decode an onion
8874 descriptor. This can now happen as a normal use case if a client
8875 gets a descriptor with client authorization but the client is not
8876 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8878 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8879 - When deleting an ephemeral onion service (DEL_ONION), do not close
8880 any rendezvous circuits in order to let the existing client
8881 connections finish by themselves or closed by the application. The
8882 HS v2 is doing that already so now we have the same behavior for
8883 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8885 o Minor bugfixes (HTTP tunnel):
8886 - Fix a bug warning when closing an HTTP tunnel connection due to
8887 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
8890 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8891 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8892 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8894 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8895 - Ensure circuitmux queues are empty before scheduling or sending
8896 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8898 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8899 - Reject protocol names containing bytes other than alphanumeric
8900 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8903 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8904 - Compute protover votes correctly in the rust version of the
8905 protover code. Previously, the protover rewrite in 24031 allowed
8906 repeated votes from the same voter for the same protocol version
8907 to be counted multiple times in protover_compute_vote(). Fixes bug
8908 27649; bugfix on 0.3.3.5-rc.
8909 - Reject protover names that contain invalid characters. Fixes bug
8910 27687; bugfix on 0.3.3.1-alpha.
8912 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8913 - protover_all_supported() would attempt to allocate up to 16GB on
8914 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8915 bugfix on 0.3.3.5-rc.
8917 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
8918 - Fix a potential null dereference in protover_all_supported(). Add
8919 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8920 - Return a string that can be safely freed by C code, not one
8921 created by the rust allocator, in protover_all_supported(). Fixes
8922 bug 27740; bugfix on 0.3.3.1-alpha.
8923 - Fix an API mismatch in the rust implementation of
8924 protover_compute_vote(). This bug could have caused crashes on any
8925 directory authorities running Tor with Rust (which we do not yet
8926 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8928 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8929 - If a unit test running in a subprocess exits abnormally or with a
8930 nonzero status code, treat the test as having failed, even if the
8931 test reported success. Without this fix, memory leaks don't cause
8932 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8933 bugfix on 0.2.2.4-alpha.
8935 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
8936 - Treat backtrace test failures as expected on BSD-derived systems
8937 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8938 (FreeBSD failures have been treated as expected since 18204 in
8939 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8941 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8942 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8943 bugfix on 0.3.0.1-alpha.
8946 Changes in version 0.3.4.10 - 2019-01-07
8947 Tor 0.3.4.9 is the second stable release in its series; it backports
8948 numerous fixes, including an important fix for relays, and for anyone
8949 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
8952 As a reminder, the Tor 0.3.4 series will be supported until 10 June
8953 2019. Some time between now and then, users should switch to the Tor
8954 0.3.5 series, which will receive long-term support until at least 1
8957 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8958 - Fix our usage of named groups when running as a TLS 1.3 client in
8959 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8960 running as a relay, which caused clients to fail to negotiate TLS
8961 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8964 o Major bugfixes (relay, directory, backport from 0.3.5.7):
8965 - Always reactivate linked connections in the main loop so long as
8966 any linked connection has been active. Previously, connections
8967 serving directory information wouldn't get reactivated after the
8968 first chunk of data was sent (usually 32KB), which would prevent
8969 clients from bootstrapping. Fixes bug 28912; bugfix on
8970 0.3.4.1-alpha. Patch by "cypherpunks3".
8972 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
8973 - Always show the configure and test logs, and upload them as build
8974 artifacts, when building for Windows using Appveyor CI.
8977 o Minor features (controller, backport from 0.3.5.1-alpha):
8978 - For purposes of CIRC_BW-based dropped cell detection, track half-
8979 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8980 bias check cells to arrive without counting it as dropped until
8981 either the END arrives, or the windows are empty. Closes
8984 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8985 - Replace the 150 fallbacks originally introduced in Tor
8986 0.3.3.1-alpha in January 2018 (of which ~115 were still
8987 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8988 removed) generated in December 2018. Closes ticket 24803.
8990 o Minor features (geoip):
8991 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8992 Country database. Closes ticket 28395.
8994 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8995 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8996 key export function from handling long labels. When this bug is
8997 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8998 version of OpenSSL without this bug when it becomes available.
8999 Closes ticket 28973.
9001 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
9002 - Initialize a variable unconditionally in aes_new_cipher(), since
9003 some compilers cannot tell that we always initialize it before
9004 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
9006 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
9007 - Avoid a logging a BUG() stacktrace when closing connection held
9008 open because the write side is rate limited but not the read side.
9009 Now, the connection read side is simply shut down until Tor is
9010 able to flush the connection and close it. Fixes bug 27750; bugfix
9013 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
9014 - Manually configure the zstd compiler options, when building using
9015 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
9016 not come with a pkg-config file. Fixes bug 28454; bugfix
9018 - Stop using an external OpenSSL install, and stop installing MSYS2
9019 packages, when building using mingw on Appveyor Windows CI. Fixes
9020 bug 28399; bugfix on 0.3.4.1-alpha.
9022 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
9023 - Explicitly specify the path to the OpenSSL library and do not
9024 download OpenSSL from Pacman, but instead use the library that is
9025 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
9027 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
9028 - When a user requests a group-readable DataDirectory, give it to
9029 them. Previously, when the DataDirectory and the CacheDirectory
9030 were the same, the default setting (0) for
9031 CacheDirectoryGroupReadable would override the setting for
9032 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
9035 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
9036 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
9037 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
9039 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
9040 - Don't warn so loudly when Tor is unable to decode an onion
9041 descriptor. This can now happen as a normal use case if a client
9042 gets a descriptor with client authorization but the client is not
9043 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
9045 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
9046 - When deleting an ephemeral onion service (DEL_ONION), do not close
9047 any rendezvous circuits in order to let the existing client
9048 connections finish by themselves or closed by the application. The
9049 HS v2 is doing that already so now we have the same behavior for
9050 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
9052 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
9053 - Update relay descriptor on bandwidth changes only when the uptime
9054 is smaller than 24h, in order to reduce the efficiency of guard
9055 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
9057 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
9058 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
9059 bugfix on 0.3.0.1-alpha.
9062 Changes in version 0.3.5.7 - 2019-01-07
9063 Tor 0.3.5.7 is the first stable release in its series; it includes
9064 compilation and portability fixes, and a fix for a severe problem
9065 affecting directory caches.
9067 The Tor 0.3.5 series includes several new features and performance
9068 improvements, including client authorization for v3 onion services,
9069 cleanups to bootstrap reporting, support for improved bandwidth-
9070 measurement tools, experimental support for NSS in place of OpenSSL,
9071 and much more. It also begins a full reorganization of Tor's code
9072 layout, for improved modularity and maintainability in the future.
9073 Finally, there is the usual set of performance improvements and
9074 bugfixes that we try to do in every release series.
9076 There are a couple of changes in the 0.3.5 that may affect
9077 compatibility. First, the default version for newly created onion
9078 services is now v3. Use the HiddenServiceVersion option if you want to
9079 override this. Second, some log messages related to bootstrapping have
9080 changed; if you use stem, you may need to update to the latest version
9081 so it will recognize them.
9083 We have designated 0.3.5 as a "long-term support" (LTS) series: we
9084 will continue to patch major bugs in typical configurations of 0.3.5
9085 until at least 1 Feb 2022. (We do not plan to provide long-term
9086 support for embedding, Rust support, NSS support, running a directory
9087 authority, or unsupported platforms. For these, you will need to stick
9088 with the latest stable release.)
9090 Below are the changes since 0.3.5.6-rc. For a complete list of changes
9091 since 0.3.4.9, see the ReleaseNotes file.
9093 o Major bugfixes (relay, directory):
9094 - Always reactivate linked connections in the main loop so long as
9095 any linked connection has been active. Previously, connections
9096 serving directory information wouldn't get reactivated after the
9097 first chunk of data was sent (usually 32KB), which would prevent
9098 clients from bootstrapping. Fixes bug 28912; bugfix on
9099 0.3.4.1-alpha. Patch by "cypherpunks3".
9101 o Minor features (compilation):
9102 - When possible, place our warning flags in a separate file, to
9103 avoid flooding verbose build logs. Closes ticket 28924.
9105 o Minor features (geoip):
9106 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
9107 Country database. Closes ticket 29012.
9109 o Minor features (OpenSSL bug workaround):
9110 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
9111 key export function from handling long labels. When this bug is
9112 detected, Tor will disable TLS 1.3. We recommend upgrading to a
9113 version of OpenSSL without this bug when it becomes available.
9114 Closes ticket 28973.
9116 o Minor features (performance):
9117 - Remove about 96% of the work from the function that we run at
9118 startup to test our curve25519_basepoint implementation. Since
9119 this function has yet to find an actual failure, we now only run
9120 it for 8 iterations instead of 200. Based on our profile
9121 information, this change should save around 8% of our startup time
9122 on typical desktops, and may have a similar effect on other
9123 platforms. Closes ticket 28838.
9124 - Stop re-validating our hardcoded Diffie-Hellman parameters on
9125 every startup. Doing this wasted time and cycles, especially on
9126 low-powered devices. Closes ticket 28851.
9128 o Minor bugfixes (compilation):
9129 - Fix compilation for Android by adding a missing header to
9130 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
9132 o Minor bugfixes (correctness):
9133 - Fix an unreached code path where we checked the value of
9134 "hostname" inside send_resolved_hostname_cell(). Previously, we
9135 used it before checking it; now we check it first. Fixes bug
9136 28879; bugfix on 0.1.2.7-alpha.
9138 o Minor bugfixes (testing):
9139 - Make sure that test_rebind.py actually obeys its timeout, even
9140 when it receives a large number of log messages. Fixes bug 28883;
9141 bugfix on 0.3.5.4-alpha.
9142 - Stop running stem's unit tests as part of "make test-stem", but
9143 continue to run stem's unit and online tests during "make test-
9144 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
9146 o Minor bugfixes (windows services):
9147 - Make Tor start correctly as an NT service again: previously it was
9148 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
9150 o Code simplification and refactoring:
9151 - When parsing a port configuration, make it more obvious to static
9152 analyzer tools that we always initialize the address. Closes
9156 Changes in version 0.3.5.6-rc - 2018-12-18
9157 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
9158 It is the first release candidate in the 0.3.5.x series; if no further
9159 huge bugs are found, our next release may be the stable 0.3.5.x.
9161 o Minor features (continuous integration, Windows):
9162 - Always show the configure and test logs, and upload them as build
9163 artifacts, when building for Windows using Appveyor CI.
9166 o Minor features (fallback directory list):
9167 - Replace the 150 fallbacks originally introduced in Tor
9168 0.3.3.1-alpha in January 2018 (of which ~115 were still
9169 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
9170 removed) generated in December 2018. Closes ticket 24803.
9172 o Minor features (geoip):
9173 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
9174 Country database. Closes ticket 28744.
9176 o Minor bugfixes (compilation):
9177 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
9178 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
9180 o Minor bugfixes (continuous integration, Windows):
9181 - Explicitly specify the path to the OpenSSL library and do not
9182 download OpenSSL from Pacman, but instead use the library that is
9183 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
9185 o Minor bugfixes (onion service v3):
9186 - When deleting an ephemeral onion service (DEL_ONION), do not close
9187 any rendezvous circuits in order to let the existing client
9188 connections finish by themselves or closed by the application. The
9189 HS v2 is doing that already so now we have the same behavior for
9190 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
9192 o Minor bugfixes (restart-in-process, boostrap):
9193 - Add missing resets of bootstrap tracking state when shutting down
9194 (regression caused by ticket 27169). Fixes bug 28524; bugfix
9197 o Minor bugfixes (testing):
9198 - Use a separate DataDirectory for the test_rebind script.
9199 Previously, this script would run using the default DataDirectory,
9200 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
9201 Patch from Taylor R Campbell.
9202 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
9203 bugfix on 0.3.0.1-alpha.
9205 o Minor bugfixes (Windows):
9206 - Correctly identify Windows 8.1, Windows 10, and Windows Server
9207 2008 and later from their NT versions. Fixes bug 28096; bugfix on
9208 0.2.2.34; reported by Keifer Bly.
9209 - On recent Windows versions, the GetVersionEx() function may report
9210 an earlier Windows version than the running OS. To avoid user
9211 confusion, add "[or later]" to Tor's version string on affected
9212 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
9214 - Remove Windows versions that were never supported by the
9215 GetVersionEx() function. Stop duplicating the latest Windows
9216 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
9217 reported by Keifer Bly.
9220 - Increase logging and tag all log entries with timestamps in
9221 test_rebind.py. Provides diagnostics for issue 28229.
9223 o Code simplification and refactoring (shared random, dirauth):
9224 - Change many tor_assert() to use BUG() instead. The idea is to not
9225 crash a dirauth but rather scream loudly with a stacktrace and let
9226 it continue run. The shared random subsystem is very resilient and
9227 if anything wrong happens with it, at worst a non coherent value
9228 will be put in the vote and discarded by the other authorities.
9229 Closes ticket 19566.
9231 o Documentation (onion services):
9232 - Document in the man page that changing ClientOnionAuthDir value or
9233 adding a new file in the directory will not work at runtime upon
9234 sending a HUP if Sandbox 1. Closes ticket 28128.
9235 - Note in the man page that the only real way to fully revoke an
9236 onion service v3 client authorization is by restarting the tor
9237 process. Closes ticket 28275.
9240 Changes in version 0.3.5.5-alpha - 2018-11-16
9241 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
9242 including several that we hope to backport to older release series in
9245 o Major bugfixes (OpenSSL, portability):
9246 - Fix our usage of named groups when running as a TLS 1.3 client in
9247 OpenSSL 1.1.1. Previously, we only initialized EC groups when
9248 running as a relay, which caused clients to fail to negotiate TLS
9249 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
9252 o Minor features (geoip):
9253 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
9254 Country database. Closes ticket 28395.
9256 o Minor bugfixes (compilation):
9257 - Initialize a variable unconditionally in aes_new_cipher(), since
9258 some compilers cannot tell that we always initialize it before
9259 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
9261 o Minor bugfixes (connection, relay):
9262 - Avoid a logging a BUG() stacktrace when closing connection held
9263 open because the write side is rate limited but not the read side.
9264 Now, the connection read side is simply shut down until Tor is
9265 able to flush the connection and close it. Fixes bug 27750; bugfix
9268 o Minor bugfixes (continuous integration, Windows):
9269 - Manually configure the zstd compiler options, when building using
9270 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
9271 not come with a pkg-config file. Fixes bug 28454; bugfix
9273 - Stop using an external OpenSSL install, and stop installing MSYS2
9274 packages, when building using mingw on Appveyor Windows CI. Fixes
9275 bug 28399; bugfix on 0.3.4.1-alpha.
9277 o Minor bugfixes (documentation):
9278 - Make Doxygen work again after the code movement in the 0.3.5
9279 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
9281 o Minor bugfixes (Linux seccomp2 sandbox):
9282 - Permit the "shutdown()" system call, which is apparently used by
9283 OpenSSL under some circumstances. Fixes bug 28183; bugfix
9286 o Minor bugfixes (logging):
9287 - Stop talking about the Named flag in log messages. Clients have
9288 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
9291 o Minor bugfixes (memory leaks):
9292 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
9293 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
9295 o Minor bugfixes (onion services):
9296 - On an intro point for a version 3 onion service, stop closing
9297 introduction circuits on an NACK. This lets the client decide
9298 whether to reuse the circuit or discard it. Previously, we closed
9299 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
9300 0.3.2.1-alpha. Patch by Neel Chaunan.
9301 - When replacing a descriptor in the client cache, make sure to
9302 close all client introduction circuits for the old descriptor, so
9303 we don't end up with unusable leftover circuits. Fixes bug 27471;
9304 bugfix on 0.3.2.1-alpha.
9307 Changes in version 0.3.5.4-alpha - 2018-11-08
9308 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
9309 improves our continuous integration support. It continues our attempts
9310 to stabilize this alpha branch and build it into a foundation for an
9311 acceptable long-term-support release.
9313 o Major bugfixes (compilation, rust):
9314 - Rust tests can now build and run successfully with the
9315 --enable-fragile-hardening option enabled. Doing this currently
9316 requires the rust beta channel; it will be possible with stable
9317 rust once Rust version 1.31 is released. Patch from Alex Crichton.
9318 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
9320 o Major bugfixes (embedding, main loop):
9321 - When DisableNetwork becomes set, actually disable periodic events
9322 that are already enabled. (Previously, we would refrain from
9323 enabling new ones, but we would leave the old ones turned on.)
9324 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
9326 o Minor features (continuous integration):
9327 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
9329 - Add new CI job to Travis configuration to run stem-based
9330 integration tests. Closes ticket 27913.
9332 o Minor features (Windows, continuous integration):
9333 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
9334 Appveyor's CI. Closes ticket 28318.
9336 o Minor bugfixes (C correctness, also in 0.3.4.9):
9337 - Avoid undefined behavior in an end-of-string check when parsing
9338 the BEGIN line in a directory object. Fixes bug 28202; bugfix
9341 o Minor bugfixes (compilation):
9342 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
9343 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
9345 o Minor bugfixes (compilation, OpenSolaris):
9346 - Fix compilation on OpenSolaris and its descendants by adding a
9347 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
9350 o Minor bugfixes (configuration):
9351 - Refuse to start with relative file paths and RunAsDaemon set
9352 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
9355 o Minor bugfixes (directory authority, also in 0.3.4.9):
9356 - Log additional info when we get a relay that shares an ed25519 ID
9357 with a different relay, instead of a BUG() warning with a
9358 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
9360 o Minor bugfixes (onion service v3):
9361 - Build the service descriptor's signing key certificate before
9362 uploading, so we always have a fresh one: leaving no chances for
9363 it to expire service side. Fixes bug 27838; bugfix
9366 o Minor bugfixes (onion service v3, client authorization):
9367 - Fix an assert() when adding a client authorization for the first
9368 time and then sending a HUP signal to the service. Before that,
9369 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
9371 o Minor bugfixes (onion services):
9372 - Unless we have explicitly set HiddenServiceVersion, detect the
9373 onion service version and then look for invalid options.
9374 Previously, we did the reverse, but that broke existing configs
9375 which were pointed to a v2 service and had options like
9376 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
9377 0.3.5.1-alpha. Patch by Neel Chauhan.
9379 o Minor bugfixes (portability):
9380 - Make the OPE code (which is used for v3 onion services) run
9381 correctly on big-endian platforms. Fixes bug 28115; bugfix
9384 o Minor bugfixes (protover, rust):
9385 - Reject extra commas in version strings. Fixes bug 27197; bugfix
9388 o Minor bugfixes (relay shutdown, systemd):
9389 - Notify systemd of ShutdownWaitLength so it can be set to longer
9390 than systemd's TimeoutStopSec. In Tor's systemd service file, set
9391 TimeoutSec to 60 seconds to allow Tor some time to shut down.
9392 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
9394 o Minor bugfixes (rust, also in 0.3.4.9):
9395 - Fix a potential null dereference in protover_all_supported(). Add
9396 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
9397 - Return a string that can be safely freed by C code, not one
9398 created by the rust allocator, in protover_all_supported(). Fixes
9399 bug 27740; bugfix on 0.3.3.1-alpha.
9401 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
9402 - Fix an API mismatch in the rust implementation of
9403 protover_compute_vote(). This bug could have caused crashes on any
9404 directory authorities running Tor with Rust (which we do not yet
9405 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
9407 o Minor bugfixes (testing):
9408 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
9409 27968; bugfix on 0.3.5.1-alpha.
9411 o Minor bugfixes (testing, also in 0.3.4.9):
9412 - Treat backtrace test failures as expected on BSD-derived systems
9413 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
9414 (FreeBSD failures have been treated as expected since 18204 in
9415 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
9417 o Documentation (onion service manpage):
9418 - Improve HSv3 client authorization by making some options more
9419 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
9422 Changes in version 0.3.4.9 - 2018-11-02
9423 Tor 0.3.4.9 is the second stable release in its series; it backports
9424 numerous fixes, including a fix for a bandwidth management bug that
9425 was causing memory exhaustion on relays. Anyone running an earlier
9426 version of Tor 0.3.4.9 should upgrade.
9428 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
9429 - Fix compilation on ARM (and other less-used CPUs) when compiling
9430 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9432 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
9433 - Make sure Tor bootstraps and works properly if only the
9434 ControlPort is set. Prior to this fix, Tor would only bootstrap
9435 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9436 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9438 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
9439 - When our write bandwidth limit is exhausted, stop writing on the
9440 connection. Previously, we had a typo in the code that would make
9441 us stop reading instead, leading to relay connections being stuck
9442 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9445 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
9446 - Fix a use-after-free error that could be caused by passing Tor an
9447 impossible set of options that would fail during options_act().
9448 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9450 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
9451 - Don't do a distcheck with --disable-module-dirauth in Travis.
9452 Implements ticket 27252.
9453 - Only run one online rust build in Travis, to reduce network
9454 errors. Skip offline rust builds on Travis for Linux gcc, because
9455 they're redundant. Implements ticket 27252.
9456 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9457 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9458 Linux with default settings, because all the non-default builds
9459 use gcc on Linux. Implements ticket 27252.
9461 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
9462 - Use the Travis Homebrew addon to install packages on macOS during
9463 Travis CI. The package list is the same, but the Homebrew addon
9464 does not do a `brew update` by default. Implements ticket 27738.
9466 o Minor features (geoip):
9467 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9468 Country database. Closes ticket 27991.
9470 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
9471 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9472 difference algorithm for 32-bit Apple platforms. Previously, it
9473 would overflow when calculating the difference between two times
9474 more than 47 days apart. Fixes part of bug 27139; bugfix
9476 - Improve the precision of our 32-bit millisecond difference
9477 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9478 bugfix on 0.3.4.1-alpha.
9479 - Relax the tolerance on the mainloop/update_time_jumps test when
9480 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9483 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
9484 - Avoid undefined behavior in an end-of-string check when parsing
9485 the BEGIN line in a directory object. Fixes bug 28202; bugfix
9488 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
9489 - Only install the necessary mingw packages during our appveyor
9490 builds. This change makes the build a little faster, and prevents
9491 a conflict with a preinstalled mingw openssl that appveyor now
9492 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
9494 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
9495 - Rewrite our assertion macros so that they no longer suppress the
9496 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9498 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
9499 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9500 27464; bugfix on 0.3.4.1-alpha.
9502 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
9503 - Log additional info when we get a relay that shares an ed25519 ID
9504 with a different relay, instead making a BUG() warning. Fixes bug
9505 27800; bugfix on 0.3.2.1-alpha.
9507 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
9508 - Avoid a double-close when shutting down a stalled directory
9509 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9511 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
9512 - Fix a bug warning when closing an HTTP tunnel connection due to an
9513 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9516 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
9517 - Ensure circuitmux queues are empty before scheduling or sending
9518 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9520 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
9521 - When the onion service directory can't be created or has the wrong
9522 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9525 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
9526 - Close all SOCKS request (for the same .onion) if the newly fetched
9527 descriptor is unusable. Before that, we would close only the first
9528 one leaving the other hanging and let to time out by themselves.
9529 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9531 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
9532 - When selecting a v3 rendezvous point, don't only look at the
9533 protover, but also check whether the curve25519 onion key is
9534 present. This way we avoid picking a relay that supports the v3
9535 rendezvous but for which we don't have the microdescriptor. Fixes
9536 bug 27797; bugfix on 0.3.2.1-alpha.
9538 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
9539 - Reject protocol names containing bytes other than alphanumeric
9540 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9543 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
9544 - Compute protover votes correctly in the rust version of the
9545 protover code. Previously, the protover rewrite in 24031 allowed
9546 repeated votes from the same voter for the same protocol version
9547 to be counted multiple times in protover_compute_vote(). Fixes bug
9548 27649; bugfix on 0.3.3.5-rc.
9549 - Reject protover names that contain invalid characters. Fixes bug
9550 27687; bugfix on 0.3.3.1-alpha.
9552 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
9553 - protover_all_supported() would attempt to allocate up to 16GB on
9554 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9555 bugfix on 0.3.3.5-rc.
9557 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
9558 - Fix an API mismatch in the rust implementation of
9559 protover_compute_vote(). This bug could have caused crashes on any
9560 directory authorities running Tor with Rust (which we do not yet
9561 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
9563 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
9564 - Fix a potential null dereference in protover_all_supported(). Add
9565 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
9566 - Return a string that can be safely freed by C code, not one
9567 created by the rust allocator, in protover_all_supported(). Fixes
9568 bug 27740; bugfix on 0.3.3.1-alpha.
9570 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
9571 - If a unit test running in a subprocess exits abnormally or with a
9572 nonzero status code, treat the test as having failed, even if the
9573 test reported success. Without this fix, memory leaks don't cause
9574 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9575 bugfix on 0.2.2.4-alpha.
9577 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
9578 - Make the hs_service tests use the same time source when creating
9579 the introduction point and when testing it. Now tests work better
9580 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9583 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
9584 - Treat backtrace test failures as expected on BSD-derived systems
9585 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
9586 (FreeBSD failures have been treated as expected since 18204 in
9587 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
9590 Changes in version 0.3.5.3-alpha - 2018-10-17
9591 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
9592 versions. One important fix for relays addresses a problem with rate-
9593 limiting code from back in 0.3.4.x: If the fix works out, we'll be
9594 backporting it soon. This release is still an alpha, but we hope it's
9595 getting closer and closer to stability.
9597 o Major features (onion services):
9598 - Version 3 onion services can now use the per-service
9599 HiddenServiceExportCircuitID option to differentiate client
9600 circuits. It communicates with the service by using the HAProxy
9601 protocol to assign virtual IP addresses to inbound client
9602 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
9604 o Major bugfixes (compilation):
9605 - Fix compilation on ARM (and other less-used CPUs) when compiling
9606 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9608 o Major bugfixes (initialization, crash):
9609 - Fix an assertion crash that would stop Tor from starting up if it
9610 tried to activate a periodic event too early. Fixes bug 27861;
9611 bugfix on 0.3.5.1-alpha.
9613 o Major bugfixes (mainloop, bootstrap):
9614 - Make sure Tor bootstraps and works properly if only the
9615 ControlPort is set. Prior to this fix, Tor would only bootstrap
9616 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9617 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9619 o Major bugfixes (relay):
9620 - When our write bandwidth limit is exhausted, stop writing on the
9621 connection. Previously, we had a typo in the code that would make
9622 us stop reading instead, leading to relay connections being stuck
9623 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9626 o Minor features (continuous integration):
9627 - Use the Travis Homebrew addon to install packages on macOS during
9628 Travis CI. The package list is the same, but the Homebrew addon
9629 does not do a `brew update` by default. Implements ticket 27738.
9630 - Report what program produced the mysterious core file that we
9631 occasionally see on Travis CI during make distcheck. Closes
9634 o Minor features (geoip):
9635 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9636 Country database. Closes ticket 27991.
9638 o Minor bugfixes (code safety):
9639 - Rewrite our assertion macros so that they no longer suppress the
9640 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9643 o Minor bugfixes (compilation):
9644 - Compile the ed25519-donna code with a correct declaration of
9645 crypto_strongest_rand(). Previously, we built it with one type,
9646 but linked it against another in the unit tests, which caused
9647 compilation failures with LTO enabled. This could have caused
9648 other undefined behavior in the tests. Fixes bug 27728; bugfix
9651 o Minor bugfixes (compilation, netbsd):
9652 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
9655 o Minor bugfixes (continuous integration, appveyor):
9656 - Install only the necessary mingw packages during our appveyor
9657 builds. This change makes the build a little faster, and prevents
9658 a conflict with a preinstalled mingw openssl that appveyor now
9659 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
9661 o Minor bugfixes (directory permissions):
9662 - When a user requests a group-readable DataDirectory, give it to
9663 them. Previously, when the DataDirectory and the CacheDirectory
9664 were the same, the default setting (0) for
9665 CacheDirectoryGroupReadable would override the setting for
9666 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
9669 o Minor bugfixes (memory leaks):
9670 - Fix a small memory leak when calling Tor with --dump-config. Fixes
9671 bug 27893; bugfix on 0.3.2.1-alpha.
9673 o Minor bugfixes (networking):
9674 - In retry_listeners_ports(), make sure that we're removing a member
9675 of old_conns smartlist at most once. Fixes bug 27808; bugfix
9677 - Refrain from attempting socket rebinding when old and new
9678 listeners are in different address families. Fixes bug 27928;
9679 bugfix on 0.3.5.1-alpha.
9681 o Minor bugfixes (onion service v3):
9682 - Stop dumping a stack trace when trying to connect to an intro
9683 point without having a descriptor for it. Fixes bug 27774; bugfix
9685 - Don't warn so loudly when Tor is unable to decode an onion
9686 descriptor. This can now happen as a normal use case if a client
9687 gets a descriptor with client authorization but the client is not
9688 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
9689 - When selecting a v3 rendezvous point, don't only look at the
9690 protover, but also check whether the curve25519 onion key is
9691 present. This way we avoid picking a relay that supports the v3
9692 rendezvous but for which we don't have the microdescriptor. Fixes
9693 bug 27797; bugfix on 0.3.2.1-alpha.
9695 o Minor bugfixes (protover):
9696 - Reject protocol names containing bytes other than alphanumeric
9697 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9700 o Minor bugfixes (testing):
9701 - Make the hs_service tests use the same time source when creating
9702 the introduction point and when testing it. Now tests work better
9703 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9705 - In test_rebind.py, check if the Python version is in the supported
9706 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
9708 o Code simplification and refactoring:
9709 - Divide more large Tor source files -- especially ones that span
9710 multiple areas of functionality -- into smaller parts, including
9711 onion.c and main.c. Closes ticket 26747.
9712 - Divide the "routerparse.c" module into separate modules for each
9713 group of parsed objects. Closes ticket 27924.
9714 - Move protover_rust.c to the same place protover.c was moved to.
9715 Closes ticket 27814.
9716 - Split directory.c into separate pieces for client, server, and
9717 common functionality. Closes ticket 26744.
9718 - Split the non-statistics-related parts from the rephist.c and
9719 geoip.c modules. Closes ticket 27892.
9720 - Split the router.c file into relay-only and shared components, to
9721 help with future modularization. Closes ticket 27864.
9724 - In the tor-resolve(1) manpage, fix the reference to socks-
9725 extensions.txt by adding a web URL. Resolves ticket 27853.
9726 - Mention that we require Python to be 2.7 or newer for some
9727 integration tests that we ship with Tor. Resolves ticket 27677.
9730 Changes in version 0.3.5.2-alpha - 2018-09-21
9731 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
9732 that made Tor think it had run out of sockets. Anybody running a relay
9733 or an onion service on 0.3.5.1-alpha should upgrade.
9735 o Major bugfixes (relay bandwidth statistics):
9736 - When we close relayed circuits, report the data in the circuit
9737 queues as being written in our relay bandwidth stats. This
9738 mitigates guard discovery and other attacks that close circuits
9739 for the explicit purpose of noticing this discrepancy in
9740 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
9742 o Major bugfixes (socket accounting):
9743 - In our socket accounting code, count a socket as closed even when
9744 it is closed indirectly by the TLS layer. Previously, we would
9745 count these sockets as still in use, and incorrectly believe that
9746 we had run out of sockets. Fixes bug 27795; bugfix
9749 o Minor bugfixes (32-bit OSX and iOS, timing):
9750 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9751 difference algorithm for 32-bit Apple platforms. Previously, it
9752 would overflow when calculating the difference between two times
9753 more than 47 days apart. Fixes part of bug 27139; bugfix
9755 - Improve the precision of our 32-bit millisecond difference
9756 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9757 bugfix on 0.3.4.1-alpha.
9758 - Relax the tolerance on the mainloop/update_time_jumps test when
9759 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9762 o Minor bugfixes (onion service v3):
9763 - Close all SOCKS request (for the same .onion) if the newly fetched
9764 descriptor is unusable. Before that, we would close only the first
9765 one leaving the other hanging and let to time out by themselves.
9766 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9768 o Minor bugfixes (memory leak):
9769 - Fix an unlikely memory leak when trying to read a private key from
9770 a ridiculously large file. Fixes bug 27764; bugfix on
9771 0.3.5.1-alpha. This is CID 1439488.
9773 o Minor bugfixes (NSS):
9774 - Correctly detect failure to open a dummy TCP socket when stealing
9775 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
9778 o Minor bugfixes (rust):
9779 - protover_all_supported() would attempt to allocate up to 16GB on
9780 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9781 bugfix on 0.3.3.5-rc.
9783 o Minor bugfixes (testing):
9784 - Revise the "conditionvar_timeout" test so that it succeeds even on
9785 heavily loaded systems where the test threads are not scheduled
9786 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
9788 o Code simplification and refactoring:
9789 - Divide the routerlist.c and dirserv.c modules into smaller parts.
9790 Closes ticket 27799.
9793 Changes in version 0.3.5.1-alpha - 2018-09-18
9794 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
9795 client authorization for modern (v3) onion services, improves
9796 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
9797 support for NSS in place of OpenSSL, and much more.
9799 o Major features (onion services, UI change):
9800 - For a newly created onion service, the default version is now 3.
9801 Tor still supports existing version 2 services, but the operator
9802 now needs to set "HiddenServiceVersion 2" in order to create a new
9803 version 2 service. For existing services, Tor now learns the
9804 version by reading the key file. Closes ticket 27215.
9806 o Major features (relay, UI change):
9807 - Relays no longer run as exits by default. If the "ExitRelay"
9808 option is auto (or unset), and no exit policy is specified with
9809 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
9810 Previously in this case, we allowed exit traffic and logged a
9811 warning message. Closes ticket 21530. Patch by Neel Chauhan.
9812 - Tor now validates that the ContactInfo config option is valid UTF-
9813 8 when parsing torrc. Closes ticket 27428.
9815 o Major features (bootstrap):
9816 - Don't report directory progress until after a connection to a
9817 relay or bridge has succeeded. Previously, we'd report 80%
9818 progress based on cached directory information when we couldn't
9819 even connect to the network. Closes ticket 27169.
9821 o Major features (new code layout):
9822 - Nearly all of Tor's source code has been moved around into more
9823 logical places. The "common" directory is now divided into a set
9824 of libraries in "lib", and files in the "or" directory have been
9825 split into "core" (logic absolutely needed for onion routing),
9826 "feature" (independent modules in Tor), and "app" (to configure
9827 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
9828 more information. Closes ticket 26481.
9830 This refactoring is not complete: although the libraries have been
9831 refactored to be acyclic, the main body of Tor is still too
9832 interconnected. We will attempt to improve this in the future.
9834 o Major features (onion services v3):
9835 - Implement onion service client authorization at the descriptor
9836 level: only authorized clients can decrypt a service's descriptor
9837 to find out how to contact it. A new torrc option was added to
9838 control this client side: ClientOnionAuthDir <path>. On the
9839 service side, if the "authorized_clients/" directory exists in the
9840 onion service directory path, client configurations are read from
9841 the files within. See the manpage for more details. Closes ticket
9842 27547. Patch done by Suphanat Chunhapanya (haxxpop).
9843 - Improve revision counter generation in next-gen onion services.
9844 Onion services can now scale by hosting multiple instances on
9845 different hosts without synchronization between them, which was
9846 previously impossible because descriptors would get rejected by
9847 HSDirs. Addresses ticket 25552.
9849 o Major features (portability, cryptography, experimental, TLS):
9850 - Tor now has the option to compile with the NSS library instead of
9851 OpenSSL. This feature is experimental, and we expect that bugs may
9852 remain. It is mainly intended for environments where Tor's
9853 performance is not CPU-bound, and where NSS is already known to be
9854 installed. To try it out, configure Tor with the --enable-nss
9855 flag. Closes tickets 26631, 26815, and 26816.
9857 If you are experimenting with this option and using an old cached
9858 consensus, Tor may fail to start. To solve this, delete your
9859 "cached-consensus" and "cached-microdesc-consensus" files,
9860 (if present), and restart Tor.
9862 o Major bugfixes (directory authority):
9863 - Actually check that the address we get from DirAuthority
9864 configuration line is valid IPv4. Explicitly disallow DirAuthority
9865 address to be a DNS hostname. Fixes bug 26488; bugfix
9868 o Major bugfixes (restart-in-process):
9869 - Fix a use-after-free error that could be caused by passing Tor an
9870 impossible set of options that would fail during options_act().
9871 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9873 o Minor features (admin tools):
9874 - Add a new --key-expiration option to print the expiration date of
9875 the signing cert in an ed25519_signing_cert file. Resolves
9878 o Minor features (build):
9879 - If you pass the "--enable-pic" option to configure, Tor will try
9880 to tell the compiler to build position-independent code suitable
9881 to link into a dynamic library. (The default remains -fPIE, for
9882 code suitable for a relocatable executable.) Closes ticket 23846.
9884 o Minor features (code correctness, testing):
9885 - Tor's build process now includes a "check-includes" make target to
9886 verify that no module of Tor relies on any headers from a higher-
9887 level module. We hope to use this feature over time to help
9888 refactor our codebase. Closes ticket 26447.
9890 o Minor features (code layout):
9891 - We have a new "lowest-level" error-handling API for use by code
9892 invoked from within the logging module. With this interface, the
9893 logging code is no longer at risk of calling into itself if a
9894 failure occurs while it is trying to log something. Closes
9897 o Minor features (compilation):
9898 - Tor's configure script now supports a --with-malloc= option to
9899 select your malloc implementation. Supported options are
9900 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
9901 default). Addresses part of ticket 20424. Based on a patch from
9904 o Minor features (config):
9905 - The "auto" keyword in torrc is now case-insensitive. Closes
9908 o Minor features (continuous integration):
9909 - Don't do a distcheck with --disable-module-dirauth in Travis.
9910 Implements ticket 27252.
9911 - Install libcap-dev and libseccomp2-dev so these optional
9912 dependencies get tested on Travis CI. Closes ticket 26560.
9913 - Only run one online rust build in Travis, to reduce network
9914 errors. Skip offline rust builds on Travis for Linux gcc, because
9915 they're redundant. Implements ticket 27252.
9916 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9917 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9918 Linux with default settings, because all the non-default builds
9919 use gcc on Linux. Implements ticket 27252.
9921 o Minor features (controller):
9922 - Emit CIRC_BW events as soon as we detect that we processed an
9923 invalid or otherwise dropped cell on a circuit. This allows
9924 vanguards and other controllers to react more quickly to dropped
9925 cells. Closes ticket 27678.
9926 - For purposes of CIRC_BW-based dropped cell detection, track half-
9927 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
9928 bias check cells to arrive without counting it as dropped until
9929 either the END arrives, or the windows are empty. Closes
9931 - Implement a 'GETINFO md/all' controller command to enable getting
9932 all known microdescriptors. Closes ticket 8323.
9933 - The GETINFO command now support an "uptime" argument, to return
9934 Tor's uptime in seconds. Closes ticket 25132.
9936 o Minor features (denial-of-service avoidance):
9937 - Make our OOM handler aware of the DNS cache so that it doesn't
9938 fill up the memory. This check is important for our DoS mitigation
9939 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
9941 o Minor features (development):
9942 - Tor's makefile now supports running the "clippy" Rust style tool
9943 on our Rust code. Closes ticket 22156.
9945 o Minor features (directory authority):
9946 - There is no longer an artificial upper limit on the length of
9947 bandwidth lines. Closes ticket 26223.
9948 - When a bandwidth file is used to obtain the bandwidth measurements,
9949 include this bandwidth file headers in the votes. Closes
9951 - Improved support for networks with only a single authority or a
9952 single fallback directory. Patch from Gabriel Somlo. Closes
9955 o Minor features (embedding API):
9956 - The Tor controller API now supports a function to launch Tor with
9957 a preconstructed owning controller FD, so that embedding
9958 applications don't need to manage controller ports and
9959 authentication. Closes ticket 24204.
9960 - The Tor controller API now has a function that returns the name
9961 and version of the backend implementing the API. Closes
9964 o Minor features (geoip):
9965 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
9966 Country database. Closes ticket 27631.
9968 o Minor features (memory management):
9969 - Get Libevent to use the same memory allocator as Tor, by calling
9970 event_set_mem_functions() during initialization. Resolves
9973 o Minor features (memory usage):
9974 - When not using them, store legacy TAP public onion keys in DER-
9975 encoded format, rather than as expanded public keys. This should
9976 save several megabytes on typical clients. Closes ticket 27246.
9978 o Minor features (OpenSSL):
9979 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
9980 than our own. Resolves ticket 19979.
9982 o Minor features (Rust, code quality):
9983 - Improve rust code quality in the rust protover implementation by
9984 making it more idiomatic. Includes changing an internal API to
9985 take &str instead of &String. Closes ticket 26492.
9987 o Minor features (testing):
9988 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
9989 chutney. Implements ticket 27211.
9991 o Minor features (tor-resolve):
9992 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
9993 Side-effect of the refactoring for ticket 26526.
9995 o Minor features (UI):
9996 - Log each included configuration file or directory as we read it,
9997 to provide more visibility about where Tor is reading from. Patch
9998 from Unto Sten; closes ticket 27186.
9999 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
10000 Closes ticket 26703.
10002 o Minor bugfixes (bootstrap):
10003 - Try harder to get descriptors in non-exit test networks, by using
10004 the mid weight for the third hop when there are no exits. Fixes
10005 bug 27237; bugfix on 0.2.6.2-alpha.
10007 o Minor bugfixes (C correctness):
10008 - Avoid casting smartlist index to int implicitly, as it may trigger
10009 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
10010 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
10011 - Use time_t for all values in
10012 predicted_ports_prediction_time_remaining(). Rework the code that
10013 computes difference between durations/timestamps. Fixes bug 27165;
10014 bugfix on 0.3.1.1-alpha.
10016 o Minor bugfixes (client, memory usage):
10017 - When not running as a directory cache, there is no need to store
10018 the text of the current consensus networkstatus in RAM.
10019 Previously, however, clients would store it anyway, at a cost of
10020 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
10023 o Minor bugfixes (client, reachableaddresses):
10024 - Instead of adding a "reject *:*" line to ReachableAddresses when
10025 loading the configuration, add one to the policy after parsing it
10026 in parse_reachable_addresses(). This prevents extra "reject *.*"
10027 lines from accumulating on reloads. Fixes bug 20874; bugfix on
10028 0.1.1.5-alpha. Patch by Neel Chauhan.
10030 o Minor bugfixes (code quality):
10031 - Rename sandbox_getaddrinfo() and other functions to no longer
10032 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
10033 bugfix on 0.2.7.1-alpha.
10035 o Minor bugfixes (configuration, Onion Services):
10036 - In rend_service_parse_port_config(), disallow any input to remain
10037 after address-port pair was parsed. This will catch address and
10038 port being whitespace-separated by mistake of the user. Fixes bug
10039 27044; bugfix on 0.2.9.10.
10041 o Minor bugfixes (continuous integration):
10042 - Stop reinstalling identical packages in our Windows CI. Fixes bug
10043 27464; bugfix on 0.3.4.1-alpha.
10045 o Minor bugfixes (controller):
10046 - Consider all routerinfo errors other than "not a server" to be
10047 transient for the purpose of "GETINFO exit-policy/*" controller
10048 request. Print stacktrace in the unlikely case of failing to
10049 recompute routerinfo digest. Fixes bug 27034; bugfix
10052 o Minor bugfixes (directory connection shutdown):
10053 - Avoid a double-close when shutting down a stalled directory
10054 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
10056 o Minor bugfixes (HTTP tunnel):
10057 - Fix a bug warning when closing an HTTP tunnel connection due to an
10058 HTTP request we couldn't handle. Fixes bug 26470; bugfix
10061 o Minor bugfixes (ipv6):
10062 - In addrs_in_same_network_family(), we choose the subnet size based
10063 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
10064 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
10065 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
10067 o Minor bugfixes (logging):
10068 - As a precaution, do an early return from log_addr_has_changed() if
10069 Tor is running as client. Also, log a stack trace for debugging as
10070 this function should only be called when Tor runs as server. Fixes
10071 bug 26892; bugfix on 0.1.1.9-alpha.
10072 - Refrain from mentioning bug 21018 in the logs, as it is already
10073 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
10075 o Minor bugfixes (logging, documentation):
10076 - When SafeLogging is enabled, scrub IP address in
10077 channel_tls_process_netinfo_cell(). Also, add a note to manpage
10078 that scrubbing is not guaranteed on loglevels below Notice. Fixes
10079 bug 26882; bugfix on 0.2.4.10-alpha.
10081 o Minor bugfixes (netflow padding):
10082 - Ensure circuitmux queues are empty before scheduling or sending
10083 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
10085 o Minor bugfixes (onion service v2):
10086 - Log at level "info", not "warning", in the case that we do not
10087 have a consensus when a .onion request comes in. This can happen
10088 normally while bootstrapping. Fixes bug 27040; bugfix
10091 o Minor bugfixes (onion service v3):
10092 - When the onion service directory can't be created or has the wrong
10093 permissions, do not log a stack trace. Fixes bug 27335; bugfix
10096 o Minor bugfixes (OS compatibility):
10097 - Properly handle configuration changes that move a listener to/from
10098 wildcard IP address. If the first attempt to bind a socket fails,
10099 close the old listener and try binding the socket again. Fixes bug
10100 17873; bugfix on 0.0.8pre-1.
10102 o Minor bugfixes (performance)::
10103 - Rework node_is_a_configured_bridge() to no longer call
10104 node_get_all_orports(), which was performing too many memory
10105 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
10107 o Minor bugfixes (relay statistics):
10108 - Update relay descriptor on bandwidth changes only when the uptime
10109 is smaller than 24h, in order to reduce the efficiency of guard
10110 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
10112 o Minor bugfixes (relays):
10113 - Consider the fact that we'll be making direct connections to our
10114 entry and guard nodes when computing the fraction of nodes that
10115 have their descriptors. Also, if we are using bridges and there is
10116 at least one bridge with a full descriptor, treat the fraction of
10117 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
10118 Patch by Neel Chauhan.
10119 - Update the message logged on relays when DirCache is disabled.
10120 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
10121 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
10123 o Minor bugfixes (rust, protover):
10124 - Compute protover votes correctly in the rust version of the
10125 protover code. Previously, the protover rewrite in 24031 allowed
10126 repeated votes from the same voter for the same protocol version
10127 to be counted multiple times in protover_compute_vote(). Fixes bug
10128 27649; bugfix on 0.3.3.5-rc.
10129 - Reject protover names that contain invalid characters. Fixes bug
10130 27687; bugfix on 0.3.3.1-alpha.
10132 o Minor bugfixes (testing):
10133 - Fix two unit tests to work when HOME environment variable is not
10134 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
10135 - If a unit test running in a subprocess exits abnormally or with a
10136 nonzero status code, treat the test as having failed, even if the
10137 test reported success. Without this fix, memory leaks don't cause
10138 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
10139 bugfix on 0.2.2.4-alpha.
10140 - When logging a version mismatch in our openssl_version tests,
10141 report the actual offending version strings. Fixes bug 26152;
10142 bugfix on 0.2.9.1-alpha.
10143 - Fix forking tests on Windows when there is a space somewhere in
10144 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
10146 o Code simplification and refactoring:
10147 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
10148 longer needed. Closes ticket 26502.
10149 - Include paths to header files within Tor are now qualified by
10150 directory within the top-level src directory.
10151 - Many structures have been removed from the centralized "or.h"
10152 header, and moved into their own headers. This will allow us to
10153 reduce the number of places in the code that rely on each
10154 structure's contents and layout. Closes ticket 26383.
10155 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
10156 - Remove GetAdaptersAddresses_fn_t. The code that used it was
10157 removed as part of the 26481 refactor. Closes ticket 27467.
10158 - Rework Tor SOCKS server code to use Trunnel and benefit from
10159 autogenerated functions for parsing and generating SOCKS wire
10160 format. New implementation is cleaner, more maintainable and
10161 should be less prone to heartbleed-style vulnerabilities.
10162 Implements a significant fraction of ticket 3569.
10163 - Split sampled_guards_update_from_consensus() and
10164 select_entry_guard_for_circuit() into subfunctions. In
10165 entry_guards_update_primary() unite three smartlist enumerations
10166 into one and move smartlist comparison code out of the function.
10167 Closes ticket 21349.
10168 - Tor now assumes that you have standards-conformant stdint.h and
10169 inttypes.h headers when compiling. Closes ticket 26626.
10170 - Unify our bloom filter logic. Previously we had two copies of this
10171 code: one for routerlist filtering, and one for address set
10172 calculations. Closes ticket 26510.
10173 - Use the simpler strcmpstart() helper in
10174 rend_parse_v2_service_descriptor instead of strncmp(). Closes
10176 - Utility functions that can perform a DNS lookup are now wholly
10177 separated from those that can't, in separate headers and C
10178 modules. Closes ticket 26526.
10181 - Copy paragraph and URL to Tor's code of conduct document from
10182 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
10183 - Remove old instructions from INSTALL document. Closes ticket 26588.
10184 - Warn users that they should not include MyFamily line(s) in their
10185 torrc when running Tor bridge. Closes ticket 26908.
10187 o Removed features:
10188 - Tor no longer supports building with the dmalloc library. For
10189 debugging memory issues, we suggest using gperftools or msan
10190 instead. Closes ticket 26426.
10191 - Tor no longer attempts to run on Windows environments without the
10192 GetAdaptersAddresses() function. This function has existed since
10193 Windows XP, which is itself already older than we support.
10194 - Remove Tor2web functionality for version 2 onion services. The
10195 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
10196 (This feature was never shipped in vanilla Tor and it was only
10197 possible to use this feature by building the support at compile
10198 time. Tor2webMode is not implemented for version 3 onion services.)
10199 Closes ticket 26367.
10202 Changes in version 0.2.9.17 - 2018-09-10
10203 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
10205 o Minor features (compatibility, backport from 0.3.4.8):
10206 - Tell OpenSSL to maintain backward compatibility with previous
10207 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10208 ciphers are disabled by default. Closes ticket 27344.
10210 o Minor features (continuous integration, backport from 0.3.4.7-rc):
10211 - Enable macOS builds in our Travis CI configuration. Closes
10213 - Install libcap-dev and libseccomp2-dev so these optional
10214 dependencies get tested on Travis CI. Closes ticket 26560.
10215 - Run asciidoc during Travis CI. Implements ticket 27087.
10216 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10218 o Minor features (geoip):
10219 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10220 Country database. Closes ticket 27089.
10222 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
10223 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10224 tell the compiler not to include the system malloc implementation.
10225 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10227 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10228 - Silence a spurious compiler warning on the GetAdaptersAddresses
10229 function pointer cast. This issue is already fixed by 26481 in
10230 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10231 bugfix on 0.2.3.11-alpha.
10232 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10233 supported, and always fails. Some compilers warn about the
10234 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10237 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10238 - Don't link or search for pthreads when building for Windows, even
10239 if we are using build environment (like mingw) that provides a
10240 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10242 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10243 - Skip a pair of unreliable key generation tests on Windows, until
10244 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10245 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10247 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10248 - Pass the module flags to distcheck configure, and log the flags
10249 before running configure. (Backported to 0.2.9 and later as a
10250 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10252 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10253 - When a Travis build fails, and showing a log fails, keep trying to
10254 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10255 - When we use echo in Travis, don't pass a --flag as the first
10256 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10258 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10259 - When voting for recommended versions, make sure that all of the
10260 versions are well-formed and parsable. Fixes bug 26485; bugfix
10263 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10264 - Fix a bug in out sandboxing rules for the openat() syscall.
10265 Previously, no openat() call would be permitted, which would break
10266 filesystem operations on recent glibc versions. Fixes bug 25440;
10267 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10269 o Minor bugfixes (onion services, backport from 0.3.4.8):
10270 - Silence a spurious compiler warning in
10271 rend_client_send_introduction(). Fixes bug 27463; bugfix
10274 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10275 - Log a protocol warning when single onion services or Tor2web clients
10276 fail to authenticate direct connections to relays.
10277 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10279 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10280 - Disable core dumps in test_bt.sh, to avoid failures in "make
10281 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10283 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10284 - Before running make test-network-all, delete old logs and test
10285 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10288 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10289 - Our "tortls/cert_matches_key" unit test no longer relies on
10290 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10291 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10292 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10294 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10295 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10296 27185; bugfix on 0.2.2.2-alpha.
10299 Changes in version 0.3.2.12 - 2018-09-10
10300 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
10302 o Minor features (compatibility, backport from 0.3.4.8):
10303 - Tell OpenSSL to maintain backward compatibility with previous
10304 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10305 ciphers are disabled by default. Closes ticket 27344.
10307 o Minor features (continuous integration, backport from 0.3.4.7-rc):
10308 - Enable macOS builds in our Travis CI configuration. Closes
10310 - Install libcap-dev and libseccomp2-dev so these optional
10311 dependencies get tested on Travis CI. Closes ticket 26560.
10312 - Run asciidoc during Travis CI. Implements ticket 27087.
10313 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10315 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
10316 - Use cargo cache in our Travis CI configuration. Closes
10319 o Minor features (controller, backport from 0.3.4.6-rc):
10320 - The control port now exposes the list of HTTPTunnelPorts and
10321 ExtOrPorts via GETINFO net/listeners/httptunnel and
10322 net/listeners/extor respectively. Closes ticket 26647.
10324 o Minor features (directory authorities, backport from 0.3.4.7-rc):
10325 - Authorities no longer vote to make the subprotocol version
10326 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10327 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10329 o Minor features (geoip):
10330 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10331 Country database. Closes ticket 27089.
10333 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
10334 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10335 tell the compiler not to include the system malloc implementation.
10336 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10337 - Don't try to use a pragma to temporarily disable the
10338 -Wunused-const-variable warning if the compiler doesn't support
10339 it. Fixes bug 26785; bugfix on 0.3.2.11.
10341 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10342 - Silence a spurious compiler warning on the GetAdaptersAddresses
10343 function pointer cast. This issue is already fixed by 26481 in
10344 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10345 bugfix on 0.2.3.11-alpha.
10346 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10347 supported, and always fails. Some compilers warn about the
10348 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10351 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10352 - Don't link or search for pthreads when building for Windows, even
10353 if we are using build environment (like mingw) that provides a
10354 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10356 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10357 - Skip a pair of unreliable key generation tests on Windows, until
10358 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10359 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10361 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10362 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10363 - Pass the module flags to distcheck configure, and log the flags
10364 before running configure. (Backported to 0.2.9 and later as a
10365 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10367 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10368 - When a Travis build fails, and showing a log fails, keep trying to
10369 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10370 - When we use echo in Travis, don't pass a --flag as the first
10371 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10373 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10374 - When voting for recommended versions, make sure that all of the
10375 versions are well-formed and parsable. Fixes bug 26485; bugfix
10378 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10379 - Fix a bug in out sandboxing rules for the openat() syscall.
10380 Previously, no openat() call would be permitted, which would break
10381 filesystem operations on recent glibc versions. Fixes bug 25440;
10382 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10384 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
10385 - Improve the log message when connection initiators fail to
10386 authenticate direct connections to relays. Fixes bug 26927; bugfix
10389 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
10390 - Fix bug that causes services to not ever rotate their descriptors
10391 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10394 o Minor bugfixes (onion services, backport from 0.3.4.8):
10395 - Silence a spurious compiler warning in
10396 rend_client_send_introduction(). Fixes bug 27463; bugfix
10399 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
10400 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10402 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10403 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10404 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10405 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10407 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10408 - Log a protocol warning when single onion services or Tor2web clients
10409 fail to authenticate direct connections to relays.
10410 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10412 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10413 - Disable core dumps in test_bt.sh, to avoid failures in "make
10414 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10416 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10417 - When running make test-network-all, use the mixed+hs-v2 network.
10418 (A previous fix to chutney removed v3 onion services from the
10419 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10420 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10421 - Before running make test-network-all, delete old logs and test
10422 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10425 o Minor bugfixes (testing, openssl compatibility):
10426 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
10427 internals. Previously, it relied on unsupported OpenSSL behavior in
10428 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
10429 bugfix on 0.2.5.1-alpha.
10431 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10432 - Our "tortls/cert_matches_key" unit test no longer relies on
10433 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10434 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10435 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10437 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10438 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10439 27185; bugfix on 0.2.2.2-alpha.
10442 Changes in version 0.3.3.10 - 2018-09-10
10443 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
10445 o Minor features (bug workaround, backport from 0.3.4.7-rc):
10446 - Compile correctly on systems that provide the C11 stdatomic.h
10447 header, but where C11 atomic functions don't actually compile.
10448 Closes ticket 26779; workaround for Debian issue 903709.
10450 o Minor features (compatibility, backport from 0.3.4.8):
10451 - Tell OpenSSL to maintain backward compatibility with previous
10452 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10453 ciphers are disabled by default. Closes ticket 27344.
10455 o Minor features (continuous integration, backport from 0.3.4.7-rc):
10456 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10457 - Enable macOS builds in our Travis CI configuration. Closes
10459 - Install libcap-dev and libseccomp2-dev so these optional
10460 dependencies get tested on Travis CI. Closes ticket 26560.
10461 - Run asciidoc during Travis CI. Implements ticket 27087.
10462 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10464 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
10465 - Use cargo cache in our Travis CI configuration. Closes
10468 o Minor features (controller, backport from 0.3.4.6-rc):
10469 - The control port now exposes the list of HTTPTunnelPorts and
10470 ExtOrPorts via GETINFO net/listeners/httptunnel and
10471 net/listeners/extor respectively. Closes ticket 26647.
10473 o Minor features (directory authorities, backport from 0.3.4.7-rc):
10474 - Authorities no longer vote to make the subprotocol version
10475 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10476 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10478 o Minor features (geoip):
10479 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10480 Country database. Closes ticket 27089.
10482 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
10483 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10484 tell the compiler not to include the system malloc implementation.
10485 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10486 - Don't try to use a pragma to temporarily disable the
10487 -Wunused-const-variable warning if the compiler doesn't support
10488 it. Fixes bug 26785; bugfix on 0.3.2.11.
10490 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10491 - Silence a spurious compiler warning on the GetAdaptersAddresses
10492 function pointer cast. This issue is already fixed by 26481 in
10493 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10494 bugfix on 0.2.3.11-alpha.
10495 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10496 supported, and always fails. Some compilers warn about the
10497 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10500 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10501 - Don't link or search for pthreads when building for Windows, even
10502 if we are using build environment (like mingw) that provides a
10503 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10505 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10506 - Skip a pair of unreliable key generation tests on Windows, until
10507 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10508 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10510 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10511 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10512 - Pass the module flags to distcheck configure, and log the flags
10513 before running configure. (Backported to 0.2.9 and later as a
10514 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10516 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10517 - When a Travis build fails, and showing a log fails, keep trying to
10518 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10519 - When we use echo in Travis, don't pass a --flag as the first
10520 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10522 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10523 - When voting for recommended versions, make sure that all of the
10524 versions are well-formed and parsable. Fixes bug 26485; bugfix
10527 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
10528 - Always call tor_free_all() when leaving tor_run_main(). When we
10529 did not, restarting tor in-process would cause an assertion
10530 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10532 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10533 - Fix a bug in our sandboxing rules for the openat() syscall.
10534 Previously, no openat() call would be permitted, which would break
10535 filesystem operations on recent glibc versions. Fixes bug 25440;
10536 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10538 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
10539 - Improve the log message when connection initiators fail to
10540 authenticate direct connections to relays. Fixes bug 26927; bugfix
10543 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
10544 - Fix bug that causes services to not ever rotate their descriptors
10545 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10548 o Minor bugfixes (onion services, backport from 0.3.4.8):
10549 - Silence a spurious compiler warning in
10550 rend_client_send_introduction(). Fixes bug 27463; bugfix
10553 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
10554 - Work around two different bugs in the OS X 10.10 and later SDKs
10555 that would prevent us from successfully targeting earlier versions
10556 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10558 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
10559 - Fix compilation of the unit tests on GNU/Hurd, which does not
10560 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10563 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
10564 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10566 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10567 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10568 - Protover parsing was accepting the presence of whitespace in
10569 version strings, which the C implementation would choke on, e.g.
10570 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10571 - Protover parsing was ignoring a 2nd hyphen and everything after
10572 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10574 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10575 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10576 - cd to ${abs_top_builddir}/src/rust before running cargo in
10577 src/test/test_rust.sh. This makes the working directory consistent
10578 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10580 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10581 - Log a protocol warning when single onion services or Tor2web clients
10582 fail to authenticate direct connections to relays.
10583 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10585 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10586 - Disable core dumps in test_bt.sh, to avoid failures in "make
10587 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10589 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10590 - When running make test-network-all, use the mixed+hs-v2 network.
10591 (A previous fix to chutney removed v3 onion services from the
10592 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10593 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10594 - Before running make test-network-all, delete old logs and test
10595 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10598 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10599 - Our "tortls/cert_matches_key" unit test no longer relies on
10600 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10601 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10602 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10604 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
10605 - Stop sending ed25519 link specifiers in v3 onion service introduce
10606 cells and descriptors, when the rendezvous or introduction point
10607 doesn't support ed25519 link authentication. Fixes bug 26627;
10608 bugfix on 0.3.2.4-alpha.
10610 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10611 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10612 27185; bugfix on 0.2.2.2-alpha.
10615 Changes in version 0.3.4.8 - 2018-09-10
10616 Tor 0.3.4.8 is the first stable release in its series; it includes
10617 compilation and portability fixes.
10619 The Tor 0.3.4 series includes improvements for running Tor in
10620 low-power and embedded environments, which should help performance in
10621 general. We've begun work on better modularity, and included preliminary
10622 changes on the directory authority side to accommodate a new bandwidth
10623 measurement system. We've also integrated more continuous-integration
10624 systems into our development process, and made corresponding changes to
10625 Tor's testing infrastructure. Finally, we've continued to refine
10626 our anti-denial-of-service code.
10628 Below are the changes since 0.3.4.7-rc. For a complete list of changes
10629 since 0.3.3.9, see the ReleaseNotes file.
10631 o Minor features (compatibility):
10632 - Tell OpenSSL to maintain backward compatibility with previous
10633 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10634 ciphers are disabled by default. Closes ticket 27344.
10636 o Minor features (continuous integration):
10637 - Log the compiler path and version during Appveyor builds.
10638 Implements ticket 27449.
10639 - Show config.log and test-suite.log after failed Appveyor builds.
10640 Also upload the zipped full logs as a build artifact. Implements
10643 o Minor bugfixes (compilation):
10644 - Silence a spurious compiler warning on the GetAdaptersAddresses
10645 function pointer cast. This issue is already fixed by 26481 in
10646 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10647 bugfix on 0.2.3.11-alpha.
10648 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10649 supported, and always fails. Some compilers warn about the
10650 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10653 o Minor bugfixes (continuous integration):
10654 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
10655 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
10656 Executables compiled for 64-bit Windows with this version of gcc
10657 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
10658 27460; bugfix on 0.3.4.1-alpha.
10659 - When a Travis build fails, and showing a log fails, keep trying to
10660 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10661 - When we use echo in Travis, don't pass a --flag as the first
10662 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10664 o Minor bugfixes (onion services):
10665 - Silence a spurious compiler warning in
10666 rend_client_send_introduction(). Fixes bug 27463; bugfix
10669 o Minor bugfixes (testing, chutney):
10670 - When running make test-network-all, use the mixed+hs-v2 network.
10671 (A previous fix to chutney removed v3 onion services from the
10672 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10673 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10674 - Before running make test-network-all, delete old logs and test
10675 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10678 Changes in version 0.3.4.7-rc - 2018-08-24
10679 Tor 0.3.4.7-rc fixes several small compilation, portability, and
10680 correctness issues in previous versions of Tor. This version is a
10681 release candidate: if no serious bugs are found, we expect that the
10682 stable 0.3.4 release will be (almost) the same as this release.
10684 o Minor features (bug workaround):
10685 - Compile correctly on systems that provide the C11 stdatomic.h
10686 header, but where C11 atomic functions don't actually compile.
10687 Closes ticket 26779; workaround for Debian issue 903709.
10689 o Minor features (continuous integration):
10690 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10691 - Enable macOS builds in our Travis CI configuration. Closes
10693 - Install libcap-dev and libseccomp2-dev so these optional
10694 dependencies get tested on Travis CI. Closes ticket 26560.
10695 - Only post Appveyor IRC notifications when the build fails.
10696 Implements ticket 27275.
10697 - Run asciidoc during Travis CI. Implements ticket 27087.
10698 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10700 o Minor features (continuous integration, rust):
10701 - Use cargo cache in our Travis CI configuration. Closes
10704 o Minor features (directory authorities):
10705 - Authorities no longer vote to make the subprotocol version
10706 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10707 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10709 o Minor features (geoip):
10710 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10711 Country database. Closes ticket 27089.
10713 o Minor bugfixes (compilation, windows):
10714 - Don't link or search for pthreads when building for Windows, even
10715 if we are using build environment (like mingw) that provides a
10716 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10718 o Minor bugfixes (continuous integration):
10719 - Improve Appveyor CI IRC logging. Generate correct branches and
10720 URLs for pull requests and tags. Use unambiguous short commits.
10721 Fixes bug 26979; bugfix on master.
10722 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10723 - Pass the module flags to distcheck configure, and log the flags
10724 before running configure. (Backported to 0.2.9 and later as a
10725 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10727 o Minor bugfixes (in-process restart):
10728 - Always call tor_free_all() when leaving tor_run_main(). When we
10729 did not, restarting tor in-process would cause an assertion
10730 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10732 o Minor bugfixes (linux seccomp2 sandbox):
10733 - Fix a bug in out sandboxing rules for the openat() syscall.
10734 Previously, no openat() call would be permitted, which would break
10735 filesystem operations on recent glibc versions. Fixes bug 25440;
10736 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10738 o Minor bugfixes (onion services):
10739 - Fix bug that causes services to not ever rotate their descriptors
10740 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10743 o Minor bugfixes (portability):
10744 - Fix compilation of the unit tests on GNU/Hurd, which does not
10745 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10748 o Minor bugfixes (rust):
10749 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10751 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10752 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10753 - Protover parsing was accepting the presence of whitespace in
10754 version strings, which the C implementation would choke on, e.g.
10755 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10756 - Protover parsing was ignoring a 2nd hyphen and everything after
10757 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10759 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10760 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10761 - cd to ${abs_top_builddir}/src/rust before running cargo in
10762 src/test/test_rust.sh. This makes the working directory consistent
10763 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10765 o Minor bugfixes (testing, bootstrap):
10766 - When calculating bootstrap progress, check exit policies and the
10767 exit flag. Previously, Tor would only check the exit flag, which
10768 caused race conditions in small and fast networks like chutney.
10769 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
10771 o Minor bugfixes (testing, openssl compatibility):
10772 - Our "tortls/cert_matches_key" unit test no longer relies on
10773 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10774 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10775 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10777 o Minor bugfixes (Windows, compilation):
10778 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10779 27185; bugfix on 0.2.2.2-alpha.
10782 Changes in version 0.3.4.6-rc - 2018-08-06
10783 Tor 0.3.4.6-rc fixes several small compilation, portability, and
10784 correctness issues in previous versions of Tor. This version is a
10785 release candidate: if no serious bugs are found, we expect that the
10786 stable 0.3.4 release will be (almost) the same as this release.
10788 o Major bugfixes (event scheduler):
10789 - When we enable a periodic event, schedule it in the event loop
10790 rather than running it immediately. Previously, we would re-run
10791 periodic events immediately in the middle of (for example)
10792 changing our options, with unpredictable effects. Fixes bug 27003;
10793 bugfix on 0.3.4.1-alpha.
10795 o Minor features (compilation):
10796 - When building Tor, prefer to use Python 3 over Python 2, and more
10797 recent (contemplated) versions over older ones. Closes
10799 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10800 tell the compiler not to include the system malloc implementation.
10801 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10802 - Don't try to use a pragma to temporarily disable the
10803 -Wunused-const-variable warning if the compiler doesn't support
10804 it. Fixes bug 26785; bugfix on 0.3.2.11.
10806 o Minor bugfixes (continuous integration):
10807 - Skip a pair of unreliable key generation tests on Windows, until
10808 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10809 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10811 o Minor features (controller):
10812 - The control port now exposes the list of HTTPTunnelPorts and
10813 ExtOrPorts via GETINFO net/listeners/httptunnel and
10814 net/listeners/extor respectively. Closes ticket 26647.
10816 o Minor bugfixes (directory authority):
10817 - When voting for recommended versions, make sure that all of the
10818 versions are well-formed and parsable. Fixes bug 26485; bugfix
10821 o Minor features (geoip):
10822 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10823 Country database. Closes ticket 26674.
10825 o Minor features (Rust, portability):
10826 - Rust cross-compilation is now supported. Closes ticket 25895.
10828 o Minor bugfixes (compilation):
10829 - Update build system so that tor builds again with --disable-unittests
10830 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
10831 - Fix a compilation warning on some versions of GCC when building
10832 code that calls routerinfo_get_my_routerinfo() twice, assuming
10833 that the second call will succeed if the first one did. Fixes bug
10834 26269; bugfix on 0.2.8.2-alpha.
10836 o Minor bugfixes (controller):
10837 - Report the port correctly when a port is configured to bind to
10838 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10839 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
10840 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
10841 on 0.3.3.1-alpha. Patch by "akwizgran".
10843 o Minor bugfixes (correctness, flow control):
10844 - Upon receiving a stream-level SENDME cell, verify that our window
10845 has not grown too large. Fixes bug 26214; bugfix on svn
10848 o Minor bugfixes (memory, correctness):
10849 - Fix a number of small memory leaks identified by coverity. Fixes
10850 bug 26467; bugfix on numerous Tor versions.
10852 o Minor bugfixes (logging):
10853 - Improve the log message when connection initiators fail to
10854 authenticate direct connections to relays. Fixes bug 26927; bugfix
10857 o Minor bugfixes (portability):
10858 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
10859 26994; bugfix on 0.3.4.1-alpha.
10860 - Work around two different bugs in the OS X 10.10 and later SDKs
10861 that would prevent us from successfully targeting earlier versions
10862 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10864 o Minor bugfixes (single onion services, Tor2web):
10865 - Log a protocol warning when single onion services or Tor2web
10866 clients fail to authenticate direct connections to relays. Fixes
10867 bug 26924; bugfix on 0.2.9.1-alpha.
10869 o Minor bugfixes (testing):
10870 - Disable core dumps in test_bt.sh, to avoid failures in "make
10871 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10873 o Minor bugfixes (testing, compatibility):
10874 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
10875 only to pass strings (rather than "bytes" objects) to the Python
10876 subprocess module. Python 3 on Windows seems to require this.
10877 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
10878 0.3.1.1-alpha (for hs_ntor_ref.py).
10880 o Minor bugfixes (v3 onion services):
10881 - Stop sending ed25519 link specifiers in v3 onion service introduce
10882 cells and descriptors, when the rendezvous or introduction point
10883 doesn't support ed25519 link authentication. Fixes bug 26627;
10884 bugfix on 0.3.2.4-alpha.
10887 Changes in version 0.3.4.5-rc - 2018-07-13
10888 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
10889 bridge relays should upgrade.
10891 o Directory authority changes:
10892 - The "Bifroest" bridge authority has been retired; the new bridge
10893 authority is "Serge", and it is operated by George from the
10894 TorBSD project. Closes ticket 26771.
10897 Changes in version 0.3.3.9 - 2018-07-13
10898 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
10899 bridge relays should upgrade.
10901 o Directory authority changes:
10902 - The "Bifroest" bridge authority has been retired; the new bridge
10903 authority is "Serge", and it is operated by George from the
10904 TorBSD project. Closes ticket 26771.
10907 Changes in version 0.3.2.11 - 2018-07-13
10908 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
10909 bridge relays should upgrade. We also take this opportunity to backport
10912 o Directory authority changes:
10913 - The "Bifroest" bridge authority has been retired; the new bridge
10914 authority is "Serge", and it is operated by George from the
10915 TorBSD project. Closes ticket 26771.
10917 o Directory authority changes (backport from 0.3.3.7):
10918 - Add an IPv6 address for the "dannenberg" directory authority.
10919 Closes ticket 26343.
10921 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10922 - When directory authorities read a zero-byte bandwidth file, they
10923 would previously log a warning with the contents of an
10924 uninitialised buffer. They now log a warning about the empty file
10925 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10927 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10928 - Correctly detect when onion services get disabled after HUP. Fixes
10929 bug 25761; bugfix on 0.3.2.1.
10931 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10932 - Explicitly permit the poll() system call when the Linux
10933 seccomp2-based sandbox is enabled: apparently, some versions of
10934 libc use poll() when calling getpwnam(). Closes ticket 25313.
10936 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
10937 - Update the Travis CI configuration to use the stable Rust channel,
10938 now that we have decided to require that. Closes ticket 25714.
10940 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10941 - Our .travis.yml configuration now includes support for testing the
10942 results of "make distcheck". (It's not uncommon for "make check"
10943 to pass but "make distcheck" to fail.) Closes ticket 25814.
10944 - Our Travis CI configuration now integrates with the Coveralls
10945 coverage analysis tool. Closes ticket 25818.
10947 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10948 - Add several checks to detect whether Tor relays are uploading
10949 their descriptors without specifying why they regenerated them.
10950 Diagnostic for ticket 25686.
10952 o Minor features (compilation, backport from 0.3.4.4-rc):
10953 - When building Tor, prefer to use Python 3 over Python 2, and more
10954 recent (contemplated) versions over older ones. Closes
10957 o Minor features (geoip):
10958 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10959 Country database. Closes ticket 26674.
10961 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10962 - Upon receiving a malformed connected cell, stop processing the
10963 cell immediately. Previously we would mark the connection for
10964 close, but continue processing the cell as if the connection were
10965 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10967 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10968 - Allow the nanosleep() system call, which glibc uses to implement
10969 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10971 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10972 - When running the hs_ntor_ref.py test, make sure only to pass
10973 strings (rather than "bytes" objects) to the Python subprocess
10974 module. Python 3 on Windows seems to require this. Fixes bug
10975 26535; bugfix on 0.3.1.1-alpha.
10976 - When running the ntor_ref.py test, make sure only to pass strings
10977 (rather than "bytes" objects) to the Python subprocess module.
10978 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10981 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10982 - Work around a change in OpenSSL 1.1.1 where return values that
10983 would previously indicate "no password" now indicate an empty
10984 password. Without this workaround, Tor instances running with
10985 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10986 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10988 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
10989 - Document that the PerConnBW{Rate,Burst} options will fall back to
10990 their corresponding consensus parameters only if those parameters
10991 are set. Previously we had claimed that these values would always
10992 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10994 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10995 - Fix a compilation warning on some versions of GCC when building
10996 code that calls routerinfo_get_my_routerinfo() twice, assuming
10997 that the second call will succeed if the first one did. Fixes bug
10998 26269; bugfix on 0.2.8.2-alpha.
11000 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
11001 - Don't consider Tor running as a client if the ControlPort is open,
11002 but no actual client ports are open. Fixes bug 26062; bugfix
11005 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
11006 - Prevent a possible out-of-bounds smartlist read in
11007 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
11009 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
11010 - Fix a very unlikely (impossible, we believe) null pointer
11011 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11012 Coverity; this is CID 1430932.
11014 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
11015 - Fix a memory leak when a v3 onion service is configured and gets a
11016 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11017 - When parsing the descriptor signature, look for the token plus an
11018 extra white-space at the end. This is more correct but also will
11019 allow us to support new fields that might start with "signature".
11020 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11022 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
11023 - Relays now correctly block attempts to re-extend to the previous
11024 relay by Ed25519 identity. Previously they would warn in this
11025 case, but not actually reject the attempt. Fixes bug 26158; bugfix
11028 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
11029 - Avoid a crash when running with DirPort set but ORPort turned off.
11030 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11032 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
11033 - Silence unused-const-variable warnings in zstd.h with some GCC
11034 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
11036 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
11037 - Avoid intermittent test failures due to a test that had relied on
11038 onion service introduction point creation finishing within 5
11039 seconds of real clock time. Fixes bug 25450; bugfix
11042 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
11043 - Fix a C99 compliance issue in our configuration script that caused
11044 compilation issues when compiling Tor with certain versions of
11045 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11047 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
11048 - Fix a number of small memory leaks identified by coverity. Fixes
11049 bug 26467; bugfix on numerous Tor versions.
11051 o Code simplification and refactoring (backport from 0.3.3.5-rc):
11052 - Move the list of default directory authorities to its own file.
11053 Closes ticket 24854. Patch by "beastr0".
11056 Changes in version 0.2.9.16 - 2018-07-13
11057 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
11058 bridge relays should upgrade. We also take this opportunity to backport
11061 o Directory authority changes:
11062 - The "Bifroest" bridge authority has been retired; the new bridge
11063 authority is "Serge", and it is operated by George from the
11064 TorBSD project. Closes ticket 26771.
11066 o Directory authority changes (backport from 0.3.3.7):
11067 - Add an IPv6 address for the "dannenberg" directory authority.
11068 Closes ticket 26343.
11070 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
11071 - When directory authorities read a zero-byte bandwidth file, they
11072 would previously log a warning with the contents of an
11073 uninitialised buffer. They now log a warning about the empty file
11074 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11076 o Minor features (sandbox, backport from 0.3.3.4-alpha):
11077 - Explicitly permit the poll() system call when the Linux
11078 seccomp2-based sandbox is enabled: apparently, some versions of
11079 libc use poll() when calling getpwnam(). Closes ticket 25313.
11081 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
11082 - Our .travis.yml configuration now includes support for testing the
11083 results of "make distcheck". (It's not uncommon for "make check"
11084 to pass but "make distcheck" to fail.) Closes ticket 25814.
11085 - Our Travis CI configuration now integrates with the Coveralls
11086 coverage analysis tool. Closes ticket 25818.
11088 o Minor features (compilation, backport from 0.3.4.4-rc):
11089 - When building Tor, prefer to use Python 3 over Python 2, and more
11090 recent (contemplated) versions over older ones. Closes
11093 o Minor features (geoip):
11094 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
11095 Country database. Closes ticket 26674.
11097 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
11098 - Upon receiving a malformed connected cell, stop processing the
11099 cell immediately. Previously we would mark the connection for
11100 close, but continue processing the cell as if the connection were
11101 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
11103 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
11104 - Allow the nanosleep() system call, which glibc uses to implement
11105 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11107 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
11108 - When running the ntor_ref.py test, make sure only to pass strings
11109 (rather than "bytes" objects) to the Python subprocess module.
11110 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
11113 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
11114 - Work around a change in OpenSSL 1.1.1 where return values that
11115 would previously indicate "no password" now indicate an empty
11116 password. Without this workaround, Tor instances running with
11117 OpenSSL 1.1.1 would accept descriptors that other Tor instances
11118 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
11120 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
11121 - Fix a compilation warning on some versions of GCC when building
11122 code that calls routerinfo_get_my_routerinfo() twice, assuming
11123 that the second call will succeed if the first one did. Fixes bug
11124 26269; bugfix on 0.2.8.2-alpha.
11126 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
11127 - Don't consider Tor running as a client if the ControlPort is open,
11128 but no actual client ports are open. Fixes bug 26062; bugfix
11131 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
11132 - Prevent a possible out-of-bounds smartlist read in
11133 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
11135 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
11136 - Fix a very unlikely (impossible, we believe) null pointer
11137 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11138 Coverity; this is CID 1430932.
11140 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
11141 - Fix a number of small memory leaks identified by coverity. Fixes
11142 bug 26467; bugfix on numerous Tor versions.
11144 o Code simplification and refactoring (backport from 0.3.3.5-rc):
11145 - Move the list of default directory authorities to its own file.
11146 Closes ticket 24854. Patch by "beastr0".
11149 Changes in version 0.3.4.4-rc - 2018-07-09
11150 Tor 0.3.4.4-rc fixes several small compilation, portability, and
11151 correctness issues in previous versions of Tor. This version is a
11152 release candidate: if no serious bugs are found, we expect that the
11153 stable 0.3.4 release will be (almost) the same as this release.
11155 o Minor features (compilation):
11156 - When building Tor, prefer to use Python 3 over Python 2, and more
11157 recent (contemplated) versions over older ones. Closes
11160 o Minor features (geoip):
11161 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
11162 Country database. Closes ticket 26674.
11164 o Minor features (Rust, portability):
11165 - Rust cross-compilation is now supported. Closes ticket 25895.
11167 o Minor bugfixes (compilation):
11168 - Fix a compilation warning on some versions of GCC when building
11169 code that calls routerinfo_get_my_routerinfo() twice, assuming
11170 that the second call will succeed if the first one did. Fixes bug
11171 26269; bugfix on 0.2.8.2-alpha.
11173 o Minor bugfixes (control port):
11174 - Report the port correctly when a port is configured to bind to
11175 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
11176 - Handle the HSADDRESS= argument to the HSPOST command properly.
11177 (Previously, this argument was misparsed and thus ignored.) Fixes
11178 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
11180 o Minor bugfixes (correctness, flow control):
11181 - Upon receiving a stream-level SENDME cell, verify that our window
11182 has not grown too large. Fixes bug 26214; bugfix on svn
11185 o Minor bugfixes (memory, correctness):
11186 - Fix a number of small memory leaks identified by coverity. Fixes
11187 bug 26467; bugfix on numerous Tor versions.
11189 o Minor bugfixes (testing, compatibility):
11190 - When running the hs_ntor_ref.py test, make sure only to pass
11191 strings (rather than "bytes" objects) to the Python subprocess
11192 module. Python 3 on Windows seems to require this. Fixes bug
11193 26535; bugfix on 0.3.1.1-alpha.
11194 - When running the ntor_ref.py test, make sure only to pass strings
11195 (rather than "bytes" objects) to the Python subprocess module.
11196 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
11200 Changes in version 0.3.3.8 - 2018-07-09
11201 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
11202 fixes for a memory leak affecting directory authorities.
11204 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
11205 - Stop leaking memory on directory authorities when planning to
11206 vote. This bug was crashing authorities by exhausting their
11207 memory. Fixes bug 26435; bugfix on 0.3.3.6.
11209 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
11210 - Make sure that failing tests in Rust will actually cause the build
11211 to fail: previously, they were ignored. Fixes bug 26258; bugfix
11214 o Minor features (compilation, backport from 0.3.4.4-rc):
11215 - When building Tor, prefer to use Python 3 over Python 2, and more
11216 recent (contemplated) versions over older ones. Closes
11219 o Minor features (geoip):
11220 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
11221 Country database. Closes ticket 26674.
11223 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
11224 - Add several checks to detect whether Tor relays are uploading
11225 their descriptors without specifying why they regenerated them.
11226 Diagnostic for ticket 25686.
11228 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
11229 - Don't count path selection failures as circuit build failures.
11230 This change should eliminate cases where Tor blames its guard or
11231 the network for situations like insufficient microdescriptors
11232 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11235 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
11236 - Fix a compilation warning on some versions of GCC when building
11237 code that calls routerinfo_get_my_routerinfo() twice, assuming
11238 that the second call will succeed if the first one did. Fixes bug
11239 26269; bugfix on 0.2.8.2-alpha.
11241 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
11242 - Handle the HSADDRESS= argument to the HSPOST command properly.
11243 (Previously, this argument was misparsed and thus ignored.) Fixes
11244 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
11246 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
11247 - Fix a number of small memory leaks identified by coverity. Fixes
11248 bug 26467; bugfix on numerous Tor versions.
11250 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
11251 - Relays now correctly block attempts to re-extend to the previous
11252 relay by Ed25519 identity. Previously they would warn in this
11253 case, but not actually reject the attempt. Fixes bug 26158; bugfix
11256 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
11257 - When shutting down, Tor now clears all the flags in the control.c
11258 module. This should prevent a bug where authentication cookies are
11259 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11261 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
11262 - When running the hs_ntor_ref.py test, make sure only to pass
11263 strings (rather than "bytes" objects) to the Python subprocess
11264 module. Python 3 on Windows seems to require this. Fixes bug
11265 26535; bugfix on 0.3.1.1-alpha.
11266 - When running the ntor_ref.py test, make sure only to pass strings
11267 (rather than "bytes" objects) to the Python subprocess module.
11268 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
11272 Changes in version 0.3.4.3-alpha - 2018-06-26
11273 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
11274 one that was causing stability issues on directory authorities.
11276 o Major bugfixes (directory authority):
11277 - Stop leaking memory on directory authorities when planning to
11278 vote. This bug was crashing authorities by exhausting their
11279 memory. Fixes bug 26435; bugfix on 0.3.3.6.
11281 o Major bugfixes (rust, testing):
11282 - Make sure that failing tests in Rust will actually cause the build
11283 to fail: previously, they were ignored. Fixes bug 26258; bugfix
11286 o Minor feature (directory authorities):
11287 - Stop warning about incomplete bw lines before the first complete
11288 bw line has been found, so that additional header lines can be
11289 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
11291 o Minor features (relay, diagnostic):
11292 - Add several checks to detect whether Tor relays are uploading
11293 their descriptors without specifying why they regenerated them.
11294 Diagnostic for ticket 25686.
11296 o Minor features (unit tests):
11297 - Test complete bandwidth measurements files, and test that
11298 incomplete bandwidth lines only give warnings when the end of the
11299 header has not been detected. Fixes bug 25947; bugfix
11302 o Minor bugfixes (compilation):
11303 - Refrain from compiling unit testing related object files when
11304 --disable-unittests is set to configure script. Fixes bug 24891;
11305 bugfix on 0.2.5.1-alpha.
11306 - When linking the libtor_testing.a library, only include the
11307 dirauth object files once. Previously, they were getting added
11308 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
11309 - The --enable-fatal-warnings flag now affects Rust code as well.
11310 Closes ticket 26245.
11312 o Minor bugfixes (onion services):
11313 - Recompute some consensus information after detecting a clock jump,
11314 or after transitioning from a non-live consensus to a live
11315 consensus. We do this to avoid having an outdated state, and
11316 miscalculating the index for next-generation onion services. Fixes
11317 bug 24977; bugfix on 0.3.2.1-alpha.
11319 o Minor bugfixes (relay):
11320 - Relays now correctly block attempts to re-extend to the previous
11321 relay by Ed25519 identity. Previously they would warn in this
11322 case, but not actually reject the attempt. Fixes bug 26158; bugfix
11325 o Minor bugfixes (testing):
11326 - Fix compilation of the doctests in the Rust crypto crate. Fixes
11327 bug 26415; bugfix on 0.3.4.1-alpha.
11328 - Instead of trying to read the geoip configuration files from
11329 within the unit tests, instead create our own ersatz files with
11330 just enough geoip data in the format we expect. Trying to read
11331 from the source directory created problems on Windows with mingw,
11332 where the build system's paths are not the same as the platform's
11333 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
11334 - Refrain from trying to get an item from an empty smartlist in
11335 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
11336 to catch improper smartlist usage. Furthermore, enable
11337 DEBUG_SMARTLIST globally when build is configured with fragile
11338 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
11341 Changes in version 0.3.3.7 - 2018-06-12
11342 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
11343 fixes for bugs affecting compatibility and stability.
11345 o Directory authority changes:
11346 - Add an IPv6 address for the "dannenberg" directory authority.
11347 Closes ticket 26343.
11349 o Minor features (geoip):
11350 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
11351 Country database. Closes ticket 26351.
11353 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
11354 - Work around a change in OpenSSL 1.1.1 where return values that
11355 would previously indicate "no password" now indicate an empty
11356 password. Without this workaround, Tor instances running with
11357 OpenSSL 1.1.1 would accept descriptors that other Tor instances
11358 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
11360 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
11361 - Silence unused-const-variable warnings in zstd.h with some GCC
11362 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
11364 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
11365 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
11366 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
11367 miscounting the total number of circuits for these field values.)
11368 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
11370 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
11371 - Prevent a possible out-of-bounds smartlist read in
11372 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
11374 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
11375 - Only select relays when they have the descriptors we prefer to use
11376 for them. This change fixes a bug where we could select a relay
11377 because it had _some_ descriptor, but reject it later with a
11378 nonfatal assertion error because it didn't have the exact one we
11379 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11382 Changes in version 0.3.4.2-alpha - 2018-06-12
11383 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
11384 release, and forward-ports an authority-only security fix from 0.3.3.6.
11386 o Directory authority changes:
11387 - Add an IPv6 address for the "dannenberg" directory authority.
11388 Closes ticket 26343.
11390 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
11391 - Fix a bug that could have allowed an attacker to force a directory
11392 authority to use up all its RAM by passing it a maliciously
11393 crafted protocol versions string. Fixes bug 25517; bugfix on
11394 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
11396 o Minor features (continuous integration):
11397 - Add the necessary configuration files for continuous integration
11398 testing on Windows, via the Appveyor platform. Closes ticket
11399 25549. Patches from Marcin Cieślak and Isis Lovecruft.
11401 o Minor features (geoip):
11402 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
11403 Country database. Closes ticket 26351.
11405 o Minor bugfixes (compatibility, openssl):
11406 - Work around a change in OpenSSL 1.1.1 where return values that
11407 would previously indicate "no password" now indicate an empty
11408 password. Without this workaround, Tor instances running with
11409 OpenSSL 1.1.1 would accept descriptors that other Tor instances
11410 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
11412 o Minor bugfixes (compilation):
11413 - Silence unused-const-variable warnings in zstd.h with some GCC
11414 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
11415 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
11416 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
11417 - Avoid a compiler warning when casting the return value of
11418 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
11419 26283; bugfix on 0.2.4.10-alpha.
11421 o Minor bugfixes (control port):
11422 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
11423 CIRC_BW events. Previously, such cells were counted entirely in
11424 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
11427 o Minor bugfixes (controller):
11428 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
11429 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
11430 miscounting the total number of circuits for these field values.)
11431 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
11433 o Minor bugfixes (hardening):
11434 - Prevent a possible out-of-bounds smartlist read in
11435 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
11437 o Minor bugfixes (onion services):
11438 - Fix a bug that blocked the creation of ephemeral v3 onion
11439 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
11441 o Minor bugfixes (test coverage tools):
11442 - Update our "cov-diff" script to handle output from the latest
11443 version of gcov, and to remove extraneous timestamp information
11444 from its output. Fixes bugs 26101 and 26102; bugfix
11448 Changes in version 0.3.3.6 - 2018-05-22
11449 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
11450 backports several important fixes from the 0.3.4.1-alpha.
11452 The Tor 0.3.3 series includes controller support and other
11453 improvements for v3 onion services, official support for embedding Tor
11454 within other applications, and our first non-trivial module written in
11455 the Rust programming language. (Rust is still not enabled by default
11456 when building Tor.) And as usual, there are numerous other smaller
11457 bugfixes, features, and improvements.
11459 Below are the changes since 0.3.3.5-rc. For a list of all changes
11460 since 0.3.2.10, see the ReleaseNotes file.
11462 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
11463 - When directory authorities read a zero-byte bandwidth file, they
11464 would previously log a warning with the contents of an
11465 uninitialised buffer. They now log a warning about the empty file
11466 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11468 o Major bugfixes (security, directory authority, denial-of-service):
11469 - Fix a bug that could have allowed an attacker to force a directory
11470 authority to use up all its RAM by passing it a maliciously
11471 crafted protocol versions string. Fixes bug 25517; bugfix on
11472 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
11474 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
11475 - Avoid a rare assertion failure in the circuit build timeout code
11476 if we fail to allow any circuits to actually complete. Fixes bug
11477 25733; bugfix on 0.2.2.2-alpha.
11479 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
11480 - Avoid a crash when testing router reachability on a router that
11481 could have an ed25519 ID, but which does not. Fixes bug 25415;
11482 bugfix on 0.3.3.2-alpha.
11484 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
11485 - Correctly detect when onion services get disabled after HUP. Fixes
11486 bug 25761; bugfix on 0.3.2.1.
11488 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
11489 - Impose a limit on circuit cell queue size. The limit can be
11490 controlled by a consensus parameter. Fixes bug 25226; bugfix
11493 o Minor features (compatibility, backport from 0.3.4.1-alpha):
11494 - Avoid some compilation warnings with recent versions of LibreSSL.
11495 Closes ticket 26006.
11497 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
11498 - Our .travis.yml configuration now includes support for testing the
11499 results of "make distcheck". (It's not uncommon for "make check"
11500 to pass but "make distcheck" to fail.) Closes ticket 25814.
11501 - Our Travis CI configuration now integrates with the Coveralls
11502 coverage analysis tool. Closes ticket 25818.
11504 o Minor features (geoip):
11505 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11506 database. Closes ticket 26104.
11508 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
11509 - Don't consider Tor running as a client if the ControlPort is open,
11510 but no actual client ports are open. Fixes bug 26062; bugfix
11513 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
11514 - Upon receiving a malformed connected cell, stop processing the
11515 cell immediately. Previously we would mark the connection for
11516 close, but continue processing the cell as if the connection were
11517 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
11519 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
11520 - Stop saying in the manual that clients cache ipv4 dns answers from
11521 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11522 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11523 we forgot to say so in the man page. Fixes bug 26052; bugfix
11526 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
11527 - Allow the nanosleep() system call, which glibc uses to implement
11528 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11530 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
11531 - Fix a memory leak when a v3 onion service is configured and gets a
11532 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11533 - When parsing the descriptor signature, look for the token plus an
11534 extra white-space at the end. This is more correct but also will
11535 allow us to support new fields that might start with "signature".
11536 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11538 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
11539 - Avoid a crash when running with DirPort set but ORPort turned off.
11540 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11542 o Documentation (backport from 0.3.4.1-alpha):
11543 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11544 ticket 25857. Patch from "CTassisF".
11547 Changes in version 0.3.4.1-alpha - 2018-05-17
11548 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
11549 includes refactoring to begin reducing Tor's binary size and idle CPU
11550 usage on mobile, along with prep work for new bandwidth scanners,
11551 improvements to the experimental "vanguards" feature, and numerous
11552 other small features and bugfixes.
11554 o New system requirements:
11555 - Tor no longer tries to support old operating systems without
11556 mmap() or some local equivalent. Apparently, compilation on such
11557 systems has been broken for some time, without anybody noticing or
11558 complaining. Closes ticket 25398.
11560 o Major feature (directory authority, modularization):
11561 - The directory authority subsystem has been modularized. The code
11562 is now located in src/or/dirauth/, and is compiled in by default.
11563 To disable the module, the configure option
11564 --disable-module-dirauth has been added. This module may be
11565 disabled by default in some future release. Closes ticket 25610.
11567 o Major features (main loop, CPU usage):
11568 - When Tor is disabled (via DisableNetwork or via hibernation), it
11569 no longer needs to run any per-second events. This change should
11570 make it easier for mobile applications to disable Tor while the
11571 device is sleeping, or Tor is not running. Closes ticket 26063.
11572 - Tor no longer enables all of its periodic events by default.
11573 Previously, Tor would enable all possible main loop events,
11574 regardless of whether it needed them. Furthermore, many of these
11575 events are now disabled with Tor is hibernating or DisableNetwork
11576 is set. This is a big step towards reducing client CPU usage by
11577 reducing the amount of wake-ups the daemon does. Closes ticket
11579 - The bandwidth-limitation logic has been refactored so that
11580 bandwidth calculations are performed on-demand, rather than every
11581 TokenBucketRefillInterval milliseconds. This change should improve
11582 the granularity of our bandwidth calculations, and limit the
11583 number of times that the Tor process needs to wake up when it is
11584 idle. Closes ticket 25373.
11585 - Move responsibility for many operations from a once-per-second
11586 callback to a callback that is only scheduled as needed. Moving
11587 this functionality has allowed us to disable the callback when
11588 Tor's network is disabled. Once enough items are removed from our
11589 once-per-second callback, we can eliminate it entirely to conserve
11590 CPU when idle. The functionality removed includes: closing
11591 connections, circuits, and channels (ticket 25932); consensus
11592 voting (25937); flushing log callbacks (25951); honoring delayed
11593 SIGNEWNYM requests (25949); rescanning the consensus cache
11594 (25931); saving the state file to disk (25948); warning relay
11595 operators about unreachable ports (25952); and keeping track of
11596 Tor's uptime (26009).
11598 o Major bugfixes (directory authorities, security):
11599 - When directory authorities read a zero-byte bandwidth file, they
11600 would previously log a warning with the contents of an
11601 uninitialised buffer. They now log a warning about the empty file
11602 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11604 o Major bugfixes (crash):
11605 - Avoid a rare assertion failure in the circuit build timeout code
11606 if we fail to allow any circuits to actually complete. Fixes bug
11607 25733; bugfix on 0.2.2.2-alpha.
11609 o Major bugfixes (directory authority):
11610 - Avoid a crash when testing router reachability on a router that
11611 could have an ed25519 ID, but which does not. Fixes bug 25415;
11612 bugfix on 0.3.3.2-alpha.
11614 o Major bugfixes (onion service):
11615 - Correctly detect when onion services get disabled after HUP. Fixes
11616 bug 25761; bugfix on 0.3.2.1.
11618 o Major bugfixes (protover, voting):
11619 - Revise Rust implementation of protover to use a more memory-
11620 efficient voting algorithm and corresponding data structures, thus
11621 avoiding a potential (but small impact) DoS attack where specially
11622 crafted protocol strings would expand to several potential
11623 megabytes in memory. In the process, several portions of code were
11624 revised to be methods on new, custom types, rather than functions
11625 taking interchangeable types, thus increasing type safety of the
11626 module. Custom error types and handling were added as well, in
11627 order to facilitate better error dismissal/handling in outside
11628 crates and avoid mistakenly passing an internal error string to C
11629 over the FFI boundary. Many tests were added, and some previous
11630 differences between the C and Rust implementations have been
11631 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11633 o Major bugfixes (relay, denial of service):
11634 - Impose a limit on circuit cell queue size. The limit can be
11635 controlled by a consensus parameter. Fixes bug 25226; bugfix
11638 o Minor features (accounting):
11639 - When Tor becomes dormant, it now uses a scheduled event to wake up
11640 at the right time. Previously, we would use the per-second timer
11641 to check whether to wake up, but we no longer have any per-second
11642 timers enabled when the network is disabled. Closes ticket 26064.
11644 o Minor features (code quality):
11645 - Add optional spell-checking for the Tor codebase, using the
11646 "misspell" program. To use this feature, run "make check-typos".
11647 Closes ticket 25024.
11649 o Minor features (compatibility):
11650 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
11651 the no-deprecated option, and builds correctly with them. Closes
11652 tickets 19429, 19981, and 25353.
11653 - Avoid some compilation warnings with recent versions of LibreSSL.
11654 Closes ticket 26006.
11656 o Minor features (compression, zstd):
11657 - When running with zstd, Tor now considers using advanced functions
11658 that the zstd maintainers have labeled as potentially unstable. To
11659 prevent breakage, Tor will only use this functionality when the
11660 runtime version of the zstd library matches the version with which
11661 Tor was compiled. Closes ticket 25162.
11663 o Minor features (configuration):
11664 - The "DownloadSchedule" options have been renamed to end with
11665 "DownloadInitialDelay". The old names are still allowed, but will
11666 produce a warning. Comma-separated lists are still permitted for
11667 these options, but all values after the first are ignored (as they
11668 have been since 0.2.9). Closes ticket 23354.
11670 o Minor features (continuous integration):
11671 - Our .travis.yml configuration now includes support for testing the
11672 results of "make distcheck". (It's not uncommon for "make check"
11673 to pass but "make distcheck" to fail.) Closes ticket 25814.
11674 - Our Travis CI configuration now integrates with the Coveralls
11675 coverage analysis tool. Closes ticket 25818.
11677 o Minor features (control port):
11678 - Introduce GETINFO "current-time/{local,utc}" to return the local
11679 and UTC times respectively in ISO format. This helps a controller
11680 like Tor Browser detect a time-related error. Closes ticket 25511.
11681 Patch by Neel Chauhan.
11682 - Introduce new fields to the CIRC_BW event. There are two new
11683 fields in each of the read and written directions. The DELIVERED
11684 fields report the total valid data on the circuit, as measured by
11685 the payload sizes of verified and error-checked relay command
11686 cells. The OVERHEAD fields report the total unused bytes in each
11687 of these cells. Closes ticket 25903.
11689 o Minor features (directory authority):
11690 - Directory authorities now open their key-pinning files as O_SYNC,
11691 to limit their chances of accidentally writing partial lines.
11692 Closes ticket 23909.
11694 o Minor features (directory authority, forward compatibility):
11695 - Make the lines of the measured bandwidth file able to contain
11696 their entries in any order. Previously, the node_id entry needed
11697 to come first. Closes ticket 26004.
11699 o Minor features (entry guards):
11700 - Introduce a new torrc option NumPrimaryGuards for controlling the
11701 number of primary guards. Closes ticket 25843.
11703 o Minor features (geoip):
11704 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11705 database. Closes ticket 26104.
11707 o Minor features (performance):
11708 - Avoid a needless call to malloc() when processing an incoming
11709 relay cell. Closes ticket 24914.
11710 - Make our timing-wheel code run a tiny bit faster on 32-bit
11711 platforms, by preferring 32-bit math to 64-bit. Closes
11713 - Avoid a needless malloc()/free() pair every time we handle an ntor
11714 handshake. Closes ticket 25150.
11716 o Minor features (testing):
11717 - Add a unit test for voting_schedule_get_start_of_next_interval().
11718 Closes ticket 26014, and helps make unit test coverage
11719 more deterministic.
11720 - A new unittests module specifically for testing the functions in
11721 the (new-ish) bridges.c module has been created with new
11722 unittests, raising the code coverage percentages. Closes 25425.
11723 - We now have improved testing for addressmap_get_virtual_address()
11724 function. This should improve our test coverage, and make our test
11725 coverage more deterministic. Closes ticket 25993.
11727 o Minor features (timekeeping, circuit scheduling):
11728 - When keeping track of how busy each circuit have been recently on
11729 a given connection, use coarse-grained monotonic timers rather
11730 than gettimeofday(). This change should marginally increase
11731 accuracy and performance. Implements part of ticket 25927.
11733 o Minor bugfixes (bandwidth management):
11734 - Consider ourselves "low on write bandwidth" if we have exhausted
11735 our write bandwidth some time in the last second. This was the
11736 documented behavior before, but the actual behavior was to change
11737 this value every TokenBucketRefillInterval. Fixes bug 25828;
11738 bugfix on 0.2.3.5-alpha.
11740 o Minor bugfixes (C correctness):
11741 - Add a missing lock acquisition in the shutdown code of the control
11742 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
11743 Coverity; this is CID 1433643.
11745 o Minor bugfixes (circuit path selection):
11746 - Don't count path selection failures as circuit build failures.
11747 This change should eliminate cases where Tor blames its guard or
11748 the network for situations like insufficient microdescriptors
11749 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11752 o Minor bugfixes (client):
11753 - Don't consider Tor running as a client if the ControlPort is open,
11754 but no actual client ports are open. Fixes bug 26062; bugfix
11757 o Minor bugfixes (code style):
11758 - Fixed multiple includes of transports.h in src/or/connection.c
11759 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
11760 - Remove the unused variable n_possible from the function
11761 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
11763 o Minor bugfixes (control interface):
11764 - Respond with more human-readable error messages to GETINFO exit-
11765 policy/* requests. Also, let controller know if an error is
11766 transient (response code 551) or not (response code 552). Fixes
11767 bug 25852; bugfix on 0.2.8.1-alpha.
11769 o Minor bugfixes (controller):
11770 - Make CIRC_BW event reflect the total of all data sent on a
11771 circuit, including padding and dropped cells. Also fix a mis-
11772 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
11773 bugfix on 0.2.5.2-alpha.
11775 o Minor bugfixes (correctness, client):
11776 - Upon receiving a malformed connected cell, stop processing the cell
11777 immediately. Previously we would mark the connection for close, but
11778 continue processing the cell as if the connection were open. Fixes bug
11779 26072; bugfix on 0.2.4.7-alpha.
11781 o Minor bugfixes (directory client):
11782 - When unverified-consensus is verified, rename it to cached-
11783 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
11784 - Fixed launching a certificate fetch always during the scheduled
11785 periodic consensus fetch by fetching only in those cases when
11786 consensus are waiting for certs. Fixes bug 24740; bugfix
11789 o Minor bugfixes (documentation):
11790 - Stop saying in the manual that clients cache ipv4 dns answers from
11791 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11792 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11793 we forgot to say so in the man page. Fixes bug 26052; bugfix
11796 o Minor bugfixes (error reporting):
11797 - Improve tolerance for directory authorities with skewed clocks.
11798 Previously, an authority with a clock more than 60 seconds ahead
11799 could cause a client with a correct clock to warn that the
11800 client's clock was behind. Now the clocks of a majority of
11801 directory authorities have to be ahead of the client before this
11802 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
11804 o Minor bugfixes (Linux seccomp2 sandbox):
11805 - Allow the nanosleep() system call, which glibc uses to implement
11806 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11808 o Minor bugfixes (onion service):
11809 - Fix a memory leak when a v3 onion service is configured and gets a
11810 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11811 - When parsing the descriptor signature, look for the token plus an
11812 extra white-space at the end. This is more correct but also will
11813 allow us to support new fields that might start with "signature".
11814 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11816 o Minor bugfixes (path selection):
11817 - Only select relays when they have the descriptors we prefer to use
11818 for them. This change fixes a bug where we could select a relay
11819 because it had _some_ descriptor, but reject it later with a
11820 nonfatal assertion error because it didn't have the exact one we
11821 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11823 o Minor bugfixes (portability):
11824 - Do not align mmap length, as it is not required by POSIX, and the
11825 getpagesize function is deprecated. Fixes bug 25399; bugfix
11828 o Minor bugfixes (portability, FreeBSD):
11829 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
11830 does not stringify on FreeBSD, so we switch to tor_asprintf().
11831 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
11833 o Minor bugfixes (relay statistics):
11834 - When a relay is collecting internal statistics about how many
11835 create cell requests it has seen of each type, accurately count
11836 the requests from relays that temporarily fall out of the
11837 consensus. (To be extra conservative, we were already ignoring
11838 requests from clients in our counts, and we continue ignoring them
11839 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
11841 o Minor bugfixes (relay, crash):
11842 - Avoid a crash when running with DirPort set but ORPort turned off.
11843 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11845 o Minor bugfixes (restart-in-process):
11846 - When shutting down, Tor now clears all the flags in the control.c
11847 module. This should prevent a bug where authentication cookies are
11848 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11850 o Minor bugfixes (testing):
11851 - When testing workqueue event-cancellation, make sure that we
11852 actually cancel an event, and that cancel each event with equal
11853 probability. (It was previously possible, though extremely
11854 unlikely, for our event-canceling test not to cancel any events.)
11855 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
11856 - Repeat part of the test in test_client_pick_intro() a number of
11857 times, to give it consistent coverage. Fixes bug 25996; bugfix
11859 - Remove randomness from the hs_common/responsible_hsdirs test, so
11860 that it always takes the same path through the function it tests.
11861 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
11862 - Change the behavior of the "channel/outbound" test so that it
11863 never causes a 10-second rollover for the EWMA circuitmux code.
11864 Previously, this behavior would happen randomly, and result in
11865 fluctuating test coverage. Fixes bug 25994; bugfix
11867 - Use X509_new() to allocate certificates that will be freed later
11868 with X509_free(). Previously, some parts of the unit tests had
11869 used tor_malloc_zero(), which is incorrect, and which caused test
11870 failures on Windows when they were built with extra hardening.
11871 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
11873 - While running the circuit_timeout test, fix the PRNG to a
11874 deterministic AES stream, so that the test coverage from this test
11875 will itself be deterministic. Fixes bug 25995; bugfix
11878 o Minor bugfixes (vanguards):
11879 - Allow the last hop in a vanguard circuit to be the same as our
11880 first, to prevent the adversary from influencing guard node choice
11881 by choice of last hop. Also prevent the creation of A - B - A
11882 paths, or A - A paths, which are forbidden by relays. Fixes bug
11883 25870; bugfix on 0.3.3.1-alpha.
11885 o Code simplification and refactoring:
11886 - Remove duplicate code in parse_{c,s}method_line and bootstrap
11887 their functionalities into a single function. Fixes bug 6236;
11888 bugfix on 0.2.3.6-alpha.
11889 - We remove the PortForwarding and PortForwardingHelper options,
11890 related functions, and the port_forwarding tests. These options
11891 were used by the now-deprecated Vidalia to help ordinary users
11892 become Tor relays or bridges. Closes ticket 25409. Patch by
11894 - In order to make the OR and dir checking function in router.c less
11895 confusing we renamed some functions and
11896 consider_testing_reachability() has been split into
11897 router_should_check_reachability() and
11898 router_do_reachability_checks(). Also we improved the documentation
11899 in some functions. Closes ticket 18918.
11900 - Initial work to isolate Libevent usage to a handful of modules in
11901 our codebase, to simplify our call structure, and so that we can
11902 more easily change event loops in the future if needed. Closes
11904 - Introduce a function to call getsockname() and return tor_addr_t,
11905 to save a little complexity throughout the codebase. Closes
11907 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
11908 as hsdir_index is always present. Also, we move hsdir_index_t into
11909 or.h. Closes ticket 23094. Patch by Neel Chauhan.
11910 - Merge functions used for describing nodes and suppress the
11911 functions that do not allocate memory for the output buffer
11912 string. NODE_DESC_BUF_LEN constant and format_node_description()
11913 function cannot be used externally from router.c module anymore.
11914 Closes ticket 25432. Patch by valentecaio.
11915 - Our main loop has been simplified so that all important operations
11916 happen inside events. Previously, some operations had to happen
11917 outside the event loop, to prevent infinite sequences of event
11918 activations. Closes ticket 25374.
11919 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
11920 it in register_intro_circ() and service_intro_point_new(). This
11921 prevents the digest from being re-calculated each time. Closes
11922 ticket 23107. Patch by Neel Chauhan.
11923 - Refactor token-bucket implementations to use a common backend.
11924 Closes ticket 25766.
11925 - Remove extern declaration of stats_n_seconds_working variable from
11926 main, protecting its accesses with get_uptime() and reset_uptime()
11927 functions. Closes ticket 25081, patch by “valentecaio”.
11928 - Remove our previous logic for "cached gettimeofday()" -- our
11929 coarse monotonic timers are fast enough for this purpose, and far
11930 less error-prone. Implements part of ticket 25927.
11931 - Remove the return value for fascist_firewall_choose_address_base(),
11932 and sister functions such as fascist_firewall_choose_address_node()
11933 and fascist_firewall_choose_address_rs(). Also, while we're here,
11934 initialize the ap argument as leaving it uninitialized can pose a
11935 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
11936 - Rename two fields of connection_t struct. timestamp_lastwritten is
11937 renamed to timestamp_last_write_allowed and timestamp_lastread is
11938 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
11940 - Since Tor requires C99, remove our old workaround code for libc
11941 implementations where free(NULL) doesn't work. Closes ticket 24484.
11942 - Use our standard rate-limiting code to deal with excessive
11943 libevent failures, rather than the hand-rolled logic we had
11944 before. Closes ticket 26016.
11945 - We remove the return value of node_get_prim_orport() and
11946 node_get_prim_dirport(), and introduce node_get_prim_orport() in
11947 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
11948 check for a null address. Closes ticket 23873. Patch by
11950 - We switch to should_record_bridge_info() in
11951 geoip_note_client_seen() and options_need_geoip_info() instead of
11952 accessing the configuration values directly. Fixes bug 25290;
11953 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
11955 o Deprecated features:
11956 - As we are not recommending 0.2.5 anymore, we require relays that
11957 once had an ed25519 key associated with their RSA key to always
11958 have that key, instead of allowing them to drop back to a version
11959 that didn't support ed25519. This means they need to use a new RSA
11960 key if they want to downgrade to an older version of tor without
11961 ed25519. Closes ticket 20522.
11964 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11965 ticket 25857. Patch from "CTassisF".
11967 o Removed features:
11968 - Directory authorities will no longer support voting according to
11969 any consensus method before consensus method 25. This keeps
11970 authorities compatible with all authorities running 0.2.9.8 and
11971 later, and does not break any clients or relays. Implements ticket
11972 24378 and proposal 290.
11973 - The PortForwarding and PortForwardingHelper features have been
11974 removed. The reasoning is, given that implementations of NAT
11975 traversal protocols within common consumer grade routers are
11976 frequently buggy, and that the target audience for a NAT punching
11977 feature is a perhaps less-technically-inclined relay operator,
11978 when the helper fails to setup traversal the problems are usually
11979 deep, ugly, and very router specific, making them horrendously
11980 impossible for technical support to reliable assist with, and thus
11981 resulting in frustration all around. Unfortunately, relay
11982 operators who would like to run relays behind NATs will need to
11983 become more familiar with the port forwarding configurations on
11984 their local router. Closes 25409.
11985 - The TestingEnableTbEmptyEvent option has been removed. It was used
11986 in testing simulations to measure how often connection buckets
11987 were emptied, in order to improve our scheduling, but it has not
11988 been actively used in years. Closes ticket 25760.
11989 - The old "round-robin" circuit multiplexer (circuitmux)
11990 implementation has been removed, along with a fairly large set of
11991 code that existed to support it. It has not been the default
11992 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
11993 but it still required an unreasonable amount of memory and CPU.
11994 Closes ticket 25268.
11997 Changes in version 0.3.3.5-rc - 2018-04-15
11998 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
11999 including some that could affect reliability or correctness.
12001 This is the first release candidate in the 0.3.3 series. If we find no
12002 new bugs or regression here, then the first stable 0.3.3 release will
12003 be nearly identical to this one.
12005 o Major bugfixes (security, protover, voting):
12006 - Revise Rust implementation of protover to use a more memory-
12007 efficient voting algorithm and corresponding data structures, thus
12008 avoiding a potential memory-based DoS attack where specially
12009 crafted protocol strings would expand to fill available memory.
12010 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
12012 o Major bugfixes (performance, load balancing):
12013 - Directory authorities no longer vote in favor of the Guard flag
12014 for relays without directory support. Starting in Tor
12015 0.3.0.1-alpha, clients have been avoiding using such relays in the
12016 Guard position, leading to increasingly broken load balancing for
12017 the 5%-or-so of Guards that don't advertise directory support.
12018 Fixes bug 22310; bugfix on 0.3.0.6.
12020 o Minor feature (continuous integration):
12021 - Update the Travis CI configuration to use the stable Rust channel,
12022 now that we have decided to require that. Closes ticket 25714.
12024 o Minor features (config options):
12025 - Change the way the default value for MaxMemInQueues is calculated.
12026 We now use 40% of the hardware RAM if the system has 8 GB RAM or
12027 more. Otherwise we use the former value of 75%. Closes
12030 o Minor features (geoip):
12031 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
12032 Country database. Closes ticket 25718.
12034 o Minor bugfixes (client):
12035 - When using a listed relay as a bridge, and also using
12036 microdescriptors, and considering that relay as a non-bridge in a
12037 circuit, treat its microdescriptor as a valid source of
12038 information about that relay. This change should prevent a non-
12039 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
12041 o Minor bugfixes (controller):
12042 - Restore the correct operation of the RESOLVE command, which had
12043 been broken since we added the ability to enable/disable DNS on
12044 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
12046 o Minor bugfixes (distribution, compilation, rust):
12047 - Build correctly when the rust dependencies submodule is loaded,
12048 but the TOR_RUST_DEPENDENCIES environment variable is not set.
12049 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
12050 - Actually include all of our Rust source in our source
12051 distributions. (Previously, a few of the files were accidentally
12052 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
12054 o Minor bugfixes (documentation):
12055 - Document that the PerConnBW{Rate,Burst} options will fall back to
12056 their corresponding consensus parameters only if those parameters
12057 are set. Previously we had claimed that these values would always
12058 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
12059 - Revert a misformatting issue in the ExitPolicy documentation.
12060 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
12062 o Minor bugfixes (exit relay DNS retries):
12063 - Re-attempt timed-out DNS queries 3 times before failure, since our
12064 timeout is 5 seconds for them, but clients wait 10-15. Also allow
12065 slightly more timeouts per resolver when an exit has multiple
12066 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
12068 o Minor bugfixes (onion services):
12069 - Re-instate counting the client HSDir fetch circuits against the
12070 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
12072 - Remove underscores from the _HSLayer{2,3}Nodes options. This
12073 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
12074 Fixes bug 25581; bugfix on 0.3.3.1-alpha
12076 o Code simplification and refactoring:
12077 - Move the list of default directory authorities to its own file.
12078 Closes ticket 24854. Patch by "beastr0".
12080 o Documentation (manpage, denial of service):
12081 - Provide more detail about the denial-of-service options, by
12082 listing each mitigation and explaining how they relate. Closes
12086 Changes in version 0.3.3.4-alpha - 2018-03-29
12087 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
12088 the alpha testing of earlier releases in its series. We are
12089 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
12091 o New system requirements:
12092 - When built with Rust, Tor now depends on version 0.2.39 of the
12093 libc crate. Closes tickets 25310 and 25664.
12095 o Major bugfixes (relay, connection):
12096 - If we have failed to connect to a relay and received a connection
12097 refused, timeout, or similar error (at the TCP level), do not try
12098 that same address/port again for 60 seconds after the failure has
12099 occurred. Fixes bug 24767; bugfix on 0.0.6.
12101 o Minor features (geoip):
12102 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
12103 Country database. Closes ticket 25469.
12105 o Minor features (log messages):
12106 - Improve log message in the out-of-memory handler to include
12107 information about memory usage from the different compression
12108 backends. Closes ticket 25372.
12110 o Minor features (sandbox):
12111 - Explicitly permit the poll() system call when the Linux
12112 seccomp2-based sandbox is enabled: apparently, some versions of
12113 libc use poll() when calling getpwnam(). Closes ticket 25313.
12115 o Minor bugfixes (C correctness):
12116 - Fix a very unlikely (impossible, we believe) null pointer
12117 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
12118 Coverity; this is CID 1430932.
12120 o Minor bugfixes (channel, client):
12121 - Better identify client connection when reporting to the geoip
12122 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
12124 o Minor bugfixes (compilation):
12125 - Fix a C99 compliance issue in our configuration script that caused
12126 compilation issues when compiling Tor with certain versions of
12127 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
12129 o Minor bugfixes (controller, reliability):
12130 - Avoid a (nonfatal) assertion failure when extending a one-hop
12131 circuit from the controller to become a multihop circuit. Fixes
12132 bug 24903; bugfix on 0.2.5.2-alpha.
12134 o Major bugfixes (networking):
12135 - Tor will no longer reject IPv6 address strings from Tor Browser
12136 when they are passed as hostnames in SOCKS5 requests. Fixes bug
12137 25036, bugfix on Tor 0.3.1.2.
12139 o Minor bugfixes (networking):
12140 - string_is_valid_hostname() will not consider IP strings to be
12141 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
12143 o Minor bugfixes (onion service v3):
12144 - Avoid an assertion failure when the next onion service
12145 descriptor rotation type is out of sync with the consensus's
12146 valid-after time. Instead, log a warning message with extra
12147 information, so we can better hunt down the cause of this
12148 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
12150 o Minor bugfixes (testing):
12151 - Avoid intermittent test failures due to a test that had relied on
12152 onion service introduction point creation finishing within 5
12153 seconds of real clock time. Fixes bug 25450; bugfix
12155 - Rust crates are now automatically detected and tested. Previously,
12156 some crates were not tested by `make test-rust` due to a static
12157 string in the `src/test/test_rust.sh` script specifying which
12158 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
12160 o Minor bugfixes (testing, benchmarks):
12161 - Fix a crash when running benchmark tests on win32 systems. The
12162 crash was due to a mutex that wasn't initialized before logging
12163 and options were initialized. Fixes bug 25479; bugfix
12166 o Minor bugfixes (warnings, ipv6):
12167 - Avoid a bug warning that could occur when trying to connect to a
12168 relay over IPv6. This warning would occur on a Tor instance that
12169 downloads router descriptors, but prefers to use microdescriptors.
12170 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
12172 o Code simplification and refactoring:
12173 - Remove the old (deterministic) directory retry logic entirely:
12174 We've used exponential backoff exclusively for some time. Closes
12178 - Improved the documentation of AccountingStart parameter. Closes
12180 - Update the documentation for "Log" to include the current list of
12181 logging domains. Closes ticket 25378.
12184 Changes in version 0.3.1.10 - 2018-03-03
12185 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
12188 It includes an important security fix for a remote crash attack
12189 against directory authorities, tracked as TROVE-2018-001.
12191 This release also backports our new system for improved resistance to
12192 denial-of-service attacks against relays.
12194 This release also fixes several minor bugs and annoyances from
12197 All directory authorities should upgrade to one of the versions
12198 released today. Relays running 0.3.1.x may wish to update to one of
12199 the versions released today, for the DoS mitigations.
12201 Please note: according to our release calendar, Tor 0.3.1 will no
12202 longer be supported after 1 July 2018. If you will be running Tor
12203 after that date, you should make sure to plan to upgrade to the latest
12204 stable version, or downgrade to 0.2.9 (which will receive long-term
12207 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12208 - Fix a protocol-list handling bug that could be used to remotely crash
12209 directory authorities with a null-pointer exception. Fixes bug 25074;
12210 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12213 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
12214 - Give relays some defenses against the recent network overload. We
12215 start with three defenses (default parameters in parentheses).
12216 First: if a single client address makes too many concurrent
12217 connections (>100), hang up on further connections. Second: if a
12218 single client address makes circuits too quickly (more than 3 per
12219 second, with an allowed burst of 90) while also having too many
12220 connections open (3), refuse new create cells for the next while
12221 (1-2 hours). Third: if a client asks to establish a rendezvous
12222 point to you directly, ignore the request. These defenses can be
12223 manually controlled by new torrc options, but relays will also
12224 take guidance from consensus parameters, so there's no need to
12225 configure anything manually. Implements ticket 24902.
12227 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
12228 - Update the sandbox rules so that they should now work correctly
12229 with Glibc 2.26. Closes ticket 24315.
12231 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
12232 - Fix an "off by 2" error in counting rendezvous failures on the
12233 onion service side. While we thought we would stop the rendezvous
12234 attempt after one failed circuit, we were actually making three
12235 circuit attempts before giving up. Now switch to a default of 2,
12236 and allow the consensus parameter "hs_service_max_rdv_failures" to
12237 override. Fixes bug 24895; bugfix on 0.0.6.
12239 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
12240 - Add Link protocol version 5 to the supported protocols list. Fixes
12241 bug 25070; bugfix on 0.3.1.1-alpha.
12243 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
12244 - Fix a set of false positives where relays would consider
12245 connections to other relays as being client-only connections (and
12246 thus e.g. deserving different link padding schemes) if those
12247 relays fell out of the consensus briefly. Now we look only at the
12248 initial handshake and whether the connection authenticated as a
12249 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12251 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
12252 - Make our OOM handler aware of the geoip client history cache so it
12253 doesn't fill up the memory. This check is important for IPv6 and
12254 our DoS mitigation subsystem. Closes ticket 25122.
12256 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
12257 - Change relay bandwidth reporting stats interval from 4 hours to 24
12258 hours in order to reduce the efficiency of guard discovery
12259 attacks. Fixes ticket 23856.
12261 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
12262 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12263 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12264 since they neither disabled TLS 1.3 nor enabled any of the
12265 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12266 Closes ticket 24978.
12268 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
12269 - The fallback directory list has been re-generated based on the
12270 current status of the network. Tor uses fallback directories to
12271 bootstrap when it doesn't yet have up-to-date directory
12272 information. Closes ticket 24801.
12273 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12274 prefer to bootstrap from fallback directory mirrors. This is a
12275 follow-up to 24679, which removed weights from the default
12276 fallbacks. Implements ticket 24681.
12278 o Minor features (geoip):
12279 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12282 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12283 - Use the actual observed address of an incoming relay connection,
12284 not the canonical address of the relay from its descriptor, when
12285 making decisions about how to handle the incoming connection.
12286 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12288 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12289 - Directory authorities, when refusing a descriptor from a rejected
12290 relay, now explicitly tell the relay (in its logs) to set a valid
12291 ContactInfo address and contact the bad-relays@ mailing list.
12292 Fixes bug 25170; bugfix on 0.2.9.1.
12294 o Minor bugfixes (address selection, backport from 0.3.2.9):
12295 - When the fascist_firewall_choose_address_ functions don't find a
12296 reachable address, set the returned address to the null address
12297 and port. This is a precautionary measure, because some callers do
12298 not check the return value. Fixes bug 24736; bugfix
12301 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
12302 - Fetch descriptors aggressively whenever we lack enough to build
12303 circuits, regardless of how many descriptors we are missing.
12304 Previously, we would delay launching the fetch when we had fewer
12305 than 15 missing descriptors, even if some of those descriptors
12306 were blocking circuits from building. Fixes bug 23985; bugfix on
12307 0.1.1.11-alpha. The effects of this bug became worse in
12308 0.3.0.3-alpha, when we began treating missing descriptors from our
12309 primary guards as a reason to delay circuits.
12310 - Don't try fetching microdescriptors from relays that have failed
12311 to deliver them in the past. Fixes bug 23817; bugfix
12314 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
12315 - Fix a signed/unsigned comparison warning introduced by our fix to
12316 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12318 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
12319 - Avoid a crash when attempting to use the seccomp2 sandbox together
12320 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12323 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12324 - Fix a possible crash on malformed consensus. If a consensus had
12325 contained an unparseable protocol line, it could have made clients
12326 and relays crash with a null-pointer exception. To exploit this
12327 issue, however, an attacker would need to be able to subvert the
12328 directory authority system. Fixes bug 25251; bugfix on
12329 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12331 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
12332 - Recover better from empty or corrupt files in the consensus cache
12333 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
12334 - When a consensus diff calculation is only partially successful,
12335 only record the successful parts as having succeeded. Partial
12336 success can happen if (for example) one compression method fails
12337 but the others succeed. Previously we misrecorded all the
12338 calculations as having succeeded, which would later cause a
12339 nonfatal assertion failure. Fixes bug 24086; bugfix
12342 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
12343 - Tor now updates its guard state when it reads a consensus
12344 regardless of whether it's missing descriptors. That makes tor use
12345 its primary guards to fetch descriptors in some edge cases where
12346 it would previously have used fallback directories. Fixes bug
12347 23862; bugfix on 0.3.0.1-alpha.
12349 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12350 - Don't treat inability to store a cached consensus object as a bug:
12351 it can happen normally when we are out of disk space. Fixes bug
12352 24859; bugfix on 0.3.1.1-alpha.
12354 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
12355 - When queuing DESTROY cells on a channel, only queue the circuit-id
12356 and reason fields: not the entire 514-byte cell. This fix should
12357 help mitigate any bugs or attacks that fill up these queues, and
12358 free more RAM for other uses. Fixes bug 24666; bugfix
12361 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
12362 - When closing a connection via close_connection_immediately(), we
12363 mark it as "not blocked on bandwidth", to prevent later calls from
12364 trying to unblock it, and give it permission to read. This fixes a
12365 backtrace warning that can happen on relays under various
12366 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12368 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
12369 - When selecting relays by bandwidth, avoid a rounding error that
12370 could sometimes cause load to be imbalanced incorrectly.
12371 Previously, we would always round upwards; now, we round towards
12372 the nearest integer. This had the biggest effect when a relay's
12373 weight adjustments should have given it weight 0, but it got
12374 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12375 - When calculating the fraction of nodes that have descriptors, and
12376 all nodes in the network have zero bandwidths, count the number of
12377 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12378 - Actually log the total bandwidth in compute_weighted_bandwidths().
12379 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12381 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12382 - Improve the performance of our consensus-diff application code
12383 when Tor is built with the --enable-fragile-hardening option set.
12384 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12386 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12387 - Don't exit the Tor process if setrlimit() fails to change the file
12388 limit (which can happen sometimes on some versions of OSX). Fixes
12389 bug 21074; bugfix on 0.0.9pre5.
12391 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
12392 - Fix a bug in the bit-counting parts of our timing-wheel code on
12393 MSVC. (Note that MSVC is still not a supported build platform, due
12394 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
12397 o Minor bugfixes (relay, partial backport):
12398 - Make the internal channel_is_client() function look at what sort
12399 of connection handshake the other side used, rather than whether
12400 the other side ever sent a create_fast cell to us. Backports part
12401 of the fixes from bugs 22805 and 24898.
12403 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12404 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12406 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12407 bugfix on 0.2.9.4-alpha.
12409 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12410 - Update the "rust dependencies" submodule to be a project-level
12411 repository, rather than a user repository. Closes ticket 25323.
12414 Changes in version 0.2.9.15 - 2018-03-03
12415 Tor 0.2.9.15 backports important security and stability bugfixes from
12416 later Tor releases.
12418 It includes an important security fix for a remote crash attack
12419 against directory authorities, tracked as TROVE-2018-001.
12421 This release also backports our new system for improved resistance to
12422 denial-of-service attacks against relays.
12424 This release also fixes several minor bugs and annoyances from
12427 All directory authorities should upgrade to one of the versions
12428 released today. Relays running 0.2.9.x may wish to update to one of
12429 the versions released today, for the DoS mitigations.
12431 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12432 - Fix a protocol-list handling bug that could be used to remotely crash
12433 directory authorities with a null-pointer exception. Fixes bug 25074;
12434 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12437 o Major features (denial-of-service mitigation):
12438 - Give relays some defenses against the recent network overload. We
12439 start with three defenses (default parameters in parentheses).
12440 First: if a single client address makes too many concurrent
12441 connections (>100), hang up on further connections. Second: if a
12442 single client address makes circuits too quickly (more than 3 per
12443 second, with an allowed burst of 90) while also having too many
12444 connections open (3), refuse new create cells for the next while
12445 (1-2 hours). Third: if a client asks to establish a rendezvous
12446 point to you directly, ignore the request. These defenses can be
12447 manually controlled by new torrc options, but relays will also
12448 take guidance from consensus parameters, so there's no need to
12449 configure anything manually. Implements ticket 24902.
12451 o Major bugfixes (bootstrapping):
12452 - Fetch descriptors aggressively whenever we lack enough to build
12453 circuits, regardless of how many descriptors we are missing.
12454 Previously, we would delay launching the fetch when we had fewer
12455 than 15 missing descriptors, even if some of those descriptors
12456 were blocking circuits from building. Fixes bug 23985; bugfix on
12457 0.1.1.11-alpha. The effects of this bug became worse in
12458 0.3.0.3-alpha, when we began treating missing descriptors from our
12459 primary guards as a reason to delay circuits.
12461 o Major bugfixes (onion services, retry behavior):
12462 - Fix an "off by 2" error in counting rendezvous failures on the
12463 onion service side. While we thought we would stop the rendezvous
12464 attempt after one failed circuit, we were actually making three
12465 circuit attempts before giving up. Now switch to a default of 2,
12466 and allow the consensus parameter "hs_service_max_rdv_failures" to
12467 override. Fixes bug 24895; bugfix on 0.0.6.
12469 o Minor feature (relay statistics):
12470 - Change relay bandwidth reporting stats interval from 4 hours to 24
12471 hours in order to reduce the efficiency of guard discovery
12472 attacks. Fixes ticket 23856.
12474 o Minor features (compatibility, OpenSSL):
12475 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12476 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12477 since they neither disabled TLS 1.3 nor enabled any of the
12478 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12479 Closes ticket 24978.
12481 o Minor features (denial-of-service avoidance):
12482 - Make our OOM handler aware of the geoip client history cache so it
12483 doesn't fill up the memory. This check is important for IPv6 and
12484 our DoS mitigation subsystem. Closes ticket 25122.
12486 o Minor features (fallback directory mirrors):
12487 - The fallback directory list has been re-generated based on the
12488 current status of the network. Tor uses fallback directories to
12489 bootstrap when it doesn't yet have up-to-date directory
12490 information. Closes ticket 24801.
12491 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12492 prefer to bootstrap from fallback directory mirrors. This is a
12493 follow-up to 24679, which removed weights from the default
12494 fallbacks. Implements ticket 24681.
12496 o Minor features (geoip):
12497 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12500 o Minor features (linux seccomp2 sandbox):
12501 - Update the sandbox rules so that they should now work correctly
12502 with Glibc 2.26. Closes ticket 24315.
12504 o Minor bugfix (channel connection):
12505 - Use the actual observed address of an incoming relay connection,
12506 not the canonical address of the relay from its descriptor, when
12507 making decisions about how to handle the incoming connection.
12508 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12510 o Minor bugfix (directory authority):
12511 - Directory authorities, when refusing a descriptor from a rejected
12512 relay, now explicitly tell the relay (in its logs) to set a valid
12513 ContactInfo address and contact the bad-relays@ mailing list.
12514 Fixes bug 25170; bugfix on 0.2.9.1.
12516 o Minor bugfixes (address selection):
12517 - When the fascist_firewall_choose_address_ functions don't find a
12518 reachable address, set the returned address to the null address
12519 and port. This is a precautionary measure, because some callers do
12520 not check the return value. Fixes bug 24736; bugfix
12523 o Minor bugfixes (compilation):
12524 - Fix a signed/unsigned comparison warning introduced by our fix to
12525 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12527 o Minor bugfixes (control port, linux seccomp2 sandbox):
12528 - Avoid a crash when attempting to use the seccomp2 sandbox together
12529 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12532 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12533 - Fix a possible crash on malformed consensus. If a consensus had
12534 contained an unparseable protocol line, it could have made clients
12535 and relays crash with a null-pointer exception. To exploit this
12536 issue, however, an attacker would need to be able to subvert the
12537 directory authority system. Fixes bug 25251; bugfix on
12538 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12540 o Minor bugfixes (memory usage):
12541 - When queuing DESTROY cells on a channel, only queue the circuit-id
12542 and reason fields: not the entire 514-byte cell. This fix should
12543 help mitigate any bugs or attacks that fill up these queues, and
12544 free more RAM for other uses. Fixes bug 24666; bugfix
12547 o Minor bugfixes (network layer):
12548 - When closing a connection via close_connection_immediately(), we
12549 mark it as "not blocked on bandwidth", to prevent later calls from
12550 trying to unblock it, and give it permission to read. This fixes a
12551 backtrace warning that can happen on relays under various
12552 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12554 o Minor bugfixes (OSX):
12555 - Don't exit the Tor process if setrlimit() fails to change the file
12556 limit (which can happen sometimes on some versions of OSX). Fixes
12557 bug 21074; bugfix on 0.0.9pre5.
12559 o Minor bugfixes (path selection):
12560 - When selecting relays by bandwidth, avoid a rounding error that
12561 could sometimes cause load to be imbalanced incorrectly.
12562 Previously, we would always round upwards; now, we round towards
12563 the nearest integer. This had the biggest effect when a relay's
12564 weight adjustments should have given it weight 0, but it got
12565 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12566 - When calculating the fraction of nodes that have descriptors, and
12567 all nodes in the network have zero bandwidths, count the number of
12568 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12569 - Actually log the total bandwidth in compute_weighted_bandwidths().
12570 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12572 o Minor bugfixes (portability, msvc):
12573 - Fix a bug in the bit-counting parts of our timing-wheel code on
12574 MSVC. (Note that MSVC is still not a supported build platform, due
12575 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12578 o Minor bugfixes (relay):
12579 - Make the internal channel_is_client() function look at what sort
12580 of connection handshake the other side used, rather than whether
12581 the other side ever sent a create_fast cell to us. Backports part
12582 of the fixes from bugs 22805 and 24898.
12584 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12585 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12587 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12588 bugfix on 0.2.9.4-alpha.
12591 Changes in version 0.3.2.10 - 2018-03-03
12592 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
12593 backports a number of bugfixes, including important fixes for security
12596 It includes an important security fix for a remote crash attack
12597 against directory authorities, tracked as TROVE-2018-001.
12599 Additionally, it backports a fix for a bug whose severity we have
12600 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
12601 triggered in order to crash relays with a use-after-free pattern. As
12602 such, we are now tracking that bug as TROVE-2018-002 and
12603 CVE-2018-0491, and backporting it to earlier releases. This bug
12604 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
12607 This release also backports our new system for improved resistance to
12608 denial-of-service attacks against relays.
12610 This release also fixes several minor bugs and annoyances from
12613 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
12614 today, for the fix to TROVE-2018-002. Directory authorities should
12615 also upgrade. (Relays on earlier versions might want to update too for
12616 the DoS mitigations.)
12618 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12619 - Fix a protocol-list handling bug that could be used to remotely crash
12620 directory authorities with a null-pointer exception. Fixes bug 25074;
12621 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12624 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
12625 - Avoid adding the same channel twice in the KIST scheduler pending
12626 list, which could lead to remote denial-of-service use-after-free
12627 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
12629 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
12630 - Give relays some defenses against the recent network overload. We
12631 start with three defenses (default parameters in parentheses).
12632 First: if a single client address makes too many concurrent
12633 connections (>100), hang up on further connections. Second: if a
12634 single client address makes circuits too quickly (more than 3 per
12635 second, with an allowed burst of 90) while also having too many
12636 connections open (3), refuse new create cells for the next while
12637 (1-2 hours). Third: if a client asks to establish a rendezvous
12638 point to you directly, ignore the request. These defenses can be
12639 manually controlled by new torrc options, but relays will also
12640 take guidance from consensus parameters, so there's no need to
12641 configure anything manually. Implements ticket 24902.
12643 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
12644 - Fix an "off by 2" error in counting rendezvous failures on the
12645 onion service side. While we thought we would stop the rendezvous
12646 attempt after one failed circuit, we were actually making three
12647 circuit attempts before giving up. Now switch to a default of 2,
12648 and allow the consensus parameter "hs_service_max_rdv_failures" to
12649 override. Fixes bug 24895; bugfix on 0.0.6.
12650 - New-style (v3) onion services now obey the "max rendezvous circuit
12651 attempts" logic. Previously they would make as many rendezvous
12652 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12653 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12655 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
12656 - Add Link protocol version 5 to the supported protocols list. Fixes
12657 bug 25070; bugfix on 0.3.1.1-alpha.
12659 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
12660 - Fix a set of false positives where relays would consider
12661 connections to other relays as being client-only connections (and
12662 thus e.g. deserving different link padding schemes) if those
12663 relays fell out of the consensus briefly. Now we look only at the
12664 initial handshake and whether the connection authenticated as a
12665 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12667 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
12668 - The scheduler subsystem was failing to promptly notice changes in
12669 consensus parameters, making it harder to switch schedulers
12670 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12672 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
12673 - Make our OOM handler aware of the geoip client history cache so it
12674 doesn't fill up the memory. This check is important for IPv6 and
12675 our DoS mitigation subsystem. Closes ticket 25122.
12677 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
12678 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12679 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12680 since they neither disabled TLS 1.3 nor enabled any of the
12681 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12682 Closes ticket 24978.
12684 o Minor features (geoip):
12685 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12688 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
12689 - When logging a failure to create an onion service's descriptor,
12690 also log what the problem with the descriptor was. Diagnostic
12693 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12694 - Use the actual observed address of an incoming relay connection,
12695 not the canonical address of the relay from its descriptor, when
12696 making decisions about how to handle the incoming connection.
12697 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12699 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12700 - Fix a possible crash on malformed consensus. If a consensus had
12701 contained an unparseable protocol line, it could have made clients
12702 and relays crash with a null-pointer exception. To exploit this
12703 issue, however, an attacker would need to be able to subvert the
12704 directory authority system. Fixes bug 25251; bugfix on
12705 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12707 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12708 - Directory authorities, when refusing a descriptor from a rejected
12709 relay, now explicitly tell the relay (in its logs) to set a valid
12710 ContactInfo address and contact the bad-relays@ mailing list.
12711 Fixes bug 25170; bugfix on 0.2.9.1.
12713 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
12714 - When building with Rust on OSX, link against libresolv, to work
12715 around the issue at https://github.com/rust-lang/rust/issues/46797.
12716 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12718 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
12719 - Remove a BUG() statement when a client fetches an onion descriptor
12720 that has a lower revision counter than the one in its cache. This
12721 can happen in normal circumstances due to HSDir desync. Fixes bug
12722 24976; bugfix on 0.3.2.1-alpha.
12724 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12725 - Don't treat inability to store a cached consensus object as a bug:
12726 it can happen normally when we are out of disk space. Fixes bug
12727 24859; bugfix on 0.3.1.1-alpha.
12729 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12730 - Improve the performance of our consensus-diff application code
12731 when Tor is built with the --enable-fragile-hardening option set.
12732 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12734 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12735 - Don't exit the Tor process if setrlimit() fails to change the file
12736 limit (which can happen sometimes on some versions of OSX). Fixes
12737 bug 21074; bugfix on 0.0.9pre5.
12739 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12740 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12742 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12743 bugfix on 0.2.9.4-alpha.
12745 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
12746 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12747 25005; bugfix on 0.3.2.7-rc.
12749 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
12750 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12751 version, when deciding whether a consensus entry can support the
12752 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12753 bugfix on 0.3.2.1-alpha.
12755 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12756 - Update the "rust dependencies" submodule to be a project-level
12757 repository, rather than a user repository. Closes ticket 25323.
12759 o Documentation (backport from 0.3.3.1-alpha)
12760 - Document that operators who run more than one relay or bridge are
12761 expected to set MyFamily and ContactInfo correctly. Closes
12765 Changes in version 0.3.3.3-alpha - 2018-03-03
12766 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
12767 It includes an important security fix for a remote crash attack
12768 against directory authorities tracked as TROVE-2018-001.
12770 Additionally, with this release, we are upgrading the severity of a
12771 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
12772 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
12773 a use-after-free pattern. As such, we are now tracking that bug as
12774 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
12775 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
12777 This release also fixes several minor bugs and annoyances from
12780 Relays running 0.3.2.x should upgrade to one of the versions released
12781 today, for the fix to TROVE-2018-002. Directory authorities should
12782 also upgrade. (Relays on earlier versions might want to update too for
12783 the DoS mitigations.)
12785 o Major bugfixes (denial-of-service, directory authority):
12786 - Fix a protocol-list handling bug that could be used to remotely crash
12787 directory authorities with a null-pointer exception. Fixes bug 25074;
12788 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12791 o Minor features (compatibility, OpenSSL):
12792 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12793 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12794 since they neither disabled TLS 1.3 nor enabled any of the
12795 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12796 Closes ticket 24978.
12798 o Minor features (logging):
12799 - Clarify the log messages produced when getrandom() or a related
12800 entropy-generation mechanism gives an error. Closes ticket 25120.
12802 o Minor features (testing):
12803 - Add a "make test-rust" target to run the rust tests only. Closes
12806 o Minor bugfixes (denial-of-service):
12807 - Fix a possible crash on malformed consensus. If a consensus had
12808 contained an unparseable protocol line, it could have made clients
12809 and relays crash with a null-pointer exception. To exploit this
12810 issue, however, an attacker would need to be able to subvert the
12811 directory authority system. Fixes bug 25251; bugfix on
12812 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12814 o Minor bugfixes (DoS mitigation):
12815 - Add extra safety checks when refilling the circuit creation bucket
12816 to ensure we never set a value above the allowed maximum burst.
12817 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
12818 - When a new consensus arrives, don't update our DoS-mitigation
12819 parameters if we aren't a public relay. Fixes bug 25223; bugfix
12822 o Minor bugfixes (man page, SocksPort):
12823 - Remove dead code from the old "SocksSocket" option, and rename
12824 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
12825 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
12827 o Minor bugfixes (performance):
12828 - Reduce the number of circuits that will be opened at once during
12829 the circuit build timeout phase. This is done by increasing the
12830 idle timeout to 3 minutes, and lowering the maximum number of
12831 concurrent learning circuits to 10. Fixes bug 24769; bugfix
12834 o Minor bugfixes (spec conformance):
12835 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12837 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12838 bugfix on 0.2.9.4-alpha.
12840 o Minor bugfixes (spec conformance, rust):
12841 - Resolve a denial-of-service issue caused by an infinite loop in
12842 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
12843 Also tracked as TROVE-2018-003.
12845 o Code simplification and refactoring:
12846 - Update the "rust dependencies" submodule to be a project-level
12847 repository, rather than a user repository. Closes ticket 25323.
12850 Changes in version 0.3.3.2-alpha - 2018-02-10
12851 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
12852 introduces a mechanism to handle the high loads that many relay
12853 operators have been reporting recently. It also fixes several bugs in
12854 older releases. If this new code proves reliable, we plan to backport
12855 it to older supported release series.
12857 o Major features (denial-of-service mitigation):
12858 - Give relays some defenses against the recent network overload. We
12859 start with three defenses (default parameters in parentheses).
12860 First: if a single client address makes too many concurrent
12861 connections (>100), hang up on further connections. Second: if a
12862 single client address makes circuits too quickly (more than 3 per
12863 second, with an allowed burst of 90) while also having too many
12864 connections open (3), refuse new create cells for the next while
12865 (1-2 hours). Third: if a client asks to establish a rendezvous
12866 point to you directly, ignore the request. These defenses can be
12867 manually controlled by new torrc options, but relays will also
12868 take guidance from consensus parameters, so there's no need to
12869 configure anything manually. Implements ticket 24902.
12871 o Major bugfixes (netflow padding):
12872 - Stop adding unneeded channel padding right after we finish
12873 flushing to a connection that has been trying to flush for many
12874 seconds. Instead, treat all partial or complete flushes as
12875 activity on the channel, which will defer the time until we need
12876 to add padding. This fix should resolve confusing and scary log
12877 messages like "Channel padding timeout scheduled 221453ms in the
12878 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
12880 o Major bugfixes (protocol versions):
12881 - Add Link protocol version 5 to the supported protocols list. Fixes
12882 bug 25070; bugfix on 0.3.1.1-alpha.
12884 o Major bugfixes (scheduler, consensus):
12885 - The scheduler subsystem was failing to promptly notice changes in
12886 consensus parameters, making it harder to switch schedulers
12887 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12889 o Minor features (denial-of-service avoidance):
12890 - Make our OOM handler aware of the geoip client history cache so it
12891 doesn't fill up the memory. This check is important for IPv6 and
12892 our DoS mitigation subsystem. Closes ticket 25122.
12894 o Minor features (directory authority):
12895 - When directory authorities are unable to add signatures to a
12896 pending consensus, log the reason why. Closes ticket 24849.
12898 o Minor features (geoip):
12899 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12902 o Minor features (logging, diagnostic):
12903 - When logging a failure to create an onion service's descriptor,
12904 also log what the problem with the descriptor was. Diagnostic for
12907 o Minor bugfix (channel connection):
12908 - Use the actual observed address of an incoming relay connection,
12909 not the canonical address of the relay from its descriptor, when
12910 making decisions about how to handle the incoming connection.
12911 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12913 o Minor bugfix (directory authority):
12914 - Directory authorities, when refusing a descriptor from a rejected
12915 relay, now explicitly tell the relay (in its logs) to set a valid
12916 ContactInfo address and contact the bad-relays@ mailing list.
12917 Fixes bug 25170; bugfix on 0.2.9.1.
12919 o Minor bugfixes (all versions of Tor):
12920 - Use the "misspell" tool to detect and fix typos throughout the
12921 source code. Fixes bug 23650; bugfix on various versions of Tor.
12922 Patch from Deepesh Pathak.
12924 o Minor bugfixes (circuit, cannibalization):
12925 - Don't cannibalize preemptively-built circuits if we no longer
12926 recognize their first hop. This situation can happen if our Guard
12927 relay went off the consensus after the circuit was created. Fixes
12928 bug 24469; bugfix on 0.0.6.
12930 o Minor bugfixes (correctness):
12931 - Remove a nonworking, unnecessary check to see whether a circuit
12932 hop's identity digest was set when the circuit failed. Fixes bug
12933 24927; bugfix on 0.2.4.4-alpha.
12935 o Minor bugfixes (logging):
12936 - Don't treat inability to store a cached consensus object as a bug:
12937 it can happen normally when we are out of disk space. Fixes bug
12938 24859; bugfix on 0.3.1.1-alpha.
12939 - Fix a (mostly harmless) race condition when invoking
12940 LOG_PROTOCOL_WARN message from a subthread while the torrc options
12941 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
12943 o Minor bugfixes (onion services):
12944 - Remove a BUG() statement when a client fetches an onion descriptor
12945 that has a lower revision counter than the one in its cache. This
12946 can happen in normal circumstances due to HSDir desync. Fixes bug
12947 24976; bugfix on 0.3.2.1-alpha.
12948 - If we are configured to offer a single onion service, don't log
12949 long-term established one hop rendezvous points in the heartbeat.
12950 Fixes bug 25116; bugfix on 0.2.9.6-rc.
12952 o Minor bugfixes (performance):
12953 - Avoid calling protocol_list_supports_protocol() from inside tight
12954 loops when running with cached routerinfo_t objects. Instead,
12955 summarize the relevant protocols as flags in the routerinfo_t, as
12956 we do for routerstatus_t objects. This change simplifies our code
12957 a little, and saves a large amount of short-term memory allocation
12958 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
12960 o Minor bugfixes (Rust FFI):
12961 - Fix a minor memory leak which would happen whenever the C code
12962 would call the Rust implementation of
12963 protover_get_supported_protocols(). This was due to the C version
12964 returning a static string, whereas the Rust version newly allocated
12965 a CString to pass across the FFI boundary. Consequently, the C
12966 code was not expecting to need to free() what it was given. Fixes
12967 bug 25127; bugfix on 0.3.2.1-alpha.
12969 o Minor bugfixes (scheduler, KIST):
12970 - Avoid adding the same channel twice in the KIST scheduler pending
12971 list, which would waste CPU cycles. Fixes bug 24700; bugfix
12974 o Minor bugfixes (unit test, monotonic time):
12975 - Increase a constant (1msec to 10msec) in the monotonic time test
12976 that makes sure the nsec/usec/msec times read are synchronized.
12977 This change was needed to accommodate slow systems like armel or
12978 when the clock_gettime() is not a VDSO on the running kernel.
12979 Fixes bug 25113; bugfix on 0.2.9.1.
12981 o Minor bugfixes (v3 onion services):
12982 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12983 version, when deciding whether a consensus entry can support the
12984 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12985 bugfix on 0.3.2.1-alpha.
12987 o Code simplification and refactoring:
12988 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
12990 - Remove a series of counters used to track circuit extend attempts
12991 and connection status but that in reality we aren't using for
12992 anything other than stats logged by a SIGUSR1 signal. Closes
12995 o Documentation (man page):
12996 - The HiddenServiceVersion torrc option accepts only one number:
12997 either version 2 or 3. Closes ticket 25026; bugfix
13001 Changes in version 0.3.3.1-alpha - 2018-01-25
13002 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
13003 several new features to Tor, including several improvements to
13004 bootstrapping, and support for an experimental "vanguards" feature to
13005 resist guard discovery attacks. This series also includes better
13006 support for applications that need to embed Tor or manage v3
13009 o Major features (embedding):
13010 - There is now a documented stable API for programs that need to
13011 embed Tor. See tor_api.h for full documentation and known bugs.
13012 Closes ticket 23684.
13013 - Tor now has support for restarting in the same process.
13014 Controllers that run Tor using the "tor_api.h" interface can now
13015 restart Tor after Tor has exited. This support is incomplete,
13016 however: we fixed crash bugs that prevented it from working at
13017 all, but many bugs probably remain, including a possibility of
13018 security issues. Implements ticket 24581.
13020 o Major features (IPv6, directory documents):
13021 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
13022 consensus. This information makes it easier for IPv6 clients to
13023 bootstrap and choose reachable entry guards. Implements ticket 23826.
13024 - Add consensus method 28, which removes IPv6 ORPorts from
13025 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
13026 are redundant in microdescs. This change will be used by Tor clients
13027 on 0.2.8.x and later. (That is to say, with all Tor clients that
13028 have IPv6 bootstrap and guard support.) Implements ticket 23828.
13029 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
13030 set by different numbers of authorities. Fixes 23870
13033 o Major features (onion service v3, control port):
13034 - The control port now supports commands and events for v3 onion
13035 services. It is now possible to create ephemeral v3 services using
13036 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
13037 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
13038 DEL_ONION) have been extended to support v3 onion services. Closes
13039 ticket 20699; implements proposal 284.
13041 o Major features (onion services):
13042 - Provide torrc options to pin the second and third hops of onion
13043 service circuits to a list of nodes. The option HSLayer2Guards
13044 pins the second hop, and the option HSLayer3Guards pins the third
13045 hop. These options are for use in conjunction with experiments
13046 with "vanguards" for preventing guard enumeration attacks. Closes
13049 o Major features (rust, portability, experimental):
13050 - Tor now ships with an optional implementation of one of its
13051 smaller modules (protover.c) in the Rust programming language. To
13052 try it out, install a Rust build environment, and configure Tor
13053 with "--enable-rust --enable-cargo-online-mode". This should not
13054 cause any user-visible changes, but should help us gain more
13055 experience with Rust, and plan future Rust integration work.
13056 Implementation by Chelsea Komlo. Closes ticket 22840.
13058 o Minor features (storage, configuration):
13059 - Users can store cached directory documents somewhere other than
13060 the DataDirectory by using the CacheDirectory option. Similarly,
13061 the storage location for relay's keys can be overridden with the
13062 KeyDirectory option. Closes ticket 22703.
13064 o Major features (v3 onion services, ipv6):
13065 - When v3 onion service clients send introduce cells, they now
13066 include the IPv6 address of the rendezvous point, if it has one.
13067 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
13068 in future Tor versions, IPv6-only v3 single onion services will be
13069 able to use IPv6 addresses to connect directly to the rendezvous
13070 point. Closes ticket 23577. Patch by Neel Chauhan.
13072 o Major bugfixes (onion services, retry behavior):
13073 - Fix an "off by 2" error in counting rendezvous failures on the
13074 onion service side. While we thought we would stop the rendezvous
13075 attempt after one failed circuit, we were actually making three
13076 circuit attempts before giving up. Now switch to a default of 2,
13077 and allow the consensus parameter "hs_service_max_rdv_failures" to
13078 override. Fixes bug 24895; bugfix on 0.0.6.
13079 - New-style (v3) onion services now obey the "max rendezvous circuit
13080 attempts" logic. Previously they would make as many rendezvous
13081 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
13082 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
13084 o Major bugfixes (relays):
13085 - Fix a set of false positives where relays would consider
13086 connections to other relays as being client-only connections (and
13087 thus e.g. deserving different link padding schemes) if those
13088 relays fell out of the consensus briefly. Now we look only at the
13089 initial handshake and whether the connection authenticated as a
13090 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
13092 o Minor feature (IPv6):
13093 - Make IPv6-only clients wait for microdescs for relays, even if we
13094 were previously using descriptors (or were using them as a bridge)
13095 and have a cached descriptor for them. Implements ticket 23827.
13096 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
13097 them, rather than waiting to download microdescriptors.
13098 Implements ticket 23827.
13100 o Minor features (cleanup):
13101 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
13102 when it stops. Closes ticket 23271.
13104 o Minor features (defensive programming):
13105 - Most of the functions in Tor that free objects have been replaced
13106 with macros that free the objects and set the corresponding
13107 pointers to NULL. This change should help prevent a large class of
13108 dangling pointer bugs. Closes ticket 24337.
13109 - Where possible, the tor_free() macro now only evaluates its input
13110 once. Part of ticket 24337.
13111 - Check that microdesc ed25519 ids are non-zero in
13112 node_get_ed25519_id() before returning them. Implements ticket
13113 24001, patch by "aruna1234".
13115 o Minor features (embedding):
13116 - Tor can now start with a preauthenticated control connection
13117 created by the process that launched it. This feature is meant for
13118 use by programs that want to launch and manage a Tor process
13119 without allowing other programs to manage it as well. For more
13120 information, see the __OwningControllerFD option documented in
13121 control-spec.txt. Closes ticket 23900.
13122 - On most errors that would cause Tor to exit, it now tries to
13123 return from the tor_main() function, rather than calling the
13124 system exit() function. Most users won't notice a difference here,
13125 but it should be significant for programs that run Tor inside
13126 a separate thread: they should now be able to survive Tor's exit
13127 conditions rather than having Tor shut down the entire process.
13128 Closes ticket 23848.
13129 - Applications that want to embed Tor can now tell Tor not to
13130 register any of its own POSIX signal handlers, using the
13131 __DisableSignalHandlers option. Closes ticket 24588.
13133 o Minor features (fallback directory list):
13134 - Avoid selecting fallbacks that change their IP addresses too
13135 often. Select more fallbacks by ignoring the Guard flag, and
13136 allowing lower cutoffs for the Running and V2Dir flags. Also allow
13137 a lower bandwidth, and a higher number of fallbacks per operator
13138 (5% of the list). Implements ticket 24785.
13139 - Update the fallback whitelist and blacklist based on opt-ins and
13140 relay changes. Closes tickets 22321, 24678, 22527, 24135,
13143 o Minor features (fallback directory mirror configuration):
13144 - Add a nickname to each fallback in a C comment. This makes it
13145 easier for operators to find their relays, and allows stem to use
13146 nicknames to identify fallbacks. Implements ticket 24600.
13147 - Add a type and version header to the fallback directory mirror
13148 file. Also add a delimiter to the end of each fallback entry. This
13149 helps external parsers like stem and Relay Search. Implements
13151 - Add an extrainfo cache flag for each fallback in a C comment. This
13152 allows stem to use fallbacks to fetch extra-info documents, rather
13153 than using authorities. Implements ticket 22759.
13154 - Add the generateFallbackDirLine.py script for automatically
13155 generating fallback directory mirror lines from relay fingerprints.
13156 No more typos! Add the lookupFallbackDirContact.py script for
13157 automatically looking up operator contact info from relay
13158 fingerprints. Implements ticket 24706, patch by teor and atagar.
13159 - Reject any fallback directory mirror that serves an expired
13160 consensus. Implements ticket 20942, patch by "minik".
13161 - Remove commas and equals signs from external string inputs to the
13162 fallback list. This avoids format confusion attacks. Implements
13164 - Remove the "weight=10" line from fallback directory mirror
13165 entries. Ticket 24681 will maintain the current fallback weights
13166 by changing Tor's default fallback weight to 10. Implements
13168 - Stop logging excessive information about fallback netblocks.
13169 Implements ticket 24791.
13171 o Minor features (forward-compatibility):
13172 - If a relay supports some link authentication protocol that we do
13173 not recognize, then include that relay's ed25519 key when telling
13174 other relays to extend to it. Previously, we treated future
13175 versions as if they were too old to support ed25519 link
13176 authentication. Closes ticket 20895.
13178 o Minor features (heartbeat):
13179 - Add onion service information to our heartbeat logs, displaying
13180 stats about the activity of configured onion services. Closes
13183 o Minor features (instrumentation, development):
13184 - Add the MainloopStats option to allow developers to get
13185 instrumentation information from the main event loop via the
13186 heartbeat messages. We hope to use this to improve Tor's behavior
13187 when it's trying to sleep. Closes ticket 24605.
13189 o Minor features (log messages):
13190 - Improve a warning message that happens when we fail to re-parse an
13191 old router because of an expired certificate. Closes ticket 20020.
13192 - Make the log more quantitative when we hit MaxMemInQueues
13193 threshold exposing some values. Closes ticket 24501.
13195 o Minor features (logging, android):
13196 - Added support for the Android logging subsystem. Closes
13199 o Minor features (performance):
13200 - Support predictive circuit building for onion service circuits
13201 with multiple layers of guards. Closes ticket 23101.
13202 - Use stdatomic.h where available, rather than mutexes, to implement
13203 atomic_counter_t. Closes ticket 23953.
13205 o Minor features (performance, 32-bit):
13206 - Improve performance on 32-bit systems by avoiding 64-bit division
13207 when calculating the timestamp in milliseconds for channel padding
13208 computations. Implements ticket 24613.
13209 - Improve performance on 32-bit systems by avoiding 64-bit division
13210 when timestamping cells and buffer chunks for OOM calculations.
13211 Implements ticket 24374.
13213 o Minor features (performance, OSX, iOS):
13214 - Use the mach_approximate_time() function (when available) to
13215 implement coarse monotonic time. Having a coarse time function
13216 should avoid a large number of system calls, and improve
13217 performance slightly, especially under load. Closes ticket 24427.
13219 o Minor features (performance, windows):
13220 - Improve performance on Windows Vista and Windows 7 by adjusting
13221 TCP send window size according to the recommendation from
13222 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
13225 o Major features (relay):
13226 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
13227 operator to use a more reasonable ("reduced") exit policy, rather
13228 than the default one. If you want to run an exit node without
13229 thinking too hard about which ports to allow, this one is for you.
13230 Closes ticket 13605. Patch from Neel Chauhan.
13232 o Minor features (testing, debugging, embedding):
13233 - For development purposes, Tor now has a mode in which it runs for
13234 a few seconds, then stops, and starts again without exiting the
13235 process. This mode is meant to help us debug various issues with
13236 ticket 23847. To use this feature, compile with
13237 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
13238 environment variable. This is expected to crash a lot, and is
13239 really meant for developers only. It will likely be removed in a
13240 future release. Implements ticket 24583.
13242 o Minor bugfix (network IPv6 test):
13243 - Tor's test scripts now check if "ping -6 ::1" works when the user
13244 runs "make test-network-all". Fixes bug 24677; bugfix on
13245 0.2.9.3-alpha. Patch by "ffmancera".
13247 o Minor bugfixes (build, rust):
13248 - Fix output of autoconf checks to display success messages for Rust
13249 dependencies and a suitable rustc compiler version. Fixes bug
13250 24612; bugfix on 0.3.1.3-alpha.
13251 - When building with Rust on OSX, link against libresolv, to work
13252 around the issue at https://github.com/rust-lang/rust/issues/46797.
13253 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
13254 - Don't pass the --quiet option to cargo: it seems to suppress some
13255 errors, which is not what we want to do when building. Fixes bug
13256 24518; bugfix on 0.3.1.7.
13257 - Build correctly when building from outside Tor's source tree with
13258 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
13261 o Minor bugfixes (directory authorities, IPv6):
13262 - When creating a routerstatus (vote) from a routerinfo (descriptor),
13263 set the IPv6 address to the unspecified IPv6 address, and
13264 explicitly initialize the port to zero. Fixes bug 24488; bugfix
13267 o Minor bugfixes (fallback directory mirrors):
13268 - Make updateFallbackDirs.py search harder for python. (Some OSs
13269 don't put it in /usr/bin.) Fixes bug 24708; bugfix
13272 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
13273 - When hibernating, close connections normally and allow them to
13274 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
13276 - Do not attempt to launch self-reachability tests when entering
13277 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
13278 - Resolve several bugs related to descriptor fetching on bridge
13279 clients with bandwidth accounting enabled. (This combination is
13280 not recommended!) Fixes a case of bug 12062; bugfix
13282 - When hibernating, do not attempt to launch DNS checks. Fixes a
13283 case of bug 12062; bugfix on 0.1.2.2-alpha.
13284 - When hibernating, do not try to upload or download descriptors.
13285 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
13287 o Minor bugfixes (IPv6, bridges):
13288 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
13289 bugfix on 0.2.8.2-alpha.
13290 - Tor now sets IPv6 address in the routerstatus as well as in the
13291 router descriptors when updating addresses for a bridge. Closes
13292 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
13294 o Minor bugfixes (linux seccomp2 sandbox):
13295 - When running with the sandbox enabled, reload configuration files
13296 correctly even when %include was used. Previously we would crash.
13297 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
13299 o Minor bugfixes (memory leaks):
13300 - Avoid possible at-exit memory leaks related to use of Libevent's
13301 event_base_once() function. (This function tends to leak memory if
13302 the event_base is closed before the event fires.) Fixes bug 24584;
13303 bugfix on 0.2.8.1-alpha.
13304 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
13307 o Minor bugfixes (OSX):
13308 - Don't exit the Tor process if setrlimit() fails to change the file
13309 limit (which can happen sometimes on some versions of OSX). Fixes
13310 bug 21074; bugfix on 0.0.9pre5.
13312 o Minor bugfixes (performance, fragile-hardening):
13313 - Improve the performance of our consensus-diff application code
13314 when Tor is built with the --enable-fragile-hardening option set.
13315 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
13317 o Minor bugfixes (performance, timeouts):
13318 - Consider circuits for timeout as soon as they complete a hop. This
13319 is more accurate than applying the timeout in
13320 circuit_expire_building() because that function is only called
13321 once per second, which is now too slow for typical timeouts on the
13322 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
13323 - Use onion service circuits (and other circuits longer than 3 hops)
13324 to calculate a circuit build timeout. Previously, Tor only
13325 calculated its build timeout based on circuits that planned to be
13326 exactly 3 hops long. With this change, we include measurements
13327 from all circuits at the point where they complete their third
13328 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
13330 o Minor bugfixes (testing):
13331 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
13332 bugfix on 0.2.3.1-alpha.
13333 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
13334 25005; bugfix on 0.3.2.7-rc.
13336 o Code simplification and refactoring:
13337 - Remove /usr/athena from search path in configure.ac. Closes
13339 - Remove duplicate code in node_has_curve25519_onion_key() and
13340 node_get_curve25519_onion_key(), and add a check for a zero
13341 microdesc curve25519 onion key. Closes ticket 23966, patch by
13342 "aruna1234" and teor.
13343 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
13344 memory allocations with large numbers of OR connections (e.g.
13345 relays). Closes ticket 24119.
13346 - Separate the function that deletes ephemeral files when Tor
13348 - Small changes to Tor's buf_t API to make it suitable for use as a
13349 general-purpose safe string constructor. Closes ticket 22342.
13350 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
13351 avoid source code identifier confusion. Closes ticket 24467.
13352 - The tor_git_revision[] constant no longer needs to be redeclared
13353 by everything that links against the rest of Tor. Done as part of
13354 ticket 23845, to simplify our external API.
13355 - We make extend_info_from_node() use node_get_curve25519_onion_key()
13356 introduced in ticket 23577 to access the curve25519 public keys
13357 rather than accessing it directly. Closes ticket 23760. Patch by
13359 - Add a function to log channels' scheduler state changes to aid
13360 debugging efforts. Closes ticket 24531.
13363 - Add documentation on how to build tor with Rust dependencies
13364 without having to be online. Closes ticket 22907; bugfix
13366 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
13367 traffic. Closes ticket 24318.
13368 - Document that OutboundBindAddress doesn't apply to DNS requests.
13369 Closes ticket 22145. Patch from Aruna Maurya.
13370 - Document that operators who run more than one relay or bridge are
13371 expected to set MyFamily and ContactInfo correctly. Closes
13374 o Code simplification and refactoring (channels):
13375 - Remove the incoming and outgoing channel queues. These were never
13376 used, but still took up a step in our fast path.
13377 - The majority of the channel unit tests have been rewritten and the
13378 code coverage has now been raised to 83.6% for channel.c. Closes
13380 - Remove other dead code from the channel subsystem: All together,
13381 this cleanup has removed more than 1500 lines of code overall and
13382 adding very little except for unit test.
13384 o Code simplification and refactoring (circuit rendezvous):
13385 - Split the client-side rendezvous circuit lookup into two
13386 functions: one that returns only established circuits and another
13387 that returns all kinds of circuits. Closes ticket 23459.
13389 o Code simplification and refactoring (controller):
13390 - Make most of the variables in networkstatus_getinfo_by_purpose()
13391 const. Implements ticket 24489.
13394 Changes in version 0.3.2.9 - 2018-01-09
13395 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
13397 The 0.3.2 series includes our long-anticipated new onion service
13398 design, with numerous security features. (For more information, see
13399 our blog post at https://blog.torproject.org/fall-harvest.) We also
13400 have a new circuit scheduler algorithm for improved performance on
13401 relays everywhere (see https://blog.torproject.org/kist-and-tell),
13402 along with many smaller features and bugfixes.
13404 Per our stable release policy, we plan to support each stable release
13405 series for at least the next nine months, or for three months after
13406 the first stable release of the next series: whichever is longer. If
13407 you need a release with long-term support, we recommend that you stay
13408 with the 0.2.9 series.
13410 Below is a list of the changes since 0.3.2.8-rc. For a list of all
13411 changes since 0.3.1, see the ReleaseNotes file.
13413 o Minor features (fallback directory mirrors):
13414 - The fallback directory list has been re-generated based on the
13415 current status of the network. Tor uses fallback directories to
13416 bootstrap when it doesn't yet have up-to-date directory
13417 information. Closes ticket 24801.
13418 - Make the default DirAuthorityFallbackRate 0.1, so that clients
13419 prefer to bootstrap from fallback directory mirrors. This is a
13420 follow-up to 24679, which removed weights from the default
13421 fallbacks. Implements ticket 24681.
13423 o Minor features (geoip):
13424 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
13427 o Minor bugfixes (address selection):
13428 - When the fascist_firewall_choose_address_ functions don't find a
13429 reachable address, set the returned address to the null address
13430 and port. This is a precautionary measure, because some callers do
13431 not check the return value. Fixes bug 24736; bugfix
13434 o Minor bugfixes (compilation):
13435 - Resolve a few shadowed-variable warnings in the onion service
13436 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
13438 o Minor bugfixes (portability, msvc):
13439 - Fix a bug in the bit-counting parts of our timing-wheel code on
13440 MSVC. (Note that MSVC is still not a supported build platform, due
13441 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
13445 Changes in version 0.3.2.8-rc - 2017-12-21
13446 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
13447 schedulers that had led servers under heavy load to overload their
13448 outgoing connections. All relay operators running earlier 0.3.2.x
13449 versions should upgrade. This version also includes a mitigation for
13450 over-full DESTROY queues leading to out-of-memory conditions: if it
13451 works, we will soon backport it to earlier release series.
13453 This is the second release candidate in the 0.3.2 series. If we find
13454 no new bugs or regression here, then the first stable 0.3.2 release
13455 will be nearly identical to this.
13457 o Major bugfixes (KIST, scheduler):
13458 - The KIST scheduler did not correctly account for data already
13459 enqueued in each connection's send socket buffer, particularly in
13460 cases when the TCP/IP congestion window was reduced between
13461 scheduler calls. This situation lead to excessive per-connection
13462 buffering in the kernel, and a potential memory DoS. Fixes bug
13463 24665; bugfix on 0.3.2.1-alpha.
13465 o Minor features (geoip):
13466 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
13469 o Minor bugfixes (hidden service v3):
13470 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
13471 the probability of reaching a service for a client missing
13472 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
13474 o Minor bugfixes (memory usage):
13475 - When queuing DESTROY cells on a channel, only queue the circuit-id
13476 and reason fields: not the entire 514-byte cell. This fix should
13477 help mitigate any bugs or attacks that fill up these queues, and
13478 free more RAM for other uses. Fixes bug 24666; bugfix
13481 o Minor bugfixes (scheduler, KIST):
13482 - Use a sane write limit for KISTLite when writing onto a connection
13483 buffer instead of using INT_MAX and shoving as much as it can.
13484 Because the OOM handler cleans up circuit queues, we are better
13485 off at keeping them in that queue instead of the connection's
13486 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
13489 Changes in version 0.3.2.7-rc - 2017-12-14
13490 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
13491 including some that could affect reliability or correctness.
13493 This is the first release candidate in the 0.3.2 series. If we find no
13494 new bugs or regression here, then the first stable 0.3.2. release will
13495 be nearly identical to this.
13497 o Major bugfixes (circuit prediction):
13498 - Fix circuit prediction logic so that a client doesn't treat a port
13499 as being "handled" by a circuit if that circuit already has
13500 isolation settings on it. This change should make Tor clients more
13501 responsive by improving their chances of having a pre-created
13502 circuit ready for use when a request arrives. Fixes bug 18859;
13503 bugfix on 0.2.3.3-alpha.
13505 o Minor features (logging):
13506 - Provide better warnings when the getrandom() syscall fails. Closes
13509 o Minor features (portability):
13510 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
13511 (It doesn't yet work with the sandbox enabled.) Closes
13514 o Minor bugfixes (bridge clients, bootstrap):
13515 - Retry directory downloads when we get our first bridge descriptor
13516 during bootstrap or while reconnecting to the network. Keep
13517 retrying every time we get a bridge descriptor, until we have a
13518 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
13519 - Stop delaying bridge descriptor fetches when we have cached bridge
13520 descriptors. Instead, only delay bridge descriptor fetches when we
13521 have at least one reachable bridge. Fixes part of bug 24367;
13522 bugfix on 0.2.0.3-alpha.
13523 - Stop delaying directory fetches when we have cached bridge
13524 descriptors. Instead, only delay bridge descriptor fetches when
13525 all our bridges are definitely unreachable. Fixes part of bug
13526 24367; bugfix on 0.2.0.3-alpha.
13528 o Minor bugfixes (compilation):
13529 - Fix a signed/unsigned comparison warning introduced by our fix to
13530 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
13532 o Minor bugfixes (correctness):
13533 - Fix several places in our codebase where a C compiler would be
13534 likely to eliminate a check, based on assuming that undefined
13535 behavior had not happened elsewhere in the code. These cases are
13536 usually a sign of redundant checking or dubious arithmetic. Found
13537 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
13538 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
13541 o Minor bugfixes (onion service v3):
13542 - Fix a race where an onion service would launch a new intro circuit
13543 after closing an old one, but fail to register it before freeing
13544 the previously closed circuit. This bug was making the service
13545 unable to find the established intro circuit and thus not upload
13546 its descriptor, thus making a service unavailable for up to 24
13547 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
13549 o Minor bugfixes (scheduler, KIST):
13550 - Properly set the scheduler state of an unopened channel in the
13551 KIST scheduler main loop. This prevents a harmless but annoying
13552 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
13553 - Avoid a possible integer overflow when computing the available
13554 space on the TCP buffer of a channel. This had no security
13555 implications; but could make KIST allow too many cells on a
13556 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
13557 - Downgrade to "info" a harmless warning about the monotonic time
13558 moving backwards: This can happen on platform not supporting
13559 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13562 Changes in version 0.3.2.6-alpha - 2017-12-01
13563 This version of Tor is the latest in the 0.3.2 alpha series. It
13564 includes fixes for several important security issues. All Tor users
13565 should upgrade to this release, or to one of the other releases coming
13568 o Major bugfixes (security):
13569 - Fix a denial of service bug where an attacker could use a
13570 malformed directory object to cause a Tor instance to pause while
13571 OpenSSL would try to read a passphrase from the terminal. (Tor
13572 instances run without a terminal, which is the case for most Tor
13573 packages, are not impacted.) Fixes bug 24246; bugfix on every
13574 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13575 Found by OSS-Fuzz as testcase 6360145429790720.
13576 - Fix a denial of service issue where an attacker could crash a
13577 directory authority using a malformed router descriptor. Fixes bug
13578 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13580 - When checking for replays in the INTRODUCE1 cell data for a
13581 (legacy) onion service, correctly detect replays in the RSA-
13582 encrypted part of the cell. We were previously checking for
13583 replays on the entire cell, but those can be circumvented due to
13584 the malleability of Tor's legacy hybrid encryption. This fix helps
13585 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13586 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13589 o Major bugfixes (security, onion service v2):
13590 - Fix a use-after-free error that could crash v2 Tor onion services
13591 when they failed to open circuits while expiring introduction
13592 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13593 also tracked as TROVE-2017-013 and CVE-2017-8823.
13595 o Major bugfixes (security, relay):
13596 - When running as a relay, make sure that we never build a path
13597 through ourselves, even in the case where we have somehow lost the
13598 version of our descriptor appearing in the consensus. Fixes part
13599 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13600 as TROVE-2017-012 and CVE-2017-8822.
13601 - When running as a relay, make sure that we never choose ourselves
13602 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13603 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13605 o Minor feature (relay statistics):
13606 - Change relay bandwidth reporting stats interval from 4 hours to 24
13607 hours in order to reduce the efficiency of guard discovery
13608 attacks. Fixes ticket 23856.
13610 o Minor features (directory authority):
13611 - Add an IPv6 address for the "bastet" directory authority. Closes
13614 o Minor bugfixes (client):
13615 - By default, do not enable storage of client-side DNS values. These
13616 values were unused by default previously, but they should not have
13617 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
13620 Changes in version 0.3.1.9 - 2017-12-01:
13621 Tor 0.3.1.9 backports important security and stability fixes from the
13622 0.3.2 development series. All Tor users should upgrade to this
13623 release, or to another of the releases coming out today.
13625 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13626 - Fix a denial of service bug where an attacker could use a
13627 malformed directory object to cause a Tor instance to pause while
13628 OpenSSL would try to read a passphrase from the terminal. (Tor
13629 instances run without a terminal, which is the case for most Tor
13630 packages, are not impacted.) Fixes bug 24246; bugfix on every
13631 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13632 Found by OSS-Fuzz as testcase 6360145429790720.
13633 - Fix a denial of service issue where an attacker could crash a
13634 directory authority using a malformed router descriptor. Fixes bug
13635 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13637 - When checking for replays in the INTRODUCE1 cell data for a
13638 (legacy) onion service, correctly detect replays in the RSA-
13639 encrypted part of the cell. We were previously checking for
13640 replays on the entire cell, but those can be circumvented due to
13641 the malleability of Tor's legacy hybrid encryption. This fix helps
13642 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13643 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13646 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13647 - Fix a use-after-free error that could crash v2 Tor onion services
13648 when they failed to open circuits while expiring introduction
13649 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13650 also tracked as TROVE-2017-013 and CVE-2017-8823.
13652 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13653 - When running as a relay, make sure that we never build a path
13654 through ourselves, even in the case where we have somehow lost the
13655 version of our descriptor appearing in the consensus. Fixes part
13656 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13657 as TROVE-2017-012 and CVE-2017-8822.
13658 - When running as a relay, make sure that we never choose ourselves
13659 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13660 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13662 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13663 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13664 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13665 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13666 identifying and finding a workaround to this bug and to Moritz,
13667 Arthur Edelstein, and Roger for helping to track it down and
13670 o Minor features (bridge):
13671 - Bridges now include notice in their descriptors that they are
13672 bridges, and notice of their distribution status, based on their
13673 publication settings. Implements ticket 18329. For more fine-
13674 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13677 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13678 - Add an IPv6 address for the "bastet" directory authority. Closes
13681 o Minor features (geoip):
13682 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13685 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13686 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13687 relays, to prevent spurious address resolutions and descriptor
13688 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13689 bugfix on in 0.2.8.1-alpha.
13691 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13692 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13693 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13695 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13696 - When a circuit is marked for close, do not attempt to package any
13697 cells for channels on that circuit. Previously, we would detect
13698 this condition lower in the call stack, when we noticed that the
13699 circuit had no attached channel, and log an annoying message.
13700 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13702 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
13703 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13704 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13707 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13708 - Avoid a crash when transitioning from client mode to bridge mode.
13709 Previously, we would launch the worker threads whenever our
13710 "public server" mode changed, but not when our "server" mode
13711 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13714 Changes in version 0.3.0.13 - 2017-12-01
13715 Tor 0.3.0.13 backports important security and stability bugfixes from
13716 later Tor releases. All Tor users should upgrade to this release, or
13717 to another of the releases coming out today.
13719 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13720 2018. If you need a release with long-term support, please stick with
13721 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13723 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13724 - Fix a denial of service bug where an attacker could use a
13725 malformed directory object to cause a Tor instance to pause while
13726 OpenSSL would try to read a passphrase from the terminal. (Tor
13727 instances run without a terminal, which is the case for most Tor
13728 packages, are not impacted.) Fixes bug 24246; bugfix on every
13729 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13730 Found by OSS-Fuzz as testcase 6360145429790720.
13731 - Fix a denial of service issue where an attacker could crash a
13732 directory authority using a malformed router descriptor. Fixes bug
13733 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13735 - When checking for replays in the INTRODUCE1 cell data for a
13736 (legacy) onion service, correctly detect replays in the RSA-
13737 encrypted part of the cell. We were previously checking for
13738 replays on the entire cell, but those can be circumvented due to
13739 the malleability of Tor's legacy hybrid encryption. This fix helps
13740 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13741 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13744 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13745 - Fix a use-after-free error that could crash v2 Tor onion services
13746 when they failed to open circuits while expiring introduction
13747 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13748 also tracked as TROVE-2017-013 and CVE-2017-8823.
13750 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13751 - When running as a relay, make sure that we never build a path
13752 through ourselves, even in the case where we have somehow lost the
13753 version of our descriptor appearing in the consensus. Fixes part
13754 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13755 as TROVE-2017-012 and CVE-2017-8822.
13756 - When running as a relay, make sure that we never choose ourselves
13757 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13758 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13760 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13761 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13762 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13763 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13764 identifying and finding a workaround to this bug and to Moritz,
13765 Arthur Edelstein, and Roger for helping to track it down and
13768 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13769 - Enable a couple of pieces of Windows hardening: one
13770 (HeapEnableTerminationOnCorruption) that has been on-by-default
13771 since Windows 8, and unavailable before Windows 7; and one
13772 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13773 affect us, but shouldn't do any harm. Closes ticket 21953.
13775 o Minor features (bridge, backport from 0.3.1.9):
13776 - Bridges now include notice in their descriptors that they are
13777 bridges, and notice of their distribution status, based on their
13778 publication settings. Implements ticket 18329. For more fine-
13779 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13782 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13783 - Add an IPv6 address for the "bastet" directory authority. Closes
13786 o Minor features (geoip):
13787 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13790 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13791 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13792 relays, to prevent spurious address resolutions and descriptor
13793 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13794 bugfix on in 0.2.8.1-alpha.
13796 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13797 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13798 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13800 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13801 - When a circuit is marked for close, do not attempt to package any
13802 cells for channels on that circuit. Previously, we would detect
13803 this condition lower in the call stack, when we noticed that the
13804 circuit had no attached channel, and log an annoying message.
13805 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13807 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13808 - Avoid a crash when transitioning from client mode to bridge mode.
13809 Previously, we would launch the worker threads whenever our
13810 "public server" mode changed, but not when our "server" mode
13811 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13813 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13814 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13815 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13818 Changes in version 0.2.9.14 - 2017-12-01
13819 Tor 0.3.0.13 backports important security and stability bugfixes from
13820 later Tor releases. All Tor users should upgrade to this release, or
13821 to another of the releases coming out today.
13823 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13824 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13825 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13826 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13827 identifying and finding a workaround to this bug and to Moritz,
13828 Arthur Edelstein, and Roger for helping to track it down and
13831 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13832 - Fix a denial of service bug where an attacker could use a
13833 malformed directory object to cause a Tor instance to pause while
13834 OpenSSL would try to read a passphrase from the terminal. (Tor
13835 instances run without a terminal, which is the case for most Tor
13836 packages, are not impacted.) Fixes bug 24246; bugfix on every
13837 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13838 Found by OSS-Fuzz as testcase 6360145429790720.
13839 - Fix a denial of service issue where an attacker could crash a
13840 directory authority using a malformed router descriptor. Fixes bug
13841 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13843 - When checking for replays in the INTRODUCE1 cell data for a
13844 (legacy) onion service, correctly detect replays in the RSA-
13845 encrypted part of the cell. We were previously checking for
13846 replays on the entire cell, but those can be circumvented due to
13847 the malleability of Tor's legacy hybrid encryption. This fix helps
13848 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13849 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13852 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13853 - Fix a use-after-free error that could crash v2 Tor onion services
13854 when they failed to open circuits while expiring introduction
13855 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13856 also tracked as TROVE-2017-013 and CVE-2017-8823.
13858 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13859 - When running as a relay, make sure that we never build a path
13860 through ourselves, even in the case where we have somehow lost the
13861 version of our descriptor appearing in the consensus. Fixes part
13862 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13863 as TROVE-2017-012 and CVE-2017-8822.
13865 o Minor features (bridge, backport from 0.3.1.9):
13866 - Bridges now include notice in their descriptors that they are
13867 bridges, and notice of their distribution status, based on their
13868 publication settings. Implements ticket 18329. For more fine-
13869 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13872 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13873 - Add an IPv6 address for the "bastet" directory authority. Closes
13876 o Minor features (geoip):
13877 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13880 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13881 - Enable a couple of pieces of Windows hardening: one
13882 (HeapEnableTerminationOnCorruption) that has been on-by-default
13883 since Windows 8, and unavailable before Windows 7; and one
13884 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13885 affect us, but shouldn't do any harm. Closes ticket 21953.
13887 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13888 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13889 relays, to prevent spurious address resolutions and descriptor
13890 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13891 bugfix on in 0.2.8.1-alpha.
13893 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13894 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13895 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13897 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13898 - When a circuit is marked for close, do not attempt to package any
13899 cells for channels on that circuit. Previously, we would detect
13900 this condition lower in the call stack, when we noticed that the
13901 circuit had no attached channel, and log an annoying message.
13902 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13904 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13905 - Avoid a crash when transitioning from client mode to bridge mode.
13906 Previously, we would launch the worker threads whenever our
13907 "public server" mode changed, but not when our "server" mode
13908 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13910 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13911 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13912 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13915 Changes in version 0.2.8.17 - 2017-12-01
13916 Tor 0.2.8.17 backports important security and stability bugfixes from
13917 later Tor releases. All Tor users should upgrade to this release, or
13918 to another of the releases coming out today.
13920 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13921 2018. If you need a release with long-term support, please upgrade with
13922 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13924 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13925 - Fix a denial of service bug where an attacker could use a
13926 malformed directory object to cause a Tor instance to pause while
13927 OpenSSL would try to read a passphrase from the terminal. (Tor
13928 instances run without a terminal, which is the case for most Tor
13929 packages, are not impacted.) Fixes bug 24246; bugfix on every
13930 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13931 Found by OSS-Fuzz as testcase 6360145429790720.
13932 - When checking for replays in the INTRODUCE1 cell data for a
13933 (legacy) onion service, correctly detect replays in the RSA-
13934 encrypted part of the cell. We were previously checking for
13935 replays on the entire cell, but those can be circumvented due to
13936 the malleability of Tor's legacy hybrid encryption. This fix helps
13937 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13938 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13941 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13942 - Fix a use-after-free error that could crash v2 Tor onion services
13943 when they failed to open circuits while expiring introduction
13944 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13945 also tracked as TROVE-2017-013 and CVE-2017-8823.
13947 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13948 - When running as a relay, make sure that we never build a path through
13949 ourselves, even in the case where we have somehow lost the version of
13950 our descriptor appearing in the consensus. Fixes part of bug 21534;
13951 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
13954 o Minor features (bridge, backport from 0.3.1.9):
13955 - Bridges now include notice in their descriptors that they are
13956 bridges, and notice of their distribution status, based on their
13957 publication settings. Implements ticket 18329. For more fine-
13958 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13961 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13962 - Add an IPv6 address for the "bastet" directory authority. Closes
13965 o Minor features (geoip):
13966 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13969 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13970 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13971 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13974 Changes in version 0.2.5.16 - 2017-12-01
13975 Tor 0.2.5.13 backports important security and stability bugfixes from
13976 later Tor releases. All Tor users should upgrade to this release, or
13977 to another of the releases coming out today.
13979 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13980 2018. If you need a release with long-term support, please upgrade to
13981 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13983 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13984 - Fix a denial of service bug where an attacker could use a
13985 malformed directory object to cause a Tor instance to pause while
13986 OpenSSL would try to read a passphrase from the terminal. (Tor
13987 instances run without a terminal, which is the case for most Tor
13988 packages, are not impacted.) Fixes bug 24246; bugfix on every
13989 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13990 Found by OSS-Fuzz as testcase 6360145429790720.
13991 - When checking for replays in the INTRODUCE1 cell data for a
13992 (legacy) onion service, correctly detect replays in the RSA-
13993 encrypted part of the cell. We were previously checking for
13994 replays on the entire cell, but those can be circumvented due to
13995 the malleability of Tor's legacy hybrid encryption. This fix helps
13996 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13997 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
14000 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
14001 - When running as a relay, make sure that we never build a path
14002 through ourselves, even in the case where we have somehow lost the
14003 version of our descriptor appearing in the consensus. Fixes part
14004 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
14005 as TROVE-2017-012 and CVE-2017-8822.
14007 o Minor features (bridge, backport from 0.3.1.9):
14008 - Bridges now include notice in their descriptors that they are
14009 bridges, and notice of their distribution status, based on their
14010 publication settings. Implements ticket 18329. For more fine-
14011 grained control of how a bridge is distributed, upgrade to 0.3.2.x
14014 o Minor features (geoip):
14015 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
14019 Changes in version 0.3.2.5-alpha - 2017-11-22
14020 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
14021 fixes several stability and reliability bugs, including a fix for
14022 intermittent bootstrapping failures that some people have been seeing
14023 since the 0.3.0.x series.
14025 Please test this alpha out -- many of these fixes will soon be
14026 backported to stable Tor versions if no additional bugs are found
14029 o Major bugfixes (bootstrapping):
14030 - Fetch descriptors aggressively whenever we lack enough to build
14031 circuits, regardless of how many descriptors we are missing.
14032 Previously, we would delay launching the fetch when we had fewer
14033 than 15 missing descriptors, even if some of those descriptors
14034 were blocking circuits from building. Fixes bug 23985; bugfix on
14035 0.1.1.11-alpha. The effects of this bug became worse in
14036 0.3.0.3-alpha, when we began treating missing descriptors from our
14037 primary guards as a reason to delay circuits.
14038 - Don't try fetching microdescriptors from relays that have failed
14039 to deliver them in the past. Fixes bug 23817; bugfix
14042 o Minor features (directory authority):
14043 - Make the "Exit" flag assignment only depend on whether the exit
14044 policy allows connections to ports 80 and 443. Previously relays
14045 would get the Exit flag if they allowed connections to one of
14046 these ports and also port 6667. Resolves ticket 23637.
14048 o Minor features (geoip):
14049 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
14052 o Minor features (linux seccomp2 sandbox):
14053 - Update the sandbox rules so that they should now work correctly
14054 with Glibc 2.26. Closes ticket 24315.
14056 o Minor features (logging):
14057 - Downgrade a pair of log messages that could occur when an exit's
14058 resolver gave us an unusual (but not forbidden) response. Closes
14060 - Improve the message we log when re-enabling circuit build timeouts
14061 after having received a consensus. Closes ticket 20963.
14063 o Minor bugfixes (compilation):
14064 - Fix a memory leak warning in one of the libevent-related
14065 configuration tests that could occur when manually specifying
14066 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
14067 Found and patched by Alex Xu.
14068 - When detecting OpenSSL on Windows from our configure script, make
14069 sure to try linking with the ws2_32 library. Fixes bug 23783;
14070 bugfix on 0.3.2.2-alpha.
14072 o Minor bugfixes (control port, linux seccomp2 sandbox):
14073 - Avoid a crash when attempting to use the seccomp2 sandbox together
14074 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
14077 o Minor bugfixes (control port, onion services):
14078 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
14079 HS_DESC event when a service is not able to upload a descriptor.
14080 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
14082 o Minor bugfixes (directory cache):
14083 - Recover better from empty or corrupt files in the consensus cache
14084 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
14085 - When a consensus diff calculation is only partially successful,
14086 only record the successful parts as having succeeded. Partial
14087 success can happen if (for example) one compression method fails
14088 but the others succeed. Previously we misrecorded all the
14089 calculations as having succeeded, which would later cause a
14090 nonfatal assertion failure. Fixes bug 24086; bugfix
14093 o Minor bugfixes (logging):
14094 - Only log once if we notice that KIST support is gone. Fixes bug
14095 24158; bugfix on 0.3.2.1-alpha.
14096 - Suppress a log notice when relay descriptors arrive. We already
14097 have a bootstrap progress for this so no need to log notice
14098 everytime tor receives relay descriptors. Microdescriptors behave
14099 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
14101 o Minor bugfixes (network layer):
14102 - When closing a connection via close_connection_immediately(), we
14103 mark it as "not blocked on bandwidth", to prevent later calls from
14104 trying to unblock it, and give it permission to read. This fixes a
14105 backtrace warning that can happen on relays under various
14106 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
14108 o Minor bugfixes (onion services):
14109 - The introduction circuit was being timed out too quickly while
14110 waiting for the rendezvous circuit to complete. Keep the intro
14111 circuit around longer instead of timing out and reopening new ones
14112 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
14113 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
14114 so it matches dir-spec.txt. Fixes bug 24262; bugfix
14116 - Silence a warning about failed v3 onion descriptor uploads that
14117 can happen naturally under certain edge cases. Fixes part of bug
14118 23662; bugfix on 0.3.2.1-alpha.
14120 o Minor bugfixes (tests):
14121 - Fix a memory leak in one of the bridge-distribution test cases.
14122 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
14123 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
14124 to correctly handle cases where a caller gives it an RSA key of
14125 under 160 bits. (This is not actually a bug in Tor itself, but
14126 rather in our fuzzing code.) Fixes bug 24247; bugfix on
14127 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
14130 - Add notes in man page regarding OS support for the various
14131 scheduler types. Attempt to use less jargon in the scheduler
14132 section. Closes ticket 24254.
14135 Changes in version 0.3.2.4-alpha - 2017-11-08
14136 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
14137 It fixes several stability and reliability bugs, especially including
14138 a major reliability issue that has been plaguing fast exit relays in
14141 o Major bugfixes (exit relays, DNS):
14142 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
14143 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
14144 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
14145 identifying and finding a workaround to this bug and to Moritz,
14146 Arthur Edelstein, and Roger for helping to track it down and
14149 o Major bugfixes (scheduler, channel):
14150 - Stop processing scheduled channels if they closed while flushing
14151 cells. This can happen if the write on the connection fails
14152 leading to the channel being closed while in the scheduler loop.
14153 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
14155 o Minor features (logging, scheduler):
14156 - Introduce a SCHED_BUG() function to log extra information about
14157 the scheduler state if we ever catch a bug in the scheduler.
14158 Closes ticket 23753.
14160 o Minor features (removed deprecations):
14161 - The ClientDNSRejectInternalAddresses flag can once again be set in
14162 non-testing Tor networks, so long as they do not use the default
14163 directory authorities. This change also removes the deprecation of
14164 this flag from 0.2.9.2-alpha. Closes ticket 21031.
14166 o Minor features (testing):
14167 - Our fuzzing tests now test the encrypted portions of v3 onion
14168 service descriptors. Implements more of 21509.
14170 o Minor bugfixes (directory client):
14171 - On failure to download directory information, delay retry attempts
14172 by a random amount based on the "decorrelated jitter" algorithm.
14173 Our previous delay algorithm tended to produce extra-long delays
14174 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
14176 o Minor bugfixes (IPv6, v3 single onion services):
14177 - Remove buggy code for IPv6-only v3 single onion services, and
14178 reject attempts to configure them. This release supports IPv4,
14179 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
14180 stack v3 single onion services. Fixes bug 23820; bugfix
14183 o Minor bugfixes (logging, relay):
14184 - Give only a protocol warning when the ed25519 key is not
14185 consistent between the descriptor and microdescriptor of a relay.
14186 This can happen, for instance, if the relay has been flagged
14187 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
14189 o Minor bugfixes (manpage, onion service):
14190 - Document that the HiddenServiceNumIntroductionPoints option is
14191 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
14192 bugfix on 0.3.2.1-alpha.
14194 o Minor bugfixes (memory leaks):
14195 - Fix a minor memory leak at exit in the KIST scheduler. This bug
14196 should have no user-visible impact. Fixes bug 23774; bugfix
14198 - Fix a memory leak when decrypting a badly formatted v3 onion
14199 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
14200 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
14202 o Minor bugfixes (onion services):
14203 - Cache some needed onion service client information instead of
14204 constantly computing it over and over again. Fixes bug 23623;
14205 bugfix on 0.3.2.1-alpha.
14206 - Properly retry HSv3 descriptor fetches when missing required
14207 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
14209 o Minor bugfixes (path selection):
14210 - When selecting relays by bandwidth, avoid a rounding error that
14211 could sometimes cause load to be imbalanced incorrectly.
14212 Previously, we would always round upwards; now, we round towards
14213 the nearest integer. This had the biggest effect when a relay's
14214 weight adjustments should have given it weight 0, but it got
14215 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
14216 - When calculating the fraction of nodes that have descriptors, and
14217 all nodes in the network have zero bandwidths, count the number of
14218 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
14219 - Actually log the total bandwidth in compute_weighted_bandwidths().
14220 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
14222 o Minor bugfixes (relay, crash):
14223 - Avoid a crash when transitioning from client mode to bridge mode.
14224 Previously, we would launch the worker threads whenever our
14225 "public server" mode changed, but not when our "server" mode
14226 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
14228 o Minor bugfixes (testing):
14229 - Fix a spurious fuzzing-only use of an uninitialized value. Found
14230 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
14231 - Test that IPv6-only clients can use microdescriptors when running
14232 "make test-network-all". Requires chutney master 61c28b9 or later.
14233 Closes ticket 24109.
14236 Changes in version 0.3.2.3-alpha - 2017-10-27
14237 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
14238 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
14239 directory authority, Bastet.
14241 o Directory authority changes:
14242 - Add "Bastet" as a ninth directory authority to the default list.
14243 Closes ticket 23910.
14244 - The directory authority "Longclaw" has changed its IP address.
14245 Closes ticket 23592.
14247 o Minor features (bridge):
14248 - Bridge relays can now set the BridgeDistribution config option to
14249 add a "bridge-distribution-request" line to their bridge
14250 descriptor, which tells BridgeDB how they'd like their bridge
14251 address to be given out. (Note that as of Oct 2017, BridgeDB does
14252 not yet implement this feature.) As a side benefit, this feature
14253 provides a way to distinguish bridge descriptors from non-bridge
14254 descriptors. Implements tickets 18329.
14256 o Minor features (client, entry guards):
14257 - Improve log messages when missing descriptors for primary guards.
14258 Resolves ticket 23670.
14260 o Minor features (geoip):
14261 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14264 o Minor bugfixes (bridge):
14265 - Overwrite the bridge address earlier in the process of retrieving
14266 its descriptor, to make sure we reach it on the configured
14267 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
14269 o Minor bugfixes (documentation):
14270 - Document better how to read gcov, and what our gcov postprocessing
14271 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
14273 o Minor bugfixes (entry guards):
14274 - Tor now updates its guard state when it reads a consensus
14275 regardless of whether it's missing descriptors. That makes tor use
14276 its primary guards to fetch descriptors in some edge cases where
14277 it would previously have used fallback directories. Fixes bug
14278 23862; bugfix on 0.3.0.1-alpha.
14280 o Minor bugfixes (hidden service client):
14281 - When handling multiple SOCKS request for the same .onion address,
14282 only fetch the service descriptor once.
14283 - When a descriptor fetch fails with a non-recoverable error, close
14284 all pending SOCKS requests for that .onion. Fixes bug 23653;
14285 bugfix on 0.3.2.1-alpha.
14287 o Minor bugfixes (hidden service):
14288 - Always regenerate missing hidden service public key files. Prior
14289 to this, if the public key was deleted from disk, it wouldn't get
14290 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
14292 - Make sure that we have a usable ed25519 key when the intro point
14293 relay supports ed25519 link authentication. Fixes bug 24002;
14294 bugfix on 0.3.2.1-alpha.
14296 o Minor bugfixes (hidden service, v2):
14297 - When reloading configured hidden services, copy all information
14298 from the old service object. Previously, some data was omitted,
14299 causing delays in descriptor upload, and other bugs. Fixes bug
14300 23790; bugfix on 0.2.1.9-alpha.
14302 o Minor bugfixes (memory safety, defensive programming):
14303 - Clear the target address when node_get_prim_orport() returns
14304 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14306 o Minor bugfixes (relay):
14307 - Avoid a BUG warning when receiving a dubious CREATE cell while an
14308 option transition is in progress. Fixes bug 23952; bugfix
14311 o Minor bugfixes (testing):
14312 - Adjust the GitLab CI configuration to more closely match that of
14313 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
14314 - Prevent scripts/test/coverage from attempting to move gcov output
14315 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
14316 - When running unit tests as root, skip a test that would fail
14317 because it expects a permissions error. This affects some
14318 continuous integration setups. Fixes bug 23758; bugfix
14320 - Stop unconditionally mirroring the tor repository in GitLab CI.
14321 This prevented developers from enabling GitLab CI on master. Fixes
14322 bug 23755; bugfix on 0.3.2.2-alpha.
14323 - Fix the hidden service v3 descriptor decoding fuzzing to use the
14324 latest decoding API correctly. Fixes bug 21509; bugfix
14327 o Minor bugfixes (warnings):
14328 - When we get an HTTP request on a SOCKS port, tell the user about
14329 the new HTTPTunnelPort option. Previously, we would give a "Tor is
14330 not an HTTP Proxy" message, which stopped being true when
14331 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
14335 Changes in version 0.2.5.15 - 2017-10-25
14336 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
14337 series. It also adds a new directory authority, Bastet.
14339 Note: the Tor 0.2.5 series will no longer be supported after 1 May
14340 2018. If you need a release with long-term support, please upgrade to
14341 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
14343 o Directory authority changes:
14344 - Add "Bastet" as a ninth directory authority to the default list.
14345 Closes ticket 23910.
14346 - The directory authority "Longclaw" has changed its IP address.
14347 Closes ticket 23592.
14349 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14350 - Avoid an assertion failure bug affecting our implementation of
14351 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14352 handling of "0xx" differs from what we had expected. Fixes bug
14353 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14355 o Minor features (geoip):
14356 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14359 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14360 - Fix a memset() off the end of an array when packing cells. This
14361 bug should be harmless in practice, since the corrupted bytes are
14362 still in the same structure, and are always padding bytes,
14363 ignored, or immediately overwritten, depending on compiler
14364 behavior. Nevertheless, because the memset()'s purpose is to make
14365 sure that any other cell-handling bugs can't expose bytes to the
14366 network, we need to fix it. Fixes bug 22737; bugfix on
14367 0.2.4.11-alpha. Fixes CID 1401591.
14369 o Build features (backport from 0.3.1.5-alpha):
14370 - Tor's repository now includes a Travis Continuous Integration (CI)
14371 configuration file (.travis.yml). This is meant to help new
14372 developers and contributors who fork Tor to a Github repository be
14373 better able to test their changes, and understand what we expect
14374 to pass. To use this new build feature, you must fork Tor to your
14375 Github account, then go into the "Integrations" menu in the
14376 repository settings for your fork and enable Travis, then push
14377 your changes. Closes ticket 22636.
14380 Changes in version 0.2.8.16 - 2017-10-25
14381 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
14382 series, including a bugfix for a crash issue that had affected relays
14383 under memory pressure. It also adds a new directory authority, Bastet.
14385 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
14386 2018. If you need a release with long-term support, please stick with
14387 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
14389 o Directory authority changes:
14390 - Add "Bastet" as a ninth directory authority to the default list.
14391 Closes ticket 23910.
14392 - The directory authority "Longclaw" has changed its IP address.
14393 Closes ticket 23592.
14395 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14396 - Fix a timing-based assertion failure that could occur when the
14397 circuit out-of-memory handler freed a connection's output buffer.
14398 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14400 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14401 - Remove longclaw's IPv6 address, as it will soon change. Authority
14402 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14403 3/8 directory authorities with IPv6 addresses, but there are also
14404 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14406 o Minor features (geoip):
14407 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14411 Changes in version 0.2.9.13 - 2017-10-25
14412 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
14413 series, including a bugfix for a crash issue that had affected relays
14414 under memory pressure. It also adds a new directory authority, Bastet.
14416 o Directory authority changes:
14417 - Add "Bastet" as a ninth directory authority to the default list.
14418 Closes ticket 23910.
14419 - The directory authority "Longclaw" has changed its IP address.
14420 Closes ticket 23592.
14422 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14423 - Fix a timing-based assertion failure that could occur when the
14424 circuit out-of-memory handler freed a connection's output buffer.
14425 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14427 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14428 - Remove longclaw's IPv6 address, as it will soon change. Authority
14429 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14430 3/8 directory authorities with IPv6 addresses, but there are also
14431 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14433 o Minor features (geoip):
14434 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14437 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
14438 - When a directory authority rejects a descriptor or extrainfo with
14439 a given digest, mark that digest as undownloadable, so that we do
14440 not attempt to download it again over and over. We previously
14441 tried to avoid downloading such descriptors by other means, but we
14442 didn't notice if we accidentally downloaded one anyway. This
14443 behavior became problematic in 0.2.7.2-alpha, when authorities
14444 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14447 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14448 - Clear the address when node_get_prim_orport() returns early.
14449 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14451 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
14452 - When running as a Windows service, set the ID of the main thread
14453 correctly. Failure to do so made us fail to send log messages to
14454 the controller in 0.2.1.16-rc, slowed down controller event
14455 delivery in 0.2.7.3-rc and later, and crash with an assertion
14456 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14457 Patch and diagnosis from "Vort".
14460 Changes in version 0.3.0.12 - 2017-10-25
14461 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
14462 series, including a bugfix for a crash issue that had affected relays
14463 under memory pressure. It also adds a new directory authority, Bastet.
14465 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
14466 2018. If you need a release with long-term support, please stick with
14467 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
14469 o Directory authority changes:
14470 - Add "Bastet" as a ninth directory authority to the default list.
14471 Closes ticket 23910.
14472 - The directory authority "Longclaw" has changed its IP address.
14473 Closes ticket 23592.
14475 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14476 - Fix a timing-based assertion failure that could occur when the
14477 circuit out-of-memory handler freed a connection's output buffer.
14478 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14480 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14481 - Remove longclaw's IPv6 address, as it will soon change. Authority
14482 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14483 3/8 directory authorities with IPv6 addresses, but there are also
14484 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14486 o Minor features (geoip):
14487 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14490 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
14491 - When a directory authority rejects a descriptor or extrainfo with
14492 a given digest, mark that digest as undownloadable, so that we do
14493 not attempt to download it again over and over. We previously
14494 tried to avoid downloading such descriptors by other means, but we
14495 didn't notice if we accidentally downloaded one anyway. This
14496 behavior became problematic in 0.2.7.2-alpha, when authorities
14497 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14500 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14501 - Avoid a possible double close of a circuit by the intro point on
14502 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14503 bugfix on 0.3.0.1-alpha.
14505 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14506 - Clear the address when node_get_prim_orport() returns early.
14507 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14509 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
14510 - When running as a Windows service, set the ID of the main thread
14511 correctly. Failure to do so made us fail to send log messages to
14512 the controller in 0.2.1.16-rc, slowed down controller event
14513 delivery in 0.2.7.3-rc and later, and crash with an assertion
14514 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14515 Patch and diagnosis from "Vort".
14518 Changes in version 0.3.1.8 - 2017-10-25
14519 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
14520 It includes several bugfixes, including a bugfix for a crash issue
14521 that had affected relays under memory pressure. It also adds
14522 a new directory authority, Bastet.
14524 o Directory authority changes:
14525 - Add "Bastet" as a ninth directory authority to the default list.
14526 Closes ticket 23910.
14527 - The directory authority "Longclaw" has changed its IP address.
14528 Closes ticket 23592.
14530 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14531 - Fix a timing-based assertion failure that could occur when the
14532 circuit out-of-memory handler freed a connection's output buffer.
14533 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14535 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14536 - Remove longclaw's IPv6 address, as it will soon change. Authority
14537 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14538 3/8 directory authorities with IPv6 addresses, but there are also
14539 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14541 o Minor features (geoip):
14542 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14545 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
14546 - Fix a compilation warning when building with zstd support on
14547 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14548 and fixed by Andreas Stieger.
14550 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
14551 - Handle a pathological case when decompressing Zstandard data when
14552 the output buffer size is zero. Fixes bug 23551; bugfix
14555 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
14556 - Remove the length limit on HTTP status lines that authorities can
14557 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
14559 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14560 - Avoid a possible double close of a circuit by the intro point on
14561 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14562 bugfix on 0.3.0.1-alpha.
14564 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14565 - Clear the address when node_get_prim_orport() returns early.
14566 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14568 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
14569 - Fix additional channelpadding unit test failures by using mocked
14570 time instead of actual time for all tests. Fixes bug 23608; bugfix
14574 Changes in version 0.3.2.2-alpha - 2017-09-29
14575 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
14576 release fixes several minor bugs in the new scheduler and next-
14577 generation onion services; both features were newly added in the 0.3.2
14578 series. Other fixes in this alpha include several fixes for non-fatal
14579 tracebacks which would appear in logs.
14581 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
14582 alpha does not contain any substantial new features. Minor features
14583 include better testing and logging.
14585 The following comprises the complete list of changes included
14588 o Major bugfixes (relay, crash, assertion failure):
14589 - Fix a timing-based assertion failure that could occur when the
14590 circuit out-of-memory handler freed a connection's output buffer.
14591 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14593 o Major bugfixes (scheduler):
14594 - If a channel is put into the scheduler's pending list, then it
14595 starts closing, and then if the scheduler runs before it finishes
14596 closing, the scheduler will get stuck trying to flush its cells
14597 while the lower layers refuse to cooperate. Fix that race
14598 condition by giving the scheduler an escape method. Fixes bug
14599 23676; bugfix on 0.3.2.1-alpha.
14601 o Minor features (build, compilation):
14602 - The "check-changes" feature is now part of the "make check" tests;
14603 we'll use it to try to prevent misformed changes files from
14604 accumulating. Closes ticket 23564.
14605 - Tor builds should now fail if there are any mismatches between the
14606 C type representing a configuration variable and the C type the
14607 data-driven parser uses to store a value there. Previously, we
14608 needed to check these by hand, which sometimes led to mistakes.
14609 Closes ticket 23643.
14611 o Minor features (directory authorities):
14612 - Remove longclaw's IPv6 address, as it will soon change. Authority
14613 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14614 3/8 directory authorities with IPv6 addresses, but there are also
14615 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14617 o Minor features (hidden service, circuit, logging):
14618 - Improve logging of many callsite in the circuit subsystem to print
14619 the circuit identifier(s).
14620 - Log when we cleanup an intro point from a service so we know when
14621 and for what reason it happened. Closes ticket 23604.
14623 o Minor features (logging):
14624 - Log more circuit information whenever we are about to try to
14625 package a relay cell on a circuit with a nonexistent n_chan.
14626 Attempt to diagnose ticket 8185.
14627 - Improve info-level log identification of particular circuits, to
14628 help with debugging. Closes ticket 23645.
14630 o Minor features (relay):
14631 - When choosing which circuits can be expired as unused, consider
14632 circuits from clients even if those clients used regular CREATE
14633 cells to make them; and do not consider circuits from relays even
14634 if they were made with CREATE_FAST. Part of ticket 22805.
14636 o Minor features (robustness):
14637 - Change several fatal assertions when flushing buffers into non-
14638 fatal assertions, to prevent any recurrence of 23690.
14640 o Minor features (spec conformance, bridge, diagnostic):
14641 - When handling the USERADDR command on an ExtOrPort, warn when the
14642 transports provides a USERADDR with no port. In a future version,
14643 USERADDR commands of this format may be rejected. Detects problems
14644 related to ticket 23080.
14646 o Minor features (testing):
14647 - Add a unit test to make sure that our own generated platform
14648 string will be accepted by directory authorities. Closes
14651 o Minor bugfixes (bootstrapping):
14652 - When warning about state file clock skew, report the correct
14653 direction for the detected skew. Fixes bug 23606; bugfix
14655 - Avoid an assertion failure when logging a state file clock skew
14656 very early in bootstrapping. Fixes bug 23607; bugfix
14659 o Minor bugfixes (build, compilation):
14660 - Fix a compilation warning when building with zstd support on
14661 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14662 and fixed by Andreas Stieger.
14663 - When searching for OpenSSL, don't accept any OpenSSL library that
14664 lacks TLSv1_1_method(): Tor doesn't build with those versions.
14665 Additionally, look in /usr/local/opt/openssl, if it's present.
14666 These changes together repair the default build on OSX systems
14667 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
14669 o Minor bugfixes (compression):
14670 - Handle a pathological case when decompressing Zstandard data when
14671 the output buffer size is zero. Fixes bug 23551; bugfix
14674 o Minor bugfixes (documentation):
14675 - Fix manpage to not refer to the obsolete (and misspelled)
14676 UseEntryGuardsAsDirectoryGuards parameter in the description of
14677 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
14679 o Minor bugfixes (hidden service v3):
14680 - Don't log an assertion failure when we can't find the right
14681 information to extend to an introduction point. In rare cases,
14682 this could happen, causing a warning, even though tor would
14683 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
14684 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
14685 much bigger so the rendezvous point can't distinguish which hidden
14686 service protocol is being used. Fixes bug 23420; bugfix
14689 o Minor bugfixes (hidden service, relay):
14690 - Avoid a possible double close of a circuit by the intro point on
14691 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14692 bugfix on 0.3.0.1-alpha.
14694 o Minor bugfixes (logging, relay shutdown, annoyance):
14695 - When a circuit is marked for close, do not attempt to package any
14696 cells for channels on that circuit. Previously, we would detect
14697 this condition lower in the call stack, when we noticed that the
14698 circuit had no attached channel, and log an annoying message.
14699 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
14701 o Minor bugfixes (scheduler):
14702 - When switching schedulers due to a consensus change, we didn't
14703 give the new scheduler a chance to react to the consensus. Fix
14704 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
14705 - Make the KISTSchedRunInterval option a non negative value. With
14706 this, the way to disable KIST through the consensus is to set it
14707 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
14708 - Only notice log the selected scheduler when we switch scheduler
14709 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
14710 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
14711 by a different tv_usec data type. Fixes bug 23575; bugfix
14713 - Make a hard exit if tor is unable to pick a scheduler which can
14714 happen if the user specifies a scheduler type that is not
14715 supported and not other types in Schedulers. Fixes bug 23581;
14716 bugfix on 0.3.2.1-alpha.
14717 - Properly initialize the scheduler last run time counter so it is
14718 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
14720 o Minor bugfixes (testing):
14721 - Capture and detect several "Result does not fit" warnings in unit
14722 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
14724 - Fix additional channelpadding unit test failures by using mocked
14725 time instead of actual time for all tests. Fixes bug 23608; bugfix
14727 - The removal of some old scheduler options caused some tests to
14728 fail on BSD systems. Assume current behavior is correct and make
14729 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
14731 o Code simplification and refactoring:
14732 - Remove various ways of testing circuits and connections for
14733 "clientness"; instead, favor channel_is_client(). Part of
14736 o Deprecated features:
14737 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
14738 now deprecated; they do not apply to relays, and they have had no
14739 effect on clients since 0.2.8.x. Closes ticket 19704.
14742 - HiddenServiceVersion man page entry wasn't mentioning the now
14743 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
14744 - Clarify that the Address option is entirely about setting an
14745 advertised IPv4 address. Closes ticket 18891.
14746 - Clarify the manpage's use of the term "address" to clarify what
14747 kind of address is intended. Closes ticket 21405.
14748 - Document that onion service subdomains are allowed, and ignored.
14749 Closes ticket 18736.
14752 Changes in version 0.3.2.1-alpha - 2017-09-18
14753 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
14754 includes support for our next-generation ("v3") onion service
14755 protocol, and adds a new circuit scheduler for more responsive
14756 forwarding decisions from relays. There are also numerous other small
14757 features and bugfixes here.
14759 Below are the changes since Tor 0.3.1.7.
14761 o Major feature (scheduler, channel):
14762 - Tor now uses new schedulers to decide which circuits should
14763 deliver cells first, in order to improve congestion at relays. The
14764 first type is called "KIST" ("Kernel Informed Socket Transport"),
14765 and is only available on Linux-like systems: it uses feedback from
14766 the kernel to prevent the kernel's TCP buffers from growing too
14767 full. The second new scheduler type is called "KISTLite": it
14768 behaves the same as KIST, but runs on systems without kernel
14769 support for inspecting TCP implementation details. The old
14770 scheduler is still available, under the name "Vanilla". To change
14771 the default scheduler preference order, use the new "Schedulers"
14772 option. (The default preference order is "KIST,KISTLite,Vanilla".)
14774 Matt Traudt implemented KIST, based on research by Rob Jansen,
14775 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
14776 more information, see the design paper at
14777 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
14778 followup implementation paper at https://arxiv.org/abs/1709.01044.
14779 Closes ticket 12541.
14781 o Major features (next-generation onion services):
14782 - Tor now supports the next-generation onion services protocol for
14783 clients and services! As part of this release, the core of
14784 proposal 224 has been implemented and is available for
14785 experimentation and testing by our users. This newer version of
14786 onion services ("v3") features many improvements over the legacy
14789 a) Better crypto (replaced SHA1/DH/RSA1024
14790 with SHA3/ed25519/curve25519)
14792 b) Improved directory protocol, leaking much less information to
14795 c) Improved directory protocol, with smaller surface for
14798 d) Better onion address security against impersonation.
14800 e) More extensible introduction/rendezvous protocol.
14802 f) A cleaner and more modular codebase.
14804 You can identify a next-generation onion address by its length:
14805 they are 56 characters long, as in
14806 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
14808 In the future, we will release more options and features for v3
14809 onion services, but we first need a testing period, so that the
14810 current codebase matures and becomes more robust. Planned features
14811 include: offline keys, advanced client authorization, improved
14812 guard algorithms, and statistics. For full details, see
14815 Legacy ("v2") onion services will still work for the foreseeable
14816 future, and will remain the default until this new codebase gets
14817 tested and hardened. Service operators who want to experiment with
14818 the new system can use the 'HiddenServiceVersion 3' torrc
14819 directive along with the regular onion service configuration
14820 options. We will publish a blog post about this new feature
14823 o Major bugfixes (usability, control port):
14824 - Report trusted clock skew indications as bootstrap errors, so
14825 controllers can more easily alert users when their clocks are
14826 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
14828 o Minor features (bug detection):
14829 - Log a warning message with a stack trace for any attempt to call
14830 get_options() during option validation. This pattern has caused
14831 subtle bugs in the past. Closes ticket 22281.
14833 o Minor features (client):
14834 - You can now use Tor as a tunneled HTTP proxy: use the new
14835 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
14836 requests. Closes ticket 22407.
14837 - Add an extra check to make sure that we always use the newer guard
14838 selection code for picking our guards. Closes ticket 22779.
14839 - When downloading (micro)descriptors, don't split the list into
14840 multiple requests unless we want at least 32 descriptors.
14841 Previously, we split at 4, not 32, which led to significant
14842 overhead in HTTP request size and degradation in compression
14843 performance. Closes ticket 23220.
14845 o Minor features (command line):
14846 - Add a new commandline option, --key-expiration, which prints when
14847 the current signing key is going to expire. Implements ticket
14848 17639; patch by Isis Lovecruft.
14850 o Minor features (control port):
14851 - If an application tries to use the control port as an HTTP proxy,
14852 respond with a meaningful "This is the Tor control port" message,
14853 and log the event. Closes ticket 1667. Patch from Ravi
14855 - Provide better error message for GETINFO desc/(id|name) when not
14856 fetching router descriptors. Closes ticket 5847. Patch by
14858 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
14859 whether Tor will try to download router descriptors and
14860 microdescriptors respectively. Closes ticket 22684.
14861 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
14862 so controllers can tell whether the geoip databases are loaded.
14863 Closes ticket 23237.
14864 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
14865 events. Closes ticket 19254. Patch by "DonnchaC".
14867 o Minor features (development support):
14868 - Developers can now generate a call-graph for Tor using the
14869 "calltool" python program, which post-processes object dumps. It
14870 should work okay on many Linux and OSX platforms, and might work
14871 elsewhere too. To run it, install calltool from
14872 https://gitweb.torproject.org/user/nickm/calltool.git and run
14873 "make callgraph". Closes ticket 19307.
14875 o Minor features (ed25519):
14876 - Add validation function to checks for torsion components in
14877 ed25519 public keys, used by prop224 client-side code. Closes
14878 ticket 22006. Math help by Ian Goldberg.
14880 o Minor features (exit relay, DNS):
14881 - Improve the clarity and safety of the log message from evdns when
14882 receiving an apparently spoofed DNS reply. Closes ticket 3056.
14884 o Minor features (integration, hardening):
14885 - Add a new NoExec option to prevent Tor from running other
14886 programs. When this option is set to 1, Tor will never try to run
14887 another program, regardless of the settings of
14888 PortForwardingHelper, ClientTransportPlugin, or
14889 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
14890 without restarting Tor. Closes ticket 22976.
14892 o Minor features (logging):
14893 - Improve the warning message for specifying a relay by nickname.
14894 The previous message implied that nickname registration was still
14895 part of the Tor network design, which it isn't. Closes
14897 - If the sandbox filter fails to load, suggest to the user that
14898 their kernel might not support seccomp2. Closes ticket 23090.
14900 o Minor features (portability):
14901 - Check at configure time whether uint8_t is the same type as
14902 unsigned char. Lots of existing code already makes this
14903 assumption, and there could be strict aliasing issues if the
14904 assumption is violated. Closes ticket 22410.
14906 o Minor features (relay, configuration):
14907 - Reject attempts to use relative file paths when RunAsDaemon is
14908 set. Previously, Tor would accept these, but the directory-
14909 changing step of RunAsDaemon would give strange and/or confusing
14910 results. Closes ticket 22731.
14912 o Minor features (startup, safety):
14913 - When configured to write a PID file, Tor now exits if it is unable
14914 to do so. Previously, it would warn and continue. Closes
14917 o Minor features (static analysis):
14918 - The BUG() macro has been changed slightly so that Coverity no
14919 longer complains about dead code if the bug is impossible. Closes
14922 o Minor features (testing):
14923 - The default chutney network tests now include tests for the v3
14924 hidden service design. Make sure you have the latest version of
14925 chutney if you want to run these. Closes ticket 22437.
14926 - Add a unit test to verify that we can parse a hardcoded v2 hidden
14927 service descriptor. Closes ticket 15554.
14929 o Minor bugfixes (certificate handling):
14930 - Fix a time handling bug in Tor certificates set to expire after
14931 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
14932 Coverity as CID 1415728.
14934 o Minor bugfixes (client, usability):
14935 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
14936 SOCKS4a requests that contain IP address strings, even when
14937 SafeSocks in enabled, as this prevents user from connecting to
14938 known IP addresses without relying on DNS for resolving. SafeSocks
14939 still rejects SOCKS connections that connect to IP addresses when
14940 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
14941 bugfix on Tor 0.2.6.2-alpha.
14943 o Minor bugfixes (code correctness):
14944 - Call htons() in extend_cell_format() for encoding a 16-bit value.
14945 Previously we used ntohs(), which happens to behave the same on
14946 all the platforms we support, but which isn't really correct.
14947 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
14948 - For defense-in-depth, make the controller's write_escaped_data()
14949 function robust to extremely long inputs. Fixes bug 19281; bugfix
14950 on 0.1.1.1-alpha. Reported by Guido Vranken.
14952 o Minor bugfixes (compilation):
14953 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
14954 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
14956 o Minor bugfixes (consensus expiry):
14957 - Check for adequate directory information correctly. Previously, Tor
14958 would reconsider whether it had sufficient directory information
14959 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
14961 o Minor bugfixes (directory protocol):
14962 - Directory servers now include a "Date:" http header for response
14963 codes other than 200. Clients starting with a skewed clock and a
14964 recent consensus were getting "304 Not modified" responses from
14965 directory authorities, so without the Date header, the client
14966 would never hear about a wrong clock. Fixes bug 23499; bugfix
14968 - Make clients wait for 6 seconds before trying to download a
14969 consensus from an authority. Fixes bug 17750; bugfix
14972 o Minor bugfixes (DoS-resistance):
14973 - If future code asks if there are any running bridges, without
14974 checking if bridges are enabled, log a BUG warning rather than
14975 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
14977 o Minor bugfixes (format strictness):
14978 - Restrict several data formats to decimal. Previously, the
14979 BuildTimeHistogram entries in the state file, the "bw=" entries in
14980 the bandwidth authority file, and the process IDs passed to the
14981 __OwningControllerProcess option could all be specified in hex or
14982 octal as well as in decimal. This was not an intentional feature.
14983 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
14986 o Minor bugfixes (heartbeat):
14987 - If we fail to write a heartbeat message, schedule a retry for the
14988 minimum heartbeat interval number of seconds in the future. Fixes
14989 bug 19476; bugfix on 0.2.3.1-alpha.
14991 o Minor bugfixes (linux seccomp2 sandbox, logging):
14992 - Fix some messages on unexpected errors from the seccomp2 library.
14993 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
14995 o Minor bugfixes (logging):
14996 - Remove duplicate log messages regarding opening non-local
14997 SocksPorts upon parsing config and opening listeners at startup.
14998 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
14999 - Use a more comprehensible log message when telling the user
15000 they've excluded every running exit node. Fixes bug 7890; bugfix
15002 - When logging the number of descriptors we intend to download per
15003 directory request, do not log a number higher than then the number
15004 of descriptors we're fetching in total. Fixes bug 19648; bugfix
15006 - When warning about a directory owned by the wrong user, log the
15007 actual name of the user owning the directory. Previously, we'd log
15008 the name of the process owner twice. Fixes bug 23487; bugfix
15010 - The tor specification says hop counts are 1-based, so fix two log
15011 messages that mistakenly logged 0-based hop counts. Fixes bug
15012 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
15013 Credit to Xiaofan Li for reporting this issue.
15015 o Minor bugfixes (portability):
15016 - Stop using the PATH_MAX variable, which is not defined on GNU
15017 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
15019 o Minor bugfixes (relay):
15020 - When uploading our descriptor for the first time after startup,
15021 report the reason for uploading as "Tor just started" rather than
15022 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
15023 - Avoid unnecessary calls to directory_fetches_from_authorities() on
15024 relays, to prevent spurious address resolutions and descriptor
15025 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
15026 bugfix on in 0.2.8.1-alpha.
15028 o Minor bugfixes (tests):
15029 - Fix a broken unit test for the OutboundAddress option: the parsing
15030 function was never returning an error on failure. Fixes bug 23366;
15031 bugfix on 0.3.0.3-alpha.
15032 - Fix a signed-integer overflow in the unit tests for
15033 dir/download_status_random_backoff, which was untriggered until we
15034 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
15036 o Minor bugfixes (usability, control port):
15037 - Stop making an unnecessary routerlist check in NETINFO clock skew
15038 detection; this was preventing clients from reporting NETINFO clock
15039 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
15041 o Code simplification and refactoring:
15042 - Extract the code for handling newly-open channels into a separate
15043 function from the general code to handle channel state
15044 transitions. This change simplifies our callgraph, reducing the
15045 size of the largest strongly connected component by roughly a
15046 factor of two. Closes ticket 22608.
15047 - Remove dead code for largely unused statistics on the number of
15048 times we've attempted various public key operations. Fixes bug
15049 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
15050 - Remove several now-obsolete functions for asking about old
15051 variants directory authority status. Closes ticket 22311; patch
15053 - Remove some of the code that once supported "Named" and "Unnamed"
15054 routers. Authorities no longer vote for these flags. Closes
15056 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
15057 and old hidden services, to indicate that they aren't suitable for
15058 new protocols or formats. Closes ticket 23026.
15059 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
15060 22521. Patch from Neel Chauhan.
15061 - Split the enormous circuit_send_next_onion_skin() function into
15062 multiple subfunctions. Closes ticket 22804.
15063 - Split the portions of the buffer.c module that handle particular
15064 protocols into separate modules. Part of ticket 23149.
15065 - Use our test macros more consistently, to produce more useful
15066 error messages when our unit tests fail. Add coccinelle patches to
15067 allow us to re-check for test macro uses. Closes ticket 22497.
15069 o Deprecated features:
15070 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
15071 only applies to direct unencrypted HTTP connections to your
15072 directory server, which your Tor probably isn't using. Closes
15076 - Clarify in the manual that "Sandbox 1" is only supported on Linux
15077 kernels. Closes ticket 22677.
15078 - Document all values of PublishServerDescriptor in the manpage.
15079 Closes ticket 15645.
15080 - Improve the documentation for the directory port part of the
15081 DirAuthority line. Closes ticket 20152.
15082 - Restore documentation for the authorities' "approved-routers"
15083 file. Closes ticket 21148.
15085 o Removed features:
15086 - The AllowDotExit option has been removed as unsafe. It has been
15087 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
15088 - The ClientDNSRejectInternalAddresses flag can no longer be set on
15089 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
15090 Closes ticket 21031.
15091 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
15092 nobody was using it any longer. Closes ticket 22377.
15095 Changes in version 0.2.8.15 - 2017-09-18
15096 Tor 0.2.8.15 backports a collection of bugfixes from later
15099 Most significantly, it includes a fix for TROVE-2017-008, a
15100 security bug that affects hidden services running with the
15101 SafeLogging option disabled. For more information, see
15102 https://trac.torproject.org/projects/tor/ticket/23490
15104 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
15105 2018. We suggest that you upgrade to the latest stable release if
15106 possible. If you can't, we recommend that you upgrade at least to
15107 0.2.9, which will be supported until 2020.
15109 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
15110 - Avoid an assertion failure bug affecting our implementation of
15111 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15112 handling of "0xx" differs from what we had expected. Fixes bug
15113 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15116 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
15119 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
15120 - Backport a fix for an "unused variable" warning that appeared
15121 in some versions of mingw. Fixes bug 22838; bugfix on
15124 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
15125 - Fix a memset() off the end of an array when packing cells. This
15126 bug should be harmless in practice, since the corrupted bytes are
15127 still in the same structure, and are always padding bytes,
15128 ignored, or immediately overwritten, depending on compiler
15129 behavior. Nevertheless, because the memset()'s purpose is to make
15130 sure that any other cell-handling bugs can't expose bytes to the
15131 network, we need to fix it. Fixes bug 22737; bugfix on
15132 0.2.4.11-alpha. Fixes CID 1401591.
15134 o Build features (backport from 0.3.1.5-alpha):
15135 - Tor's repository now includes a Travis Continuous Integration (CI)
15136 configuration file (.travis.yml). This is meant to help new
15137 developers and contributors who fork Tor to a Github repository be
15138 better able to test their changes, and understand what we expect
15139 to pass. To use this new build feature, you must fork Tor to your
15140 Github account, then go into the "Integrations" menu in the
15141 repository settings for your fork and enable Travis, then push
15142 your changes. Closes ticket 22636.
15145 Changes in version 0.2.9.12 - 2017-09-18
15146 Tor 0.2.9.12 backports a collection of bugfixes from later
15149 Most significantly, it includes a fix for TROVE-2017-008, a
15150 security bug that affects hidden services running with the
15151 SafeLogging option disabled. For more information, see
15152 https://trac.torproject.org/projects/tor/ticket/23490
15154 o Major features (security, backport from 0.3.0.2-alpha):
15155 - Change the algorithm used to decide DNS TTLs on client and server
15156 side, to better resist DNS-based correlation attacks like the
15157 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
15158 Feamster. Now relays only return one of two possible DNS TTL
15159 values, and clients are willing to believe DNS TTL values up to 3
15160 hours long. Closes ticket 19769.
15162 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
15163 - Fix a rare crash when sending a begin cell on a circuit whose
15164 linked directory connection had already been closed. Fixes bug
15165 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
15167 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
15168 - Fix a bug that prevented exit nodes from caching DNS records for
15169 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
15171 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
15172 - Fix a typo that had prevented TPROXY-based transparent proxying
15173 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15174 Patch from "d4fq0fQAgoJ".
15176 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
15177 - Avoid an assertion failure bug affecting our implementation of
15178 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15179 handling of "0xx" differs from what we had expected. Fixes bug
15180 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15182 o Minor features (code style, backport from 0.3.1.3-alpha):
15183 - Add "Falls through" comments to our codebase, in order to silence
15184 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15185 Stieger. Closes ticket 22446.
15187 o Minor features (geoip):
15188 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
15191 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
15192 - Roll over monthly accounting at the configured hour and minute,
15193 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15194 Found by Andrey Karpov with PVS-Studio.
15196 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
15197 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
15198 bugfix on 0.2.8.1-alpha.
15199 - Fix warnings when building with libscrypt and openssl scrypt support
15200 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15201 - When building with certain versions the mingw C header files, avoid
15202 float-conversion warnings when calling the C functions isfinite(),
15203 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
15205 o Minor bugfixes (compilation, backport from 0.3.1.7):
15206 - Avoid compiler warnings in the unit tests for running tor_sscanf()
15207 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
15209 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
15210 - Backport a fix for an "unused variable" warning that appeared
15211 in some versions of mingw. Fixes bug 22838; bugfix on
15214 o Minor bugfixes (controller, backport from 0.3.1.7):
15215 - Do not crash when receiving a HSPOST command with an empty body.
15216 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
15217 - Do not crash when receiving a POSTDESCRIPTOR command with an
15218 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
15220 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
15221 - Avoid Coverity build warnings related to our BUG() macro. By
15222 default, Coverity treats BUG() as the Linux kernel does: an
15223 instant abort(). We need to override that so our BUG() macro
15224 doesn't prevent Coverity from analyzing functions that use it.
15225 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15227 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
15228 - Fix a memset() off the end of an array when packing cells. This
15229 bug should be harmless in practice, since the corrupted bytes are
15230 still in the same structure, and are always padding bytes,
15231 ignored, or immediately overwritten, depending on compiler
15232 behavior. Nevertheless, because the memset()'s purpose is to make
15233 sure that any other cell-handling bugs can't expose bytes to the
15234 network, we need to fix it. Fixes bug 22737; bugfix on
15235 0.2.4.11-alpha. Fixes CID 1401591.
15237 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
15238 - When setting the maximum number of connections allowed by the OS,
15239 always allow some extra file descriptors for other files. Fixes
15240 bug 22797; bugfix on 0.2.0.10-alpha.
15242 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
15243 - Avoid a sandbox failure when trying to re-bind to a socket and
15244 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15246 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15247 - Permit the fchmod system call, to avoid crashing on startup when
15248 starting with the seccomp2 sandbox and an unexpected set of
15249 permissions on the data directory or its contents. Fixes bug
15250 22516; bugfix on 0.2.5.4-alpha.
15252 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
15253 - Avoid a double-marked-circuit warning that could happen when we
15254 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
15257 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15258 - Reject version numbers with non-numeric prefixes (such as +, -, or
15259 whitespace). Disallowing whitespace prevents differential version
15260 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15261 and part of 21508; bugfix on 0.0.8pre1.
15263 o Build features (backport from 0.3.1.5-alpha):
15264 - Tor's repository now includes a Travis Continuous Integration (CI)
15265 configuration file (.travis.yml). This is meant to help new
15266 developers and contributors who fork Tor to a Github repository be
15267 better able to test their changes, and understand what we expect
15268 to pass. To use this new build feature, you must fork Tor to your
15269 Github account, then go into the "Integrations" menu in the
15270 repository settings for your fork and enable Travis, then push
15271 your changes. Closes ticket 22636.
15274 Changes in version 0.3.0.11 - 2017-09-18
15275 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
15278 Most significantly, it includes a fix for TROVE-2017-008, a
15279 security bug that affects hidden services running with the
15280 SafeLogging option disabled. For more information, see
15281 https://trac.torproject.org/projects/tor/ticket/23490
15283 o Minor features (code style, backport from 0.3.1.7):
15284 - Add "Falls through" comments to our codebase, in order to silence
15285 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15286 Stieger. Closes ticket 22446.
15289 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
15292 o Minor bugfixes (compilation, backport from 0.3.1.7):
15293 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
15294 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
15296 o Minor bugfixes (controller, backport from 0.3.1.7):
15297 - Do not crash when receiving a HSPOST command with an empty body.
15298 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
15299 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
15300 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
15302 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
15303 - When setting the maximum number of connections allowed by the OS,
15304 always allow some extra file descriptors for other files. Fixes
15305 bug 22797; bugfix on 0.2.0.10-alpha.
15307 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
15308 - Remove a forgotten debugging message when an introduction point
15309 successfully establishes a hidden service prop224 circuit with
15311 - Change three other log_warn() for an introduction point to
15312 protocol warnings, because they can be failure from the network
15313 and are not relevant to the operator. Fixes bug 23078; bugfix on
15314 0.3.0.1-alpha and 0.3.0.2-alpha.
15317 Changes in version 0.3.1.7 - 2017-09-18
15318 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
15320 With the 0.3.1 series, Tor now serves and downloads directory
15321 information in more compact formats, to save on bandwidth overhead. It
15322 also contains a new padding system to resist netflow-based traffic
15323 analysis, and experimental support for building parts of Tor in Rust
15324 (though no parts of Tor are in Rust yet). There are also numerous
15325 small features, bugfixes on earlier release series, and groundwork for
15326 the hidden services revamp of 0.3.2.
15328 This release also includes a fix for TROVE-2017-008, a security bug
15329 that affects hidden services running with the SafeLogging option
15330 disabled. For more information, see
15331 https://trac.torproject.org/projects/tor/ticket/23490
15333 Per our stable release policy, we plan to support each stable release
15334 series for at least the next nine months, or for three months after
15335 the first stable release of the next series: whichever is longer. If
15336 you need a release with long-term support, we recommend that you stay
15337 with the 0.2.9 series.
15339 Below is a list of the changes since 0.3.1.6-rc. For a list of all
15340 changes since 0.3.0, see the ReleaseNotes file.
15342 o Major bugfixes (security, hidden services, loggging):
15343 - Fix a bug where we could log uninitialized stack when a certain
15344 hidden service error occurred while SafeLogging was disabled.
15345 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
15346 TROVE-2017-008 and CVE-2017-0380.
15348 o Minor features (defensive programming):
15349 - Create a pair of consensus parameters, nf_pad_tor2web and
15350 nf_pad_single_onion, to disable netflow padding in the consensus
15351 for non-anonymous connections in case the overhead is high. Closes
15354 o Minor features (diagnostic):
15355 - Add a stack trace to the bug warnings that can be logged when
15356 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
15357 attempt for bug 23105.
15359 o Minor features (geoip):
15360 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
15363 o Minor bugfixes (compilation):
15364 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
15365 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
15367 o Minor bugfixes (controller):
15368 - Do not crash when receiving a HSPOST command with an empty body.
15369 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
15370 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
15371 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
15373 o Minor bugfixes (relay):
15374 - Inform the geoip and rephist modules about all requests, even on
15375 relays that are only fetching microdescriptors. Fixes a bug
15376 related to 21585; bugfix on 0.3.0.1-alpha.
15378 o Minor bugfixes (unit tests):
15379 - Fix a channelpadding unit test failure on slow systems by using
15380 mocked time instead of actual time. Fixes bug 23077; bugfix
15384 Changes in version 0.3.1.6-rc - 2017-09-05
15385 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
15386 release series, including a bug that produced weird behavior on
15387 Windows directory caches.
15389 This is the first release candidate in the Tor 0.3.1 series. If we
15390 find no new bugs or regressions here, the first stable 0.3.1 release
15391 will be nearly identical to it.
15393 o Major bugfixes (windows, directory cache):
15394 - On Windows, do not try to delete cached consensus documents and
15395 diffs before they are unmapped from memory--Windows won't allow
15396 that. Instead, allow the consensus cache directory to grow larger,
15397 to hold files that might need to stay around longer. Fixes bug
15398 22752; bugfix on 0.3.1.1-alpha.
15400 o Minor features (directory authority):
15401 - Improve the message that authorities report to relays that present
15402 RSA/Ed25519 keypairs that conflict with previously pinned keys.
15403 Closes ticket 22348.
15405 o Minor features (geoip):
15406 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
15409 o Minor features (testing):
15410 - Add more tests for compression backend initialization. Closes
15413 o Minor bugfixes (directory cache):
15414 - Fix a memory leak when recovering space in the consensus cache.
15415 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
15417 o Minor bugfixes (hidden service):
15418 - Increase the number of circuits that a service is allowed to
15419 open over a specific period of time. The value was lower than it
15420 should be (8 vs 12) in the normal case of 3 introduction points.
15421 Fixes bug 22159; bugfix on 0.3.0.5-rc.
15422 - Fix a BUG warning during HSv3 descriptor decoding that could be
15423 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
15424 on 0.3.0.1-alpha. Bug found by "haxxpop".
15425 - Rate-limit the log messages if we exceed the maximum number of
15426 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
15428 o Minor bugfixes (logging, relay):
15429 - Remove a forgotten debugging message when an introduction point
15430 successfully establishes a hidden service prop224 circuit with
15432 - Change three other log_warn() for an introduction point to
15433 protocol warnings, because they can be failure from the network
15434 and are not relevant to the operator. Fixes bug 23078; bugfix on
15435 0.3.0.1-alpha and 0.3.0.2-alpha.
15437 o Minor bugfixes (relay):
15438 - When a relay is not running as a directory cache, it will no
15439 longer generate compressed consensuses and consensus diff
15440 information. Previously, this was a waste of disk and CPU. Fixes
15441 bug 23275; bugfix on 0.3.1.1-alpha.
15443 o Minor bugfixes (robustness, error handling):
15444 - Improve our handling of the cases where OpenSSL encounters a
15445 memory error while encoding keys and certificates. We haven't
15446 observed these errors in the wild, but if they do happen, we now
15447 detect and respond better. Fixes bug 19418; bugfix on all versions
15448 of Tor. Reported by Guido Vranken.
15450 o Minor bugfixes (stability):
15451 - Avoid crashing on a double-free when unable to load or process an
15452 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
15453 with the clang static analyzer.
15455 o Minor bugfixes (testing):
15456 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
15457 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
15458 - Port the hs_ntor handshake test to work correctly with recent
15459 versions of the pysha3 module. Fixes bug 23071; bugfix
15462 o Minor bugfixes (Windows service):
15463 - When running as a Windows service, set the ID of the main thread
15464 correctly. Failure to do so made us fail to send log messages to
15465 the controller in 0.2.1.16-rc, slowed down controller event
15466 delivery in 0.2.7.3-rc and later, and crash with an assertion
15467 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
15468 Patch and diagnosis from "Vort".
15471 Changes in version 0.3.0.10 - 2017-08-02
15472 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
15473 from the current Tor alpha series. OpenBSD users and TPROXY users
15474 should upgrade; others are probably okay sticking with 0.3.0.9.
15476 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
15477 - Tor's repository now includes a Travis Continuous Integration (CI)
15478 configuration file (.travis.yml). This is meant to help new
15479 developers and contributors who fork Tor to a Github repository be
15480 better able to test their changes, and understand what we expect
15481 to pass. To use this new build feature, you must fork Tor to your
15482 Github account, then go into the "Integrations" menu in the
15483 repository settings for your fork and enable Travis, then push
15484 your changes. Closes ticket 22636.
15486 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
15487 - Fix a typo that had prevented TPROXY-based transparent proxying
15488 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15489 Patch from "d4fq0fQAgoJ".
15491 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
15492 - Avoid an assertion failure bug affecting our implementation of
15493 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15494 handling of "0xbar" differs from what we had expected. Fixes bug
15495 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15497 o Minor features (backport from 0.3.1.5-alpha):
15498 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15501 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
15502 - Roll over monthly accounting at the configured hour and minute,
15503 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15504 Found by Andrey Karpov with PVS-Studio.
15506 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
15507 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
15508 bugfix on 0.2.8.1-alpha.
15509 - Fix warnings when building with libscrypt and openssl scrypt
15510 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15511 - When building with certain versions of the mingw C header files,
15512 avoid float-conversion warnings when calling the C functions
15513 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15516 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
15517 - Backport a fix for an "unused variable" warning that appeared
15518 in some versions of mingw. Fixes bug 22838; bugfix on
15521 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
15522 - Avoid Coverity build warnings related to our BUG() macro. By
15523 default, Coverity treats BUG() as the Linux kernel does: an
15524 instant abort(). We need to override that so our BUG() macro
15525 doesn't prevent Coverity from analyzing functions that use it.
15526 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15528 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
15529 - When rejecting a router descriptor for running an obsolete version
15530 of Tor without ntor support, warn about the obsolete tor version,
15531 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15533 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
15534 - Avoid a sandbox failure when trying to re-bind to a socket and
15535 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15537 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
15538 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15539 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15542 Changes in version 0.3.1.5-alpha - 2017-08-01
15543 Tor 0.3.1.5-alpha improves the performance of consensus diff
15544 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
15545 several other bugs. If no serious bugs are found in this version, the
15546 next version will be a release candidate.
15548 This release also marks the end of support for the Tor 0.2.4.x,
15549 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
15550 further bug or security fixes. Anyone still running or distributing
15551 one of those versions should upgrade.
15553 o Major features (build system, continuous integration):
15554 - Tor's repository now includes a Travis Continuous Integration (CI)
15555 configuration file (.travis.yml). This is meant to help new
15556 developers and contributors who fork Tor to a Github repository be
15557 better able to test their changes, and understand what we expect
15558 to pass. To use this new build feature, you must fork Tor to your
15559 Github account, then go into the "Integrations" menu in the
15560 repository settings for your fork and enable Travis, then push
15561 your changes. Closes ticket 22636.
15563 o Major bugfixes (openbsd, denial-of-service):
15564 - Avoid an assertion failure bug affecting our implementation of
15565 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15566 handling of "0xbar" differs from what we had expected. Fixes bug
15567 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15569 o Major bugfixes (relay, performance):
15570 - Perform circuit handshake operations at a higher priority than we
15571 use for consensus diff creation and compression. This should
15572 prevent circuits from starving when a relay or bridge receives a
15573 new consensus, especially on lower-powered machines. Fixes bug
15574 22883; bugfix on 0.3.1.1-alpha.
15576 o Minor features (bridge authority):
15577 - Add "fingerprint" lines to the networkstatus-bridges file produced
15578 by bridge authorities. Closes ticket 22207.
15580 o Minor features (directory cache, consensus diff):
15581 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
15582 operators with low-resource environments to adjust the number of
15583 consensuses they'll store and generate diffs from. Most cache
15584 operators should leave it unchanged. Helps to work around
15587 o Minor features (geoip):
15588 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15591 o Minor features (relay, performance):
15592 - Always start relays with at least two worker threads, to prevent
15593 priority inversion on slow tasks. Part of the fix for bug 22883.
15594 - Allow background work to be queued with different priorities, so
15595 that a big pile of slow low-priority jobs will not starve out
15596 higher priority jobs. This lays the groundwork for a fix for
15599 o Minor bugfixes (build system, rust):
15600 - Fix a problem where Rust toolchains were not being found when
15601 building without --enable-cargo-online-mode, due to setting the
15602 $HOME environment variable instead of $CARGO_HOME. Fixes bug
15603 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
15605 o Minor bugfixes (compatibility, zstd):
15606 - Write zstd epilogues correctly when the epilogue requires
15607 reallocation of the output buffer, even with zstd 1.3.0.
15608 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
15609 22927; bugfix on 0.3.1.1-alpha.
15611 o Minor bugfixes (compilation warnings):
15612 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
15613 22915; bugfix on 0.2.8.1-alpha.
15614 - Fix warnings when building with libscrypt and openssl scrypt
15615 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15616 - Compile correctly when both openssl 1.1.0 and libscrypt are
15617 detected. Previously this would cause an error. Fixes bug 22892;
15618 bugfix on 0.3.1.1-alpha.
15619 - When building with certain versions of the mingw C header files,
15620 avoid float-conversion warnings when calling the C functions
15621 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15624 o Minor bugfixes (coverity build support):
15625 - Avoid Coverity build warnings related to our BUG() macro. By
15626 default, Coverity treats BUG() as the Linux kernel does: an
15627 instant abort(). We need to override that so our BUG() macro
15628 doesn't prevent Coverity from analyzing functions that use it.
15629 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15631 o Minor bugfixes (directory authority):
15632 - When a directory authority rejects a descriptor or extrainfo with
15633 a given digest, mark that digest as undownloadable, so that we do
15634 not attempt to download it again over and over. We previously
15635 tried to avoid downloading such descriptors by other means, but we
15636 didn't notice if we accidentally downloaded one anyway. This
15637 behavior became problematic in 0.2.7.2-alpha, when authorities
15638 began pinning Ed25519 keys. Fixes bug 22349; bugfix
15641 o Minor bugfixes (error reporting, windows):
15642 - When formatting Windows error messages, use the English format to
15643 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
15646 o Minor bugfixes (file limits, osx):
15647 - When setting the maximum number of connections allowed by the OS,
15648 always allow some extra file descriptors for other files. Fixes
15649 bug 22797; bugfix on 0.2.0.10-alpha.
15651 o Minor bugfixes (linux seccomp2 sandbox):
15652 - Avoid a sandbox failure when trying to re-bind to a socket and
15653 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15655 o Minor bugfixes (memory leaks):
15656 - Fix a small memory leak when validating a configuration that uses
15657 two or more AF_UNIX sockets for the same port type. Fixes bug
15658 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
15660 o Minor bugfixes (unit tests):
15661 - test_consdiff_base64cmp would fail on OS X because while OS X
15662 follows the standard of (less than zero/zero/greater than zero),
15663 it doesn't follow the convention of (-1/0/+1). Make the test
15664 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
15665 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15666 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15669 Changes in version 0.3.1.4-alpha - 2017-06-29
15670 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
15671 to use a guard that was in the same network family as a chosen exit
15672 relay. This is a security regression; all clients running earlier
15673 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
15676 This release also fixes several other bugs introduced in 0.3.0.x
15677 and 0.3.1.x, including others that can affect bandwidth usage
15680 o New dependencies:
15681 - To build with zstd and lzma support, Tor now requires the
15682 pkg-config tool at build time. (This requirement was new in
15683 0.3.1.1-alpha, but was not noted at the time. Noting it here to
15684 close ticket 22623.)
15686 o Major bugfixes (path selection, security):
15687 - When choosing which guard to use for a circuit, avoid the exit's
15688 family along with the exit itself. Previously, the new guard
15689 selection logic avoided the exit, but did not consider its family.
15690 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15691 006 and CVE-2017-0377.
15693 o Major bugfixes (compression, zstd):
15694 - Correctly detect a full buffer when decompressing a large zstd-
15695 compressed input. Previously, we would sometimes treat a full
15696 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
15698 o Major bugfixes (directory protocol):
15699 - Ensure that we send "304 Not modified" as HTTP status code when a
15700 client is attempting to fetch a consensus or consensus diff, and
15701 the best one we can send them is one they already have. Fixes bug
15702 22702; bugfix on 0.3.1.1-alpha.
15704 o Major bugfixes (entry guards):
15705 - When starting with an old consensus, do not add new entry guards
15706 unless the consensus is "reasonably live" (under 1 day old). Fixes
15707 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15709 o Minor features (bug mitigation, diagnostics, logging):
15710 - Avoid an assertion failure, and log a better error message, when
15711 unable to remove a file from the consensus cache on Windows.
15712 Attempts to mitigate and diagnose bug 22752.
15714 o Minor features (geoip):
15715 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15718 o Minor bugfixes (compression):
15719 - When compressing or decompressing a buffer, check for a failure to
15720 create a compression object. Fixes bug 22626; bugfix
15722 - When decompressing a buffer, check for extra data after the end of
15723 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
15724 - When decompressing an object received over an anonymous directory
15725 connection, if we have already decompressed it using an acceptable
15726 compression method, do not reject it for looking like an
15727 unacceptable compression method. Fixes part of bug 22670; bugfix
15729 - When serving directory votes compressed with zlib, do not claim to
15730 have compressed them with zstd. Fixes bug 22669; bugfix
15732 - When spooling compressed data to an output buffer, don't try to
15733 spool more data when there is no more data to spool and we are not
15734 trying to flush the input. Previously, we would sometimes launch
15735 compression requests with nothing to do, which interferes with our
15736 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
15738 o Minor bugfixes (defensive programming):
15739 - Detect and break out of infinite loops in our compression code. We
15740 don't think that any such loops exist now, but it's best to be
15741 safe. Closes ticket 22672.
15742 - Fix a memset() off the end of an array when packing cells. This
15743 bug should be harmless in practice, since the corrupted bytes are
15744 still in the same structure, and are always padding bytes,
15745 ignored, or immediately overwritten, depending on compiler
15746 behavior. Nevertheless, because the memset()'s purpose is to make
15747 sure that any other cell-handling bugs can't expose bytes to the
15748 network, we need to fix it. Fixes bug 22737; bugfix on
15749 0.2.4.11-alpha. Fixes CID 1401591.
15751 o Minor bugfixes (linux seccomp2 sandbox):
15752 - Permit the fchmod system call, to avoid crashing on startup when
15753 starting with the seccomp2 sandbox and an unexpected set of
15754 permissions on the data directory or its contents. Fixes bug
15755 22516; bugfix on 0.2.5.4-alpha.
15756 - Fix a crash in the LZMA module, when the sandbox was enabled, and
15757 liblzma would allocate more than 16 MB of memory. We solve this by
15758 bumping the mprotect() limit in the sandbox module from 16 MB to
15759 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
15761 o Minor bugfixes (logging):
15762 - When decompressing, do not warn if we fail to decompress using a
15763 compression method that we merely guessed. Fixes part of bug
15764 22670; bugfix on 0.1.1.14-alpha.
15765 - When decompressing, treat mismatch between content-encoding and
15766 actual compression type as a protocol warning. Fixes part of bug
15767 22670; bugfix on 0.1.1.9-alpha.
15768 - Downgrade "assigned_to_cpuworker failed" message to info-level
15769 severity. In every case that can reach it, either a better warning
15770 has already been logged, or no warning is warranted. Fixes bug
15771 22356; bugfix on 0.2.6.3-alpha.
15772 - Demote a warn that was caused by libevent delays to info if
15773 netflow padding is less than 4.5 seconds late, or to notice
15774 if it is more (4.5 seconds is the amount of time that a netflow
15775 record might be emitted after, if we chose the maximum timeout).
15776 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
15778 o Minor bugfixes (process behavior):
15779 - When exiting because of an error, always exit with a nonzero exit
15780 status. Previously, we would fail to report an error in our exit
15781 status in cases related to __OwningControllerProcess failure,
15782 lockfile contention, and Ed25519 key initialization. Fixes bug
15783 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
15784 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
15788 - Add a manpage description for the key-pinning-journal file. Closes
15790 - Correctly note that bandwidth accounting values are stored in the
15791 state file, and the bw_accounting file is now obsolete. Closes
15793 - Document more of the files in the Tor data directory, including
15794 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
15795 approved-routers, sr-random, and diff-cache. Found while fixing
15799 Changes in version 0.3.0.9 - 2017-06-29
15800 Tor 0.3.0.9 fixes a path selection bug that would allow a client
15801 to use a guard that was in the same network family as a chosen exit
15802 relay. This is a security regression; all clients running earlier
15803 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
15806 This release also backports several other bugfixes from the 0.3.1.x
15809 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
15810 - When choosing which guard to use for a circuit, avoid the exit's
15811 family along with the exit itself. Previously, the new guard
15812 selection logic avoided the exit, but did not consider its family.
15813 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15814 006 and CVE-2017-0377.
15816 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
15817 - Don't block bootstrapping when a primary bridge is offline and we
15818 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15819 21969; bugfix on 0.3.0.3-alpha.
15821 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
15822 - When starting with an old consensus, do not add new entry guards
15823 unless the consensus is "reasonably live" (under 1 day old). Fixes
15824 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15826 o Minor features (geoip):
15827 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15830 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15831 - Reject version numbers with non-numeric prefixes (such as +, -, or
15832 whitespace). Disallowing whitespace prevents differential version
15833 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15834 and part of 21508; bugfix on 0.0.8pre1.
15836 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15837 - Permit the fchmod system call, to avoid crashing on startup when
15838 starting with the seccomp2 sandbox and an unexpected set of
15839 permissions on the data directory or its contents. Fixes bug
15840 22516; bugfix on 0.2.5.4-alpha.
15842 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
15843 - Fix a memset() off the end of an array when packing cells. This
15844 bug should be harmless in practice, since the corrupted bytes are
15845 still in the same structure, and are always padding bytes,
15846 ignored, or immediately overwritten, depending on compiler
15847 behavior. Nevertheless, because the memset()'s purpose is to make
15848 sure that any other cell-handling bugs can't expose bytes to the
15849 network, we need to fix it. Fixes bug 22737; bugfix on
15850 0.2.4.11-alpha. Fixes CID 1401591.
15853 Changes in version 0.3.1.3-alpha - 2017-06-08
15854 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
15855 remotely crash a hidden service with an assertion failure. Anyone
15856 running a hidden service should upgrade to this version, or to some
15857 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15859 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
15860 that sometimes made relays unreliable, as well as several other
15861 bugfixes described below.
15863 o Major bugfixes (hidden service, relay, security):
15864 - Fix a remotely triggerable assertion failure when a hidden service
15865 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15866 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15867 - Fix a remotely triggerable assertion failure caused by receiving a
15868 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15869 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15872 o Major bugfixes (relay, link handshake):
15873 - When performing the v3 link handshake on a TLS connection, report
15874 that we have the x509 certificate that we actually used on that
15875 connection, even if we have changed certificates since that
15876 connection was first opened. Previously, we would claim to have
15877 used our most recent x509 link certificate, which would sometimes
15878 make the link handshake fail. Fixes one case of bug 22460; bugfix
15881 o Major bugfixes (relays, key management):
15882 - Regenerate link and authentication certificates whenever the key
15883 that signs them changes; also, regenerate link certificates
15884 whenever the signed key changes. Previously, these processes were
15885 only weakly coupled, and we relays could (for minutes to hours)
15886 wind up with an inconsistent set of keys and certificates, which
15887 other relays would not accept. Fixes two cases of bug 22460;
15888 bugfix on 0.3.0.1-alpha.
15889 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15890 send the certificate that matches the x509 certificate that we
15891 used on the TLS connection. Previously, there was a race condition
15892 if the TLS context rotated after we began the TLS handshake but
15893 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15896 o Major bugfixes (torrc, crash):
15897 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
15898 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
15900 o Minor features (code style):
15901 - Add "Falls through" comments to our codebase, in order to silence
15902 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15903 Stieger. Closes ticket 22446.
15905 o Minor features (diagnostic):
15906 - Add logging messages to try to diagnose a rare bug that seems to
15907 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
15908 think this is happening because of incorrect system clocks, but
15909 we'd like to know for certain. Diagnostic for bug 22466.
15911 o Minor bugfixes (correctness):
15912 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15913 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15915 o Minor bugfixes (directory protocol):
15916 - Check for libzstd >= 1.1, because older versions lack the
15917 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
15919 o Minor bugfixes (link handshake):
15920 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15921 months, and regenerate it when it is within one month of expiring.
15922 Previously, we had generated this certificate at startup with a
15923 ten-year lifetime, but that could lead to weird behavior when Tor
15924 was started with a grossly inaccurate clock. Mitigates bug 22466;
15925 mitigation on 0.3.0.1-alpha.
15927 o Minor bugfixes (storage directories):
15928 - Always check for underflows in the cached storage directory usage.
15929 If the usage does underflow, re-calculate it. Also, avoid a
15930 separate underflow when the usage is not known. Fixes bug 22424;
15931 bugfix on 0.3.1.1-alpha.
15933 o Minor bugfixes (unit tests):
15934 - The unit tests now pass on systems where localhost is misconfigured
15935 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
15939 - Clarify the manpage for the (deprecated) torify script. Closes
15942 Changes in version 0.3.0.8 - 2017-06-08
15943 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
15944 remotely crash a hidden service with an assertion failure. Anyone
15945 running a hidden service should upgrade to this version, or to some
15946 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15948 Tor 0.3.0.8 also includes fixes for several key management bugs
15949 that sometimes made relays unreliable, as well as several other
15950 bugfixes described below.
15952 o Major bugfixes (hidden service, relay, security, backport
15953 from 0.3.1.3-alpha):
15954 - Fix a remotely triggerable assertion failure when a hidden service
15955 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15956 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15957 - Fix a remotely triggerable assertion failure caused by receiving a
15958 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15959 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15962 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15963 - When performing the v3 link handshake on a TLS connection, report
15964 that we have the x509 certificate that we actually used on that
15965 connection, even if we have changed certificates since that
15966 connection was first opened. Previously, we would claim to have
15967 used our most recent x509 link certificate, which would sometimes
15968 make the link handshake fail. Fixes one case of bug 22460; bugfix
15971 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
15972 - Regenerate link and authentication certificates whenever the key
15973 that signs them changes; also, regenerate link certificates
15974 whenever the signed key changes. Previously, these processes were
15975 only weakly coupled, and we relays could (for minutes to hours)
15976 wind up with an inconsistent set of keys and certificates, which
15977 other relays would not accept. Fixes two cases of bug 22460;
15978 bugfix on 0.3.0.1-alpha.
15979 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15980 send the certificate that matches the x509 certificate that we
15981 used on the TLS connection. Previously, there was a race condition
15982 if the TLS context rotated after we began the TLS handshake but
15983 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15986 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
15987 - Stop rejecting v3 hidden service descriptors because their size
15988 did not match an old padding rule. Fixes bug 22447; bugfix on
15991 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15992 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15993 December 2016 (of which ~126 were still functional) with a list of
15994 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15995 2017. Resolves ticket 21564.
15997 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
15998 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15999 bug 22252; bugfix on 0.2.9.3-alpha.
16001 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
16002 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16003 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16005 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
16006 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
16007 months, and regenerate it when it is within one month of expiring.
16008 Previously, we had generated this certificate at startup with a
16009 ten-year lifetime, but that could lead to weird behavior when Tor
16010 was started with a grossly inaccurate clock. Mitigates bug 22466;
16011 mitigation on 0.3.0.1-alpha.
16013 o Minor bugfixes (memory leak, directory authority, backport from
16015 - When directory authorities reject a router descriptor due to
16016 keypinning, free the router descriptor rather than leaking the
16017 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
16020 Changes in version 0.2.9.11 - 2017-06-08
16021 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
16022 remotely crash a hidden service with an assertion failure. Anyone
16023 running a hidden service should upgrade to this version, or to some
16024 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16025 are not affected by TROVE-2017-004.)
16027 Tor 0.2.9.11 also backports fixes for several key management bugs
16028 that sometimes made relays unreliable, as well as several other
16029 bugfixes described below.
16031 o Major bugfixes (hidden service, relay, security, backport
16032 from 0.3.1.3-alpha):
16033 - Fix a remotely triggerable assertion failure caused by receiving a
16034 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16035 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16038 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
16039 - When performing the v3 link handshake on a TLS connection, report
16040 that we have the x509 certificate that we actually used on that
16041 connection, even if we have changed certificates since that
16042 connection was first opened. Previously, we would claim to have
16043 used our most recent x509 link certificate, which would sometimes
16044 make the link handshake fail. Fixes one case of bug 22460; bugfix
16047 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
16048 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
16049 December 2016 (of which ~126 were still functional) with a list of
16050 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
16051 2017. Resolves ticket 21564.
16053 o Minor features (future-proofing, backport from 0.3.0.7):
16054 - Tor no longer refuses to download microdescriptors or descriptors if
16055 they are listed as "published in the future". This change will
16056 eventually allow us to stop listing meaningful "published" dates
16057 in microdescriptor consensuses, and thereby allow us to reduce the
16058 resources required to download consensus diffs by over 50%.
16059 Implements part of ticket 21642; implements part of proposal 275.
16061 o Minor features (directory authorities, backport from 0.3.0.4-rc)
16062 - Directory authorities now reject relays running versions
16063 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
16064 suffer from bug 20499 and don't keep their consensus cache
16065 up-to-date. Resolves ticket 20509.
16067 o Minor features (geoip):
16068 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16071 o Minor bugfixes (control port, backport from 0.3.0.6):
16072 - The GETINFO extra-info/digest/<digest> command was broken because
16073 of a wrong base16 decode return value check, introduced when
16074 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
16076 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
16077 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16078 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16080 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
16081 - The getpid() system call is now permitted under the Linux seccomp2
16082 sandbox, to avoid crashing with versions of OpenSSL (and other
16083 libraries) that attempt to learn the process's PID by using the
16084 syscall rather than the VDSO code. Fixes bug 21943; bugfix
16087 o Minor bugfixes (memory leak, directory authority, backport
16088 from 0.3.1.2-alpha):
16089 - When directory authorities reject a router descriptor due to
16090 keypinning, free the router descriptor rather than leaking the
16091 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
16093 Changes in version 0.2.8.14 - 2017-06-08
16094 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
16095 remotely crash a hidden service with an assertion failure. Anyone
16096 running a hidden service should upgrade to this version, or to some
16097 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16098 are not affected by TROVE-2017-004.)
16100 o Major bugfixes (hidden service, relay, security):
16101 - Fix a remotely triggerable assertion failure caused by receiving a
16102 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16103 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16106 o Minor features (geoip):
16107 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16110 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
16111 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
16112 December 2016 (of which ~126 were still functional) with a list of
16113 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
16114 2017. Resolves ticket 21564.
16116 o Minor bugfixes (correctness):
16117 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16118 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16120 Changes in version 0.2.7.8 - 2017-06-08
16121 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
16122 remotely crash a hidden service with an assertion failure. Anyone
16123 running a hidden service should upgrade to this version, or to some
16124 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16125 are not affected by TROVE-2017-004.)
16127 o Major bugfixes (hidden service, relay, security):
16128 - Fix a remotely triggerable assertion failure caused by receiving a
16129 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16130 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16133 o Minor features (geoip):
16134 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16137 o Minor bugfixes (correctness):
16138 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16139 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16142 Changes in version 0.2.6.12 - 2017-06-08
16143 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
16144 remotely crash a hidden service with an assertion failure. Anyone
16145 running a hidden service should upgrade to this version, or to some
16146 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16147 are not affected by TROVE-2017-004.)
16149 o Major bugfixes (hidden service, relay, security):
16150 - Fix a remotely triggerable assertion failure caused by receiving a
16151 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16152 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16155 o Minor features (geoip):
16156 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16159 o Minor bugfixes (correctness):
16160 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16161 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16163 Changes in version 0.2.5.14 - 2017-06-08
16164 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
16165 remotely crash a hidden service with an assertion failure. Anyone
16166 running a hidden service should upgrade to this version, or to some
16167 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16168 are not affected by TROVE-2017-004.)
16170 o Major bugfixes (hidden service, relay, security):
16171 - Fix a remotely triggerable assertion failure caused by receiving a
16172 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16173 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16176 o Minor features (geoip):
16177 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16180 o Minor bugfixes (correctness):
16181 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16182 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16184 Changes in version 0.2.4.29 - 2017-06-08
16185 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
16186 remotely crash a hidden service with an assertion failure. Anyone
16187 running a hidden service should upgrade to this version, or to some
16188 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16189 are not affected by TROVE-2017-004.)
16191 o Major bugfixes (hidden service, relay, security):
16192 - Fix a remotely triggerable assertion failure caused by receiving a
16193 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16194 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16197 o Minor features (geoip):
16198 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16201 o Minor bugfixes (correctness):
16202 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16203 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16206 Changes in version 0.3.1.2-alpha - 2017-05-26
16207 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
16208 fixes a few bugs found while testing 0.3.1.1-alpha, including a
16209 memory corruption bug that affected relay stability.
16211 o Major bugfixes (crash, relay):
16212 - Fix a memory-corruption bug in relays that set MyFamily.
16213 Previously, they would double-free MyFamily elements when making
16214 the next descriptor or when changing their configuration. Fixes
16215 bug 22368; bugfix on 0.3.1.1-alpha.
16217 o Minor bugfixes (logging):
16218 - Log a better message when a directory authority replies to an
16219 upload with an unexpected status code. Fixes bug 11121; bugfix
16222 o Minor bugfixes (memory leak, directory authority):
16223 - When directory authorities reject a router descriptor due to
16224 keypinning, free the router descriptor rather than leaking the
16225 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
16228 Changes in version 0.3.1.1-alpha - 2017-05-22
16229 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
16230 reduces the bandwidth usage for Tor's directory protocol, adds some
16231 basic padding to resist netflow-based traffic analysis and to serve as
16232 the basis of other padding in the future, and adds rust support to the
16235 It also contains numerous other small features and improvements to
16236 security, correctness, and performance.
16238 Below are the changes since 0.3.0.7.
16240 o Major features (directory protocol):
16241 - Tor relays and authorities can now serve clients an abbreviated
16242 version of the consensus document, containing only the changes
16243 since an older consensus document that the client holds. Clients
16244 now request these documents when available. When both client and
16245 server use this new protocol, they will use far less bandwidth (up
16246 to 94% less) to keep the client's consensus up-to-date. Implements
16247 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
16248 - Tor can now compress directory traffic with lzma or with zstd
16249 compression algorithms, which can deliver better bandwidth
16250 performance. Because lzma is computationally expensive, it's only
16251 used for documents that can be compressed once and served many
16252 times. Support for these algorithms requires that tor is built
16253 with the libzstd and/or liblzma libraries available. Implements
16254 proposal 278; closes ticket 21662.
16255 - Relays now perform the more expensive compression operations, and
16256 consensus diff generation, in worker threads. This separation
16257 avoids delaying the main thread when a new consensus arrives.
16259 o Major features (experimental):
16260 - Tor can now build modules written in Rust. To turn this on, pass
16261 the "--enable-rust" flag to the configure script. It's not time to
16262 get excited yet: currently, there is no actual Rust functionality
16263 beyond some simple glue code, and a notice at startup to tell you
16264 that Rust is running. Still, we hope that programmers and
16265 packagers will try building Tor with Rust support, so that we can
16266 find issues and solve portability problems. Closes ticket 22106.
16268 o Major features (traffic analysis resistance):
16269 - Connections between clients and relays now send a padding cell in
16270 each direction every 1.5 to 9.5 seconds (tunable via consensus
16271 parameters). This padding will not resist specialized
16272 eavesdroppers, but it should be enough to make many ISPs' routine
16273 network flow logging less useful in traffic analysis against
16276 Padding is negotiated using Tor's link protocol, so both relays
16277 and clients must upgrade for this to take effect. Clients may
16278 still send padding despite the relay's version by setting
16279 ConnectionPadding 1 in torrc, and may disable padding by setting
16280 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
16281 users with the torrc option ReducedConnectionPadding. Implements
16282 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
16283 - Relays will publish 24 hour totals of padding and non-padding cell
16284 counts to their extra-info descriptors, unless PaddingStatistics 0
16285 is set in torrc. These 24 hour totals are also rounded to
16286 multiples of 10000.
16288 o Major bugfixes (connection usage):
16289 - We use NETINFO cells to try to determine if both relays involved
16290 in a connection will agree on the canonical status of that
16291 connection. We prefer the connections where this is the case for
16292 extend cells, and try to close connections where relays disagree
16293 on their canonical status early. Also, we now prefer the oldest
16294 valid connection for extend cells. These two changes should reduce
16295 the number of long-term connections that are kept open between
16296 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
16297 - Relays now log hourly statistics (look for
16298 "channel_check_for_duplicates" lines) on the total number of
16299 connections to other relays. If the number of connections per
16300 relay is unexpectedly large, this log message is at notice level.
16301 Otherwise it is at info.
16303 o Major bugfixes (entry guards):
16304 - Don't block bootstrapping when a primary bridge is offline and we
16305 can't get its descriptor. Fixes bug 22325; fixes one case of bug
16306 21969; bugfix on 0.3.0.3-alpha.
16308 o Major bugfixes (linux TPROXY support):
16309 - Fix a typo that had prevented TPROXY-based transparent proxying
16310 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
16311 Patch from "d4fq0fQAgoJ".
16313 o Minor features (security, windows):
16314 - Enable a couple of pieces of Windows hardening: one
16315 (HeapEnableTerminationOnCorruption) that has been on-by-default
16316 since Windows 8, and unavailable before Windows 7; and one
16317 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
16318 affect us, but shouldn't do any harm. Closes ticket 21953.
16320 o Minor features (config options):
16321 - Allow "%include" directives in torrc configuration files. These
16322 directives import the settings from other files, or from all the
16323 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
16324 - Make SAVECONF return an error when overwriting a torrc that has
16325 includes. Using SAVECONF with the FORCE option will allow it to
16326 overwrite torrc even if includes are used. Related to ticket 1922.
16327 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
16328 will work without the FORCE option. Related to ticket 1922.
16330 o Minor features (controller):
16331 - Warn the first time that a controller requests data in the long-
16332 deprecated 'GETINFO network-status' format. Closes ticket 21703.
16334 o Minor features (defaults):
16335 - The default value for UseCreateFast is now 0: clients which
16336 haven't yet received a consensus document will now use a proper
16337 ntor handshake to talk to their directory servers whenever they
16338 can. Closes ticket 21407.
16339 - Onion key rotation and expiry intervals are now defined as a
16340 network consensus parameter, per proposal 274. The default
16341 lifetime of an onion key is increased from 7 to 28 days. Old onion
16342 keys will expire after 7 days by default. This change will make
16343 consensus diffs much smaller, and save significant bandwidth.
16344 Closes ticket 21641.
16346 o Minor features (fallback directory list):
16347 - Update the fallback directory mirror whitelist and blacklist based
16348 on operator emails. Closes task 21121.
16349 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
16350 December 2016 (of which ~126 were still functional) with a list of
16351 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
16352 2017. Resolves ticket 21564.
16354 o Minor features (hidden services, logging):
16355 - Log a message when a hidden service descriptor has fewer
16356 introduction points than specified in
16357 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
16358 - Log a message when a hidden service reaches its introduction point
16359 circuit limit, and when that limit is reset. Follow up to ticket
16360 21594; closes ticket 21622.
16361 - Warn user if multiple entries in EntryNodes and at least one
16362 HiddenService are used together. Pinning EntryNodes along with a
16363 hidden service can be possibly harmful; for instance see ticket
16364 14917 or 21155. Closes ticket 21155.
16366 o Minor features (linux seccomp2 sandbox):
16367 - We now have a document storage backend compatible with the Linux
16368 seccomp2 sandbox. This backend is used for consensus documents and
16369 diffs between them; in the long term, we'd like to use it for
16370 unparseable directory material too. Closes ticket 21645
16371 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
16372 from 1MB to 16MB. This was necessary with the glibc allocator in
16373 order to allow worker threads to allocate more memory -- which in
16374 turn is necessary because of our new use of worker threads for
16375 compression. Closes ticket 22096.
16377 o Minor features (logging):
16378 - Log files are no longer created world-readable by default.
16379 (Previously, most distributors would store the logs in a non-
16380 world-readable location to prevent inappropriate access. This
16381 change is an extra precaution.) Closes ticket 21729; patch
16384 o Minor features (performance):
16385 - Our Keccak (SHA-3) implementation now accesses memory more
16386 efficiently, especially on little-endian systems. Closes
16388 - Add an O(1) implementation of channel_find_by_global_id(), to
16389 speed some controller functions.
16391 o Minor features (relay, configuration):
16392 - The MyFamily option may now be repeated as many times as desired,
16393 for relays that want to configure large families. Closes ticket
16394 4998; patch by Daniel Pinto.
16396 o Minor features (safety):
16397 - Add an explicit check to extrainfo_parse_entry_from_string() for
16398 NULL inputs. We don't believe this can actually happen, but it may
16399 help silence a warning from the Clang analyzer. Closes
16402 o Minor features (testing):
16403 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
16404 When Tor is compiled with this option, we disable a number of
16405 redundant memory-safety failsafes that are intended to stop bugs
16406 from becoming security issues. This makes it easier to hunt for
16407 bugs that would be security issues without the failsafes turned
16408 on. Closes ticket 21439.
16409 - Add a general event-tracing instrumentation support to Tor. This
16410 subsystem will enable developers and researchers to add fine-
16411 grained instrumentation to their Tor instances, for use when
16412 examining Tor network performance issues. There are no trace
16413 events yet, and event-tracing is off by default unless enabled at
16414 compile time. Implements ticket 13802.
16415 - Improve our version parsing tests: add tests for typical version
16416 components, add tests for invalid versions, including numeric
16417 range and non-numeric prefixes. Unit tests 21278, 21450, and
16418 21507. Partially implements 21470.
16420 o Minor bugfixes (bandwidth accounting):
16421 - Roll over monthly accounting at the configured hour and minute,
16422 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
16423 Found by Andrey Karpov with PVS-Studio.
16425 o Minor bugfixes (code correctness):
16426 - Accurately identify client connections by their lack of peer
16427 authentication. This means that we bail out earlier if asked to
16428 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
16431 o Minor bugfixes (configuration):
16432 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
16433 bug 22252; bugfix on 0.2.9.3-alpha.
16435 o Minor bugfixes (connection lifespan):
16436 - Allow more control over how long TLS connections are kept open:
16437 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
16438 single option called CircuitsAvailableTimeout. Also, allow the
16439 consensus to control the default values for both this preference
16440 and the lifespan of relay-to-relay connections. Fixes bug 17592;
16441 bugfix on 0.2.5.5-alpha.
16442 - Increase the initial circuit build timeout testing frequency, to
16443 help ensure that ReducedConnectionPadding clients finish learning
16444 a timeout before their orconn would expire. The initial testing
16445 rate was set back in the days of TAP and before the Tor Browser
16446 updater, when we had to be much more careful about new clients
16447 making lots of circuits. With this change, a circuit build timeout
16448 is learned in about 15-20 minutes, instead of 100-120 minutes.
16450 o Minor bugfixes (controller):
16451 - GETINFO onions/current and onions/detached no longer respond with
16452 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
16453 - Trigger HS descriptor events on the control port when the client
16454 fails to pick a hidden service directory for a hidden service.
16455 This can happen if all the hidden service directories are in
16456 ExcludeNodes, or they have all been queried within the last 15
16457 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
16459 o Minor bugfixes (directory authority):
16460 - When rejecting a router descriptor for running an obsolete version
16461 of Tor without ntor support, warn about the obsolete tor version,
16462 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
16463 - Prevent the shared randomness subsystem from asserting when
16464 initialized by a bridge authority with an incomplete configuration
16465 file. Fixes bug 21586; bugfix on 0.2.9.8.
16467 o Minor bugfixes (exit-side DNS):
16468 - Fix an untriggerable assertion that checked the output of a
16469 libevent DNS error, so that the assertion actually behaves as
16470 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
16471 Karpov using PVS-Studio.
16473 o Minor bugfixes (fallback directories):
16474 - Make the usage example in updateFallbackDirs.py actually work, and
16475 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
16476 - Decrease the guard flag average required to be a fallback. This
16477 allows us to keep relays that have their guard flag removed when
16478 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
16479 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
16480 bugfix on 0.2.8.1-alpha.
16481 - Make sure fallback directory mirrors have the same address, port,
16482 and relay identity key for at least 30 days before they are
16483 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
16485 o Minor bugfixes (hidden services):
16486 - Stop printing a cryptic warning when a hidden service gets a
16487 request to connect to a virtual port that it hasn't configured.
16488 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
16489 - Simplify hidden service descriptor creation by using an existing
16490 flag to check if an introduction point is established. Fixes bug
16491 21599; bugfix on 0.2.7.2-alpha.
16493 o Minor bugfixes (memory leak):
16494 - Fix a small memory leak at exit from the backtrace handler code.
16495 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
16497 o Minor bugfixes (protocol, logging):
16498 - Downgrade a log statement about unexpected relay cells from "bug"
16499 to "protocol warning", because there is at least one use case
16500 where it can be triggered by a buggy tor implementation. Fixes bug
16501 21293; bugfix on 0.1.1.14-alpha.
16503 o Minor bugfixes (testing):
16504 - Use unbuffered I/O for utility functions around the
16505 process_handle_t type. This fixes unit test failures reported on
16506 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
16507 - Make display of captured unit test log messages consistent. Fixes
16508 bug 21510; bugfix on 0.2.9.3-alpha.
16509 - Make test-network.sh always call chutney's test-network.sh.
16510 Previously, this only worked on systems which had bash installed,
16511 due to some bash-specific code in the script. Fixes bug 19699;
16512 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
16514 o Minor bugfixes (voting consistency):
16515 - Reject version numbers with non-numeric prefixes (such as +, -, or
16516 whitespace). Disallowing whitespace prevents differential version
16517 parsing between POSIX-based and Windows platforms. Fixes bug 21507
16518 and part of 21508; bugfix on 0.0.8pre1.
16520 o Minor bugfixes (windows, relay):
16521 - Resolve "Failure from drain_fd: No error" warnings on Windows
16522 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
16524 o Code simplification and refactoring:
16525 - Break up the 630-line function connection_dir_client_reached_eof()
16526 into a dozen smaller functions. This change should help
16527 maintainability and readability of the client directory code.
16528 - Isolate our use of the openssl headers so that they are only
16529 included from our crypto wrapper modules, and from tests that
16530 examine those modules' internals. Closes ticket 21841.
16531 - Simplify our API to launch directory requests, making it more
16532 extensible and less error-prone. Now it's easier to add extra
16533 headers to directory requests. Closes ticket 21646.
16534 - Our base64 decoding functions no longer overestimate the output
16535 space that they need when parsing unpadded inputs. Closes
16537 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
16538 Resolves ticket 22213.
16539 - The logic that directory caches use to spool request to clients,
16540 serving them one part at a time so as not to allocate too much
16541 memory, has been refactored for consistency. Previously there was
16542 a separate spooling implementation per type of spoolable data. Now
16543 there is one common spooling implementation, with extensible data
16544 types. Closes ticket 21651.
16545 - Tor's compression module now supports multiple backends. Part of
16546 the implementation for proposal 278; closes ticket 21663.
16549 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
16550 Closes ticket 21873.
16551 - Correct documentation about the default DataDirectory value.
16552 Closes ticket 21151.
16553 - Document the default behavior of NumEntryGuards and
16554 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
16556 - Document key=value pluggable transport arguments for Bridge lines
16557 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
16558 - Note that bandwidth-limiting options don't affect TCP headers or
16559 DNS. Closes ticket 17170.
16561 o Removed features (configuration options, all in ticket 22060):
16562 - These configuration options are now marked Obsolete, and no longer
16563 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
16564 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
16565 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
16566 in 0.2.9.2-alpha and have now been removed. The previous default
16567 behavior is now always chosen; the previous (less secure) non-
16568 default behavior is now unavailable.
16569 - CloseHSClientCircuitsImmediatelyOnTimeout and
16570 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
16571 0.2.9.2-alpha and now have been removed. HS circuits never close
16572 on circuit build timeout; they have a longer timeout period.
16573 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
16574 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
16575 (and others) to configure listen-only and advertise-only addresses.
16577 o Removed features (tools):
16578 - We've removed the tor-checkkey tool from src/tools. Long ago, we
16579 used it to help people detect RSA keys that were generated by
16580 versions of Debian affected by CVE-2008-0166. But those keys have
16581 been out of circulation for ages, and this tool is no longer
16582 required. Closes ticket 21842.
16585 Changes in version 0.3.0.7 - 2017-05-15
16586 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
16587 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
16588 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
16589 clients are not affected.
16591 o Major bugfixes (hidden service directory, security):
16592 - Fix an assertion failure in the hidden service directory code, which
16593 could be used by an attacker to remotely cause a Tor relay process to
16594 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
16595 should upgrade. This security issue is tracked as TROVE-2017-002.
16596 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
16599 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16602 o Minor features (future-proofing):
16603 - Tor no longer refuses to download microdescriptors or descriptors
16604 if they are listed as "published in the future". This change will
16605 eventually allow us to stop listing meaningful "published" dates
16606 in microdescriptor consensuses, and thereby allow us to reduce the
16607 resources required to download consensus diffs by over 50%.
16608 Implements part of ticket 21642; implements part of proposal 275.
16610 o Minor bugfixes (Linux seccomp2 sandbox):
16611 - The getpid() system call is now permitted under the Linux seccomp2
16612 sandbox, to avoid crashing with versions of OpenSSL (and other
16613 libraries) that attempt to learn the process's PID by using the
16614 syscall rather than the VDSO code. Fixes bug 21943; bugfix
16618 Changes in version 0.3.0.6 - 2017-04-26
16619 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
16621 With the 0.3.0 series, clients and relays now use Ed25519 keys to
16622 authenticate their link connections to relays, rather than the old
16623 RSA1024 keys that they used before. (Circuit crypto has been
16624 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
16625 the guard selection and replacement algorithm to behave more robustly
16626 in the presence of unreliable networks, and to resist guard-
16629 This series also includes numerous other small features and bugfixes,
16630 along with more groundwork for the upcoming hidden-services revamp.
16632 Per our stable release policy, we plan to support the Tor 0.3.0
16633 release series for at least the next nine months, or for three months
16634 after the first stable release of the 0.3.1 series: whichever is
16635 longer. If you need a release with long-term support, we recommend
16636 that you stay with the 0.2.9 series.
16638 Below are the changes since 0.3.0.5-rc. For a list of all changes
16639 since 0.2.9, see the ReleaseNotes file.
16641 o Minor features (geoip):
16642 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
16645 o Minor bugfixes (control port):
16646 - The GETINFO extra-info/digest/<digest> command was broken because
16647 of a wrong base16 decode return value check, introduced when
16648 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
16650 o Minor bugfixes (crash prevention):
16651 - Fix a (currently untriggerable, but potentially dangerous) crash
16652 bug when base32-encoding inputs whose sizes are not a multiple of
16653 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
16656 Changes in version 0.3.0.5-rc - 2017-04-05
16657 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
16658 0.3.0 release series.
16660 This is the second release candidate in the Tor 0.3.0 series, and has
16661 much fewer changes than the first. If we find no new bugs or
16662 regressions here, the first stable 0.3.0 release will be nearly
16665 o Major bugfixes (crash, directory connections):
16666 - Fix a rare crash when sending a begin cell on a circuit whose
16667 linked directory connection had already been closed. Fixes bug
16668 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
16670 o Major bugfixes (guard selection):
16671 - Fix a guard selection bug where Tor would refuse to bootstrap in
16672 some cases if the user swapped a bridge for another bridge in
16673 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
16674 Reported by "torvlnt33r".
16676 o Minor features (geoip):
16677 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
16680 o Minor bugfix (compilation):
16681 - Fix a warning when compiling hs_service.c. Previously, it had no
16682 exported symbols when compiled for libor.a, resulting in a
16683 compilation warning from clang. Fixes bug 21825; bugfix
16686 o Minor bugfixes (hidden services):
16687 - Make hidden services check for failed intro point connections,
16688 even when they have exceeded their intro point creation limit.
16689 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
16690 - Make hidden services with 8 to 10 introduction points check for
16691 failed circuits immediately after startup. Previously, they would
16692 wait for 5 minutes before performing their first checks. Fixes bug
16693 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
16695 o Minor bugfixes (memory leaks):
16696 - Fix a memory leak when using GETCONF on a port option. Fixes bug
16697 21682; bugfix on 0.3.0.3-alpha.
16699 o Minor bugfixes (relay):
16700 - Avoid a double-marked-circuit warning that could happen when we
16701 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
16704 o Minor bugfixes (tests):
16705 - Run the entry_guard_parse_from_state_full() test with the time set
16706 to a specific date. (The guard state that this test was parsing
16707 contained guards that had expired since the test was first
16708 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
16711 - Update the description of the directory server options in the
16712 manual page, to clarify that a relay no longer needs to set
16713 DirPort in order to be a directory cache. Closes ticket 21720.
16717 Changes in version 0.2.8.13 - 2017-03-03
16718 Tor 0.2.8.13 backports a security fix from later Tor
16719 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
16720 this release, if for some reason they cannot upgrade to a later
16721 release series, and if they build Tor with the --enable-expensive-hardening
16724 Note that support for Tor 0.2.8.x is ending next year: we will not issue
16725 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
16726 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16728 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16729 - Fix an integer underflow bug when comparing malformed Tor
16730 versions. This bug could crash Tor when built with
16731 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16732 0.2.9.8, which were built with -ftrapv by default. In other cases
16733 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16734 on 0.0.8pre1. Found by OSS-Fuzz.
16736 o Minor features (geoip):
16737 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16741 Changes in version 0.2.7.7 - 2017-03-03
16742 Tor 0.2.7.7 backports a number of security fixes from later Tor
16743 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
16744 this release, if for some reason they cannot upgrade to a later
16747 Note that support for Tor 0.2.7.x is ending this year: we will not issue
16748 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
16749 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16751 o Directory authority changes (backport from 0.2.8.5-rc):
16752 - Urras is no longer a directory authority. Closes ticket 19271.
16754 o Directory authority changes (backport from 0.2.9.2-alpha):
16755 - The "Tonga" bridge authority has been retired; the new bridge
16756 authority is "Bifroest". Closes tickets 19728 and 19690.
16758 o Directory authority key updates (backport from 0.2.8.1-alpha):
16759 - Update the V3 identity key for the dannenberg directory authority:
16760 it was changed on 18 November 2015. Closes task 17906. Patch
16763 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16764 - Fix a bug in parsing that could cause clients to read a single
16765 byte past the end of an allocated region. This bug could be used
16766 to cause hardened clients (built with --enable-expensive-hardening)
16767 to crash if they tried to visit a hostile hidden service. Non-
16768 hardened clients are only affected depending on the details of
16769 their platform's memory allocator. Fixes bug 21018; bugfix on
16770 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16771 2016-12-002 and as CVE-2016-1254.
16773 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16774 - Stop a crash that could occur when a client running with DNSPort
16775 received a query with multiple address types, and the first
16776 address type was not supported. Found and fixed by Scott Dial.
16777 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16778 - Prevent a class of security bugs caused by treating the contents
16779 of a buffer chunk as if they were a NUL-terminated string. At
16780 least one such bug seems to be present in all currently used
16781 versions of Tor, and would allow an attacker to remotely crash
16782 most Tor instances, especially those compiled with extra compiler
16783 hardening. With this defense in place, such bugs can't crash Tor,
16784 though we should still fix them as they occur. Closes ticket
16785 20384 (TROVE-2016-10-001).
16787 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16788 - Avoid a difficult-to-trigger heap corruption attack when extending
16789 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16790 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16791 Reported by Guido Vranken.
16793 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16794 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16795 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16797 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16798 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16799 pointer to the previous (uninitialized) key value. The impact here
16800 should be limited to a difficult-to-trigger crash, if OpenSSL is
16801 running an engine that makes key generation failures possible, or
16802 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16803 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16806 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16807 - Fix an integer underflow bug when comparing malformed Tor
16808 versions. This bug could crash Tor when built with
16809 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16810 0.2.9.8, which were built with -ftrapv by default. In other cases
16811 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16812 on 0.0.8pre1. Found by OSS-Fuzz.
16814 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16815 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16816 zero size. Check size argument to memwipe() for underflow. Fixes
16817 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16820 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16821 - Make Tor survive errors involving connections without a
16822 corresponding event object. Previously we'd fail with an
16823 assertion; now we produce a log message. Related to bug 16248.
16825 o Minor features (geoip):
16826 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16830 Changes in version 0.2.6.11 - 2017-03-03
16831 Tor 0.2.6.11 backports a number of security fixes from later Tor
16832 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
16833 this release, if for some reason they cannot upgrade to a later
16836 Note that support for Tor 0.2.6.x is ending this year: we will not issue
16837 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
16838 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16840 o Directory authority changes (backport from 0.2.8.5-rc):
16841 - Urras is no longer a directory authority. Closes ticket 19271.
16843 o Directory authority changes (backport from 0.2.9.2-alpha):
16844 - The "Tonga" bridge authority has been retired; the new bridge
16845 authority is "Bifroest". Closes tickets 19728 and 19690.
16847 o Directory authority key updates (backport from 0.2.8.1-alpha):
16848 - Update the V3 identity key for the dannenberg directory authority:
16849 it was changed on 18 November 2015. Closes task 17906. Patch
16852 o Major features (security fixes, backport from 0.2.9.4-alpha):
16853 - Prevent a class of security bugs caused by treating the contents
16854 of a buffer chunk as if they were a NUL-terminated string. At
16855 least one such bug seems to be present in all currently used
16856 versions of Tor, and would allow an attacker to remotely crash
16857 most Tor instances, especially those compiled with extra compiler
16858 hardening. With this defense in place, such bugs can't crash Tor,
16859 though we should still fix them as they occur. Closes ticket
16860 20384 (TROVE-2016-10-001).
16862 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16863 - Fix a bug in parsing that could cause clients to read a single
16864 byte past the end of an allocated region. This bug could be used
16865 to cause hardened clients (built with --enable-expensive-hardening)
16866 to crash if they tried to visit a hostile hidden service. Non-
16867 hardened clients are only affected depending on the details of
16868 their platform's memory allocator. Fixes bug 21018; bugfix on
16869 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16870 2016-12-002 and as CVE-2016-1254.
16872 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16873 - Stop a crash that could occur when a client running with DNSPort
16874 received a query with multiple address types, and the first
16875 address type was not supported. Found and fixed by Scott Dial.
16876 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16878 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16879 - Fix an error that could cause us to read 4 bytes before the
16880 beginning of an openssl string. This bug could be used to cause
16881 Tor to crash on systems with unusual malloc implementations, or
16882 systems with unusual hardening installed. Fixes bug 17404; bugfix
16885 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16886 - Avoid a difficult-to-trigger heap corruption attack when extending
16887 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16888 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16889 Reported by Guido Vranken.
16891 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16892 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16893 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16895 o Major bugfixes (guard selection, backport from 0.2.7.6):
16896 - Actually look at the Guard flag when selecting a new directory
16897 guard. When we implemented the directory guard design, we
16898 accidentally started treating all relays as if they have the Guard
16899 flag during guard selection, leading to weaker anonymity and worse
16900 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16903 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16904 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16905 pointer to the previous (uninitialized) key value. The impact here
16906 should be limited to a difficult-to-trigger crash, if OpenSSL is
16907 running an engine that makes key generation failures possible, or
16908 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16909 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16912 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16913 - Fix an integer underflow bug when comparing malformed Tor
16914 versions. This bug could crash Tor when built with
16915 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16916 0.2.9.8, which were built with -ftrapv by default. In other cases
16917 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16918 on 0.0.8pre1. Found by OSS-Fuzz.
16920 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16921 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16922 zero size. Check size argument to memwipe() for underflow. Fixes
16923 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16926 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16927 - Make Tor survive errors involving connections without a
16928 corresponding event object. Previously we'd fail with an
16929 assertion; now we produce a log message. Related to bug 16248.
16931 o Minor features (geoip):
16932 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16935 o Minor bugfixes (compilation, backport from 0.2.7.6):
16936 - Fix a compilation warning with Clang 3.6: Do not check the
16937 presence of an address which can never be NULL. Fixes bug 17781.
16940 Changes in version 0.2.5.13 - 2017-03-03
16941 Tor 0.2.5.13 backports a number of security fixes from later Tor
16942 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
16943 this release, if for some reason they cannot upgrade to a later
16946 Note that support for Tor 0.2.5.x is ending next year: we will not issue
16947 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
16948 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16950 o Directory authority changes (backport from 0.2.8.5-rc):
16951 - Urras is no longer a directory authority. Closes ticket 19271.
16953 o Directory authority changes (backport from 0.2.9.2-alpha):
16954 - The "Tonga" bridge authority has been retired; the new bridge
16955 authority is "Bifroest". Closes tickets 19728 and 19690.
16957 o Directory authority key updates (backport from 0.2.8.1-alpha):
16958 - Update the V3 identity key for the dannenberg directory authority:
16959 it was changed on 18 November 2015. Closes task 17906. Patch
16962 o Major features (security fixes, backport from 0.2.9.4-alpha):
16963 - Prevent a class of security bugs caused by treating the contents
16964 of a buffer chunk as if they were a NUL-terminated string. At
16965 least one such bug seems to be present in all currently used
16966 versions of Tor, and would allow an attacker to remotely crash
16967 most Tor instances, especially those compiled with extra compiler
16968 hardening. With this defense in place, such bugs can't crash Tor,
16969 though we should still fix them as they occur. Closes ticket
16970 20384 (TROVE-2016-10-001).
16972 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16973 - Fix a bug in parsing that could cause clients to read a single
16974 byte past the end of an allocated region. This bug could be used
16975 to cause hardened clients (built with --enable-expensive-hardening)
16976 to crash if they tried to visit a hostile hidden service. Non-
16977 hardened clients are only affected depending on the details of
16978 their platform's memory allocator. Fixes bug 21018; bugfix on
16979 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16980 2016-12-002 and as CVE-2016-1254.
16982 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16983 - Stop a crash that could occur when a client running with DNSPort
16984 received a query with multiple address types, and the first
16985 address type was not supported. Found and fixed by Scott Dial.
16986 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16988 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16989 - Fix an error that could cause us to read 4 bytes before the
16990 beginning of an openssl string. This bug could be used to cause
16991 Tor to crash on systems with unusual malloc implementations, or
16992 systems with unusual hardening installed. Fixes bug 17404; bugfix
16995 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16996 - Avoid a difficult-to-trigger heap corruption attack when extending
16997 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16998 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16999 Reported by Guido Vranken.
17001 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
17002 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
17003 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
17005 o Major bugfixes (guard selection, backport from 0.2.7.6):
17006 - Actually look at the Guard flag when selecting a new directory
17007 guard. When we implemented the directory guard design, we
17008 accidentally started treating all relays as if they have the Guard
17009 flag during guard selection, leading to weaker anonymity and worse
17010 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
17013 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
17014 - If OpenSSL fails to generate an RSA key, do not retain a dangling
17015 pointer to the previous (uninitialized) key value. The impact here
17016 should be limited to a difficult-to-trigger crash, if OpenSSL is
17017 running an engine that makes key generation failures possible, or
17018 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
17019 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
17022 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
17023 - Fix an integer underflow bug when comparing malformed Tor
17024 versions. This bug could crash Tor when built with
17025 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
17026 0.2.9.8, which were built with -ftrapv by default. In other cases
17027 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
17028 on 0.0.8pre1. Found by OSS-Fuzz.
17030 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
17031 - Make memwipe() do nothing when passed a NULL pointer or buffer of
17032 zero size. Check size argument to memwipe() for underflow. Fixes
17033 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
17036 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
17037 - Make Tor survive errors involving connections without a
17038 corresponding event object. Previously we'd fail with an
17039 assertion; now we produce a log message. Related to bug 16248.
17041 o Minor features (geoip):
17042 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
17045 o Minor bugfixes (compilation, backport from 0.2.7.6):
17046 - Fix a compilation warning with Clang 3.6: Do not check the
17047 presence of an address which can never be NULL. Fixes bug 17781.
17049 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
17050 - Check for failures from crypto_early_init, and refuse to continue.
17051 A previous typo meant that we could keep going with an
17052 uninitialized crypto library, and would have OpenSSL initialize
17053 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
17054 when implementing ticket 4900. Patch by "teor".
17056 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
17057 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
17058 a client authorized hidden service. Fixes bug 15823; bugfix
17062 Changes in version 0.2.4.28 - 2017-03-03
17063 Tor 0.2.4.28 backports a number of security fixes from later Tor
17064 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
17065 this release, if for some reason they cannot upgrade to a later
17068 Note that support for Tor 0.2.4.x is ending soon: we will not issue
17069 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
17070 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
17072 o Directory authority changes (backport from 0.2.8.5-rc):
17073 - Urras is no longer a directory authority. Closes ticket 19271.
17075 o Directory authority changes (backport from 0.2.9.2-alpha):
17076 - The "Tonga" bridge authority has been retired; the new bridge
17077 authority is "Bifroest". Closes tickets 19728 and 19690.
17079 o Directory authority key updates (backport from 0.2.8.1-alpha):
17080 - Update the V3 identity key for the dannenberg directory authority:
17081 it was changed on 18 November 2015. Closes task 17906. Patch
17084 o Major features (security fixes, backport from 0.2.9.4-alpha):
17085 - Prevent a class of security bugs caused by treating the contents
17086 of a buffer chunk as if they were a NUL-terminated string. At
17087 least one such bug seems to be present in all currently used
17088 versions of Tor, and would allow an attacker to remotely crash
17089 most Tor instances, especially those compiled with extra compiler
17090 hardening. With this defense in place, such bugs can't crash Tor,
17091 though we should still fix them as they occur. Closes ticket
17092 20384 (TROVE-2016-10-001).
17094 o Major bugfixes (parsing, security, backport from 0.2.9.8):
17095 - Fix a bug in parsing that could cause clients to read a single
17096 byte past the end of an allocated region. This bug could be used
17097 to cause hardened clients (built with --enable-expensive-hardening)
17098 to crash if they tried to visit a hostile hidden service. Non-
17099 hardened clients are only affected depending on the details of
17100 their platform's memory allocator. Fixes bug 21018; bugfix on
17101 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17102 2016-12-002 and as CVE-2016-1254.
17104 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
17105 - Fix an error that could cause us to read 4 bytes before the
17106 beginning of an openssl string. This bug could be used to cause
17107 Tor to crash on systems with unusual malloc implementations, or
17108 systems with unusual hardening installed. Fixes bug 17404; bugfix
17111 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
17112 - Avoid a difficult-to-trigger heap corruption attack when extending
17113 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
17114 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
17115 Reported by Guido Vranken.
17117 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
17118 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
17119 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
17121 o Major bugfixes (guard selection, backport from 0.2.7.6):
17122 - Actually look at the Guard flag when selecting a new directory
17123 guard. When we implemented the directory guard design, we
17124 accidentally started treating all relays as if they have the Guard
17125 flag during guard selection, leading to weaker anonymity and worse
17126 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
17129 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
17130 - If OpenSSL fails to generate an RSA key, do not retain a dangling
17131 pointer to the previous (uninitialized) key value. The impact here
17132 should be limited to a difficult-to-trigger crash, if OpenSSL is
17133 running an engine that makes key generation failures possible, or
17134 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
17135 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
17138 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
17139 - Fix an integer underflow bug when comparing malformed Tor
17140 versions. This bug could crash Tor when built with
17141 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
17142 0.2.9.8, which were built with -ftrapv by default. In other cases
17143 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
17144 on 0.0.8pre1. Found by OSS-Fuzz.
17146 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
17147 - Make memwipe() do nothing when passed a NULL pointer or buffer of
17148 zero size. Check size argument to memwipe() for underflow. Fixes
17149 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
17152 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
17153 - Make Tor survive errors involving connections without a
17154 corresponding event object. Previously we'd fail with an
17155 assertion; now we produce a log message. Related to bug 16248.
17157 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
17158 - Make it harder for attackers to overload hidden services with
17159 introductions, by blocking multiple introduction requests on the
17160 same circuit. Resolves ticket 15515.
17162 o Minor features (geoip):
17163 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
17166 o Minor bugfixes (compilation, backport from 0.2.7.6):
17167 - Fix a compilation warning with Clang 3.6: Do not check the
17168 presence of an address which can never be NULL. Fixes bug 17781.
17170 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
17171 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
17172 a client authorized hidden service. Fixes bug 15823; bugfix
17176 Changes in version 0.3.0.4-rc - 2017-03-01
17177 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
17178 0.3.0 release series, and introduces a few reliability features to
17179 keep them from coming back.
17181 This is the first release candidate in the Tor 0.3.0 series. If we
17182 find no new bugs or regressions here, the first stable 0.3.0 release
17183 will be nearly identical to it.
17185 o Major bugfixes (bridges):
17186 - When the same bridge is configured multiple times with the same
17187 identity, but at different address:port combinations, treat those
17188 bridge instances as separate guards. This fix restores the ability
17189 of clients to configure the same bridge with multiple pluggable
17190 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
17192 o Major bugfixes (hidden service directory v3):
17193 - Stop crashing on a failed v3 hidden service descriptor lookup
17194 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
17196 o Major bugfixes (parsing):
17197 - When parsing a malformed content-length field from an HTTP
17198 message, do not read off the end of the buffer. This bug was a
17199 potential remote denial-of-service attack against Tor clients and
17200 relays. A workaround was released in October 2016, to prevent this
17201 bug from crashing Tor. This is a fix for the underlying issue,
17202 which should no longer matter (if you applied the earlier patch).
17203 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
17204 using AFL (http://lcamtuf.coredump.cx/afl/).
17205 - Fix an integer underflow bug when comparing malformed Tor
17206 versions. This bug could crash Tor when built with
17207 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
17208 0.2.9.8, which were built with -ftrapv by default. In other cases
17209 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
17210 on 0.0.8pre1. Found by OSS-Fuzz.
17212 o Minor feature (protocol versioning):
17213 - Add new protocol version for proposal 224. HSIntro now advertises
17214 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
17216 o Minor features (directory authorities):
17217 - Directory authorities now reject descriptors that claim to be
17218 malformed versions of Tor. Helps prevent exploitation of
17220 - Reject version numbers with components that exceed INT32_MAX.
17221 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
17222 Fixes bug 21450; bugfix on 0.0.8pre1.
17223 - Directory authorities now reject relays running versions
17224 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
17225 suffer from bug 20499 and don't keep their consensus cache
17226 up-to-date. Resolves ticket 20509.
17228 o Minor features (geoip):
17229 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
17232 o Minor features (reliability, crash):
17233 - Try better to detect problems in buffers where they might grow (or
17234 think they have grown) over 2 GB in size. Diagnostic for
17237 o Minor features (testing):
17238 - During 'make test-network-all', if tor logs any warnings, ask
17239 chutney to output them. Requires a recent version of chutney with
17240 the 21572 patch. Implements 21570.
17242 o Minor bugfixes (certificate expiration time):
17243 - Avoid using link certificates that don't become valid till some
17244 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
17246 o Minor bugfixes (code correctness):
17247 - Repair a couple of (unreachable or harmless) cases of the risky
17248 comparison-by-subtraction pattern that caused bug 21278.
17249 - Remove a redundant check for the UseEntryGuards option from the
17250 options_transition_affects_guards() function. Fixes bug 21492;
17251 bugfix on 0.3.0.1-alpha.
17253 o Minor bugfixes (directory mirrors):
17254 - Allow relays to use directory mirrors without a DirPort: these
17255 relays need to be contacted over their ORPorts using a begindir
17256 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
17257 - Clarify the message logged when a remote relay is unexpectedly
17258 missing an ORPort or DirPort: users were confusing this with a
17259 local port. Fixes another case of bug 20711; bugfix
17262 o Minor bugfixes (guards):
17263 - Don't warn about a missing guard state on timeout-measurement
17264 circuits: they aren't supposed to be using guards. Fixes an
17265 instance of bug 21007; bugfix on 0.3.0.1-alpha.
17266 - Silence a BUG() warning when attempting to use a guard whose
17267 descriptor we don't know, and make this scenario less likely to
17268 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
17270 o Minor bugfixes (hidden service):
17271 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
17272 cells. Previously, we were using sizeof() on a pointer, instead of
17273 the real destination buffer. Fortunately, that value was only used
17274 to double-check that there was enough room--which was already
17275 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
17277 o Minor bugfixes (testing):
17278 - Fix Raspbian build issues related to missing socket errno in
17279 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
17281 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
17282 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
17283 - Use bash in src/test/test-network.sh. This ensures we reliably
17284 call chutney's newer tools/test-network.sh when available. Fixes
17285 bug 21562; bugfix on 0.2.9.1-alpha.
17288 - Small fixes to the fuzzing documentation. Closes ticket 21472.
17291 Changes in version 0.2.9.10 - 2017-03-01
17292 Tor 0.2.9.10 backports a security fix from later Tor release. It also
17293 includes fixes for some major issues affecting directory authorities,
17294 LibreSSL compatibility, and IPv6 correctness.
17296 The Tor 0.2.9.x release series is now marked as a long-term-support
17297 series. We intend to backport security fixes to 0.2.9.x until at
17298 least January of 2020.
17300 o Major bugfixes (directory authority, 0.3.0.3-alpha):
17301 - During voting, when marking a relay as a probable sybil, do not
17302 clear its BadExit flag: sybils can still be bad in other ways
17303 too. (We still clear the other flags.) Fixes bug 21108; bugfix
17306 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
17307 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
17308 any IPv6 addresses. Instead, only reject a port over IPv6 if the
17309 exit policy rejects that port on more than an IPv6 /16 of
17310 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
17311 which rejected a relay's own IPv6 address by default. Fixes bug
17312 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
17314 o Major bugfixes (parsing, also in 0.3.0.4-rc):
17315 - Fix an integer underflow bug when comparing malformed Tor
17316 versions. This bug could crash Tor when built with
17317 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
17318 0.2.9.8, which were built with -ftrapv by default. In other cases
17319 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
17320 on 0.0.8pre1. Found by OSS-Fuzz.
17322 o Minor features (directory authorities, also in 0.3.0.4-rc):
17323 - Directory authorities now reject descriptors that claim to be
17324 malformed versions of Tor. Helps prevent exploitation of
17326 - Reject version numbers with components that exceed INT32_MAX.
17327 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
17328 Fixes bug 21450; bugfix on 0.0.8pre1.
17330 o Minor features (geoip):
17331 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
17334 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
17335 - Autoconf now checks to determine if OpenSSL structures are opaque,
17336 instead of explicitly checking for OpenSSL version numbers. Part
17338 - Support building with recent LibreSSL code that uses opaque
17339 structures. Closes ticket 21359.
17341 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
17342 - Repair a couple of (unreachable or harmless) cases of the risky
17343 comparison-by-subtraction pattern that caused bug 21278.
17345 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
17346 - The tor-resolve command line tool now rejects hostnames over 255
17347 characters in length. Previously, it would silently truncate them,
17348 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
17349 Patch by "junglefowl".
17352 Changes in version 0.3.0.3-alpha - 2017-02-03
17353 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
17354 0.3.0.x development series, including some that could cause
17355 authorities to behave badly. There is also a fix for a longstanding
17356 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
17357 includes some smaller features and bugfixes.
17359 The Tor 0.3.0.x release series is now in patch-freeze: no additional
17360 features will be considered for inclusion in 0.3.0.x. We suspect that
17361 some bugs will probably remain, however, and we encourage people to
17364 o Major bugfixes (directory authority):
17365 - During voting, when marking a relay as a probable sybil, do not
17366 clear its BadExit flag: sybils can still be bad in other ways
17367 too. (We still clear the other flags.) Fixes bug 21108; bugfix
17369 - When deciding whether we have just found a router to be reachable,
17370 do not penalize it for not having performed an Ed25519 link
17371 handshake if it does not claim to support an Ed25519 handshake.
17372 Previously, we would treat such relays as non-running. Fixes bug
17373 21107; bugfix on 0.3.0.1-alpha.
17375 o Major bugfixes (entry guards):
17376 - Stop trying to build circuits through entry guards for which we
17377 have no descriptor. Also, stop crashing in the case that we *do*
17378 accidentally try to build a circuit in such a state. Fixes bug
17379 21242; bugfix on 0.3.0.1-alpha.
17381 o Major bugfixes (IPv6 Exits):
17382 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
17383 any IPv6 addresses. Instead, only reject a port over IPv6 if the
17384 exit policy rejects that port on more than an IPv6 /16 of
17385 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
17386 which rejected a relay's own IPv6 address by default. Fixes bug
17387 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
17389 o Minor feature (client):
17390 - Enable IPv6 traffic on the SocksPort by default. To disable this,
17391 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
17393 o Minor feature (fallback scripts):
17394 - Add a check_existing mode to updateFallbackDirs.py, which checks
17395 if fallbacks in the hard-coded list are working. Closes ticket
17396 20174. Patch by haxxpop.
17398 o Minor features (ciphersuite selection):
17399 - Clients now advertise a list of ciphersuites closer to the ones
17400 preferred by Firefox. Closes part of ticket 15426.
17401 - Allow relays to accept a wider range of ciphersuites, including
17402 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
17404 o Minor features (controller, configuration):
17405 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
17406 and so on, now comes with a __*Port variant that will not be saved
17407 to the torrc file by the controller's SAVECONF command. This
17408 change allows TorBrowser to set up a single-use domain socket for
17409 each time it launches Tor. Closes ticket 20956.
17410 - The GETCONF command can now query options that may only be
17411 meaningful in context-sensitive lists. This allows the controller
17412 to query the mixed SocksPort/__SocksPort style options introduced
17413 in feature 20956. Implements ticket 21300.
17415 o Minor features (portability, compilation):
17416 - Autoconf now checks to determine if OpenSSL structures are opaque,
17417 instead of explicitly checking for OpenSSL version numbers. Part
17419 - Support building with recent LibreSSL code that uses opaque
17420 structures. Closes ticket 21359.
17422 o Minor features (relay):
17423 - We now allow separation of exit and relay traffic to different
17424 source IP addresses, using the OutboundBindAddressExit and
17425 OutboundBindAddressOR options respectively. Closes ticket 17975.
17426 Written by Michael Sonntag.
17428 o Minor bugfix (logging):
17429 - Don't recommend the use of Tor2web in non-anonymous mode.
17430 Recommending Tor2web is a bad idea because the client loses all
17431 anonymity. Tor2web should only be used in specific cases by users
17432 who *know* and understand the issues. Fixes bug 21294; bugfix
17435 o Minor bugfixes (client):
17436 - Always recover from failures in extend_info_from_node(), in an
17437 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
17438 bugfix on 0.2.3.1-alpha.
17440 o Minor bugfixes (client, entry guards):
17441 - Fix a bug warning (with backtrace) when we fail a channel that
17442 circuits to fallback directories on it. Fixes bug 21128; bugfix
17444 - Fix a spurious bug warning (with backtrace) when removing an
17445 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
17446 - Fix a bug of the new guard algorithm where tor could stall for up
17447 to 10 minutes before retrying a guard after a long period of no
17448 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
17449 - Do not try to build circuits until we have descriptors for our
17450 primary entry guards. Related to fix for bug 21242.
17452 o Minor bugfixes (configure, autoconf):
17453 - Rename the configure option --enable-expensive-hardening to
17454 --enable-fragile-hardening. Expensive hardening makes the tor
17455 daemon abort when some kinds of issues are detected. Thus, it
17456 makes tor more at risk of remote crashes but safer against RCE or
17457 heartbleed bug category. We now try to explain this issue in a
17458 message from the configure script. Fixes bug 21290; bugfix
17461 o Minor bugfixes (controller):
17462 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
17463 20824; bugfix on 0.3.0.1-alpha.
17465 o Minor bugfixes (hidden service):
17466 - Clean up the code for expiring intro points with no associated
17467 circuits. It was causing, rarely, a service with some expiring
17468 introduction points to not open enough additional introduction
17469 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
17470 - Stop setting the torrc option HiddenServiceStatistics to "0" just
17471 because we're not a bridge or relay. Instead, we preserve whatever
17472 value the user set (or didn't set). Fixes bug 21150; bugfix
17474 - Resolve two possible underflows which could lead to creating and
17475 closing a lot of introduction point circuits in a non-stop loop.
17476 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
17478 o Minor bugfixes (portability):
17479 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
17480 It is supported by OpenBSD itself, and also by most OpenBSD
17481 variants (such as Bitrig). Fixes bug 20980; bugfix
17483 - When mapping a file of length greater than SIZE_MAX, do not
17484 silently truncate its contents. This issue could occur on 32 bit
17485 systems with large file support and files which are larger than 4
17486 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
17488 o Minor bugfixes (tor-resolve):
17489 - The tor-resolve command line tool now rejects hostnames over 255
17490 characters in length. Previously, it would silently truncate them,
17491 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
17492 Patch by "junglefowl".
17494 o Minor bugfixes (Windows services):
17495 - Be sure to initialize the monotonic time subsystem before using
17496 it, even when running as an NT service. Fixes bug 21356; bugfix
17500 Changes in version 0.3.0.2-alpha - 2017-01-23
17501 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
17502 cause relays and clients to crash, even if they were not built with
17503 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17504 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17505 version should upgrade.
17507 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
17508 time-to-live values, makes directory authorities enforce the 1-to-1
17509 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
17510 client-side onion service reachability bug, does better at selecting
17511 the set of fallback directories, and more.
17513 o Major bugfixes (security, also in 0.2.9.9):
17514 - Downgrade the "-ftrapv" option from "always on" to "only on when
17515 --enable-expensive-hardening is provided." This hardening option, like
17516 others, can turn survivable bugs into crashes--and having it on by
17517 default made a (relatively harmless) integer overflow bug into a
17518 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
17521 o Major features (security):
17522 - Change the algorithm used to decide DNS TTLs on client and server
17523 side, to better resist DNS-based correlation attacks like the
17524 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
17525 Feamster. Now relays only return one of two possible DNS TTL
17526 values, and clients are willing to believe DNS TTL values up to 3
17527 hours long. Closes ticket 19769.
17529 o Major features (directory authority, security):
17530 - The default for AuthDirPinKeys is now 1: directory authorities
17531 will reject relays where the RSA identity key matches a previously
17532 seen value, but the Ed25519 key has changed. Closes ticket 18319.
17534 o Major bugfixes (client, guard, crash):
17535 - In circuit_get_global_origin_list(), return the actual list of
17536 origin circuits. The previous version of this code returned the
17537 list of all the circuits, and could have caused strange bugs,
17538 including possible crashes. Fixes bug 21118; bugfix
17541 o Major bugfixes (client, onion service, also in 0.2.9.9):
17542 - Fix a client-side onion service reachability bug, where multiple
17543 socks requests to an onion service (or a single slow request)
17544 could cause us to mistakenly mark some of the service's
17545 introduction points as failed, and we cache that failure so
17546 eventually we run out and can't reach the service. Also resolves a
17547 mysterious "Remote server sent bogus reason code 65021" log
17548 warning. The bug was introduced in ticket 17218, where we tried to
17549 remember the circuit end reason as a uint16_t, which mangled
17550 negative values. Partially fixes bug 21056 and fixes bug 20307;
17551 bugfix on 0.2.8.1-alpha.
17553 o Major bugfixes (DNS):
17554 - Fix a bug that prevented exit nodes from caching DNS records for
17555 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
17557 o Minor features (controller):
17558 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
17559 shared-random values to the controller. Closes ticket 19925.
17561 o Minor features (entry guards):
17562 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
17563 break regression tests.
17564 - Require UseEntryGuards when UseBridges is set, in order to make
17565 sure bridges aren't bypassed. Resolves ticket 20502.
17567 o Minor features (fallback directories):
17568 - Select 200 fallback directories for each release. Closes
17570 - Allow 3 fallback relays per operator, which is safe now that we
17571 are choosing 200 fallback relays. Closes ticket 20912.
17572 - Exclude relays affected by bug 20499 from the fallback list.
17573 Exclude relays from the fallback list if they are running versions
17574 known to be affected by bug 20499, or if in our tests they deliver
17575 a stale consensus (i.e. one that expired more than 24 hours ago).
17576 Closes ticket 20539.
17577 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
17579 - Require fallback directories to have the same address and port for
17580 7 days (now that we have enough relays with this stability).
17581 Relays whose OnionOO stability timer is reset on restart by bug
17582 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
17583 this issue. Closes ticket 20880; maintains short-term fix
17585 - Require fallbacks to have flags for 90% of the time (weighted
17586 decaying average), rather than 95%. This allows at least 73% of
17587 clients to bootstrap in the first 5 seconds without contacting an
17588 authority. Part of ticket 18828.
17589 - Annotate updateFallbackDirs.py with the bandwidth and consensus
17590 weight for each candidate fallback. Closes ticket 20878.
17591 - Make it easier to change the output sort order of fallbacks.
17592 Closes ticket 20822.
17593 - Display the relay fingerprint when downloading consensuses from
17594 fallbacks. Closes ticket 20908.
17596 o Minor features (geoip, also in 0.2.9.9):
17597 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17600 o Minor features (next-gen onion service directories):
17601 - Remove the "EnableOnionServicesV3" consensus parameter that we
17602 introduced in 0.3.0.1-alpha: relays are now always willing to act
17603 as v3 onion service directories. Resolves ticket 19899.
17605 o Minor features (linting):
17606 - Enhance the changes file linter to warn on Tor versions that are
17607 prefixed with "tor-". Closes ticket 21096.
17609 o Minor features (logging):
17610 - In several places, describe unset ed25519 keys as "<unset>",
17611 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
17613 o Minor bugfix (control protocol):
17614 - The reply to a "GETINFO config/names" request via the control
17615 protocol now spells the type "Dependent" correctly. This is a
17616 breaking change in the control protocol. (The field seems to be
17617 ignored by the most common known controllers.) Fixes bug 18146;
17618 bugfix on 0.1.1.4-alpha.
17620 o Minor bugfixes (bug resilience):
17621 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
17622 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
17623 Hans Jerry Illikainen.
17625 o Minor bugfixes (build):
17626 - Replace obsolete Autoconf macros with their modern equivalent and
17627 prevent similar issues in the future. Fixes bug 20990; bugfix
17630 o Minor bugfixes (client, guards):
17631 - Fix bug where Tor would think that there are circuits waiting for
17632 better guards even though those circuits have been freed. Fixes
17633 bug 21142; bugfix on 0.3.0.1-alpha.
17635 o Minor bugfixes (config):
17636 - Don't assert on startup when trying to get the options list and
17637 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
17638 options so of course they aren't ready yet. Fixes bug 21062;
17639 bugfix on 0.2.9.3-alpha.
17641 o Minor bugfixes (controller):
17642 - Make the GETINFO interface for inquiring about entry guards
17643 support the new guards backend. Fixes bug 20823; bugfix
17646 o Minor bugfixes (dead code):
17647 - Remove a redundant check for PidFile changes at runtime in
17648 options_transition_allowed(): this check is already performed
17649 regardless of whether the sandbox is active. Fixes bug 21123;
17650 bugfix on 0.2.5.4-alpha.
17652 o Minor bugfixes (documentation):
17653 - Update the tor manual page to document every option that can not
17654 be changed while tor is running. Fixes bug 21122.
17656 o Minor bugfixes (fallback directories):
17657 - Stop failing when a relay has no uptime data in
17658 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
17659 - Avoid checking fallback candidates' DirPorts if they are down in
17660 OnionOO. When a relay operator has multiple relays, this
17661 prioritizes relays that are up over relays that are down. Fixes
17662 bug 20926; bugfix on 0.2.8.3-alpha.
17663 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
17664 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
17666 o Minor bugfixes (guards, bootstrapping):
17667 - When connecting to a directory guard during bootstrap, do not mark
17668 the guard as successful until we receive a good-looking directory
17669 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
17671 o Minor bugfixes (onion services):
17672 - Fix the config reload pruning of old vs new services so it
17673 actually works when both ephemeral and non-ephemeral services are
17674 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
17675 - Allow the number of introduction points to be as low as 0, rather
17676 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
17678 o Minor bugfixes (IPv6):
17679 - Make IPv6-using clients try harder to find an IPv6 directory
17680 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
17681 - When IPv6 addresses have not been downloaded yet (microdesc
17682 consensus documents don't list relay IPv6 addresses), use hard-
17683 coded addresses for authorities, fallbacks, and configured
17684 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
17685 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
17687 o Minor bugfixes (memory leaks):
17688 - Fix a memory leak when configuring hidden services. Fixes bug
17689 20987; bugfix on 0.3.0.1-alpha.
17691 o Minor bugfixes (portability, also in 0.2.9.9):
17692 - Avoid crashing when Tor is built using headers that contain
17693 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17694 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17696 - Fix Libevent detection on platforms without Libevent 1 headers
17697 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17699 o Minor bugfixes (relay):
17700 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
17701 initializing the keys would reset the DataDirectory to 0700
17702 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
17703 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
17705 o Minor bugfixes (testing):
17706 - Remove undefined behavior from the backtrace generator by removing
17707 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
17709 o Minor bugfixes (unit tests):
17710 - Allow the unit tests to pass even when DNS lookups of bogus
17711 addresses do not fail as expected. Fixes bug 20862 and 20863;
17712 bugfix on unit tests introduced in 0.2.8.1-alpha
17713 through 0.2.9.4-alpha.
17715 o Code simplification and refactoring:
17716 - Refactor code to manipulate global_origin_circuit_list into
17717 separate functions. Closes ticket 20921.
17719 o Documentation (formatting):
17720 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
17721 blocks were incorrectly appearing. Closes ticket 20885.
17723 o Documentation (man page):
17724 - Clarify many options in tor.1 and add some min/max values for
17725 HiddenService options. Closes ticket 21058.
17728 Changes in version 0.2.9.9 - 2017-01-23
17729 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
17730 cause relays and clients to crash, even if they were not built with
17731 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17732 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17733 version should upgrade.
17735 This release also resolves a client-side onion service reachability
17736 bug, and resolves a pair of small portability issues.
17738 o Major bugfixes (security):
17739 - Downgrade the "-ftrapv" option from "always on" to "only on when
17740 --enable-expensive-hardening is provided." This hardening option,
17741 like others, can turn survivable bugs into crashes -- and having
17742 it on by default made a (relatively harmless) integer overflow bug
17743 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
17744 bugfix on 0.2.9.1-alpha.
17746 o Major bugfixes (client, onion service):
17747 - Fix a client-side onion service reachability bug, where multiple
17748 socks requests to an onion service (or a single slow request)
17749 could cause us to mistakenly mark some of the service's
17750 introduction points as failed, and we cache that failure so
17751 eventually we run out and can't reach the service. Also resolves a
17752 mysterious "Remote server sent bogus reason code 65021" log
17753 warning. The bug was introduced in ticket 17218, where we tried to
17754 remember the circuit end reason as a uint16_t, which mangled
17755 negative values. Partially fixes bug 21056 and fixes bug 20307;
17756 bugfix on 0.2.8.1-alpha.
17758 o Minor features (geoip):
17759 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17762 o Minor bugfixes (portability):
17763 - Avoid crashing when Tor is built using headers that contain
17764 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17765 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17767 - Fix Libevent detection on platforms without Libevent 1 headers
17768 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17771 Changes in version 0.3.0.1-alpha - 2016-12-19
17772 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
17773 series. It strengthens Tor's link and circuit handshakes by
17774 identifying relays by their Ed25519 keys, improves the algorithm that
17775 clients use to choose and maintain their list of guards, and includes
17776 additional backend support for the next-generation hidden service
17777 design. It also contains numerous other small features and
17778 improvements to security, correctness, and performance.
17780 Below are the changes since 0.2.9.8.
17782 o Major features (guard selection algorithm):
17783 - Tor's guard selection algorithm has been redesigned from the
17784 ground up, to better support unreliable networks and restrictive
17785 sets of entry nodes, and to better resist guard-capture attacks by
17786 hostile local networks. Implements proposal 271; closes
17789 o Major features (next-generation hidden services):
17790 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
17791 prop224 aka "Next Generation Hidden Services". Service and clients
17792 don't use this functionality yet. Closes ticket 19043. Based on
17793 initial code by Alec Heifetz.
17794 - Relays now support the HSDir version 3 protocol, so that they can
17795 can store and serve v3 descriptors. This is part of the next-
17796 generation onion service work detailed in proposal 224. Closes
17799 o Major features (protocol, ed25519 identity keys):
17800 - Relays now use Ed25519 to prove their Ed25519 identities and to
17801 one another, and to clients. This algorithm is faster and more
17802 secure than the RSA-based handshake we've been doing until now.
17803 Implements the second big part of proposal 220; Closes
17805 - Clients now support including Ed25519 identity keys in the EXTEND2
17806 cells they generate. By default, this is controlled by a consensus
17807 parameter, currently disabled. You can turn this feature on for
17808 testing by setting ExtendByEd25519ID in your configuration. This
17809 might make your traffic appear different than the traffic
17810 generated by other users, however. Implements part of ticket
17811 15056; part of proposal 220.
17812 - Relays now understand requests to extend to other relays by their
17813 Ed25519 identity keys. When an Ed25519 identity key is included in
17814 an EXTEND2 cell, the relay will only extend the circuit if the
17815 other relay can prove ownership of that identity. Implements part
17816 of ticket 15056; part of proposal 220.
17818 o Major bugfixes (scheduler):
17819 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
17820 caused the channel scheduler to behave more or less randomly,
17821 rather than preferring channels with higher-priority circuits.
17822 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
17824 o Minor features (controller):
17825 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
17826 rather than "unrecognized." Closes ticket 20389; patch from
17829 o Minor features (diagnostic, directory client):
17830 - Warn when we find an unexpected inconsistency in directory
17831 download status objects. Prevents some negative consequences of
17834 o Minor features (directory authority):
17835 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
17836 default) to control whether authorities should try to probe relays
17837 by their Ed25519 link keys. This option will go away in a few
17838 releases--unless we encounter major trouble in our ed25519 link
17839 protocol rollout, in which case it will serve as a safety option.
17841 o Minor features (directory cache):
17842 - Relays and bridges will now refuse to serve the consensus they
17843 have if they know it is too old for a client to use. Closes
17846 o Minor features (ed25519 link handshake):
17847 - Advertise support for the ed25519 link handshake using the
17848 subprotocol-versions mechanism, so that clients can tell which
17849 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
17851 o Minor features (fingerprinting resistance, authentication):
17852 - Extend the length of RSA keys used for TLS link authentication to
17853 2048 bits. (These weren't used for forward secrecy; for forward
17854 secrecy, we used P256.) Closes ticket 13752.
17856 o Minor features (infrastructure):
17857 - Implement smartlist_add_strdup() function. Replaces the use of
17858 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
17860 o Minor bugfixes (client):
17861 - When clients that use bridges start up with a cached consensus on
17862 disk, they were ignoring it and downloading a new one. Now they
17863 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
17865 o Minor bugfixes (configuration):
17866 - Accept non-space whitespace characters after the severity level in
17867 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
17868 - Support "TByte" and "TBytes" units in options given in bytes.
17869 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
17870 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
17872 o Minor bugfixes (consensus weight):
17873 - Add new consensus method that initializes bw weights to 1 instead
17874 of 0. This prevents a zero weight from making it all the way to
17875 the end (happens in small testing networks) and causing an error.
17876 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
17878 o Minor bugfixes (descriptors):
17879 - Correctly recognise downloaded full descriptors as valid, even
17880 when using microdescriptors as circuits. This affects clients with
17881 FetchUselessDescriptors set, and may affect directory authorities.
17882 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
17884 o Minor bugfixes (directory system):
17885 - Download all consensus flavors, descriptors, and authority
17886 certificates when FetchUselessDescriptors is set, regardless of
17887 whether tor is a directory cache or not. Fixes bug 20667; bugfix
17888 on all recent tor versions.
17889 - Bridges and relays now use microdescriptors (like clients do)
17890 rather than old-style router descriptors. Now bridges will blend
17891 in with clients in terms of the circuits they build. Fixes bug
17892 6769; bugfix on 0.2.3.2-alpha.
17894 o Minor bugfixes (ed25519 certificates):
17895 - Correctly interpret ed25519 certificates that would expire some
17896 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
17898 o Minor bugfixes (hidden services):
17899 - Stop ignoring misconfigured hidden services. Instead, refuse to
17900 start tor until the misconfigurations have been corrected. Fixes
17901 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
17904 o Minor bugfixes (memory leak at exit):
17905 - Fix a small harmless memory leak at exit of the previously unused
17906 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
17909 o Minor bugfixes (util):
17910 - When finishing writing a file to disk, if we were about to replace
17911 the file with the temporary file created before and we fail to
17912 replace it, remove the temporary file so it doesn't stay on disk.
17913 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
17915 o Minor bugfixes (Windows):
17916 - Check for getpagesize before using it to mmap files. This fixes
17917 compilation in some MinGW environments. Fixes bug 20530; bugfix on
17918 0.1.2.1-alpha. Reported by "ice".
17920 o Code simplification and refactoring:
17921 - Abolish all global guard context in entrynodes.c; replace with new
17922 guard_selection_t structure as preparation for proposal 271.
17923 Closes ticket 19858.
17924 - Introduce rend_service_is_ephemeral() that tells if given onion
17925 service is ephemeral. Replace unclear NULL-checkings for service
17926 directory with this function. Closes ticket 20526.
17927 - Extract magic numbers in circuituse.c into defined variables.
17928 - Refactor circuit_is_available_for_use to remove unnecessary check.
17929 - Refactor circuit_predict_and_launch_new for readability and
17930 testability. Closes ticket 18873.
17931 - Refactor large if statement in purpose_needs_anonymity to use
17932 switch statement instead. Closes part of ticket 20077.
17933 - Refactor the hashing API to return negative values for errors, as
17934 is done as throughout the codebase. Closes ticket 20717.
17935 - Remove data structures that were used to index or_connection
17936 objects by their RSA identity digests. These structures are fully
17937 redundant with the similar structures used in the
17938 channel abstraction.
17939 - Remove duplicate code in the channel_write_*cell() functions.
17940 Closes ticket 13827; patch from Pingl.
17941 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
17942 use only purpose_needs_anonymity. Closes part of ticket 20077.
17943 - The code to generate and parse EXTEND and EXTEND2 cells has been
17944 replaced with code automatically generated by the
17948 - Include the "TBits" unit in Tor's man page. Fixes part of bug
17949 20622; bugfix on 0.2.5.1-alpha.
17950 - Change '1' to 'weight_scale' in consensus bw weights calculation
17951 comments, as that is reality. Closes ticket 20273. Patch
17953 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
17954 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
17956 - Stop the man page from incorrectly stating that HiddenServiceDir
17957 must already exist. Fixes 20486.
17958 - Clarify that when ClientRejectInternalAddresses is enabled (which
17959 is the default), multicast DNS hostnames for machines on the local
17960 network (of the form *.local) are also rejected. Closes
17963 o Removed features:
17964 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
17965 limit for relays running on a single IP applies to authority IP
17966 addresses as well as to non-authority IP addresses. Closes
17968 - The UseDirectoryGuards torrc option no longer exists: all users
17969 that use entry guards will also use directory guards. Related to
17970 proposal 271; implements part of ticket 20831.
17973 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
17974 from "overcaffeinated".
17975 - Perform the coding style checks when running the tests and fail
17976 when coding style violations are found. Closes ticket 5500.
17977 - Add tests for networkstatus_compute_bw_weights_v10.
17978 - Add unit tests circuit_predict_and_launch_new.
17979 - Extract dummy_origin_circuit_new so it can be used by other
17983 Changes in version 0.2.8.12 - 2016-12-19
17984 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
17985 below) where Tor clients could crash when attempting to visit a
17986 hostile hidden service. Clients are recommended to upgrade as packages
17987 become available for their systems.
17989 It also includes an updated list of fallback directories, backported
17992 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
17993 backported to 0.2.8 in the future.
17995 o Major bugfixes (parsing, security, backported from 0.2.9.8):
17996 - Fix a bug in parsing that could cause clients to read a single
17997 byte past the end of an allocated region. This bug could be used
17998 to cause hardened clients (built with --enable-expensive-hardening)
17999 to crash if they tried to visit a hostile hidden service. Non-
18000 hardened clients are only affected depending on the details of
18001 their platform's memory allocator. Fixes bug 21018; bugfix on
18002 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
18003 2016-12-002 and as CVE-2016-1254.
18005 o Minor features (fallback directory list, backported from 0.2.9.8):
18006 - Replace the 81 remaining fallbacks of the 100 originally
18007 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
18008 fallbacks (123 new, 54 existing, 27 removed) generated in December
18009 2016. Resolves ticket 20170.
18011 o Minor features (geoip, backported from 0.2.9.7-rc):
18012 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
18016 Changes in version 0.2.9.8 - 2016-12-19
18017 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
18019 The Tor 0.2.9 series makes mandatory a number of security features
18020 that were formerly optional. It includes support for a new shared-
18021 randomness protocol that will form the basis for next generation
18022 hidden services, includes a single-hop hidden service mode for
18023 optimizing .onion services that don't actually want to be hidden,
18024 tries harder not to overload the directory authorities with excessive
18025 downloads, and supports a better protocol versioning scheme for
18026 improved compatibility with other implementations of the Tor protocol.
18028 And of course, there are numerous other bugfixes and improvements.
18030 This release also includes a fix for a medium-severity issue (bug
18031 21018 below) where Tor clients could crash when attempting to visit a
18032 hostile hidden service. Clients are recommended to upgrade as packages
18033 become available for their systems.
18035 Below are the changes since 0.2.9.7-rc. For a list of all changes
18036 since 0.2.8, see the ReleaseNotes file.
18038 o Major bugfixes (parsing, security):
18039 - Fix a bug in parsing that could cause clients to read a single
18040 byte past the end of an allocated region. This bug could be used
18041 to cause hardened clients (built with --enable-expensive-hardening)
18042 to crash if they tried to visit a hostile hidden service. Non-
18043 hardened clients are only affected depending on the details of
18044 their platform's memory allocator. Fixes bug 21018; bugfix on
18045 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
18046 2016-12-002 and as CVE-2016-1254.
18048 o Minor features (fallback directory list):
18049 - Replace the 81 remaining fallbacks of the 100 originally
18050 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
18051 fallbacks (123 new, 54 existing, 27 removed) generated in December
18052 2016. Resolves ticket 20170.
18055 Changes in version 0.2.9.7-rc - 2016-12-12
18056 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
18057 including a few that had prevented tests from passing on
18060 o Minor features (geoip):
18061 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
18064 o Minor bugfix (build):
18065 - The current Git revision when building from a local repository is
18066 now detected correctly when using git worktrees. Fixes bug 20492;
18067 bugfix on 0.2.3.9-alpha.
18069 o Minor bugfixes (directory authority):
18070 - When computing old Tor protocol line version in protover, we were
18071 looking at 0.2.7.5 twice instead of a specific case for
18072 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
18074 o Minor bugfixes (download scheduling):
18075 - Resolve a "bug" warning when considering a download schedule whose
18076 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
18078 o Minor bugfixes (logging):
18079 - Downgrade a harmless log message about the
18080 pending_entry_connections list from "warn" to "info". Mitigates
18083 o Minor bugfixes (memory leak):
18084 - Fix a small memory leak when receiving AF_UNIX connections on a
18085 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
18086 - When moving a signed descriptor object from a source to an
18087 existing destination, free the allocated memory inside that
18088 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
18090 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
18091 - Fix a memory leak and use-after-free error when removing entries
18092 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
18093 0.2.5.5-alpha. Patch from "cypherpunks".
18095 o Minor bugfixes (portability):
18096 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
18097 Fixes bug 20935; bugfix on 0.2.9.6-rc.
18099 o Minor bugfixes (unit tests):
18100 - Stop expecting NetBSD unit tests to report success for ipfw. Part
18101 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
18102 - Fix tolerances in unit tests for monotonic time comparisons
18103 between nanoseconds and microseconds. Previously, we accepted a 10
18104 us difference only, which is not realistic on every platform's
18105 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
18106 - Remove a double-free in the single onion service unit test. Stop
18107 ignoring a return value. Make future changes less error-prone.
18108 Fixes bug 20864; bugfix on 0.2.9.6-rc.
18111 Changes in version 0.2.8.11 - 2016-12-08
18112 Tor 0.2.8.11 backports fixes for additional portability issues that
18113 could prevent Tor from building correctly on OSX Sierra, or with
18114 OpenSSL 1.1. Affected users should upgrade; others can safely stay
18117 o Minor bugfixes (portability):
18118 - Avoid compilation errors when building on OSX Sierra. Sierra began
18119 to support the getentropy() and clock_gettime() APIs, but created
18120 a few problems in doing so. Tor 0.2.9 has a more thorough set of
18121 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
18122 monotonic time interfaces. Fixes bug 20865. Bugfix
18125 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
18126 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
18127 architectures. Closes ticket 20588.
18130 Changes in version 0.2.8.10 - 2016-12-02
18131 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
18132 unusable after they left standby mode. It also backports fixes for
18133 a few portability issues and a small but problematic memory leak.
18135 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
18136 - When Tor leaves standby because of a new application request, open
18137 circuits as needed to serve that request. Previously, we would
18138 potentially wait a very long time. Fixes part of bug 19969; bugfix
18141 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
18142 - Clients now respond to new application stream requests immediately
18143 when they arrive, rather than waiting up to one second before
18144 starting to handle them. Fixes part of bug 19969; bugfix
18147 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
18148 - Work around a bug in the OSX 10.12 SDK that would prevent us from
18149 successfully targeting earlier versions of OSX. Resolves
18152 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
18153 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
18154 20551; bugfix on 0.2.1.1-alpha.
18156 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
18157 - Work around a memory leak in OpenSSL 1.1 when encoding public
18158 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
18160 o Minor features (geoip):
18161 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
18164 Changes in version 0.2.9.6-rc - 2016-12-02
18165 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
18166 version. We hope that it will be ready to become stable soon, and we
18167 encourage everyone to test this release. If no showstopper bugs are
18168 found here, the next 0.2.9 release will be stable.
18170 o Major bugfixes (relay, resolver, logging):
18171 - For relays that don't know their own address, avoid attempting a
18172 local hostname resolve for each descriptor we download. This
18173 will cut down on the number of "Success: chose address 'x.x.x.x'"
18174 log lines, and also avoid confusing clock jumps if the resolver
18175 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
18177 o Minor bugfixes (client, fascistfirewall):
18178 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
18179 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
18181 o Minor bugfixes (hidden services):
18182 - Stop ignoring the anonymity status of saved keys for hidden
18183 services and single onion services when first starting tor.
18184 Instead, refuse to start tor if any hidden service key has been
18185 used in a different hidden service anonymity mode. Fixes bug
18186 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
18188 o Minor bugfixes (portability):
18189 - Work around a bug in the OSX 10.12 SDK that would prevent us from
18190 successfully targeting earlier versions of OSX. Resolves
18192 - Run correctly when built on Windows build environments that
18193 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
18195 o Minor bugfixes (single onion services, Tor2web):
18196 - Stop complaining about long-term one-hop circuits deliberately
18197 created by single onion services and Tor2web. These log messages
18198 are intended to diagnose issue 8387, which relates to circuits
18199 hanging around forever for no reason. Fixes bug 20613; bugfix on
18200 0.2.9.1-alpha. Reported by "pastly".
18202 o Minor bugfixes (unit tests):
18203 - Stop spurious failures in the local interface address discovery
18204 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
18208 - Correct the minimum bandwidth value in torrc.sample, and queue a
18209 corresponding change for torrc.minimal. Closes ticket 20085.
18212 Changes in version 0.2.9.5-alpha - 2016-11-08
18213 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
18214 version. We believe one or two probably remain, and we encourage
18215 everyone to test this release.
18217 o Major bugfixes (client performance):
18218 - Clients now respond to new application stream requests immediately
18219 when they arrive, rather than waiting up to one second before
18220 starting to handle them. Fixes part of bug 19969; bugfix
18223 o Major bugfixes (client reliability):
18224 - When Tor leaves standby because of a new application request, open
18225 circuits as needed to serve that request. Previously, we would
18226 potentially wait a very long time. Fixes part of bug 19969; bugfix
18229 o Major bugfixes (download scheduling):
18230 - When using an exponential backoff schedule, do not give up on
18231 downloading just because we have failed a bunch of times. Since
18232 each delay is longer than the last, retrying indefinitely won't
18233 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
18234 - If a consensus expires while we are waiting for certificates to
18235 download, stop waiting for certificates.
18236 - If we stop waiting for certificates less than a minute after we
18237 started downloading them, do not consider the certificate download
18238 failure a separate failure. Fixes bug 20533; bugfix
18240 - Remove the maximum delay on exponential-backoff scheduling. Since
18241 we now allow an infinite number of failures (see ticket 20536), we
18242 must now allow the time to grow longer on each failure. Fixes part
18243 of bug 20534; bugfix on 0.2.9.1-alpha.
18244 - Make our initial download delays closer to those from 0.2.8. Fixes
18245 another part of bug 20534; bugfix on 0.2.9.1-alpha.
18246 - When determining when to download a directory object, handle times
18247 after 2038 if the operating system supports them. (Someday this
18248 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
18249 - When using exponential backoff in test networks, use a lower
18250 exponent, so the delays do not vary as much. This helps test
18251 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
18253 o Minor features (geoip):
18254 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
18257 o Minor bugfixes (client directory scheduling):
18258 - Treat "relay too busy to answer request" as a failed request and a
18259 reason to back off on our retry frequency. This is safe now that
18260 exponential backoffs retry indefinitely, and avoids a bug where we
18261 would reset our download schedule erroneously. Fixes bug 20593;
18262 bugfix on 0.2.9.1-alpha.
18264 o Minor bugfixes (client, logging):
18265 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
18266 assume all nodes support EXTEND2. Use ntor whenever a key is
18267 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
18268 - On DNSPort, stop logging a BUG warning on a failed hostname
18269 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
18271 o Minor bugfixes (hidden services):
18272 - When configuring hidden services, check every hidden service
18273 directory's permissions. Previously, we only checked the last
18274 hidden service. Fixes bug 20529; bugfix the work to fix 13942
18277 o Minor bugfixes (portability):
18278 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
18279 architectures. Closes ticket 20588.
18280 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
18281 removed the ECDH ciphers which caused the tests to fail on
18282 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
18283 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
18284 20551; bugfix on 0.2.1.1-alpha.
18286 o Minor bugfixes (relay bootstrap):
18287 - Ensure relays don't make multiple connections during bootstrap.
18288 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
18290 o Minor bugfixes (relay):
18291 - Work around a memory leak in OpenSSL 1.1 when encoding public
18292 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
18293 - Avoid a small memory leak when informing worker threads about
18294 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
18295 - Do not try to parallelize workers more than 16x without the user
18296 explicitly configuring us to do so, even if we do detect more than
18297 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
18299 o Minor bugfixes (single onion services):
18300 - Start correctly when creating a single onion service in a
18301 directory that did not previously exist. Fixes bug 20484; bugfix
18304 o Minor bugfixes (testing):
18305 - Avoid a unit test failure on systems with over 16 detectable CPU
18306 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
18309 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
18310 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
18311 - Module-level documentation for several more modules. Closes
18312 tickets 19287 and 19290.
18315 Changes in version 0.2.8.9 - 2016-10-17
18316 Tor 0.2.8.9 backports a fix for a security hole in previous versions
18317 of Tor that would allow a remote attacker to crash a Tor client,
18318 hidden service, relay, or authority. All Tor users should upgrade to
18319 this version, or to 0.2.9.4-alpha. Patches will be released for older
18322 o Major features (security fixes, also in 0.2.9.4-alpha):
18323 - Prevent a class of security bugs caused by treating the contents
18324 of a buffer chunk as if they were a NUL-terminated string. At
18325 least one such bug seems to be present in all currently used
18326 versions of Tor, and would allow an attacker to remotely crash
18327 most Tor instances, especially those compiled with extra compiler
18328 hardening. With this defense in place, such bugs can't crash Tor,
18329 though we should still fix them as they occur. Closes ticket
18330 20384 (TROVE-2016-10-001).
18332 o Minor features (geoip):
18333 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
18337 Changes in version 0.2.9.4-alpha - 2016-10-17
18338 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
18339 that would allow a remote attacker to crash a Tor client, hidden
18340 service, relay, or authority. All Tor users should upgrade to this
18341 version, or to 0.2.8.9. Patches will be released for older versions
18344 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
18345 previous versions of Tor, including the implementation of a feature to
18346 future- proof the Tor ecosystem against protocol changes, some bug
18347 fixes necessary for Tor Browser to use unix domain sockets correctly,
18348 and several portability improvements. We anticipate that this will be
18349 the last alpha in the Tor 0.2.9 series, and that the next release will
18350 be a release candidate.
18352 o Major features (security fixes):
18353 - Prevent a class of security bugs caused by treating the contents
18354 of a buffer chunk as if they were a NUL-terminated string. At
18355 least one such bug seems to be present in all currently used
18356 versions of Tor, and would allow an attacker to remotely crash
18357 most Tor instances, especially those compiled with extra compiler
18358 hardening. With this defense in place, such bugs can't crash Tor,
18359 though we should still fix them as they occur. Closes ticket
18360 20384 (TROVE-2016-10-001).
18362 o Major features (subprotocol versions):
18363 - Tor directory authorities now vote on a set of recommended
18364 subprotocol versions, and on a set of required subprotocol
18365 versions. Clients and relays that lack support for a _required_
18366 subprotocol version will not start; those that lack support for a
18367 _recommended_ subprotocol version will warn the user to upgrade.
18368 Closes ticket 19958; implements part of proposal 264.
18369 - Tor now uses "subprotocol versions" to indicate compatibility.
18370 Previously, versions of Tor looked at the declared Tor version of
18371 a relay to tell whether they could use a given feature. Now, they
18372 should be able to rely on its declared subprotocol versions. This
18373 change allows compatible implementations of the Tor protocol(s) to
18374 exist without pretending to be 100% bug-compatible with particular
18375 releases of Tor itself. Closes ticket 19958; implements part of
18378 o Minor feature (fallback directories):
18379 - Remove broken fallbacks from the hard-coded fallback directory
18380 list. Closes ticket 20190; patch by teor.
18382 o Minor features (client, directory):
18383 - Since authorities now omit all routers that lack the Running and
18384 Valid flags, we assume that any relay listed in the consensus must
18385 have those flags. Closes ticket 20001; implements part of
18388 o Minor features (compilation, portability):
18389 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
18392 o Minor features (development tools, etags):
18393 - Teach the "make tags" Makefile target how to correctly find
18394 "MOCK_IMPL" function definitions. Patch from nherring; closes
18397 o Minor features (geoip):
18398 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
18401 o Minor features (unix domain sockets):
18402 - When configuring a unix domain socket for a SocksPort,
18403 ControlPort, or Hidden service, you can now wrap the address in
18404 quotes, using C-style escapes inside the quotes. This allows unix
18405 domain socket paths to contain spaces.
18407 o Minor features (virtual addresses):
18408 - Increase the maximum number of bits for the IPv6 virtual network
18409 prefix from 16 to 104. In this way, the condition for address
18410 allocation is less restrictive. Closes ticket 20151; feature
18413 o Minor bugfixes (address discovery):
18414 - Stop reordering IP addresses returned by the OS. This makes it
18415 more likely that Tor will guess the same relay IP address every
18416 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
18417 Reported by René Mayrhofer, patch by "cypherpunks".
18419 o Minor bugfixes (client, unix domain sockets):
18420 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
18421 the client address is meaningless. Fixes bug 20261; bugfix
18424 o Minor bugfixes (compilation, OpenBSD):
18425 - Detect Libevent2 functions correctly on systems that provide
18426 libevent2, but where libevent1 is linked with -levent. Fixes bug
18427 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
18429 o Minor bugfixes (configuration):
18430 - When parsing quoted configuration values from the torrc file,
18431 handle windows line endings correctly. Fixes bug 19167; bugfix on
18432 0.2.0.16-alpha. Patch from "Pingl".
18434 o Minor bugfixes (getpass):
18435 - Defensively fix a non-triggerable heap corruption at do_getpass()
18436 to protect ourselves from mistakes in the future. Fixes bug
18437 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
18440 o Minor bugfixes (hidden service):
18441 - Allow hidden services to run on IPv6 addresses even when the
18442 IPv6Exit option is not set. Fixes bug 18357; bugfix
18446 - Add module-level internal documentation for 36 C files that
18447 previously didn't have a high-level overview. Closes ticket #20385.
18449 o Required libraries:
18450 - When building with OpenSSL, Tor now requires version 1.0.1 or
18451 later. OpenSSL 1.0.0 and earlier are no longer supported by the
18452 OpenSSL team, and should not be used. Closes ticket 20303.
18455 Changes in version 0.2.9.3-alpha - 2016-09-23
18456 Tor 0.2.9.3-alpha adds improved support for entities that want to make
18457 high-performance services available through the Tor .onion mechanism
18458 without themselves receiving anonymity as they host those services. It
18459 also tries harder to ensure that all steps on a circuit are using the
18460 strongest crypto possible, strengthens some TLS properties, and
18461 resolves several bugs -- including a pair of crash bugs from the 0.2.8
18462 series. Anybody running an earlier version of 0.2.9.x should upgrade.
18464 o Major bugfixes (crash, also in 0.2.8.8):
18465 - Fix a complicated crash bug that could affect Tor clients
18466 configured to use bridges when replacing a networkstatus consensus
18467 in which one of their bridges was mentioned. OpenBSD users saw
18468 more crashes here, but all platforms were potentially affected.
18469 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18471 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
18472 - Fix a timing-dependent assertion failure that could occur when we
18473 tried to flush from a circuit after having freed its cells because
18474 of an out-of-memory condition. Fixes bug 20203; bugfix on
18475 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18478 o Major features (circuit building, security):
18479 - Authorities, relays and clients now require ntor keys in all
18480 descriptors, for all hops (except for rare hidden service protocol
18481 cases), for all circuits, and for all other roles. Part of
18483 - Tor authorities, relays, and clients only use ntor, except for
18484 rare cases in the hidden service protocol. Part of ticket 19163.
18486 o Major features (single-hop "hidden" services):
18487 - Add experimental HiddenServiceSingleHopMode and
18488 HiddenServiceNonAnonymousMode options. When both are set to 1,
18489 every hidden service on a Tor instance becomes a non-anonymous
18490 Single Onion Service. Single Onions make one-hop (direct)
18491 connections to their introduction and rendezvous points. One-hop
18492 circuits make Single Onion servers easily locatable, but clients
18493 remain location-anonymous. This is compatible with the existing
18494 hidden service implementation, and works on the current tor
18495 network without any changes to older relays or clients. Implements
18496 proposal 260, completes ticket 17178. Patch by teor and asn.
18498 o Major features (resource management):
18499 - Tor can now notice it is about to run out of sockets, and
18500 preemptively close connections of lower priority. (This feature is
18501 off by default for now, since the current prioritizing method is
18502 yet not mature enough. You can enable it by setting
18503 "DisableOOSCheck 0", but watch out: it might close some sockets
18504 you would rather have it keep.) Closes ticket 18640.
18506 o Major bugfixes (circuit building):
18507 - Hidden service client-to-intro-point and service-to-rendezvous-
18508 point circuits use the TAP key supplied by the protocol, to avoid
18509 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
18511 o Major bugfixes (compilation, OpenBSD):
18512 - Fix a Libevent-detection bug in our autoconf script that would
18513 prevent Tor from linking successfully on OpenBSD. Patch from
18514 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
18516 o Major bugfixes (hidden services):
18517 - Clients now require hidden services to include the TAP keys for
18518 their intro points in the hidden service descriptor. This prevents
18519 an inadvertent upgrade to ntor, which a malicious hidden service
18520 could use to distinguish clients by consensus version. Fixes bug
18521 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
18523 o Minor features (security, TLS):
18524 - Servers no longer support clients that without AES ciphersuites.
18525 (3DES is no longer considered an acceptable cipher.) We believe
18526 that no such Tor clients currently exist, since Tor has required
18527 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
18529 o Minor feature (fallback directories):
18530 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18531 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18532 2016. Closes ticket 20190; patch by teor.
18534 o Minor features (geoip, also in 0.2.8.8):
18535 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18538 o Minor feature (port flags):
18539 - Add new flags to the *Port options to finer control over which
18540 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
18541 and the synthetic flag OnionTrafficOnly, which is equivalent to
18542 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
18543 18693; patch by "teor".
18545 o Minor features (directory authority):
18546 - After voting, if the authorities decide that a relay is not
18547 "Valid", they no longer include it in the consensus at all. Closes
18548 ticket 20002; implements part of proposal 272.
18550 o Minor features (testing):
18551 - Disable memory protections on OpenBSD when performing our unit
18552 tests for memwipe(). The test deliberately invokes undefined
18553 behavior, and the OpenBSD protections interfere with this. Patch
18554 from "rubiate". Closes ticket 20066.
18556 o Minor features (testing, ipv6):
18557 - Add the single-onion and single-onion-ipv6 chutney targets to
18558 "make test-network-all". This requires a recent chutney version
18559 with the single onion network flavours (git c72a652 or later).
18560 Closes ticket 20072; patch by teor.
18561 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
18562 tests. Remove bridges+hs, as it's somewhat redundant. This
18563 requires a recent chutney version that supports IPv6 clients,
18564 relays, and authorities. Closes ticket 20069; patch by teor.
18566 o Minor features (Tor2web):
18567 - Make Tor2web clients respect ReachableAddresses. This feature was
18568 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
18569 0.2.8.7. Implements feature 20034. Patch by teor.
18571 o Minor features (unit tests):
18572 - We've done significant work to make the unit tests run faster.
18573 - Our link-handshake unit tests now check that when invalid
18574 handshakes fail, they fail with the error messages we expected.
18575 - Our unit testing code that captures log messages no longer
18576 prevents them from being written out if the user asked for them
18577 (by passing --debug or --info or or --notice --warn to the "test"
18578 binary). This change prevents us from missing unexpected log
18579 messages simply because we were looking for others. Related to
18581 - The unit tests now log all warning messages with the "BUG" flag.
18582 Previously, they only logged errors by default. This change will
18583 help us make our testing code more correct, and make sure that we
18584 only hit this code when we mean to. In the meantime, however,
18585 there will be more warnings in the unit test logs than before.
18586 This is preparatory work for ticket 19999.
18587 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
18588 assertion as a test failure.
18590 o Minor bug fixes (circuits):
18591 - Use the CircuitBuildTimeout option whenever
18592 LearnCircuitBuildTimeout is disabled. Previously, we would respect
18593 the option when a user disabled it, but not when it was disabled
18594 because some other option was set. Fixes bug 20073; bugfix on
18595 0.2.4.12-alpha. Patch by teor.
18597 o Minor bugfixes (allocation):
18598 - Change how we allocate memory for large chunks on buffers, to
18599 avoid a (currently impossible) integer overflow, and to waste less
18600 space when allocating unusually large chunks. Fixes bug 20081;
18601 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
18602 - Always include orconfig.h before including any other C headers.
18603 Sometimes, it includes macros that affect the behavior of the
18604 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
18605 first version to use AC_USE_SYSTEM_EXTENSIONS).
18606 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
18607 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
18608 Patch from Gisle Vanem.
18609 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
18610 They apparently require a set of annotations that we aren't
18611 currently using, and they create false positives in our pthreads
18612 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
18614 o Minor bugfixes (directory authority):
18615 - Die with a more useful error when the operator forgets to place
18616 the authority_signing_key file into the keys directory. This
18617 avoids an uninformative assert & traceback about having an invalid
18618 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
18619 - When allowing private addresses, mark Exits that only exit to
18620 private locations as such. Fixes bug 20064; bugfix
18623 o Minor bugfixes (documentation):
18624 - Document the default PathsNeededToBuildCircuits value that's used
18625 by clients when the directory authorities don't set
18626 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
18627 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
18628 - Fix manual for the User option: it takes a username, not a UID.
18629 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
18632 o Minor bugfixes (hidden services):
18633 - Stop logging intro point details to the client log on certain
18634 error conditions. Fixed as part of bug 20012; bugfix on
18635 0.2.4.8-alpha. Patch by teor.
18637 o Minor bugfixes (IPv6, testing):
18638 - Check for IPv6 correctly on Linux when running test networks.
18639 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
18641 o Minor bugfixes (Linux seccomp2 sandbox):
18642 - Add permission to run the sched_yield() and sigaltstack() system
18643 calls, in order to support versions of Tor compiled with asan or
18644 ubsan code that use these calls. Now "sandbox 1" and
18645 "--enable-expensive-hardening" should be compatible on more
18646 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
18648 o Minor bugfixes (logging):
18649 - When logging a message from the BUG() macro, be explicit about
18650 what we were asserting. Previously we were confusing what we were
18651 asserting with what the bug was. Fixes bug 20093; bugfix
18653 - When we are unable to remove the bw_accounting file, do not warn
18654 if the reason we couldn't remove it was that it didn't exist.
18655 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
18657 o Minor bugfixes (option parsing):
18658 - Count unix sockets when counting client listeners (SOCKS, Trans,
18659 NATD, and DNS). This has no user-visible behaviour changes: these
18660 options are set once, and never read. Required for correct
18661 behaviour in ticket 17178. Fixes bug 19677; bugfix on
18662 0.2.6.3-alpha. Patch by teor.
18664 o Minor bugfixes (options):
18665 - Check the consistency of UseEntryGuards and EntryNodes more
18666 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
18668 - Stop changing the configured value of UseEntryGuards on
18669 authorities and Tor2web clients. Fixes bug 20074; bugfix on
18670 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
18673 o Minor bugfixes (Tor2web):
18674 - Prevent Tor2web clients running hidden services, these services
18675 are not anonymous due to the one-hop client paths. Fixes bug
18676 19678. Patch by teor.
18678 o Minor bugfixes (unit tests):
18679 - Fix a shared-random unit test that was failing on big endian
18680 architectures due to internal representation of a integer copied
18681 to a buffer. The test is changed to take a full 32 bytes of data
18682 and use the output of a python script that make the COMMIT and
18683 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
18685 - The tor_tls_server_info_callback unit test no longer crashes when
18686 debug-level logging is turned on. Fixes bug 20041; bugfix
18690 Changes in version 0.2.8.8 - 2016-09-23
18691 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
18692 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
18693 who select public relays as their bridges.
18695 o Major bugfixes (crash):
18696 - Fix a complicated crash bug that could affect Tor clients
18697 configured to use bridges when replacing a networkstatus consensus
18698 in which one of their bridges was mentioned. OpenBSD users saw
18699 more crashes here, but all platforms were potentially affected.
18700 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18702 o Major bugfixes (relay, OOM handler):
18703 - Fix a timing-dependent assertion failure that could occur when we
18704 tried to flush from a circuit after having freed its cells because
18705 of an out-of-memory condition. Fixes bug 20203; bugfix on
18706 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18709 o Minor feature (fallback directories):
18710 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18711 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18712 2016. Closes ticket 20190; patch by teor.
18714 o Minor features (geoip):
18715 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18719 Changes in version 0.2.9.2-alpha - 2016-08-24
18720 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
18721 several new features and bugfixes. It also includes an important
18722 authority update and an important bugfix from 0.2.8.7. Everyone who
18723 sets the ReachableAddresses option, and all bridges, are strongly
18724 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
18726 o Directory authority changes (also in 0.2.8.7):
18727 - The "Tonga" bridge authority has been retired; the new bridge
18728 authority is "Bifroest". Closes tickets 19728 and 19690.
18730 o Major bugfixes (client, security, also in 0.2.8.7):
18731 - Only use the ReachableAddresses option to restrict the first hop
18732 in a path. In earlier versions of 0.2.8.x, it would apply to
18733 every hop in the path, with a possible degradation in anonymity
18734 for anyone using an uncommon ReachableAddress setting. Fixes bug
18735 19973; bugfix on 0.2.8.2-alpha.
18737 o Major features (user interface):
18738 - Tor now supports the ability to declare options deprecated, so
18739 that we can recommend that people stop using them. Previously,
18740 this was done in an ad-hoc way. Closes ticket 19820.
18742 o Major bugfixes (directory downloads):
18743 - Avoid resetting download status for consensuses hourly, since we
18744 already have another, smarter retry mechanism. Fixes bug 8625;
18745 bugfix on 0.2.0.9-alpha.
18747 o Minor features (config):
18748 - Warn users when descriptor and port addresses are inconsistent.
18749 Mitigates bug 13953; patch by teor.
18751 o Minor features (geoip):
18752 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18755 o Minor features (user interface):
18756 - There is a new --list-deprecated-options command-line option to
18757 list all of the deprecated options. Implemented as part of
18760 o Minor bugfixes (code style):
18761 - Fix an integer signedness conversion issue in the case conversion
18762 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
18764 o Minor bugfixes (compilation):
18765 - Build correctly on versions of libevent2 without support for
18766 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
18768 - Fix a compilation warning on GCC versions before 4.6. Our
18769 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
18770 when it is also required as an argument to the compiler pragma.
18771 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
18773 o Minor bugfixes (compilation, also in 0.2.8.7):
18774 - Remove an inappropriate "inline" in tortls.c that was causing
18775 warnings on older versions of GCC. Fixes bug 19903; bugfix
18778 o Minor bugfixes (fallback directories, also in 0.2.8.7):
18779 - Avoid logging a NULL string pointer when loading fallback
18780 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18781 and 0.2.8.1-alpha. Report and patch by "rubiate".
18783 o Minor bugfixes (logging):
18784 - Log a more accurate message when we fail to dump a microdescriptor.
18785 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
18787 o Minor bugfixes (memory leak):
18788 - Fix a series of slow memory leaks related to parsing torrc files
18789 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
18791 o Deprecated features:
18792 - A number of DNS-cache-related sub-options for client ports are now
18793 deprecated for security reasons, and may be removed in a future
18794 version of Tor. (We believe that client-side DNS caching is a bad
18795 idea for anonymity, and you should not turn it on.) The options
18796 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
18797 UseIPv4Cache, and UseIPv6Cache.
18798 - A number of options are deprecated for security reasons, and may
18799 be removed in a future version of Tor. The options are:
18800 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
18801 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
18802 CloseHSClientCircuitsImmediatelyOnTimeout,
18803 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
18804 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
18805 UseNTorHandshake, and WarnUnsafeSocks.
18806 - The *ListenAddress options are now deprecated as unnecessary: the
18807 corresponding *Port options should be used instead. These options
18808 may someday be removed. The affected options are:
18809 ControlListenAddress, DNSListenAddress, DirListenAddress,
18810 NATDListenAddress, ORListenAddress, SocksListenAddress,
18811 and TransListenAddress.
18814 - Correct the IPv6 syntax in our documentation for the
18815 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
18818 - We no longer include the (dead, deprecated) bufferevent code in
18819 Tor. Closes ticket 19450. Based on a patch from U+039b.
18822 Changes in version 0.2.8.7 - 2016-08-24
18823 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
18824 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
18825 who sets the ReachableAddresses option, and all bridges, are strongly
18826 encouraged to upgrade.
18828 o Directory authority changes:
18829 - The "Tonga" bridge authority has been retired; the new bridge
18830 authority is "Bifroest". Closes tickets 19728 and 19690.
18832 o Major bugfixes (client, security):
18833 - Only use the ReachableAddresses option to restrict the first hop
18834 in a path. In earlier versions of 0.2.8.x, it would apply to
18835 every hop in the path, with a possible degradation in anonymity
18836 for anyone using an uncommon ReachableAddress setting. Fixes bug
18837 19973; bugfix on 0.2.8.2-alpha.
18839 o Minor features (geoip):
18840 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18843 o Minor bugfixes (compilation):
18844 - Remove an inappropriate "inline" in tortls.c that was causing
18845 warnings on older versions of GCC. Fixes bug 19903; bugfix
18848 o Minor bugfixes (fallback directories):
18849 - Avoid logging a NULL string pointer when loading fallback
18850 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18851 and 0.2.8.1-alpha. Report and patch by "rubiate".
18854 Changes in version 0.2.9.1-alpha - 2016-08-08
18855 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
18856 series. It improves our support for hardened builds and compiler
18857 warnings, deploys some critical infrastructure for improvements to
18858 hidden services, includes a new timing backend that we hope to use for
18859 better support for traffic padding, makes it easier for programmers to
18860 log unexpected events, and contains other small improvements to
18861 security, correctness, and performance.
18863 Below are the changes since 0.2.8.6.
18865 o New system requirements:
18866 - Tor now requires Libevent version 2.0.10-stable or later. Older
18867 versions of Libevent have less efficient backends for several
18868 platforms, and lack the DNS code that we use for our server-side
18869 DNS support. This implements ticket 19554.
18870 - Tor now requires zlib version 1.2 or later, for security,
18871 efficiency, and (eventually) gzip support. (Back when we started,
18872 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
18873 released in 2003. We recommend the latest version.)
18875 o Major features (build, hardening):
18876 - Tor now builds with -ftrapv by default on compilers that support
18877 it. This option detects signed integer overflow (which C forbids),
18878 and turns it into a hard-failure. We do not apply this option to
18879 code that needs to run in constant time to avoid side-channels;
18880 instead, we use -fwrapv in that code. Closes ticket 17983.
18881 - When --enable-expensive-hardening is selected, stop applying the
18882 clang/gcc sanitizers to code that needs to run in constant time.
18883 Although we are aware of no introduced side-channels, we are not
18884 able to prove that there are none. Related to ticket 17983.
18886 o Major features (compilation):
18887 - Our big list of extra GCC warnings is now enabled by default when
18888 building with GCC (or with anything like Clang that claims to be
18889 GCC-compatible). To make all warnings into fatal compilation
18890 errors, pass --enable-fatal-warnings to configure. Closes
18892 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
18893 turn on C and POSIX extensions. (Previously, we attempted to do
18894 this on an ad hoc basis.) Closes ticket 19139.
18896 o Major features (directory authorities, hidden services):
18897 - Directory authorities can now perform the shared randomness
18898 protocol specified by proposal 250. Using this protocol, directory
18899 authorities generate a global fresh random value every day. In the
18900 future, this value will be used by hidden services to select
18901 HSDirs. This release implements the directory authority feature;
18902 the hidden service side will be implemented in the future as part
18903 of proposal 224. Resolves ticket 16943; implements proposal 250.
18905 o Major features (downloading, random exponential backoff):
18906 - When we fail to download an object from a directory service, wait
18907 for an (exponentially increasing) randomized amount of time before
18908 retrying, rather than a fixed interval as we did before. This
18909 prevents a group of Tor instances from becoming too synchronized,
18910 or a single Tor instance from becoming too predictable, in its
18911 download schedule. Closes ticket 15942.
18913 o Major bugfixes (exit policies):
18914 - Avoid disclosing exit outbound bind addresses, configured port
18915 bind addresses, and local interface addresses in relay descriptors
18916 by default under ExitPolicyRejectPrivate. Instead, only reject
18917 these (otherwise unlisted) addresses if
18918 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
18919 0.2.7.2-alpha. Patch by teor.
18921 o Major bugfixes (hidden service client):
18922 - Allow Tor clients with appropriate controllers to work with
18923 FetchHidServDescriptors set to 0. Previously, this option also
18924 disabled descriptor cache lookup, thus breaking hidden services
18925 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
18927 o Minor features (build, hardening):
18928 - Detect and work around a libclang_rt problem that would prevent
18929 clang from finding __mulodi4() on some 32-bit platforms, and thus
18930 keep -ftrapv from linking on those systems. Closes ticket 19079.
18931 - When building on a system without runtime support for the runtime
18932 hardening options, try to log a useful warning at configuration
18933 time, rather than an incomprehensible warning at link time. If
18934 expensive hardening was requested, this warning becomes an error.
18935 Closes ticket 18895.
18937 o Minor features (code safety):
18938 - In our integer-parsing functions, ensure that maxiumum value we
18939 give is no smaller than the minimum value. Closes ticket 19063;
18942 o Minor features (controller):
18943 - Implement new GETINFO queries for all downloads that use
18944 download_status_t to schedule retries. This allows controllers to
18945 examine the schedule for pending downloads. Closes ticket 19323.
18946 - Allow controllers to configure basic client authorization on
18947 hidden services when they create them with the ADD_ONION control
18948 command. Implements ticket 15588. Patch by "special".
18949 - Fire a STATUS_SERVER controller event whenever the hibernation
18950 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
18952 o Minor features (directory authority):
18953 - Directory authorities now only give the Guard flag to a relay if
18954 they are also giving it the Stable flag. This change allows us to
18955 simplify path selection for clients. It should have minimal effect
18956 in practice, since >99% of Guards already have the Stable flag.
18957 Implements ticket 18624.
18958 - Directory authorities now write their v3-status-votes file out to
18959 disk earlier in the consensus process, so we have a record of the
18960 votes even if we abort the consensus process. Resolves
18963 o Minor features (hidden service):
18964 - Stop being so strict about the payload length of "rendezvous1"
18965 cells. We used to be locked in to the "TAP" handshake length, and
18966 now we can handle better handshakes like "ntor". Resolves
18969 o Minor features (infrastructure, time):
18970 - Tor now uses the operating system's monotonic timers (where
18971 available) for internal fine-grained timing. Previously we would
18972 look at the system clock, and then attempt to compensate for the
18973 clock running backwards. Closes ticket 18908.
18974 - Tor now includes an improved timer backend, so that we can
18975 efficiently support tens or hundreds of thousands of concurrent
18976 timers, as will be needed for some of our planned anti-traffic-
18977 analysis work. This code is based on William Ahern's "timeout.c"
18978 project, which implements a "tickless hierarchical timing wheel".
18979 Closes ticket 18365.
18981 o Minor features (logging):
18982 - Provide a more useful warning message when configured with an
18983 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
18984 - When dumping unparseable router descriptors, optionally store them
18985 in separate files, named by digest, up to a configurable size
18986 limit. You can change the size limit by setting the
18987 MaxUnparseableDescSizeToLog option, and disable this feature by
18988 setting that option to 0. Closes ticket 18322.
18989 - Add a set of macros to check nonfatal assertions, for internal
18990 use. Migrating more of our checks to these should help us avoid
18991 needless crash bugs. Closes ticket 18613.
18993 o Minor features (performance):
18994 - Change the "optimistic data" extension from "off by default" to
18995 "on by default". The default was ordinarily overridden by a
18996 consensus option, but when clients were bootstrapping for the
18997 first time, they would not have a consensus to get the option
18998 from. Changing this default saves a round-trip during startup.
18999 Closes ticket 18815.
19001 o Minor features (relay, usability):
19002 - When the directory authorities refuse a bad relay's descriptor,
19003 encourage the relay operator to contact us. Many relay operators
19004 won't notice this line in their logs, but it's a win if even a few
19005 learn why we don't like what their relay was doing. Resolves
19008 o Minor features (testing):
19009 - Let backtrace tests work correctly under AddressSanitizer. Fixes
19010 part of bug 18934; bugfix on 0.2.5.2-alpha.
19011 - Move the test-network.sh script to chutney, and modify tor's test-
19012 network.sh to call the (newer) chutney version when available.
19013 Resolves ticket 19116. Patch by teor.
19014 - Use the lcov convention for marking lines as unreachable, so that
19015 we don't count them when we're generating test coverage data.
19016 Update our coverage tools to understand this convention. Closes
19019 o Minor bugfixes (bootstrap):
19020 - Remember the directory we fetched the consensus or previous
19021 certificates from, and use it to fetch future authority
19022 certificates. This change improves bootstrapping performance.
19023 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
19025 o Minor bugfixes (build):
19026 - The test-stem and test-network makefile targets now depend only on
19027 the tor binary that they are testing. Previously, they depended on
19028 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
19029 patch from "cypherpunks".
19031 o Minor bugfixes (circuits):
19032 - Make sure extend_info_from_router() is only called on servers.
19033 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
19035 o Minor bugfixes (compilation):
19036 - When building with Clang, use a full set of GCC warnings.
19037 (Previously, we included only a subset, because of the way we
19038 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
19040 o Minor bugfixes (directory authority):
19041 - Authorities now sort the "package" lines in their votes, for ease
19042 of debugging. (They are already sorted in consensus documents.)
19043 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
19044 - When parsing a detached signature, make sure we use the length of
19045 the digest algorithm instead of an hardcoded DIGEST256_LEN in
19046 order to avoid comparing bytes out-of-bounds with a smaller digest
19047 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
19049 o Minor bugfixes (documentation):
19050 - Document the --passphrase-fd option in the tor manpage. Fixes bug
19051 19504; bugfix on 0.2.7.3-rc.
19052 - Fix the description of the --passphrase-fd option in the
19053 tor-gencert manpage. The option is used to pass the number of a
19054 file descriptor to read the passphrase from, not to read the file
19055 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
19057 o Minor bugfixes (ephemeral hidden service):
19058 - When deleting an ephemeral hidden service, close its intro points
19059 even if they are not completely open. Fixes bug 18604; bugfix
19062 o Minor bugfixes (guard selection):
19063 - Use a single entry guard even if the NumEntryGuards consensus
19064 parameter is not provided. Fixes bug 17688; bugfix
19066 - Don't mark guards as unreachable if connection_connect() fails.
19067 That function fails for local reasons, so it shouldn't reveal
19068 anything about the status of the guard. Fixes bug 14334; bugfix
19071 o Minor bugfixes (hidden service client):
19072 - Increase the minimum number of internal circuits we preemptively
19073 build from 2 to 3, so a circuit is available when a client
19074 connects to another onion service. Fixes bug 13239; bugfix
19077 o Minor bugfixes (logging):
19078 - When logging a directory ownership mismatch, log the owning
19079 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
19081 o Minor bugfixes (memory leaks):
19082 - Fix a small, uncommon memory leak that could occur when reading a
19083 truncated ed25519 key file. Fixes bug 18956; bugfix
19086 o Minor bugfixes (testing):
19087 - Allow clients to retry HSDirs much faster in test networks. Fixes
19088 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
19089 - Disable ASAN's detection of segmentation faults while running
19090 test_bt.sh, so that we can make sure that our own backtrace
19091 generation code works. Fixes another aspect of bug 18934; bugfix
19092 on 0.2.5.2-alpha. Patch from "cypherpunks".
19093 - Fix the test-network-all target on out-of-tree builds by using the
19094 correct path to the test driver script. Fixes bug 19421; bugfix
19097 o Minor bugfixes (time):
19098 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
19099 bugfix on all released tor versions.
19100 - When computing the difference between two times in milliseconds,
19101 we now round to the nearest millisecond correctly. Previously, we
19102 could sometimes round in the wrong direction. Fixes bug 19428;
19103 bugfix on 0.2.2.2-alpha.
19105 o Minor bugfixes (user interface):
19106 - Display a more accurate number of suppressed messages in the log
19107 rate-limiter. Previously, there was a potential integer overflow
19108 in the counter. Now, if the number of messages hits a maximum, the
19109 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
19111 - Fix a typo in the passphrase prompt for the ed25519 identity key.
19112 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
19114 o Code simplification and refactoring:
19115 - Remove redundant declarations of the MIN macro. Closes
19117 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
19118 Closes ticket 18462; patch from "icanhasaccount".
19119 - Split the 600-line directory_handle_command_get function into
19120 separate functions for different URL types. Closes ticket 16698.
19123 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
19124 ticket 19153. Patch from "U+039b".
19126 o Removed features:
19127 - Remove support for "GET /tor/bytes.txt" DirPort request, and
19128 "GETINFO dir-usage" controller request, which were only available
19129 via a compile-time option in Tor anyway. Feature was added in
19130 0.2.2.1-alpha. Resolves ticket 19035.
19131 - There is no longer a compile-time option to disable support for
19132 TransPort. (If you don't want TransPort; just don't use it.) Patch
19133 from "U+039b". Closes ticket 19449.
19136 - Run more workqueue tests as part of "make check". These had
19137 previously been implemented, but you needed to know special
19138 command-line options to enable them.
19139 - We now have unit tests for our code to reject zlib "compression
19140 bombs". (Fortunately, the code works fine.)
19143 Changes in version 0.2.8.6 - 2016-08-02
19145 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
19147 The Tor 0.2.8 series improves client bootstrapping performance,
19148 completes the authority-side implementation of improved identity
19149 keys for relays, and includes numerous bugfixes and performance
19150 improvements throughout the program. This release continues to
19151 improve the coverage of Tor's test suite. For a full list of
19152 changes since Tor 0.2.7, see the ReleaseNotes file.
19154 Changes since 0.2.8.5-rc:
19156 o Minor features (geoip):
19157 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
19160 o Minor bugfixes (compilation):
19161 - Fix a compilation warning in the unit tests on systems where char
19162 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
19164 o Minor bugfixes (fallback directories):
19165 - Remove 1 fallback that was on the hardcoded list, then opted-out,
19166 leaving 89 of the 100 fallbacks originally introduced in Tor
19167 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
19169 o Minor bugfixes (Linux seccomp2 sandbox):
19170 - Allow more syscalls when running with "Sandbox 1" enabled:
19171 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
19172 some systems, these are required for Tor to start. Fixes bug
19173 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
19174 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
19175 so that get_interface_address6_via_udp_socket_hack() can work.
19176 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
19179 Changes in version 0.2.8.5-rc - 2016-07-07
19180 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
19181 series. If we find no new bugs or regressions here, the first stable
19182 0.2.8 release will be identical to it. It has a few small bugfixes
19183 against previous versions.
19185 o Directory authority changes:
19186 - Urras is no longer a directory authority. Closes ticket 19271.
19188 o Major bugfixes (heartbeat):
19189 - Fix a regression that would crash Tor when the periodic
19190 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
19191 0.2.8.1-alpha. Reported by "kubaku".
19193 o Minor features (build):
19194 - Tor now again builds with the recent OpenSSL 1.1 development
19195 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
19196 - When building manual pages, set the timezone to "UTC", so that the
19197 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
19198 Patch from intrigeri.
19200 o Minor bugfixes (fallback directory selection):
19201 - Avoid errors during fallback selection if there are no eligible
19202 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
19205 o Minor bugfixes (IPv6, microdescriptors):
19206 - Don't check node addresses when we only have a routerstatus. This
19207 allows IPv6-only clients to bootstrap by fetching microdescriptors
19208 from fallback directory mirrors. (The microdescriptor consensus
19209 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
19212 o Minor bugfixes (logging):
19213 - Reduce pointlessly verbose log messages when directory servers
19214 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
19215 0.2.8.1-alpha. Patch by teor.
19216 - When a fallback directory changes its fingerprint from the hard-
19217 coded fingerprint, log a less severe, more explanatory log
19218 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
19220 o Minor bugfixes (Linux seccomp2 sandboxing):
19221 - Allow statistics to be written to disk when "Sandbox 1" is
19222 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
19223 0.2.6.1-alpha respectively.
19225 o Minor bugfixes (user interface):
19226 - Remove a warning message "Service [scrubbed] not found after
19227 descriptor upload". This message appears when one uses HSPOST
19228 control command to upload a service descriptor. Since there is
19229 only a descriptor and no service, showing this message is
19230 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
19232 o Fallback directory list:
19233 - Add a comment to the generated fallback directory list that
19234 explains how to comment out unsuitable fallbacks in a way that's
19235 compatible with the stem fallback parser.
19236 - Update fallback whitelist and blacklist based on relay operator
19237 emails. Blacklist unsuitable (non-working, over-volatile)
19238 fallbacks. Resolves ticket 19071. Patch by teor.
19239 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
19240 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
19241 ticket 19071; patch by teor.
19244 Changes in version 0.2.8.4-rc - 2016-06-15
19245 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
19246 If we find no new bugs or regressions here, the first stable 0.2.8
19247 release will be identical to it. It has a few small bugfixes against
19250 o Major bugfixes (user interface):
19251 - Correctly give a warning in the cases where a relay is specified
19252 by nickname, and one such relay is found, but it is not officially
19253 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
19255 o Minor features (build):
19256 - Tor now builds once again with the recent OpenSSL 1.1 development
19257 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
19259 o Minor features (geoip):
19260 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
19263 o Minor bugfixes (compilation):
19264 - Cause the unit tests to compile correctly on mingw64 versions that
19265 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
19267 o Minor bugfixes (downloading):
19268 - Predict more correctly whether we'll be downloading over HTTP when
19269 we determine the maximum length of a URL. This should avoid a
19270 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
19274 Changes in version 0.2.8.3-alpha - 2016-05-26
19275 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
19276 the course of the 0.2.8 development cycle. It improves the behavior of
19277 directory clients, fixes several crash bugs, fixes a gap in compiler
19278 hardening, and allows the full integration test suite to run on
19281 o Major bugfixes (security, client, DNS proxy):
19282 - Stop a crash that could occur when a client running with DNSPort
19283 received a query with multiple address types, and the first
19284 address type was not supported. Found and fixed by Scott Dial.
19285 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
19287 o Major bugfixes (security, compilation):
19288 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
19289 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
19290 cause a compiler warning, thereby making other checks fail, and
19291 needlessly disabling compiler-hardening support. Fixes one case of
19292 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
19294 o Major bugfixes (security, directory authorities):
19295 - Fix a crash and out-of-bounds write during authority voting, when
19296 the list of relays includes duplicate ed25519 identity keys. Fixes
19297 bug 19032; bugfix on 0.2.8.2-alpha.
19299 o Major bugfixes (client, bootstrapping):
19300 - Check if bootstrap consensus downloads are still needed when the
19301 linked connection attaches. This prevents tor making unnecessary
19302 begindir-style connections, which are the only directory
19303 connections tor clients make since the fix for 18483 was merged.
19304 - Fix some edge cases where consensus download connections may not
19305 have been closed, even though they were not needed. Related to fix
19307 - Make relays retry consensus downloads the correct number of times,
19308 rather than the more aggressive client retry count. Fixes part of
19310 - Stop downloading consensuses when we have a consensus, even if we
19311 don't have all the certificates for it yet. Fixes bug 18809;
19312 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
19314 o Major bugfixes (directory mirrors):
19315 - Decide whether to advertise begindir support in the the same way
19316 we decide whether to advertise our DirPort. Allowing these
19317 decisions to become out-of-sync led to surprising behavior like
19318 advertising begindir support when hibernation made us not
19319 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
19322 o Major bugfixes (IPv6 bridges, client):
19323 - Actually use IPv6 addresses when selecting directory addresses for
19324 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
19327 o Major bugfixes (key management):
19328 - If OpenSSL fails to generate an RSA key, do not retain a dangling
19329 pointer to the previous (uninitialized) key value. The impact here
19330 should be limited to a difficult-to-trigger crash, if OpenSSL is
19331 running an engine that makes key generation failures possible, or
19332 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
19333 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
19336 o Major bugfixes (testing):
19337 - Fix a bug that would block 'make test-network-all' on systems where
19338 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
19339 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
19340 bugfix on 0.2.8.1-alpha.
19342 o Minor features (clients):
19343 - Make clients, onion services, and bridge relays always use an
19344 encrypted begindir connection for directory requests. Resolves
19345 ticket 18483. Patch by "teor".
19347 o Minor features (fallback directory mirrors):
19348 - Give each fallback the same weight for client selection; restrict
19349 fallbacks to one per operator; report fallback directory detail
19350 changes when rebuilding list; add new fallback directory mirrors
19351 to the whitelist; and many other minor simplifications and fixes.
19352 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
19353 0.2.8.1-alpha; patch by "teor".
19354 - Replace the 21 fallbacks generated in January 2016 and included in
19355 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
19356 2016. Closes task 17158; patch by "teor".
19358 o Minor features (geoip):
19359 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
19362 o Minor bugfixes (assert, portability):
19363 - Fix an assertion failure in memarea.c on systems where "long" is
19364 shorter than the size of a pointer. Fixes bug 18716; bugfix
19367 o Minor bugfixes (bootstrap):
19368 - Consistently use the consensus download schedule for authority
19369 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
19371 o Minor bugfixes (build):
19372 - Remove a pair of redundant AM_CONDITIONAL declarations from
19373 configure.ac. Fixes one final case of bug 17744; bugfix
19375 - Resolve warnings when building on systems that are concerned with
19376 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
19378 - When libscrypt.h is found, but no libscrypt library can be linked,
19379 treat libscrypt as absent. Fixes bug 19161; bugfix
19382 o Minor bugfixes (client):
19383 - Turn all TestingClientBootstrap* into non-testing torrc options.
19384 This changes simply renames them by removing "Testing" in front of
19385 them and they do not require TestingTorNetwork to be enabled
19386 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
19387 - Make directory node selection more reliable, mainly for IPv6-only
19388 clients and clients with few reachable addresses. Fixes bug 18929;
19389 bugfix on 0.2.8.1-alpha. Patch by "teor".
19391 o Minor bugfixes (controller, microdescriptors):
19392 - Make GETINFO dir/status-vote/current/consensus conform to the
19393 control specification by returning "551 Could not open cached
19394 consensus..." when not caching consensuses. Fixes bug 18920;
19395 bugfix on 0.2.2.6-alpha.
19397 o Minor bugfixes (crypto, portability):
19398 - The SHA3 and SHAKE routines now produce the correct output on Big
19399 Endian systems. No code calls either algorithm yet, so this is
19400 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
19401 - Tor now builds again with the recent OpenSSL 1.1 development
19402 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
19405 o Minor bugfixes (directories):
19406 - When fetching extrainfo documents, compare their SHA256 digests
19407 and Ed25519 signing key certificates with the routerinfo that led
19408 us to fetch them, rather than with the most recent routerinfo.
19409 Otherwise we generate many spurious warnings about mismatches.
19410 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
19412 o Minor bugfixes (logging):
19413 - When we can't generate a signing key because OfflineMasterKey is
19414 set, do not imply that we should have been able to load it. Fixes
19415 bug 18133; bugfix on 0.2.7.2-alpha.
19416 - Stop periodic_event_dispatch() from blasting twelve lines per
19417 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
19418 - When rejecting a misformed INTRODUCE2 cell, only log at
19419 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
19421 o Minor bugfixes (pluggable transports):
19422 - Avoid reporting a spurious error when we decide that we don't need
19423 to terminate a pluggable transport because it has already exited.
19424 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
19426 o Minor bugfixes (pointer arithmetic):
19427 - Fix a bug in memarea_alloc() that could have resulted in remote
19428 heap write access, if Tor had ever passed an unchecked size to
19429 memarea_alloc(). Fortunately, all the sizes we pass to
19430 memarea_alloc() are pre-checked to be less than 128 kilobytes.
19431 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
19434 o Minor bugfixes (relays):
19435 - Consider more config options when relays decide whether to
19436 regenerate their descriptor. Fixes more of bug 12538; bugfix
19438 - Resolve some edge cases where we might launch an ORPort
19439 reachability check even when DisableNetwork is set. Noticed while
19440 fixing bug 18616; bugfix on 0.2.3.9-alpha.
19442 o Minor bugfixes (statistics):
19443 - We now include consensus downloads via IPv6 in our directory-
19444 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
19446 o Minor bugfixes (testing):
19447 - Allow directories in small networks to bootstrap by skipping
19448 DirPort checks when the consensus has no exits. Fixes bug 19003;
19449 bugfix on 0.2.8.1-alpha. Patch by teor.
19450 - Fix a small memory leak that would occur when the
19451 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
19452 bugfix on 0.2.5.2-alpha.
19454 o Minor bugfixes (time handling):
19455 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
19456 field. Otherwise, our unit tests crash on Windows. Fixes bug
19457 18977; bugfix on 0.2.2.25-alpha.
19460 - Document the contents of the 'datadir/keys' subdirectory in the
19461 manual page. Closes ticket 17621.
19462 - Stop recommending use of nicknames to identify relays in our
19463 MapAddress documentation. Closes ticket 18312.
19466 Changes in version 0.2.8.2-alpha - 2016-03-28
19467 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
19468 bugs in earlier versions of Tor, including some that prevented
19469 authorities using Tor 0.2.7.x from running correctly. IPv6 and
19470 directory support should also be much improved.
19472 o New system requirements:
19473 - Tor no longer supports versions of OpenSSL with a broken
19474 implementation of counter mode. (This bug was present in OpenSSL
19475 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
19476 longer runs with, these versions.
19477 - Tor no longer attempts to support platforms where the "time_t"
19478 type is unsigned. (To the best of our knowledge, only OpenVMS does
19479 this, and Tor has never actually built on OpenVMS.) Closes
19481 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
19482 later (released in 2008 and 2009 respectively). If you are
19483 building Tor from the git repository instead of from the source
19484 distribution, and your tools are older than this, you will need to
19485 upgrade. Closes ticket 17732.
19487 o Major bugfixes (security, pointers):
19488 - Avoid a difficult-to-trigger heap corruption attack when extending
19489 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
19490 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
19491 Reported by Guido Vranken.
19493 o Major bugfixes (bridges, pluggable transports):
19494 - Modify the check for OR connections to private addresses. Allow
19495 bridges on private addresses, including pluggable transports that
19496 ignore the (potentially private) address in the bridge line. Fixes
19497 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
19499 o Major bugfixes (compilation):
19500 - Repair hardened builds under the clang compiler. Previously, our
19501 use of _FORTIFY_SOURCE would conflict with clang's address
19502 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
19504 o Major bugfixes (crash on shutdown):
19505 - Correctly handle detaching circuits from muxes when shutting down.
19506 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
19507 - Fix an assert-on-exit bug related to counting memory usage in
19508 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
19510 o Major bugfixes (crash on startup):
19511 - Fix a segfault during startup: If a Unix domain socket was
19512 configured as listener (such as a ControlSocket or a SocksPort
19513 "unix:" socket), and tor was started as root but not configured to
19514 switch to another user, tor would segfault while trying to string
19515 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
19518 o Major bugfixes (dns proxy mode, crash):
19519 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
19520 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
19522 o Major bugfixes (relays, bridge clients):
19523 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
19524 bridge clients use the address configured in the bridge line.
19525 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
19528 o Major bugfixes (voting):
19529 - Actually enable support for authorities to match routers by their
19530 Ed25519 identities. Previously, the code had been written, but
19531 some debugging code that had accidentally been left in the
19532 codebase made it stay turned off. Fixes bug 17702; bugfix
19534 - When collating votes by Ed25519 identities, authorities now
19535 include a "NoEdConsensus" flag if the ed25519 value (or lack
19536 thereof) for a server does not reflect the majority consensus.
19537 Related to bug 17668; bugfix on 0.2.7.2-alpha.
19538 - When generating a vote with keypinning disabled, never include two
19539 entries for the same ed25519 identity. This bug was causing
19540 authorities to generate votes that they could not parse when a
19541 router violated key pinning by changing its RSA identity but
19542 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
19543 18318. Bugfix on 0.2.7.2-alpha.
19545 o Minor features (security, win32):
19546 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
19547 attack. Fixes bug 18123; bugfix on all tor versions. Patch
19550 o Minor features (bug-resistance):
19551 - Make Tor survive errors involving connections without a
19552 corresponding event object. Previously we'd fail with an
19553 assertion; now we produce a log message. Related to bug 16248.
19555 o Minor features (build):
19556 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
19557 as having possible IPFW support. Closes ticket 18448. Patch from
19558 Steven Chamberlain.
19560 o Minor features (code hardening):
19561 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
19562 level code, to harden against accidental failures to NUL-
19563 terminate. Part of ticket 17852. Patch from jsturgix. Found
19566 o Minor features (crypto):
19567 - Validate the hard-coded Diffie-Hellman parameters and ensure that
19568 p is a safe prime, and g is a suitable generator. Closes
19571 o Minor features (geoip):
19572 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
19575 o Minor features (hidden service directory):
19576 - Streamline relay-side hsdir handling: when relays consider whether
19577 to accept an uploaded hidden service descriptor, they no longer
19578 check whether they are one of the relays in the network that is
19579 "supposed" to handle that descriptor. Implements ticket 18332.
19581 o Minor features (IPv6):
19582 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
19583 to 1, tor prefers IPv6 directory addresses.
19584 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
19585 avoids using IPv4 for client OR and directory connections.
19586 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
19587 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
19588 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
19590 o Minor features (linux seccomp2 sandbox):
19591 - Reject attempts to change our Address with "Sandbox 1" enabled.
19592 Changing Address with Sandbox turned on would never actually work,
19593 but previously it would fail in strange and confusing ways. Found
19594 while fixing 18548.
19596 o Minor features (robustness):
19597 - Exit immediately with an error message if the code attempts to use
19598 Libevent without having initialized it. This should resolve some
19599 frequently-made mistakes in our unit tests. Closes ticket 18241.
19601 o Minor features (unix domain sockets):
19602 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
19603 Unix domain sockets without checking the permissions on the parent
19604 directory. (Tor checks permissions by default because some
19605 operating systems only check permissions on the parent directory.
19606 However, some operating systems do look at permissions on the
19607 socket, and tor's default check is unneeded.) Closes ticket 18458.
19610 o Minor bugfixes (exit policies, security):
19611 - Refresh an exit relay's exit policy when interface addresses
19612 change. Previously, tor only refreshed the exit policy when the
19613 configured external address changed. Fixes bug 18208; bugfix on
19614 0.2.7.3-rc. Patch by teor.
19616 o Minor bugfixes (security, hidden services):
19617 - Prevent hidden services connecting to client-supplied rendezvous
19618 addresses that are reserved as internal or multicast. Fixes bug
19619 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
19621 o Minor bugfixes (build):
19622 - Do not link the unit tests against both the testing and non-
19623 testing versions of the static libraries. Fixes bug 18490; bugfix
19625 - Avoid spurious failures from configure files related to calling
19626 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
19627 0.2.0.1-alpha. Patch from "cypherpunks".
19628 - Silence spurious clang-scan warnings in the ed25519_donna code by
19629 explicitly initializing some objects. Fixes bug 18384; bugfix on
19630 0.2.7.2-alpha. Patch by teor.
19632 o Minor bugfixes (client, bootstrap):
19633 - Count receipt of new microdescriptors as progress towards
19634 bootstrapping. Previously, with EntryNodes set, Tor might not
19635 successfully repopulate the guard set on bootstrapping. Fixes bug
19636 16825; bugfix on 0.2.3.1-alpha.
19638 o Minor bugfixes (code correctness):
19639 - Update to the latest version of Trunnel, which tries harder to
19640 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
19641 by clang address sanitizer. Fixes bug 18373; bugfix
19644 o Minor bugfixes (configuration):
19645 - Fix a tiny memory leak when parsing a port configuration ending in
19646 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
19648 o Minor bugfixes (containers):
19649 - If we somehow attempt to construct a heap with more than
19650 1073741822 elements, avoid an integer overflow when maintaining
19651 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
19653 o Minor bugfixes (correctness):
19654 - Fix a bad memory handling bug that would occur if we had queued a
19655 cell on a channel's incoming queue. Fortunately, we can't actually
19656 queue a cell like that as our code is constructed today, but it's
19657 best to avoid this kind of error, even if there isn't any code
19658 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
19660 o Minor bugfixes (directory):
19661 - When generating a URL for a directory server on an IPv6 address,
19662 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
19663 on 0.2.3.9-alpha. Patch from Malek.
19665 o Minor bugfixes (fallback directory mirrors):
19666 - When requesting extrainfo descriptors from a trusted directory
19667 server, check whether it is an authority or a fallback directory
19668 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
19669 0.2.4.7-alpha. Reported by atagar, patch by teor.
19671 o Minor bugfixes (hidden service, client):
19672 - Handle the case where the user makes several fast consecutive
19673 requests to the same .onion address. Previously, the first six
19674 requests would each trigger a descriptor fetch, each picking a
19675 directory (there are 6 overall) and the seventh one would fail
19676 because no directories were left, thereby triggering a close on
19677 all current directory connections asking for the hidden service.
19678 The solution here is to not close the connections if we have
19679 pending directory fetches. Fixes bug 15937; bugfix
19682 o Minor bugfixes (hidden service, control port):
19683 - Add the onion address to the HS_DESC event for the UPLOADED action
19684 both on success or failure. It was previously hardcoded with
19685 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
19687 o Minor bugfixes (hidden service, directory):
19688 - Bridges now refuse "rendezvous2" (hidden service descriptor)
19689 publish attempts. Suggested by ticket 18332.
19691 o Minor bugfixes (linux seccomp2 sandbox):
19692 - Allow the setrlimit syscall, and the prlimit and prlimit64
19693 syscalls, which some libc implementations use under the hood.
19694 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
19695 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
19696 enabled and no DNS resolvers configured. This should help TAILS
19697 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
19698 - Fix the sandbox's interoperability with unix domain sockets under
19699 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
19701 o Minor bugfixes (logging):
19702 - When logging information about an unparsable networkstatus vote or
19703 consensus, do not say "vote" when we mean consensus. Fixes bug
19704 18368; bugfix on 0.2.0.8-alpha.
19705 - Scrub service name in "unrecognized service ID" log messages.
19706 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
19707 - Downgrade logs and backtraces about IP versions to info-level.
19708 Only log backtraces once each time tor runs. Assists in diagnosing
19709 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
19710 Christian, patch by teor.
19712 o Minor bugfixes (memory safety):
19713 - Avoid freeing an uninitialized pointer when opening a socket fails
19714 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
19715 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
19717 - Correctly duplicate addresses in get_interface_address6_list().
19718 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
19719 patch by "cypherpunks".
19720 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
19722 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
19723 18672; bugfix on 0.2.5.1-alpha.
19725 o Minor bugfixes (private directory):
19726 - Prevent a race condition when creating private directories. Fixes
19727 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
19728 Patch from jsturgix. Found with Flawfinder.
19730 o Minor bugfixes (test networks, IPv6):
19731 - Allow internal IPv6 addresses in descriptors in test networks.
19732 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
19735 o Minor bugfixes (testing):
19736 - We no longer disable assertions in the unit tests when coverage is
19737 enabled. Instead, we require you to say --disable-asserts-in-tests
19738 to the configure script if you need assertions disabled in the
19739 unit tests (for example, if you want to perform branch coverage).
19740 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
19742 o Minor bugfixes (time parsing):
19743 - Avoid overflow in tor_timegm when parsing dates in and after 2038
19744 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
19745 0.0.2pre14. Patch by teor.
19747 o Minor bugfixes (tor-gencert):
19748 - Correctly handle the case where an authority operator enters a
19749 passphrase but sends an EOF before sending a newline. Fixes bug
19750 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
19752 o Code simplification and refactoring:
19753 - Quote all the string interpolations in configure.ac -- even those
19754 which we are pretty sure can't contain spaces. Closes ticket
19755 17744. Patch from zerosion.
19756 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
19757 inplace, so there's no need to have a separate implementation for
19758 the non-inplace code. Closes ticket 18258. Patch from Malek.
19759 - Simplify return types for some crypto functions that can't
19760 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
19763 - Change build messages to refer to "Fedora" instead of "Fedora
19764 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
19765 Patches from "icanhasaccount" and "cypherpunks".
19767 o Removed features:
19768 - We no longer maintain an internal freelist in memarea.c.
19769 Allocators should be good enough to make this code unnecessary,
19770 and it's doubtful that it ever had any performance benefit.
19773 - Fix several warnings from clang's address sanitizer produced in
19775 - Treat backtrace test failures as expected on FreeBSD until we
19776 solve bug 17808. Closes ticket 18204.
19779 Changes in version 0.2.8.1-alpha - 2016-02-04
19780 Tor 0.2.8.1-alpha is the first alpha release in its series. It
19781 includes numerous small features and bugfixes against previous Tor
19782 versions, and numerous small infrastructure improvements. The most
19783 notable features are a set of improvements to the directory subsystem.
19785 o Major features (security, Linux):
19786 - When Tor starts as root on Linux and is told to switch user ID, it
19787 can now retain the capability to bind to low ports. By default,
19788 Tor will do this only when it's switching user ID and some low
19789 ports have been configured. You can change this behavior with the
19790 new option KeepBindCapabilities. Closes ticket 8195.
19792 o Major features (directory system):
19793 - When bootstrapping multiple consensus downloads at a time, use the
19794 first one that starts downloading, and close the rest. This
19795 reduces failures when authorities or fallback directories are slow
19796 or down. Together with the code for feature 15775, this feature
19797 should reduces failures due to fallback churn. Implements ticket
19798 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
19799 "mikeperry" and "teor".
19800 - Include a trial list of 21 default fallback directories, generated
19801 in January 2016, based on an opt-in survey of suitable relays.
19802 Doing this should make clients bootstrap more quickly and reliably,
19803 and reduce the load on the directory authorities. Closes ticket
19804 15775. Patch by "teor".
19805 Candidates identified using an OnionOO script by "weasel", "teor",
19806 "gsathya", and "karsten".
19807 - Previously only relays that explicitly opened a directory port
19808 (DirPort) accepted directory requests from clients. Now all
19809 relays, with and without a DirPort, accept and serve tunneled
19810 directory requests that they receive through their ORPort. You can
19811 disable this behavior using the new DirCache option. Closes
19814 o Major key updates:
19815 - Update the V3 identity key for the dannenberg directory authority:
19816 it was changed on 18 November 2015. Closes task 17906. Patch
19819 o Minor features (security, clock):
19820 - Warn when the system clock appears to move back in time (when the
19821 state file was last written in the future). Tor doesn't know that
19822 consensuses have expired if the clock is in the past. Patch by
19823 "teor". Implements ticket 17188.
19825 o Minor features (security, exit policies):
19826 - ExitPolicyRejectPrivate now rejects more private addresses by
19827 default. Specifically, it now rejects the relay's outbound bind
19828 addresses (if configured), and the relay's configured port
19829 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
19830 0.2.0.11-alpha. Patch by "teor".
19832 o Minor features (security, memory erasure):
19833 - Set the unused entries in a smartlist to NULL. This helped catch
19834 a (harmless) bug, and shouldn't affect performance too much.
19835 Implements ticket 17026.
19836 - Use SecureMemoryWipe() function to securely clean memory on
19837 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
19838 Implements feature 17986.
19839 - Use explicit_bzero or memset_s when present. Previously, we'd use
19840 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
19841 from <logan@hackers.mu> and <selven@hackers.mu>.
19842 - Make memwipe() do nothing when passed a NULL pointer or buffer of
19843 zero size. Check size argument to memwipe() for underflow. Fixes
19844 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
19847 o Minor features (security, RNG):
19848 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
19849 positively are not allowed to fail. Previously we depended on
19850 internal details of OpenSSL's behavior. Closes ticket 17686.
19851 - Never use the system entropy output directly for anything besides
19852 seeding the PRNG. When we want to generate important keys, instead
19853 of using system entropy directly, we now hash it with the PRNG
19854 stream. This may help resist certain attacks based on broken OS
19855 entropy implementations. Closes part of ticket 17694.
19856 - Use modern system calls (like getentropy() or getrandom()) to
19857 generate strong entropy on platforms that have them. Closes
19860 o Minor features (accounting):
19861 - Added two modes to the AccountingRule option: One for limiting
19862 only the number of bytes sent ("AccountingRule out"), and one for
19863 limiting only the number of bytes received ("AccountingRule in").
19864 Closes ticket 15989; patch from "unixninja92".
19866 o Minor features (build):
19867 - Since our build process now uses "make distcheck", we no longer
19868 force "make dist" to depend on "make check". Closes ticket 17893;
19869 patch from "cypherpunks."
19870 - Tor now builds successfully with the recent OpenSSL 1.1
19871 development branch, and with the latest LibreSSL. Closes tickets
19872 17549, 17921, and 17984.
19874 o Minor features (controller):
19875 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
19876 tickets 16774 and 17817. Patch by George Tankersley.
19877 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
19878 service descriptor from a service's local hidden service
19879 descriptor cache. Closes ticket 14846.
19880 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
19881 controllers can examine the the reject rules added by
19882 ExitPolicyRejectPrivate. This makes it easier for stem to display
19885 o Minor features (crypto):
19886 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
19888 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
19889 - When allocating a digest state object, allocate no more space than
19890 we actually need. Previously, we would allocate as much space as
19891 the state for the largest algorithm would need. This change saves
19892 up to 672 bytes per circuit. Closes ticket 17796.
19893 - Improve performance when hashing non-multiple of 8 sized buffers,
19894 based on Andrew Moon's public domain SipHash-2-4 implementation.
19895 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
19897 o Minor features (directory downloads):
19898 - Wait for busy authorities and fallback directories to become non-
19899 busy when bootstrapping. (A similar change was made in 6c443e987d
19900 for directory caches chosen from the consensus.) Closes ticket
19901 17864; patch by "teor".
19902 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
19903 directory mirrors. The default is 1; set it to 0 to disable
19904 fallbacks. Implements ticket 17576. Patch by "teor".
19906 o Minor features (geoip):
19907 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
19910 o Minor features (IPv6):
19911 - Add an argument 'ipv6=address:orport' to the DirAuthority and
19912 FallbackDir torrc options, to specify an IPv6 address for an
19913 authority or fallback directory. Add hard-coded ipv6 addresses for
19914 directory authorities that have them. Closes ticket 17327; patch
19915 from Nick Mathewson and "teor".
19916 - Add address policy assume_action support for IPv6 addresses.
19917 - Limit IPv6 mask bits to 128.
19918 - Warn when comparing against an AF_UNSPEC address in a policy, it's
19919 almost always a bug. Closes ticket 17863; patch by "teor".
19920 - Allow users to configure directory authorities and fallback
19921 directory servers with IPv6 addresses and ORPorts. Resolves
19923 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
19924 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
19925 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
19926 17638; bugfix on 0.0.2pre8. Patch by "teor".
19928 o Minor features (logging):
19929 - When logging to syslog, allow a tag to be added to the syslog
19930 identity (the string prepended to every log message). The tag can
19931 be configured with SyslogIdentityTag and defaults to none. Setting
19932 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
19935 o Minor features (portability):
19936 - Use timingsafe_memcmp() where available. Closes ticket 17944;
19937 patch from <logan@hackers.mu>.
19939 o Minor features (relay, address discovery):
19940 - Add a family argument to get_interface_addresses_raw() and
19941 subfunctions to make network interface address interogation more
19942 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
19943 types of interfaces from the operating system. Resolves
19945 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
19946 fails to enumerate interface addresses using the platform-specific
19947 API, have it rely on the UDP socket fallback technique to try and
19948 find out what IP addresses (both IPv4 and IPv6) our machine has.
19949 Resolves ticket 17951.
19951 o Minor features (replay cache):
19952 - The replay cache now uses SHA256 instead of SHA1. Implements
19953 feature 8961. Patch by "teor", issue reported by "rransom".
19955 o Minor features (unix file permissions):
19956 - Defer creation of Unix sockets until after setuid. This avoids
19957 needing CAP_CHOWN and CAP_FOWNER when using systemd's
19958 CapabilityBoundingSet, or chown and fowner when using SELinux.
19959 Implements part of ticket 17562. Patch from Jamie Nguyen.
19960 - If any directory created by Tor is marked as group readable, the
19961 filesystem group is allowed to be either the default GID or the
19962 root user. Allowing root to read the DataDirectory prevents the
19963 need for CAP_READ_SEARCH when using systemd's
19964 CapabilityBoundingSet, or dac_read_search when using SELinux.
19965 Implements part of ticket 17562. Patch from Jamie Nguyen.
19966 - Introduce a new DataDirectoryGroupReadable option. If it is set to
19967 1, the DataDirectory will be made readable by the default GID.
19968 Implements part of ticket 17562. Patch from Jamie Nguyen.
19970 o Minor bugfixes (accounting):
19971 - The max bandwidth when using 'AccountRule sum' is now correctly
19972 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
19973 from "unixninja92".
19975 o Minor bugfixes (code correctness):
19976 - When closing an entry connection, generate a warning if we should
19977 have sent an end cell for it but we haven't. Fixes bug 17876;
19978 bugfix on 0.2.3.2-alpha.
19979 - Assert that allocated memory held by the reputation code is freed
19980 according to its internal counters. Fixes bug 17753; bugfix
19982 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
19985 o Minor bugfixes (compilation):
19986 - Mark all object files that include micro-revision.i as depending
19987 on it, so as to make parallel builds more reliable. Fixes bug
19988 17826; bugfix on 0.2.5.1-alpha.
19989 - Don't try to use the pthread_condattr_setclock() function unless
19990 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
19991 17819; bugfix on 0.2.6.3-alpha.
19992 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
19994 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19995 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19996 - Fix search for libevent libraries on OpenBSD (and other systems
19997 that install libevent 1 and libevent 2 in parallel). Fixes bug
19998 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
19999 - Isolate environment variables meant for tests from the rest of the
20000 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
20001 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
20003 - Remove config.log only from make distclean, not from make clean.
20004 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
20006 o Minor bugfixes (crypto):
20007 - Check the return value of HMAC() and assert on failure. Fixes bug
20008 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
20010 o Minor bugfixes (fallback directories):
20011 - Mark fallbacks as "too busy" when they return a 503 response,
20012 rather than just marking authorities. Fixes bug 17572; bugfix on
20013 0.2.4.7-alpha. Patch by "teor".
20015 o Minor bugfixes (IPv6):
20016 - Update the limits in max_dl_per_request for IPv6 address length.
20017 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
20019 o Minor bugfixes (linux seccomp2 sandbox):
20020 - Fix a crash when using offline master ed25519 keys with the Linux
20021 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
20023 o Minor bugfixes (logging):
20024 - In log messages that include a function name, use __FUNCTION__
20025 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
20026 with clang __PRETTY_FUNCTION__ has extra information we don't
20027 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
20029 - Remove needless quotes from a log message about unparseable
20030 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
20032 o Minor bugfixes (portability):
20033 - Remove an #endif from configure.ac so that we correctly detect the
20034 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
20037 o Minor bugfixes (relays):
20038 - Check that both the ORPort and DirPort (if present) are reachable
20039 before publishing a relay descriptor. Otherwise, relays publish a
20040 descriptor with DirPort 0 when the DirPort reachability test takes
20041 longer than the ORPort reachability test. Fixes bug 18050; bugfix
20042 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
20044 o Minor bugfixes (relays, hidden services):
20045 - Refuse connection requests to private OR addresses unless
20046 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
20047 then refuse to send any cells to a private address. Fixes bugs
20048 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
20050 o Minor bugfixes (safe logging):
20051 - When logging a malformed hostname received through socks4, scrub
20052 it if SafeLogging says we should. Fixes bug 17419; bugfix
20055 o Minor bugfixes (statistics code):
20056 - Consistently check for overflow in round_*_to_next_multiple_of
20057 functions, and add unit tests with additional and maximal values.
20058 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
20059 - Handle edge cases in the laplace functions: avoid division by
20060 zero, avoid taking the log of zero, and silence clang type
20061 conversion warnings using round and trunc. Add unit tests for edge
20062 cases with maximal values. Fixes part of bug 13192; bugfix
20065 o Minor bugfixes (testing):
20066 - The test for log_heartbeat was incorrectly failing in timezones
20067 with non-integer offsets. Instead of comparing the end of the time
20068 string against a constant, compare it to the output of
20069 format_local_iso_time when given the correct input. Fixes bug
20070 18039; bugfix on 0.2.5.4-alpha.
20071 - Make unit tests pass on IPv6-only systems, and systems without
20072 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
20073 bugfix on 0.2.7.3-rc. Patch by "teor".
20074 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
20076 - Check the full results of SHA256 and SHA512 digests in the unit
20077 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
20079 o Code simplification and refactoring:
20080 - Move logging of redundant policy entries in
20081 policies_parse_exit_policy_internal into its own function. Closes
20082 ticket 17608; patch from "juce".
20083 - Extract the more complicated parts of circuit_mark_for_close()
20084 into a new function that we run periodically before circuits are
20085 freed. This change removes more than half of the functions
20086 currently in the "blob". Closes ticket 17218.
20087 - Clean up a little duplicated code in
20088 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
20090 - Decouple the list of streams waiting to be attached to circuits
20091 from the overall connection list. This change makes it possible to
20092 attach streams quickly while simplifying Tor's callgraph and
20093 avoiding O(N) scans of the entire connection list. Closes
20095 - When a direct directory request fails immediately on launch,
20096 instead of relaunching that request from inside the code that
20097 launches it, instead mark the connection for teardown. This change
20098 simplifies Tor's callback and prevents the directory-request
20099 launching code from invoking itself recursively. Closes
20101 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
20102 use them. Closes ticket 17926.
20105 - Add a description of the correct use of the '--keygen' command-
20106 line option. Closes ticket 17583; based on text by 's7r'.
20107 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
20108 - Explain actual minima for BandwidthRate. Closes ticket 16382.
20109 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
20110 - Mention torspec URL in the manpage and point the reader to it
20111 whenever we mention a document that belongs in torspce. Fixes
20114 o Removed features:
20115 - Remove client-side support for connecting to Tor relays running
20116 versions of Tor before 0.2.3.6-alpha. These relays didn't support
20117 the v3 TLS handshake protocol, and are no longer allowed on the
20118 Tor network. Implements the client side of ticket 11150. Based on
20119 patches by Tom van der Woerdt.
20122 - Add unit tests to check for common RNG failure modes, such as
20123 returning all zeroes, identical values, or incrementing values
20124 (OpenSSL's rand_predictable feature). Patch by "teor".
20125 - Log more information when the backtrace tests fail. Closes ticket
20126 17892. Patch from "cypherpunks."
20127 - Always test both ed25519 backends, so that we can be sure that our
20128 batch-open replacement code works. Part of ticket 16794.
20129 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
20130 portion of ticket 16831.
20131 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
20132 util_format.c, directory.c, and options_validate.c. Closes tickets
20133 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
20135 - Unit tests for directory_handle_command_get. Closes ticket 17004.
20136 Patch from Reinaldo de Souza Jr.
20139 Changes in version 0.2.7.6 - 2015-12-10
20140 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
20141 well as a minor bug in hidden service reliability.
20143 o Major bugfixes (guard selection):
20144 - Actually look at the Guard flag when selecting a new directory
20145 guard. When we implemented the directory guard design, we
20146 accidentally started treating all relays as if they have the Guard
20147 flag during guard selection, leading to weaker anonymity and worse
20148 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
20151 o Minor features (geoip):
20152 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
20155 o Minor bugfixes (compilation):
20156 - When checking for net/pfvar.h, include netinet/in.h if possible.
20157 This fixes transparent proxy detection on OpenBSD. Fixes bug
20158 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
20159 - Fix a compilation warning with Clang 3.6: Do not check the
20160 presence of an address which can never be NULL. Fixes bug 17781.
20162 o Minor bugfixes (correctness):
20163 - When displaying an IPv6 exit policy, include the mask bits
20164 correctly even when the number is greater than 31. Fixes bug
20165 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
20166 - The wrong list was used when looking up expired intro points in a
20167 rend service object, causing what we think could be reachability
20168 issues for hidden services, and triggering a BUG log. Fixes bug
20169 16702; bugfix on 0.2.7.2-alpha.
20170 - Fix undefined behavior in the tor_cert_checksig function. Fixes
20171 bug 17722; bugfix on 0.2.7.2-alpha.
20174 Changes in version 0.2.7.5 - 2015-11-20
20175 The Tor 0.2.7 release series is dedicated to the memory of Tor user
20176 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
20177 tirelessly to advocate human rights regardless of national borders,
20178 and oppose the encroachments of mass surveillance. He opposed national
20179 exceptionalism, he brought clarity to legal and policy debates, he
20180 understood and predicted the impact of mass surveillance on the world,
20181 and he laid the groundwork for resisting it. While serving on the Tor
20182 Project's board of directors, he brought us his uncompromising focus
20183 on technical excellence in the service of humankind. Caspar was an
20184 inimitable force for good and a wonderful friend. He was kind,
20185 humorous, generous, gallant, and believed we should protect one
20186 another without exception. We honor him here for his ideals, his
20187 efforts, and his accomplishments. Please honor his memory with works
20188 that would make him proud.
20190 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
20192 The 0.2.7 series adds a more secure identity key type for relays,
20193 improves cryptography performance, resolves several longstanding
20194 hidden-service performance issues, improves controller support for
20195 hidden services, and includes small bugfixes and performance
20196 improvements throughout the program. This release series also includes
20197 more tests than before, and significant simplifications to which parts
20198 of Tor invoke which others.
20200 (This release contains no code changes since 0.2.7.4-rc.)
20203 Changes in version 0.2.7.4-rc - 2015-10-21
20204 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
20205 fixes some important memory leaks, and a scary-looking (but mostly
20206 harmless in practice) invalid-read bug. It also has a few small
20207 bugfixes, notably fixes for compilation and portability on different
20208 platforms. If no further significant bounds are found, the next
20209 release will the the official stable release.
20211 o Major bugfixes (security, correctness):
20212 - Fix an error that could cause us to read 4 bytes before the
20213 beginning of an openssl string. This bug could be used to cause
20214 Tor to crash on systems with unusual malloc implementations, or
20215 systems with unusual hardening installed. Fixes bug 17404; bugfix
20218 o Major bugfixes (correctness):
20219 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
20220 bug 17401; bugfix on 0.2.7.3-rc.
20222 o Major bugfixes (memory leaks):
20223 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
20224 17398; bugfix on 0.2.6.1-alpha.
20225 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
20226 17402; bugfix on 0.2.7.3-rc.
20227 - Fix a memory leak when reading an expired signing key from disk.
20228 Fixes bug 17403; bugfix on 0.2.7.2-rc.
20230 o Minor features (geoIP):
20231 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
20234 o Minor bugfixes (compilation):
20235 - Repair compilation with the most recent (unreleased, alpha)
20236 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
20237 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
20238 17251; bugfix on 0.2.7.2-alpha.
20239 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
20240 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
20242 o Minor bugfixes (portability):
20243 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
20244 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
20247 o Minor bugfixes (sandbox):
20248 - Add the "hidserv-stats" filename to our sandbox filter for the
20249 HiddenServiceStatistics option to work properly. Fixes bug 17354;
20250 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
20252 o Minor bugfixes (testing):
20253 - Add unit tests for get_interface_address* failure cases. Fixes bug
20254 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
20255 - Fix breakage when running 'make check' with BSD make. Fixes bug
20256 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
20257 - Make the get_ifaddrs_* unit tests more tolerant of different
20258 network configurations. (Don't assume every test box has an IPv4
20259 address, and don't assume every test box has a non-localhost
20260 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
20261 - Skip backtrace tests when backtrace support is not compiled in.
20262 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
20266 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
20267 - Note that HiddenServicePorts can take a unix domain socket. Closes
20271 Changes in version 0.2.7.3-rc - 2015-09-25
20272 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
20273 contains numerous usability fixes for Ed25519 keys, safeguards against
20274 several misconfiguration problems, significant simplifications to
20275 Tor's callgraph, and numerous bugfixes and small features.
20277 This is the most tested release of Tor to date. The unit tests cover
20278 39.40% of the code, and the integration tests (accessible with "make
20279 test-full-online", requiring stem and chutney and a network
20280 connection) raise the coverage to 64.49%.
20282 o Major features (security, hidden services):
20283 - Hidden services, if using the EntryNodes option, are required to
20284 use more than one EntryNode, in order to avoid a guard discovery
20285 attack. (This would only affect people who had configured hidden
20286 services and manually specified the EntryNodes option with a
20287 single entry-node. The impact was that it would be easy to
20288 remotely identify the guard node used by such a hidden service.
20289 See ticket for more information.) Fixes ticket 14917.
20291 o Major features (Ed25519 keys, keypinning):
20292 - The key-pinning option on directory authorities is now advisory-
20293 only by default. In a future version, or when the AuthDirPinKeys
20294 option is set, pins are enforced again. Disabling key-pinning
20295 seemed like a good idea so that we can survive the fallout of any
20296 usability problems associated with Ed25519 keys. Closes
20299 o Major features (Ed25519 performance):
20300 - Improve the speed of Ed25519 operations and Curve25519 keypair
20301 generation when built targeting 32 bit x86 platforms with SSE2
20302 available. Implements ticket 16535.
20303 - Improve the runtime speed of Ed25519 signature verification by
20304 using Ed25519-donna's batch verification support. Implements
20307 o Major features (performance testing):
20308 - The test-network.sh script now supports performance testing.
20309 Requires corresponding chutney performance testing changes. Patch
20310 by "teor". Closes ticket 14175.
20312 o Major features (relay, Ed25519):
20313 - Significant usability improvements for Ed25519 key management. Log
20314 messages are better, and the code can recover from far more
20315 failure conditions. Thanks to "s7r" for reporting and diagnosing
20317 - Add a new OfflineMasterKey option to tell Tor never to try loading
20318 or generating a secret Ed25519 identity key. You can use this in
20319 combination with tor --keygen to manage offline and/or encrypted
20320 Ed25519 keys. Implements ticket 16944.
20321 - Add a --newpass option to allow changing or removing the
20322 passphrase of an encrypted key with tor --keygen. Implements part
20324 - On receiving a HUP signal, check to see whether the Ed25519
20325 signing key has changed, and reload it if so. Closes ticket 16790.
20327 o Major bugfixes (relay, Ed25519):
20328 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
20329 0.2.7.2-alpha. Reported by "s7r".
20330 - Improve handling of expired signing keys with offline master keys.
20331 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
20333 o Minor features (client-side privacy):
20334 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
20335 lifespan when IsolateSOCKSAuth and streams with SOCKS
20336 authentication are attached to the circuit. This allows
20337 applications like TorBrowser to manage circuit lifetime on their
20338 own. Implements feature 15482.
20339 - When logging malformed hostnames from SOCKS5 requests, respect
20340 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
20342 o Minor features (compilation):
20343 - Give a warning as early as possible when trying to build with an
20344 unsupported OpenSSL version. Closes ticket 16901.
20345 - Fail during configure if we're trying to build against an OpenSSL
20346 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
20347 which started requiring ECC.
20349 o Minor features (geoip):
20350 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
20353 o Minor features (hidden services):
20354 - Relays need to have the Fast flag to get the HSDir flag. As this
20355 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
20356 drop. This change should make some attacks against the hidden
20357 service directory system harder. Fixes ticket 15963.
20358 - Turn on hidden service statistics collection by setting the torrc
20359 option HiddenServiceStatistics to "1" by default. (This keeps
20360 track only of the fraction of traffic used by hidden services, and
20361 the total number of hidden services in existence.) Closes
20363 - Client now uses an introduction point failure cache to know when
20364 to fetch or keep a descriptor in their cache. Previously, failures
20365 were recorded implicitly, but not explicitly remembered. Closes
20368 o Minor features (testing, authorities, documentation):
20369 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
20370 explicitly manage consensus flags in testing networks. Patch by
20371 "robgjansen", modified by "teor". Implements part of ticket 14882.
20373 o Minor bugfixes (security, exit policies):
20374 - ExitPolicyRejectPrivate now also rejects the relay's published
20375 IPv6 address (if any), and any publicly routable IPv4 or IPv6
20376 addresses on any local interfaces. ticket 17027. Patch by "teor".
20377 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
20379 o Minor bug fixes (torrc exit policies):
20380 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
20381 produce IPv6 wildcard addresses. Previously they would produce
20382 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
20383 of bug 16069; bugfix on 0.2.4.7-alpha.
20384 - When parsing torrc ExitPolicies, we now warn for a number of cases
20385 where the user's intent is likely to differ from Tor's actual
20386 behavior. These include: using an IPv4 address with an accept6 or
20387 reject6 line; using "private" on an accept6 or reject6 line; and
20388 including any ExitPolicy lines after accept *:* or reject *:*.
20389 Related to ticket 16069.
20390 - When parsing torrc ExitPolicies, we now issue an info-level
20391 message when expanding an "accept/reject *" line to include both
20392 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
20393 - In each instance above, usage advice is provided to avoid the
20394 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
20395 16069; bugfix on 0.2.4.7-alpha.
20397 o Minor bugfixes (authority):
20398 - Don't assign "HSDir" to a router if it isn't Valid and Running.
20399 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
20400 - Downgrade log messages about Ed25519 key issues if they are in old
20401 cached router descriptors. Fixes part of bug 16286; bugfix
20403 - When we find an Ed25519 key issue in a cached descriptor, stop
20404 saying the descriptor was just "uploaded". Fixes another part of
20405 bug 16286; bugfix on 0.2.7.2-alpha.
20407 o Minor bugfixes (control port):
20408 - Repair a warning and a spurious result when getting the maximum
20409 number of file descriptors from the controller. Fixes bug 16697;
20410 bugfix on 0.2.7.2-alpha.
20412 o Minor bugfixes (correctness):
20413 - When calling channel_free_list(), avoid calling smartlist_remove()
20414 while inside a FOREACH loop. This partially reverts commit
20415 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
20416 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
20418 o Minor bugfixes (documentation):
20419 - Advise users on how to configure separate IPv4 and IPv6 exit
20420 policies in the manpage and sample torrcs. Related to ticket 16069.
20421 - Fix the usage message of tor-resolve(1) so that it no longer lists
20422 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
20423 - Fix an error in the manual page and comments for
20424 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
20425 required "ORPort connectivity". While this is true, it is in no
20426 way unique to the HSDir flag. Of all the flags, only HSDirs need a
20427 DirPort configured in order for the authorities to assign that
20428 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
20431 o Minor bugfixes (Ed25519):
20432 - Fix a memory leak when reading router descriptors with expired
20433 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
20435 o Minor bugfixes (linux seccomp2 sandbox):
20436 - Allow bridge authorities to run correctly under the seccomp2
20437 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
20438 - Allow routers with ed25519 keys to run correctly under the
20439 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
20441 o Minor bugfixes (open file limit):
20442 - Fix set_max_file_descriptors() to set by default the max open file
20443 limit to the current limit when setrlimit() fails. Fixes bug
20444 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
20446 o Minor bugfixes (portability):
20447 - Try harder to normalize the exit status of the Tor process to the
20448 standard-provided range. Fixes bug 16975; bugfix on every version
20450 - Check correctly for Windows socket errors in the workqueue
20451 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
20452 - Fix the behavior of crypto_rand_time_range() when told to consider
20453 times before 1970. (These times were possible when running in a
20454 simulated network environment where time()'s output starts at
20455 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
20456 - Restore correct operation of TLS client-cipher detection on
20457 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
20459 o Minor bugfixes (relay):
20460 - Ensure that worker threads actually exit when a fatal error or
20461 shutdown is indicated. This fix doesn't currently affect the
20462 behavior of Tor, because Tor workers never indicates fatal error
20463 or shutdown except in the unit tests. Fixes bug 16868; bugfix
20465 - Unblock threads before releasing the work queue mutex to ensure
20466 predictable scheduling behavior. Fixes bug 16644; bugfix
20469 o Code simplification and refactoring:
20470 - Change the function that's called when we need to retry all
20471 downloads so that it only reschedules the downloads to happen
20472 immediately, rather than launching them all at once itself. This
20473 further simplifies Tor's callgraph.
20474 - Move some format-parsing functions out of crypto.c and
20475 crypto_curve25519.c into crypto_format.c and/or util_format.c.
20476 - Move the client-only parts of init_keys() into a separate
20477 function. Closes ticket 16763.
20478 - Simplify the microdesc_free() implementation so that it no longer
20479 appears (to code analysis tools) to potentially invoke a huge
20480 suite of other microdesc functions.
20481 - Simply the control graph further by deferring the inner body of
20482 directory_all_unreachable() into a callback. Closes ticket 16762.
20483 - Treat the loss of an owning controller as equivalent to a SIGTERM
20484 signal. This removes a tiny amount of duplicated code, and
20485 simplifies our callgraph. Closes ticket 16788.
20486 - When generating an event to send to the controller, we no longer
20487 put the event over the network immediately. Instead, we queue
20488 these events, and use a Libevent callback to deliver them. This
20489 change simplifies Tor's callgraph by reducing the number of
20490 functions from which all other Tor functions are reachable. Closes
20492 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
20493 that try to scan or compile every file on Unix won't decide that
20495 - Remove the unused "nulterminate" argument from buf_pullup().
20498 - Recommend a 40 GB example AccountingMax in torrc.sample rather
20499 than a 4 GB max. Closes ticket 16742.
20500 - Include the TUNING document in our source tarball. It is referred
20501 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
20505 - The internal pure-C tor-fw-helper tool is now removed from the Tor
20506 distribution, in favor of the pure-Go clone available from
20507 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
20508 used by the C tor-fw-helper are not, in our opinion, very
20509 confidence- inspiring in their secure-programming techniques.
20510 Closes ticket 13338.
20511 - Remove the code that would try to aggressively flush controller
20512 connections while writing to them. This code was introduced in
20513 0.1.2.7-alpha, in order to keep output buffers from exceeding
20514 their limits. But there is no longer a maximum output buffer size,
20515 and flushing data in this way caused some undesirable recursions
20516 in our call graph. Closes ticket 16480.
20519 - Make "bridges+hs" the default test network. This tests almost all
20520 tor functionality during make test-network, while allowing tests
20521 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
20522 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
20523 (chutney). Patches by "teor".
20524 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
20525 by-side in the same parent directory. Closes ticket 16903. Patch
20527 - Use environment variables rather than autoconf substitutions to
20528 send variables from the build system to the test scripts. This
20529 change should be easier to maintain, and cause 'make distcheck' to
20530 work better than before. Fixes bug 17148.
20531 - Add a new set of callgraph analysis scripts that use clang to
20532 produce a list of which Tor functions are reachable from which
20533 other Tor functions. We're planning to use these to help simplify
20534 our code structure by identifying illogical dependencies.
20535 - Add new 'test-full' and 'test-full-online' targets to run all
20536 tests, including integration tests with stem and chutney.
20537 - Make the test-workqueue test work on Windows by initializing the
20538 network before we begin.
20539 - New make target (make test-network-all) to run multiple applicable
20540 chutney test cases. Patch from Teor; closes 16953.
20541 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
20542 functions in dns.c. Implements a portion of ticket 16831.
20543 - When building Tor with testing coverage enabled, run Chutney tests
20544 (if any) using the 'tor-cov' coverage binary.
20545 - When running test-network or test-stem, check for the absence of
20546 stem/chutney before doing any build operations.
20549 Changes in version 0.2.7.2-alpha - 2015-07-27
20550 This, the second alpha in the Tor 0.2.7 series, has a number of new
20551 features, including a way to manually pick the number of introduction
20552 points for hidden services, and the much stronger Ed25519 signing key
20553 algorithm for regular Tor relays (including support for encrypted
20554 offline identity keys in the new algorithm).
20556 Support for Ed25519 on relays is currently limited to signing router
20557 descriptors; later alphas in this series will extend Ed25519 key
20558 support to more parts of the Tor protocol.
20560 o Major features (Ed25519 identity keys, Proposal 220):
20561 - All relays now maintain a stronger identity key, using the Ed25519
20562 elliptic curve signature format. This master key is designed so
20563 that it can be kept offline. Relays also generate an online
20564 signing key, and a set of other Ed25519 keys and certificates.
20565 These are all automatically regenerated and rotated as needed.
20566 Implements part of ticket 12498.
20567 - Directory authorities now vote on Ed25519 identity keys along with
20568 RSA1024 keys. Implements part of ticket 12498.
20569 - Directory authorities track which Ed25519 identity keys have been
20570 used with which RSA1024 identity keys, and do not allow them to
20571 vary freely. Implements part of ticket 12498.
20572 - Microdescriptors now include Ed25519 identity keys. Implements
20573 part of ticket 12498.
20574 - Add support for offline encrypted Ed25519 master keys. To use this
20575 feature on your tor relay, run "tor --keygen" to make a new master
20576 key (or to make a new signing key if you already have a master
20577 key). Closes ticket 13642.
20579 o Major features (Hidden services):
20580 - Add the torrc option HiddenServiceNumIntroductionPoints, to
20581 specify a fixed number of introduction points. Its maximum value
20582 is 10 and default is 3. Using this option can increase a hidden
20583 service's reliability under load, at the cost of making it more
20584 visible that the hidden service is facing extra load. Closes
20586 - Remove the adaptive algorithm for choosing the number of
20587 introduction points, which used to change the number of
20588 introduction points (poorly) depending on the number of
20589 connections the HS sees. Closes ticket 4862.
20591 o Major features (onion key cross-certification):
20592 - Relay descriptors now include signatures of their own identity
20593 keys, made using the TAP and ntor onion keys. These signatures
20594 allow relays to prove ownership of their own onion keys. Because
20595 of this change, microdescriptors will no longer need to include
20596 RSA identity keys. Implements proposal 228; closes ticket 12499.
20598 o Major features (performance):
20599 - Improve the runtime speed of Ed25519 operations by using the
20600 public-domain Ed25519-donna by Andrew M. ("floodyberry").
20601 Implements ticket 16467.
20602 - Improve the runtime speed of the ntor handshake by using an
20603 optimized curve25519 basepoint scalarmult implementation from the
20604 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
20605 ideas by Adam Langley. Implements ticket 9663.
20607 o Major bugfixes (client-side privacy, also in 0.2.6.9):
20608 - Properly separate out each SOCKSPort when applying stream
20609 isolation. The error occurred because each port's session group
20610 was being overwritten by a default value when the listener
20611 connection was initialized. Fixes bug 16247; bugfix on
20612 0.2.6.3-alpha. Patch by "jojelino".
20614 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
20615 - Stop refusing to store updated hidden service descriptors on a
20616 client. This reverts commit 9407040c59218 (which indeed fixed bug
20617 14219, but introduced a major hidden service reachability
20618 regression detailed in bug 16381). This is a temporary fix since
20619 we can live with the minor issue in bug 14219 (it just results in
20620 some load on the network) but the regression of 16381 is too much
20621 of a setback. First-round fix for bug 16381; bugfix
20624 o Major bugfixes (hidden services):
20625 - When cannibalizing a circuit for an introduction point, always
20626 extend to the chosen exit node (creating a 4 hop circuit).
20627 Previously Tor would use the current circuit exit node, which
20628 changed the original choice of introduction point, and could cause
20629 the hidden service to skip excluded introduction points or
20630 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
20633 o Major bugfixes (open file limit):
20634 - The open file limit wasn't checked before calling
20635 tor_accept_socket_nonblocking(), which would make Tor exceed the
20636 limit. Now, before opening a new socket, Tor validates the open
20637 file limit just before, and if the max has been reached, return an
20638 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
20640 o Major bugfixes (stability, also in 0.2.6.10):
20641 - Stop crashing with an assertion failure when parsing certain kinds
20642 of malformed or truncated microdescriptors. Fixes bug 16400;
20643 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20644 by "cypherpunks_backup".
20645 - Stop random client-side assertion failures that could occur when
20646 connecting to a busy hidden service, or connecting to a hidden
20647 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20650 o Minor features (directory authorities, security, also in 0.2.6.9):
20651 - The HSDir flag given by authorities now requires the Stable flag.
20652 For the current network, this results in going from 2887 to 2806
20653 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20654 attack by raising the effort for a relay to become Stable to
20655 require at the very least 7 days, while maintaining the 96 hours
20656 uptime requirement for HSDir. Implements ticket 8243.
20658 o Minor features (client):
20659 - Relax the validation of hostnames in SOCKS5 requests, allowing the
20660 character '_' to appear, in order to cope with domains observed in
20661 the wild that are serving non-RFC compliant records. Resolves
20663 - Relax the validation done to hostnames in SOCKS5 requests, and
20664 allow a single trailing '.' to cope with clients that pass FQDNs
20665 using that syntax to explicitly indicate that the domain name is
20666 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
20667 - Add GroupWritable and WorldWritable options to unix-socket based
20668 SocksPort and ControlPort options. These options apply to a single
20669 socket, and override {Control,Socks}SocketsGroupWritable. Closes
20672 o Minor features (control protocol):
20673 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
20674 the control protocol. Resolves ticket 15358.
20676 o Minor features (directory authorities):
20677 - Directory authorities no longer vote against the "Fast", "Stable",
20678 and "HSDir" flags just because they were going to vote against
20679 "Running": if the consensus turns out to be that the router was
20680 running, then the authority's vote should count. Patch from Peter
20681 Retzlaff; closes issue 8712.
20683 o Minor features (geoip, also in 0.2.6.10):
20684 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20685 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20687 o Minor features (hidden services):
20688 - Add the new options "HiddenServiceMaxStreams" and
20689 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
20690 limit the maximum number of simultaneous streams per circuit, and
20691 optionally tear down the circuit when the limit is exceeded. Part
20694 o Minor features (portability):
20695 - Use C99 variadic macros when the compiler is not GCC. This avoids
20696 failing compilations on MSVC, and fixes a log-file-based race
20697 condition in our old workarounds. Original patch from Gisle Vanem.
20699 o Minor bugfixes (compilation, also in 0.2.6.9):
20700 - Build with --enable-systemd correctly when libsystemd is
20701 installed, but systemd is not. Fixes bug 16164; bugfix on
20702 0.2.6.3-alpha. Patch from Peter Palfrader.
20704 o Minor bugfixes (controller):
20705 - Add the descriptor ID in each HS_DESC control event. It was
20706 missing, but specified in control-spec.txt. Fixes bug 15881;
20707 bugfix on 0.2.5.2-alpha.
20709 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
20710 - Check for failures from crypto_early_init, and refuse to continue.
20711 A previous typo meant that we could keep going with an
20712 uninitialized crypto library, and would have OpenSSL initialize
20713 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20714 when implementing ticket 4900. Patch by "teor".
20716 o Minor bugfixes (hidden services):
20717 - Fix a crash when reloading configuration while at least one
20718 configured and one ephemeral hidden service exists. Fixes bug
20719 16060; bugfix on 0.2.7.1-alpha.
20720 - Avoid crashing with a double-free bug when we create an ephemeral
20721 hidden service but adding it fails for some reason. Fixes bug
20722 16228; bugfix on 0.2.7.1-alpha.
20724 o Minor bugfixes (Linux seccomp2 sandbox):
20725 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
20726 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
20728 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
20729 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20730 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20731 on 0.2.6.3-alpha. Patch from "teor".
20733 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
20734 - Fix sandboxing to work when running as a relay, by allowing the
20735 renaming of secret_id_key, and allowing the eventfd2 and futex
20736 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
20738 - Allow systemd connections to work with the Linux seccomp2 sandbox
20739 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20742 o Minor bugfixes (relay):
20743 - Fix a rarely-encountered memory leak when failing to initialize
20744 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
20745 from "cypherpunks".
20747 o Minor bugfixes (systemd):
20748 - Fix an accidental formatting error that broke the systemd
20749 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
20750 - Tor's systemd unit file no longer contains extraneous spaces.
20751 These spaces would sometimes confuse tools like deb-systemd-
20752 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
20754 o Minor bugfixes (tests):
20755 - Use the configured Python executable when running test-stem-full.
20756 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
20758 o Minor bugfixes (tests, also in 0.2.6.9):
20759 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20760 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20762 o Minor bugfixes (threads, comments):
20763 - Always initialize return value in compute_desc_id in rendcommon.c
20764 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20765 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
20766 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20767 - Remove undefined directive-in-macro in test_util_writepid clang
20768 3.7 complains that using a preprocessor directive inside a macro
20769 invocation in test_util_writepid in test_util.c is undefined.
20770 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20772 o Code simplification and refactoring:
20773 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
20774 to ensure they remain consistent and visible everywhere.
20775 - Remove some vestigial workarounds for the MSVC6 compiler. We
20776 haven't supported that in ages.
20777 - The link authentication code has been refactored for better
20778 testability and reliability. It now uses code generated with the
20779 "trunnel" binary encoding generator, to reduce the risk of bugs
20780 due to programmer error. Done as part of ticket 12498.
20783 - Include a specific and (hopefully) accurate documentation of the
20784 torrc file's meta-format in doc/torrc_format.txt. This is mainly
20785 of interest to people writing programs to parse or generate torrc
20786 files. This document is not a commitment to long-term
20787 compatibility; some aspects of the current format are a bit
20788 ridiculous. Closes ticket 2325.
20790 o Removed features:
20791 - Tor no longer supports copies of OpenSSL that are missing support
20792 for Elliptic Curve Cryptography. (We began using ECC when
20793 available in 0.2.4.8-alpha, for more safe and efficient key
20794 negotiation.) In particular, support for at least one of P256 or
20795 P224 is now required, with manual configuration needed if only
20796 P224 is available. Resolves ticket 16140.
20797 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
20798 on an operating system that has not upgraded to OpenSSL 1.0 or
20799 later, and you compile Tor from source, you will need to install a
20800 more recent OpenSSL to link Tor against.) These versions of
20801 OpenSSL are still supported by the OpenSSL, but the numerous
20802 cryptographic improvements in later OpenSSL releases makes them a
20803 clear choice. Resolves ticket 16034.
20804 - Remove the HidServDirectoryV2 option. Now all relays offer to
20805 store hidden service descriptors. Related to 16543.
20806 - Remove the VoteOnHidServDirectoriesV2 option, since all
20807 authorities have long set it to 1. Closes ticket 16543.
20810 - Document use of coverity, clang static analyzer, and clang dynamic
20811 undefined behavior and address sanitizers in doc/HACKING. Include
20812 detailed usage instructions in the blacklist. Patch by "teor".
20813 Closes ticket 15817.
20814 - The link authentication protocol code now has extensive tests.
20815 - The relay descriptor signature testing code now has
20817 - The test_workqueue program now runs faster, and is enabled by
20818 default as a part of "make check".
20819 - Now that OpenSSL has its own scrypt implementation, add an unit
20820 test that checks for interoperability between libscrypt_scrypt()
20821 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
20822 and rely on EVP_PBE_scrypt() whenever possible. Resolves
20826 Changes in version 0.2.6.10 - 2015-07-12
20827 Tor version 0.2.6.10 fixes some significant stability and hidden
20828 service client bugs, bulletproofs the cryptography init process, and
20829 fixes a bug when using the sandbox code with some older versions of
20830 Linux. Everyone running an older version, especially an older version
20831 of 0.2.6, should upgrade.
20833 o Major bugfixes (hidden service clients, stability):
20834 - Stop refusing to store updated hidden service descriptors on a
20835 client. This reverts commit 9407040c59218 (which indeed fixed bug
20836 14219, but introduced a major hidden service reachability
20837 regression detailed in bug 16381). This is a temporary fix since
20838 we can live with the minor issue in bug 14219 (it just results in
20839 some load on the network) but the regression of 16381 is too much
20840 of a setback. First-round fix for bug 16381; bugfix
20843 o Major bugfixes (stability):
20844 - Stop crashing with an assertion failure when parsing certain kinds
20845 of malformed or truncated microdescriptors. Fixes bug 16400;
20846 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20847 by "cypherpunks_backup".
20848 - Stop random client-side assertion failures that could occur when
20849 connecting to a busy hidden service, or connecting to a hidden
20850 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20853 o Minor features (geoip):
20854 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20855 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20857 o Minor bugfixes (crypto error-handling):
20858 - Check for failures from crypto_early_init, and refuse to continue.
20859 A previous typo meant that we could keep going with an
20860 uninitialized crypto library, and would have OpenSSL initialize
20861 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20862 when implementing ticket 4900. Patch by "teor".
20864 o Minor bugfixes (Linux seccomp2 sandbox):
20865 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20866 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20867 on 0.2.6.3-alpha. Patch from "teor".
20870 Changes in version 0.2.6.9 - 2015-06-11
20871 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
20872 requirements for receiving an HSDir flag, and addresses some other small
20873 bugs in the systemd and sandbox code. Clients using circuit isolation
20874 should upgrade; all directory authorities should upgrade.
20876 o Major bugfixes (client-side privacy):
20877 - Properly separate out each SOCKSPort when applying stream
20878 isolation. The error occurred because each port's session group was
20879 being overwritten by a default value when the listener connection
20880 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
20883 o Minor feature (directory authorities, security):
20884 - The HSDir flag given by authorities now requires the Stable flag.
20885 For the current network, this results in going from 2887 to 2806
20886 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20887 attack by raising the effort for a relay to become Stable which
20888 takes at the very least 7 days to do so and by keeping the 96
20889 hours uptime requirement for HSDir. Implements ticket 8243.
20891 o Minor bugfixes (compilation):
20892 - Build with --enable-systemd correctly when libsystemd is
20893 installed, but systemd is not. Fixes bug 16164; bugfix on
20894 0.2.6.3-alpha. Patch from Peter Palfrader.
20896 o Minor bugfixes (Linux seccomp2 sandbox):
20897 - Fix sandboxing to work when running as a relaymby renaming of
20898 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
20899 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
20900 - Allow systemd connections to work with the Linux seccomp2 sandbox
20901 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20904 o Minor bugfixes (tests):
20905 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20906 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20909 Changes in version 0.2.6.8 - 2015-05-21
20910 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
20911 fixes an authority-side bug in assigning the HSDir flag. All directory
20912 authorities should upgrade.
20914 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
20915 - Revert commit that made directory authorities assign the HSDir
20916 flag to relays without a DirPort; this was bad because such relays
20917 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20920 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
20921 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20922 a client authorized hidden service. Fixes bug 15823; bugfix
20925 o Minor features (geoip):
20926 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20927 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20931 Changes in version 0.2.7.1-alpha - 2015-05-12
20932 Tor 0.2.7.1-alpha is the first alpha release in its series. It
20933 includes numerous small features and bugfixes against previous Tor
20934 versions, and numerous small infrastructure improvements. The most
20935 notable features are several new ways for controllers to interact with
20936 the hidden services subsystem.
20938 o New system requirements:
20939 - Tor no longer includes workarounds to support Libevent versions
20940 before 1.3e. Libevent 2.0 or later is recommended. Closes
20943 o Major features (controller):
20944 - Add the ADD_ONION and DEL_ONION commands that allow the creation
20945 and management of hidden services via the controller. Closes
20947 - New "GETINFO onions/current" and "GETINFO onions/detached"
20948 commands to get information about hidden services created via the
20949 controller. Part of ticket 6411.
20950 - New HSFETCH command to launch a request for a hidden service
20951 descriptor. Closes ticket 14847.
20952 - New HSPOST command to upload a hidden service descriptor. Closes
20953 ticket 3523. Patch by "DonnchaC".
20955 o Major bugfixes (hidden services):
20956 - Revert commit that made directory authorities assign the HSDir
20957 flag to relays without a DirPort; this was bad because such relays
20958 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20961 o Minor features (clock-jump tolerance):
20962 - Recover better when our clock jumps back many hours, like might
20963 happen for Tails or Whonix users who start with a very wrong
20964 hardware clock, use Tor to discover a more accurate time, and then
20965 fix their clock. Resolves part of ticket 8766.
20967 o Minor features (command-line interface):
20968 - Make --hash-password imply --hush to prevent unnecessary noise.
20969 Closes ticket 15542. Patch from "cypherpunks".
20970 - Print a warning whenever we find a relative file path being used
20971 as torrc option. Resolves issue 14018.
20973 o Minor features (controller):
20974 - Add DirAuthority lines for default directory authorities to the
20975 output of the "GETINFO config/defaults" command if not already
20976 present. Implements ticket 14840.
20977 - Controllers can now use "GETINFO hs/client/desc/id/..." to
20978 retrieve items from the client's hidden service descriptor cache.
20979 Closes ticket 14845.
20980 - Implement a new controller command "GETINFO status/fresh-relay-
20981 descs" to fetch a descriptor/extrainfo pair that was generated on
20982 demand just for the controller's use. Implements ticket 14784.
20984 o Minor features (DoS-resistance):
20985 - Make it harder for attackers to overload hidden services with
20986 introductions, by blocking multiple introduction requests on the
20987 same circuit. Resolves ticket 15515.
20989 o Minor features (geoip):
20990 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20991 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20994 o Minor features (HS popularity countermeasure):
20995 - To avoid leaking HS popularity, don't cycle the introduction point
20996 when we've handled a fixed number of INTRODUCE2 cells but instead
20997 cycle it when a random number of introductions is reached, thus
20998 making it more difficult for an attacker to find out the amount of
20999 clients that have used the introduction point for a specific HS.
21000 Closes ticket 15745.
21002 o Minor features (logging):
21003 - Include the Tor version in all LD_BUG log messages, since people
21004 tend to cut and paste those into the bugtracker. Implements
21007 o Minor features (pluggable transports):
21008 - When launching managed pluggable transports on Linux systems,
21009 attempt to have the kernel deliver a SIGTERM on tor exit if the
21010 pluggable transport process is still running. Resolves
21012 - When launching managed pluggable transports, setup a valid open
21013 stdin in the child process that can be used to detect if tor has
21014 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
21015 can be used by implementations to detect this new behavior.
21016 Resolves ticket 15435.
21018 o Minor features (testing):
21019 - Add a test to verify that the compiler does not eliminate our
21020 memwipe() implementation. Closes ticket 15377.
21021 - Add make rule `check-changes` to verify the format of changes
21022 files. Closes ticket 15180.
21023 - Add unit tests for control_event_is_interesting(). Add a compile-
21024 time check that the number of events doesn't exceed the capacity
21025 of control_event_t.event_mask. Closes ticket 15431, checks for
21026 bugs similar to 13085. Patch by "teor".
21027 - Command-line argument tests moved to Stem. Resolves ticket 14806.
21028 - Integrate the ntor, backtrace, and zero-length keys tests into the
21029 automake test suite. Closes ticket 15344.
21030 - Remove assertions during builds to determine Tor's test coverage.
21031 We don't want to trigger these even in assertions, so including
21032 them artificially makes our branch coverage look worse than it is.
21033 This patch provides the new test-stem-full and coverage-html-full
21034 configure options. Implements ticket 15400.
21036 o Minor bugfixes (build):
21037 - Improve out-of-tree builds by making non-standard rules work and
21038 clean up additional files and directories. Fixes bug 15053; bugfix
21041 o Minor bugfixes (command-line interface):
21042 - When "--quiet" is provided along with "--validate-config", do not
21043 write anything to stdout on success. Fixes bug 14994; bugfix
21045 - When complaining about bad arguments to "--dump-config", use
21046 stderr, not stdout.
21048 o Minor bugfixes (configuration, unit tests):
21049 - Only add the default fallback directories when the DirAuthorities,
21050 AlternateDirAuthority, and FallbackDir directory config options
21051 are set to their defaults. The default fallback directory list is
21052 currently empty, this fix will only change tor's behavior when it
21053 has default fallback directories. Includes unit tests for
21054 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
21055 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
21057 o Minor bugfixes (correctness):
21058 - For correctness, avoid modifying a constant string in
21059 handle_control_postdescriptor. Fixes bug 15546; bugfix
21061 - Remove side-effects from tor_assert() calls. This was harmless,
21062 because we never disable assertions, but it is bad style and
21063 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
21066 o Minor bugfixes (hidden service):
21067 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
21068 a client authorized hidden service. Fixes bug 15823; bugfix
21070 - Remove an extraneous newline character from the end of hidden
21071 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
21073 o Minor bugfixes (interface):
21074 - Print usage information for --dump-config when it is used without
21075 an argument. Also, fix the error message to use different wording
21076 and add newline at the end. Fixes bug 15541; bugfix
21079 o Minor bugfixes (logs):
21080 - When building Tor under Clang, do not include an extra set of
21081 parentheses in log messages that include function names. Fixes bug
21082 15269; bugfix on every released version of Tor when compiled with
21083 recent enough Clang.
21085 o Minor bugfixes (network):
21086 - When attempting to use fallback technique for network interface
21087 lookup, disregard loopback and multicast addresses since they are
21088 unsuitable for public communications.
21090 o Minor bugfixes (statistics):
21091 - Disregard the ConnDirectionStatistics torrc options when Tor is
21092 not a relay since in that mode of operation no sensible data is
21093 being collected and because Tor might run into measurement hiccups
21094 when running as a client for some time, then becoming a relay.
21095 Fixes bug 15604; bugfix on 0.2.2.35.
21097 o Minor bugfixes (test networks):
21098 - When self-testing reachability, use ExtendAllowPrivateAddresses to
21099 determine if local/private addresses imply reachability. The
21100 previous fix used TestingTorNetwork, which implies
21101 ExtendAllowPrivateAddresses, but this excluded rare configurations
21102 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
21103 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
21104 issue discovered by CJ Ess.
21106 o Minor bugfixes (testing):
21107 - Check for matching value in server response in ntor_ref.py. Fixes
21108 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
21110 - Set the severity correctly when testing
21111 get_interface_addresses_ifaddrs() and
21112 get_interface_addresses_win32(), so that the tests fail gracefully
21113 instead of triggering an assertion. Fixes bug 15759; bugfix on
21114 0.2.6.3-alpha. Reported by Nicolas Derive.
21116 o Code simplification and refactoring:
21117 - Move the hacky fallback code out of get_interface_address6() into
21118 separate function and get it covered with unit-tests. Resolves
21120 - Refactor hidden service client-side cache lookup to intelligently
21121 report its various failure cases, and disentangle failure cases
21122 involving a lack of introduction points. Closes ticket 14391.
21123 - Use our own Base64 encoder instead of OpenSSL's, to allow more
21124 control over the output. Part of ticket 15652.
21127 - Improve the descriptions of statistics-related torrc options in
21128 the manpage to describe rationale and possible uses cases. Fixes
21130 - Improve the layout and formatting of ./configure --help messages.
21131 Closes ticket 15024. Patch from "cypherpunks".
21132 - Standardize on the term "server descriptor" in the manual page.
21133 Previously, we had used "router descriptor", "server descriptor",
21134 and "relay descriptor" interchangeably. Part of ticket 14987.
21137 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
21138 and always use the internal Base64 decoder. The internal decoder
21139 has been part of tor since 0.2.0.10-alpha, and no one should
21140 be using the OpenSSL one. Part of ticket 15652.
21141 - Remove the 'tor_strclear()' function; use memwipe() instead.
21142 Closes ticket 14922.
21144 o Removed features:
21145 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
21146 fingerprinting we now recommend pluggable transports; for forward-
21147 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
21148 - Remove the undocumented "--digests" command-line option. It
21149 complicated our build process, caused subtle build issues on
21150 multiple platforms, and is now redundant since we started
21151 including git version identifiers. Closes ticket 14742.
21152 - Tor no longer contains checks for ancient directory cache versions
21153 that didn't know about microdescriptors.
21154 - Tor no longer contains workarounds for stat files generated by
21155 super-old versions of Tor that didn't choose guards sensibly.
21158 Changes in version 0.2.4.27 - 2015-04-06
21159 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
21160 could be used by an attacker to crash hidden services, or crash clients
21161 visiting hidden services. Hidden services should upgrade as soon as
21162 possible; clients should upgrade whenever packages become available.
21164 This release also backports a simple improvement to make hidden
21165 services a bit less vulnerable to denial-of-service attacks.
21167 o Major bugfixes (security, hidden service):
21168 - Fix an issue that would allow a malicious client to trigger an
21169 assertion failure and halt a hidden service. Fixes bug 15600;
21170 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
21171 - Fix a bug that could cause a client to crash with an assertion
21172 failure when parsing a malformed hidden service descriptor. Fixes
21173 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
21175 o Minor features (DoS-resistance, hidden service):
21176 - Introduction points no longer allow multiple INTRODUCE1 cells to
21177 arrive on the same circuit. This should make it more expensive for
21178 attackers to overwhelm hidden services with introductions.
21179 Resolves ticket 15515.
21182 Changes in version 0.2.5.12 - 2015-04-06
21183 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
21184 could be used by an attacker to crash hidden services, or crash clients
21185 visiting hidden services. Hidden services should upgrade as soon as
21186 possible; clients should upgrade whenever packages become available.
21188 This release also backports a simple improvement to make hidden
21189 services a bit less vulnerable to denial-of-service attacks.
21191 o Major bugfixes (security, hidden service):
21192 - Fix an issue that would allow a malicious client to trigger an
21193 assertion failure and halt a hidden service. Fixes bug 15600;
21194 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
21195 - Fix a bug that could cause a client to crash with an assertion
21196 failure when parsing a malformed hidden service descriptor. Fixes
21197 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
21199 o Minor features (DoS-resistance, hidden service):
21200 - Introduction points no longer allow multiple INTRODUCE1 cells to
21201 arrive on the same circuit. This should make it more expensive for
21202 attackers to overwhelm hidden services with introductions.
21203 Resolves ticket 15515.
21206 Changes in version 0.2.6.7 - 2015-04-06
21207 Tor 0.2.6.7 fixes two security issues that could be used by an
21208 attacker to crash hidden services, or crash clients visiting hidden
21209 services. Hidden services should upgrade as soon as possible; clients
21210 should upgrade whenever packages become available.
21212 This release also contains two simple improvements to make hidden
21213 services a bit less vulnerable to denial-of-service attacks.
21215 o Major bugfixes (security, hidden service):
21216 - Fix an issue that would allow a malicious client to trigger an
21217 assertion failure and halt a hidden service. Fixes bug 15600;
21218 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
21219 - Fix a bug that could cause a client to crash with an assertion
21220 failure when parsing a malformed hidden service descriptor. Fixes
21221 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
21223 o Minor features (DoS-resistance, hidden service):
21224 - Introduction points no longer allow multiple INTRODUCE1 cells to
21225 arrive on the same circuit. This should make it more expensive for
21226 attackers to overwhelm hidden services with introductions.
21227 Resolves ticket 15515.
21228 - Decrease the amount of reattempts that a hidden service performs
21229 when its rendezvous circuits fail. This reduces the computational
21230 cost for running a hidden service under heavy load. Resolves
21234 Changes in version 0.2.6.6 - 2015-03-24
21235 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
21237 It adds numerous safety, security, correctness, and performance
21238 improvements. Client programs can be configured to use more kinds of
21239 sockets, AutomapHosts works better, the multithreading backend is
21240 improved, cell transmission is refactored, test coverage is much
21241 higher, more denial-of-service attacks are handled, guard selection is
21242 improved to handle long-term guards better, pluggable transports
21243 should work a bit better, and some annoying hidden service performance
21244 bugs should be addressed.
21246 o Minor bugfixes (portability):
21247 - Use the correct datatype in the SipHash-2-4 function to prevent
21248 compilers from assuming any sort of alignment. Fixes bug 15436;
21249 bugfix on 0.2.5.3-alpha.
21251 Changes in version 0.2.6.5-rc - 2015-03-18
21252 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
21253 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
21255 o Major bugfixes (client):
21256 - Avoid crashing when making certain configuration option changes on
21257 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
21260 o Major bugfixes (pluggable transports):
21261 - Initialize the extended OR Port authentication cookie before
21262 launching pluggable transports. This prevents a race condition
21263 that occurred when server-side pluggable transports would cache the
21264 authentication cookie before it has been (re)generated. Fixes bug
21265 15240; bugfix on 0.2.5.1-alpha.
21267 o Major bugfixes (portability):
21268 - Do not crash on startup when running on Solaris. Fixes a bug
21269 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
21272 o Minor features (heartbeat):
21273 - On relays, report how many connections we negotiated using each
21274 version of the Tor link protocols. This information will let us
21275 know if removing support for very old versions of the Tor
21276 protocols is harming the network. Closes ticket 15212.
21278 o Code simplification and refactoring:
21279 - Refactor main loop to extract the 'loop' part. This makes it
21280 easier to run Tor under Shadow. Closes ticket 15176.
21283 Changes in version 0.2.5.11 - 2015-03-17
21284 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
21286 It backports several bugfixes from the 0.2.6 branch, including a
21287 couple of medium-level security fixes for relays and exit nodes.
21288 It also updates the list of directory authorities.
21290 o Directory authority changes:
21291 - Remove turtles as a directory authority.
21292 - Add longclaw as a new (v3) directory authority. This implements
21293 ticket 13296. This keeps the directory authority count at 9.
21294 - The directory authority Faravahar has a new IP address. This
21295 closes ticket 14487.
21297 o Major bugfixes (crash, OSX, security):
21298 - Fix a remote denial-of-service opportunity caused by a bug in
21299 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
21302 o Major bugfixes (relay, stability, possible security):
21303 - Fix a bug that could lead to a relay crashing with an assertion
21304 failure if a buffer of exactly the wrong layout was passed to
21305 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
21306 0.2.0.10-alpha. Patch from 'cypherpunks'.
21307 - Do not assert if the 'data' pointer on a buffer is advanced to the
21308 very end of the buffer; log a BUG message instead. Only assert if
21309 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
21311 o Major bugfixes (exit node stability):
21312 - Fix an assertion failure that could occur under high DNS load.
21313 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21314 diagnosed and fixed by "cypherpunks".
21316 o Major bugfixes (Linux seccomp2 sandbox):
21317 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
21318 crash during attempts to call wait4. Fixes bug 15088; bugfix on
21319 0.2.5.1-alpha. Patch from "sanic".
21321 o Minor features (controller):
21322 - New "GETINFO bw-event-cache" to get information about recent
21323 bandwidth events. Closes ticket 14128. Useful for controllers to
21324 get recent bandwidth history after the fix for ticket 13988.
21326 o Minor features (geoip):
21327 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
21328 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
21331 o Minor bugfixes (client, automapping):
21332 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
21333 no value follows the option. Fixes bug 14142; bugfix on
21334 0.2.4.7-alpha. Patch by "teor".
21335 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
21336 14195; bugfix on 0.1.0.1-rc.
21338 o Minor bugfixes (compilation):
21339 - Build without warnings with the stock OpenSSL srtp.h header, which
21340 has a duplicate declaration of SSL_get_selected_srtp_profile().
21341 Fixes bug 14220; this is OpenSSL's bug, not ours.
21343 o Minor bugfixes (directory authority):
21344 - Allow directory authorities to fetch more data from one another if
21345 they find themselves missing lots of votes. Previously, they had
21346 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21347 bugfix on 0.1.2.5-alpha.
21348 - Enlarge the buffer to read bwauth generated files to avoid an
21349 issue when parsing the file in dirserv_read_measured_bandwidths().
21350 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21352 o Minor bugfixes (statistics):
21353 - Increase period over which bandwidth observations are aggregated
21354 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21356 o Minor bugfixes (preventative security, C safety):
21357 - When reading a hexadecimal, base-32, or base-64 encoded value from
21358 a string, always overwrite the whole output buffer. This prevents
21359 some bugs where we would look at (but fortunately, not reveal)
21360 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21364 Changes in version 0.2.4.26 - 2015-03-17
21365 Tor 0.2.4.26 includes an updated list of directory authorities. It
21366 also backports a couple of stability and security bugfixes from 0.2.5
21369 o Directory authority changes:
21370 - Remove turtles as a directory authority.
21371 - Add longclaw as a new (v3) directory authority. This implements
21372 ticket 13296. This keeps the directory authority count at 9.
21373 - The directory authority Faravahar has a new IP address. This
21374 closes ticket 14487.
21376 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
21377 - Fix an assertion failure that could occur under high DNS load.
21378 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21379 diagnosed and fixed by "cypherpunks".
21381 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
21382 - Fix a bug that could lead to a relay crashing with an assertion
21383 failure if a buffer of exactly the wrong layout was passed to
21384 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
21385 0.2.0.10-alpha. Patch from 'cypherpunks'.
21386 - Do not assert if the 'data' pointer on a buffer is advanced to the
21387 very end of the buffer; log a BUG message instead. Only assert if
21388 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
21390 o Minor features (geoip):
21391 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
21392 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
21395 Changes in version 0.2.6.4-rc - 2015-03-09
21396 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
21397 attacker might be able to use in order to crash certain Tor
21398 directories. It also resolves some minor issues left over from, or
21399 introduced in, Tor 0.2.6.3-alpha or earlier.
21401 o Major bugfixes (crash, OSX, security):
21402 - Fix a remote denial-of-service opportunity caused by a bug in
21403 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
21406 o Major bugfixes (relay, stability, possible security):
21407 - Fix a bug that could lead to a relay crashing with an assertion
21408 failure if a buffer of exactly the wrong layout is passed to
21409 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
21410 0.2.0.10-alpha. Patch from "cypherpunks".
21411 - Do not assert if the 'data' pointer on a buffer is advanced to the
21412 very end of the buffer; log a BUG message instead. Only assert if
21413 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
21415 o Major bugfixes (FreeBSD IPFW transparent proxy):
21416 - Fix address detection with FreeBSD transparent proxies, when
21417 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
21420 o Major bugfixes (Linux seccomp2 sandbox):
21421 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
21422 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
21424 - Allow AF_UNIX hidden services to be used with the seccomp2
21425 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
21426 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
21427 crash during attempts to call wait4. Fixes bug 15088; bugfix on
21428 0.2.5.1-alpha. Patch from "sanic".
21430 o Minor features (controller):
21431 - Messages about problems in the bootstrap process now include
21432 information about the server we were trying to connect to when we
21433 noticed the problem. Closes ticket 15006.
21435 o Minor features (geoip):
21436 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
21437 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
21440 o Minor features (logs):
21441 - Quiet some log messages in the heartbeat and at startup. Closes
21444 o Minor bugfixes (certificate handling):
21445 - If an authority operator accidentally makes a signing certificate
21446 with a future publication time, do not discard its real signing
21447 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
21448 - Remove any old authority certificates that have been superseded
21449 for at least two days. Previously, we would keep superseded
21450 certificates until they expired, if they were published close in
21451 time to the certificate that superseded them. Fixes bug 11454;
21452 bugfix on 0.2.1.8-alpha.
21454 o Minor bugfixes (compilation):
21455 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
21457 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
21460 o Minor bugfixes (testing):
21461 - Fix endianness issues in unit test for resolve_my_address() to
21462 have it pass on big endian systems. Fixes bug 14980; bugfix on
21464 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
21465 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
21466 - When running the new 'make test-stem' target, use the configured
21467 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
21468 from "cypherpunks".
21469 - When running the zero-length-keys tests, do not use the default
21470 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
21473 o Directory authority IP change:
21474 - The directory authority Faravahar has a new IP address. This
21475 closes ticket 14487.
21478 - Remove some lingering dead code that once supported mempools.
21479 Mempools were disabled by default in 0.2.5, and removed entirely
21480 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
21484 Changes in version 0.2.6.3-alpha - 2015-02-19
21485 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
21486 the 0.2.6.x series. It introduces support for more kinds of sockets,
21487 makes it harder to accidentally run an exit, improves our
21488 multithreading backend, incorporates several fixes for the
21489 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
21491 If no major regressions or security holes are found in this version,
21492 the next version will be a release candidate.
21494 o Deprecated versions:
21495 - Tor relays older than 0.2.4.18-rc are no longer allowed to
21496 advertise themselves on the network. Closes ticket 13555.
21498 o Major features (security, unix domain sockets):
21499 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
21500 applications can reach Tor without having to create AF_INET or
21501 AF_INET6 sockets, meaning they can completely disable their
21502 ability to make non-Tor network connections. To create a socket of
21503 this type, use "SocksPort unix:/path/to/socket". Implements
21505 - Support mapping hidden service virtual ports to AF_UNIX sockets.
21506 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
21507 Implements ticket 11485.
21509 o Major features (changed defaults):
21510 - Prevent relay operators from unintentionally running exits: When a
21511 relay is configured as an exit node, we now warn the user unless
21512 the "ExitRelay" option is set to 1. We warn even more loudly if
21513 the relay is configured with the default exit policy, since this
21514 can indicate accidental misconfiguration. Setting "ExitRelay 0"
21515 stops Tor from running as an exit relay. Closes ticket 10067.
21517 o Major features (directory system):
21518 - When downloading server- or microdescriptors from a directory
21519 server, we no longer launch multiple simultaneous requests to the
21520 same server. This reduces load on the directory servers,
21521 especially when directory guards are in use. Closes ticket 9969.
21522 - When downloading server- or microdescriptors over a tunneled
21523 connection, do not limit the length of our requests to what the
21524 Squid proxy is willing to handle. Part of ticket 9969.
21525 - Authorities can now vote on the correct digests and latest
21526 versions for different software packages. This allows packages
21527 that include Tor to use the Tor authority system as a way to get
21528 notified of updates and their correct digests. Implements proposal
21529 227. Closes ticket 10395.
21531 o Major features (guards):
21532 - Introduce the Guardfraction feature to improves load balancing on
21533 guard nodes. Specifically, it aims to reduce the traffic gap that
21534 guard nodes experience when they first get the Guard flag. This is
21535 a required step if we want to increase the guard lifetime to 9
21536 months or greater. Closes ticket 9321.
21538 o Major features (performance):
21539 - Make the CPU worker implementation more efficient by avoiding the
21540 kernel and lengthening pipelines. The original implementation used
21541 sockets to transfer data from the main thread to the workers, and
21542 didn't allow any thread to be assigned more than a single piece of
21543 work at once. The new implementation avoids communications
21544 overhead by making requests in shared memory, avoiding kernel IO
21545 where possible, and keeping more requests in flight at once.
21546 Implements ticket 9682.
21548 o Major features (relay):
21549 - Raise the minimum acceptable configured bandwidth rate for bridges
21550 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
21551 20 KiB/sec.) Closes ticket 13822.
21553 o Major bugfixes (exit node stability):
21554 - Fix an assertion failure that could occur under high DNS load.
21555 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21556 diagnosed and fixed by "cypherpunks".
21558 o Major bugfixes (mixed relay-client operation):
21559 - When running as a relay and client at the same time (not
21560 recommended), if we decide not to use a new guard because we want
21561 to retry older guards, only close the locally-originating circuits
21562 passing through that guard. Previously we would close all the
21563 circuits through that guard. Fixes bug 9819; bugfix on
21564 0.2.1.1-alpha. Reported by "skruffy".
21566 o Minor features (build):
21567 - New --disable-system-torrc compile-time option to prevent Tor from
21568 looking for the system-wide torrc or torrc-defaults files.
21569 Resolves ticket 13037.
21571 o Minor features (controller):
21572 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
21573 events so controllers can observe circuit isolation inputs. Closes
21575 - ControlPort now supports the unix:/path/to/socket syntax as an
21576 alternative to the ControlSocket option, for consistency with
21577 SocksPort and HiddenServicePort. Closes ticket 14451.
21578 - New "GETINFO bw-event-cache" to get information about recent
21579 bandwidth events. Closes ticket 14128. Useful for controllers to
21580 get recent bandwidth history after the fix for ticket 13988.
21582 o Minor features (Denial of service resistance):
21583 - Count the total number of bytes used storing hidden service
21584 descriptors against the value of MaxMemInQueues. If we're low on
21585 memory, and more than 20% of our memory is used holding hidden
21586 service descriptors, free them until no more than 10% of our
21587 memory holds hidden service descriptors. Free the least recently
21588 fetched descriptors first. Resolves ticket 13806.
21589 - When we have recently been under memory pressure (over 3/4 of
21590 MaxMemInQueues is allocated), then allocate smaller zlib objects
21591 for small requests. Closes ticket 11791.
21593 o Minor features (geoip):
21594 - Update geoip and geoip6 files to the January 7 2015 Maxmind
21595 GeoLite2 Country database.
21597 o Minor features (guard nodes):
21598 - Reduce the time delay before saving guard status to disk from 10
21599 minutes to 30 seconds (or from one hour to 10 minutes if
21600 AvoidDiskWrites is set). Closes ticket 12485.
21602 o Minor features (hidden service):
21603 - Make Sybil attacks against hidden services harder by changing the
21604 minimum time required to get the HSDir flag from 25 hours up to 96
21605 hours. Addresses ticket 14149.
21606 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
21607 services to disable the anti-scanning feature introduced in
21608 0.2.6.2-alpha. With this option not set, a connection to an
21609 unlisted port closes the circuit. With this option set, only a
21610 RELAY_DONE cell is sent. Closes ticket 14084.
21612 o Minor features (interface):
21613 - Implement "-f -" command-line option to read torrc configuration
21614 from standard input, if you don't want to store the torrc file in
21615 the file system. Implements feature 13865.
21617 o Minor features (logging):
21618 - Add a count of unique clients to the bridge heartbeat message.
21619 Resolves ticket 6852.
21620 - Suppress "router info incompatible with extra info" message when
21621 reading extrainfo documents from cache. (This message got loud
21622 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
21624 - Elevate hidden service authorized-client message from DEBUG to
21625 INFO. Closes ticket 14015.
21627 o Minor features (stability):
21628 - Add assertions in our hash-table iteration code to check for
21629 corrupted values that could cause infinite loops. Closes
21632 o Minor features (systemd):
21633 - Various improvements and modernizations in systemd hardening
21634 support. Closes ticket 13805. Patch from Craig Andrews.
21636 o Minor features (testing networks):
21637 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
21638 and the default on a testing network to 2 minutes. Drop the
21639 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
21640 keep the default on a testing network at 30 seconds. This reduces
21641 HS bootstrap time to around 25 seconds. Also, change the default
21642 time in test-network.sh to match. Closes ticket 13401. Patch
21644 - Create TestingDirAuthVoteHSDir to correspond to
21645 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
21646 HSDir flag for the listed relays regardless of uptime or ORPort
21647 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
21648 Partial implementation for ticket 14067. Patch by "teor".
21650 o Minor features (tor2web mode):
21651 - Introduce the config option Tor2webRendezvousPoints, which allows
21652 clients in Tor2webMode to select a specific Rendezvous Point to be
21653 used in HS circuits. This might allow better performance for
21654 Tor2Web nodes. Implements ticket 12844.
21656 o Minor bugfixes (client DNS):
21657 - Report the correct cached DNS expiration times on SOCKS port or in
21658 DNS replies. Previously, we would report everything as "never
21659 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
21660 - Avoid a small memory leak when we find a cached answer for a
21661 reverse DNS lookup in a client-side DNS cache. (Remember, client-
21662 side DNS caching is off by default, and is not recommended.) Fixes
21663 bug 14259; bugfix on 0.2.0.1-alpha.
21665 o Minor bugfixes (client, automapping):
21666 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
21667 no value follows the option. Fixes bug 14142; bugfix on
21668 0.2.4.7-alpha. Patch by "teor".
21669 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
21670 14195; bugfix on 0.1.0.1-rc.
21671 - Prevent changes to other options from removing the wildcard value
21672 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
21674 - Allow MapAddress and AutomapHostsOnResolve to work together when
21675 an address is mapped into another address type (like .onion) that
21676 must be automapped at resolve time. Fixes bug 7555; bugfix
21679 o Minor bugfixes (client, bridges):
21680 - When we are using bridges and we had a network connectivity
21681 problem, only retry connecting to our currently configured
21682 bridges, not all bridges we know about and remember using. Fixes
21683 bug 14216; bugfix on 0.2.2.17-alpha.
21685 o Minor bugfixes (client, IPv6):
21686 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
21687 flag is not set; and not because the NoIPv4Traffic flag was set.
21688 Previously we'd looked at the NoIPv4Traffic flag for both types of
21689 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
21691 o Minor bugfixes (compilation):
21692 - The address of an array in the middle of a structure will always
21693 be non-NULL. clang recognises this and complains. Disable the
21694 tautologous and redundant check to silence this warning. Fixes bug
21695 14001; bugfix on 0.2.1.2-alpha.
21696 - Avoid warnings when building with systemd 209 or later. Fixes bug
21697 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
21698 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
21699 Addresses ticket 14188.
21700 - Build without warnings with the stock OpenSSL srtp.h header, which
21701 has a duplicate declaration of SSL_get_selected_srtp_profile().
21702 Fixes bug 14220; this is OpenSSL's bug, not ours.
21703 - Do not compile any code related to Tor2Web mode when Tor2Web mode
21704 is not enabled at compile time. Previously, this code was included
21705 in a disabled state. See discussion on ticket 12844.
21706 - Remove the --disable-threads configure option again. It was
21707 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
21708 14819; bugfix on 0.2.6.2-alpha.
21710 o Minor bugfixes (controller):
21711 - Report "down" in response to the "GETINFO entry-guards" command
21712 when relays are down with an unreachable_since value. Previously,
21713 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
21714 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
21715 14116; bugfix on 0.2.2.9-alpha.
21716 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
21717 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
21719 o Minor bugfixes (directory authority):
21720 - Allow directory authorities to fetch more data from one another if
21721 they find themselves missing lots of votes. Previously, they had
21722 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21723 bugfix on 0.1.2.5-alpha.
21724 - Do not attempt to download extrainfo documents which we will be
21725 unable to validate with a matching server descriptor. Fixes bug
21726 13762; bugfix on 0.2.0.1-alpha.
21727 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
21728 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
21729 - Enlarge the buffer to read bwauth generated files to avoid an
21730 issue when parsing the file in dirserv_read_measured_bandwidths().
21731 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21733 o Minor bugfixes (file handling):
21734 - Stop failing when key files are zero-length. Instead, generate new
21735 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
21736 on all versions of Tor. Patch by "teor".
21737 - Stop generating a fresh .old RSA onion key file when the .old file
21738 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
21739 - Avoid overwriting .old key files with empty key files.
21740 - Skip loading zero-length extrainfo store, router store, stats,
21741 state, and key files.
21742 - Avoid crashing when trying to reload a torrc specified as a
21743 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
21746 o Minor bugfixes (hidden services):
21747 - Close the introduction circuit when we have no more usable intro
21748 points, instead of waiting for it to time out. This also ensures
21749 that no follow-up HS descriptor fetch is triggered when the
21750 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
21751 - When fetching a hidden service descriptor for a down service that
21752 was recently up, do not keep refetching until we try the same
21753 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
21754 - Successfully launch Tor with a nonexistent hidden service
21755 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
21756 14106; bugfix on 0.2.6.2-alpha.
21758 o Minor bugfixes (logging):
21759 - Avoid crashing when there are more log domains than entries in
21760 domain_list. Bugfix on 0.2.3.1-alpha.
21761 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
21763 - Don't log messages to stdout twice when starting up. Fixes bug
21764 13993; bugfix on 0.2.6.1-alpha.
21766 o Minor bugfixes (parsing):
21767 - Stop accepting milliseconds (or other junk) at the end of
21768 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
21769 - Support two-number and three-number version numbers correctly, in
21770 case we change the Tor versioning system in the future. Fixes bug
21771 13661; bugfix on 0.0.8pre1.
21773 o Minor bugfixes (path counting):
21774 - When deciding whether the consensus lists any exit nodes, count
21775 the number listed in the consensus, not the number we have
21776 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
21777 - When deciding whether we have any exit nodes, only examine
21778 ExitNodes when the ExitNodes option is actually set. Fixes part of
21779 bug 14918; bugfix on 0.2.6.2-alpha.
21780 - Get rid of redundant and possibly scary warnings that we are
21781 missing directory information while we bootstrap. Fixes part of
21782 bug 14918; bugfix on 0.2.6.2-alpha.
21784 o Minor bugfixes (portability):
21785 - Fix the ioctl()-based network interface lookup code so that it
21786 will work on systems that have variable-length struct ifreq, for
21788 - Fix scheduler compilation on targets where char is unsigned. Fixes
21789 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
21791 o Minor bugfixes (sandbox):
21792 - Allow glibc fatal errors to be sent to stderr before Tor exits.
21793 Previously, glibc would try to write them to /dev/tty, and the
21794 sandbox would trap the call and make Tor exit prematurely. Fixes
21795 bug 14759; bugfix on 0.2.5.1-alpha.
21797 o Minor bugfixes (shutdown):
21798 - When shutting down, always call event_del() on lingering read or
21799 write events before freeing them. Otherwise, we risk double-frees
21800 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
21803 o Minor bugfixes (small memory leaks):
21804 - Avoid leaking memory when using IPv6 virtual address mappings.
21805 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
21808 o Minor bugfixes (statistics):
21809 - Increase period over which bandwidth observations are aggregated
21810 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21812 o Minor bugfixes (systemd support):
21813 - Fix detection and operation of systemd watchdog. Fixes part of bug
21814 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
21815 - Run correctly under systemd with the RunAsDaemon option set. Fixes
21816 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
21817 - Inform the systemd supervisor about more changes in the Tor
21818 process status. Implements part of ticket 14141. Patch from
21820 - Cause the "--disable-systemd" option to actually disable systemd
21821 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
21824 o Minor bugfixes (TLS):
21825 - Check more thoroughly throughout the TLS code for possible
21826 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
21828 o Minor bugfixes (transparent proxy):
21829 - Use getsockname, not getsockopt, to retrieve the address for a
21830 TPROXY-redirected connection. Fixes bug 13796; bugfix
21833 o Code simplification and refactoring:
21834 - Move fields related to isolating and configuring client ports into
21835 a shared structure. Previously, they were duplicated across
21836 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
21837 to copy them correctly had been the cause of at least one bug in
21838 the past. Closes ticket 8546.
21839 - Refactor the get_interface_addresses_raw() doom-function into
21840 multiple smaller and simpler subfunctions. Cover the resulting
21841 subfunctions with unit-tests. Fixes a significant portion of
21843 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
21844 only for version <= 0.2.2.24 which is now deprecated. Closes
21846 - Remove a test for a long-defunct broken version-one
21850 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
21851 for writing the OpenBSD-specific tips. Resolves ticket 13702.
21852 - Make the tor-resolve documentation match its help string and its
21853 options. Resolves part of ticket 14325.
21854 - Log a more useful error message from tor-resolve when failing to
21855 look up a hidden service address. Resolves part of ticket 14325.
21857 o Downgraded warnings:
21858 - Don't warn when we've attempted to contact a relay using the wrong
21859 ntor onion key. Closes ticket 9635.
21861 o Removed features:
21862 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
21863 longer silently accepted as an alias for "ExitNodes".
21864 - The --enable-mempool and --enable-buf-freelists options, which
21865 were originally created to work around bad malloc implementations,
21866 no longer exist. They were off-by-default in 0.2.5. Closes
21870 - Make the checkdir/perms test complete successfully even if the
21871 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
21872 - Test that tor does not fail when key files are zero-length. Check
21873 that tor generates new keys, and overwrites the empty key files.
21874 - Test that tor generates new keys when keys are missing
21875 (existing behavior).
21876 - Test that tor does not overwrite key files that already contain
21877 data (existing behavior). Tests bug 13111. Patch by "teor".
21878 - New "make test-stem" target to run stem integration tests.
21879 Requires that the "STEM_SOURCE_DIR" environment variable be set.
21880 Closes ticket 14107.
21881 - Make the test_cmdline_args.py script work correctly on Windows.
21882 Patch from Gisle Vanem.
21883 - Move the slower unit tests into a new "./src/test/test-slow"
21884 binary that can be run independently of the other tests. Closes
21886 - Avoid undefined behavior when sampling huge values from the
21887 Laplace distribution. This made unittests fail on Raspberry Pi.
21888 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
21891 Changes in version 0.2.6.2-alpha - 2014-12-31
21892 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
21893 It introduces a major new backend for deciding when to send cells on
21894 channels, which should lead down the road to big performance
21895 increases. It contains security and statistics features for better
21896 work on hidden services, and numerous bugfixes.
21898 This release contains many new unit tests, along with major
21899 performance improvements for running testing networks using Chutney.
21900 Thanks to a series of patches contributed by "teor", testing networks
21901 should now bootstrap in seconds, rather than minutes.
21903 o Major features (relay, infrastructure):
21904 - Complete revision of the code that relays use to decide which cell
21905 to send next. Formerly, we selected the best circuit to write on
21906 each channel, but we didn't select among channels in any
21907 sophisticated way. Now, we choose the best circuits globally from
21908 among those whose channels are ready to deliver traffic.
21910 This patch implements a new inter-cmux comparison API, a global
21911 high/low watermark mechanism and a global scheduler loop for
21912 transmission prioritization across all channels as well as among
21913 circuits on one channel. This schedule is currently tuned to
21914 (tolerantly) avoid making changes in network performance, but it
21915 should form the basis for major circuit performance increases in
21916 the future. Code by Andrea; tuning by Rob Jansen; implements
21919 o Major features (hidden services):
21920 - Make HS port scanning more difficult by immediately closing the
21921 circuit when a user attempts to connect to a nonexistent port.
21922 Closes ticket 13667.
21923 - Add a HiddenServiceStatistics option that allows Tor relays to
21924 gather and publish statistics about the overall size and volume of
21925 hidden service usage. Specifically, when this option is turned on,
21926 an HSDir will publish an approximate number of hidden services
21927 that have published descriptors to it the past 24 hours. Also, if
21928 a relay has acted as a hidden service rendezvous point, it will
21929 publish the approximate amount of rendezvous cells it has relayed
21930 the past 24 hours. The statistics themselves are obfuscated so
21931 that the exact values cannot be derived. For more details see
21932 proposal 238, "Better hidden service stats from Tor relays". This
21933 feature is currently disabled by default. Implements feature 13192.
21935 o Major bugfixes (client, automap):
21936 - Repair automapping with IPv6 addresses. This automapping should
21937 have worked previously, but one piece of debugging code that we
21938 inserted to detect a regression actually caused the regression to
21939 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
21940 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
21943 o Major bugfixes (hidden services):
21944 - When closing an introduction circuit that was opened in parallel
21945 with others, don't mark the introduction point as unreachable.
21946 Previously, the first successful connection to an introduction
21947 point would make the other introduction points get marked as
21948 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
21950 o Directory authority changes:
21951 - Remove turtles as a directory authority.
21952 - Add longclaw as a new (v3) directory authority. This implements
21953 ticket 13296. This keeps the directory authority count at 9.
21955 o Major removed features:
21956 - Tor clients no longer support connecting to hidden services
21957 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
21958 option has been removed. (There shouldn't be any hidden services
21959 running these versions on the network.) Closes ticket 7803.
21961 o Minor features (client):
21962 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
21963 is enabled, reject requests with IP addresses as hostnames.
21964 Resolves ticket 13315.
21966 o Minor features (controller):
21967 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
21968 write an unscheduled heartbeat message to the log. Implements
21971 o Minor features (geoip):
21972 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
21975 o Minor features (hidden services):
21976 - When re-enabling the network, don't try to build introduction
21977 circuits until we have successfully built a circuit. This makes
21978 hidden services come up faster when the network is re-enabled.
21979 Patch from "akwizgran". Closes ticket 13447.
21980 - When we fail to retrieve a hidden service descriptor, send the
21981 controller an "HS_DESC FAILED" controller event. Implements
21983 - New HiddenServiceDirGroupReadable option to cause hidden service
21984 directories and hostname files to be created group-readable. Patch
21985 from "anon", David Stainton, and "meejah". Closes ticket 11291.
21987 o Minor features (systemd):
21988 - Where supported, when running with systemd, report successful
21989 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
21990 - When running with systemd, support systemd watchdog messages. Part
21991 of ticket 11016. Patch by Michael Scherer.
21993 o Minor features (transparent proxy):
21994 - Update the transparent proxy option checks to allow for both ipfw
21995 and pf on OS X. Closes ticket 14002.
21996 - Use the correct option when using IPv6 with transparent proxy
21997 support on Linux. Resolves 13808. Patch by Francisco Blas
22000 o Minor bugfixes (preventative security, C safety):
22001 - When reading a hexadecimal, base-32, or base-64 encoded value from
22002 a string, always overwrite the whole output buffer. This prevents
22003 some bugs where we would look at (but fortunately, not reveal)
22004 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
22006 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
22007 just the part that's used. This makes it harder for data leak bugs
22008 to occur in the event of other programming failures. Resolves
22011 o Minor bugfixes (client, microdescriptors):
22012 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
22013 computing which microdescriptors to download. This keeps us from
22014 erroneous download behavior if two microdescriptor digests ever
22015 have the same first 160 bits. Fixes part of bug 13399; bugfix
22017 - Reset a router's status if its microdescriptor digest changes,
22018 even if the first 160 bits remain the same. Fixes part of bug
22019 13399; bugfix on 0.2.3.1-alpha.
22021 o Minor bugfixes (compilation):
22022 - Silence clang warnings under --enable-expensive-hardening,
22023 including implicit truncation of 64 bit values to 32 bit, const
22024 char assignment to self, tautological compare, and additional
22025 parentheses around equality tests. Fixes bug 13577; bugfix
22027 - Fix a clang warning about checking whether an address in the
22028 middle of a structure is NULL. Fixes bug 14001; bugfix
22031 o Minor bugfixes (hidden services):
22032 - Correctly send a controller event when we find that a rendezvous
22033 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
22034 - Pre-check directory permissions for new hidden-services to avoid
22035 at least one case of "Bug: Acting on config options left us in a
22036 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
22037 - When adding a new hidden service (for example, via SETCONF), Tor
22038 no longer congratulates the user for running a relay. Fixes bug
22039 13941; bugfix on 0.2.6.1-alpha.
22040 - When fetching hidden service descriptors, we now check not only
22041 for whether we got the hidden service we had in mind, but also
22042 whether we got the particular descriptors we wanted. This prevents
22043 a class of inefficient but annoying DoS attacks by hidden service
22044 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
22047 o Minor bugfixes (Linux seccomp2 sandbox):
22048 - Make transparent proxy support work along with the seccomp2
22049 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
22050 by Francisco Blas Izquierdo Riera.
22051 - Fix a memory leak in tor-resolve when running with the sandbox
22052 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
22054 o Minor bugfixes (logging):
22055 - Downgrade warnings about RSA signature failures to info log level.
22056 Emit a warning when an extra info document is found incompatible
22057 with a corresponding router descriptor. Fixes bug 9812; bugfix
22059 - Make connection_ap_handshake_attach_circuit() log the circuit ID
22060 correctly. Fixes bug 13701; bugfix on 0.0.6.
22062 o Minor bugfixes (misc):
22063 - Stop allowing invalid address patterns like "*/24" that contain
22064 both a wildcard address and a bit prefix length. This affects all
22065 our address-range parsing code. Fixes bug 7484; bugfix
22068 o Minor bugfixes (testing networks, fast startup):
22069 - Allow Tor to build circuits using a consensus with no exits. If
22070 the consensus has no exits (typical of a bootstrapping test
22071 network), allow Tor to build circuits once enough descriptors have
22072 been downloaded. This assists in bootstrapping a testing Tor
22073 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
22075 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
22076 header to directory servers. This allows us to obtain consensuses
22077 promptly when the consensus interval is very short. This assists
22078 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
22079 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
22080 - Stop assuming that private addresses are local when checking
22081 reachability in a TestingTorNetwork. Instead, when testing, assume
22082 all OR connections are remote. (This is necessary due to many test
22083 scenarios running all relays on localhost.) This assists in
22084 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
22085 0.1.0.1-rc. Patch by "teor".
22086 - Avoid building exit circuits from a consensus with no exits. Now
22087 thanks to our fix for 13718, we accept a no-exit network as not
22088 wholly lost, but we need to remember not to try to build exit
22089 circuits on it. Closes ticket 13814; patch by "teor".
22090 - Stop requiring exits to have non-zero bandwithcapacity in a
22091 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
22092 ignore exit bandwidthcapacity. This assists in bootstrapping a
22093 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
22094 on 0.2.0.3-alpha. Patch by "teor".
22095 - Add "internal" to some bootstrap statuses when no exits are
22096 available. If the consensus does not contain Exits, Tor will only
22097 build internal circuits. In this case, relevant statuses will
22098 contain the word "internal" as indicated in the Tor control-
22099 spec.txt. When bootstrap completes, Tor will be ready to build
22100 internal circuits. If a future consensus contains Exits, exit
22101 circuits may become available. Fixes part of bug 13718; bugfix on
22102 0.2.4.10-alpha. Patch by "teor".
22103 - Decrease minimum consensus interval to 10 seconds when
22104 TestingTorNetwork is set, or 5 seconds for the first consensus.
22105 Fix assumptions throughout the code that assume larger intervals.
22106 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
22108 - Avoid excluding guards from path building in minimal test
22109 networks, when we're in a test network and excluding guards would
22110 exclude all relays. This typically occurs in incredibly small tor
22111 networks, and those using "TestingAuthVoteGuard *". Fixes part of
22112 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
22114 o Code simplification and refactoring:
22115 - Stop using can_complete_circuits as a global variable; access it
22116 with a function instead.
22117 - Avoid using operators directly as macro arguments: this lets us
22118 apply coccinelle transformations to our codebase more directly.
22119 Closes ticket 13172.
22120 - Combine the functions used to parse ClientTransportPlugin and
22121 ServerTransportPlugin into a single function. Closes ticket 6456.
22122 - Add inline functions and convenience macros for inspecting channel
22123 state. Refactor the code to use convenience macros instead of
22124 checking channel state directly. Fixes issue 7356.
22125 - Document all members of was_router_added_t and rename
22126 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
22127 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
22128 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
22129 constant instead of hardcoded value. Fixes issue 13840.
22130 - Refactor our generic strmap and digestmap types into a single
22131 implementation, so that we can add a new digest256map
22135 - Document the bridge-authority-only 'networkstatus-bridges' file.
22136 Closes ticket 13713; patch from "tom".
22137 - Fix typo in PredictedPortsRelevanceTime option description in
22138 manpage. Resolves issue 13707.
22139 - Stop suggesting that users specify relays by nickname: it isn't a
22140 good idea. Also, properly cross-reference how to specify relays in
22141 all parts of manual documenting options that take a list of
22142 relays. Closes ticket 13381.
22143 - Clarify the HiddenServiceDir option description in manpage to make
22144 it clear that relative paths are taken with respect to the current
22145 working directory. Also clarify that this behavior is not
22146 guaranteed to remain indefinitely. Fixes issue 13913.
22149 - New tests for many parts of channel, relay, and circuitmux
22150 functionality. Code by Andrea; part of 9262.
22151 - New tests for parse_transport_line(). Part of ticket 6456.
22152 - In the unit tests, use chgrp() to change the group of the unit
22153 test temporary directory to the current user, so that the sticky
22154 bit doesn't interfere with tests that check directory groups.
22156 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
22160 Changes in version 0.2.6.1-alpha - 2014-10-30
22161 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
22162 includes numerous code cleanups and new tests, and fixes a large
22163 number of annoying bugs. Out-of-memory conditions are handled better
22164 than in 0.2.5, pluggable transports have improved proxy support, and
22165 clients now use optimistic data for contacting hidden services. Also,
22166 we are now more robust to changes in what we consider a parseable
22167 directory object, so that tightening restrictions does not have a risk
22168 of introducing infinite download loops.
22170 This is the first alpha release in a new series, so expect there to be
22171 bugs. Users who would rather test out a more stable branch should stay
22172 with 0.2.5.x for now.
22174 o New compiler and system requirements:
22175 - Tor 0.2.6.x requires that your compiler support more of the C99
22176 language standard than before. The 'configure' script now detects
22177 whether your compiler supports C99 mid-block declarations and
22178 designated initializers. If it does not, Tor will not compile.
22180 We may revisit this requirement if it turns out that a significant
22181 number of people need to build Tor with compilers that don't
22182 bother implementing a 15-year-old standard. Closes ticket 13233.
22183 - Tor no longer supports systems without threading support. When we
22184 began working on Tor, there were several systems that didn't have
22185 threads, or where the thread support wasn't able to run the
22186 threads of a single process on multiple CPUs. That no longer
22187 holds: every system where Tor needs to run well now has threading
22188 support. Resolves ticket 12439.
22190 o Removed platform support:
22191 - We no longer include special code to build on Windows CE; as far
22192 as we know, nobody has used Tor on Windows CE in a very long time.
22193 Closes ticket 11446.
22195 o Major features (bridges):
22196 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
22197 transports if they are configured via the "TOR_PT_PROXY"
22198 environment variable. Implements proposal 232. Resolves
22201 o Major features (client performance, hidden services):
22202 - Allow clients to use optimistic data when connecting to a hidden
22203 service, which should remove a round-trip from hidden service
22204 initialization. See proposal 181 for details. Implements
22207 o Major features (directory system):
22208 - Upon receiving an unparseable directory object, if its digest
22209 matches what we expected, then don't try to download it again.
22210 Previously, when we got a descriptor we didn't like, we would keep
22211 trying to download it over and over. Closes ticket 11243.
22213 o Major features (sample torrc):
22214 - Add a new, infrequently-changed "torrc.minimal". This file is
22215 similar to torrc.sample, but it will change as infrequently as
22216 possible, for the benefit of users whose systems prompt them for
22217 intervention whenever a default configuration file is changed.
22218 Making this change allows us to update torrc.sample to be a more
22219 generally useful "sample torrc".
22221 o Major bugfixes (directory authorities):
22222 - Do not assign the HSDir flag to relays if they are not Valid, or
22223 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
22225 o Major bugfixes (directory bandwidth performance):
22226 - Don't flush the zlib buffer aggressively when compressing
22227 directory information for clients. This should save about 7% of
22228 the bandwidth currently used for compressed descriptors and
22229 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
22231 o Minor features (security, memory wiping):
22232 - Ensure we securely wipe keys from memory after
22233 crypto_digest_get_digest and init_curve25519_keypair_from_file
22234 have finished using them. Resolves ticket 13477.
22236 o Minor features (security, out-of-memory handling):
22237 - When handling an out-of-memory condition, allocate less memory for
22238 temporary data structures. Fixes issue 10115.
22239 - When handling an out-of-memory condition, consider more types of
22240 buffers, including those on directory connections, and zlib
22241 buffers. Resolves ticket 11792.
22244 - When identity keypair is generated for first time, log a
22245 congratulatory message that links to the new relay lifecycle
22246 document. Implements feature 10427.
22248 o Minor features (client):
22249 - Clients are now willing to send optimistic data (before they
22250 receive a 'connected' cell) to relays of any version. (Relays
22251 without support for optimistic data are no longer supported on the
22252 Tor network.) Resolves ticket 13153.
22254 o Minor features (directory authorities):
22255 - Don't list relays with a bandwidth estimate of 0 in the consensus.
22256 Implements a feature proposed during discussion of bug 13000.
22257 - In tor-gencert, report an error if the user provides the same
22258 argument more than once.
22259 - If a directory authority can't find a best consensus method in the
22260 votes that it holds, it now falls back to its favorite consensus
22261 method. Previously, it fell back to method 1. Neither of these is
22262 likely to get enough signatures, but "fall back to favorite"
22263 doesn't require us to maintain support an obsolete consensus
22264 method. Implements part of proposal 215.
22266 o Minor features (logging):
22267 - On Unix-like systems, you can now use named pipes as the target of
22268 the Log option, and other options that try to append to files.
22269 Closes ticket 12061. Patch from "carlo von lynX".
22270 - When opening a log file at startup, send it every log message that
22271 we generated between startup and opening it. Previously, log
22272 messages that were generated before opening the log file were only
22273 logged to stdout. Closes ticket 6938.
22274 - Add a TruncateLogFile option to overwrite logs instead of
22275 appending to them. Closes ticket 5583.
22277 o Minor features (portability, Solaris):
22278 - Threads are no longer disabled by default on Solaris; we believe
22279 that the versions of Solaris with broken threading support are all
22280 obsolete by now. Resolves ticket 9495.
22282 o Minor features (relay):
22283 - Re-check our address after we detect a changed IP address from
22284 getsockname(). This ensures that the controller command "GETINFO
22285 address" will report the correct value. Resolves ticket 11582.
22287 - A new AccountingRule option lets Relays set whether they'd like
22288 AccountingMax to be applied separately to inbound and outbound
22289 traffic, or applied to the sum of inbound and outbound traffic.
22290 Resolves ticket 961. Patch by "chobe".
22292 o Minor features (testing networks):
22293 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
22294 the "Exit" flag regardless of their uptime, bandwidth, or exit
22295 policy. TestingTorNetwork must be set for this option to have any
22296 effect. Previously, authorities would take up to 35 minutes to
22297 give nodes the Exit flag in a test network. Partially implements
22300 o Minor features (validation):
22301 - Check all date/time values passed to tor_timegm and
22302 parse_rfc1123_time for validity, taking leap years into account.
22303 Improves HTTP header validation. Implemented with bug 13476.
22304 - In correct_tm(), limit the range of values returned by system
22305 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
22306 This means we don't have to deal with negative or too large dates,
22307 even if a clock is wrong. Otherwise we might fail to read a file
22308 written by us which includes such a date. Fixes bug 13476.
22310 o Minor bugfixes (bridge clients):
22311 - When configured to use a bridge without an identity digest (not
22312 recommended), avoid launching an extra channel to it when
22313 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
22315 o Minor bugfixes (bridges):
22316 - When DisableNetwork is set, do not launch pluggable transport
22317 plugins, and if any are running, terminate them. Fixes bug 13213;
22318 bugfix on 0.2.3.6-alpha.
22320 o Minor bugfixes (C correctness):
22321 - Fix several instances of possible integer overflow/underflow/NaN.
22322 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
22324 - In circuit_build_times_calculate_timeout() in circuitstats.c,
22325 avoid dividing by zero in the pareto calculations. This traps
22326 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
22328 - Fix an integer overflow in format_time_interval(). Fixes bug
22329 13393; bugfix on 0.2.0.10-alpha.
22330 - Set the correct day of year value when the system's localtime(_r)
22331 or gmtime(_r) functions fail to set struct tm. Not externally
22332 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
22333 - Avoid unlikely signed integer overflow in tor_timegm on systems
22334 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
22336 o Minor bugfixes (client):
22337 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
22338 BadExit flag are not considered worthy candidates. Fixes bug
22339 13066; bugfix on 0.1.2.3-alpha.
22340 - Use the consensus schedule for downloading consensuses, and not
22341 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
22342 - Handle unsupported or malformed SOCKS5 requests properly by
22343 responding with the appropriate error message before closing the
22344 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
22346 o Minor bugfixes (client, torrc):
22347 - Stop modifying the value of our DirReqStatistics torrc option just
22348 because we're not a bridge or relay. This bug was causing Tor
22349 Browser users to write "DirReqStatistics 0" in their torrc files
22350 as if they had chosen to change the config. Fixes bug 4244; bugfix
22352 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
22353 that our options have changed every time we SIGHUP. Fixes bug
22354 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
22356 o Minor bugfixes (controller):
22357 - Return an error when the second or later arguments of the
22358 "setevents" controller command are invalid events. Previously we
22359 would return success while silently skipping invalid events. Fixes
22360 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
22362 o Minor bugfixes (directory system):
22363 - Always believe that v3 directory authorities serve extra-info
22364 documents, whether they advertise "caches-extra-info" or not.
22365 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
22366 - When running as a v3 directory authority, advertise that you serve
22367 extra-info documents so that clients who want them can find them
22368 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
22369 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
22370 Previously, directories offering BRIDGE_DIRINFO and some other
22371 flag (i.e. microdescriptors or extrainfo) would be ignored when
22372 looking for bridges. Partially fixes bug 13163; bugfix
22375 o Minor bugfixes (networking):
22376 - Check for orconns and use connection_or_close_for_error() rather
22377 than connection_mark_for_close() directly in the getsockopt()
22378 failure case of connection_handle_write_impl(). Fixes bug 11302;
22379 bugfix on 0.2.4.4-alpha.
22381 o Minor bugfixes (relay):
22382 - When generating our family list, remove spaces from around the
22383 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
22384 - If our previous bandwidth estimate was 0 bytes, allow publishing a
22385 new relay descriptor immediately. Fixes bug 13000; bugfix
22388 o Minor bugfixes (testing networks):
22389 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
22390 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
22391 - Stop using the default authorities in networks which provide both
22392 AlternateDirAuthority and AlternateBridgeAuthority. Partially
22393 fixes bug 13163; bugfix on 0.2.0.13-alpha.
22395 o Minor bugfixes (testing):
22396 - Stop spawn test failures due to a race condition between the
22397 SIGCHLD handler updating the process status, and the test reading
22398 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
22400 o Minor bugfixes (testing, Windows):
22401 - Avoid passing an extra backslash when creating a temporary
22402 directory for running the unit tests on Windows. Fixes bug 12392;
22403 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
22405 o Minor bugfixes (windows):
22406 - Remove code to special-case handling of NTE_BAD_KEYSET when
22407 acquiring windows CryptoAPI context. This error can't actually
22408 occur for the parameters we're providing. Fixes bug 10816; bugfix
22411 o Minor bugfixes (zlib):
22412 - Avoid truncating a zlib stream when trying to finalize it with an
22413 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
22416 - Allow our configure script to build correctly with autoconf 2.62
22417 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
22418 - Improve the error message from ./configure to make it clear that
22419 when asciidoc has not been found, the user will have to either add
22420 --disable-asciidoc argument or install asciidoc. Resolves
22423 o Code simplification and refactoring:
22424 - Change the entry_is_live() function to take named bitfield
22425 elements instead of an unnamed list of booleans. Closes
22427 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
22428 Resolves ticket 12205.
22429 - Use calloc and reallocarray functions instead of multiply-
22430 then-malloc. This makes it less likely for us to fall victim to an
22431 integer overflow attack when allocating. Resolves ticket 12855.
22432 - Use the standard macro name SIZE_MAX, instead of our
22434 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
22435 functions which take them as arguments. Replace 0 with NO_DIRINFO
22436 in a function call for clarity. Seeks to prevent future issues
22438 - Avoid 4 null pointer errors under clang static analysis by using
22439 tor_assert() to prove that the pointers aren't null. Fixes
22441 - Rework the API of policies_parse_exit_policy() to use a bitmask to
22442 represent parsing options, instead of a confusing mess of
22443 booleans. Resolves ticket 8197.
22444 - Introduce a helper function to parse ExitPolicy in
22445 or_options_t structure.
22448 - Add a doc/TUNING document with tips for handling large numbers of
22449 TCP connections when running busy Tor relay. Update the warning
22450 message to point to this file when running out of sockets
22451 operating system is allowing to use simultaneously. Resolves
22454 o Removed features:
22455 - We no longer remind the user about configuration options that have
22456 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
22457 - Remove our old, non-weighted bandwidth-based node selection code.
22458 Previously, we used it as a fallback when we couldn't perform
22459 weighted bandwidth-based node selection. But that would only
22460 happen in the cases where we had no consensus, or when we had a
22461 consensus generated by buggy or ancient directory authorities. In
22462 either case, it's better to use the more modern, better maintained
22463 algorithm, with reasonable defaults for the weights. Closes
22465 - Remove the --disable-curve25519 configure option. Relays and
22466 clients now are required to support curve25519 and the
22468 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
22469 used to be deprecated synonyms for "StrictNodes", are now marked
22470 obsolete. Resolves ticket 12226.
22471 - Clients don't understand the BadDirectory flag in the consensus
22472 anymore, and ignore it.
22475 - Refactor the function that chooses guard nodes so that it can more
22476 easily be tested; write some tests for it.
22477 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
22478 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
22479 - Create unit tests for format_time_interval(). With bug 13393.
22480 - Add unit tests for tor_timegm signed overflow, tor_timegm and
22481 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
22482 tests (visible) fixes in bug 13476.
22483 - Add a "coverage-html" make target to generate HTML-visualized
22484 coverage results when building with --enable-coverage. (Requires
22485 lcov.) Patch from Kevin Murray.
22486 - Enable the backtrace handler (where supported) when running the
22488 - Revise all unit tests that used the legacy test_* macros to
22489 instead use the recommended tt_* macros. This patch was generated
22490 with coccinelle, to avoid manual errors. Closes ticket 13119.
22492 o Distribution (systemd):
22493 - systemd unit file: only allow tor to write to /var/lib/tor and
22494 /var/log/tor. The rest of the filesystem is accessible for reading
22495 only. Patch by intrigeri; resolves ticket 12751.
22496 - systemd unit file: ensure that the process and all its children
22497 can never gain new privileges. Patch by intrigeri; resolves
22499 - systemd unit file: set up /var/run/tor as writable for the Tor
22500 service. Patch by intrigeri; resolves ticket 13196.
22502 o Removed features (directory authorities):
22503 - Remove code that prevented authorities from listing Tor relays
22504 affected by CVE-2011-2769 as guards. These relays are already
22505 rejected altogether due to the minimum version requirement of
22506 0.2.3.16-alpha. Closes ticket 13152.
22507 - The "AuthDirRejectUnlisted" option no longer has any effect, as
22508 the fingerprints file (approved-routers) has been deprecated.
22509 - Directory authorities do not support being Naming dirauths anymore.
22510 The "NamingAuthoritativeDir" config option is now obsolete.
22511 - Directory authorities do not support giving out the BadDirectory
22513 - Directory authorities no longer advertise or support consensus
22514 methods 1 through 12 inclusive. These consensus methods were
22515 obsolete and/or insecure: maintaining the ability to support them
22516 served no good purpose. Implements part of proposal 215; closes
22519 o Testing (test-network.sh):
22520 - Stop using "echo -n", as some shells' built-in echo doesn't
22521 support "-n". Instead, use "/bin/echo -n". Partially fixes
22523 - Stop an apparent test-network hang when used with make -j2. Fixes
22525 - Add a --delay option to test-network.sh, which configures the
22526 delay before the chutney network tests for data transmission.
22527 Partially implements ticket 13161.
22530 Changes in version 0.2.5.10 - 2014-10-24
22531 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
22533 It adds several new security features, including improved
22534 denial-of-service resistance for relays, new compiler hardening
22535 options, and a system-call sandbox for hardened installations on Linux
22536 (requires seccomp2). The controller protocol has several new features,
22537 resolving IPv6 addresses should work better than before, and relays
22538 should be a little more CPU-efficient. We've added support for more
22539 OpenBSD and FreeBSD transparent proxy types. We've improved the build
22540 system and testing infrastructure to allow unit testing of more parts
22541 of the Tor codebase. Finally, we've addressed several nagging pluggable
22542 transport usability issues, and included numerous other small bugfixes
22543 and features mentioned below.
22545 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
22546 have accumulated many known flaws; everyone should upgrade.
22548 o Deprecated versions:
22549 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
22550 attention for some while.
22553 Changes in version 0.2.5.9-rc - 2014-10-20
22554 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
22555 series. It disables SSL3 in response to the recent "POODLE" attack
22556 (even though POODLE does not affect Tor). It also works around a crash
22557 bug caused by some operating systems' response to the "POODLE" attack
22558 (which does affect Tor). It also contains a few miscellaneous fixes.
22560 o Major security fixes:
22561 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22562 today support TLS 1.0 or later, so we can safely turn off support
22563 for this old (and insecure) protocol. Fixes bug 13426.
22565 o Major bugfixes (openssl bug workaround):
22566 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22567 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22568 13471. This is a workaround for an OpenSSL bug.
22571 - Disable the sandbox name resolver cache when running tor-resolve:
22572 tor-resolve doesn't use the sandbox code, and turning it on was
22573 breaking attempts to do tor-resolve on a non-default server on
22574 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
22576 o Compilation fixes:
22577 - Build and run correctly on systems like OpenBSD-current that have
22578 patched OpenSSL to remove get_cipher_by_char and/or its
22579 implementations. Fixes issue 13325.
22581 o Downgraded warnings:
22582 - Downgrade the severity of the 'unexpected sendme cell from client'
22583 from 'warn' to 'protocol warning'. Closes ticket 8093.
22586 Changes in version 0.2.4.25 - 2014-10-20
22587 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
22588 (even though POODLE does not affect Tor). It also works around a crash
22589 bug caused by some operating systems' response to the "POODLE" attack
22590 (which does affect Tor).
22592 o Major security fixes (also in 0.2.5.9-rc):
22593 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22594 today support TLS 1.0 or later, so we can safely turn off support
22595 for this old (and insecure) protocol. Fixes bug 13426.
22597 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
22598 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22599 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22600 13471. This is a workaround for an OpenSSL bug.
22603 Changes in version 0.2.5.8-rc - 2014-09-22
22604 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
22605 series. It fixes a bug that affects consistency and speed when
22606 connecting to hidden services, and it updates the location of one of
22607 the directory authorities.
22610 - Clients now send the correct address for their chosen rendezvous
22611 point when trying to access a hidden service. They used to send
22612 the wrong address, which would still work some of the time because
22613 they also sent the identity digest of the rendezvous point, and if
22614 the hidden service happened to try connecting to the rendezvous
22615 point from a relay that already had a connection open to it,
22616 the relay would reuse that connection. Now connections to hidden
22617 services should be more robust and faster. Also, this bug meant
22618 that clients were leaking to the hidden service whether they were
22619 on a little-endian (common) or big-endian (rare) system, which for
22620 some users might have reduced their anonymity. Fixes bug 13151;
22621 bugfix on 0.2.1.5-alpha.
22623 o Directory authority changes:
22624 - Change IP address for gabelmoo (v3 directory authority).
22627 Changes in version 0.2.4.24 - 2014-09-22
22628 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
22629 connecting to hidden services, and it updates the location of one of
22630 the directory authorities.
22633 - Clients now send the correct address for their chosen rendezvous
22634 point when trying to access a hidden service. They used to send
22635 the wrong address, which would still work some of the time because
22636 they also sent the identity digest of the rendezvous point, and if
22637 the hidden service happened to try connecting to the rendezvous
22638 point from a relay that already had a connection open to it,
22639 the relay would reuse that connection. Now connections to hidden
22640 services should be more robust and faster. Also, this bug meant
22641 that clients were leaking to the hidden service whether they were
22642 on a little-endian (common) or big-endian (rare) system, which for
22643 some users might have reduced their anonymity. Fixes bug 13151;
22644 bugfix on 0.2.1.5-alpha.
22646 o Directory authority changes:
22647 - Change IP address for gabelmoo (v3 directory authority).
22649 o Minor features (geoip):
22650 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22654 Changes in version 0.2.5.7-rc - 2014-09-11
22655 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
22656 release series, and some long-standing bugs related to ORPort reachability
22657 testing and failure to send CREATE cells. It is the first release
22658 candidate for the Tor 0.2.5.x series.
22660 o Major bugfixes (client, startup):
22661 - Start making circuits as soon as DisabledNetwork is turned off.
22662 When Tor started with DisabledNetwork set, it would correctly
22663 conclude that it shouldn't build circuits, but it would mistakenly
22664 cache this conclusion, and continue believing it even when
22665 DisableNetwork is set to 0. Fixes the bug introduced by the fix
22666 for bug 11200; bugfix on 0.2.5.4-alpha.
22667 - Resume expanding abbreviations for command-line options. The fix
22668 for bug 4647 accidentally removed our hack from bug 586 that
22669 rewrote HashedControlPassword to __HashedControlSessionPassword
22670 when it appears on the commandline (which allowed the user to set
22671 her own HashedControlPassword in the torrc file while the
22672 controller generates a fresh session password for each run). Fixes
22673 bug 12948; bugfix on 0.2.5.1-alpha.
22674 - Warn about attempts to run hidden services and relays in the same
22675 process: that's probably not a good idea. Closes ticket 12908.
22677 o Major bugfixes (relay):
22678 - Avoid queuing or sending destroy cells for circuit ID zero when we
22679 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
22680 Found and fixed by "cypherpunks".
22681 - Fix ORPort reachability detection on relays running behind a
22682 proxy, by correctly updating the "local" mark on the controlling
22683 channel when changing the address of an or_connection_t after the
22684 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
22686 o Minor features (bridge):
22687 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
22688 cookie file for the ExtORPort g+r by default.
22690 o Minor features (geoip):
22691 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22694 o Minor bugfixes (logging):
22695 - Reduce the log severity of the "Pluggable transport proxy does not
22696 provide any needed transports and will not be launched." message,
22697 since Tor Browser includes several ClientTransportPlugin lines in
22698 its torrc-defaults file, leading every Tor Browser user who looks
22699 at her logs to see these notices and wonder if they're dangerous.
22700 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
22701 - Downgrade "Unexpected onionskin length after decryption" warning
22702 to a protocol-warn, since there's nothing relay operators can do
22703 about a client that sends them a malformed create cell. Resolves
22704 bug 12996; bugfix on 0.0.6rc1.
22705 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
22706 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
22707 - When logging information about an EXTEND2 or EXTENDED2 cell, log
22708 their names correctly. Fixes part of bug 12700; bugfix
22710 - When logging information about a relay cell whose command we don't
22711 recognize, log its command as an integer. Fixes part of bug 12700;
22712 bugfix on 0.2.1.10-alpha.
22713 - Escape all strings from the directory connection before logging
22714 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
22716 o Minor bugfixes (controller):
22717 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
22718 bug 12864; bugfix on 0.2.5.1-alpha.
22719 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
22720 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
22723 o Minor bugfixes (compilation):
22724 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
22725 bugfix on 0.2.5.5-alpha.
22726 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
22727 0.2.5.1-alpha. Patch from "NewEraCracker".
22728 - In routerlist_assert_ok(), don't take the address of a
22729 routerinfo's cache_info member unless that routerinfo is non-NULL.
22730 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
22731 - Fix a large number of false positive warnings from the clang
22732 analyzer static analysis tool. This should make real warnings
22733 easier for clang analyzer to find. Patch from "teor". Closes
22736 o Distribution (systemd):
22737 - Verify configuration file via ExecStartPre in the systemd unit
22738 file. Patch from intrigeri; resolves ticket 12730.
22739 - Explicitly disable RunAsDaemon in the systemd unit file. Our
22740 current systemd unit uses "Type = simple", so systemd does not
22741 expect tor to fork. If the user has "RunAsDaemon 1" in their
22742 torrc, then things won't work as expected. This is e.g. the case
22743 on Debian (and derivatives), since there we pass "--defaults-torrc
22744 /usr/share/tor/tor-service-defaults-torrc" (that contains
22745 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
22749 - Adjust the URLs in the README to refer to the new locations of
22750 several documents on the website. Fixes bug 12830. Patch from
22752 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
22756 Changes in version 0.2.5.6-alpha - 2014-07-28
22757 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
22758 risk from guard rotation, and fixes a variety of other issues to get
22759 us closer to a release candidate.
22761 o Major features (also in 0.2.4.23):
22762 - Make the number of entry guards configurable via a new
22763 NumEntryGuards consensus parameter, and the number of directory
22764 guards configurable via a new NumDirectoryGuards consensus
22765 parameter. Implements ticket 12688.
22767 o Major bugfixes (also in 0.2.4.23):
22768 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22769 implementation that caused incorrect results on 32-bit
22770 implementations when certain malformed inputs were used along with
22771 a small class of private ntor keys. This bug does not currently
22772 appear to allow an attacker to learn private keys or impersonate a
22773 Tor server, but it could provide a means to distinguish 32-bit Tor
22774 implementations from 64-bit Tor implementations. Fixes bug 12694;
22775 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22779 - Perform circuit cleanup operations even when circuit
22780 construction operations are disabled (because the network is
22781 disabled, or because there isn't enough directory information).
22782 Previously, when we were not building predictive circuits, we
22783 were not closing expired circuits either. Fixes bug 8387; bugfix on
22784 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
22785 became more strict about when we have "enough directory information
22786 to build circuits".
22789 - Authorities now assign the Guard flag to the fastest 25% of the
22790 network (it used to be the fastest 50%). Also raise the consensus
22791 weight that guarantees the Guard flag from 250 to 2000. For the
22792 current network, this results in about 1100 guards, down from 2500.
22793 This step paves the way for moving the number of entry guards
22794 down to 1 (proposal 236) while still providing reasonable expected
22795 performance for most users. Implements ticket 12690.
22796 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22798 - Slightly enhance the diagnostic message for bug 12184.
22800 o Minor bugfixes (also in 0.2.4.23):
22801 - Warn and drop the circuit if we receive an inbound 'relay early'
22802 cell. Those used to be normal to receive on hidden service circuits
22803 due to bug 1038, but the buggy Tor versions are long gone from
22804 the network so we can afford to resume watching for them. Resolves
22805 the rest of bug 1038; bugfix on 0.2.1.19.
22806 - Correct a confusing error message when trying to extend a circuit
22807 via the control protocol but we don't know a descriptor or
22808 microdescriptor for one of the specified relays. Fixes bug 12718;
22809 bugfix on 0.2.3.1-alpha.
22812 - Fix compilation when building with bufferevents enabled. (This
22813 configuration is still not expected to work, however.)
22814 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
22815 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
22817 - Compile correctly with builds and forks of OpenSSL (such as
22818 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
22819 0.2.1.1-alpha. Patch from "dhill".
22822 Changes in version 0.2.4.23 - 2014-07-28
22823 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
22824 guard rotation, and also backports several important fixes from the
22825 Tor 0.2.5 alpha release series.
22828 - Clients now look at the "usecreatefast" consensus parameter to
22829 decide whether to use CREATE_FAST or CREATE cells for the first hop
22830 of their circuit. This approach can improve security on connections
22831 where Tor's circuit handshake is stronger than the available TLS
22832 connection security levels, but the tradeoff is more computational
22833 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22834 - Make the number of entry guards configurable via a new
22835 NumEntryGuards consensus parameter, and the number of directory
22836 guards configurable via a new NumDirectoryGuards consensus
22837 parameter. Implements ticket 12688.
22840 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22841 implementation that caused incorrect results on 32-bit
22842 implementations when certain malformed inputs were used along with
22843 a small class of private ntor keys. This bug does not currently
22844 appear to allow an attacker to learn private keys or impersonate a
22845 Tor server, but it could provide a means to distinguish 32-bit Tor
22846 implementations from 64-bit Tor implementations. Fixes bug 12694;
22847 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22851 - Warn and drop the circuit if we receive an inbound 'relay early'
22852 cell. Those used to be normal to receive on hidden service circuits
22853 due to bug 1038, but the buggy Tor versions are long gone from
22854 the network so we can afford to resume watching for them. Resolves
22855 the rest of bug 1038; bugfix on 0.2.1.19.
22856 - Correct a confusing error message when trying to extend a circuit
22857 via the control protocol but we don't know a descriptor or
22858 microdescriptor for one of the specified relays. Fixes bug 12718;
22859 bugfix on 0.2.3.1-alpha.
22860 - Avoid an illegal read from stack when initializing the TLS
22861 module using a version of OpenSSL without all of the ciphers
22862 used by the v2 link handshake. Fixes bug 12227; bugfix on
22863 0.2.4.8-alpha. Found by "starlight".
22866 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22870 Changes in version 0.2.5.5-alpha - 2014-06-18
22871 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
22872 0.2.5.x release series, including a couple of DoS issues, some
22873 performance regressions, a large number of bugs affecting the Linux
22874 seccomp2 sandbox code, and various other bugfixes. It also adds
22875 diagnostic bugfixes for a few tricky issues that we're trying to
22878 o Major features (security, traffic analysis resistance):
22879 - Several major improvements to the algorithm used to decide when to
22880 close TLS connections. Previous versions of Tor closed connections
22881 at a fixed interval after the last time a non-padding cell was
22882 sent over the connection, regardless of the target of the
22883 connection. Now, we randomize the intervals by adding up to 50% of
22884 their base value, we measure the length of time since connection
22885 last had at least one circuit, and we allow connections to known
22886 ORs to remain open a little longer (15 minutes instead of 3
22887 minutes minimum). These changes should improve Tor's resistance
22888 against some kinds of traffic analysis, and lower some overhead
22889 from needlessly closed connections. Fixes ticket 6799.
22890 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
22892 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
22893 - Fix a memory leak that could occur if a microdescriptor parse
22894 fails during the tokenizing step. This bug could enable a memory
22895 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22898 o Major bugfixes (security, directory authorities):
22899 - Directory authorities now include a digest of each relay's
22900 identity key as a part of its microdescriptor.
22902 This is a workaround for bug 11743 (reported by "cypherpunks"),
22903 where Tor clients do not support receiving multiple
22904 microdescriptors with the same SHA256 digest in the same
22905 consensus. When clients receive a consensus like this, they only
22906 use one of the relays. Without this fix, a hostile relay could
22907 selectively disable some client use of target relays by
22908 constructing a router descriptor with a different identity and the
22909 same microdescriptor parameters and getting the authorities to
22910 list it in a microdescriptor consensus. This fix prevents an
22911 attacker from causing a microdescriptor collision, because the
22912 router's identity is not forgeable.
22914 o Major bugfixes (relay):
22915 - Use a direct dirport connection when uploading non-anonymous
22916 descriptors to the directory authorities. Previously, relays would
22917 incorrectly use tunnel connections under a fairly wide variety of
22918 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
22919 - When a circuit accidentally has the same circuit ID for its
22920 forward and reverse direction, correctly detect the direction of
22921 cells using that circuit. Previously, this bug made roughly one
22922 circuit in a million non-functional. Fixes bug 12195; this is a
22923 bugfix on every version of Tor.
22925 o Major bugfixes (client, pluggable transports):
22926 - When managing pluggable transports, use OS notification facilities
22927 to learn if they have crashed, and don't attempt to kill any
22928 process that has already exited. Fixes bug 8746; bugfix
22931 o Minor features (diagnostic):
22932 - When logging a warning because of bug 7164, additionally check the
22933 hash table for consistency (as proposed on ticket 11737). This may
22934 help diagnose bug 7164.
22935 - When we log a heartbeat, log how many one-hop circuits we have
22936 that are at least 30 minutes old, and log status information about
22937 a few of them. This is an attempt to track down bug 8387.
22938 - When encountering an unexpected CR while writing text to a file on
22939 Windows, log the name of the file. Should help diagnosing
22941 - Give more specific warnings when a client notices that an onion
22942 handshake has failed. Fixes ticket 9635.
22943 - Add significant new logging code to attempt to diagnose bug 12184,
22944 where relays seem to run out of available circuit IDs.
22945 - Improve the diagnostic log message for bug 8387 even further to
22946 try to improve our odds of figuring out why one-hop directory
22947 circuits sometimes do not get closed.
22949 o Minor features (security, memory management):
22950 - Memory allocation tricks (mempools and buffer freelists) are now
22951 disabled by default. You can turn them back on with
22952 --enable-mempools and --enable-buf-freelists respectively. We're
22953 disabling these features because malloc performance is good enough
22954 on most platforms, and a similar feature in OpenSSL exacerbated
22955 exploitation of the Heartbleed attack. Resolves ticket 11476.
22957 o Minor features (security):
22958 - Apply the secure SipHash-2-4 function to the hash table mapping
22959 circuit IDs and channels to circuits. We missed this one when we
22960 were converting all the other hash functions to use SipHash back
22961 in 0.2.5.3-alpha. Resolves ticket 11750.
22963 o Minor features (build):
22964 - The configure script has a --disable-seccomp option to turn off
22965 support for libseccomp on systems that have it, in case it (or
22966 Tor's use of it) is broken. Resolves ticket 11628.
22968 o Minor features (other):
22969 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
22972 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
22973 - When running a hidden service, do not allow TunneledDirConns 0;
22974 this will keep the hidden service from running, and also
22975 make it publish its descriptors directly over HTTP. Fixes bug 10849;
22976 bugfix on 0.2.1.1-alpha.
22978 o Minor bugfixes (performance):
22979 - Avoid a bug where every successful connection made us recompute
22980 the flag telling us whether we have sufficient information to
22981 build circuits. Previously, we would forget our cached value
22982 whenever we successfully opened a channel (or marked a router as
22983 running or not running for any other reason), regardless of
22984 whether we had previously believed the router to be running. This
22985 forced us to run an expensive update operation far too often.
22986 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
22987 - Avoid using tor_memeq() for checking relay cell integrity. This
22988 removes a possible performance bottleneck. Fixes part of bug
22989 12169; bugfix on 0.2.1.31.
22991 o Minor bugfixes (compilation):
22992 - Fix compilation of test_status.c when building with MVSC. Bugfix
22993 on 0.2.5.4-alpha. Patch from Gisle Vanem.
22994 - Resolve GCC complaints on OpenBSD about discarding constness in
22995 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
22996 on 0.1.1.23. Patch from Dana Koch.
22997 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
22998 treatment of long and time_t as comparable types. Fixes part of
22999 bug 11633. Patch from Dana Koch.
23000 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
23001 11623; bugfix on 0.2.5.3-alpha.
23002 - When deciding whether to build the 64-bit curve25519
23003 implementation, detect platforms where we can compile 128-bit
23004 arithmetic but cannot link it. Fixes bug 11729; bugfix on
23005 0.2.4.8-alpha. Patch from "conradev".
23006 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
23007 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
23008 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
23011 o Minor bugfixes (Directory server):
23012 - When sending a compressed set of descriptors or microdescriptors,
23013 make sure to finalize the zlib stream. Previously, we would write
23014 all the compressed data, but if the last descriptor we wanted to
23015 send was missing or too old, we would not mark the stream as
23016 finished. This caused problems for decompression tools. Fixes bug
23017 11648; bugfix on 0.1.1.23.
23019 o Minor bugfixes (Linux seccomp sandbox):
23020 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
23021 11622; bugfix on 0.2.5.1-alpha.
23022 - Avoid crashing when re-opening listener ports with the seccomp
23023 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
23024 - Avoid crashing with the seccomp sandbox enabled along with
23025 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
23026 - When we receive a SIGHUP with the sandbox enabled, correctly
23027 support rotating our log files. Fixes bug 12032; bugfix
23029 - Avoid crash when running with sandboxing enabled and
23030 DirReqStatistics not disabled. Fixes bug 12035; bugfix
23032 - Fix a "BUG" warning when trying to write bridge-stats files with
23033 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
23035 - Prevent the sandbox from crashing on startup when run with the
23036 --enable-expensive-hardening configuration option. Fixes bug
23037 11477; bugfix on 0.2.5.4-alpha.
23038 - When running with DirPortFrontPage and sandboxing both enabled,
23039 reload the DirPortFrontPage correctly when restarting. Fixes bug
23040 12028; bugfix on 0.2.5.1-alpha.
23041 - Don't try to enable the sandbox when using the Tor binary to check
23042 its configuration, hash a passphrase, or so on. Doing so was
23043 crashing on startup for some users. Fixes bug 11609; bugfix
23045 - Avoid warnings when running with sandboxing and node statistics
23046 enabled at the same time. Fixes part of 12064; bugfix on
23047 0.2.5.1-alpha. Patch from Michael Wolf.
23048 - Avoid warnings when running with sandboxing enabled at the same
23049 time as cookie authentication, hidden services, or directory
23050 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
23051 - Do not allow options that require calls to exec to be enabled
23052 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
23053 bug 12043; bugfix on 0.2.5.1-alpha.
23054 - Handle failures in getpwnam()/getpwuid() when running with the
23055 User option set and the Linux syscall sandbox enabled. Fixes bug
23056 11946; bugfix on 0.2.5.1-alpha.
23057 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
23058 to avoid calling getaddrinfo() after installing the sandbox
23059 filters. Previously, it preloaded a cache with the IPv4 address
23060 for our hostname, and nothing else. Now, it loads the cache with
23061 every address that it used to initialize the Tor process. Fixes
23062 bug 11970; bugfix on 0.2.5.1-alpha.
23064 o Minor bugfixes (pluggable transports):
23065 - Enable the ExtORPortCookieAuthFile option, to allow changing the
23066 default location of the authentication token for the extended OR
23067 Port as used by sever-side pluggable transports. We had
23068 implemented this option before, but the code to make it settable
23069 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
23070 - Avoid another 60-second delay when starting Tor in a pluggable-
23071 transport-using configuration when we already have cached
23072 descriptors for our bridges. Fixes bug 11965; bugfix
23075 o Minor bugfixes (client):
23076 - Avoid "Tried to open a socket with DisableNetwork set" warnings
23077 when starting a client with bridges configured and DisableNetwork
23078 set. (Tor launcher starts Tor with DisableNetwork set the first
23079 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
23081 o Minor bugfixes (testing):
23082 - The Python parts of the test scripts now work on Python 3 as well
23083 as Python 2, so systems where '/usr/bin/python' is Python 3 will
23084 no longer have the tests break. Fixes bug 11608; bugfix
23086 - When looking for versions of python that we could run the tests
23087 with, check for "python2.7" and "python3.3"; previously we were
23088 only looking for "python", "python2", and "python3". Patch from
23089 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
23090 - Fix all valgrind warnings produced by the unit tests. There were
23091 over a thousand memory leak warnings previously, mostly produced
23092 by forgetting to free things in the unit test code. Fixes bug
23093 11618, bugfixes on many versions of Tor.
23095 o Minor bugfixes (tor-fw-helper):
23096 - Give a correct log message when tor-fw-helper fails to launch.
23097 (Previously, we would say something like "tor-fw-helper sent us a
23098 string we could not parse".) Fixes bug 9781; bugfix
23101 o Minor bugfixes (relay, threading):
23102 - Check return code on spawn_func() in cpuworker code, so that we
23103 don't think we've spawned a nonworking cpuworker and write junk to
23104 it forever. Fix related to bug 4345; bugfix on all released Tor
23105 versions. Found by "skruffy".
23106 - Use a pthread_attr to make sure that spawn_func() cannot return an
23107 error while at the same time launching a thread. Fix related to
23108 bug 4345; bugfix on all released Tor versions. Reported
23111 o Minor bugfixes (relay, oom prevention):
23112 - Correctly detect the total available system memory. We tried to do
23113 this in 0.2.5.4-alpha, but the code was set up to always return an
23114 error value, even on success. Fixes bug 11805; bugfix
23117 o Minor bugfixes (relay, other):
23118 - We now drop CREATE cells for already-existent circuit IDs and for
23119 zero-valued circuit IDs, regardless of other factors that might
23120 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
23122 - Avoid an illegal read from stack when initializing the TLS module
23123 using a version of OpenSSL without all of the ciphers used by the
23124 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
23126 - When rejecting DATA cells for stream_id zero, still count them
23127 against the circuit's deliver window so that we don't fail to send
23128 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
23130 o Minor bugfixes (logging):
23131 - Fix a misformatted log message about delayed directory fetches.
23132 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
23133 - Squelch a spurious LD_BUG message "No origin circuit for
23134 successful SOCKS stream" in certain hidden service failure cases;
23138 - Include a tor.service file in contrib/dist for use with systemd.
23139 Some distributions will be able to use this file unmodified;
23140 others will need to tweak it, or write their own. Patch from Jamie
23141 Nguyen; resolves ticket 8368.
23144 - Clean up several option names in the manpage to match their real
23145 names, add the missing documentation for a couple of testing and
23146 directory authority options, remove the documentation for a
23147 V2-directory fetching option that no longer exists. Resolves
23149 - Correct the documentation so that it lists the correct directory
23150 for the stats files. (They are in a subdirectory called "stats",
23152 - In the manpage, move more authority-only options into the
23153 directory authority section so that operators of regular directory
23154 caches don't get confused.
23157 - The contrib directory has been sorted and tidied. Before, it was
23158 an unsorted dumping ground for useful and not-so-useful things.
23159 Now, it is divided based on functionality, and the items which
23160 seemed to be nonfunctional or useless have been removed. Resolves
23161 ticket 8966; based on patches from "rl1987".
23164 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
23165 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
23166 - The TunnelDirConns and PreferTunnelledDirConns options no longer
23167 exist; tunneled directory connections have been available since
23168 0.1.2.5-alpha, and turning them off is not a good idea. This is a
23169 brute-force fix for 10849, where "TunnelDirConns 0" would break
23173 Changes in version 0.2.4.22 - 2014-05-16
23174 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
23175 alpha release series. These include blocking all authority signing
23176 keys that may have been affected by the OpenSSL "heartbleed" bug,
23177 choosing a far more secure set of TLS ciphersuites by default, closing
23178 a couple of memory leaks that could be used to run a target relay out
23179 of RAM, and several others.
23181 o Major features (security, backport from 0.2.5.4-alpha):
23182 - Block authority signing keys that were used on authorities
23183 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
23184 don't have any evidence that these keys _were_ compromised; we're
23185 doing this to be prudent.) Resolves ticket 11464.
23187 o Major bugfixes (security, OOM):
23188 - Fix a memory leak that could occur if a microdescriptor parse
23189 fails during the tokenizing step. This bug could enable a memory
23190 exhaustion attack by directory servers. Fixes bug 11649; bugfix
23193 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
23194 - The relay ciphersuite list is now generated automatically based on
23195 uniform criteria, and includes all OpenSSL ciphersuites with
23196 acceptable strength and forward secrecy. Previously, we had left
23197 some perfectly fine ciphersuites unsupported due to omission or
23198 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
23199 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
23200 - Relays now trust themselves to have a better view than clients of
23201 which TLS ciphersuites are better than others. (Thanks to bug
23202 11513, the relay list is now well-considered, whereas the client
23203 list has been chosen mainly for anti-fingerprinting purposes.)
23204 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
23205 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
23206 AES128. Resolves ticket 11528.
23207 - Clients now try to advertise the same list of ciphersuites as
23208 Firefox 28. This change enables selection of (fast) GCM
23209 ciphersuites, disables some strange old ciphers, and stops
23210 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
23211 Resolves ticket 11438.
23213 o Minor bugfixes (configuration, security):
23214 - When running a hidden service, do not allow TunneledDirConns 0:
23215 trying to set that option together with a hidden service would
23216 otherwise prevent the hidden service from running, and also make
23217 it publish its descriptors directly over HTTP. Fixes bug 10849;
23218 bugfix on 0.2.1.1-alpha.
23220 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
23221 - Avoid sending a garbage value to the controller when a circuit is
23222 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
23224 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
23225 - Stop leaking memory when we successfully resolve a PTR record.
23226 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
23228 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
23229 - Avoid 60-second delays in the bootstrapping process when Tor is
23230 launching for a second time while using bridges. Fixes bug 9229;
23231 bugfix on 0.2.0.3-alpha.
23233 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
23234 - Give the correct URL in the warning message when trying to run a
23235 relay on an ancient version of Windows. Fixes bug 9393.
23237 o Minor bugfixes (compilation):
23238 - Fix a compilation error when compiling with --disable-curve25519.
23239 Fixes bug 9700; bugfix on 0.2.4.17-rc.
23242 - Downgrade the warning severity for the the "md was still
23243 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
23244 for trying to diagnose this bug, and the current warning in
23245 earlier versions of tor achieves nothing useful. Addresses warning
23248 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
23249 - When we run out of usable circuit IDs on a channel, log only one
23250 warning for the whole channel, and describe how many circuits
23251 there were on the channel. Fixes part of ticket 11553.
23253 o Minor features (security, backport from 0.2.5.4-alpha):
23254 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
23255 leave the default at 8GBytes), to better support Raspberry Pi
23256 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
23258 o Documentation (backport from 0.2.5.4-alpha):
23259 - Correctly document that we search for a system torrc file before
23260 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
23264 Changes in version 0.2.5.4-alpha - 2014-04-25
23265 Tor 0.2.5.4-alpha includes several security and performance
23266 improvements for clients and relays, including blacklisting authority
23267 signing keys that were used while susceptible to the OpenSSL
23268 "heartbleed" bug, fixing two expensive functions on busy relays,
23269 improved TLS ciphersuite preference lists, support for run-time
23270 hardening on compilers that support AddressSanitizer, and more work on
23271 the Linux sandbox code.
23273 There are also several usability fixes for clients (especially clients
23274 that use bridges), two new TransPort protocols supported (one on
23275 OpenBSD, one on FreeBSD), and various other bugfixes.
23277 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
23278 have accumulated many known flaws; everyone should upgrade.
23280 o Major features (security):
23281 - If you don't specify MaxMemInQueues yourself, Tor now tries to
23282 pick a good value based on your total system memory. Previously,
23283 the default was always 8 GB. You can still override the default by
23284 setting MaxMemInQueues yourself. Resolves ticket 11396.
23285 - Block authority signing keys that were used on authorities
23286 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
23287 don't have any evidence that these keys _were_ compromised; we're
23288 doing this to be prudent.) Resolves ticket 11464.
23290 o Major features (relay performance):
23291 - Speed up server-side lookups of rendezvous and introduction point
23292 circuits by using hashtables instead of linear searches. These
23293 functions previously accounted between 3 and 7% of CPU usage on
23294 some busy relays. Resolves ticket 9841.
23295 - Avoid wasting CPU when extending a circuit over a channel that is
23296 nearly out of circuit IDs. Previously, we would do a linear scan
23297 over possible circuit IDs before finding one or deciding that we
23298 had exhausted our possibilities. Now, we try at most 64 random
23299 circuit IDs before deciding that we probably won't succeed. Fixes
23300 a possible root cause of ticket 11553.
23302 o Major features (seccomp2 sandbox, Linux only):
23303 - The seccomp2 sandbox can now run a test network for multiple hours
23304 without crashing. The sandbox is still experimental, and more bugs
23305 will probably turn up. To try it, enable "Sandbox 1" on a Linux
23306 host. Resolves ticket 11351.
23307 - Strengthen sandbox code: the sandbox can now test the arguments
23308 for rename(), and blocks _sysctl() entirely. Resolves another part
23310 - When the sandbox blocks a system call, it now tries to log a stack
23311 trace before exiting. Resolves ticket 11465.
23313 o Major bugfixes (TLS cipher selection):
23314 - The relay ciphersuite list is now generated automatically based on
23315 uniform criteria, and includes all OpenSSL ciphersuites with
23316 acceptable strength and forward secrecy. Previously, we had left
23317 some perfectly fine ciphersuites unsupported due to omission or
23318 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
23319 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
23320 - Relays now trust themselves to have a better view than clients of
23321 which TLS ciphersuites are better than others. (Thanks to bug
23322 11513, the relay list is now well-considered, whereas the client
23323 list has been chosen mainly for anti-fingerprinting purposes.)
23324 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
23325 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
23326 AES128. Resolves ticket 11528.
23327 - Clients now try to advertise the same list of ciphersuites as
23328 Firefox 28. This change enables selection of (fast) GCM
23329 ciphersuites, disables some strange old ciphers, and stops
23330 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
23331 Resolves ticket 11438.
23333 o Major bugfixes (bridge client):
23334 - Avoid 60-second delays in the bootstrapping process when Tor is
23335 launching for a second time while using bridges. Fixes bug 9229;
23336 bugfix on 0.2.0.3-alpha.
23338 o Minor features (transparent proxy, *BSD):
23339 - Support FreeBSD's ipfw firewall interface for TransPort ports on
23340 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
23341 10267; patch from "yurivict".
23342 - Support OpenBSD's divert-to rules with the pf firewall for
23343 transparent proxy ports. To enable it, set "TransProxyType
23344 pf-divert". This allows Tor to run a TransPort transparent proxy
23345 port on OpenBSD 4.4 or later without root privileges. See the
23346 pf.conf(5) manual page for information on configuring pf to use
23347 divert-to rules. Closes ticket 10896; patch from Dana Koch.
23349 o Minor features (security):
23350 - New --enable-expensive-hardening option to enable security
23351 hardening options that consume nontrivial amounts of CPU and
23352 memory. Right now, this includes AddressSanitizer and UbSan, which
23353 are supported in newer versions of GCC and Clang. Closes ticket
23356 o Minor features (log verbosity):
23357 - Demote the message that we give when a flushing connection times
23358 out for too long from NOTICE to INFO. It was usually meaningless.
23359 Resolves ticket 5286.
23360 - Don't log so many notice-level bootstrapping messages at startup
23361 about downloading descriptors. Previously, we'd log a notice
23362 whenever we learned about more routers. Now, we only log a notice
23363 at every 5% of progress. Fixes bug 9963.
23364 - Warn less verbosely when receiving a malformed
23365 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
23366 - When we run out of usable circuit IDs on a channel, log only one
23367 warning for the whole channel, and describe how many circuits
23368 there were on the channel. Fixes part of ticket 11553.
23370 o Minor features (relay):
23371 - If a circuit timed out for at least 3 minutes, check if we have a
23372 new external IP address, and publish a new descriptor with the new
23373 IP address if it changed. Resolves ticket 2454.
23375 o Minor features (controller):
23376 - Make the entire exit policy available from the control port via
23377 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
23379 - Because of the fix for ticket 11396, the real limit for memory
23380 usage may no longer match the configured MaxMemInQueues value. The
23381 real limit is now exposed via GETINFO limits/max-mem-in-queues.
23383 o Minor features (bridge client):
23384 - Report a more useful failure message when we can't connect to a
23385 bridge because we don't have the right pluggable transport
23386 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
23388 o Minor features (diagnostic):
23389 - Add more log messages to diagnose bug 7164, which causes
23390 intermittent "microdesc_free() called but md was still referenced"
23391 warnings. We now include more information, to figure out why we
23392 might be cleaning a microdescriptor for being too old if it's
23393 still referenced by a live node_t object.
23395 o Minor bugfixes (client, DNSPort):
23396 - When using DNSPort, try to respond to AAAA requests with AAAA
23397 answers. Previously, we hadn't looked at the request type when
23398 deciding which answer type to prefer. Fixes bug 10468; bugfix on
23400 - When receiving a DNS query for an unsupported record type, reply
23401 with no answer rather than with a NOTIMPL error. This behavior
23402 isn't correct either, but it will break fewer client programs, we
23403 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
23406 o Minor bugfixes (exit relay):
23407 - Stop leaking memory when we successfully resolve a PTR record.
23408 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
23410 o Minor bugfixes (bridge client):
23411 - Stop accepting bridge lines containing hostnames. Doing so would
23412 cause clients to perform DNS requests on the hostnames, which was
23413 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
23414 - Avoid a 60-second delay in the bootstrapping process when a Tor
23415 client with pluggable transports re-reads its configuration at
23416 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
23418 o Minor bugfixes (client, logging during bootstrap):
23419 - Warn only once if we start logging in an unsafe way. Previously,
23420 we complain as many times as we had problems. Fixes bug 9870;
23421 bugfix on 0.2.5.1-alpha.
23422 - Only report the first fatal bootstrap error on a given OR
23423 connection. This stops us from telling the controller bogus error
23424 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
23425 - Be more helpful when trying to run sandboxed on Linux without
23426 libseccomp. Instead of saying "Sandbox is not implemented on this
23427 platform", we now explain that we need to be built with
23428 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
23429 - Avoid generating spurious warnings when starting with
23430 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
23433 o Minor bugfixes (closing OR connections):
23434 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
23435 check if it's an or_connection_t and correctly call
23436 connection_or_close_for_error() rather than
23437 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
23439 - When closing all connections on setting DisableNetwork to 1, use
23440 connection_or_close_normally() rather than closing OR connections
23441 out from under the channel layer. Fixes bug 11306; bugfix on
23444 o Minor bugfixes (controller):
23445 - Avoid sending a garbage value to the controller when a circuit is
23446 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
23448 o Minor bugfixes (tor-fw-helper):
23449 - Allow tor-fw-helper to build again by adding src/ext to its
23450 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
23452 o Minor bugfixes (bridges):
23453 - Avoid potential crashes or bad behavior when launching a
23454 server-side managed proxy with ORPort or ExtORPort temporarily
23455 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
23457 o Minor bugfixes (platform-specific):
23458 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
23459 bug 11426; bugfix on 0.2.5.3-alpha.
23460 - When dumping a malformed directory object to disk, save it in
23461 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
23463 - Don't report failures from make_socket_reuseable() on incoming
23464 sockets on OSX: this can happen when incoming connections close
23465 early. Fixes bug 10081.
23467 o Minor bugfixes (trivial memory leaks):
23468 - Fix a small memory leak when signing a directory object. Fixes bug
23469 11275; bugfix on 0.2.4.13-alpha.
23470 - Free placeholder entries in our circuit table at exit; fixes a
23471 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
23472 - Don't re-initialize a second set of OpenSSL mutexes when starting
23473 up. Previously, we'd make one set of mutexes, and then immediately
23474 replace them with another. Fixes bug 11726; bugfix on
23476 - Resolve some memory leaks found by coverity in the unit tests, on
23477 exit in tor-gencert, and on a failure to compute digests for our
23478 own keys when generating a v3 networkstatus vote. These leaks
23479 should never have affected anyone in practice.
23481 o Minor bugfixes (hidden service):
23482 - Only retry attempts to connect to a chosen rendezvous point 8
23483 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
23485 o Minor bugfixes (misc code correctness):
23486 - Fix various instances of undefined behavior in channeltls.c,
23487 tor_memmem(), and eventdns.c that would cause us to construct
23488 pointers to memory outside an allocated object. (These invalid
23489 pointers were not accessed, but C does not even allow them to
23490 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
23491 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
23492 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
23493 fix some miscellaneous errors in our tests and codebase. Fixes bug
23494 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
23495 - Always check return values for unlink, munmap, UnmapViewOfFile;
23496 check strftime return values more often. In some cases all we can
23497 do is report a warning, but this may help prevent deeper bugs from
23498 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
23500 - Fix numerous warnings from the clang "scan-build" static analyzer.
23501 Some of these are programming style issues; some of them are false
23502 positives that indicated awkward code; some are undefined behavior
23503 cases related to constructing (but not using) invalid pointers;
23504 some are assumptions about API behavior; some are (harmlessly)
23505 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
23506 correct; and one or two are genuine bugs that weren't reachable
23507 from the rest of the program. Fixes bug 8793; bugfixes on many,
23511 - Build the torify.1 manpage again. Previously, we were only trying
23512 to build it when also building tor-fw-helper. That's why we didn't
23513 notice that we'd broken the ability to build it. Fixes bug 11321;
23514 bugfix on 0.2.5.1-alpha.
23515 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
23516 11061; bugfix on 0.2.4.7-alpha.
23517 - Correctly document that we search for a system torrc file before
23518 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
23520 - Resolve warnings from Doxygen.
23522 o Code simplifications and refactoring:
23523 - Remove is_internal_IP() function. Resolves ticket 4645.
23524 - Remove unused function circuit_dump_by_chan from circuitlist.c.
23525 Closes issue 9107; patch from "marek".
23526 - Change our use of the ENUM_BF macro to avoid declarations that
23529 o Deprecated versions:
23530 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
23531 attention for some while. Directory authorities no longer accept
23532 descriptors from relays running any version of Tor prior to Tor
23533 0.2.3.16-alpha. Resolves ticket 11149.
23536 - New macros in test.h to simplify writing mock-functions for unit
23537 tests. Part of ticket 11507. Patch from Dana Koch.
23538 - Complete tests for the status.c module. Resolves ticket 11507.
23539 Patch from Dana Koch.
23542 - Remove all code for the long unused v1 directory protocol.
23543 Resolves ticket 11070.
23546 Changes in version 0.2.5.3-alpha - 2014-03-22
23547 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
23548 two new anti-DoS features for Tor relays, resolves a bug that kept
23549 SOCKS5 support for IPv6 from working, fixes several annoying usability
23550 issues for bridge users, and removes more old code for unused
23553 The Tor 0.2.5.x release series is now in patch-freeze: no feature
23554 patches not already written will be considered for inclusion in 0.2.5.x.
23556 o Major features (relay security, DoS-resistance):
23557 - When deciding whether we have run out of memory and we need to
23558 close circuits, also consider memory allocated in buffers for
23559 streams attached to each circuit.
23561 This change, which extends an anti-DoS feature introduced in
23562 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
23563 better resist more memory-based DoS attacks than before. Since the
23564 MaxMemInCellQueues option now applies to all queues, it is renamed
23565 to MaxMemInQueues. This feature fixes bug 10169.
23566 - Avoid hash-flooding denial-of-service attacks by using the secure
23567 SipHash-2-4 hash function for our hashtables. Without this
23568 feature, an attacker could degrade performance of a targeted
23569 client or server by flooding their data structures with a large
23570 number of entries to be stored at the same hash table position,
23571 thereby slowing down the Tor instance. With this feature, hash
23572 table positions are derived from a randomized cryptographic key,
23573 and an attacker cannot predict which entries will collide. Closes
23575 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
23576 the default at 8GBytes), to better support Raspberry Pi users. Fixes
23577 bug 9686; bugfix on 0.2.4.14-alpha.
23579 o Minor features (bridges, pluggable transports):
23580 - Bridges now write the SHA1 digest of their identity key
23581 fingerprint (that is, a hash of a hash of their public key) to
23582 notice-level logs, and to a new hashed-fingerprint file. This
23583 information will help bridge operators look up their bridge in
23584 Globe and similar tools. Resolves ticket 10884.
23585 - Improve the message that Tor displays when running as a bridge
23586 using pluggable transports without an Extended ORPort listener.
23587 Also, log the message in the log file too. Resolves ticket 11043.
23589 o Minor features (other):
23590 - Add a new option, PredictedPortsRelevanceTime, to control how long
23591 after having received a request to connect to a given port Tor
23592 will try to keep circuits ready in anticipation of future requests
23593 for that port. Patch from "unixninja92"; implements ticket 9176.
23594 - Generate a warning if any ports are listed in the SocksPolicy,
23595 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
23596 AuthDirBadExit options. (These options only support address
23597 ranges.) Fixes part of ticket 11108.
23598 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
23601 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
23602 - Build without warnings under clang 3.4. (We have some macros that
23603 define static functions only some of which will get used later in
23604 the module. Starting with clang 3.4, these give a warning unless the
23605 unused attribute is set on them.) Resolves ticket 10904.
23606 - Fix build warnings about missing "a2x" comment when building the
23607 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23608 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23610 o Minor bugfixes (client):
23611 - Improve the log message when we can't connect to a hidden service
23612 because all of the hidden service directory nodes hosting its
23613 descriptor are excluded. Improves on our fix for bug 10722, which
23614 was a bugfix on 0.2.0.10-alpha.
23615 - Raise a control port warning when we fail to connect to all of
23616 our bridges. Previously, we didn't inform the controller, and
23617 the bootstrap process would stall. Fixes bug 11069; bugfix on
23619 - Exit immediately when a process-owning controller exits.
23620 Previously, tor relays would wait for a little while after their
23621 controller exited, as if they had gotten an INT signal -- but this
23622 was problematic, since there was no feedback for the user. To do a
23623 clean shutdown, controllers should send an INT signal and give Tor
23624 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
23625 - Stop attempting to connect to bridges before our pluggable
23626 transports are configured (harmless but resulted in some erroneous
23627 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
23628 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
23629 generating incorrect SOCKS5 responses, and confusing client
23630 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
23632 o Minor bugfixes (relays and bridges):
23633 - Avoid crashing on a malformed resolv.conf file when running a
23634 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
23635 - Non-exit relays no longer launch mock DNS requests to check for
23636 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
23637 non-exit relays stopped servicing DNS requests. Fixes bug 965;
23638 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
23639 - Bridges now report complete directory request statistics. Related
23640 to bug 5824; bugfix on 0.2.2.1-alpha.
23641 - Bridges now never collect statistics that were designed for
23642 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
23643 - Stop giving annoying warning messages when we decide not to launch
23644 a pluggable transport proxy that we don't need (because there are
23645 no bridges configured to use it). Resolves ticket 5018; bugfix
23647 - Give the correct URL in the warning message when trying to run a
23648 relay on an ancient version of Windows. Fixes bug 9393.
23650 o Minor bugfixes (backtrace support):
23651 - Support automatic backtraces on more platforms by using the
23652 "-fasynchronous-unwind-tables" compiler option. This option is
23653 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
23654 is on by default and table generation is not. This doesn't yet
23655 add Windows support; only Linux, OSX, and some BSDs are affected.
23656 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
23657 - Avoid strange behavior if two threads hit failed assertions at the
23658 same time and both try to log backtraces at once. (Previously, if
23659 this had happened, both threads would have stored their intermediate
23660 results in the same buffer, and generated junk outputs.) Reported by
23661 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
23662 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
23663 0.2.5.2-alpha; patch from Nick Hopper.
23665 o Minor bugfixes (unit tests):
23666 - Fix a small bug in the unit tests that might have made the tests
23667 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
23668 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
23671 - Remove all remaining code related to version-0 hidden service
23672 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
23673 the rest of bug 10841.
23676 - Document in the manpage that "KBytes" may also be written as
23677 "kilobytes" or "KB", that "Kbits" may also be written as
23678 "kilobits", and so forth. Closes ticket 9222.
23679 - Document that the ClientOnly config option overrides ORPort.
23680 Our old explanation made ClientOnly sound as though it did
23681 nothing at all. Resolves bug 9059.
23682 - Explain that SocksPolicy, DirPolicy, and similar options don't
23683 take port arguments. Fixes the other part of ticket 11108.
23684 - Fix a comment about the rend_server_descriptor_t.protocols field
23685 to more accurately describe its range. Also, make that field
23686 unsigned, to more accurately reflect its usage. Fixes bug 9099;
23687 bugfix on 0.2.1.5-alpha.
23688 - Fix the manpage's description of HiddenServiceAuthorizeClient:
23689 the maximum client name length is 16, not 19. Fixes bug 11118;
23690 bugfix on 0.2.1.6-alpha.
23692 o Code simplifications and refactoring:
23693 - Get rid of router->address, since in all cases it was just the
23694 string representation of router->addr. Resolves ticket 5528.
23696 o Test infrastructure:
23697 - Update to the latest version of tinytest.
23698 - Improve the tinytest implementation of string operation tests so
23699 that comparisons with NULL strings no longer crash the tests; they
23700 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
23703 Changes in version 0.2.4.21 - 2014-02-28
23704 Tor 0.2.4.21 further improves security against potential adversaries who
23705 find breaking 1024-bit crypto doable, and backports several stability
23706 and robustness patches from the 0.2.5 branch.
23708 o Major features (client security):
23709 - When we choose a path for a 3-hop circuit, make sure it contains
23710 at least one relay that supports the NTor circuit extension
23711 handshake. Otherwise, there is a chance that we're building
23712 a circuit that's worth attacking by an adversary who finds
23713 breaking 1024-bit crypto doable, and that chance changes the game
23714 theory. Implements ticket 9777.
23717 - Do not treat streams that fail with reason
23718 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23719 since it could also indicate an ENETUNREACH connection error. Fixes
23720 part of bug 10777; bugfix on 0.2.4.8-alpha.
23722 o Code simplification and refactoring:
23723 - Remove data structures which were introduced to implement the
23724 CellStatistics option: they are now redundant with the new timestamp
23725 field in the regular packed_cell_t data structure, which we did
23726 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
23729 - Always clear OpenSSL bignums before freeing them -- even bignums
23730 that don't contain secrets. Resolves ticket 10793. Patch by
23732 - Build without warnings under clang 3.4. (We have some macros that
23733 define static functions only some of which will get used later in
23734 the module. Starting with clang 3.4, these give a warning unless the
23735 unused attribute is set on them.) Resolves ticket 10904.
23736 - Update geoip and geoip6 files to the February 7 2014 Maxmind
23737 GeoLite2 Country database.
23740 - Set the listen() backlog limit to the largest actually supported
23741 on the system, not to the value in a header file. Fixes bug 9716;
23742 bugfix on every released Tor.
23743 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23744 exit node as a NOROUTE error, not an INTERNAL error, since they
23745 can apparently happen when trying to connect to the wrong sort
23746 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23747 - Fix build warnings about missing "a2x" comment when building the
23748 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23749 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23750 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23751 not entirely remove it from the connection lists. Fixes bug 9602;
23752 bugfix on 0.2.4.4-alpha.
23753 - Fix a segmentation fault in our benchmark code when running with
23754 Fedora's OpenSSL package, or any other OpenSSL that provides
23755 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23756 - Turn "circuit handshake stats since last time" log messages into a
23757 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23759 o Documentation fixes:
23760 - Document that all but one DirPort entry must have the NoAdvertise
23761 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23764 Changes in version 0.2.5.2-alpha - 2014-02-13
23765 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
23766 like the "poor random number generation" fix and the "building too many
23767 circuits" fix. It also further improves security against potential
23768 adversaries who find breaking 1024-bit crypto doable, and launches
23769 pluggable transports on demand (which gets us closer to integrating
23770 pluggable transport support by default -- not to be confused with Tor
23771 bundles enabling pluggable transports and bridges by default).
23773 o Major features (client security):
23774 - When we choose a path for a 3-hop circuit, make sure it contains
23775 at least one relay that supports the NTor circuit extension
23776 handshake. Otherwise, there is a chance that we're building
23777 a circuit that's worth attacking by an adversary who finds
23778 breaking 1024-bit crypto doable, and that chance changes the game
23779 theory. Implements ticket 9777.
23780 - Clients now look at the "usecreatefast" consensus parameter to
23781 decide whether to use CREATE_FAST or CREATE cells for the first hop
23782 of their circuit. This approach can improve security on connections
23783 where Tor's circuit handshake is stronger than the available TLS
23784 connection security levels, but the tradeoff is more computational
23785 load on guard relays. Implements proposal 221. Resolves ticket 9386.
23787 o Major features (bridges):
23788 - Don't launch pluggable transport proxies if we don't have any
23789 bridges configured that would use them. Now we can list many
23790 pluggable transports, and Tor will dynamically start one when it
23791 hears a bridge address that needs it. Resolves ticket 5018.
23792 - The bridge directory authority now assigns status flags (Stable,
23793 Guard, etc) to bridges based on thresholds calculated over all
23794 Running bridges. Now bridgedb can finally make use of its features
23795 to e.g. include at least one Stable bridge in its answers. Fixes
23798 o Major features (other):
23799 - Extend ORCONN controller event to include an "ID" parameter,
23800 and add four new controller event types CONN_BW, CIRC_BW,
23801 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
23802 The new events are emitted in private Tor networks only, with the
23803 goal of being able to better track performance and load during
23804 full-network simulations. Implements proposal 218 and ticket 7359.
23805 - On some platforms (currently: recent OSX versions, glibc-based
23806 platforms that support the ELF format, and a few other
23807 Unix-like operating systems), Tor can now dump stack traces
23808 when a crash occurs or an assertion fails. By default, traces
23809 are dumped to stderr (if possible) and to any logs that are
23810 reporting errors. Implements ticket 9299.
23813 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23814 not entirely remove it from the connection lists. Fixes bug 9602;
23815 bugfix on 0.2.4.4-alpha.
23816 - Do not treat streams that fail with reason
23817 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23818 since it could also indicate an ENETUNREACH connection error. Fixes
23819 part of bug 10777; bugfix on 0.2.4.8-alpha.
23821 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23822 - Do not allow OpenSSL engines to replace the PRNG, even when
23823 HardwareAccel is set. The only default builtin PRNG engine uses
23824 the Intel RDRAND instruction to replace the entire PRNG, and
23825 ignores all attempts to seed it with more entropy. That's
23826 cryptographically stupid: the right response to a new alleged
23827 entropy source is never to discard all previously used entropy
23828 sources. Fixes bug 10402; works around behavior introduced in
23829 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23831 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23832 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23833 - Avoid launching spurious extra circuits when a stream is pending.
23834 This fixes a bug where any circuit that _wasn't_ unusable for new
23835 streams would be treated as if it were, causing extra circuits to
23836 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23838 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23839 - No longer stop reading or writing on cpuworker connections when
23840 our rate limiting buckets go empty. Now we should handle circuit
23841 handshake requests more promptly. Resolves bug 9731.
23842 - Stop trying to bootstrap all our directory information from
23843 only our first guard. Discovered while fixing bug 9946; bugfix
23846 o Minor features (bridges, pluggable transports):
23847 - Add threshold cutoffs to the networkstatus document created by
23848 the Bridge Authority. Fixes bug 1117.
23849 - On Windows, spawn background processes using the CREATE_NO_WINDOW
23850 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
23851 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
23852 Vidalia set this option for us.) Implements ticket 10297.
23854 o Minor features (security):
23855 - Always clear OpenSSL bignums before freeing them -- even bignums
23856 that don't contain secrets. Resolves ticket 10793. Patch by
23859 o Minor features (config options and command line):
23860 - Add an --allow-missing-torrc commandline option that tells Tor to
23861 run even if the configuration file specified by -f is not available.
23862 Implements ticket 10060.
23863 - Add support for the TPROXY transparent proxying facility on Linux.
23864 See documentation for the new TransProxyType option for more
23865 details. Implementation by "thomo". Closes ticket 10582.
23867 o Minor features (controller):
23868 - Add a new "HS_DESC" controller event that reports activities
23869 related to hidden service descriptors. Resolves ticket 8510.
23870 - New "DROPGUARDS" controller command to forget all current entry
23871 guards. Not recommended for ordinary use, since replacing guards
23872 too frequently makes several attacks easier. Resolves ticket 9934;
23875 o Minor features (build):
23876 - Assume that a user using ./configure --host wants to cross-compile,
23877 and give an error if we cannot find a properly named
23878 tool-chain. Add a --disable-tool-name-check option to proceed
23879 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
23880 - If we run ./configure and the compiler recognizes -fstack-protector
23881 but the linker rejects it, warn the user about a potentially missing
23882 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
23884 o Minor features (testing):
23885 - If Python is installed, "make check" now runs extra tests beyond
23886 the unit test scripts.
23887 - When bootstrapping a test network, sometimes very few relays get
23888 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
23889 specify a set of relays which should be voted Guard regardless of
23890 their uptime or bandwidth. Addresses ticket 9206.
23892 o Minor features (log messages):
23893 - When ServerTransportPlugin is set on a bridge, Tor can write more
23894 useful statistics about bridge use in its extrainfo descriptors,
23895 but only if the Extended ORPort ("ExtORPort") is set too. Add a
23896 log message to inform the user in this case. Resolves ticket 9651.
23897 - When receiving a new controller connection, log the origin address.
23898 Resolves ticket 9698; patch from "sigpipe".
23899 - When logging OpenSSL engine status at startup, log the status of
23900 more engines. Fixes ticket 10043; patch from Joshua Datko.
23901 - Turn "circuit handshake stats since last time" log messages into a
23902 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23904 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23905 - Improve the circuit queue out-of-memory handler. Previously, when
23906 we ran low on memory, we'd close whichever circuits had the most
23907 queued cells. Now, we close those that have the *oldest* queued
23908 cells, on the theory that those are most responsible for us
23909 running low on memory. Based on analysis from a forthcoming paper
23910 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23911 - Generate bootstrapping status update events correctly when fetching
23912 microdescriptors. Fixes bug 9927.
23913 - Update to the October 2 2013 Maxmind GeoLite Country database.
23915 o Minor bugfixes (clients):
23916 - When closing a channel that has already been open, do not close
23917 pending circuits that were waiting to connect to the same relay.
23918 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
23921 o Minor bugfixes (relays):
23922 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23923 exit node as a NOROUTE error, not an INTERNAL error, since they
23924 can apparently happen when trying to connect to the wrong sort
23925 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23927 o Minor bugfixes (bridges):
23928 - Fix a bug where the first connection works to a bridge that uses a
23929 pluggable transport with client-side parameters, but we don't send
23930 the client-side parameters on subsequent connections. (We don't
23931 use any pluggable transports with client-side parameters yet,
23932 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
23933 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
23935 o Minor bugfixes (node selection):
23936 - If ExcludeNodes is set, consider non-excluded hidden service
23937 directory servers before excluded ones. Do not consider excluded
23938 hidden service directory servers at all if StrictNodes is
23939 set. (Previously, we would sometimes decide to connect to those
23940 servers, and then realize before we initiated a connection that
23941 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
23942 Reported by "mr-4".
23943 - If we set the ExitNodes option but it doesn't include any nodes
23944 that have the Exit flag, we would choose not to bootstrap. Now we
23945 bootstrap so long as ExitNodes includes nodes which can exit to
23946 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
23948 o Minor bugfixes (controller and command-line):
23949 - If changing a config option via "setconf" fails in a recoverable
23950 way, we used to nonetheless write our new control ports to the
23951 file described by the "ControlPortWriteToFile" option. Now we only
23952 write out that file if we successfully switch to the new config
23953 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
23954 - When a command-line option such as --version or --help that
23955 ordinarily implies --hush appears on the command line along with
23956 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
23957 only if it appeared later on the command line. Fixes bug 9578;
23958 bugfix on 0.2.5.1-alpha.
23960 o Minor bugfixes (code correctness):
23961 - Previously we used two temporary files when writing descriptors to
23962 disk; now we only use one. Fixes bug 1376.
23963 - Remove an erroneous (but impossible and thus harmless) pointer
23964 comparison that would have allowed compilers to skip a bounds
23965 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
23966 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
23967 - Fix an always-true assertion in pluggable transports code so it
23968 actually checks what it was trying to check. Fixes bug 10046;
23969 bugfix on 0.2.3.9-alpha. Found by "dcb".
23971 o Minor bugfixes (protocol correctness):
23972 - When receiving a VERSIONS cell with an odd number of bytes, close
23973 the connection immediately since the cell is malformed. Fixes bug
23974 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
23977 o Minor bugfixes (build):
23978 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
23979 turned off (that is, without support for v2 link handshakes). Fixes
23980 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
23981 - Fix compilation warnings and startup issues when running with
23982 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
23984 - Fix compilation on Solaris 9, which didn't like us having an
23985 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
23987 o Minor bugfixes (testing):
23988 - Fix a segmentation fault in our benchmark code when running with
23989 Fedora's OpenSSL package, or any other OpenSSL that provides
23990 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23992 o Minor bugfixes (log messages):
23993 - Fix a bug where clients using bridges would report themselves
23994 as 50% bootstrapped even without a live consensus document.
23995 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
23996 - Suppress a warning where, if there's only one directory authority
23997 in the network, we would complain that votes and signatures cannot
23998 be uploaded to other directory authorities. Fixes bug 10842;
23999 bugfix on 0.2.2.26-beta.
24000 - Report bootstrapping progress correctly when we're downloading
24001 microdescriptors. We had updated our "do we have enough microdescs
24002 to begin building circuits?" logic most recently in 0.2.4.10-alpha
24003 (see bug 5956), but we left the bootstrap status event logic at
24004 "how far through getting 1/4 of them are we?" Fixes bug 9958;
24005 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
24007 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
24008 - Avoid a crash bug when starting with a corrupted microdescriptor
24009 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
24010 - If we fail to dump a previously cached microdescriptor to disk, avoid
24011 freeing duplicate data later on. Fixes bug 10423; bugfix on
24012 0.2.4.13-alpha. Spotted by "bobnomnom".
24014 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
24015 - Correctly log long IPv6 exit policies, instead of truncating them
24016 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
24017 - Our default TLS ecdhe groups were backwards: we meant to be using
24018 P224 for relays (for performance win) and P256 for bridges (since
24019 it is more common in the wild). Instead we had it backwards. After
24020 reconsideration, we decided that the default should be P256 on all
24021 hosts, since its security is probably better, and since P224 is
24022 reportedly used quite little in the wild. Found by "skruffy" on
24023 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
24024 - Free directory authority certificate download statuses on exit
24025 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
24027 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
24028 - If the guard we choose first doesn't answer, we would try the
24029 second guard, but once we connected to the second guard we would
24030 abandon it and retry the first one, slowing down bootstrapping.
24031 The fix is to treat all our initially chosen guards as acceptable
24032 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
24033 - Fix an assertion failure that would occur when disabling the
24034 ORPort setting on a running Tor process while accounting was
24035 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
24036 - When examining the list of network interfaces to find our address,
24037 do not consider non-running or disabled network interfaces. Fixes
24038 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
24039 - Avoid an off-by-one error when checking buffer boundaries when
24040 formatting the exit status of a pluggable transport helper.
24041 This is probably not an exploitable bug, but better safe than
24042 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
24045 o Removed code and features:
24046 - Clients now reject any directory authority certificates lacking
24047 a dir-key-crosscert element. These have been included since
24048 0.2.1.9-alpha, so there's no real reason for them to be optional
24049 any longer. Completes proposal 157. Resolves ticket 10162.
24050 - Remove all code that existed to support the v2 directory system,
24051 since there are no longer any v2 directory authorities. Resolves
24053 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
24054 options, which were used for designating authorities as "Hidden
24055 service authorities". There has been no use of hidden service
24056 authorities since 0.2.2.1-alpha, when we stopped uploading or
24057 downloading v0 hidden service descriptors. Fixes bug 10881; also
24058 part of a fix for bug 10841.
24060 o Code simplification and refactoring:
24061 - Remove some old fallback code designed to keep Tor clients working
24062 in a network with only two working relays. Elsewhere in the code we
24063 have long since stopped supporting such networks, so there wasn't
24064 much point in keeping it around. Addresses ticket 9926.
24065 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
24066 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
24067 - Remove data structures which were introduced to implement the
24068 CellStatistics option: they are now redundant with the addition
24069 of a timestamp to the regular packed_cell_t data structure, which
24070 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
24073 o Documentation (man page) fixes:
24074 - Update manpage to describe some of the files you can expect to
24075 find in Tor's DataDirectory. Addresses ticket 9839.
24076 - Document that all but one DirPort entry must have the NoAdvertise
24077 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
24079 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
24080 - Clarify the usage and risks of setting the ContactInfo torrc line
24081 for your relay or bridge. Resolves ticket 9854.
24082 - Add anchors to the manpage so we can link to the html version of
24083 the documentation for specific options. Resolves ticket 9866.
24084 - Replace remaining references to DirServer in man page and
24085 log entries. Resolves ticket 10124.
24088 - Make the "tor-gencert" tool used by directory authority operators
24089 create 2048-bit signing keys by default (rather than 1024-bit, since
24090 1024-bit is uncomfortably small these days). Addresses ticket 10324.
24093 Changes in version 0.2.4.20 - 2013-12-22
24094 Tor 0.2.4.20 fixes potentially poor random number generation for users
24095 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
24096 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
24097 and 4) have no state file in their DataDirectory (as would happen on
24098 first start). Users who generated relay or hidden service identity
24099 keys in such a situation should discard them and generate new ones.
24101 This release also fixes a logic error that caused Tor clients to build
24102 many more preemptive circuits than they actually need.
24105 - Do not allow OpenSSL engines to replace the PRNG, even when
24106 HardwareAccel is set. The only default builtin PRNG engine uses
24107 the Intel RDRAND instruction to replace the entire PRNG, and
24108 ignores all attempts to seed it with more entropy. That's
24109 cryptographically stupid: the right response to a new alleged
24110 entropy source is never to discard all previously used entropy
24111 sources. Fixes bug 10402; works around behavior introduced in
24112 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
24114 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
24115 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
24116 - Avoid launching spurious extra circuits when a stream is pending.
24117 This fixes a bug where any circuit that _wasn't_ unusable for new
24118 streams would be treated as if it were, causing extra circuits to
24119 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
24122 - Avoid a crash bug when starting with a corrupted microdescriptor
24123 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
24124 - If we fail to dump a previously cached microdescriptor to disk, avoid
24125 freeing duplicate data later on. Fixes bug 10423; bugfix on
24126 0.2.4.13-alpha. Spotted by "bobnomnom".
24129 Changes in version 0.2.4.19 - 2013-12-11
24130 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
24131 (1986-2013). Aaron worked on diverse projects including helping to guide
24132 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
24133 transparency to the U.S government's PACER documents, and contributing
24134 design and development for Tor and Tor2Web. Aaron was one of the latest
24135 martyrs in our collective fight for civil liberties and human rights,
24136 and his death is all the more painful because he was one of us.
24138 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
24139 a new circuit handshake and link encryption that use ECC to provide
24140 better security and efficiency; makes relays better manage circuit
24141 creation requests; uses "directory guards" to reduce client enumeration
24142 risks; makes bridges collect and report statistics about the pluggable
24143 transports they support; cleans up and improves our geoip database;
24144 gets much closer to IPv6 support for clients, bridges, and relays; makes
24145 directory authorities use measured bandwidths rather than advertised
24146 ones when computing flags and thresholds; disables client-side DNS
24147 caching to reduce tracking risks; and fixes a big bug in bridge
24148 reachability testing. This release introduces two new design
24149 abstractions in the code: a new "channel" abstraction between circuits
24150 and or_connections to allow for implementing alternate relay-to-relay
24151 transports, and a new "circuitmux" abstraction storing the queue of
24152 circuits for a channel. The release also includes many stability,
24153 security, and privacy fixes.
24156 Changes in version 0.2.4.18-rc - 2013-11-16
24157 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
24158 series. It takes a variety of fixes from the 0.2.5.x branch to improve
24159 stability, performance, and better handling of edge cases.
24162 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
24163 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
24164 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
24165 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
24166 them to solve bug 6033.)
24169 - No longer stop reading or writing on cpuworker connections when
24170 our rate limiting buckets go empty. Now we should handle circuit
24171 handshake requests more promptly. Resolves bug 9731.
24172 - If we are unable to save a microdescriptor to the journal, do not
24173 drop it from memory and then reattempt downloading it. Fixes bug
24174 9645; bugfix on 0.2.2.6-alpha.
24175 - Stop trying to bootstrap all our directory information from
24176 only our first guard. Discovered while fixing bug 9946; bugfix
24178 - The new channel code sometimes lost track of in-progress circuits,
24179 causing long-running clients to stop building new circuits. The
24180 fix is to always call circuit_n_chan_done(chan, 0) from
24181 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
24183 o Minor bugfixes (on 0.2.4.x):
24184 - Correctly log long IPv6 exit policies, instead of truncating them
24185 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
24186 - Our default TLS ecdhe groups were backwards: we meant to be using
24187 P224 for relays (for performance win) and P256 for bridges (since
24188 it is more common in the wild). Instead we had it backwards. After
24189 reconsideration, we decided that the default should be P256 on all
24190 hosts, since its security is probably better, and since P224 is
24191 reportedly used quite little in the wild. Found by "skruffy" on
24192 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
24193 - Free directory authority certificate download statuses on exit
24194 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
24196 o Minor bugfixes (on 0.2.3.x and earlier):
24197 - If the guard we choose first doesn't answer, we would try the
24198 second guard, but once we connected to the second guard we would
24199 abandon it and retry the first one, slowing down bootstrapping.
24200 The fix is to treat all our initially chosen guards as acceptable
24201 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
24202 - Fix an assertion failure that would occur when disabling the
24203 ORPort setting on a running Tor process while accounting was
24204 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
24205 - When examining the list of network interfaces to find our address,
24206 do not consider non-running or disabled network interfaces. Fixes
24207 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
24208 - Avoid an off-by-one error when checking buffer boundaries when
24209 formatting the exit status of a pluggable transport helper.
24210 This is probably not an exploitable bug, but better safe than
24211 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
24214 o Minor features (protecting client timestamps):
24215 - Clients no longer send timestamps in their NETINFO cells. These were
24216 not used for anything, and they provided one small way for clients
24217 to be distinguished from each other as they moved from network to
24218 network or behind NAT. Implements part of proposal 222.
24219 - Clients now round timestamps in INTRODUCE cells down to the nearest
24220 10 minutes. If a new Support022HiddenServices option is set to 0, or
24221 if it's set to "auto" and the feature is disabled in the consensus,
24222 the timestamp is sent as 0 instead. Implements part of proposal 222.
24223 - Stop sending timestamps in AUTHENTICATE cells. This is not such
24224 a big deal from a security point of view, but it achieves no actual
24225 good purpose, and isn't needed. Implements part of proposal 222.
24226 - Reduce down accuracy of timestamps in hidden service descriptors.
24227 Implements part of proposal 222.
24229 o Minor features (other):
24230 - Improve the circuit queue out-of-memory handler. Previously, when
24231 we ran low on memory, we'd close whichever circuits had the most
24232 queued cells. Now, we close those that have the *oldest* queued
24233 cells, on the theory that those are most responsible for us
24234 running low on memory. Based on analysis from a forthcoming paper
24235 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
24236 - Generate bootstrapping status update events correctly when fetching
24237 microdescriptors. Fixes bug 9927.
24238 - Update to the October 2 2013 Maxmind GeoLite Country database.
24240 o Documentation fixes:
24241 - Clarify the usage and risks of setting the ContactInfo torrc line
24242 for your relay or bridge. Resolves ticket 9854.
24243 - Add anchors to the manpage so we can link to the html version of
24244 the documentation for specific options. Resolves ticket 9866.
24245 - Replace remaining references to DirServer in man page and
24246 log entries. Resolves ticket 10124.
24249 Changes in version 0.2.5.1-alpha - 2013-10-02
24250 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
24251 on Linux, allows bridges that offer pluggable transports to report usage
24252 statistics, fixes many issues to make testing easier, and provides
24253 a pile of minor features and bugfixes that have been waiting for a
24254 release of the new branch.
24256 This is the first alpha release in a new series, so expect there to
24257 be bugs. Users who would rather test out a more stable branch should
24258 stay with 0.2.4.x for now.
24260 o Major features (security):
24261 - Use the seccomp2 syscall filtering facility on Linux to limit
24262 which system calls Tor can invoke. This is an experimental,
24263 Linux-only feature to provide defense-in-depth against unknown
24264 attacks. To try turning it on, set "Sandbox 1" in your torrc
24265 file. Please be ready to report bugs. We hope to add support
24266 for better sandboxing in the future, including more fine-grained
24267 filters, better division of responsibility, and support for more
24268 platforms. This work has been done by Cristian-Matei Toader for
24269 Google Summer of Code.
24270 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
24271 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
24272 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
24273 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
24274 them to solve bug 6033.)
24276 o Major features (other):
24277 - Add support for passing arguments to managed pluggable transport
24278 proxies. Implements ticket 3594.
24279 - Bridges now track GeoIP information and the number of their users
24280 even when pluggable transports are in use, and report usage
24281 statistics in their extra-info descriptors. Resolves tickets 4773
24283 - Make testing Tor networks bootstrap better: lower directory fetch
24284 retry schedules and maximum interval without directory requests,
24285 and raise maximum download tries. Implements ticket 6752.
24286 - Add make target 'test-network' to run tests on a Chutney network.
24287 Implements ticket 8530.
24288 - The ntor handshake is now on-by-default, no matter what the
24289 directory authorities recommend. Implements ticket 8561.
24292 - Instead of writing destroy cells directly to outgoing connection
24293 buffers, queue them and intersperse them with other outgoing cells.
24294 This can prevent a set of resource starvation conditions where too
24295 many pending destroy cells prevent data cells from actually getting
24296 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
24297 bugfix on 0.2.0.1-alpha.
24298 - If we are unable to save a microdescriptor to the journal, do not
24299 drop it from memory and then reattempt downloading it. Fixes bug
24300 9645; bugfix on 0.2.2.6-alpha.
24301 - The new channel code sometimes lost track of in-progress circuits,
24302 causing long-running clients to stop building new circuits. The
24303 fix is to always call circuit_n_chan_done(chan, 0) from
24304 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
24307 - Tor now builds each source file in two modes: a mode that avoids
24308 exposing identifiers needlessly, and another mode that exposes
24309 more identifiers for testing. This lets the compiler do better at
24310 optimizing the production code, while enabling us to take more
24311 radical measures to let the unit tests test things.
24312 - The production builds no longer include functions used only in
24313 the unit tests; all functions exposed from a module only for
24314 unit-testing are now static in production builds.
24315 - Add an --enable-coverage configuration option to make the unit
24316 tests (and a new src/or/tor-cov target) to build with gcov test
24320 - We now have rudimentary function mocking support that our unit
24321 tests can use to test functions in isolation. Function mocking
24322 lets the tests temporarily replace a function's dependencies with
24323 stub functions, so that the tests can check the function without
24324 invoking the other functions it calls.
24325 - Add more unit tests for the <circid,channel>->circuit map, and
24326 the destroy-cell-tracking code to fix bug 7912.
24327 - Unit tests for failing cases of the TAP onion handshake.
24328 - More unit tests for address-manipulation functions.
24330 o Minor features (protecting client timestamps):
24331 - Clients no longer send timestamps in their NETINFO cells. These were
24332 not used for anything, and they provided one small way for clients
24333 to be distinguished from each other as they moved from network to
24334 network or behind NAT. Implements part of proposal 222.
24335 - Clients now round timestamps in INTRODUCE cells down to the nearest
24336 10 minutes. If a new Support022HiddenServices option is set to 0, or
24337 if it's set to "auto" and the feature is disabled in the consensus,
24338 the timestamp is sent as 0 instead. Implements part of proposal 222.
24339 - Stop sending timestamps in AUTHENTICATE cells. This is not such
24340 a big deal from a security point of view, but it achieves no actual
24341 good purpose, and isn't needed. Implements part of proposal 222.
24342 - Reduce down accuracy of timestamps in hidden service descriptors.
24343 Implements part of proposal 222.
24345 o Minor features (config options):
24346 - Config (torrc) lines now handle fingerprints which are missing
24347 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
24348 - Support a --dump-config option to print some or all of the
24349 configured options. Mainly useful for debugging the command-line
24350 option parsing code. Helps resolve ticket 4647.
24351 - Raise awareness of safer logging: notify user of potentially
24352 unsafe config options, like logging more verbosely than severity
24353 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
24354 - Add a new configuration option TestingV3AuthVotingStartOffset
24355 that bootstraps a network faster by changing the timing for
24356 consensus votes. Addresses ticket 8532.
24357 - Add a new torrc option "ServerTransportOptions" that allows
24358 bridge operators to pass configuration parameters to their
24359 pluggable transports. Resolves ticket 8929.
24360 - The config (torrc) file now accepts bandwidth and space limits in
24361 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
24362 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
24365 o Minor features (build):
24366 - Add support for `--library-versions` flag. Implements ticket 6384.
24367 - Return the "unexpected sendme" warnings to a warn severity, but make
24368 them rate limited, to help diagnose ticket 8093.
24369 - Detect a missing asciidoc, and warn the user about it, during
24370 configure rather than at build time. Fixes issue 6506. Patch from
24373 o Minor features (other):
24374 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
24375 sockets in a single system call. Implements ticket 5129.
24376 - Log current accounting state (bytes sent and received + remaining
24377 time for the current accounting period) in the relay's heartbeat
24378 message. Implements ticket 5526; patch from Peter Retzlaff.
24379 - Implement the TRANSPORT_LAUNCHED control port event that
24380 notifies controllers about new launched pluggable
24381 transports. Resolves ticket 5609.
24382 - If we're using the pure-C 32-bit curve25519_donna implementation
24383 of curve25519, build it with the -fomit-frame-pointer option to
24384 make it go faster on register-starved hosts. This improves our
24385 handshake performance by about 6% on i386 hosts without nacl.
24386 Closes ticket 8109.
24387 - Update to the September 4 2013 Maxmind GeoLite Country database.
24390 - Set the listen() backlog limit to the largest actually supported
24391 on the system, not to the value in a header file. Fixes bug 9716;
24392 bugfix on every released Tor.
24393 - No longer accept malformed http headers when parsing urls from
24394 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
24395 bugfix on 0.0.6pre1.
24396 - In munge_extrainfo_into_routerinfo(), check the return value of
24397 memchr(). This would have been a serious issue if we ever passed
24398 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
24400 - On the chance that somebody manages to build Tor on a
24401 platform where time_t is unsigned, correct the way that
24402 microdesc_add_to_cache() handles negative time arguments.
24403 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
24404 - Reject relative control socket paths and emit a warning. Previously,
24405 single-component control socket paths would be rejected, but Tor
24406 would not log why it could not validate the config. Fixes bug 9258;
24407 bugfix on 0.2.3.16-alpha.
24409 o Minor bugfixes (command line):
24410 - Use a single command-line parser for parsing torrc options on the
24411 command line and for finding special command-line options to avoid
24412 inconsistent behavior for torrc option arguments that have the same
24413 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
24415 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
24416 9573; bugfix on 0.0.9pre5.
24418 o Minor fixes (build, auxiliary programs):
24419 - Stop preprocessing the "torify" script with autoconf, since
24420 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
24422 - The tor-fw-helper program now follows the standard convention and
24423 exits with status code "0" on success. Fixes bug 9030; bugfix on
24424 0.2.3.1-alpha. Patch by Arlo Breault.
24425 - Corrected ./configure advice for what openssl dev package you should
24426 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
24428 o Minor code improvements:
24429 - Remove constants and tests for PKCS1 padding; it's insecure and
24430 shouldn't be used for anything new. Fixes bug 8792; patch
24432 - Remove instances of strcpy() from the unit tests. They weren't
24433 hurting anything, since they were only in the unit tests, but it's
24434 embarrassing to have strcpy() in the code at all, and some analysis
24435 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
24436 0.2.3.8-alpha. Patch from Arlo Breault.
24438 o Removed features:
24439 - Remove migration code from when we renamed the "cached-routers"
24440 file to "cached-descriptors" back in 0.2.0.8-alpha. This
24441 incidentally resolves ticket 6502 by cleaning up the related code
24442 a bit. Patch from Akshay Hebbar.
24444 o Code simplification and refactoring:
24445 - Extract the common duplicated code for creating a subdirectory
24446 of the data directory and writing to a file in it. Fixes ticket
24447 4282; patch from Peter Retzlaff.
24448 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
24449 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
24450 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
24451 - Add a set of accessor functions for the circuit timeout data
24452 structure. Fixes ticket 6153; patch from "piet".
24453 - Clean up exit paths from connection_listener_new(). Closes ticket
24454 8789. Patch from Arlo Breault.
24455 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
24456 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
24457 - Use a doubly-linked list to implement the global circuit list.
24458 Resolves ticket 9108. Patch from Marek Majkowski.
24459 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
24462 Changes in version 0.2.4.17-rc - 2013-09-05
24463 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
24464 series. It adds an emergency step to help us tolerate the massive
24465 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
24466 circuit-level handshakes now effectively jump the queue compared to
24467 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
24468 big bug hindering bridge reachability tests.
24471 - Relays now process the new "NTor" circuit-level handshake requests
24472 with higher priority than the old "TAP" circuit-level handshake
24473 requests. We still process some TAP requests to not totally starve
24474 0.2.3 clients when NTor becomes popular. A new consensus parameter
24475 "NumNTorsPerTAP" lets us tune the balance later if we need to.
24476 Implements ticket 9574.
24479 - If the circuit build timeout logic is disabled (via the consensus,
24480 or because we are an authority), then don't build testing circuits.
24481 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
24482 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
24483 previously they did not, which prevented them from receiving
24484 successful connections from relays for self-test or bandwidth
24485 testing. Also, when a relay is extending a circuit to a bridge,
24486 it needs to send a NETINFO cell, even when the bridge hasn't sent
24487 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
24488 - If the time to download the next old-style networkstatus is in
24489 the future, do not decline to consider whether to download the
24490 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
24494 - Avoid double-closing the listener socket in our socketpair()
24495 replacement (used on Windows) in the case where the addresses on
24496 our opened sockets don't match what we expected. Fixes bug 9400;
24497 bugfix on 0.0.2pre7. Found by Coverity.
24499 o Minor fixes (config options):
24500 - Avoid overflows when the user sets MaxCircuitDirtiness to a
24501 ridiculously high value, by imposing a (ridiculously high) 30-day
24502 maximum on MaxCircuitDirtiness.
24503 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
24504 message is logged at notice, not at info.
24505 - Warn and fail if a server is configured not to advertise any
24506 ORPorts at all. (We need *something* to put in our descriptor,
24507 or we just won't work.)
24510 - Track how many "TAP" and "NTor" circuit handshake requests we get,
24511 and how many we complete, and log it every hour to help relay
24512 operators follow trends in network load. Addresses ticket 9658.
24513 - Update to the August 7 2013 Maxmind GeoLite Country database.
24516 Changes in version 0.2.4.16-rc - 2013-08-10
24517 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
24518 series. It fixes several crash bugs in the 0.2.4 branch.
24521 - Fix a bug in the voting algorithm that could yield incorrect results
24522 when a non-naming authority declared too many flags. Fixes bug 9200;
24523 bugfix on 0.2.0.3-alpha.
24524 - Fix an uninitialized read that could in some cases lead to a remote
24525 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
24526 Anybody running a hidden service on the experimental 0.2.4.x
24527 branch should upgrade. (This is, so far as we know, unrelated to
24529 - Avoid an assertion failure when processing DNS replies without the
24530 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
24531 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
24532 0.2.4.15-rc. Found by stem integration tests.
24535 - Fix an invalid memory read that occurred when a pluggable
24536 transport proxy failed its configuration protocol.
24537 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
24538 - When evaluating whether to use a connection that we haven't
24539 decided is canonical using a recent link protocol version,
24540 decide that it's canonical only if it used address _does_
24541 match the desired address. Fixes bug 9309; bugfix on
24542 0.2.4.4-alpha. Reported by skruffy.
24543 - Make the default behavior of NumDirectoryGuards be to track
24544 NumEntryGuards. Now a user who changes only NumEntryGuards will get
24545 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
24546 - Fix a spurious compilation warning with some older versions of
24547 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
24550 - Update to the July 3 2013 Maxmind GeoLite Country database.
24553 Changes in version 0.2.4.15-rc - 2013-07-01
24554 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
24555 series. It fixes a few smaller bugs, but generally appears stable.
24556 Please test it and let us know whether it is!
24559 - When receiving a new configuration file via the control port's
24560 LOADCONF command, do not treat the defaults file as absent.
24561 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
24564 - Issue a warning when running with the bufferevents backend enabled.
24565 It's still not stable, and people should know that they're likely
24566 to hit unexpected problems. Closes ticket 9147.
24569 Changes in version 0.2.4.14-alpha - 2013-06-18
24570 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
24571 present in 0.2.4.13-alpha.
24574 - When we have too much memory queued in circuits (according to a new
24575 MaxMemInCellQueues option), close the circuits consuming the most
24576 memory. This prevents us from running out of memory as a relay if
24577 circuits fill up faster than they can be drained. Fixes bug 9063;
24578 bugfix on the 54th commit of Tor. This bug is a further fix beyond
24579 bug 6252, whose fix was merged into 0.2.3.21-rc.
24581 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
24582 where we tried to solve this issue simply by imposing an upper limit
24583 on the number of queued cells for a single circuit. That approach
24584 proved to be problematic, since there are ways to provoke clients to
24585 send a number of cells in excess of any such reasonable limit. Fixes
24586 bug 9072; bugfix on 0.2.4.13-alpha.
24588 - Limit hidden service descriptors to at most ten introduction
24589 points, to slow one kind of guard enumeration. Fixes bug 9002;
24590 bugfix on 0.1.1.11-alpha.
24593 Changes in version 0.2.4.13-alpha - 2013-06-14
24594 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
24595 vulnerabilities, makes socks5 username/password circuit isolation
24596 actually actually work (this time for sure!), and cleans up a bunch
24597 of other issues in preparation for a release candidate.
24599 o Major bugfixes (robustness):
24600 - Close any circuit that has too many cells queued on it. Fixes
24601 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
24602 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
24603 - Prevent the get_freelists() function from running off the end of
24604 the list of freelists if it somehow gets an unrecognized
24605 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
24607 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
24608 when an exit connection with optimistic data succeeds immediately
24609 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
24611 - Fix a directory authority crash bug when building a consensus
24612 using an older consensus as its basis. Fixes bug 8833. Bugfix
24616 - Avoid a memory leak where we would leak a consensus body when we
24617 find that a consensus which we couldn't previously verify due to
24618 missing certificates is now verifiable. Fixes bug 8719; bugfix
24620 - We used to always request authority certificates by identity digest,
24621 meaning we'd get the newest one even when we wanted one with a
24622 different signing key. Then we would complain about being given
24623 a certificate we already had, and never get the one we really
24624 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
24625 resource to request the one we want. Fixes bug 5595; bugfix on
24627 - Follow the socks5 protocol when offering username/password
24628 authentication. The fix for bug 8117 exposed this bug, and it
24629 turns out real-world applications like Pidgin do care. Bugfix on
24630 0.2.3.2-alpha; fixes bug 8879.
24631 - Prevent failures on Windows Vista and later when rebuilding the
24632 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
24633 bugfix on 0.2.4.12-alpha.
24636 - Fix an impossible buffer overrun in the AES unit tests. Fixes
24637 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
24638 - If for some reason we fail to write a microdescriptor while
24639 rebuilding the cache, do not let the annotations from that
24640 microdescriptor linger in the cache file, and do not let the
24641 microdescriptor stay recorded as present in its old location.
24642 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
24643 - Fix a memory leak that would occur whenever a configuration
24644 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
24645 - Paste the description for PathBias parameters from the man
24646 page into or.h, so the code documents them too. Fixes bug 7982;
24647 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
24648 - Relays now treat a changed IPv6 ORPort as sufficient reason to
24649 publish an updated descriptor. Fixes bug 6026; bugfix on
24651 - When launching a resolve request on behalf of an AF_UNIX control
24652 socket, omit the address field of the new entry connection, used in
24653 subsequent controller events, rather than letting tor_dup_addr()
24654 set it to "<unknown address type>". Fixes bug 8639; bugfix on
24657 o Minor bugfixes (log messages):
24658 - Fix a scaling issue in the path bias accounting code that
24659 resulted in "Bug:" log messages from either
24660 pathbias_scale_close_rates() or pathbias_count_build_success().
24661 This represents a bugfix on a previous bugfix: the original fix
24662 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
24664 - Give a less useless error message when the user asks for an IPv4
24665 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
24669 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
24670 to tolerate bug 8093 for now.
24671 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
24672 in directory authority votes to describe whether they have enough
24673 measured bandwidths to ignore advertised (relay descriptor)
24674 bandwidth claims. Resolves ticket 8711.
24675 - Update to the June 5 2013 Maxmind GeoLite Country database.
24677 o Removed documentation:
24678 - Remove some of the older contents of doc/ as obsolete; move others
24679 to torspec.git. Fixes bug 8965.
24681 o Code simplification and refactoring:
24682 - Avoid using character buffers when constructing most directory
24683 objects: this approach was unwieldy and error-prone. Instead,
24684 build smartlists of strings, and concatenate them when done.
24687 Changes in version 0.2.4.12-alpha - 2013-04-18
24688 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
24689 process for lengthening the guard rotation period, makes directory
24690 authority opinions in the consensus a bit less gameable, makes socks5
24691 username/password circuit isolation actually work, and fixes a wide
24692 variety of other issues.
24695 - Raise the default time that a client keeps an entry guard from
24696 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
24697 2012 paper. (We would make it even longer, but we need better client
24698 load balancing first.) Also, make the guard lifetime controllable
24699 via a new GuardLifetime torrc option and a GuardLifetime consensus
24700 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
24701 - Directory authorities now prefer using measured bandwidths to
24702 advertised ones when computing flags and thresholds. Resolves
24704 - Directory authorities that have more than a threshold number
24705 of relays with measured bandwidths now treat relays with unmeasured
24706 bandwidths as having bandwidth 0. Resolves ticket 8435.
24708 o Major bugfixes (assert / resource use):
24709 - Avoid a bug where our response to TLS renegotiation under certain
24710 network conditions could lead to a busy-loop, with 100% CPU
24711 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
24712 - Avoid an assertion when we discover that we'd like to write a cell
24713 onto a closing connection: just discard the cell. Fixes another
24714 case of bug 7350; bugfix on 0.2.4.4-alpha.
24716 o Major bugfixes (client-side privacy):
24717 - When we mark a circuit as unusable for new circuits, have it
24718 continue to be unusable for new circuits even if MaxCircuitDirtiness
24719 is increased too much at the wrong time, or the system clock jumps
24720 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
24721 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
24722 which have resolved to internal addresses") is set, apply that
24723 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
24724 - When an exit relay rejects a stream with reason "exit policy", but
24725 we only know an exit policy summary (e.g. from the microdesc
24726 consensus) for it, do not mark the relay as useless for all exiting.
24727 Instead, mark just the circuit as unsuitable for that particular
24728 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
24729 - Allow applications to get proper stream isolation with
24730 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
24731 username/password authentication also offer "no authentication". Tor
24732 had previously preferred "no authentication", so the applications
24733 never actually sent Tor their auth details. Now Tor selects
24734 username/password authentication if it's offered. You can disable
24735 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
24736 bug 8117; bugfix on 0.2.3.3-alpha.
24738 o Major bugfixes (other):
24739 - When unable to find any working directory nodes to use as a
24740 directory guard, give up rather than adding the same non-working
24741 nodes to the directory guard list over and over. Fixes bug 8231;
24742 bugfix on 0.2.4.8-alpha.
24745 - Reject as invalid most directory objects containing a NUL.
24746 Belt-and-suspender fix for bug 8037.
24747 - In our testsuite, create temporary directories with a bit more
24748 entropy in their name to make name collisions less likely. Fixes
24750 - Add CACHED keyword to ADDRMAP events in the control protocol
24751 to indicate whether a DNS result will be cached or not. Resolves
24753 - Update to the April 3 2013 Maxmind GeoLite Country database.
24755 o Minor features (build):
24756 - Detect and reject attempts to build Tor with threading support
24757 when OpenSSL has been compiled without threading support.
24759 - Clarify that when autoconf is checking for nacl, it is checking
24760 specifically for nacl with a fast curve25519 implementation.
24762 - Warn if building on a platform with an unsigned time_t: there
24763 are too many places where Tor currently assumes that time_t can
24764 hold negative values. We'd like to fix them all, but probably
24767 o Minor bugfixes (build):
24768 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
24769 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
24770 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
24771 - Add the old src/or/micro-revision.i filename to CLEANFILES.
24772 On the off chance that somebody has one, it will go away as soon
24773 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
24774 - Build Tor correctly on 32-bit platforms where the compiler can build
24775 but not run code using the "uint128_t" construction. Fixes bug 8587;
24776 bugfix on 0.2.4.8-alpha.
24777 - Fix compilation warning with some versions of clang that would
24778 prefer the -Wswitch-enum compiler flag to warn about switch
24779 statements with missing enum values, even if those switch
24780 statements have a "default:" statement. Fixes bug 8598; bugfix
24783 o Minor bugfixes (protocol):
24784 - Fix the handling of a TRUNCATE cell when it arrives while the
24785 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
24786 - Fix a misframing issue when reading the version numbers in a
24787 VERSIONS cell. Previously we would recognize [00 01 00 02] as
24788 'version 1, version 2, and version 0x100', when it should have
24789 only included versions 1 and 2. Fixes bug 8059; bugfix on
24790 0.2.0.10-alpha. Reported pseudonymously.
24791 - Make the format and order of STREAM events for DNS lookups
24792 consistent among the various ways to launch DNS lookups. Fixes
24793 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
24794 - Correct our check for which versions of Tor support the EXTEND2
24795 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
24796 later, when support was really added in version 0.2.4.8-alpha.
24797 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
24799 o Minor bugfixes (other):
24800 - Correctly store microdescriptors and extrainfo descriptors with
24801 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
24802 Bug reported by "cypherpunks".
24803 - Increase the width of the field used to remember a connection's
24804 link protocol version to two bytes. Harmless for now, since the
24805 only currently recognized versions are one byte long. Reported
24806 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
24807 - If the state file's path bias counts are invalid (presumably from a
24808 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
24809 additional checks and log messages to the scaling of Path Bias
24810 counts, in case there still are remaining issues with scaling.
24811 Should help resolve bug 8235.
24812 - Eliminate several instances where we use "Nickname=ID" to refer to
24813 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
24814 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
24815 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
24817 o Minor bugfixes (syscalls):
24818 - Always check the return values of functions fcntl() and
24819 setsockopt(). We don't believe these are ever actually failing in
24820 practice, but better safe than sorry. Also, checking these return
24821 values should please analysis tools like Coverity. Patch from
24822 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
24823 - Use direct writes rather than stdio when building microdescriptor
24824 caches, in an attempt to mitigate bug 8031, or at least make it
24827 o Minor bugfixes (config):
24828 - When rejecting a configuration because we were unable to parse a
24829 quoted string, log an actual error message. Fixes bug 7950; bugfix
24831 - Behave correctly when the user disables LearnCircuitBuildTimeout
24832 but doesn't tell us what they would like the timeout to be. Fixes
24833 bug 6304; bugfix on 0.2.2.14-alpha.
24834 - When autodetecting the number of CPUs, use the number of available
24835 CPUs in preference to the number of configured CPUs. Inform the
24836 user if this reduces the number of available CPUs. Fixes bug 8002;
24837 bugfix on 0.2.3.1-alpha.
24838 - Make it an error when you set EntryNodes but disable UseGuardNodes,
24839 since it will (surprisingly to some users) ignore EntryNodes. Fixes
24840 bug 8180; bugfix on 0.2.3.11-alpha.
24841 - Allow TestingTorNetworks to override the 4096-byte minimum for
24842 the Fast threshold. Otherwise they can't bootstrap until they've
24843 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
24844 - Fix some logic errors when the user manually overrides the
24845 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
24848 o Minor bugfixes (log messages to help diagnose bugs):
24849 - If we fail to free a microdescriptor because of bug 7164, log
24850 the filename and line number from which we tried to free it.
24851 - Add another diagnostic to the heartbeat message: track and log
24852 overhead that TLS is adding to the data we write. If this is
24853 high, we are sending too little data to SSL_write at a time.
24854 Diagnostic for bug 7707.
24855 - Add more detail to a log message about relaxed timeouts, to help
24857 - Warn more aggressively when flushing microdescriptors to a
24858 microdescriptor cache fails, in an attempt to mitigate bug 8031,
24859 or at least make it more diagnosable.
24860 - Improve debugging output to help track down bug 8185 ("Bug:
24861 outgoing relay cell has n_chan==NULL. Dropping.")
24862 - Log the purpose of a path-bias testing circuit correctly.
24863 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
24865 o Minor bugfixes (0.2.4.x log messages that were too noisy):
24866 - Don't attempt to relax the timeout of already opened 1-hop circuits.
24867 They might never timeout. This should eliminate some/all cases of
24868 the relaxed timeout log message.
24869 - Use circuit creation time for network liveness evaluation. This
24870 should eliminate warning log messages about liveness caused
24871 by changes in timeout evaluation. Fixes bug 6572; bugfix on
24873 - Reduce a path bias length check from notice to info. The message
24874 is triggered when creating controller circuits. Fixes bug 8196;
24875 bugfix on 0.2.4.8-alpha.
24876 - Fix a path state issue that triggered a notice during relay startup.
24877 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
24878 - Reduce occurrences of warns about circuit purpose in
24879 connection_ap_expire_building(). Fixes bug 8477; bugfix on
24882 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
24883 - If we encounter a write failure on a SOCKS connection before we
24884 finish our SOCKS handshake, don't warn that we closed the
24885 connection before we could send a SOCKS reply. Fixes bug 8427;
24886 bugfix on 0.1.0.1-rc.
24887 - Correctly recognize that [::1] is a loopback address. Fixes
24888 bug 8377; bugfix on 0.2.1.3-alpha.
24889 - Fix a directory authority warn caused when we have a large amount
24890 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
24891 - Don't log inappropriate heartbeat messages when hibernating: a
24892 hibernating node is _expected_ to drop out of the consensus,
24893 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
24894 bugfix on 0.2.3.1-alpha.
24895 - Don't complain about bootstrapping problems while hibernating.
24896 These complaints reflect a general code problem, but not one
24897 with any problematic effects (no connections are actually
24898 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
24900 o Documentation fixes:
24901 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
24902 names match. Fixes bug 7768.
24903 - Make the torify manpage no longer refer to tsocks; torify hasn't
24904 supported tsocks since 0.2.3.14-alpha.
24905 - Make the tor manpage no longer reference tsocks.
24906 - Fix the GeoIPExcludeUnknown documentation to refer to
24907 ExcludeExitNodes rather than the currently nonexistent
24908 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
24911 - The tor-tsocks.conf is no longer distributed or installed. We
24912 recommend that tsocks users use torsocks instead. Resolves
24916 Changes in version 0.2.4.11-alpha - 2013-03-11
24917 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
24918 more robust, makes hidden service authentication work again, and
24919 resolves a DPI fingerprint for Tor's SSL transport.
24921 o Major features (directory authorities):
24922 - Directory authorities now support a new consensus method (17)
24923 where they cap the published bandwidth of servers for which
24924 insufficient bandwidth measurements exist. Fixes part of bug 2286.
24925 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
24926 serve any v2 directory information. Now we can test disabling the
24927 old deprecated v2 directory format, and see whether doing so has
24928 any effect on network load. Begins to fix bug 6783.
24929 - Directory authorities now include inside each vote a statement of
24930 the performance thresholds they used when assigning flags.
24931 Implements ticket 8151.
24933 o Major bugfixes (directory authorities):
24934 - Stop marking every relay as having been down for one hour every
24935 time we restart a directory authority. These artificial downtimes
24936 were messing with our Stable and Guard flag calculations. Fixes
24937 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
24939 o Major bugfixes (hidden services):
24940 - Allow hidden service authentication to succeed again. When we
24941 refactored the hidden service introduction code back
24942 in 0.2.4.1-alpha, we didn't update the code that checks
24943 whether authentication information is present, causing all
24944 authentication checks to return "false". Fix for bug 8207; bugfix
24945 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
24947 o Minor features (relays, bridges):
24948 - Make bridge relays check once a minute for whether their IP
24949 address has changed, rather than only every 15 minutes. Resolves
24950 bugs 1913 and 1992.
24951 - Refactor resolve_my_address() so it returns the method by which we
24952 decided our public IP address (explicitly configured, resolved from
24953 explicit hostname, guessed from interfaces, learned by gethostname).
24954 Now we can provide more helpful log messages when a relay guesses
24955 its IP address incorrectly (e.g. due to unexpected lines in
24956 /etc/hosts). Resolves ticket 2267.
24957 - Teach bridge-using clients to avoid 0.2.2 bridges when making
24958 microdescriptor-related dir requests, and only fall back to normal
24959 descriptors if none of their bridges can handle microdescriptors
24960 (as opposed to the fix in ticket 4013, which caused them to fall
24961 back to normal descriptors if *any* of their bridges preferred
24962 them). Resolves ticket 4994.
24963 - Randomize the lifetime of our SSL link certificate, so censors can't
24964 use the static value for filtering Tor flows. Resolves ticket 8443;
24965 related to ticket 4014 which was included in 0.2.2.33.
24966 - Support a new version of the link protocol that allows 4-byte circuit
24967 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
24968 a possible resource exhaustion issue. Closes ticket 7351; implements
24971 o Minor features (portability):
24972 - Tweak the curve25519-donna*.c implementations to tolerate systems
24973 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
24974 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
24975 the signs of types during autoconf. This is better than our old
24976 approach, which didn't work when cross-compiling.
24977 - Detect the sign of enum values, rather than assuming that MSC is the
24978 only compiler where enum types are all signed. Fixes bug 7727;
24979 bugfix on 0.2.4.10-alpha.
24981 o Minor features (other):
24982 - Say "KBytes" rather than "KB" in the man page (for various values
24983 of K), to further reduce confusion about whether Tor counts in
24984 units of memory or fractions of units of memory. Resolves ticket 7054.
24985 - Clear the high bit on curve25519 public keys before passing them to
24986 our backend, in case we ever wind up using a backend that doesn't do
24987 so itself. If we used such a backend, and *didn't* clear the high bit,
24988 we could wind up in a situation where users with such backends would
24989 be distinguishable from users without. Fixes bug 8121; bugfix on
24991 - Update to the March 6 2013 Maxmind GeoLite Country database.
24993 o Minor bugfixes (clients):
24994 - When we receive a RELAY_END cell with the reason DONE, or with no
24995 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
24996 status as "connection refused". Previously we reported these cases
24997 as success but then immediately closed the connection. Fixes bug
24998 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
24999 - Downgrade an assertion in connection_ap_expire_beginning to an
25000 LD_BUG message. The fix for bug 8024 should prevent this message
25001 from displaying, but just in case, a warn that we can diagnose
25002 is better than more assert crashes. Fixes bug 8065; bugfix on
25004 - Lower path use bias thresholds to .80 for notice and .60 for warn.
25005 Also make the rate limiting flags for the path use bias log messages
25006 independent from the original path bias flags. Fixes bug 8161;
25007 bugfix on 0.2.4.10-alpha.
25009 o Minor bugfixes (relays):
25010 - Stop trying to resolve our hostname so often (e.g. every time we
25011 think about doing a directory fetch). Now we reuse the cached
25012 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
25013 and 2410 (bugfix on 0.1.2.2-alpha).
25014 - Stop sending a stray "(null)" in some cases for the server status
25015 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
25017 - When choosing which stream on a formerly stalled circuit to wake
25018 first, make better use of the platform's weak RNG. Previously,
25019 we had been using the % ("modulo") operator to try to generate a
25020 1/N chance of picking each stream, but this behaves badly with
25021 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
25023 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
25024 Irix's random() only return 15 bits; Solaris's random() returns more
25025 bits but its RAND_MAX says it only returns 15, and so on. Motivated
25026 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
25028 o Minor bugfixes (directory authorities):
25029 - Directory authorities now use less space when formatting identical
25030 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
25033 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
25034 - Avoid leaking memory if we fail to compute a consensus signature
25035 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
25036 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
25038 - Fix a memory leak during safe-cookie controller authentication.
25039 Bugfix on 0.2.3.13-alpha.
25040 - Avoid memory leak of IPv6 policy content if we fail to format it into
25041 a router descriptor. Bugfix on 0.2.4.7-alpha.
25043 o Minor bugfixes (other code correctness issues):
25044 - Avoid a crash if we fail to generate an extrainfo descriptor.
25045 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
25046 this is CID 718634.
25047 - When detecting the largest possible file descriptor (in order to
25048 close all file descriptors when launching a new program), actually
25049 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
25050 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
25052 - Fix a copy-and-paste error when adding a missing A1 to a routerset
25053 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
25054 Bugfix on 0.2.4.10-alpha.
25055 - Fix an impossible-to-trigger integer overflow when estimating how
25056 long our onionskin queue would take. (This overflow would require us
25057 to accept 4 million onionskins before processing 100 of them.) Fixes
25058 bug 8210; bugfix on 0.2.4.10-alpha.
25060 o Code simplification and refactoring:
25061 - Add a wrapper function for the common "log a message with a
25065 Changes in version 0.2.4.10-alpha - 2013-02-04
25066 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
25067 certain attacks that flood the network with relays; changes the queue
25068 for circuit create requests from a sized-based limit to a time-based
25069 limit; resumes building with MSVC on Windows; and fixes a wide variety
25072 o Major bugfixes (directory authority):
25073 - When computing directory thresholds, ignore any rejected-as-sybil
25074 nodes during the computation so that they can't influence Fast,
25075 Guard, etc. (We should have done this for proposal 109.) Fixes
25077 - When marking a node as a likely sybil, reset its uptime metrics
25078 to zero, so that it cannot time towards getting marked as Guard,
25079 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
25083 - When a TLS write is partially successful but incomplete, remember
25084 that the flushed part has been flushed, and notice that bytes were
25085 actually written. Reported and fixed pseudonymously. Fixes bug
25086 7708; bugfix on Tor 0.1.0.5-rc.
25087 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
25088 ID: these could be used to create unexpected streams and circuits
25089 which would count as "present" to some parts of Tor but "absent"
25090 to others, leading to zombie circuits and streams or to a bandwidth
25091 denial-of-service. Fixes bug 7889; bugfix on every released version
25092 of Tor. Reported by "oftc_must_be_destroyed".
25093 - Rename all macros in our local copy of queue.h to begin with "TOR_".
25094 This change seems the only good way to permanently prevent conflicts
25095 with queue.h on various operating systems. Fixes bug 8107; bugfix
25098 o Major features (relay):
25099 - Instead of limiting the number of queued onionskins (aka circuit
25100 create requests) to a fixed, hard-to-configure number, we limit
25101 the size of the queue based on how many we expect to be able to
25102 process in a given amount of time. We estimate the time it will
25103 take to process an onionskin based on average processing time
25104 of previous onionskins. Closes ticket 7291. You'll never have to
25105 configure MaxOnionsPending again.
25107 o Major features (portability):
25108 - Resume building correctly with MSVC and Makefile.nmake. This patch
25109 resolves numerous bugs and fixes reported by ultramage, including
25110 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
25111 - Make the ntor and curve25519 code build correctly with MSVC.
25112 Fix on 0.2.4.8-alpha.
25115 - When directory authorities are computing thresholds for flags,
25116 never let the threshold for the Fast flag fall below 4096
25117 bytes. Also, do not consider nodes with extremely low bandwidths
25118 when deciding thresholds for various directory flags. This change
25119 should raise our threshold for Fast relays, possibly in turn
25120 improving overall network performance; see ticket 1854. Resolves
25122 - The Tor client now ignores sub-domain components of a .onion
25123 address. This change makes HTTP "virtual" hosting
25124 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
25125 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
25126 hosted on the same hidden service. Implements proposal 204.
25127 - We compute the overhead from passing onionskins back and forth to
25128 cpuworkers, and report it when dumping statistics in response to
25129 SIGUSR1. Supports ticket 7291.
25131 o Minor features (path selection):
25132 - When deciding whether we have enough descriptors to build circuits,
25133 instead of looking at raw relay counts, look at which fraction
25134 of (bandwidth-weighted) paths we're able to build. This approach
25135 keeps clients from building circuits if their paths are likely to
25136 stand out statistically. The default fraction of paths needed is
25137 taken from the consensus directory; you can override it with the
25138 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
25139 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
25140 and we have GeoIP information, also exclude all nodes with unknown
25141 countries "??" and "A1". This behavior is controlled by the
25142 new GeoIPExcludeUnknown option: you can make such nodes always
25143 excluded with "GeoIPExcludeUnknown 1", and disable the feature
25144 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
25145 gets you the default behavior. Implements feature 7706.
25146 - Path Use Bias: Perform separate accounting for successful circuit
25147 use. Keep separate statistics on stream attempt rates versus stream
25148 success rates for each guard. Provide configurable thresholds to
25149 determine when to emit log messages or disable use of guards that
25150 fail too many stream attempts. Resolves ticket 7802.
25152 o Minor features (log messages):
25153 - When learning a fingerprint for a bridge, log its corresponding
25154 transport type. Implements ticket 7896.
25155 - Improve the log message when "Bug/attack: unexpected sendme cell
25156 from client" occurs, to help us track bug 8093.
25159 - Remove a couple of extraneous semicolons that were upsetting the
25160 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
25161 bugfix on 0.2.2.1-alpha.
25162 - Remove a source of rounding error during path bias count scaling;
25163 don't count cannibalized circuits as used for path bias until we
25164 actually try to use them; and fix a circuit_package_relay_cell()
25165 warning message about n_chan==NULL. Fixes bug 7802.
25166 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
25167 actually link against nacl when we're configured to use it. Fixes
25168 bug 7972; bugfix on 0.2.4.8-alpha.
25169 - Compile correctly with the --disable-curve25519 option. Fixes
25170 bug 8153; bugfix on 0.2.4.8-alpha.
25172 o Build improvements:
25173 - Do not report status verbosely from autogen.sh unless the -v flag
25174 is specified. Fixes issue 4664. Patch from Onizuka.
25175 - Replace all calls to snprintf() outside of src/ext with
25176 tor_snprintf(). Also remove the #define to replace snprintf with
25177 _snprintf on Windows; they have different semantics, and all of
25178 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
25179 - Try to detect if we are ever building on a platform where
25180 memset(...,0,...) does not set the value of a double to 0.0. Such
25181 platforms are permitted by the C standard, though in practice
25182 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
25183 currently support them, but it's better to detect them and fail
25184 than to perform erroneously.
25186 o Removed features:
25187 - Stop exporting estimates of v2 and v3 directory traffic shares
25188 in extrainfo documents. They were unneeded and sometimes inaccurate.
25189 Also stop exporting any v2 directory request statistics. Resolves
25191 - Drop support for detecting and warning about versions of Libevent
25192 before 1.3e. Nothing reasonable ships with them any longer;
25193 warning the user about them shouldn't be needed. Resolves ticket
25196 o Code simplifications and refactoring:
25197 - Rename "isin" functions to "contains", for grammar. Resolves
25199 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
25200 with the natural logarithm function from the system libm. Resolves
25204 Changes in version 0.2.4.9-alpha - 2013-01-15
25205 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
25206 work more robustly.
25209 - Fix backward compatibility logic when receiving an embedded ntor
25210 handshake tunneled in a CREATE cell. This clears up the "Bug:
25211 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
25215 Changes in version 0.2.4.8-alpha - 2013-01-14
25216 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
25217 risks, adds a new stronger and faster circuit handshake, and offers
25218 stronger and faster link encryption when both sides support it.
25221 - Preliminary support for directory guards (proposal 207): when
25222 possible, clients now use their entry guards for non-anonymous
25223 directory requests. This can help prevent client enumeration. Note
25224 that this behavior only works when we have a usable consensus
25225 directory, and when options about what to download are more or less
25226 standard. In the future we should re-bootstrap from our guards,
25227 rather than re-bootstrapping from the preconfigured list of
25228 directory sources that ships with Tor. Resolves ticket 6526.
25229 - Tor relays and clients now support a better CREATE/EXTEND cell
25230 format, allowing the sender to specify multiple address, identity,
25231 and handshake types. Implements Robert Ransom's proposal 200;
25232 closes ticket 7199.
25234 o Major features (new circuit handshake):
25235 - Tor now supports a new circuit extension handshake designed by Ian
25236 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
25237 circuit extension handshake, later called "TAP", was a bit slow
25238 (especially on the relay side), had a fragile security proof, and
25239 used weaker keys than we'd now prefer. The new circuit handshake
25240 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
25241 function, making it significantly more secure than the older
25242 handshake, and significantly faster. Tor can use one of two built-in
25243 pure-C curve25519-donna implementations by Adam Langley, or it
25244 can link against the "nacl" library for a tuned version if present.
25246 The built-in version is very fast for 64-bit systems when building
25247 with GCC. The built-in 32-bit version is still faster than the
25248 old TAP protocol, but using libnacl is better on most such hosts.
25250 Clients don't currently use this protocol by default, since
25251 comparatively few clients support it so far. To try it, set
25252 UseNTorHandshake to 1.
25254 Implements proposal 216; closes ticket 7202.
25256 o Major features (better link encryption):
25257 - Relays can now enable the ECDHE TLS ciphersuites when available
25258 and appropriate. These ciphersuites let us negotiate forward-secure
25259 TLS secret keys more safely and more efficiently than with our
25260 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
25261 public relays prefer the (faster) P224 group, and bridges prefer
25262 the (more common) P256 group; you can override this with the
25265 Enabling these ciphers was a little tricky, since for a long time,
25266 clients had been claiming to support them without actually doing
25267 so, in order to foil fingerprinting. But with the client-side
25268 implementation of proposal 198 in 0.2.3.17-beta, clients can now
25269 match the ciphers from recent Firefox versions *and* list the
25270 ciphers they actually mean, so relays can believe such clients
25271 when they advertise ECDHE support in their TLS ClientHello messages.
25273 This feature requires clients running 0.2.3.17-beta or later,
25274 and requires both sides to be running OpenSSL 1.0.0 or later
25275 with ECC support. OpenSSL 1.0.1, with the compile-time option
25276 "enable-ec_nistp_64_gcc_128", is highly recommended.
25278 Implements the relay side of proposal 198; closes ticket 7200.
25281 - Avoid crashing when, as a relay without IPv6-exit support, a
25282 client insists on getting an IPv6 address or nothing. Fixes bug
25283 7814; bugfix on 0.2.4.7-alpha.
25286 - Improve circuit build timeout handling for hidden services.
25287 In particular: adjust build timeouts more accurately depending
25288 upon the number of hop-RTTs that a particular circuit type
25289 undergoes. Additionally, launch intro circuits in parallel
25290 if they timeout, and take the first one to reply as valid.
25291 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
25292 separate error codes; or at least, don't break for that reason.
25293 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
25294 - Update to the January 2 2013 Maxmind GeoLite Country database.
25296 o Minor features (testing):
25297 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
25298 (P-256) Diffie-Hellman handshakes to src/or/bench.
25299 - Add benchmark functions to test onion handshake performance.
25301 o Minor features (path bias detection):
25302 - Alter the Path Bias log messages to be more descriptive in terms
25303 of reporting timeouts and other statistics.
25304 - Create three levels of Path Bias log messages, as opposed to just
25305 two. These are configurable via consensus as well as via the torrc
25306 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
25307 The default values are 0.70, 0.50, and 0.30 respectively.
25308 - Separate the log message levels from the decision to drop guards,
25309 which also is available via torrc option PathBiasDropGuards.
25310 PathBiasDropGuards still defaults to 0 (off).
25311 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
25312 in combination with PathBiasExtremeRate.
25313 - Increase the default values for PathBiasScaleThreshold and
25314 PathBiasCircThreshold from (200, 20) to (300, 150).
25315 - Add in circuit usage accounting to path bias. If we try to use a
25316 built circuit but fail for any reason, it counts as path bias.
25317 Certain classes of circuits where the adversary gets to pick your
25318 destination node are exempt from this accounting. Usage accounting
25319 can be specifically disabled via consensus parameter or torrc.
25320 - Convert all internal path bias state to double-precision floating
25321 point, to avoid roundoff error and other issues.
25322 - Only record path bias information for circuits that have completed
25323 *two* hops. Assuming end-to-end tagging is the attack vector, this
25324 makes us more resilient to ambient circuit failure without any
25325 detection capability loss.
25327 o Minor bugfixes (log messages):
25328 - Rate-limit the "No circuits are opened. Relaxed timeout for a
25329 circuit with channel state open..." message to once per hour to
25330 keep it from filling the notice logs. Mitigates bug 7799 but does
25331 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
25332 - Avoid spurious warnings when configuring multiple client ports of
25333 which only some are nonlocal. Previously, we had claimed that some
25334 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
25337 o Code simplifications and refactoring:
25338 - Get rid of a couple of harmless clang warnings, where we compared
25339 enums to ints. These warnings are newly introduced in clang 3.2.
25340 - Split the onion.c file into separate modules for the onion queue
25341 and the different handshakes it supports.
25342 - Remove the marshalling/unmarshalling code for sending requests to
25343 cpuworkers over a socket, and instead just send structs. The
25344 recipient will always be the same Tor binary as the sender, so
25345 any encoding is overkill.
25348 Changes in version 0.2.4.7-alpha - 2012-12-24
25349 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
25350 directory mirrors for more robust bootstrapping; fixes more issues where
25351 clients with changing network conditions refuse to make any circuits;
25352 adds initial support for exiting to IPv6 addresses; resumes being able
25353 to update our GeoIP database, and includes the geoip6 file this time;
25354 turns off the client-side DNS cache by default due to privacy risks;
25355 and fixes a variety of other issues.
25357 o Major features (client resilience):
25358 - Add a new "FallbackDir" torrc option to use when we can't use
25359 a directory mirror from the consensus (either because we lack a
25360 consensus, or because they're all down). Currently, all authorities
25361 are fallbacks by default, and there are no other default fallbacks,
25362 but that will change. This option will allow us to give clients a
25363 longer list of servers to try to get a consensus from when first
25364 connecting to the Tor network, and thereby reduce load on the
25365 directory authorities. Implements proposal 206, "Preconfigured
25366 directory sources for bootstrapping". We also removed the old
25367 "FallbackNetworkstatus" option, since we never got it working well
25368 enough to use it. Closes bug 572.
25369 - If we have no circuits open, use a relaxed timeout (the
25370 95-percentile cutoff) until a circuit succeeds. This heuristic
25371 should allow Tor to succeed at building circuits even when the
25372 network connection drastically changes. Should help with bug 3443.
25374 o Major features (IPv6):
25375 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
25376 connectivity, then set the IPv6Exit flag to 1. Also make sure your
25377 exit policy reads as you would like: the address * applies to all
25378 address families, whereas *4 is IPv4 address only, and *6 is IPv6
25379 addresses only. On the client side, you'll need to wait until the
25380 authorities have upgraded, wait for enough exits to support IPv6,
25381 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
25382 ticket 5547, implements proposal 117 as revised in proposal 208.
25384 We DO NOT recommend that clients with actual anonymity needs start
25385 using IPv6 over Tor yet, since not enough exits support it yet.
25387 o Major features (geoip database):
25388 - Maxmind began labelling Tor relays as being in country "A1",
25389 which breaks by-country node selection inside Tor. Now we use a
25390 script to replace "A1" ("Anonymous Proxy") entries in our geoip
25391 file with real country codes. This script fixes about 90% of "A1"
25392 entries automatically and uses manual country code assignments to
25393 fix the remaining 10%. See src/config/README.geoip for details.
25394 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
25395 Country database, as modified above.
25397 o Major bugfixes (client-side DNS):
25398 - Turn off the client-side DNS cache by default. Updating and using
25399 the DNS cache is now configurable on a per-client-port
25400 level. SOCKSPort, DNSPort, etc lines may now contain
25401 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
25402 cache these types of DNS answers when we receive them from an
25403 exit node in response to an application request on this port, and
25404 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
25405 cached DNS answers of these types, we shouldn't use them. It's
25406 potentially risky to use cached DNS answers at the client, since
25407 doing so can indicate to one exit what answers we've gotten
25408 for DNS lookups in the past. With IPv6, this becomes especially
25409 problematic. Using cached DNS answers for requests on the same
25410 circuit would present less linkability risk, since all traffic
25411 on a circuit is already linkable, but it would also provide
25412 little performance benefit: the exit node caches DNS replies
25413 too. Implements a simplified version of Proposal 205. Implements
25416 o Major bugfixes (other):
25417 - Alter circuit build timeout measurement to start at the point
25418 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
25419 initialization). This should make our timeout measurements more
25420 uniform. Previously, we were sometimes including ORconn setup time
25421 in our circuit build time measurements. Should resolve bug 3443.
25422 - Fix an assertion that could trigger in hibernate_go_dormant() when
25423 closing an or_connection_t: call channel_mark_for_close() rather
25424 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
25426 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
25427 7655; bugfix on 0.2.4.6-alpha.
25430 - Add a new torrc option "ServerTransportListenAddr" to let bridge
25431 operators select the address where their pluggable transports will
25432 listen for connections. Resolves ticket 7013.
25433 - Allow an optional $ before the node identity digest in the
25434 controller command GETINFO ns/id/<identity>, for consistency with
25435 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
25436 - Log packaged cell fullness as part of the heartbeat message.
25437 Diagnosis to try to determine the extent of bug 7743.
25439 o Minor features (IPv6):
25440 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
25441 prefer to hand out virtual IPv6 addresses, since there are more of
25442 them and we can't run out. To override this behavior and make IPv4
25443 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
25444 or DNSPort you're using for resolving. Implements ticket 7571.
25445 - AutomapHostsOnResolve responses are now randomized, to avoid
25446 annoying situations where Tor is restarted and applications
25447 connect to the wrong addresses.
25448 - Never try more than 1000 times to pick a new virtual address when
25449 AutomapHostsOnResolve is set. That's good enough so long as we
25450 aren't close to handing out our entire virtual address space;
25451 if you're getting there, it's best to switch to IPv6 virtual
25455 - The ADDRMAP command can no longer generate an ill-formed error
25456 code on a failed MAPADDRESS. It now says "internal" rather than
25457 an English sentence fragment with spaces in the middle. Bugfix on
25458 Tor 0.2.0.19-alpha.
25459 - Fix log messages and comments to avoid saying "GMT" when we mean
25460 "UTC". Fixes bug 6113.
25461 - Compile on win64 using mingw64. Fixes bug 7260; patches from
25463 - Fix a crash when debugging unit tests on Windows: deallocate a
25464 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
25465 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
25468 - The DirServer option is now DirAuthority, for consistency with
25469 current naming patterns. You can still use the old DirServer form.
25471 o Code simplification and refactoring:
25472 - Move the client-side address-map/virtual-address/DNS-cache code
25473 out of connection_edge.c into a new addressmap.c module.
25474 - Remove unused code for parsing v1 directories and "running routers"
25475 documents. Fixes bug 6887.
25478 Changes in version 0.2.3.25 - 2012-11-19
25479 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
25480 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
25481 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
25482 programmer, and friend. Unstinting in his dedication to the cause of
25483 freedom, he inspired and helped many of us as we began our work on
25484 anonymity, and inspires us still. Please honor his memory by writing
25485 software to protect people's freedoms, and by helping others to do so.
25487 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
25488 significantly reduced directory overhead (via microdescriptors),
25489 enormous crypto performance improvements for fast relays on new
25490 enough hardware, a new v3 TLS handshake protocol that can better
25491 resist fingerprinting, support for protocol obfuscation plugins (aka
25492 pluggable transports), better scalability for hidden services, IPv6
25493 support for bridges, performance improvements like allowing clients
25494 to skip the first round-trip on the circuit ("optimistic data") and
25495 refilling token buckets more often, a new "stream isolation" design
25496 to isolate different applications on different circuits, and many
25497 stability, security, and privacy fixes.
25500 - Tor tries to wipe potentially sensitive data after using it, so
25501 that if some subsequent security failure exposes Tor's memory,
25502 the damage will be limited. But we had a bug where the compiler
25503 was eliminating these wipe operations when it decided that the
25504 memory was no longer visible to a (correctly running) program,
25505 hence defeating our attempt at defense in depth. We fix that
25506 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25507 is unlikely to optimize away. Future versions of Tor may use
25508 a less ridiculously heavy approach for this. Fixes bug 7352.
25509 Reported in an article by Andrey Karpov.
25512 - Fix a harmless bug when opting against publishing a relay descriptor
25513 because DisableNetwork is set. Fixes bug 7464; bugfix on
25517 Changes in version 0.2.4.6-alpha - 2012-11-13
25518 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
25519 makes our defense-in-depth memory wiping more reliable, and begins to
25520 count IPv6 addresses in bridge statistics,
25523 - Fix an assertion failure that could occur when closing a connection
25524 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
25526 - Tor tries to wipe potentially sensitive data after using it, so
25527 that if some subsequent security failure exposes Tor's memory,
25528 the damage will be limited. But we had a bug where the compiler
25529 was eliminating these wipe operations when it decided that the
25530 memory was no longer visible to a (correctly running) program,
25531 hence defeating our attempt at defense in depth. We fix that
25532 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25533 is unlikely to optimize away. Future versions of Tor may use
25534 a less ridiculously heavy approach for this. Fixes bug 7352.
25535 Reported in an article by Andrey Karpov.
25538 - Add GeoIP database for IPv6 addresses. The new config option
25540 - Bridge statistics now count bridge clients connecting over IPv6:
25541 bridge statistics files now list "bridge-ip-versions" and
25542 extra-info documents list "geoip6-db-digest". The control protocol
25543 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
25544 implementation by "shkoo", addressing ticket 5055.
25547 - Warn when we are binding low ports when hibernation is enabled;
25548 previously we had warned when we were _advertising_ low ports with
25549 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
25550 - Fix a harmless bug when opting against publishing a relay descriptor
25551 because DisableNetwork is set. Fixes bug 7464; bugfix on
25553 - Add warning message when a managed proxy dies during configuration.
25554 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
25555 - Fix a linking error when building tor-fw-helper without miniupnp.
25556 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
25557 - Check for closing an or_connection_t without going through correct
25558 channel functions; emit a warning and then call
25559 connection_or_close_for_error() so we don't assert as in bugs 7212
25561 - Compile correctly on compilers without C99 designated initializer
25562 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
25563 - Avoid a possible assert that can occur when channel_send_destroy() is
25564 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
25565 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
25566 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
25567 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
25568 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
25570 o Code simplification and refactoring:
25571 - Start using OpenBSD's implementation of queue.h, so that we don't
25572 need to hand-roll our own pointer and list structures whenever we
25573 need them. (We can't rely on a sys/queue.h, since some operating
25574 systems don't have them, and the ones that do have them don't all
25575 present the same extensions.)
25578 Changes in version 0.2.4.5-alpha - 2012-10-25
25579 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
25580 two important security vulnerabilities that could lead to remotely
25581 triggerable relay crashes, fix a major bug that was preventing clients
25582 from choosing suitable exit nodes, and refactor some of our code.
25584 o Major bugfixes (security, also in 0.2.3.24-rc):
25585 - Fix a group of remotely triggerable assertion failures related to
25586 incorrect link protocol negotiation. Found, diagnosed, and fixed
25587 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25589 - Fix a denial of service attack by which any directory authority
25590 could crash all the others, or by which a single v2 directory
25591 authority could crash everybody downloading v2 directory
25592 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25594 o Major bugfixes (also in 0.2.3.24-rc):
25595 - When parsing exit policy summaries from microdescriptors, we had
25596 previously been ignoring the last character in each one, so that
25597 "accept 80,443,8080" would be treated by clients as indicating
25598 a node that allows access to ports 80, 443, and 808. That would
25599 lead to clients attempting connections that could never work,
25600 and ignoring exit nodes that would support their connections. Now
25601 clients parse these exit policy summaries correctly. Fixes bug 7192;
25602 bugfix on 0.2.3.1-alpha.
25604 o Minor bugfixes (also in 0.2.3.24-rc):
25605 - Clients now consider the ClientRejectInternalAddresses config option
25606 when using a microdescriptor consensus stanza to decide whether
25607 an exit relay would allow exiting to an internal address. Fixes
25608 bug 7190; bugfix on 0.2.3.1-alpha.
25611 - Only disable TLS session ticket support when running as a TLS
25612 server. Now clients will blend better with regular Firefox
25613 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
25615 o Code simplification and refactoring:
25616 - Start using OpenBSD's implementation of queue.h (originally by
25618 - Move the entry node code from circuitbuild.c to its own file.
25619 - Move the circuit build timeout tracking code from circuitbuild.c
25623 Changes in version 0.2.3.24-rc - 2012-10-25
25624 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
25625 could lead to remotely triggerable relay crashes, and fixes
25626 a major bug that was preventing clients from choosing suitable exit
25629 o Major bugfixes (security):
25630 - Fix a group of remotely triggerable assertion failures related to
25631 incorrect link protocol negotiation. Found, diagnosed, and fixed
25632 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25634 - Fix a denial of service attack by which any directory authority
25635 could crash all the others, or by which a single v2 directory
25636 authority could crash everybody downloading v2 directory
25637 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25640 - When parsing exit policy summaries from microdescriptors, we had
25641 previously been ignoring the last character in each one, so that
25642 "accept 80,443,8080" would be treated by clients as indicating
25643 a node that allows access to ports 80, 443, and 808. That would
25644 lead to clients attempting connections that could never work,
25645 and ignoring exit nodes that would support their connections. Now
25646 clients parse these exit policy summaries correctly. Fixes bug 7192;
25647 bugfix on 0.2.3.1-alpha.
25650 - Clients now consider the ClientRejectInternalAddresses config option
25651 when using a microdescriptor consensus stanza to decide whether
25652 an exit relay would allow exiting to an internal address. Fixes
25653 bug 7190; bugfix on 0.2.3.1-alpha.
25656 Changes in version 0.2.4.4-alpha - 2012-10-20
25657 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
25658 vulnerability introduced by a change in OpenSSL, fixes a remotely
25659 triggerable assert, and adds new channel_t and circuitmux_t abstractions
25660 that will make it easier to test new connection transport and cell
25661 scheduling algorithms.
25663 o New directory authorities (also in 0.2.3.23-rc):
25664 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25665 authority. Closes ticket 5749.
25667 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
25668 - Disable TLS session tickets. OpenSSL's implementation was giving
25669 our TLS session keys the lifetime of our TLS context objects, when
25670 perfect forward secrecy would want us to discard anything that
25671 could decrypt a link connection as soon as the link connection
25672 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25673 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25674 - Discard extraneous renegotiation attempts once the V3 link
25675 protocol has been initiated. Failure to do so left us open to
25676 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25677 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25679 o Internal abstraction features:
25680 - Introduce new channel_t abstraction between circuits and
25681 or_connection_t to allow for implementing alternate OR-to-OR
25682 transports. A channel_t is an abstract object which can either be a
25683 cell-bearing channel, which is responsible for authenticating and
25684 handshaking with the remote OR and transmitting cells to and from
25685 it, or a listening channel, which spawns new cell-bearing channels
25686 at the request of remote ORs. Implements part of ticket 6465.
25687 - Also new is the channel_tls_t subclass of channel_t, adapting it
25688 to the existing or_connection_t code. The V2/V3 protocol handshaking
25689 code which formerly resided in command.c has been moved below the
25690 channel_t abstraction layer and may be found in channeltls.c now.
25691 Implements the rest of ticket 6465.
25692 - Introduce new circuitmux_t storing the queue of circuits for
25693 a channel; this encapsulates and abstracts the queue logic and
25694 circuit selection policy, and allows the latter to be overridden
25695 easily by switching out a policy object. The existing EWMA behavior
25696 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
25698 o Required libraries:
25699 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
25700 strongly recommended.
25703 - Warn users who run hidden services on a Tor client with
25704 UseEntryGuards disabled that their hidden services will be
25705 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
25706 attack which motivated Tor to support entry guards in the first
25707 place). Resolves ticket 6889.
25708 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
25709 dhill. Resolves ticket 6982.
25710 - Option OutboundBindAddress can be specified multiple times and
25711 accepts IPv6 addresses. Resolves ticket 6876.
25713 o Minor bugfixes (also in 0.2.3.23-rc):
25714 - Don't serve or accept v2 hidden service descriptors over a
25715 relay's DirPort. It's never correct to do so, and disabling it
25716 might make it more annoying to exploit any bugs that turn up in the
25717 descriptor-parsing code. Fixes bug 7149.
25718 - Fix two cases in src/or/transports.c where we were calling
25719 fmt_addr() twice in a parameter list. Bug found by David
25720 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25721 - Fix memory leaks whenever we logged any message about the "path
25722 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25723 - When relays refuse a "create" cell because their queue of pending
25724 create cells is too big (typically because their cpu can't keep up
25725 with the arrival rate), send back reason "resource limit" rather
25726 than reason "internal", so network measurement scripts can get a
25727 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
25730 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
25731 - Free some more still-in-use memory at exit, to make hunting for
25732 memory leaks easier. Resolves bug 7029.
25733 - When a Tor client gets a "truncated" relay cell, the first byte of
25734 its payload specifies why the circuit was truncated. We were
25735 ignoring this 'reason' byte when tearing down the circuit, resulting
25736 in the controller not being told why the circuit closed. Now we
25737 pass the reason from the truncated cell to the controller. Bugfix
25738 on 0.1.2.3-alpha; fixes bug 7039.
25739 - Downgrade "Failed to hand off onionskin" messages to "debug"
25740 severity, since they're typically redundant with the "Your computer
25741 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
25742 - Make clients running with IPv6 bridges connect over IPv6 again,
25743 even without setting new config options ClientUseIPv6 and
25744 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
25745 - Use square brackets around IPv6 addresses in numerous places
25746 that needed them, including log messages, HTTPS CONNECT proxy
25747 requests, TransportProxy statefile entries, and pluggable transport
25748 extra-info lines. Fixes bug 7011; patch by David Fifield.
25750 o Code refactoring and cleanup:
25751 - Source files taken from other packages now reside in src/ext;
25752 previously they were scattered around the rest of Tor.
25753 - Avoid use of reserved identifiers in our C code. The C standard
25754 doesn't like us declaring anything that starts with an
25755 underscore, so let's knock it off before we get in trouble. Fix
25756 for bug 1031; bugfix on the first Tor commit.
25759 Changes in version 0.2.3.23-rc - 2012-10-20
25760 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
25761 vulnerability introduced by a change in OpenSSL, and fixes a variety
25762 of smaller bugs in preparation for the release.
25764 o New directory authorities:
25765 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25766 authority. Closes ticket 5749.
25768 o Major bugfixes (security/privacy):
25769 - Disable TLS session tickets. OpenSSL's implementation was giving
25770 our TLS session keys the lifetime of our TLS context objects, when
25771 perfect forward secrecy would want us to discard anything that
25772 could decrypt a link connection as soon as the link connection
25773 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25774 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25775 - Discard extraneous renegotiation attempts once the V3 link
25776 protocol has been initiated. Failure to do so left us open to
25777 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25778 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25781 - Fix a possible crash bug when checking for deactivated circuits
25782 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25783 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25785 o Minor bugfixes (on 0.2.3.x):
25786 - Fix two cases in src/or/transports.c where we were calling
25787 fmt_addr() twice in a parameter list. Bug found by David
25788 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25789 - Convert an assert in the pathbias code to a log message. The assert
25790 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25791 bugfix on 0.2.3.17-beta.
25792 - Fix memory leaks whenever we logged any message about the "path
25793 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25795 o Minor bugfixes (on 0.2.2.x and earlier):
25796 - Don't serve or accept v2 hidden service descriptors over a relay's
25797 DirPort. It's never correct to do so, and disabling it might
25798 make it more annoying to exploit any bugs that turn up in the
25799 descriptor-parsing code. Fixes bug 7149.
25800 - When relays refuse a "create" cell because their queue of pending
25801 create cells is too big (typically because their cpu can't keep up
25802 with the arrival rate), send back reason "resource limit" rather
25803 than reason "internal", so network measurement scripts can get a
25804 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
25805 - Correct file sizes when reading binary files on Cygwin, to avoid
25806 a bug where Tor would fail to read its state file. Fixes bug 6844;
25807 bugfix on 0.1.2.7-alpha.
25808 - Avoid undefined behavior when parsing the list of supported
25809 rendezvous/introduction protocols in a hidden service descriptor.
25810 Previously, Tor would have confused (as-yet-unused) protocol version
25811 numbers greater than 32 with lower ones on many platforms. Fixes
25812 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25814 o Documentation fixes:
25815 - Clarify that hidden services are TCP only. Fixes bug 6024.
25818 Changes in version 0.2.4.3-alpha - 2012-09-22
25819 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
25820 assertion, resumes letting relays test reachability of their DirPort,
25821 and cleans up a bunch of smaller bugs.
25824 - Fix an assertion failure in tor_timegm() that could be triggered
25825 by a badly formatted directory object. Bug found by fuzzing with
25826 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25829 - Fix a possible crash bug when checking for deactivated circuits
25830 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25831 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25832 - Allow routers to detect that their own DirPorts are running. When
25833 we removed support for versions_supports_begindir, we also
25834 accidentally removed the mechanism we used to self-test our
25835 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
25836 bugfix on 0.2.4.2-alpha.
25838 o Security features:
25839 - Switch to a completely time-invariant approach for picking nodes
25840 weighted by bandwidth. Our old approach would run through the
25841 part of the loop after it had made its choice slightly slower
25842 than it ran through the part of the loop before it had made its
25843 choice. Addresses ticket 6538.
25844 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
25845 by tor2web clients allows hidden services to identify tor2web
25846 clients through their repeated selection of the same rendezvous
25847 and introduction point circuit endpoints (their guards). Resolves
25851 - Enable Tor to read configuration, state, and key information from
25852 a FIFO. Previously Tor would only read from files with a positive
25853 stat.st_size. Code from meejah; fixes bug 6044.
25856 - Correct file sizes when reading binary files on Cygwin, to avoid
25857 a bug where Tor would fail to read its state file. Fixes bug 6844;
25858 bugfix on 0.1.2.7-alpha.
25859 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
25860 bugfix on 0.2.0.3-alpha.
25861 - When complaining about a client port on a public address, log
25862 which address we're complaining about. Fixes bug 4020; bugfix on
25863 0.2.3.3-alpha. Patch by Tom Fitzhenry.
25864 - Convert an assert in the pathbias code to a log message. The assert
25865 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25866 bugfix on 0.2.3.17-beta.
25867 - Our new buildsystem was overzealous about rebuilding manpages: it
25868 would rebuild them all whenever any one of them changed. Now our
25869 dependency checking should be correct. Fixes bug 6843; bugfix on
25871 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
25872 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
25873 - Correct log printout about which address family is preferred
25874 when connecting to a bridge with both an IPv4 and IPv6 OR port.
25875 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
25877 o Minor bugfixes (code cleanliness):
25878 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
25879 with large values. This situation was untriggered, but nevertheless
25880 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
25881 - Reject consensus votes with more than 64 known-flags. We aren't even
25882 close to that limit yet, and our code doesn't handle it correctly.
25883 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
25884 - Avoid undefined behavior when parsing the list of supported
25885 rendezvous/introduction protocols in a hidden service descriptor.
25886 Previously, Tor would have confused (as-yet-unused) protocol version
25887 numbers greater than 32 with lower ones on many platforms. Fixes
25888 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25889 - Fix handling of rendezvous client authorization types over 8.
25890 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
25891 - Fix building with older versions of GCC (2.95, for one) that don't
25892 like preprocessor directives inside macro arguments. Found by
25893 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
25894 - Switch weighted node selection rule from using a list of doubles
25895 to using a list of int64_t. This change should make the process
25896 slightly easier to debug and maintain. Needed to finish ticket 6538.
25898 o Code simplification and refactoring:
25899 - Move the generic "config" code into a new file, and have "config.c"
25900 hold only torrc- and state-related code. Resolves ticket 6823.
25901 - Move the core of our "choose a weighted element at random" logic
25902 into its own function, and give it unit tests. Now the logic is
25903 testable, and a little less fragile too.
25904 - Removed the testing_since field of node_t, which hasn't been used
25905 for anything since 0.2.0.9-alpha.
25907 o Documentation fixes:
25908 - Clarify that hidden services are TCP only. Fixes bug 6024.
25909 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
25913 Changes in version 0.2.3.22-rc - 2012-09-11
25914 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
25918 - Fix an assertion failure in tor_timegm() that could be triggered
25919 by a badly formatted directory object. Bug found by fuzzing with
25920 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25923 - Avoid segfault when starting up having run with an extremely old
25924 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25928 Changes in version 0.2.2.39 - 2012-09-11
25929 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
25933 - Fix an assertion failure in tor_timegm() that could be triggered
25934 by a badly formatted directory object. Bug found by fuzzing with
25935 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25936 - Do not crash when comparing an address with port value 0 to an
25937 address policy. This bug could have been used to cause a remote
25938 assertion failure by or against directory authorities, or to
25939 allow some applications to crash clients. Fixes bug 6690; bugfix
25943 Changes in version 0.2.4.2-alpha - 2012-09-10
25944 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
25945 raises the default rate limiting even more, and makes the bootstrapping
25946 log messages less noisy.
25949 - Automatically forward the TCP ports of pluggable transport
25950 proxies using tor-fw-helper if PortForwarding is enabled. Implements
25954 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
25955 to 1GB/1GB. The previous defaults were intended to be "basically
25956 infinite", but it turns out they're now limiting our 100mbit+
25957 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
25958 last time we raised it).
25961 - Detect when we're running with a version of OpenSSL other than the
25962 one we compiled with. This has occasionally given people hard-to-
25964 - Log fewer lines at level "notice" about our OpenSSL and Libevent
25965 versions and capabilities when everything is going right. Resolves
25966 part of ticket 6736.
25967 - Directory authorities no long accept descriptors for any version of
25968 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
25969 These versions are insecure, unsupported, or both. Implements
25973 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
25974 to start with a triple-underscore so the controller won't touch it.
25975 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
25976 - Avoid segfault when starting up having run with an extremely old
25977 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25979 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
25980 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
25981 - Don't follow the NULL pointer if microdescriptor generation fails.
25982 (This does not appear to be triggerable, but it's best to be safe.)
25983 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
25984 - Fix mis-declared dependencies on src/common/crypto.c and
25985 src/or/tor_main.c that could break out-of-tree builds under some
25986 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
25987 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
25988 6778; bugfix on 0.2.4.1-alpha.
25989 - Fix a harmless (in this case) build warning for implicitly
25990 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
25992 o Removed features:
25993 - Now that all versions before 0.2.2.x are disallowed, we no longer
25994 need to work around their missing features. Thus we can remove a
25995 bunch of compatibility code.
25997 o Code refactoring:
25998 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
25999 TCP ports to forward. In the past it only accepted two ports:
26000 the ORPort and the DirPort.
26003 Changes in version 0.2.4.1-alpha - 2012-09-05
26004 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
26005 bridgedb; lets relays use IPv6 addresses and directory authorities
26006 advertise them; and switches to a cleaner build interface.
26008 This is the first alpha release in a new series, so expect there to
26009 be bugs. Users who would rather test out a more stable branch should
26010 stay with 0.2.3.x for now.
26012 o Major features (bridges):
26013 - Bridges now report the pluggable transports they support to the
26014 bridge authority, so it can pass the supported transports on to
26015 bridgedb and/or eventually do reachability testing. Implements
26018 o Major features (IPv6):
26019 - Bridge authorities now accept IPv6 bridge addresses and include
26020 them in network status documents. Implements ticket 5534.
26021 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
26022 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
26023 to happen. Implements ticket 5535.
26024 - All kind of relays, not just bridges, can now advertise an IPv6
26025 OR port. Implements ticket 6362.
26026 - Directory authorities vote on IPv6 OR ports using the new consensus
26027 method 14. Implements ticket 6363.
26029 o Major features (build):
26030 - Switch to a nonrecursive Makefile structure. Now instead of each
26031 Makefile.am invoking other Makefile.am's, there is a master
26032 Makefile.am that includes the others. This change makes our build
26033 process slightly more maintainable, and improves parallelism for
26034 building with make -j. Original patch by Stewart Smith; various
26035 fixes by Jim Meyering.
26036 - Where available, we now use automake's "silent" make rules by
26037 default, so that warnings are easier to spot. You can get the old
26038 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
26040 o Minor features (code security and spec conformance):
26041 - Clear keys and key-derived material left on the stack in
26042 rendservice.c and rendclient.c. Check return value of
26043 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
26044 These fixes should make us more forward-secure against cold-boot
26045 attacks and the like. Fixes bug 2385.
26046 - Reject EXTEND cells sent to nonexistent streams. According to the
26047 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
26048 we were only checking for stream IDs that were currently in use.
26049 Found while hunting for more instances of bug 6271. Bugfix on
26050 0.0.2pre8, which introduced incremental circuit construction.
26052 o Minor features (streamlining);
26053 - No longer include the "opt" prefix when generating routerinfos
26054 or v2 directories: it has been needless since Tor 0.1.2. Closes
26056 - Remove some now-needless code that tried to aggressively flush
26057 OR connections as data was added to them. Since 0.2.0.1-alpha, our
26058 cell queue logic has saved us from the failure mode that this code
26059 was supposed to prevent. Removing this code will limit the number
26060 of baroque control flow paths through Tor's network logic. Reported
26061 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
26063 o Minor features (controller):
26064 - Add a "GETINFO signal/names" control port command. Implements
26066 - Provide default values for all options via "GETINFO config/defaults".
26067 Implements ticket 4971.
26069 o Minor features (IPv6):
26070 - New config option "AuthDirHasIPv6Connectivity 1" that directory
26071 authorities should set if they have IPv6 connectivity and want to
26072 do reachability tests for IPv6 relays. Implements feature 5974.
26073 - A relay with an IPv6 OR port now sends that address in NETINFO
26074 cells (in addition to its other address). Implements ticket 6364.
26076 o Minor features (log messages):
26077 - Omit the first heartbeat log message, because it never has anything
26078 useful to say, and it clutters up the bootstrapping messages.
26079 Resolves ticket 6758.
26080 - Don't log about reloading the microdescriptor cache at startup. Our
26081 bootstrap warnings are supposed to tell the user when there's a
26082 problem, and our bootstrap notices say when there isn't. Resolves
26083 ticket 6759; bugfix on 0.2.2.6-alpha.
26084 - Don't log "I learned some more directory information" when we're
26085 reading cached directory information. Reserve it for when new
26086 directory information arrives in response to a fetch. Resolves
26088 - Prevent rounding error in path bias counts when scaling
26089 them down, and use the correct scale factor default. Also demote
26090 some path bias related log messages down a level and make others
26091 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
26092 - We no longer warn so much when generating manpages from their
26095 o Code simplifications and refactoring:
26096 - Enhance our internal sscanf replacement so that we can eliminate
26097 the last remaining uses of the system sscanf. (Though those uses
26098 of sscanf were safe, sscanf itself is generally error prone, so
26099 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
26101 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
26102 - Move last_reachable and testing_since from routerinfo_t to node_t.
26103 Implements ticket 5529.
26104 - Add replaycache_t structure, functions and unit tests, then refactor
26105 rend_service_introduce() to be more clear to read, improve, debug,
26106 and test. Resolves bug 6177.
26107 - Finally remove support for malloc_good_size and malloc_usable_size.
26108 We had hoped that these functions would let us eke a little more
26109 memory out of our malloc implementation. Unfortunately, the only
26110 implementations that provided these functions are also ones that
26111 are already efficient about not overallocation: they never got us
26112 more than 7 or so bytes per allocation. Removing them saves us a
26113 little code complexity and a nontrivial amount of build complexity.
26115 o New requirements:
26116 - Tor maintainers now require Automake version 1.9 or later to build
26117 Tor from the Git repository. (Automake is not required when building
26118 from a source distribution.)
26121 Changes in version 0.2.3.21-rc - 2012-09-05
26122 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
26123 series. It fixes a trio of potential security bugs, fixes a bug where
26124 we were leaving some of the fast relays out of the microdescriptor
26125 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
26126 and cleans up other smaller issues.
26128 o Major bugfixes (security):
26129 - Tear down the circuit if we get an unexpected SENDME cell. Clients
26130 could use this trick to make their circuits receive cells faster
26131 than our flow control would have allowed, or to gum up the network,
26132 or possibly to do targeted memory denial-of-service attacks on
26133 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
26134 from July 2002, before the release of Tor 0.0.0. We had committed
26135 this patch previously, but we had to revert it because of bug 6271.
26136 Now that 6271 is fixed, this patch appears to work.
26137 - Reject any attempt to extend to an internal address. Without
26138 this fix, a router could be used to probe addresses on an internal
26139 network to see whether they were accepting connections. Fixes bug
26140 6710; bugfix on 0.0.8pre1.
26141 - Do not crash when comparing an address with port value 0 to an
26142 address policy. This bug could have been used to cause a remote
26143 assertion failure by or against directory authorities, or to
26144 allow some applications to crash clients. Fixes bug 6690; bugfix
26148 - Remove the upper bound on microdescriptor length. We were hitting
26149 the limit for routers with complex exit policies or family
26150 declarations, causing clients to not use them. Fixes the first
26151 piece of bug 6404; fix on 0.2.2.6-alpha.
26152 - Detect "ORPort 0" as meaning, uniformly, that we're not running
26153 as a relay. Previously, some of our code would treat the presence
26154 of any ORPort line as meaning that we should act like a relay,
26155 even though our new listener code would correctly not open any
26156 ORPorts for ORPort 0. Similar bugs in other Port options are also
26157 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
26160 - Avoid a pair of double-free and use-after-mark bugs that can
26161 occur with certain timings in canceled and re-received DNS
26162 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
26163 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
26164 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
26165 - Allow one-hop directory fetching circuits the full "circuit build
26166 timeout" period, rather than just half of it, before failing them
26167 and marking the relay down. This fix should help reduce cases where
26168 clients declare relays (or worse, bridges) unreachable because
26169 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
26170 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
26172 - Authorities no longer include any router in their microdescriptor
26173 consensuses for which they couldn't generate or agree on a
26174 microdescriptor. Fixes the second piece of bug 6404; fix on
26176 - Detect and reject attempts to specify both "FooPort" and
26177 "FooPort 0" in the same configuration domain. (It's still okay
26178 to have a FooPort in your configuration file, and use "FooPort 0"
26179 on the command line to disable it.) Fixes the second half of bug
26180 6507; bugfix on 0.2.3.3-alpha.
26181 - Make wildcarded addresses (that is, ones beginning with "*.") work
26182 when provided via the controller's MapAddress command. Previously,
26183 they were accepted, but we never actually noticed that they were
26184 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
26185 - Avoid crashing on a malformed state file where EntryGuardPathBias
26186 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
26187 - Add a (probably redundant) memory clear between iterations of
26188 the router status voting loop, to prevent future coding errors
26189 where data might leak between iterations of the loop. Resolves
26192 o Minor bugfixes (log messages):
26193 - Downgrade "set buildtimeout to low value" messages to "info"
26194 severity; they were never an actual problem, there was never
26195 anything reasonable to do about them, and they tended to spam logs
26196 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
26197 - Downgrade path-bias warning messages to "info". We'll try to get
26198 them working better in 0.2.4. Add internal circuit construction
26199 state to protect against the noisy warn message "Unexpectedly high
26200 circuit_successes". Also add some additional rate-limited notice
26201 messages to help determine the root cause of the warn. Fixes bug
26202 6475. Bugfix against 0.2.3.17-beta.
26203 - Move log message when unable to find a microdesc in a routerstatus
26204 entry to parse time. Previously we'd spam this warning every time
26205 we tried to figure out which microdescriptors to download. Fixes
26206 the third piece of bug 6404; fix on 0.2.3.18-rc.
26209 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
26210 change when the authority is deciding whether to accept a newly
26211 uploaded descriptor. Implements ticket 6423.
26212 - Add missing documentation for consensus and microdesc files.
26213 Resolves ticket 6732.
26216 Changes in version 0.2.2.38 - 2012-08-12
26217 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
26218 attack that could in theory leak path information.
26221 - Avoid an uninitialized memory read when reading a vote or consensus
26222 document that has an unrecognized flavor name. This read could
26223 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
26224 - Try to leak less information about what relays a client is
26225 choosing to a side-channel attacker. Previously, a Tor client would
26226 stop iterating through the list of available relays as soon as it
26227 had chosen one, thus finishing a little earlier when it picked
26228 a router earlier in the list. If an attacker can recover this
26229 timing information (nontrivial but not proven to be impossible),
26230 they could learn some coarse-grained information about which relays
26231 a client was picking (middle nodes in particular are likelier to
26232 be affected than exits). The timing attack might be mitigated by
26233 other factors (see bug 6537 for some discussion), but it's best
26234 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
26237 Changes in version 0.2.3.20-rc - 2012-08-05
26238 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
26239 series. It fixes a pair of code security bugs and a potential anonymity
26240 issue, updates our RPM spec files, and cleans up other smaller issues.
26243 - Avoid read-from-freed-memory and double-free bugs that could occur
26244 when a DNS request fails while launching it. Fixes bug 6480;
26245 bugfix on 0.2.0.1-alpha.
26246 - Avoid an uninitialized memory read when reading a vote or consensus
26247 document that has an unrecognized flavor name. This read could
26248 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
26249 - Try to leak less information about what relays a client is
26250 choosing to a side-channel attacker. Previously, a Tor client would
26251 stop iterating through the list of available relays as soon as it
26252 had chosen one, thus finishing a little earlier when it picked
26253 a router earlier in the list. If an attacker can recover this
26254 timing information (nontrivial but not proven to be impossible),
26255 they could learn some coarse-grained information about which relays
26256 a client was picking (middle nodes in particular are likelier to
26257 be affected than exits). The timing attack might be mitigated by
26258 other factors (see bug 6537 for some discussion), but it's best
26259 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
26262 - Try to make the warning when giving an obsolete SOCKSListenAddress
26263 a little more useful.
26264 - Terminate active server managed proxies if Tor stops being a
26265 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
26266 - Provide a better error message about possible OSX Asciidoc failure
26267 reasons. Fixes bug 6436.
26268 - Warn when Tor is configured to use accounting in a way that can
26269 link a hidden service to some other hidden service or public
26270 address. Resolves ticket 6490.
26273 - Check return value of fputs() when writing authority certificate
26274 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
26275 - Ignore ServerTransportPlugin lines when Tor is not configured as
26276 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
26277 - When disabling guards for having too high a proportion of failed
26278 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
26282 - Update our default RPM spec files to work with mock and rpmbuild
26283 on RHEL/Fedora. They have an updated set of dependencies and
26284 conflicts, a fix for an ancient typo when creating the "_tor"
26285 user, and better instructions. Thanks to Ondrej Mikle for the
26286 patch series. Fixes bug 6043.
26289 - Make it possible to set the TestingTorNetwork configuration
26290 option using AlternateDirAuthority and AlternateBridgeAuthority
26291 as an alternative to setting DirServer. Addresses ticket 6377.
26294 - Clarify the documentation for the Alternate*Authority options.
26296 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
26298 o Code simplification and refactoring:
26299 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
26300 10 lines. Also, don't nest them. Doing so in the past has
26301 led to hard-to-debug code. The new style is to use the
26302 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
26305 Changes in version 0.2.3.19-rc - 2012-07-06
26306 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
26307 series. It fixes the compile on Windows, reverts to a GeoIP database
26308 that isn't as broken, and fixes a flow control bug that has been around
26309 since the beginning of Tor.
26312 - Fix a bug handling SENDME cells on nonexistent streams that could
26313 result in bizarre window values. Report and patch contributed
26314 pseudonymously. Fixes part of bug 6271. This bug was introduced
26315 before the first Tor release, in svn commit r152.
26316 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
26317 June 2012 database, Maxmind marked many Tor relays as country "A1",
26318 which will cause risky behavior for clients that set EntryNodes
26319 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
26320 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
26321 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
26324 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
26325 bugfix on 0.2.1.10-alpha.
26328 Changes in version 0.2.3.18-rc - 2012-06-28
26329 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
26330 series. It fixes a few smaller bugs, but generally appears stable.
26331 Please test it and let us know whether it is!
26334 - Allow wildcarded mapaddress targets to be specified on the
26335 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
26336 - Make our linker option detection code more robust against linkers
26337 such as on FreeBSD 8, where a bad combination of options completes
26338 successfully but makes an unrunnable binary. Fixes bug 6173;
26339 bugfix on 0.2.3.17-beta.
26341 o Minor bugfixes (on 0.2.2.x and earlier):
26342 - Avoid a false positive in the util/threads unit test by increasing
26343 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
26344 - Replace "Sending publish request" log messages with "Launching
26345 upload", so that they no longer confusingly imply that we're
26346 sending something to a directory we might not even be connected
26347 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
26348 - Make sure to set *socket_error in all error cases in
26349 connection_connect(), so it can't produce a warning about
26350 errno being zero from errno_to_orconn_end_reason(). Bugfix on
26351 0.2.1.1-alpha; resolves ticket 6028.
26352 - Downgrade "Got a certificate, but we already have it" log messages
26353 from warning to info, except when we're a dirauth. Fixes bug 5238;
26354 bugfix on 0.2.1.7-alpha.
26355 - When checking for requested signatures on the latest consensus
26356 before serving it to a client, make sure to check the right
26357 consensus flavor. Bugfix on 0.2.2.6-alpha.
26358 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
26359 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
26361 o Minor bugfixes (on 0.2.3.x):
26362 - Make format_helper_exit_status() avoid unnecessary space padding
26363 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
26365 - Downgrade a message about cleaning the microdescriptor cache to
26366 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
26367 - Log a BUG message at severity INFO if we have a networkstatus with
26368 a missing entry for some microdescriptor. Continues on a patch
26370 - Improve the log message when a managed proxy fails to launch. Fixes
26371 bug 5099; bugfix on 0.2.3.6-alpha.
26372 - Don't do DNS lookups when parsing corrupted managed proxy protocol
26373 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
26374 - When formatting wildcarded address mappings for the controller,
26375 be sure to include "*." as appropriate. Partially fixes bug 6244;
26376 bugfix on 0.2.3.9-alpha.
26377 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
26378 Bugfix on 0.2.3.13-alpha.
26379 - Stop logging messages about running with circuit timeout learning
26380 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
26381 - Disable a spurious warning about reading on a marked and flushing
26382 connection. We shouldn't be doing that, but apparently we
26383 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
26384 - Fix a bug that stopped AllowDotExit from working on addresses
26385 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
26388 o Code simplification, refactoring, unit tests:
26389 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
26390 Libevent's notion of cached time when possible.
26391 - Remove duplicate code for invoking getrlimit() from control.c.
26392 - Add a unit test for the environment_variable_names_equal function.
26395 - Document the --defaults-torrc option, and the new (in 0.2.3)
26396 semantics for overriding, extending, and clearing lists of
26397 options. Closes bug 4748.
26400 Changes in version 0.2.3.17-beta - 2012-06-15
26401 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
26402 gets our TLS handshake back on track for being able to blend in with
26403 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
26404 with Vidalia, and otherwise continues to get us closer to a release
26408 - Enable gcc and ld hardening by default. Resolves ticket 5210.
26409 - Update TLS cipher list to match Firefox 8 and later. Resolves
26411 - Implement the client side of proposal 198: remove support for
26412 clients falsely claiming to support standard ciphersuites that
26413 they can actually provide. As of modern OpenSSL versions, it's not
26414 necessary to fake any standard ciphersuite, and doing so prevents
26415 us from using better ciphersuites in the future, since servers
26416 can't know whether an advertised ciphersuite is really supported or
26417 not. Some hosts -- notably, ones with very old versions of OpenSSL
26418 or where OpenSSL has been built with ECC disabled -- will stand
26419 out because of this change; TBB users should not be affected.
26422 - Change the default value for DynamicDHGroups (introduced in
26423 0.2.3.9-alpha) to 0. This feature can make Tor relays less
26424 identifiable by their use of the mod_ssl DH group, but at
26425 the cost of some usability (#4721) and bridge tracing (#6087)
26426 regressions. Resolves ticket 5598.
26427 - Send a CRLF at the end of each STATUS_* control protocol event. This
26428 bug tickled a bug in Vidalia which would make it freeze. Fixes
26429 bug 6094; bugfix on 0.2.3.16-alpha.
26432 - Disable writing on marked-for-close connections when they are
26433 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
26434 bug 5263; bugfix on 0.0.2pre13, where we first added a special
26435 case for flushing marked connections.
26436 - Detect SSL handshake even when the initial attempt to write the
26437 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
26438 - Change the AllowDotExit rules so they should actually work.
26439 We now enforce AllowDotExit only immediately after receiving an
26440 address via SOCKS or DNSPort: other sources are free to provide
26441 .exit addresses after the resolution occurs. Fixes bug 3940;
26442 bugfix on 0.2.2.1-alpha.
26443 - Fix a (harmless) integer overflow in cell statistics reported by
26444 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
26445 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
26446 right places and never depends on the consensus parameters or
26447 computes adaptive timeouts when it is disabled. Fixes bug 5049;
26448 bugfix on 0.2.2.14-alpha.
26449 - When building Tor on Windows with -DUNICODE (not default), ensure
26450 that error messages, filenames, and DNS server names are always
26451 NUL-terminated when we convert them to a single-byte encoding.
26452 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
26453 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
26454 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
26455 - Fix an edge case where TestingTorNetwork is set but the authorities
26456 and relays all have an uptime of zero, where the private Tor network
26457 could briefly lack support for hidden services. Fixes bug 3886;
26458 bugfix on 0.2.2.18-alpha.
26459 - Correct the manpage's descriptions for the default values of
26460 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
26462 - Fix the documentation for the --hush and --quiet command line
26463 options, which changed their behavior back in 0.2.3.3-alpha.
26464 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
26468 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
26469 more information to it, so that we can track it down in case it
26470 returns again. Mitigates bug 5235.
26471 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
26472 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
26473 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
26474 - Warn the user when HTTPProxy, but no other proxy type, is
26475 configured. This can cause surprising behavior: it doesn't send
26476 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
26477 directory traffic only. Resolves ticket 4663.
26478 - Issue a notice if a guard completes less than 40% of your circuits.
26479 Threshold is configurable by torrc option PathBiasNoticeRate and
26480 consensus parameter pb_noticepct. There is additional, off-by-
26481 default code to disable guards which fail too many circuits.
26482 Addresses ticket 5458.
26483 - Update to the June 6 2012 Maxmind GeoLite Country database.
26485 o Code simplifications and refactoring:
26486 - Remove validate_pluggable_transports_config(): its warning
26487 message is now handled by connection_or_connect().
26490 Changes in version 0.2.2.37 - 2012-06-06
26491 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
26492 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26496 - Work around a bug in OpenSSL that broke renegotiation with TLS
26497 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26498 the v2 Tor connection protocol when both sides were using OpenSSL
26499 1.0.1 would fail. Resolves ticket 6033.
26500 - When waiting for a client to renegotiate, don't allow it to add
26501 any bytes to the input buffer. This fixes a potential DoS issue.
26502 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26503 - Fix an edge case where if we fetch or publish a hidden service
26504 descriptor, we might build a 4-hop circuit and then use that circuit
26505 for exiting afterwards -- even if the new last hop doesn't obey our
26506 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26509 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26510 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26513 - Tell GCC and Clang to check for any errors in format strings passed
26514 to the tor_v*(print|scan)f functions.
26517 Changes in version 0.2.3.16-alpha - 2012-06-05
26518 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
26519 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26520 currently). It also fixes a variety of smaller bugs and other cleanups
26521 that get us closer to a release candidate.
26523 o Major bugfixes (general):
26524 - Work around a bug in OpenSSL that broke renegotiation with TLS
26525 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26526 the v2 Tor connection protocol when both sides were using OpenSSL
26527 1.0.1 would fail. Resolves ticket 6033.
26528 - When waiting for a client to renegotiate, don't allow it to add
26529 any bytes to the input buffer. This fixes a potential DoS issue.
26530 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26531 - Pass correct OR address to managed proxies (like obfsproxy),
26532 even when ORListenAddress is used. Fixes bug 4865; bugfix on
26534 - The advertised platform of a router now includes only its operating
26535 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
26536 service pack level (for Windows) or its CPU architecture (for Unix).
26537 We also no longer include the "git-XYZ" tag in the version. Resolves
26540 o Major bugfixes (clients):
26541 - If we are unable to find any exit that supports our predicted ports,
26542 stop calling them predicted, so that we don't loop and build
26543 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
26544 which introduced predicted ports.
26545 - Fix an edge case where if we fetch or publish a hidden service
26546 descriptor, we might build a 4-hop circuit and then use that circuit
26547 for exiting afterwards -- even if the new last hop doesn't obey our
26548 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26549 - Check at each new consensus whether our entry guards were picked
26550 long enough ago that we should rotate them. Previously, we only
26551 did this check at startup, which could lead to us holding a guard
26552 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
26553 - When fetching a bridge descriptor from a bridge authority,
26554 always do so anonymously, whether we have been able to open
26555 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
26556 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
26557 but we'll need to wait for bug 6010 before it's actually usable.
26559 o Major bugfixes (directory authorities):
26560 - When computing weight parameters, behave more robustly in the
26561 presence of a bad bwweightscale value. Previously, the authorities
26562 would crash if they agreed on a sufficiently broken weight_scale
26563 value: now, they use a reasonable default and carry on. Partial
26564 fix for 5786; bugfix on 0.2.2.17-alpha.
26565 - Check more thoroughly to prevent a rogue authority from
26566 double-voting on any consensus directory parameter. Previously,
26567 authorities would crash in this case if the total number of
26568 votes for any parameter exceeded the number of active voters,
26569 but would let it pass otherwise. Partial fix for bug 5786; bugfix
26573 - Rate-limit log messages when asked to connect anonymously to
26574 a private address. When these hit, they tended to hit fast and
26575 often. Also, don't bother trying to connect to addresses that we
26576 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
26577 reply makes us think we have been lied to, even when the address the
26578 client tried to connect to was "localhost." Resolves ticket 2822.
26579 - Allow packagers to insert an extra string in server descriptor
26580 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
26581 Resolves the rest of ticket 2988.
26582 - Raise the threshold of server descriptors needed (75%) and exit
26583 server descriptors needed (50%) before we will declare ourselves
26584 bootstrapped. This will make clients start building circuits a
26585 little later, but makes the initially constructed circuits less
26586 skewed and less in conflict with further directory fetches. Fixes
26588 - Close any connection that sends unrecognized junk before the
26589 handshake. Solves an issue noted in bug 4369.
26590 - Improve log messages about managed transports. Resolves ticket 5070.
26591 - Tag a bridge's descriptor as "never to be sent unencrypted".
26592 This shouldn't matter, since bridges don't open non-anonymous
26593 connections to the bridge authority and don't allow unencrypted
26594 directory connections from clients, but we might as well make
26595 sure. Closes bug 5139.
26596 - Expose our view of whether we have gone dormant to the controller,
26597 via a new "GETINFO dormant" value. Torbutton and other controllers
26598 can use this to avoid doing periodic requests through Tor while
26599 it's dormant (bug 4718). Fixes bug 5954.
26600 - Tell GCC and Clang to check for any errors in format strings passed
26601 to the tor_v*(print|scan)f functions.
26602 - Update to the May 1 2012 Maxmind GeoLite Country database.
26604 o Minor bugfixes (already included in 0.2.2.36):
26605 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26606 Fixes bug 5346; bugfix on 0.0.8pre3.
26607 - Correct parsing of certain date types in parse_http_time().
26608 Without this patch, If-Modified-Since would behave
26609 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26610 Esteban Manchado Velázques.
26611 - Make our number-parsing functions always treat too-large values
26612 as an error, even when those values exceed the width of the
26613 underlying type. Previously, if the caller provided these
26614 functions with minima or maxima set to the extreme values of the
26615 underlying integer type, these functions would return those
26616 values on overflow rather than treating overflow as an error.
26617 Fixes part of bug 5786; bugfix on 0.0.9.
26618 - If we hit the error case where routerlist_insert() replaces an
26619 existing (old) server descriptor, make sure to remove that
26620 server descriptor from the old_routers list. Fix related to bug
26621 1776. Bugfix on 0.2.2.18-alpha.
26622 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26623 circuits. Fixes issue 5259.
26625 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
26626 - Prevent a null-pointer dereference when receiving a data cell
26627 for a nonexistent stream when the circuit in question has an
26628 empty deliver window. We don't believe this is triggerable,
26629 since we don't currently allow deliver windows to become empty,
26630 but the logic is tricky enough that it's better to make the code
26631 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
26632 - Fix a memory leak when trying to launch a DNS request when the
26633 network is disabled or the nameservers are unconfigurable. Fixes
26634 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
26635 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
26636 - Don't hold a Windows file handle open for every file mapping;
26637 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
26639 - Avoid O(n^2) performance characteristics when parsing a large
26640 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
26641 - Format more doubles with %f, not %lf. Patch from grarpamp to make
26642 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
26644 - Make our replacement implementation of strtok_r() compatible with
26645 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
26646 bugfix on 0.2.2.1-alpha.
26647 - Fix a NULL-pointer dereference on a badly formed
26648 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
26649 bugfix on 0.2.2.9-alpha.
26650 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26651 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26652 - Defensively refactor rend_mid_rendezvous() so that protocol
26653 violations and length checks happen in the beginning. Fixes
26655 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
26656 that IPv6 stuff will compile on MSVC, and compilation issues
26657 will be easier to track down. Fixes bug 5861.
26659 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
26660 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
26661 resource exhaustion, so that clients can adjust their load to
26662 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
26663 started using END_STREAM_REASON_RESOURCELIMIT.
26664 - Don't check for whether the address we're using for outbound
26665 connections has changed until after the outbound connection has
26666 completed. On Windows, getsockname() doesn't succeed until the
26667 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
26668 - If the configuration tries to set MyFamily on a bridge, refuse to
26669 do so, and warn about the security implications. Fixes bug 4657;
26670 bugfix on 0.2.0.3-alpha.
26671 - If the client fails to set a reasonable set of ciphersuites
26672 during its v2 handshake renegotiation, allow the renegotiation to
26673 continue nevertheless (i.e. send all the required certificates).
26674 Fixes bug 4591; bugfix on 0.2.0.20-rc.
26675 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
26676 option is set to 0 (which Vidalia version 0.2.16 now does when
26677 a SAVECONF attempt fails), perform other actions that SIGHUP
26678 usually causes (like reopening the logs). Fixes bug 5095; bugfix
26680 - If we fail to write a microdescriptor to the disk cache, do not
26681 continue replacing the old microdescriptor file. Fixes bug 2954;
26682 bugfix on 0.2.2.6-alpha.
26683 - Exit nodes don't need to fetch certificates for authorities that
26684 they don't recognize; only directory authorities, bridges,
26685 and caches need to do that. Fixes part of bug 2297; bugfix on
26687 - Correctly handle checking the permissions on the parent
26688 directory of a control socket in the root directory. Bug found
26689 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
26691 - When told to add a bridge with the same digest as a preexisting
26692 bridge but a different addr:port, change the addr:port as
26693 requested. Previously we would not notice the change. Fixes half
26694 of bug 5603; fix on 0.2.2.26-beta.
26695 - End AUTHCHALLENGE error messages (in the control protocol) with
26696 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
26698 o Minor bugfixes (on 0.2.3.x):
26699 - Turn an assertion (that the number of handshakes received as a
26700 server is not < 1) into a warning. Fixes bug 4873; bugfix on
26702 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
26703 we had reversed them when the answer was cached.) Fixes bug
26704 5723; bugfix on 0.2.3.1-alpha.
26705 - Work correctly on Linux systems with accept4 support advertised in
26706 their headers, but without accept4 support in the kernel. Fix
26707 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
26708 - When told to add a bridge with the same addr:port as a preexisting
26709 bridge but a different transport, change the transport as
26710 requested. Previously we would not notice the change. Fixes half
26711 of bug 5603; fix on 0.2.3.2-alpha.
26712 - Avoid a "double-reply" warning when replying to a SOCKS request
26713 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
26714 bugfix on 0.2.3.4-alpha.
26715 - Fix a bug where a bridge authority crashes if it has seen no
26716 directory requests when it's time to write statistics to disk.
26717 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
26719 - Don't try to open non-control listeners when DisableNetwork is set.
26720 Previously, we'd open all listeners, then immediately close them.
26721 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
26722 - Don't abort the managed proxy protocol if the managed proxy
26723 sends us an unrecognized line; ignore it instead. Fixes bug
26724 5910; bugfix on 0.2.3.9-alpha.
26725 - Fix a compile warning in crypto.c when compiling with clang 3.1.
26726 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
26727 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
26728 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
26729 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
26730 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
26731 - Resolve numerous small warnings and build issues with MSVC. Resolves
26734 o Documentation fixes:
26735 - Improve the manual's documentation for the NT Service command-line
26736 options. Addresses ticket 3964.
26737 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
26738 - Document the changes to the ORPort and DirPort options, and the
26739 fact that {OR/Dir}ListenAddress is now unnecessary (and
26740 therefore deprecated). Resolves ticket 5597.
26743 - Remove the torrc.bridge file: we don't use it for anything, and
26744 it had become badly desynchronized from torrc.sample. Resolves
26748 Changes in version 0.2.2.36 - 2012-05-24
26749 Tor 0.2.2.36 updates the addresses for two of the eight directory
26750 authorities, fixes some potential anonymity and security issues,
26751 and fixes several crash bugs.
26753 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
26754 known flaws, and nobody should be using them. You should upgrade. If
26755 you're using a Linux or BSD and its packages are obsolete, stop using
26756 those packages and upgrade anyway.
26758 o Directory authority changes:
26759 - Change IP address for maatuska (v3 directory authority).
26760 - Change IP address for ides (v3 directory authority), and rename
26764 - When building or running with any version of OpenSSL earlier
26765 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26766 versions have a bug (CVE-2011-4576) in which their block cipher
26767 padding includes uninitialized data, potentially leaking sensitive
26768 information to any peer with whom they make a SSLv3 connection. Tor
26769 does not use SSL v3 by default, but a hostile client or server
26770 could force an SSLv3 connection in order to gain information that
26771 they shouldn't have been able to get. The best solution here is to
26772 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26773 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26774 to make sure that the bug can't happen.
26775 - Never use a bridge or a controller-supplied node as an exit, even
26776 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26777 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26778 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26779 - Only build circuits if we have a sufficient threshold of the total
26780 descriptors that are marked in the consensus with the "Exit"
26781 flag. This mitigates an attack proposed by wanoskarnet, in which
26782 all of a client's bridges collude to restrict the exit nodes that
26783 the client knows about. Fixes bug 5343.
26784 - Provide controllers with a safer way to implement the cookie
26785 authentication mechanism. With the old method, if another locally
26786 running program could convince a controller that it was the Tor
26787 process, then that program could trick the controller into telling
26788 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26789 authentication method uses a challenge-response approach to prevent
26790 this attack. Fixes bug 5185; implements proposal 193.
26793 - Avoid logging uninitialized data when unable to decode a hidden
26794 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26795 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26796 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26798 - Fix builds when the path to sed, openssl, or sha1sum contains
26799 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26801 - Correct our replacements for the timeradd() and timersub() functions
26802 on platforms that lack them (for example, Windows). The timersub()
26803 function is used when expiring circuits, while timeradd() is
26804 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26805 bugfix on 0.2.2.24-alpha.
26806 - Fix the SOCKET_OK test that we use to tell when socket
26807 creation fails so that it works on Win64. Fixes part of bug 4533;
26808 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26811 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26812 Fixes bug 5346; bugfix on 0.0.8pre3.
26813 - Make our number-parsing functions always treat too-large values
26814 as an error, even when those values exceed the width of the
26815 underlying type. Previously, if the caller provided these
26816 functions with minima or maxima set to the extreme values of the
26817 underlying integer type, these functions would return those
26818 values on overflow rather than treating overflow as an error.
26819 Fixes part of bug 5786; bugfix on 0.0.9.
26820 - Older Linux kernels erroneously respond to strange nmap behavior
26821 by having accept() return successfully with a zero-length
26822 socket. When this happens, just close the connection. Previously,
26823 we would try harder to learn the remote address: but there was
26824 no such remote address to learn, and our method for trying to
26825 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26826 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26827 - Correct parsing of certain date types in parse_http_time().
26828 Without this patch, If-Modified-Since would behave
26829 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26830 Esteban Manchado Velázques.
26831 - Change the BridgePassword feature (part of the "bridge community"
26832 design, which is not yet implemented) to use a time-independent
26833 comparison. The old behavior might have allowed an adversary
26834 to use timing to guess the BridgePassword value. Fixes bug 5543;
26835 bugfix on 0.2.0.14-alpha.
26836 - Detect and reject certain misformed escape sequences in
26837 configuration values. Previously, these values would cause us
26838 to crash if received in a torrc file or over an authenticated
26839 control port. Bug found by Esteban Manchado Velázquez, and
26840 independently by Robert Connolly from Matta Consulting who further
26841 noted that it allows a post-authentication heap overflow. Patch
26842 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26843 bugfix on 0.2.0.16-alpha.
26844 - Fix a compile warning when using the --enable-openbsd-malloc
26845 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26846 - During configure, detect when we're building with clang version
26847 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26848 CFLAGS. clang doesn't support them yet.
26849 - When sending an HTTP/1.1 proxy request, include a Host header.
26850 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26851 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
26852 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
26853 - If we hit the error case where routerlist_insert() replaces an
26854 existing (old) server descriptor, make sure to remove that
26855 server descriptor from the old_routers list. Fix related to bug
26856 1776. Bugfix on 0.2.2.18-alpha.
26858 o Minor bugfixes (documentation and log messages):
26859 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26860 Fixes bug 4856; bugfix on Tor 0.0.6.
26861 - Update "ClientOnly" man page entry to explain that there isn't
26862 really any point to messing with it. Resolves ticket 5005.
26863 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26864 directory authority option (introduced in Tor 0.2.2.34).
26865 - Downgrade the "We're missing a certificate" message from notice
26866 to info: people kept mistaking it for a real problem, whereas it
26867 is seldom the problem even when we are failing to bootstrap. Fixes
26868 bug 5067; bugfix on 0.2.0.10-alpha.
26869 - Correctly spell "connect" in a log message on failure to create a
26870 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
26871 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26872 circuits. Fixes issue 5259.
26875 - Directory authorities now reject versions of Tor older than
26876 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26877 inclusive. These versions accounted for only a small fraction of
26878 the Tor network, and have numerous known security issues. Resolves
26880 - Update to the May 1 2012 Maxmind GeoLite Country database.
26883 - When sending or relaying a RELAY_EARLY cell, we used to convert
26884 it to a RELAY cell if the connection was using the v1 link
26885 protocol. This was a workaround for older versions of Tor, which
26886 didn't handle RELAY_EARLY cells properly. Now that all supported
26887 versions can handle RELAY_EARLY cells, and now that we're enforcing
26888 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26889 remove this workaround. Addresses bug 4786.
26892 Changes in version 0.2.3.15-alpha - 2012-04-30
26893 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
26894 the development branch build on Windows again.
26896 o Minor bugfixes (on 0.2.2.x and earlier):
26897 - Make sure that there are no unhandled pending TLS errors before
26898 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
26899 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
26900 Bugfix on 0.1.0.5-rc; fixes bug 4528.
26901 - Fix an assert that directory authorities could trigger on sighup
26902 during some configuration state transitions. We now don't treat
26903 it as a fatal error when the new descriptor we just generated in
26904 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
26905 - After we pick a directory mirror, we would refuse to use it if
26906 it's in our ExcludeExitNodes list, resulting in mysterious failures
26907 to bootstrap for people who just wanted to avoid exiting from
26908 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
26909 - When building with --enable-static-tor on OpenBSD, do not
26910 erroneously attempt to link -lrt. Fixes bug 5103.
26912 o Minor bugfixes (on 0.2.3.x):
26913 - When Tor is built with kernel headers from a recent (last few
26914 years) Linux kernel, do not fail to run on older (pre-2.6.28
26915 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
26916 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
26917 and 0.2.3.12-alpha.
26918 - Fix compilation with miniupnpc version 1.6; patch from
26919 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
26920 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
26921 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
26922 - Fix compilation on platforms without unistd.h, or where environ
26923 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
26926 - Directory authorities are now a little more lenient at accepting
26927 older router descriptors, or newer router descriptors that don't
26928 make big changes. This should help ameliorate past and future
26929 issues where routers think they have uploaded valid descriptors,
26930 but the authorities don't think so. Fix for ticket 2479.
26931 - Make the code that clients use to detect an address change be
26932 IPv6-aware, so that it won't fill clients' logs with error
26933 messages when trying to get the IPv4 address of an IPv6
26934 connection. Implements ticket 5537.
26936 o Removed features:
26937 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
26938 authorities needed to use it for a while to keep the network working
26939 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
26940 that was six months ago. As of now, it should no longer be needed
26944 Changes in version 0.2.3.14-alpha - 2012-04-23
26945 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
26946 candidate. It also dramatically speeds up AES: fast relays should
26947 consider switching to the newer OpenSSL library.
26949 o Directory authority changes:
26950 - Change IP address for ides (v3 directory authority), and rename
26954 - Avoid logging uninitialized data when unable to decode a hidden
26955 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26956 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26957 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26959 - If authorities are unable to get a v2 consensus document from other
26960 directory authorities, they no longer fall back to fetching
26961 them from regular directory caches. Fixes bug 5635; bugfix on
26962 0.2.2.26-beta, where routers stopped downloading v2 consensus
26963 documents entirely.
26964 - When we start a Tor client with a normal consensus already cached,
26965 be willing to download a microdescriptor consensus. Fixes bug 4011;
26966 fix on 0.2.3.1-alpha.
26968 o Major features (performance):
26969 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
26970 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
26971 vectorized AES implementations as appropriate. These can be much,
26972 much faster than other AES implementations.
26974 o Minor bugfixes (0.2.2.x and earlier):
26975 - Don't launch more than 10 service-side introduction-point circuits
26976 for a hidden service in five minutes. Previously, we would consider
26977 launching more introduction-point circuits if at least one second
26978 had passed without any introduction-point circuits failing. Fixes
26979 bug 4607; bugfix on 0.0.7pre1.
26980 - Change the BridgePassword feature (part of the "bridge community"
26981 design, which is not yet implemented) to use a time-independent
26982 comparison. The old behavior might have allowed an adversary
26983 to use timing to guess the BridgePassword value. Fixes bug 5543;
26984 bugfix on 0.2.0.14-alpha.
26985 - Enforce correct return behavior of tor_vsscanf() when the '%%'
26986 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
26987 - When sending an HTTP/1.1 proxy request, include a Host header.
26988 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26989 - Don't log that we have "decided to publish new relay descriptor"
26990 unless we are actually publishing a descriptor. Fixes bug 3942;
26991 bugfix on 0.2.2.28-beta.
26993 o Minor bugfixes (0.2.3.x):
26994 - Fix a bug where a bridge authority crashes (on a failed assert)
26995 if it has seen no directory requests when it's time to write
26996 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
26997 - Fix bug stomping on ORPort option NoListen and ignoring option
26998 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
26999 - In the testsuite, provide a large enough buffer in the tor_sscanf
27000 unit test. Otherwise we'd overrun that buffer and crash during
27001 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
27003 - Make sure we create the keys directory if it doesn't exist and we're
27004 about to store the dynamic Diffie-Hellman parameters. Fixes bug
27005 5572; bugfix on 0.2.3.13-alpha.
27006 - Fix a small memory leak when trying to decode incorrect base16
27007 authenticator during SAFECOOKIE authentication. Found by
27008 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
27011 - Add more information to a log statement that might help track down
27012 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
27013 non-IP address" messages (or any Bug messages, for that matter!),
27014 please let us know about it.
27015 - Relays now understand an IPv6 address when they get one from a
27016 directory server. Resolves ticket 4875.
27017 - Resolve IPv6 addresses in bridge and entry statistics to country
27018 code "??" which means we at least count them. Resolves ticket 5053;
27019 improves on 0.2.3.9-alpha.
27020 - Update to the April 3 2012 Maxmind GeoLite Country database.
27021 - Begin a doc/state-contents.txt file to explain the contents of
27022 the Tor state file. Fixes bug 2987.
27024 o Default torrc changes:
27025 - Stop listing "socksport 9050" in torrc.sample. We open a socks
27026 port on 9050 by default anyway, so this should not change anything
27028 - Stop mentioning the deprecated *ListenAddress options in
27029 torrc.sample. Fixes bug 5438.
27030 - Document unit of bandwidth related options in sample torrc.
27033 o Removed features:
27034 - The "torify" script no longer supports the "tsocks" socksifier
27035 tool, since tsocks doesn't support DNS and UDP right for Tor.
27036 Everyone should be using torsocks instead. Fixes bugs 3530 and
27037 5180. Based on a patch by "ugh".
27039 o Code refactoring:
27040 - Change the symmetric cipher interface so that creating and
27041 initializing a stream cipher are no longer separate functions.
27042 - Remove all internal support for unpadded RSA. We never used it, and
27043 it would be a bad idea to start.
27046 Changes in version 0.2.3.13-alpha - 2012-03-26
27047 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
27048 in managed pluggable transports, as well as providing other cleanups
27049 that get us closer to a release candidate.
27051 o Directory authority changes:
27052 - Change IP address for maatuska (v3 directory authority).
27055 - Provide controllers with a safer way to implement the cookie
27056 authentication mechanism. With the old method, if another locally
27057 running program could convince a controller that it was the Tor
27058 process, then that program could trick the controller into telling
27059 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
27060 authentication method uses a challenge-response approach to prevent
27061 this attack. Fixes bug 5185, implements proposal 193.
27062 - Never use a bridge or a controller-supplied node as an exit, even
27063 if its exit policy allows it. Found by wanoskarnet. Fixes bug
27064 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
27065 and 0.2.0.3-alpha (for bridge-purpose descriptors).
27066 - Only build circuits if we have a sufficient threshold of the total
27067 descriptors that are marked in the consensus with the "Exit"
27068 flag. This mitigates an attack proposed by wanoskarnet, in which
27069 all of a client's bridges collude to restrict the exit nodes that
27070 the client knows about. Fixes bug 5343.
27072 o Major bugfixes (on Tor 0.2.3.x):
27073 - Avoid an assert when managed proxies like obfsproxy are configured,
27074 and we receive HUP signals or setconf attempts too rapidly. This
27075 situation happens most commonly when Vidalia tries to attach to
27076 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
27077 bugfix on 0.2.3.6-alpha.
27078 - Fix a relay-side pluggable transports bug where managed proxies were
27079 unreachable from the Internet, because Tor asked them to bind on
27080 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
27081 - Stop discarding command-line arguments when TestingTorNetwork
27082 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
27083 0.2.3.9-alpha, where task 4552 added support for two layers of
27085 - Resume allowing the unit tests to run in gdb. This was accidentally
27086 made impossible when the DisableDebuggerAttachment option was
27087 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
27088 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
27089 0.2.3.11-alpha. Reported by Anthony G. Basile.
27091 o Minor bugfixes (on 0.2.2.x and earlier):
27092 - Ensure we don't cannibalize circuits that are longer than three hops
27093 already, so we don't end up making circuits with 5 or more
27094 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
27095 0.1.0.1-rc which introduced cannibalization.
27096 - Detect and reject certain misformed escape sequences in
27097 configuration values. Previously, these values would cause us
27098 to crash if received in a torrc file or over an authenticated
27099 control port. Bug found by Esteban Manchado Velázquez, and
27100 independently by Robert Connolly from Matta Consulting who further
27101 noted that it allows a post-authentication heap overflow. Patch
27102 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
27103 bugfix on 0.2.0.16-alpha.
27104 - Fix a compile warning when using the --enable-openbsd-malloc
27105 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
27106 - Directory caches no longer refuse to clean out descriptors because
27107 of missing v2 networkstatus documents, unless they're configured
27108 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
27109 0.2.2.26-beta. Patch by Daniel Bryg.
27110 - Update to the latest version of the tinytest unit testing framework.
27111 This includes a couple of bugfixes that can be relevant for
27112 running forked unit tests on Windows, and removes all reserved
27115 o Minor bugfixes (on 0.2.3.x):
27116 - On a failed pipe() call, don't leak file descriptors. Fixes bug
27117 4296; bugfix on 0.2.3.1-alpha.
27118 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
27119 until after we have received a CERTS cell. Fixes bug 4361; bugfix
27120 on 0.2.3.6-alpha. Patch by "frosty".
27121 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
27122 option, so that the IP stack doesn't decide to use it for IPv4
27123 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
27124 - Ensure that variables set in Tor's environment cannot override
27125 environment variables that Tor passes to a managed
27126 pluggable-transport proxy. Previously, Tor would pass every
27127 variable in its environment to managed proxies along with the new
27128 ones, in such a way that on many operating systems, the inherited
27129 environment variables would override those which Tor tried to
27130 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
27131 bugfix on 0.2.3.9-alpha for Windows.
27134 - A wide variety of new unit tests by Esteban Manchado Velázquez.
27135 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
27136 - Update to the March 6 2012 Maxmind GeoLite Country database.
27139 Changes in version 0.2.3.12-alpha - 2012-02-13
27140 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
27141 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
27142 when Tor is configured to use a pluggable transport like obfsproxy.
27145 - Fix builds when the path to sed, openssl, or sha1sum contains
27146 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
27148 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
27149 connections. This change should allow busy exit relays to stop
27150 running out of available sockets as quickly. Fixes bug 4950;
27151 bugfix on 0.2.2.26-beta.
27152 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
27153 would ask the bridge for microdescriptors, which are only supported
27154 in 0.2.3.x, and then fail to bootstrap when it didn't get the
27155 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
27156 - Properly set up obfsproxy's environment when in managed mode. The
27157 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
27158 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
27159 5076 and 5082; bugfix on 0.2.3.6-alpha.
27162 - Use the dead_strip option when building Tor on OS X. This reduces
27163 binary size by almost 19% when linking openssl and libevent
27164 statically, which we do for Tor Browser Bundle.
27165 - Fix broken URLs in the sample torrc file, and tell readers about
27166 the OutboundBindAddress, ExitPolicyRejectPrivate, and
27167 PublishServerDescriptor options. Addresses bug 4652.
27168 - Update to the February 7 2012 Maxmind GeoLite Country database.
27171 - Downgrade the "We're missing a certificate" message from notice
27172 to info: people kept mistaking it for a real problem, whereas it
27173 is seldom the problem even when we are failing to bootstrap. Fixes
27174 bug 5067; bugfix on 0.2.0.10-alpha.
27175 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
27176 managed pluggable transport server proxy's environment.
27177 Previously, we would put it there, even though Tor doesn't
27178 implement an 'extended server port' yet, and even though Tor
27179 almost certainly isn't listening at that address. For now, we set
27180 it to an empty string to avoid crashing older obfsproxies. Bugfix
27182 - Log the heartbeat message every HeartbeatPeriod seconds, not every
27183 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
27184 0.2.3.1-alpha. Bug reported by Scott Bennett.
27185 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
27186 bugfix on 0.2.3.11-alpha.
27187 - Update "ClientOnly" man page entry to explain that there isn't
27188 really any point to messing with it. Resolves ticket 5005.
27189 - Use the correct CVE number for CVE-2011-4576 in our comments and
27190 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
27193 o Code simplifications and refactoring:
27194 - Use the _WIN32 macro throughout our code to detect Windows.
27195 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
27199 Changes in version 0.2.3.11-alpha - 2012-01-22
27200 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
27201 the last step of the plan to limit maximum circuit length, includes
27202 a wide variety of hidden service performance and correctness fixes,
27203 works around an OpenSSL security flaw if your distro is too stubborn
27204 to upgrade, and fixes a bunch of smaller issues.
27207 - Now that Tor 0.2.0.x is completely deprecated, enable the final
27208 part of "Proposal 110: Avoiding infinite length circuits" by
27209 refusing all circuit-extend requests that do not use a relay_early
27210 cell. This change helps Tor resist a class of denial-of-service
27211 attacks by limiting the maximum circuit length.
27212 - Adjust the number of introduction points that a hidden service
27213 will try to maintain based on how long its introduction points
27214 remain in use and how many introductions they handle. Fixes
27216 - Try to use system facilities for enumerating local interface
27217 addresses, before falling back to our old approach (which was
27218 binding a UDP socket, and calling getsockname() on it). That
27219 approach was scaring OS X users whose draconian firewall
27220 software warned about binding to UDP sockets, regardless of
27221 whether packets were sent. Now we try to use getifaddrs(),
27222 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
27223 system supports. Resolves ticket 1827.
27225 o Major security workaround:
27226 - When building or running with any version of OpenSSL earlier
27227 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
27228 versions have a bug (CVE-2011-4576) in which their block cipher
27229 padding includes uninitialized data, potentially leaking sensitive
27230 information to any peer with whom they make a SSLv3 connection. Tor
27231 does not use SSL v3 by default, but a hostile client or server
27232 could force an SSLv3 connection in order to gain information that
27233 they shouldn't have been able to get. The best solution here is to
27234 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
27235 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
27236 to make sure that the bug can't happen.
27239 - Fix the SOCKET_OK test that we use to tell when socket
27240 creation fails so that it works on Win64. Fixes part of bug 4533;
27241 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
27242 - Correct our replacements for the timeradd() and timersub() functions
27243 on platforms that lack them (for example, Windows). The timersub()
27244 function is used when expiring circuits, while timeradd() is
27245 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
27246 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
27247 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
27248 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
27249 bug at runtime, not compile time, because some distributions hack
27250 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
27251 on 0.2.3.9-alpha. Found by Pascal.
27253 o Minor features (controller):
27254 - Use absolute path names when reporting the torrc filename in the
27255 control protocol, so a controller can more easily find the torrc
27256 file. Resolves bug 1101.
27257 - Extend the control protocol to report flags that control a circuit's
27258 path selection in CIRC events and in replies to 'GETINFO
27259 circuit-status'. Implements part of ticket 2411.
27260 - Extend the control protocol to report the hidden service address
27261 and current state of a hidden-service-related circuit in CIRC
27262 events and in replies to 'GETINFO circuit-status'. Implements part
27264 - When reporting the path to the cookie file to the controller,
27265 give an absolute path. Resolves ticket 4881.
27266 - Allow controllers to request an event notification whenever a
27267 circuit is cannibalized or its purpose is changed. Implements
27268 part of ticket 3457.
27269 - Include the creation time of a circuit in CIRC and CIRC2
27270 control-port events and the list produced by the 'GETINFO
27271 circuit-status' control-port command.
27273 o Minor features (directory authorities):
27274 - Directory authorities now reject versions of Tor older than
27275 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
27276 inclusive. These versions accounted for only a small fraction of
27277 the Tor network, and have numerous known security issues. Resolves
27279 - Authority operators can now vote for all relays in a given
27280 set of countries to be BadDir/BadExit/Invalid/Rejected.
27281 - Provide two consensus parameters (FastFlagMinThreshold and
27282 FastFlagMaxThreshold) to control the range of allowable bandwidths
27283 for the Fast directory flag. These allow authorities to run
27284 experiments on appropriate requirements for being a "Fast" node.
27285 The AuthDirFastGuarantee config value still applies. Implements
27287 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
27288 directory authority option (introduced in Tor 0.2.2.34).
27290 o Minor features (other):
27291 - Don't disable the DirPort when we cannot exceed our AccountingMax
27292 limit during this interval because the effective bandwidthrate is
27293 low enough. This is useful in a situation where AccountMax is only
27294 used as an additional safeguard or to provide statistics.
27295 - Prepend an informative header to generated dynamic_dh_params files.
27296 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
27297 EntryNodes will have no effect. Resolves issue 2571.
27298 - Log more useful messages when we fail to disable debugger
27300 - Log which authority we're missing votes from when we go to fetch
27301 them from the other auths.
27302 - Log (at debug level) whenever a circuit's purpose is changed.
27303 - Add missing documentation for the MaxClientCircuitsPending,
27304 UseMicrodescriptors, UserspaceIOCPBuffers, and
27305 _UseFilteringSSLBufferevents options, all introduced during
27306 the 0.2.3.x series.
27307 - Update to the January 3 2012 Maxmind GeoLite Country database.
27309 o Minor bugfixes (hidden services):
27310 - Don't close hidden service client circuits which have almost
27311 finished connecting to their destination when they reach
27312 the normal circuit-build timeout. Previously, we would close
27313 introduction circuits which are waiting for an acknowledgement
27314 from the introduction point, and rendezvous circuits which have
27315 been specified in an INTRODUCE1 cell sent to a hidden service,
27316 after the normal CBT. Now, we mark them as 'timed out', and launch
27317 another rendezvous attempt in parallel. This behavior change can
27318 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
27319 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
27320 - Don't close hidden-service-side rendezvous circuits when they
27321 reach the normal circuit-build timeout. This behavior change can
27322 be disabled using the new
27323 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
27324 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
27325 - Make sure we never mark the wrong rendezvous circuit as having
27326 had its introduction cell acknowledged by the introduction-point
27327 relay. Previously, when we received an INTRODUCE_ACK cell on a
27328 client-side hidden-service introduction circuit, we might have
27329 marked a rendezvous circuit other than the one we specified in
27330 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
27331 a warning message and interfered with the hidden service
27332 connection-establishment process. Fixes bug 4759; bugfix on
27333 0.2.3.3-alpha, when we added the stream-isolation feature which
27334 might cause Tor to open multiple rendezvous circuits for the same
27336 - Don't trigger an assertion failure when we mark a new client-side
27337 hidden-service introduction circuit for close during the process
27338 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
27341 o Minor bugfixes (log messages):
27342 - Correctly spell "connect" in a log message on failure to create a
27343 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
27345 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
27346 Fixes bug 4856; bugfix on Tor 0.0.6.
27347 - Fix the log message describing how we work around discovering
27348 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
27349 4837; bugfix on 0.2.2.9-alpha.
27350 - When logging about a disallowed .exit name, do not also call it
27351 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
27353 o Minor bugfixes (build fixes):
27354 - During configure, detect when we're building with clang version
27355 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
27356 CFLAGS. clang doesn't support them yet.
27357 - During configure, search for library containing cos function as
27358 libm lives in libcore on some platforms (BeOS/Haiku). Linking
27359 against libm was hard-coded before. Fixes the first part of bug
27360 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
27362 - Detect attempts to build Tor on (as yet hypothetical) versions
27363 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
27364 fix for bug 4533. Bugfix on 0.2.2.28-beta.
27365 - Preprocessor directives should not be put inside the arguments
27366 of a macro. This would break compilation with GCC releases prior
27367 to version 3.3. We would never recommend such an old GCC version,
27368 but it is apparently required for binary compatibility on some
27369 platforms (namely, certain builds of Haiku). Fixes the other part
27370 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
27373 o Minor bugfixes (other):
27374 - Older Linux kernels erroneously respond to strange nmap behavior
27375 by having accept() return successfully with a zero-length
27376 socket. When this happens, just close the connection. Previously,
27377 we would try harder to learn the remote address: but there was
27378 no such remote address to learn, and our method for trying to
27379 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
27380 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
27381 - Fix null-pointer access that could occur if TLS allocation failed.
27382 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
27383 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
27384 accidentally been reverted.
27385 - Fix our implementation of crypto_random_hostname() so it can't
27386 overflow on ridiculously large inputs. (No Tor version has ever
27387 provided this kind of bad inputs, but let's be correct in depth.)
27388 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
27389 - Find more places in the code that should have been testing for
27390 invalid sockets using the SOCKET_OK macro. Required for a fix
27391 for bug 4533. Bugfix on 0.2.2.28-beta.
27392 - Fix an assertion failure when, while running with bufferevents, a
27393 connection finishes connecting after it is marked for close, but
27394 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
27395 - test_util_spawn_background_ok() hardcoded the expected value
27396 for ENOENT to 2. This isn't portable as error numbers are
27397 platform specific, and particularly the hurd has ENOENT at
27398 0x40000002. Construct expected string at runtime, using the correct
27399 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
27400 - Reject attempts to disable DisableDebuggerAttachment while Tor is
27401 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
27402 - Use an appropriate-width type for sockets in tor-fw-helper on
27403 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
27406 - When sending or relaying a RELAY_EARLY cell, we used to convert
27407 it to a RELAY cell if the connection was using the v1 link
27408 protocol. This was a workaround for older versions of Tor, which
27409 didn't handle RELAY_EARLY cells properly. Now that all supported
27410 versions can handle RELAY_EARLY cells, and now that we're enforcing
27411 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
27412 remove this workaround. Addresses bug 4786.
27414 o Code simplifications and refactoring:
27415 - Use OpenSSL's built-in SSL_state_string_long() instead of our
27416 own homebrewed ssl_state_to_string() replacement. Patch from
27417 Emile Snyder. Fixes bug 4653.
27418 - Use macros to indicate OpenSSL versions, so we don't need to worry
27419 about accidental hexadecimal bit shifts.
27420 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
27422 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
27423 - Use the smartlist_add_asprintf() alias more consistently.
27424 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
27425 invalid value, rather than just -1.
27426 - Rename a handful of old identifiers, mostly related to crypto
27427 structures and crypto functions. By convention, our "create an
27428 object" functions are called "type_new()", our "free an object"
27429 functions are called "type_free()", and our types indicate that
27430 they are types only with a final "_t". But a handful of older
27431 types and functions broke these rules, with function names like
27432 "type_create" or "subsystem_op_type", or with type names like
27436 Changes in version 0.2.3.10-alpha - 2011-12-16
27437 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
27438 Tor's buffers code. Absolutely everybody should upgrade.
27440 The bug relied on an incorrect calculation when making data continuous
27441 in one of our IO buffers, if the first chunk of the buffer was
27442 misaligned by just the wrong amount. The miscalculation would allow an
27443 attacker to overflow a piece of heap-allocated memory. To mount this
27444 attack, the attacker would need to either open a SOCKS connection to
27445 Tor's SocksPort (usually restricted to localhost), or target a Tor
27446 instance configured to make its connections through a SOCKS proxy
27447 (which Tor does not do by default).
27449 Good security practice requires that all heap-overflow bugs should be
27450 presumed to be exploitable until proven otherwise, so we are treating
27451 this as a potential code execution attack. Please upgrade immediately!
27452 This bug does not affect bufferevents-based builds of Tor. Special
27453 thanks to "Vektor" for reporting this issue to us!
27455 This release also contains a few minor bugfixes for issues discovered
27459 - Fix a heap overflow bug that could occur when trying to pull
27460 data into the first chunk of a buffer, when that chunk had
27461 already had some data drained from it. Fixes CVE-2011-2778;
27462 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27465 - If we can't attach streams to a rendezvous circuit when we
27466 finish connecting to a hidden service, clear the rendezvous
27467 circuit's stream-isolation state and try to attach streams
27468 again. Previously, we cleared rendezvous circuits' isolation
27469 state either too early (if they were freshly built) or not at all
27470 (if they had been built earlier and were cannibalized). Bugfix on
27471 0.2.3.3-alpha; fixes bug 4655.
27472 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
27473 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
27474 - Fix an assertion failure when a relay with accounting enabled
27475 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
27478 - Update to the December 6 2011 Maxmind GeoLite Country database.
27481 Changes in version 0.2.2.35 - 2011-12-16
27482 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
27483 buffers code. Absolutely everybody should upgrade.
27485 The bug relied on an incorrect calculation when making data continuous
27486 in one of our IO buffers, if the first chunk of the buffer was
27487 misaligned by just the wrong amount. The miscalculation would allow an
27488 attacker to overflow a piece of heap-allocated memory. To mount this
27489 attack, the attacker would need to either open a SOCKS connection to
27490 Tor's SocksPort (usually restricted to localhost), or target a Tor
27491 instance configured to make its connections through a SOCKS proxy
27492 (which Tor does not do by default).
27494 Good security practice requires that all heap-overflow bugs should be
27495 presumed to be exploitable until proven otherwise, so we are treating
27496 this as a potential code execution attack. Please upgrade immediately!
27497 This bug does not affect bufferevents-based builds of Tor. Special
27498 thanks to "Vektor" for reporting this issue to us!
27500 Tor 0.2.2.35 also fixes several bugs in previous versions, including
27501 crash bugs for unusual configurations, and a long-term bug that
27502 would prevent Tor from starting on Windows machines with draconian
27505 With this release, we remind everyone that 0.2.0.x has reached its
27506 formal end-of-life. Those Tor versions have many known flaws, and
27507 nobody should be using them. You should upgrade -- ideally to the
27508 0.2.2.x series. If you're using a Linux or BSD and its packages are
27509 obsolete, stop using those packages and upgrade anyway.
27511 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
27512 longer receive support after some time in early 2012.
27515 - Fix a heap overflow bug that could occur when trying to pull
27516 data into the first chunk of a buffer, when that chunk had
27517 already had some data drained from it. Fixes CVE-2011-2778;
27518 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27519 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27520 that it doesn't attempt to allocate a socketpair. This could cause
27521 some problems on Windows systems with overzealous firewalls. Fix for
27522 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27524 - If we mark an OR connection for close based on a cell we process,
27525 don't process any further cells on it. We already avoid further
27526 reads on marked-for-close connections, but now we also discard the
27527 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27528 which was the first version where we might mark a connection for
27529 close based on processing a cell on it.
27530 - Correctly sanity-check that we don't underflow on a memory
27531 allocation (and then assert) for hidden service introduction
27532 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27533 bugfix on 0.2.1.5-alpha.
27534 - Fix a memory leak when we check whether a hidden service
27535 descriptor has any usable introduction points left. Fixes bug
27536 4424. Bugfix on 0.2.2.25-alpha.
27537 - Don't crash when we're running as a relay and don't have a GeoIP
27538 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
27539 we've had in the 0.2.3.x branch already.
27540 - When running as a client, do not print a misleading (and plain
27541 wrong) log message that we're collecting "directory request"
27542 statistics: clients don't collect statistics. Also don't create a
27543 useless (because empty) stats file in the stats/ directory. Fixes
27544 bug 4353; bugfix on 0.2.2.34.
27547 - Detect failure to initialize Libevent. This fix provides better
27548 detection for future instances of bug 4457.
27549 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27550 function. This was eating up hideously large amounts of time on some
27551 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27552 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27553 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27555 - Don't warn about unused log_mutex in log.c when building with
27556 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27557 0.1.0.6-rc which introduced --disable-threads.
27558 - When configuring, starting, or stopping an NT service, stop
27559 immediately after the service configuration attempt has succeeded
27560 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27561 - When sending a NETINFO cell, include the original address
27562 received for the other side, not its canonical address. Found
27563 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27564 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
27565 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27566 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27567 occurred when a client tried to fetch a descriptor for a bridge
27568 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27569 - Backport fixes for a pair of compilation warnings on Windows.
27570 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
27571 - If we had ever tried to call tor_addr_to_str on an address of
27572 unknown type, we would have done a strdup on an uninitialized
27573 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27574 Reported by "troll_un".
27575 - Correctly detect and handle transient lookup failures from
27576 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27577 Reported by "troll_un".
27578 - Fix null-pointer access that could occur if TLS allocation failed.
27579 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27580 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27581 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27584 - Add two new config options for directory authorities:
27585 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27586 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27587 that is always sufficient to satisfy the bandwidth requirement for
27588 the Guard flag. Now it will be easier for researchers to simulate
27589 Tor networks with different values. Resolves ticket 4484.
27590 - When Tor ignores a hidden service specified in its configuration,
27591 include the hidden service's directory in the warning message.
27592 Previously, we would only tell the user that some hidden service
27593 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27594 - Update to the December 6 2011 Maxmind GeoLite Country database.
27596 o Packaging changes:
27597 - Make it easier to automate expert package builds on Windows,
27598 by removing an absolute path from makensis.exe command.
27601 Changes in version 0.2.1.32 - 2011-12-16
27602 Tor 0.2.1.32 backports important security and privacy fixes for
27603 oldstable. This release is intended only for package maintainers and
27604 others who cannot use the 0.2.2 stable series. All others should be
27605 using Tor 0.2.2.x or newer.
27607 The Tor 0.2.1.x series will reach formal end-of-life some time in
27608 early 2012; we will stop releasing patches for it then.
27610 o Major bugfixes (also included in 0.2.2.x):
27611 - Correctly sanity-check that we don't underflow on a memory
27612 allocation (and then assert) for hidden service introduction
27613 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27614 bugfix on 0.2.1.5-alpha.
27615 - Fix a heap overflow bug that could occur when trying to pull
27616 data into the first chunk of a buffer, when that chunk had
27617 already had some data drained from it. Fixes CVE-2011-2778;
27618 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27621 - Update to the December 6 2011 Maxmind GeoLite Country database.
27624 Changes in version 0.2.3.9-alpha - 2011-12-08
27625 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
27626 a "DisableNetwork" security feature that bundles can use to avoid
27627 touching the network until bridges are configured, moves forward on
27628 the pluggable transport design, fixes a flaw in the hidden service
27629 design that unnecessarily prevented clients with wrong clocks from
27630 reaching hidden services, and fixes a wide variety of other issues.
27633 - Clients can now connect to private bridges over IPv6. Bridges
27634 still need at least one IPv4 address in order to connect to
27635 other relays. Note that we don't yet handle the case where the
27636 user has two bridge lines for the same bridge (one IPv4, one
27637 IPv6). Implements parts of proposal 186.
27638 - New "DisableNetwork" config option to prevent Tor from launching any
27639 connections or accepting any connections except on a control port.
27640 Bundles and controllers can set this option before letting Tor talk
27641 to the rest of the network, for example to prevent any connections
27642 to a non-bridge address. Packages like Orbot can also use this
27643 option to instruct Tor to save power when the network is off.
27644 - Clients and bridges can now be configured to use a separate
27645 "transport" proxy. This approach makes the censorship arms race
27646 easier by allowing bridges to use protocol obfuscation plugins. It
27647 implements the "managed proxy" part of proposal 180 (ticket 3472).
27648 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
27649 implementation. It makes AES_CTR about 7% faster than our old one
27650 (which was about 10% faster than the one OpenSSL used to provide).
27651 Resolves ticket 4526.
27652 - Add a "tor2web mode" for clients that want to connect to hidden
27653 services non-anonymously (and possibly more quickly). As a safety
27654 measure to try to keep users from turning this on without knowing
27655 what they are doing, tor2web mode must be explicitly enabled at
27656 compile time, and a copy of Tor compiled to run in tor2web mode
27657 cannot be used as a normal Tor client. Implements feature 2553.
27658 - Add experimental support for running on Windows with IOCP and no
27659 kernel-space socket buffers. This feature is controlled by a new
27660 "UserspaceIOCPBuffers" config option (off by default), which has
27661 no effect unless Tor has been built with support for bufferevents,
27662 is running on Windows, and has enabled IOCP. This may, in the long
27663 run, help solve or mitigate bug 98.
27664 - Use a more secure consensus parameter voting algorithm. Now at
27665 least three directory authorities or a majority of them must
27666 vote on a given parameter before it will be included in the
27667 consensus. Implements proposal 178.
27670 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
27671 They used to check that the timestamp was within 30 minutes
27672 of their system clock, so they could cap the size of their
27673 replay-detection cache, but that approach unnecessarily refused
27674 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
27675 the v3 intro-point protocol (the first one which sent a timestamp
27676 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
27677 - Only use the EVP interface when AES acceleration is enabled,
27678 to avoid a 5-7% performance regression. Resolves issue 4525;
27679 bugfix on 0.2.3.8-alpha.
27681 o Privacy/anonymity features (bridge detection):
27682 - Make bridge SSL certificates a bit more stealthy by using random
27683 serial numbers, in the same fashion as OpenSSL when generating
27684 self-signed certificates. Implements ticket 4584.
27685 - Introduce a new config option "DynamicDHGroups", enabled by
27686 default, which provides each bridge with a unique prime DH modulus
27687 to be used during SSL handshakes. This option attempts to help
27688 against censors who might use the Apache DH modulus as a static
27689 identifier for bridges. Addresses ticket 4548.
27691 o Minor features (new/different config options):
27692 - New configuration option "DisableDebuggerAttachment" (on by default)
27693 to prevent basic debugging attachment attempts by other processes.
27694 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
27695 - Allow MapAddress directives to specify matches against super-domains,
27696 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
27697 Implements issue 933.
27698 - Slightly change behavior of "list" options (that is, config
27699 options that can appear more than once) when they appear both in
27700 torrc and on the command line. Previously, the command-line options
27701 would be appended to the ones from torrc. Now, the command-line
27702 options override the torrc options entirely. This new behavior
27703 allows the user to override list options (like exit policies and
27704 ports to listen on) from the command line, rather than simply
27705 appending to the list.
27706 - You can get the old (appending) command-line behavior for "list"
27707 options by prefixing the option name with a "+".
27708 - You can remove all the values for a "list" option from the command
27709 line without adding any new ones by prefixing the option name
27711 - Add experimental support for a "defaults" torrc file to be parsed
27712 before the regular torrc. Torrc options override the defaults file's
27713 options in the same way that the command line overrides the torrc.
27714 The SAVECONF controller command saves only those options which
27715 differ between the current configuration and the defaults file. HUP
27716 reloads both files. (Note: This is an experimental feature; its
27717 behavior will probably be refined in future 0.2.3.x-alpha versions
27718 to better meet packagers' needs.) Implements task 4552.
27721 - Try to make the introductory warning message that Tor prints on
27722 startup more useful for actually finding help and information.
27723 Resolves ticket 2474.
27724 - Running "make version" now displays the version of Tor that
27725 we're about to build. Idea from katmagic; resolves issue 4400.
27726 - Expire old or over-used hidden service introduction points.
27727 Required by fix for bug 3460.
27728 - Move the replay-detection cache for the RSA-encrypted parts of
27729 INTRODUCE2 cells to the introduction point data structures.
27730 Previously, we would use one replay-detection cache per hidden
27731 service. Required by fix for bug 3460.
27732 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
27733 public key replay-detection cache from 60 minutes to 5 minutes. This
27734 replay-detection cache is now used only to detect multiple
27735 INTRODUCE2 cells specifying the same rendezvous point, so we can
27736 avoid launching multiple simultaneous attempts to connect to it.
27738 o Minor bugfixes (on Tor 0.2.2.x and earlier):
27739 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27740 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27742 - Fix a minor formatting issue in one of tor-gencert's error messages.
27744 - Prevent a false positive from the check-spaces script, by disabling
27745 the "whitespace between function name and (" check for functions
27747 - Fix a log message suggesting that people contact a non-existent
27748 email address. Fixes bug 3448.
27749 - Fix null-pointer access that could occur if TLS allocation failed.
27750 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27751 - Report a real bootstrap problem to the controller on router
27752 identity mismatch. Previously we just said "foo", which probably
27753 made a lot of sense at the time. Fixes bug 4169; bugfix on
27755 - If we had ever tried to call tor_addr_to_str() on an address of
27756 unknown type, we would have done a strdup() on an uninitialized
27757 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27758 Reported by "troll_un".
27759 - Correctly detect and handle transient lookup failures from
27760 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27761 Reported by "troll_un".
27762 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27763 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27764 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
27765 bug 4532; found by "troll_un".
27767 o Minor bugfixes (on Tor 0.2.3.x):
27768 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
27770 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
27771 circuit for use as a hidden service client's rendezvous point.
27772 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
27773 with help from wanoskarnet.
27774 - Restore behavior of overriding SocksPort, ORPort, and similar
27775 options from the command line. Bugfix on 0.2.3.3-alpha.
27778 - Properly handle the case where the build-tree is not the same
27779 as the source tree when generating src/common/common_sha1.i,
27780 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
27781 bugfix on 0.2.0.1-alpha.
27783 o Code simplifications, cleanups, and refactorings:
27784 - Remove the pure attribute from all functions that used it
27785 previously. In many cases we assigned it incorrectly, because the
27786 functions might assert or call impure functions, and we don't have
27787 evidence that keeping the pure attribute is worthwhile. Implements
27788 changes suggested in ticket 4421.
27789 - Remove some dead code spotted by coverity. Fixes cid 432.
27790 Bugfix on 0.2.3.1-alpha, closes bug 4637.
27793 Changes in version 0.2.3.8-alpha - 2011-11-22
27794 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
27795 socketpair-related bug that has been bothering Windows users. It adds
27796 support to serve microdescriptors to controllers, so Vidalia's network
27797 map can resume listing relays (once Vidalia implements its side),
27798 and adds better support for hardware AES acceleration. Finally, it
27799 starts the process of adjusting the bandwidth cutoff for getting the
27800 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
27801 that tiny relays harm performance more than they help network capacity.
27804 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27805 that it doesn't attempt to allocate a socketpair. This could cause
27806 some problems on Windows systems with overzealous firewalls. Fix for
27807 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27809 - Correctly sanity-check that we don't underflow on a memory
27810 allocation (and then assert) for hidden service introduction
27811 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27812 bugfix on 0.2.1.5-alpha.
27813 - Remove the artificially low cutoff of 20KB to guarantee the Fast
27814 flag. In the past few years the average relay speed has picked
27815 up, and while the "top 7/8 of the network get the Fast flag" and
27816 "all relays with 20KB or more of capacity get the Fast flag" rules
27817 used to have the same result, now the top 7/8 of the network has
27818 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
27819 - Fix a rare assertion failure when checking whether a v0 hidden
27820 service descriptor has any usable introduction points left, and
27821 we don't have enough information to build a circuit to the first
27822 intro point named in the descriptor. The HS client code in
27823 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
27824 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
27825 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
27826 - Make bridge authorities not crash when they are asked for their own
27827 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
27828 - When running as a client, do not print a misleading (and plain
27829 wrong) log message that we're collecting "directory request"
27830 statistics: clients don't collect statistics. Also don't create a
27831 useless (because empty) stats file in the stats/ directory. Fixes
27832 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
27835 - Allow Tor controllers like Vidalia to obtain the microdescriptor
27836 for a relay by identity digest or nickname. Previously,
27837 microdescriptors were only available by their own digests, so a
27838 controller would have to ask for and parse the whole microdescriptor
27839 consensus in order to look up a single relay's microdesc. Fixes
27840 bug 3832; bugfix on 0.2.3.1-alpha.
27841 - Use OpenSSL's EVP interface for AES encryption, so that all AES
27842 operations can use hardware acceleration (if present). Resolves
27845 o Minor bugfixes (on 0.2.2.x and earlier):
27846 - Detect failure to initialize Libevent. This fix provides better
27847 detection for future instances of bug 4457.
27848 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27849 function. This was eating up hideously large amounts of time on some
27850 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27851 - Don't warn about unused log_mutex in log.c when building with
27852 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27853 0.1.0.6-rc which introduced --disable-threads.
27854 - Allow manual 'authenticate' commands to the controller interface
27855 from netcat (nc) as well as telnet. We were rejecting them because
27856 they didn't come with the expected whitespace at the end of the
27857 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
27858 - Fix some (not actually triggerable) buffer size checks in usage of
27859 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
27861 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
27862 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
27863 - When configuring, starting, or stopping an NT service, stop
27864 immediately after the service configuration attempt has succeeded
27865 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27866 - When sending a NETINFO cell, include the original address
27867 received for the other side, not its canonical address. Found
27868 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27869 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
27870 can pick them up when the tests aren't disabled. Bugfix on
27871 0.2.2.4-alpha which introduced tinytest.
27872 - Fix a memory leak when we check whether a hidden service
27873 descriptor has any usable introduction points left. Fixes bug
27874 4424. Bugfix on 0.2.2.25-alpha.
27875 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27876 occurred when a client tried to fetch a descriptor for a bridge
27877 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27879 o Minor bugfixes (on 0.2.3.x):
27880 - Make util unit tests build correctly with MSVC. Bugfix on
27881 0.2.3.3-alpha. Patch by Gisle Vanem.
27882 - Successfully detect AUTH_CHALLENGE cells with no recognized
27883 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
27884 Found by frosty_un.
27885 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
27886 it should still send a NETINFO cell to allow the connection to
27887 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
27889 - Log less loudly when we get an invalid authentication certificate
27890 from a source other than a directory authority: it's not unusual
27891 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
27893 - Tolerate servers with more clock skew in their authentication
27894 certificates than previously. Fixes bug 4371; bugfix on
27896 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
27897 on 0.2.3.4-alpha and 0.2.3.6-alpha.
27900 - Add two new config options for directory authorities:
27901 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27902 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27903 that is always sufficient to satisfy the bandwidth requirement for
27904 the Guard flag. Now it will be easier for researchers to simulate
27905 Tor networks with different values. Resolves ticket 4484.
27906 - When Tor ignores a hidden service specified in its configuration,
27907 include the hidden service's directory in the warning message.
27908 Previously, we would only tell the user that some hidden service
27909 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27910 - When we fail to initialize Libevent, retry with IOCP disabled so we
27911 don't need to turn on multi-threading support in Libevent, which in
27912 turn requires a working socketpair(). This is a workaround for bug
27913 4457, which affects Libevent versions from 2.0.1-alpha through
27915 - Detect when we try to build on a platform that doesn't define
27916 AF_UNSPEC to 0. We don't work there, so refuse to compile.
27917 - Update to the November 1 2011 Maxmind GeoLite Country database.
27919 o Packaging changes:
27920 - Make it easier to automate expert package builds on Windows,
27921 by removing an absolute path from makensis.exe command.
27923 o Code simplifications and refactoring:
27924 - Remove some redundant #include directives throughout the code.
27925 Patch from Andrea Gelmini.
27926 - Unconditionally use OpenSSL's AES implementation instead of our
27927 old built-in one. OpenSSL's AES has been better for a while, and
27928 relatively few servers should still be on any version of OpenSSL
27929 that doesn't have good optimized assembly AES.
27930 - Use the name "CERTS" consistently to refer to the new cell type;
27931 we were calling it CERT in some places and CERTS in others.
27934 - Numerous new unit tests for functions in util.c and address.c by
27936 - The long-disabled benchmark tests are now split into their own
27937 ./src/test/bench binary.
27938 - The benchmark tests can now use more accurate timers than
27939 gettimeofday() when such timers are available.
27942 Changes in version 0.2.3.7-alpha - 2011-10-30
27943 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
27944 the new v3 handshake. It also resolves yet another bridge address
27948 - If we mark an OR connection for close based on a cell we process,
27949 don't process any further cells on it. We already avoid further
27950 reads on marked-for-close connections, but now we also discard the
27951 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27952 which was the first version where we might mark a connection for
27953 close based on processing a cell on it.
27954 - Fix a double-free bug that would occur when we received an invalid
27955 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
27956 bugfix on 0.2.3.6-alpha.
27957 - Bridges no longer include their address in NETINFO cells on outgoing
27958 OR connections, to allow them to blend in better with clients.
27959 Removes another avenue for enumerating bridges. Reported by
27960 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
27961 cells were introduced.
27964 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
27965 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27968 Changes in version 0.2.3.6-alpha - 2011-10-26
27969 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
27970 anonymity vulnerability where an attacker can deanonymize Tor
27971 users. Everybody should upgrade.
27973 This release also features support for a new v3 connection handshake
27974 protocol, and fixes to make hidden service connections more robust.
27977 - Implement a new handshake protocol (v3) for authenticating Tors to
27978 each other over TLS. It should be more resistant to fingerprinting
27979 than previous protocols, and should require less TLS hacking for
27980 future Tor implementations. Implements proposal 176.
27981 - Allow variable-length padding cells to disguise the length of
27982 Tor's TLS records. Implements part of proposal 184.
27984 o Privacy/anonymity fixes (clients):
27985 - Clients and bridges no longer send TLS certificate chains on
27986 outgoing OR connections. Previously, each client or bridge would
27987 use the same cert chain for all outgoing OR connections until
27988 its IP address changes, which allowed any relay that the client
27989 or bridge contacted to determine which entry guards it is using.
27990 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27991 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27992 no longer considers that connection as suitable for satisfying a
27993 circuit EXTEND request. Now relays can protect clients from the
27994 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27995 - Directory authorities no longer assign the Guard flag to relays
27996 that haven't upgraded to the above "refuse EXTEND requests
27997 to client connections" fix. Now directory authorities can
27998 protect clients from the CVE-2011-2768 issue even if neither
27999 the clients nor the relays have upgraded yet. There's a new
28000 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
28001 to let us transition smoothly, else tomorrow there would be no
28004 o Major bugfixes (hidden services):
28005 - Improve hidden service robustness: when an attempt to connect to
28006 a hidden service ends, be willing to refetch its hidden service
28007 descriptors from each of the HSDir relays responsible for them
28008 immediately. Previously, we would not consider refetching the
28009 service's descriptors from each HSDir for 15 minutes after the last
28010 fetch, which was inconvenient if the hidden service was not running
28011 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
28012 - When one of a hidden service's introduction points appears to be
28013 unreachable, stop trying it. Previously, we would keep trying
28014 to build circuits to the introduction point until we lost the
28015 descriptor, usually because the user gave up and restarted Tor.
28016 Partly fixes bug 3825.
28017 - Don't launch a useless circuit after failing to use one of a
28018 hidden service's introduction points. Previously, we would
28019 launch a new introduction circuit, but not set the hidden service
28020 which that circuit was intended to connect to, so it would never
28021 actually be used. A different piece of code would then create a
28022 new introduction circuit correctly. Bug reported by katmagic and
28023 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
28025 o Major bugfixes (other):
28026 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
28027 that they initiated. Relays could distinguish incoming bridge
28028 connections from client connections, creating another avenue for
28029 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
28030 Found by "frosty_un".
28031 - Don't update the AccountingSoftLimitHitAt state file entry whenever
28032 tor gets started. This prevents a wrong average bandwidth
28033 estimate, which would cause relays to always start a new accounting
28034 interval at the earliest possible moment. Fixes bug 2003; bugfix
28035 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
28036 immensely in tracking this bug down.
28037 - Fix a crash bug when changing node restrictions while a DNS lookup
28038 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
28041 o Minor bugfixes (on 0.2.2.x and earlier):
28042 - When a hidden service turns an extra service-side introduction
28043 circuit into a general-purpose circuit, free the rend_data and
28044 intro_key fields first, so we won't leak memory if the circuit
28045 is cannibalized for use as another service-side introduction
28046 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
28047 - Rephrase the log message emitted if the TestSocks check is
28048 successful. Patch from Fabian Keil; fixes bug 4094.
28049 - Bridges now skip DNS self-tests, to act a little more stealthily.
28050 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
28051 bridges. Patch by "warms0x".
28052 - Remove a confusing dollar sign from the example fingerprint in the
28053 man page, and also make the example fingerprint a valid one. Fixes
28054 bug 4309; bugfix on 0.2.1.3-alpha.
28055 - Fix internal bug-checking logic that was supposed to catch
28056 failures in digest generation so that it will fail more robustly
28057 if we ask for a nonexistent algorithm. Found by Coverity Scan.
28058 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
28059 - Report any failure in init_keys() calls launched because our
28060 IP address has changed. Spotted by Coverity Scan. Bugfix on
28061 0.1.1.4-alpha; fixes CID 484.
28063 o Minor bugfixes (on 0.2.3.x):
28064 - Fix a bug in configure.in that kept it from building a configure
28065 script with autoconf versions earlier than 2.61. Fixes bug 2430;
28066 bugfix on 0.2.3.1-alpha.
28067 - Don't warn users that they are exposing a client port to the
28068 Internet if they have specified an RFC1918 address. Previously,
28069 we would warn if the user had specified any non-loopback
28070 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
28071 - Fix memory leaks in the failing cases of the new SocksPort and
28072 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
28073 fixes coverity CIDs 485, 486, and 487.
28076 - When a hidden service's introduction point times out, consider
28077 trying it again during the next attempt to connect to the
28078 HS. Previously, we would not try it again unless a newly fetched
28079 descriptor contained it. Required by fixes for bugs 1297 and 3825.
28080 - The next version of Windows will be called Windows 8, and it has
28081 a major version of 6, minor version of 2. Correctly identify that
28082 version instead of calling it "Very recent version". Resolves
28083 ticket 4153; reported by funkstar.
28084 - The Bridge Authority now writes statistics on how many bridge
28085 descriptors it gave out in total, and how many unique descriptors
28086 it gave out. It also lists how often the most and least commonly
28087 fetched descriptors were given out, as well as the median and
28088 25th/75th percentile. Implements tickets 4200 and 4294.
28089 - Update to the October 4 2011 Maxmind GeoLite Country database.
28091 o Code simplifications and refactoring:
28092 - Remove some old code to remember statistics about which descriptors
28093 we've served as a directory mirror. The feature wasn't used and
28094 is outdated now that microdescriptors are around.
28095 - Rename Tor functions that turn strings into addresses, so that
28096 "parse" indicates that no hostname resolution occurs, and
28097 "lookup" indicates that hostname resolution may occur. This
28098 should help prevent mistakes in the future. Fixes bug 3512.
28101 Changes in version 0.2.2.34 - 2011-10-26
28102 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
28103 can deanonymize Tor users. Everybody should upgrade.
28105 The attack relies on four components: 1) Clients reuse their TLS cert
28106 when talking to different relays, so relays can recognize a user by
28107 the identity key in her cert. 2) An attacker who knows the client's
28108 identity key can probe each guard relay to see if that identity key
28109 is connected to that guard relay right now. 3) A variety of active
28110 attacks in the literature (starting from "Low-Cost Traffic Analysis
28111 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
28112 discover the guard relays that a Tor user visiting the website is using.
28113 4) Clients typically pick three guards at random, so the set of guards
28114 for a given user could well be a unique fingerprint for her. This
28115 release fixes components #1 and #2, which is enough to block the attack;
28116 the other two remain as open research problems. Special thanks to
28117 "frosty_un" for reporting the issue to us!
28119 Clients should upgrade so they are no longer recognizable by the TLS
28120 certs they present. Relays should upgrade so they no longer allow a
28121 remote attacker to probe them to test whether unpatched clients are
28122 currently connected to them.
28124 This release also fixes several vulnerabilities that allow an attacker
28125 to enumerate bridge relays. Some bridge enumeration attacks still
28126 remain; see for example proposal 188.
28128 o Privacy/anonymity fixes (clients):
28129 - Clients and bridges no longer send TLS certificate chains on
28130 outgoing OR connections. Previously, each client or bridge would
28131 use the same cert chain for all outgoing OR connections until
28132 its IP address changes, which allowed any relay that the client
28133 or bridge contacted to determine which entry guards it is using.
28134 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
28135 - If a relay receives a CREATE_FAST cell on a TLS connection, it
28136 no longer considers that connection as suitable for satisfying a
28137 circuit EXTEND request. Now relays can protect clients from the
28138 CVE-2011-2768 issue even if the clients haven't upgraded yet.
28139 - Directory authorities no longer assign the Guard flag to relays
28140 that haven't upgraded to the above "refuse EXTEND requests
28141 to client connections" fix. Now directory authorities can
28142 protect clients from the CVE-2011-2768 issue even if neither
28143 the clients nor the relays have upgraded yet. There's a new
28144 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
28145 to let us transition smoothly, else tomorrow there would be no
28148 o Privacy/anonymity fixes (bridge enumeration):
28149 - Bridge relays now do their directory fetches inside Tor TLS
28150 connections, like all the other clients do, rather than connecting
28151 directly to the DirPort like public relays do. Removes another
28152 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
28153 - Bridges relays now build circuits for themselves in a more similar
28154 way to how clients build them. Removes another avenue for
28155 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
28156 when bridges were introduced.
28157 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
28158 that they initiated. Relays could distinguish incoming bridge
28159 connections from client connections, creating another avenue for
28160 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
28161 Found by "frosty_un".
28164 - Fix a crash bug when changing node restrictions while a DNS lookup
28165 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
28167 - Don't launch a useless circuit after failing to use one of a
28168 hidden service's introduction points. Previously, we would
28169 launch a new introduction circuit, but not set the hidden service
28170 which that circuit was intended to connect to, so it would never
28171 actually be used. A different piece of code would then create a
28172 new introduction circuit correctly. Bug reported by katmagic and
28173 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
28176 - Change an integer overflow check in the OpenBSD_Malloc code so
28177 that GCC is less likely to eliminate it as impossible. Patch
28178 from Mansour Moufid. Fixes bug 4059.
28179 - When a hidden service turns an extra service-side introduction
28180 circuit into a general-purpose circuit, free the rend_data and
28181 intro_key fields first, so we won't leak memory if the circuit
28182 is cannibalized for use as another service-side introduction
28183 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
28184 - Bridges now skip DNS self-tests, to act a little more stealthily.
28185 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
28186 bridges. Patch by "warms0x".
28187 - Fix internal bug-checking logic that was supposed to catch
28188 failures in digest generation so that it will fail more robustly
28189 if we ask for a nonexistent algorithm. Found by Coverity Scan.
28190 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
28191 - Report any failure in init_keys() calls launched because our
28192 IP address has changed. Spotted by Coverity Scan. Bugfix on
28193 0.1.1.4-alpha; fixes CID 484.
28195 o Minor bugfixes (log messages and documentation):
28196 - Remove a confusing dollar sign from the example fingerprint in the
28197 man page, and also make the example fingerprint a valid one. Fixes
28198 bug 4309; bugfix on 0.2.1.3-alpha.
28199 - The next version of Windows will be called Windows 8, and it has
28200 a major version of 6, minor version of 2. Correctly identify that
28201 version instead of calling it "Very recent version". Resolves
28202 ticket 4153; reported by funkstar.
28203 - Downgrade log messages about circuit timeout calibration from
28204 "notice" to "info": they don't require or suggest any human
28205 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
28206 bugfix on 0.2.2.14-alpha.
28209 - Turn on directory request statistics by default and include them in
28210 extra-info descriptors. Don't break if we have no GeoIP database.
28211 Backported from 0.2.3.1-alpha; implements ticket 3951.
28212 - Update to the October 4 2011 Maxmind GeoLite Country database.
28215 Changes in version 0.2.1.31 - 2011-10-26
28216 Tor 0.2.1.31 backports important security and privacy fixes for
28217 oldstable. This release is intended only for package maintainers and
28218 others who cannot use the 0.2.2 stable series. All others should be
28219 using Tor 0.2.2.x or newer.
28221 o Security fixes (also included in 0.2.2.x):
28222 - Replace all potentially sensitive memory comparison operations
28223 with versions whose runtime does not depend on the data being
28224 compared. This will help resist a class of attacks where an
28225 adversary can use variations in timing information to learn
28226 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28227 implementation by Robert Ransom based partially on code by DJB.)
28228 - Fix an assert in parsing router descriptors containing IPv6
28229 addresses. This one took down the directory authorities when
28230 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
28232 o Privacy/anonymity fixes (also included in 0.2.2.x):
28233 - Clients and bridges no longer send TLS certificate chains on
28234 outgoing OR connections. Previously, each client or bridge would
28235 use the same cert chain for all outgoing OR connections until
28236 its IP address changes, which allowed any relay that the client
28237 or bridge contacted to determine which entry guards it is using.
28238 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
28239 - If a relay receives a CREATE_FAST cell on a TLS connection, it
28240 no longer considers that connection as suitable for satisfying a
28241 circuit EXTEND request. Now relays can protect clients from the
28242 CVE-2011-2768 issue even if the clients haven't upgraded yet.
28243 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
28244 that they initiated. Relays could distinguish incoming bridge
28245 connections from client connections, creating another avenue for
28246 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
28247 Found by "frosty_un".
28248 - When receiving a hidden service descriptor, check that it is for
28249 the hidden service we wanted. Previously, Tor would store any
28250 hidden service descriptors that a directory gave it, whether it
28251 wanted them or not. This wouldn't have let an attacker impersonate
28252 a hidden service, but it did let directories pre-seed a client
28253 with descriptors that it didn't want. Bugfix on 0.0.6.
28254 - Avoid linkability based on cached hidden service descriptors: forget
28255 all hidden service descriptors cached as a client when processing a
28256 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28257 - Make the bridge directory authority refuse to answer directory
28258 requests for "all" descriptors. It used to include bridge
28259 descriptors in its answer, which was a major information leak.
28260 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
28261 - Don't attach new streams to old rendezvous circuits after SIGNAL
28262 NEWNYM. Previously, we would keep using an existing rendezvous
28263 circuit if it remained open (i.e. if it were kept open by a
28264 long-lived stream, or if a new stream were attached to it before
28265 Tor could notice that it was old and no longer in use). Bugfix on
28266 0.1.1.15-rc; fixes bug 3375.
28268 o Minor bugfixes (also included in 0.2.2.x):
28269 - When we restart our relay, we might get a successful connection
28270 from the outside before we've started our reachability tests,
28271 triggering a warning: "ORPort found reachable, but I have no
28272 routerinfo yet. Failing to inform controller of success." This
28273 bug was harmless unless Tor is running under a controller
28274 like Vidalia, in which case the controller would never get a
28275 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
28277 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
28278 enabled. Fixes bug 1526.
28279 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28280 anything since 0.2.1.16-rc.
28281 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
28282 None of the cases where we did this before were wrong, but by making
28283 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
28284 - Fix a rare crash bug that could occur when a client was configured
28285 with a large number of bridges. Fixes bug 2629; bugfix on
28286 0.2.1.2-alpha. Bugfix by trac user "shitlei".
28287 - Correct the warning displayed when a rendezvous descriptor exceeds
28288 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
28290 - Fix an uncommon assertion failure when running with DNSPort under
28291 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28292 - When warning about missing zlib development packages during compile,
28293 give the correct package names. Bugfix on 0.2.0.1-alpha.
28294 - Require that introduction point keys and onion keys have public
28295 exponent 65537. Bugfix on 0.2.0.10-alpha.
28296 - Do not crash when our configuration file becomes unreadable, for
28297 example due to a permissions change, between when we start up
28298 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28300 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28302 - Always NUL-terminate the sun_path field of a sockaddr_un before
28303 passing it to the kernel. (Not a security issue: kernels are
28304 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28305 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28306 - Don't stack-allocate the list of supplementary GIDs when we're
28307 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28308 could take up to 256K, which is way too much stack. Found by
28309 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28311 o Minor bugfixes (only in 0.2.1.x):
28312 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
28313 rely on them. Bugfix on 0.2.1.30.
28314 - Use git revisions instead of svn revisions when generating our
28315 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
28317 o Minor features (also included in 0.2.2.x):
28318 - Adjust the expiration time on our SSL session certificates to
28319 better match SSL certs seen in the wild. Resolves ticket 4014.
28320 - Allow nameservers with IPv6 address. Resolves bug 2574.
28321 - Update to the October 4 2011 Maxmind GeoLite Country database.
28324 Changes in version 0.2.3.5-alpha - 2011-09-28
28325 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
28326 bridge relays; fixes an assertion error that many users started hitting
28327 today; and adds the ability to refill token buckets more often than
28328 once per second, allowing significant performance improvements.
28331 - Bridge relays now do their directory fetches inside Tor TLS
28332 connections, like all the other clients do, rather than connecting
28333 directly to the DirPort like public relays do. Removes another
28334 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
28335 - Bridges relays now build circuits for themselves in a more similar
28336 way to how clients build them. Removes another avenue for
28337 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
28338 when bridges were introduced.
28341 - Fix an "Assertion md->held_by_node == 1 failed" error that could
28342 occur when the same microdescriptor was referenced by two node_t
28343 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
28345 o Major features (networking):
28346 - Add a new TokenBucketRefillInterval option to refill token buckets
28347 more frequently than once per second. This should improve network
28348 performance, alleviate queueing problems, and make traffic less
28349 bursty. Implements proposal 183; closes ticket 3630. Design by
28350 Florian Tschorsch and Björn Scheuermann; implementation by
28354 - Change an integer overflow check in the OpenBSD_Malloc code so
28355 that GCC is less likely to eliminate it as impossible. Patch
28356 from Mansour Moufid. Fixes bug 4059.
28358 o Minor bugfixes (usability):
28359 - Downgrade log messages about circuit timeout calibration from
28360 "notice" to "info": they don't require or suggest any human
28361 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
28362 bugfix on 0.2.2.14-alpha.
28364 o Minor features (diagnostics):
28365 - When the system call to create a listener socket fails, log the
28366 error message explaining why. This may help diagnose bug 4027.
28369 Changes in version 0.2.3.4-alpha - 2011-09-13
28370 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
28371 tweak to Tor's TLS handshake that makes relays and bridges that run
28372 this new version reachable from Iran again. It also fixes a few new
28373 bugs in 0.2.3.x, and teaches relays to recognize when they're not
28374 listed in the network consensus and republish.
28376 o Major bugfixes (also part of 0.2.2.33):
28377 - Avoid an assertion failure when reloading a configuration with
28378 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
28379 3923; bugfix on 0.2.2.25-alpha.
28381 o Minor features (security, also part of 0.2.2.33):
28382 - Check for replays of the public-key encrypted portion of an
28383 INTRODUCE1 cell, in addition to the current check for replays of
28384 the g^x value. This prevents a possible class of active attacks
28385 by an attacker who controls both an introduction point and a
28386 rendezvous point, and who uses the malleability of AES-CTR to
28387 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
28388 that these attacks are infeasible (requiring the attacker to send
28389 on the order of zettabytes of altered cells in a short interval),
28390 but we'd rather block them off in case there are any classes of
28391 this attack that we missed. Reported by Willem Pinckaers.
28393 o Minor features (also part of 0.2.2.33):
28394 - Adjust the expiration time on our SSL session certificates to
28395 better match SSL certs seen in the wild. Resolves ticket 4014.
28396 - Change the default required uptime for a relay to be accepted as
28397 a HSDir (hidden service directory) from 24 hours to 25 hours.
28398 Improves on 0.2.0.10-alpha; resolves ticket 2649.
28399 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
28400 authorities to abstain from voting on assignment of the HSDir
28401 consensus flag. Related to bug 2649.
28402 - Update to the September 6 2011 Maxmind GeoLite Country database.
28404 o Minor bugfixes (also part of 0.2.2.33):
28405 - Demote the 'replay detected' log message emitted when a hidden
28406 service receives the same Diffie-Hellman public key in two different
28407 INTRODUCE2 cells to info level. A normal Tor client can cause that
28408 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
28409 fixes part of bug 2442.
28410 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
28411 level. There is nothing that a hidden service's operator can do
28412 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
28414 - Clarify a log message specifying the characters permitted in
28415 HiddenServiceAuthorizeClient client names. Previously, the log
28416 message said that "[A-Za-z0-9+-_]" were permitted; that could have
28417 given the impression that every ASCII character between "+" and "_"
28418 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
28420 o Build fixes (also part of 0.2.2.33):
28421 - Clean up some code issues that prevented Tor from building on older
28422 BSDs. Fixes bug 3894; reported by "grarpamp".
28423 - Search for a platform-specific version of "ar" when cross-compiling.
28424 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
28427 - Fix a bug where the SocksPort option (for example) would get
28428 ignored and replaced by the default if a SocksListenAddress
28429 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
28433 - Relays now try regenerating and uploading their descriptor more
28434 frequently if they are not listed in the consensus, or if the
28435 version of their descriptor listed in the consensus is too
28436 old. This fix should prevent situations where a server declines
28437 to re-publish itself because it has done so too recently, even
28438 though the authorities decided not to list its recent-enough
28439 descriptor. Fix for bug 3327.
28442 - Relays now include a reason for regenerating their descriptors
28443 in an HTTP header when uploading to the authorities. This will
28444 make it easier to debug descriptor-upload issues in the future.
28445 - When starting as root and then changing our UID via the User
28446 control option, and we have a ControlSocket configured, make sure
28447 that the ControlSocket is owned by the same account that Tor will
28448 run under. Implements ticket 3421; fix by Jérémy Bobbio.
28451 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
28452 utility function used in the control-port code). This shouldn't
28453 ever happen unless Tor is completely out of memory, but if it did
28454 happen and Tor somehow recovered from it, Tor could have sent a log
28455 message to a control port in the middle of a reply to a controller
28456 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
28457 - Make 'FetchUselessDescriptors' cause all descriptor types and
28458 all consensus types (including microdescriptors) to get fetched.
28459 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
28461 o Code refactoring:
28462 - Make a new "entry connection" struct as an internal subtype of "edge
28463 connection", to simplify the code and make exit connections smaller.
28466 Changes in version 0.2.2.33 - 2011-09-13
28467 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
28468 TLS handshake that makes relays and bridges that run this new version
28469 reachable from Iran again.
28472 - Avoid an assertion failure when reloading a configuration with
28473 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
28474 3923; bugfix on 0.2.2.25-alpha.
28476 o Minor features (security):
28477 - Check for replays of the public-key encrypted portion of an
28478 INTRODUCE1 cell, in addition to the current check for replays of
28479 the g^x value. This prevents a possible class of active attacks
28480 by an attacker who controls both an introduction point and a
28481 rendezvous point, and who uses the malleability of AES-CTR to
28482 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
28483 that these attacks are infeasible (requiring the attacker to send
28484 on the order of zettabytes of altered cells in a short interval),
28485 but we'd rather block them off in case there are any classes of
28486 this attack that we missed. Reported by Willem Pinckaers.
28489 - Adjust the expiration time on our SSL session certificates to
28490 better match SSL certs seen in the wild. Resolves ticket 4014.
28491 - Change the default required uptime for a relay to be accepted as
28492 a HSDir (hidden service directory) from 24 hours to 25 hours.
28493 Improves on 0.2.0.10-alpha; resolves ticket 2649.
28494 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
28495 authorities to abstain from voting on assignment of the HSDir
28496 consensus flag. Related to bug 2649.
28497 - Update to the September 6 2011 Maxmind GeoLite Country database.
28499 o Minor bugfixes (documentation and log messages):
28500 - Correct the man page to explain that HashedControlPassword and
28501 CookieAuthentication can both be set, in which case either method
28502 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28503 when we decided to allow these config options to both be set. Issue
28504 raised by bug 3898.
28505 - Demote the 'replay detected' log message emitted when a hidden
28506 service receives the same Diffie-Hellman public key in two different
28507 INTRODUCE2 cells to info level. A normal Tor client can cause that
28508 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
28509 fixes part of bug 2442.
28510 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
28511 level. There is nothing that a hidden service's operator can do
28512 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
28514 - Clarify a log message specifying the characters permitted in
28515 HiddenServiceAuthorizeClient client names. Previously, the log
28516 message said that "[A-Za-z0-9+-_]" were permitted; that could have
28517 given the impression that every ASCII character between "+" and "_"
28518 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
28521 - Provide a substitute implementation of lround() for MSVC, which
28522 apparently lacks it. Patch from Gisle Vanem.
28523 - Clean up some code issues that prevented Tor from building on older
28524 BSDs. Fixes bug 3894; reported by "grarpamp".
28525 - Search for a platform-specific version of "ar" when cross-compiling.
28526 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
28529 Changes in version 0.2.3.3-alpha - 2011-09-01
28530 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
28531 security, and provides client-side support for the microdescriptor
28532 and optimistic data features introduced earlier in the 0.2.3.x
28533 series. It also includes numerous critical bugfixes in the (optional)
28534 bufferevent-based networking backend.
28536 o Major features (stream isolation):
28537 - You can now configure Tor so that streams from different
28538 applications are isolated on different circuits, to prevent an
28539 attacker who sees your streams as they leave an exit node from
28540 linking your sessions to one another. To do this, choose some way
28541 to distinguish the applications: have them connect to different
28542 SocksPorts, or have one of them use SOCKS4 while the other uses
28543 SOCKS5, or have them pass different authentication strings to the
28544 SOCKS proxy. Then, use the new SocksPort syntax to configure the
28545 degree of isolation you need. This implements Proposal 171.
28546 - There's a new syntax for specifying multiple client ports (such as
28547 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
28548 multiple *Port entries with full addr:port syntax on each.
28549 The old *ListenAddress format is still supported, but you can't
28550 mix it with the new *Port syntax.
28552 o Major features (other):
28553 - Enable microdescriptor fetching by default for clients. This allows
28554 clients to download a much smaller amount of directory information.
28555 To disable it (and go back to the old-style consensus and
28556 descriptors), set "UseMicrodescriptors 0" in your torrc file.
28557 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
28558 "PortForwarding" config option), now supports Windows.
28559 - When using an exit relay running 0.2.3.x, clients can now
28560 "optimistically" send data before the exit relay reports that
28561 the stream has opened. This saves a round trip when starting
28562 connections where the client speaks first (such as web browsing).
28563 This behavior is controlled by a consensus parameter (currently
28564 disabled). To turn it on or off manually, use the "OptimisticData"
28565 torrc option. Implements proposal 181; code by Ian Goldberg.
28567 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
28568 - When using IOCP on Windows, we need to enable Libevent windows
28570 - The IOCP backend now works even when the user has not specified
28571 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
28572 Fixes part of bug 3752.
28573 - Correctly record the bytes we've read and written when using
28574 bufferevents, so that we can include them in our bandwidth history
28575 and advertised bandwidth. Fixes bug 3803.
28576 - Apply rate-limiting only at the bottom of a chain of filtering
28577 bufferevents. This prevents us from filling up internal read
28578 buffers and violating rate-limits when filtering bufferevents
28579 are enabled. Fixes part of bug 3804.
28580 - Add high-watermarks to the output buffers for filtered
28581 bufferevents. This prevents us from filling up internal write
28582 buffers and wasting CPU cycles when filtering bufferevents are
28583 enabled. Fixes part of bug 3804.
28584 - Correctly notice when data has been written from a bufferevent
28585 without flushing it completely. Fixes bug 3805.
28586 - Fix a bug where server-side tunneled bufferevent-based directory
28587 streams would get closed prematurely. Fixes bug 3814.
28588 - Fix a use-after-free error with per-connection rate-limiting
28589 buckets. Fixes bug 3888.
28591 o Major bugfixes (also part of 0.2.2.31-rc):
28592 - If we're configured to write our ControlPorts to disk, only write
28593 them after switching UID and creating the data directory. This way,
28594 we don't fail when starting up with a nonexistent DataDirectory
28595 and a ControlPortWriteToFile setting based on that directory. Fixes
28596 bug 3747; bugfix on Tor 0.2.2.26-beta.
28599 - Added a new CONF_CHANGED event so that controllers can be notified
28600 of any configuration changes made by other controllers, or by the
28601 user. Implements ticket 1692.
28602 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
28603 leak when using bufferevents, and lets Libevent worry about how to
28604 best copy data out of a buffer.
28605 - Replace files in stats/ rather than appending to them. Now that we
28606 include statistics in extra-info descriptors, it makes no sense to
28607 keep old statistics forever. Implements ticket 2930.
28609 o Minor features (build compatibility):
28610 - Limited, experimental support for building with nmake and MSVC.
28611 - Provide a substitute implementation of lround() for MSVC, which
28612 apparently lacks it. Patch from Gisle Vanem.
28614 o Minor features (also part of 0.2.2.31-rc):
28615 - Update to the August 2 2011 Maxmind GeoLite Country database.
28617 o Minor bugfixes (on 0.2.3.x-alpha):
28618 - Fix a spurious warning when parsing SOCKS requests with
28619 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
28620 - Get rid of a harmless warning that could happen on relays running
28621 with bufferevents. The warning was caused by someone doing an http
28622 request to a relay's orport. Also don't warn for a few related
28623 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
28625 o Minor bugfixes (on 2.2.x and earlier):
28626 - Correct the man page to explain that HashedControlPassword and
28627 CookieAuthentication can both be set, in which case either method
28628 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28629 when we decided to allow these config options to both be set. Issue
28630 raised by bug 3898.
28631 - The "--quiet" and "--hush" options now apply not only to Tor's
28632 behavior before logs are configured, but also to Tor's behavior in
28633 the absence of configured logs. Fixes bug 3550; bugfix on
28636 o Minor bugfixes (also part of 0.2.2.31-rc):
28637 - Write several files in text mode, on OSes that distinguish text
28638 mode from binary mode (namely, Windows). These files are:
28639 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28640 that collect those statistics; 'client_keys' and 'hostname' for
28641 hidden services that use authentication; and (in the tor-gencert
28642 utility) newly generated identity and signing keys. Previously,
28643 we wouldn't specify text mode or binary mode, leading to an
28644 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28645 the DirRecordUsageByCountry option which would have triggered
28646 the assertion failure was added), although this assertion failure
28647 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28648 - Selectively disable deprecation warnings on OS X because Lion
28649 started deprecating the shipped copy of openssl. Fixes bug 3643.
28650 - Remove an extra pair of quotation marks around the error
28651 message in control-port STATUS_GENERAL BUG events. Bugfix on
28652 0.1.2.6-alpha; fixes bug 3732.
28653 - When unable to format an address as a string, report its value
28654 as "???" rather than reusing the last formatted address. Bugfix
28657 o Code simplifications and refactoring:
28658 - Rewrite the listener-selection logic so that parsing which ports
28659 we want to listen on is now separate from binding to the ports
28663 - Building Tor with bufferevent support now requires Libevent
28664 2.0.13-stable or later. Previous versions of Libevent had bugs in
28665 SSL-related bufferevents and related issues that would make Tor
28666 work badly with bufferevents. Requiring 2.0.13-stable also allows
28667 Tor with bufferevents to take advantage of Libevent APIs
28668 introduced after 2.0.8-rc.
28671 Changes in version 0.2.2.32 - 2011-08-27
28672 The Tor 0.2.2 release series is dedicated to the memory of Andreas
28673 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
28674 a founder of the PETS community, a leader in our field, a mentor,
28675 and a friend. He left us with these words: "I had the possibility
28676 to contribute to this world that is not as it should be. I hope I
28677 could help in some areas to make the world a better place, and that
28678 I could also encourage other people to be engaged in improving the
28679 world. Please, stay engaged. This world needs you, your love, your
28680 initiative -- now I cannot be part of that anymore."
28682 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
28683 ready. More than two years in the making, this release features improved
28684 client performance and hidden service reliability, better compatibility
28685 for Android, correct behavior for bridges that listen on more than
28686 one address, more extensible and flexible directory object handling,
28687 better reporting of network statistics, improved code security, and
28688 many many other features and bugfixes.
28691 Changes in version 0.2.2.31-rc - 2011-08-17
28692 Tor 0.2.2.31-rc is the second and hopefully final release candidate
28693 for the Tor 0.2.2.x series.
28696 - Remove an extra pair of quotation marks around the error
28697 message in control-port STATUS_GENERAL BUG events. Bugfix on
28698 0.1.2.6-alpha; fixes bug 3732.
28699 - If we're configured to write our ControlPorts to disk, only write
28700 them after switching UID and creating the data directory. This way,
28701 we don't fail when starting up with a nonexistent DataDirectory
28702 and a ControlPortWriteToFile setting based on that directory. Fixes
28703 bug 3747; bugfix on Tor 0.2.2.26-beta.
28706 - Update to the August 2 2011 Maxmind GeoLite Country database.
28709 - Allow GETINFO fingerprint to return a fingerprint even when
28710 we have not yet built a router descriptor. Fixes bug 3577;
28711 bugfix on 0.2.0.1-alpha.
28712 - Write several files in text mode, on OSes that distinguish text
28713 mode from binary mode (namely, Windows). These files are:
28714 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28715 that collect those statistics; 'client_keys' and 'hostname' for
28716 hidden services that use authentication; and (in the tor-gencert
28717 utility) newly generated identity and signing keys. Previously,
28718 we wouldn't specify text mode or binary mode, leading to an
28719 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28720 the DirRecordUsageByCountry option which would have triggered
28721 the assertion failure was added), although this assertion failure
28722 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28723 - Selectively disable deprecation warnings on OS X because Lion
28724 started deprecating the shipped copy of openssl. Fixes bug 3643.
28725 - When unable to format an address as a string, report its value
28726 as "???" rather than reusing the last formatted address. Bugfix
28730 Changes in version 0.2.3.2-alpha - 2011-07-18
28731 Tor 0.2.3.2-alpha introduces two new experimental features:
28732 microdescriptors and pluggable transports. It also continues cleaning
28733 up a variety of recently introduced features.
28736 - Clients can now use microdescriptors instead of regular descriptors
28737 to build circuits. Microdescriptors are authority-generated
28738 summaries of regular descriptors' contents, designed to change
28739 very rarely (see proposal 158 for details). This feature is
28740 designed to save bandwidth, especially for clients on slow internet
28741 connections. It's off by default for now, since nearly no caches
28742 support it, but it will be on-by-default for clients in a future
28743 version. You can use the UseMicrodescriptors option to turn it on.
28744 - Tor clients using bridges can now be configured to use a separate
28745 'transport' proxy for each bridge. This approach helps to resist
28746 censorship by allowing bridges to use protocol obfuscation
28747 plugins. It implements part of proposal 180. Implements ticket 2841.
28748 - While we're trying to bootstrap, record how many TLS connections
28749 fail in each state, and report which states saw the most failures
28750 in response to any bootstrap failures. This feature may speed up
28751 diagnosis of censorship events. Implements ticket 3116.
28753 o Major bugfixes (on 0.2.3.1-alpha):
28754 - When configuring a large set of nodes in EntryNodes (as with
28755 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
28756 random subset to be guards, and choose them in random
28757 order. Fixes bug 2798.
28758 - Tor could crash when remembering a consensus in a non-used consensus
28759 flavor without having a current consensus set. Fixes bug 3361.
28760 - Comparing an unknown address to a microdescriptor's shortened exit
28761 policy would always give a "rejected" result. Fixes bug 3599.
28762 - Using microdescriptors as a client no longer prevents Tor from
28763 uploading and downloading hidden service descriptors. Fixes
28767 - Allow nameservers with IPv6 address. Resolves bug 2574.
28768 - Accept attempts to include a password authenticator in the
28769 handshake, as supported by SOCKS5. This handles SOCKS clients that
28770 don't know how to omit a password when authenticating. Resolves
28772 - When configuring a large set of nodes in EntryNodes, and there are
28773 enough of them listed as Guard so that we don't need to consider
28774 the non-guard entries, prefer the ones listed with the Guard flag.
28775 - Check for and recover from inconsistency in the microdescriptor
28776 cache. This will make it harder for us to accidentally free a
28777 microdescriptor without removing it from the appropriate data
28778 structures. Fixes issue 3135; issue noted by "wanoskarnet".
28779 - Log SSL state transitions at log level DEBUG, log domain
28780 HANDSHAKE. This can be useful for debugging censorship events.
28781 Implements ticket 3264.
28782 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
28783 implements ticket 3439.
28785 o Minor bugfixes (on 0.2.3.1-alpha):
28786 - Do not free all general-purpose regular descriptors just
28787 because microdescriptor use is enabled. Fixes bug 3113.
28788 - Correctly link libevent_openssl when --enable-static-libevent
28789 is passed to configure. Fixes bug 3118.
28790 - Bridges should not complain during their heartbeat log messages that
28791 they are unlisted in the consensus: that's more or less the point
28792 of being a bridge. Fixes bug 3183.
28793 - Report a SIGNAL event to controllers when acting on a delayed
28794 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
28795 event to the controller if we acted on a SIGNAL NEWNYM command
28796 immediately, and otherwise not report a SIGNAL event for the
28797 command at all. Fixes bug 3349.
28798 - Fix a crash when handling the SIGNAL controller command or
28799 reporting ERR-level status events with bufferevents enabled. Found
28800 by Robert Ransom. Fixes bug 3367.
28801 - Always ship the tor-fw-helper manpage in our release tarballs.
28802 Fixes bug 3389. Reported by Stephen Walker.
28803 - Fix a class of double-mark-for-close bugs when bufferevents
28804 are enabled. Fixes bug 3403.
28805 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
28806 - Add SIGNAL to the list returned by the 'GETINFO events/names'
28807 control-port command. Fixes part of bug 3465.
28808 - Prevent using negative indices during unit test runs when read_all()
28809 fails. Spotted by coverity.
28810 - Fix a rare memory leak when checking the nodelist without it being
28811 present. Found by coverity.
28812 - Only try to download a microdescriptor-flavored consensus from
28813 a directory cache that provides them.
28815 o Minor bugfixes (on 0.2.2.x and earlier):
28816 - Assert that hidden-service-related operations are not performed
28817 using single-hop circuits. Previously, Tor would assert that
28818 client-side streams are not attached to single-hop circuits,
28819 but not that other sensitive operations on the client and service
28820 side are not performed using single-hop circuits. Fixes bug 3332;
28822 - Don't publish a new relay descriptor when we reload our onion key,
28823 unless the onion key has actually changed. Fixes bug 3263 and
28824 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
28825 - Allow GETINFO fingerprint to return a fingerprint even when
28826 we have not yet built a router descriptor. Fixes bug 3577;
28827 bugfix on 0.2.0.1-alpha.
28828 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
28829 on 0.2.2.4-alpha; fixes bug 3427.
28831 o Code simplification and refactoring:
28832 - Use tor_sscanf() in place of scanf() in more places through the
28833 code. This makes us a little more locale-independent, and
28834 should help shut up code-analysis tools that can't tell
28835 a safe sscanf string from a dangerous one.
28836 - Use tt_assert(), not tor_assert(), for checking for test failures.
28837 This makes the unit tests more able to go on in the event that
28839 - Split connection_about_to_close() into separate functions for each
28843 - On Windows, we now define the _WIN32_WINNT macros only if they
28844 are not already defined. This lets the person building Tor decide,
28845 if they want, to require a later version of Windows.
28848 Changes in version 0.2.2.30-rc - 2011-07-07
28849 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
28850 series. It fixes a few smaller bugs, but generally appears stable.
28851 Please test it and let us know whether it is!
28854 - Send a SUCCEEDED stream event to the controller when a reverse
28855 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
28856 discovered by katmagic.
28857 - Always NUL-terminate the sun_path field of a sockaddr_un before
28858 passing it to the kernel. (Not a security issue: kernels are
28859 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28860 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28861 - Don't stack-allocate the list of supplementary GIDs when we're
28862 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28863 could take up to 256K, which is way too much stack. Found by
28864 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28865 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
28866 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
28867 fixes part of bug 3465.
28868 - Fix a memory leak when receiving a descriptor for a hidden
28869 service we didn't ask for. Found by Coverity; CID #30. Bugfix
28873 - Update to the July 1 2011 Maxmind GeoLite Country database.
28876 Changes in version 0.2.2.29-beta - 2011-06-20
28877 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
28878 have bridge lines in their torrc but don't want to use them; gets
28879 us closer to having the control socket feature working on Debian;
28880 and fixes a variety of smaller bugs.
28883 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
28884 When we changed the default behavior to "use bridges if any
28885 are listed in the torrc", we surprised users who had bridges
28886 in their torrc files but who didn't actually want to use them.
28887 Partial resolution for bug 3354.
28890 - Don't attach new streams to old rendezvous circuits after SIGNAL
28891 NEWNYM. Previously, we would keep using an existing rendezvous
28892 circuit if it remained open (i.e. if it were kept open by a
28893 long-lived stream, or if a new stream were attached to it before
28894 Tor could notice that it was old and no longer in use). Bugfix on
28895 0.1.1.15-rc; fixes bug 3375.
28898 - Fix a bug when using ControlSocketsGroupWritable with User. The
28899 directory's group would be checked against the current group, not
28900 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
28901 bugfix on 0.2.2.26-beta.
28902 - Make connection_printf_to_buf()'s behavior sane. Its callers
28903 expect it to emit a CRLF iff the format string ends with CRLF;
28904 it actually emitted a CRLF iff (a) the format string ended with
28905 CRLF or (b) the resulting string was over 1023 characters long or
28906 (c) the format string did not end with CRLF *and* the resulting
28907 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
28908 fixes part of bug 3407.
28909 - Make send_control_event_impl()'s behavior sane. Its callers
28910 expect it to always emit a CRLF at the end of the string; it
28911 might have emitted extra control characters as well. Bugfix on
28912 0.1.1.9-alpha; fixes another part of bug 3407.
28913 - Make crypto_rand_int() check the value of its input correctly.
28914 Previously, it accepted values up to UINT_MAX, but could return a
28915 negative number if given a value above INT_MAX+1. Found by George
28916 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
28917 - Avoid a segfault when reading a malformed circuit build state
28918 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
28920 - When asked about a DNS record type we don't support via a
28921 client DNSPort, reply with NOTIMPL rather than an empty
28922 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
28923 - Fix a rare memory leak during stats writing. Found by coverity.
28926 - Update to the June 1 2011 Maxmind GeoLite Country database.
28928 o Code simplifications and refactoring:
28929 - Remove some dead code as indicated by coverity.
28930 - Remove a few dead assignments during router parsing. Found by
28932 - Add some forgotten return value checks during unit tests. Found
28934 - Don't use 1-bit wide signed bit fields. Found by coverity.
28937 Changes in version 0.2.2.28-beta - 2011-06-04
28938 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
28939 fixed a big bug in whether relays stay in the consensus consistently,
28940 we moved closer to handling bridges and hidden services correctly,
28941 and we started the process of better handling the dreaded "my Vidalia
28942 died, and now my Tor demands a password when I try to reconnect to it"
28946 - Don't decide to make a new descriptor when receiving a HUP signal.
28947 This bug has caused a lot of 0.2.2.x relays to disappear from the
28948 consensus periodically. Fixes the most common case of triggering
28949 bug 1810; bugfix on 0.2.2.7-alpha.
28950 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
28951 - Don't try to build descriptors if "ORPort auto" is set and we
28952 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
28954 - Resolve a crash that occurred when setting BridgeRelay to 1 with
28955 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
28956 - Apply circuit timeouts to opened hidden-service-related circuits
28957 based on the correct start time. Previously, we would apply the
28958 circuit build timeout based on time since the circuit's creation;
28959 it was supposed to be applied based on time since the circuit
28960 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
28961 - Use the same circuit timeout for client-side introduction
28962 circuits as for other four-hop circuits, rather than the timeout
28963 for single-hop directory-fetch circuits; the shorter timeout may
28964 have been appropriate with the static circuit build timeout in
28965 0.2.1.x and earlier, but caused many hidden service access attempts
28966 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
28967 on 0.2.2.2-alpha; fixes another part of bug 1297.
28968 - In ticket 2511 we fixed a case where you could use an unconfigured
28969 bridge if you had configured it as a bridge the last time you ran
28970 Tor. Now fix another edge case: if you had configured it as a bridge
28971 but then switched to a different bridge via the controller, you
28972 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
28976 - Add an __OwningControllerProcess configuration option and a
28977 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
28978 that when it exits, Tor will shut down. Implements feature 3049.
28979 - If "UseBridges 1" is set and no bridges are configured, Tor will
28980 now refuse to build any circuits until some bridges are set.
28981 If "UseBridges auto" is set, Tor will use bridges if they are
28982 configured and we are not running as a server, but otherwise will
28983 make circuits as usual. The new default is "auto". Patch by anonym,
28984 so the Tails LiveCD can stop automatically revealing you as a Tor
28988 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28989 - Remove a trailing asterisk from "exit-policy/default" in the
28990 output of the control port command "GETINFO info/names". Bugfix
28992 - Use a wide type to hold sockets when built for 64-bit Windows builds.
28994 - Warn when the user configures two HiddenServiceDir lines that point
28995 to the same directory. Bugfix on 0.0.6 (the version introducing
28996 HiddenServiceDir); fixes bug 3289.
28997 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
28998 part of bug 2748; bugfix on 0.2.0.10-alpha.
28999 - Log malformed requests for rendezvous descriptors as protocol
29000 warnings, not warnings. Also, use a more informative log message
29001 in case someone sees it at log level warning without prior
29002 info-level messages. Fixes the other part of bug 2748; bugfix
29004 - Clear the table recording the time of the last request for each
29005 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
29006 Previously, we would clear our HS descriptor cache on SIGNAL
29007 NEWNYM, but if we had previously retrieved a descriptor (or tried
29008 to) from every directory responsible for it, we would refuse to
29009 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
29011 - Fix a log message that said "bits" while displaying a value in
29012 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
29014 - When checking for 1024-bit keys, check for 1024 bits, not 128
29015 bytes. This allows Tor to correctly discard keys of length 1017
29016 through 1023. Bugfix on 0.0.9pre5.
29019 - Relays now log the reason for publishing a new relay descriptor,
29020 so we have a better chance of hunting down instances of bug 1810.
29021 Resolves ticket 3252.
29022 - Revise most log messages that refer to nodes by nickname to
29023 instead use the "$key=nickname at address" format. This should be
29024 more useful, especially since nicknames are less and less likely
29025 to be unique. Resolves ticket 3045.
29026 - Log (at info level) when purging pieces of hidden-service-client
29027 state because of SIGNAL NEWNYM.
29030 - Remove undocumented option "-F" from tor-resolve: it hasn't done
29031 anything since 0.2.1.16-rc.
29034 Changes in version 0.2.2.27-beta - 2011-05-18
29035 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
29036 release, and also adds a few more general bugfixes.
29039 - Fix a crash bug when changing bridges in a running Tor process.
29040 Fixes bug 3213; bugfix on 0.2.2.26-beta.
29041 - When the controller configures a new bridge, don't wait 10 to 60
29042 seconds before trying to fetch its descriptor. Bugfix on
29043 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
29046 - Require that onion keys have exponent 65537 in microdescriptors too.
29047 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
29048 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
29049 Changed the limit to 512 characters by removing base64 newlines.
29050 Fixes bug 2752. Fix by Michael Yakubovich.
29051 - When a client starts or stops using bridges, never use a circuit
29052 that was built before the configuration change. This behavior could
29053 put at risk a user who uses bridges to ensure that her traffic
29054 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
29058 Changes in version 0.2.2.26-beta - 2011-05-17
29059 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
29060 also introduces a new "socksport auto" approach that should make it
29061 easier to run multiple Tors on the same system, and does a lot of
29062 cleanup to get us closer to a release candidate.
29064 o Security/privacy fixes:
29065 - Replace all potentially sensitive memory comparison operations
29066 with versions whose runtime does not depend on the data being
29067 compared. This will help resist a class of attacks where an
29068 adversary can use variations in timing information to learn
29069 sensitive data. Fix for one case of bug 3122. (Safe memcmp
29070 implementation by Robert Ransom based partially on code by DJB.)
29071 - When receiving a hidden service descriptor, check that it is for
29072 the hidden service we wanted. Previously, Tor would store any
29073 hidden service descriptors that a directory gave it, whether it
29074 wanted them or not. This wouldn't have let an attacker impersonate
29075 a hidden service, but it did let directories pre-seed a client
29076 with descriptors that it didn't want. Bugfix on 0.0.6.
29077 - On SIGHUP, do not clear out all TrackHostExits mappings, client
29078 DNS cache entries, and virtual address mappings: that's what
29079 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
29082 - The options SocksPort, ControlPort, and so on now all accept a
29083 value "auto" that opens a socket on an OS-selected port. A
29084 new ControlPortWriteToFile option tells Tor to write its
29085 actual control port or ports to a chosen file. If the option
29086 ControlPortFileGroupReadable is set, the file is created as
29087 group-readable. Now users can run two Tor clients on the same
29088 system without needing to manually mess with parameters. Resolves
29089 part of ticket 3076.
29090 - Set SO_REUSEADDR on all sockets, not just listeners. This should
29091 help busy exit nodes avoid running out of useable ports just
29092 because all the ports have been used in the near past. Resolves
29096 - New "GETINFO net/listeners/(type)" controller command to return
29097 a list of addresses and ports that are bound for listeners for a
29098 given connection type. This is useful when the user has configured
29099 "SocksPort auto" and the controller needs to know which port got
29100 chosen. Resolves another part of ticket 3076.
29101 - Add a new ControlSocketsGroupWritable configuration option: when
29102 it is turned on, ControlSockets are group-writeable by the default
29103 group of the current user. Patch by Jérémy Bobbio; implements
29105 - Tor now refuses to create a ControlSocket in a directory that is
29106 world-readable (or group-readable if ControlSocketsGroupWritable
29107 is 0). This is necessary because some operating systems do not
29108 enforce permissions on an AF_UNIX sockets. Permissions on the
29109 directory holding the socket, however, seems to work everywhere.
29110 - Rate-limit a warning about failures to download v2 networkstatus
29111 documents. Resolves part of bug 1352.
29112 - Backport code from 0.2.3.x that allows directory authorities to
29113 clean their microdescriptor caches. Needed to resolve bug 2230.
29114 - When an HTTPS proxy reports "403 Forbidden", we now explain
29115 what it means rather than calling it an unexpected status code.
29116 Closes bug 2503. Patch from Michael Yakubovich.
29117 - Update to the May 1 2011 Maxmind GeoLite Country database.
29120 - Authorities now clean their microdesc cache periodically and when
29121 reading from disk initially, not only when adding new descriptors.
29122 This prevents a bug where we could lose microdescriptors. Bugfix
29123 on 0.2.2.6-alpha. Fixes bug 2230.
29124 - Do not crash when our configuration file becomes unreadable, for
29125 example due to a permissions change, between when we start up
29126 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
29128 - Avoid a bug that would keep us from replacing a microdescriptor
29129 cache on Windows. (We would try to replace the file while still
29130 holding it open. That's fine on Unix, but Windows doesn't let us
29131 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
29132 - Add missing explanations for the authority-related torrc options
29133 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
29134 man page. Resolves issue 2379.
29135 - As an authority, do not upload our own vote or signature set to
29136 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
29137 it would get flagged as a duplicate. Resolves bug 3026.
29138 - Accept hidden service descriptors if we think we might be a hidden
29139 service directory, regardless of what our consensus says. This
29140 helps robustness, since clients and hidden services can sometimes
29141 have a more up-to-date view of the network consensus than we do,
29142 and if they think that the directory authorities list us a HSDir,
29143 we might actually be one. Related to bug 2732; bugfix on
29145 - When a controller changes TrackHostExits, remove mappings for
29146 hosts that should no longer have their exits tracked. Bugfix on
29148 - When a controller changes VirtualAddrNetwork, remove any mappings
29149 for hosts that were automapped to the old network. Bugfix on
29151 - When a controller changes one of the AutomapHosts* options, remove
29152 any mappings for hosts that should no longer be automapped. Bugfix
29154 - Do not reset the bridge descriptor download status every time we
29155 re-parse our configuration or get a configuration change. Fixes
29156 bug 3019; bugfix on 0.2.0.3-alpha.
29158 o Minor bugfixes (code cleanup):
29159 - When loading the microdesc journal, remember its current size.
29160 In 0.2.2, this helps prevent the microdesc journal from growing
29161 without limit on authorities (who are the only ones to use it in
29162 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
29163 Fix posted by "cypherpunks."
29164 - The microdesc journal is supposed to get rebuilt only if it is
29165 at least _half_ the length of the store, not _twice_ the length
29166 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
29167 - Fix a potential null-pointer dereference while computing a
29168 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
29170 - Avoid a possible null-pointer dereference when rebuilding the mdesc
29171 cache without actually having any descriptors to cache. Bugfix on
29172 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
29173 - If we fail to compute the identity digest of a v3 legacy keypair,
29174 warn, and don't use a buffer-full of junk instead. Bugfix on
29175 0.2.1.1-alpha; fixes bug 3106.
29176 - Resolve an untriggerable issue in smartlist_string_num_isin(),
29177 where if the function had ever in the future been used to check
29178 for the presence of a too-large number, it would have given an
29179 incorrect result. (Fortunately, we only used it for 16-bit
29180 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
29181 - Require that introduction point keys and onion handshake keys
29182 have a public exponent of 65537. Starts to fix bug 3207; bugfix
29185 o Removed features:
29186 - Caches no longer download and serve v2 networkstatus documents
29187 unless FetchV2Networkstatus flag is set: these documents haven't
29188 haven't been used by clients or relays since 0.2.0.x. Resolves
29192 Changes in version 0.2.3.1-alpha - 2011-05-05
29193 Tor 0.2.3.1-alpha adds some new experimental features, including support
29194 for an improved network IO backend, IOCP networking on Windows,
29195 microdescriptor caching, "fast-start" support for streams, and automatic
29196 home router configuration. There are also numerous internal improvements
29197 to try to make the code easier for developers to work with.
29199 This is the first alpha release in a new series, so expect there to be
29200 bugs. Users who would rather test out a more stable branch should
29201 stay with 0.2.2.x for now.
29204 - Tor can now optionally build with the "bufferevents" buffered IO
29205 backend provided by Libevent 2. To use this feature, make sure you
29206 have the latest possible version of Libevent, and pass the
29207 --enable-bufferevents flag to configure when building Tor from
29208 source. This feature will make our networking code more flexible,
29209 let us stack layers on each other, and let us use more efficient
29210 zero-copy transports where available.
29211 - As an experimental feature, Tor can use IOCP for networking on Windows.
29212 Once this code is tuned and optimized, it promises much better
29213 performance than the select-based backend we've used in the past. To
29214 try this feature, you must build Tor with Libevent 2, configure Tor
29215 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
29216 your torrc. There are known bugs here: only try this if you can help
29217 debug it as it breaks.
29218 - The EntryNodes option can now include country codes like {de} or IP
29219 addresses or network masks. Previously we had disallowed these options
29220 because we didn't have an efficient way to keep the list up to
29221 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
29222 - Exit nodes now accept and queue data on not-yet-connected streams.
29223 Previously, the client wasn't allowed to send data until the stream was
29224 connected, which slowed down all connections. This change will enable
29225 clients to perform a "fast-start" on streams and send data without
29226 having to wait for a confirmation that the stream has opened. (Patch
29227 from Ian Goldberg; implements the server side of Proposal 174.)
29228 - Tor now has initial support for automatic port mapping on the many
29229 home routers that support NAT-PMP or UPnP. (Not yet supported on
29230 Windows). To build the support code, you'll need to have libnatpnp
29231 library and/or the libminiupnpc library, and you'll need to enable the
29232 feature specifically by passing "--enable-upnp" and/or
29233 "--enable-natpnp" to configure. To turn it on, use the new
29234 PortForwarding option.
29235 - Caches now download, cache, and serve multiple "flavors" of the
29236 consensus, including a flavor that describes microdescriptors.
29237 - Caches now download, cache, and serve microdescriptors -- small
29238 summaries of router descriptors that are authenticated by all of the
29239 directory authorities. Once enough caches are running this code,
29240 clients will be able to save significant amounts of directory bandwidth
29241 by downloading microdescriptors instead of router descriptors.
29244 - Make logging resolution configurable with a new LogTimeGranularity
29245 option, and change the default from 1 millisecond to 1 second.
29246 Implements enhancement 1668.
29247 - We log which torrc file we're using on startup. Implements ticket
29249 - Ordinarily, Tor does not count traffic from private addresses (like
29250 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
29251 There is now a new option, CountPrivateBandwidth, to disable this
29252 behavior. Patch from Daniel Cagara.
29253 - New --enable-static-tor configure option for building Tor as
29254 statically as possible. Idea, general hackery and thoughts from
29255 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
29257 - If you set the NumCPUs option to 0, Tor will now try to detect how
29258 many CPUs you have. This is the new default behavior.
29259 - Turn on directory request statistics by default and include them in
29260 extra-info descriptors. Don't break if we have no GeoIP database.
29261 - Relays that set "ConnDirectionStatistics 1" write statistics on the
29262 bidirectional use of connections to disk every 24 hours.
29263 - Add a GeoIP file digest to the extra-info descriptor. Implements
29265 - The NodeFamily option -- which let you declare that you want to
29266 consider nodes to be part of a family whether they list themselves
29267 that way or not -- now allows IP address ranges and country codes.
29268 - Add a new 'Heartbeat' log message type to periodically log a message
29269 describing Tor's status at level Notice. This feature is meant for
29270 operators who log at notice, and want to make sure that their Tor
29271 server is still working. Implementation by George Kadianakis.
29273 o Minor bugfixes (on 0.2.2.25-alpha):
29274 - When loading the microdesc journal, remember its current size.
29275 In 0.2.2, this helps prevent the microdesc journal from growing
29276 without limit on authorities (who are the only ones to use it in
29277 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
29278 Fix posted by "cypherpunks."
29279 - The microdesc journal is supposed to get rebuilt only if it is
29280 at least _half_ the length of the store, not _twice_ the length
29281 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
29282 - If as an authority we fail to compute the identity digest of a v3
29283 legacy keypair, warn, and don't use a buffer-full of junk instead.
29284 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
29285 - Authorities now clean their microdesc cache periodically and when
29286 reading from disk initially, not only when adding new descriptors.
29287 This prevents a bug where we could lose microdescriptors. Bugfix
29290 o Minor features (controller):
29291 - Add a new SIGNAL event to the controller interface so that
29292 controllers can be notified when Tor handles a signal. Resolves
29293 issue 1955. Patch by John Brooks.
29294 - Add a new GETINFO option to get total bytes read and written. Patch
29295 from pipe, revised by atagar. Resolves ticket 2345.
29296 - Implement some GETINFO controller fields to provide information about
29297 the Tor process's pid, euid, username, and resource limits.
29300 - Our build system requires automake 1.6 or later to create the
29301 Makefile.in files. Previously, you could have used 1.4.
29302 This only affects developers and people building Tor from git;
29303 people who build Tor from the source distribution without changing
29304 the Makefile.am files should be fine.
29305 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
29306 so on. This is more robust against some of the failure modes
29307 associated with running the autotools pieces on their own.
29309 o Minor packaging issues:
29310 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
29311 already created. Patch from Andreas Stieger. Fixes bug 2573.
29313 o Code simplifications and refactoring:
29314 - A major revision to our internal node-selecting and listing logic.
29315 Tor already had at least two major ways to look at the question of
29316 "which Tor servers do we know about": a list of router descriptors,
29317 and a list of entries in the current consensus. With
29318 microdescriptors, we're adding a third. Having so many systems
29319 without an abstraction layer over them was hurting the codebase.
29320 Now, we have a new "node_t" abstraction that presents a consistent
29321 interface to a client's view of a Tor node, and holds (nearly) all
29322 of the mutable state formerly in routerinfo_t and routerstatus_t.
29323 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
29324 no longer link against Libevent: they never used it, but
29325 our library structure used to force them to link it.
29327 o Removed features:
29328 - Remove some old code to work around even older versions of Tor that
29329 used forked processes to handle DNS requests. Such versions of Tor
29330 are no longer in use as servers.
29332 o Documentation fixes:
29333 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
29334 - Add missing documentation for the authority-related torrc options
29335 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
29339 Changes in version 0.2.2.25-alpha - 2011-04-29
29340 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
29341 robust, routers no longer overreport their bandwidth, Win7 should crash
29342 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
29343 now prevents hidden service-related activity from being linkable. It
29344 provides more information to Vidalia so you can see if your bridge is
29345 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
29346 StrictNodes configuration options to make them more reliable, more
29347 understandable, and more regularly applied. If you use those options,
29348 please see the revised documentation for them in the manual page.
29351 - Relays were publishing grossly inflated bandwidth values because
29352 they were writing their state files wrong--now they write the
29353 correct value. Also, resume reading bandwidth history from the
29354 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
29355 - Improve hidden service robustness: When we find that we have
29356 extended a hidden service's introduction circuit to a relay not
29357 listed as an introduction point in the HS descriptor we currently
29358 have, retry with an introduction point from the current
29359 descriptor. Previously we would just give up. Fixes bugs 1024 and
29360 1930; bugfix on 0.2.0.10-alpha.
29361 - Clients now stop trying to use an exit node associated with a given
29362 destination by TrackHostExits if they fail to reach that exit node.
29363 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
29364 - Fix crash bug on platforms where gmtime and localtime can return
29365 NULL. Windows 7 users were running into this one. Fixes part of bug
29366 2077. Bugfix on all versions of Tor. Found by boboper.
29368 o Security and stability fixes:
29369 - Don't double-free a parsable, but invalid, microdescriptor, even if
29370 it is followed in the blob we're parsing by an unparsable
29371 microdescriptor. Fixes an issue reported in a comment on bug 2954.
29372 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
29373 - If the Nickname configuration option isn't given, Tor would pick a
29374 nickname based on the local hostname as the nickname for a relay.
29375 Because nicknames are not very important in today's Tor and the
29376 "Unnamed" nickname has been implemented, this is now problematic
29377 behavior: It leaks information about the hostname without being
29378 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
29379 introduced the Unnamed nickname. Reported by tagnaq.
29380 - Fix an uncommon assertion failure when running with DNSPort under
29381 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
29382 - Avoid linkability based on cached hidden service descriptors: forget
29383 all hidden service descriptors cached as a client when processing a
29384 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
29387 - Export GeoIP information on bridge usage to controllers even if we
29388 have not yet been running for 24 hours. Now Vidalia bridge operators
29389 can get more accurate and immediate feedback about their
29390 contributions to the network.
29392 o Major features and bugfixes (node selection):
29393 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
29394 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
29395 options. Previously, we had been ambiguous in describing what
29396 counted as an "exit" node, and what operations exactly "StrictNodes
29397 0" would permit. This created confusion when people saw nodes built
29398 through unexpected circuits, and made it hard to tell real bugs from
29399 surprises. Now the intended behavior is:
29400 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
29401 a node that delivers user traffic outside the Tor network.
29402 . "Entry", in the context of EntryNodes, means a node used as the
29403 first hop of a multihop circuit. It doesn't include direct
29404 connections to directory servers.
29405 . "ExcludeNodes" applies to all nodes.
29406 . "StrictNodes" changes the behavior of ExcludeNodes only. When
29407 StrictNodes is set, Tor should avoid all nodes listed in
29408 ExcludeNodes, even when it will make user requests fail. When
29409 StrictNodes is *not* set, then Tor should follow ExcludeNodes
29410 whenever it can, except when it must use an excluded node to
29411 perform self-tests, connect to a hidden service, provide a
29412 hidden service, fulfill a .exit request, upload directory
29413 information, or fetch directory information.
29414 Collectively, the changes to implement the behavior fix bug 1090.
29415 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
29416 a node is listed in both, it's treated as excluded.
29417 - ExcludeNodes now applies to directory nodes -- as a preference if
29418 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
29419 Don't exclude all the directory authorities and set StrictNodes to 1
29420 unless you really want your Tor to break.
29421 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
29422 - ExcludeExitNodes now overrides .exit requests.
29423 - We don't use bridges listed in ExcludeNodes.
29424 - When StrictNodes is 1:
29425 . We now apply ExcludeNodes to hidden service introduction points
29426 and to rendezvous points selected by hidden service users. This
29427 can make your hidden service less reliable: use it with caution!
29428 . If we have used ExcludeNodes on ourself, do not try relay
29429 reachability self-tests.
29430 . If we have excluded all the directory authorities, we will not
29431 even try to upload our descriptor if we're a relay.
29432 . Do not honor .exit requests to an excluded node.
29433 - Remove a misfeature that caused us to ignore the Fast/Stable flags
29434 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
29435 - When the set of permitted nodes changes, we now remove any mappings
29436 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
29438 - We never cannibalize a circuit that had excluded nodes on it, even
29439 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
29440 - Revert a change where we would be laxer about attaching streams to
29441 circuits than when building the circuits. This was meant to prevent
29442 a set of bugs where streams were never attachable, but our improved
29443 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
29444 - Keep track of how many times we launch a new circuit to handle a
29445 given stream. Too many launches could indicate an inconsistency
29446 between our "launch a circuit to handle this stream" logic and our
29447 "attach this stream to one of the available circuits" logic.
29448 - Improve log messages related to excluded nodes.
29451 - Fix a spurious warning when moving from a short month to a long
29452 month on relays with month-based BandwidthAccounting. Bugfix on
29453 0.2.2.17-alpha; fixes bug 3020.
29454 - When a client finds that an origin circuit has run out of 16-bit
29455 stream IDs, we now mark it as unusable for new streams. Previously,
29456 we would try to close the entire circuit. Bugfix on 0.0.6.
29457 - Add a forgotten cast that caused a compile warning on OS X 10.6.
29458 Bugfix on 0.2.2.24-alpha.
29459 - Be more careful about reporting the correct error from a failed
29460 connect() system call. Under some circumstances, it was possible to
29461 look at an incorrect value for errno when sending the end reason.
29462 Bugfix on 0.1.0.1-rc.
29463 - Correctly handle an "impossible" overflow cases in connection byte
29464 counting, where we write or read more than 4GB on an edge connection
29465 in a single second. Bugfix on 0.1.2.8-beta.
29466 - Correct the warning displayed when a rendezvous descriptor exceeds
29467 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
29469 - Clients and hidden services now use HSDir-flagged relays for hidden
29470 service descriptor downloads and uploads even if the relays have no
29471 DirPort set and the client has disabled TunnelDirConns. This will
29472 eventually allow us to give the HSDir flag to relays with no
29473 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
29474 - Downgrade "no current certificates known for authority" message from
29475 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
29476 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
29477 2917. Bugfix on 0.1.1.1-alpha.
29478 - Only limit the lengths of single HS descriptors, even when multiple
29479 HS descriptors are published to an HSDir relay in a single POST
29480 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
29481 - Write the current time into the LastWritten line in our state file,
29482 rather than the time from the previous write attempt. Also, stop
29483 trying to use a time of -1 in our log statements. Fixes bug 3039;
29484 bugfix on 0.2.2.14-alpha.
29485 - Be more consistent in our treatment of file system paths. "~" should
29486 get expanded to the user's home directory in the Log config option.
29487 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
29488 feature for the -f and --DataDirectory options.
29491 - Make sure every relay writes a state file at least every 12 hours.
29492 Previously, a relay could go for weeks without writing its state
29493 file, and on a crash could lose its bandwidth history, capacity
29494 estimates, client country statistics, and so on. Addresses bug 3012.
29495 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
29496 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
29497 clients are already deprecated because of security bugs.
29498 - Don't allow v0 hidden service authorities to act as clients.
29499 Required by fix for bug 3000.
29500 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
29501 by fix for bug 3000.
29502 - Ensure that no empty [dirreq-](read|write)-history lines are added
29503 to an extrainfo document. Implements ticket 2497.
29505 o Code simplification and refactoring:
29506 - Remove workaround code to handle directory responses from servers
29507 that had bug 539 (they would send HTTP status 503 responses _and_
29508 send a body too). Since only server versions before
29509 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
29510 keep the workaround in place.
29511 - Remove the old 'fuzzy time' logic. It was supposed to be used for
29512 handling calculations where we have a known amount of clock skew and
29513 an allowed amount of unknown skew. But we only used it in three
29514 places, and we never adjusted the known/unknown skew values. This is
29515 still something we might want to do someday, but if we do, we'll
29516 want to do it differently.
29517 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
29518 None of the cases where we did this before were wrong, but by making
29519 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
29520 - Use GetTempDir to find the proper temporary directory location on
29521 Windows when generating temporary files for the unit tests. Patch by
29525 Changes in version 0.2.2.24-alpha - 2011-04-08
29526 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
29527 prevented Tor clients from effectively using "multihomed" bridges,
29528 that is, bridges that listen on multiple ports or IP addresses so users
29529 can continue to use some of their addresses even if others get blocked.
29532 - Fix a bug where bridge users who configure the non-canonical
29533 address of a bridge automatically switch to its canonical
29534 address. If a bridge listens at more than one address, it should be
29535 able to advertise those addresses independently and any non-blocked
29536 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
29538 - If you configured Tor to use bridge A, and then quit and
29539 configured Tor to use bridge B instead, it would happily continue
29540 to use bridge A if it's still reachable. While this behavior is
29541 a feature if your goal is connectivity, in some scenarios it's a
29542 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
29543 - Directory authorities now use data collected from their own
29544 uptime observations when choosing whether to assign the HSDir flag
29545 to relays, instead of trusting the uptime value the relay reports in
29546 its descriptor. This change helps prevent an attack where a small
29547 set of nodes with frequently-changing identity keys can blackhole
29548 a hidden service. (Only authorities need upgrade; others will be
29549 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
29552 - When we restart our relay, we might get a successful connection
29553 from the outside before we've started our reachability tests,
29554 triggering a warning: "ORPort found reachable, but I have no
29555 routerinfo yet. Failing to inform controller of success." This
29556 bug was harmless unless Tor is running under a controller
29557 like Vidalia, in which case the controller would never get a
29558 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
29560 - Make directory authorities more accurate at recording when
29561 relays that have failed several reachability tests became
29562 unreachable, so we can provide more accuracy at assigning Stable,
29563 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
29564 - Fix an issue that prevented static linking of libevent on
29565 some platforms (notably Linux). Fixes bug 2698; bugfix on
29566 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
29567 the --with-static-libevent configure option).
29568 - We now ask the other side of a stream (the client or the exit)
29569 for more data on that stream when the amount of queued data on
29570 that stream dips low enough. Previously, we wouldn't ask the
29571 other side for more data until either it sent us more data (which
29572 it wasn't supposed to do if it had exhausted its window!) or we
29573 had completely flushed all our queued data. This flow control fix
29574 should improve throughput. Fixes bug 2756; bugfix on the earliest
29575 released versions of Tor (svn commit r152).
29576 - Avoid a double-mark-for-free warning when failing to attach a
29577 transparent proxy connection. (We thought we had fixed this in
29578 0.2.2.23-alpha, but it turns out our fix was checking the wrong
29579 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
29580 bug) and 0.2.2.23-alpha (the incorrect fix).
29581 - When warning about missing zlib development packages during compile,
29582 give the correct package names. Bugfix on 0.2.0.1-alpha.
29585 - Directory authorities now log the source of a rejected POSTed v3
29586 networkstatus vote.
29587 - Make compilation with clang possible when using
29588 --enable-gcc-warnings by removing two warning options that clang
29589 hasn't implemented yet and by fixing a few warnings. Implements
29591 - When expiring circuits, use microsecond timers rather than
29592 one-second timers. This can avoid an unpleasant situation where a
29593 circuit is launched near the end of one second and expired right
29594 near the beginning of the next, and prevent fluctuations in circuit
29596 - Use computed circuit-build timeouts to decide when to launch
29597 parallel introduction circuits for hidden services. (Previously,
29598 we would retry after 15 seconds.)
29599 - Update to the April 1 2011 Maxmind GeoLite Country database.
29602 - Create the /var/run/tor directory on startup on OpenSUSE if it is
29603 not already created. Patch from Andreas Stieger. Fixes bug 2573.
29605 o Documentation changes:
29606 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
29607 - Resolve all doxygen warnings except those for missing documentation.
29609 - Add doxygen documentation for more functions, fields, and types.
29612 Changes in version 0.2.2.23-alpha - 2011-03-08
29613 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
29614 they restart they don't lose their bandwidth capacity estimate. This
29615 release also fixes a diverse set of user-facing bugs, ranging from
29616 relays overrunning their rate limiting to clients falsely warning about
29617 clock skew to bridge descriptor leaks by our bridge directory authority.
29620 - Stop sending a CLOCK_SKEW controller status event whenever
29621 we fetch directory information from a relay that has a wrong clock.
29622 Instead, only inform the controller when it's a trusted authority
29623 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29624 the rest of bug 1074.
29625 - Fix an assert in parsing router descriptors containing IPv6
29626 addresses. This one took down the directory authorities when
29627 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
29628 - Make the bridge directory authority refuse to answer directory
29629 requests for "all" descriptors. It used to include bridge
29630 descriptors in its answer, which was a major information leak.
29631 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
29632 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29633 Tor would ignore their RelayBandwidthBurst setting,
29634 potentially using more bandwidth than expected. Bugfix on
29635 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29636 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29637 hidserv" in her torrc. The 'hidserv' argument never controlled
29638 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29641 - Relays now save observed peak bandwidth throughput rates to their
29642 state file (along with total usage, which was already saved)
29643 so that they can determine their correct estimated bandwidth on
29644 restart. Resolves bug 1863, where Tor relays would reset their
29645 estimated bandwidth to 0 after restarting.
29646 - Directory authorities now take changes in router IP address and
29647 ORPort into account when determining router stability. Previously,
29648 if a router changed its IP or ORPort, the authorities would not
29649 treat it as having any downtime for the purposes of stability
29650 calculation, whereas clients would experience downtime since the
29651 change could take a while to propagate to them. Resolves issue 1035.
29652 - Enable Address Space Layout Randomization (ASLR) and Data Execution
29653 Prevention (DEP) by default on Windows to make it harder for
29654 attackers to exploit vulnerabilities. Patch from John Brooks.
29656 o Minor bugfixes (on 0.2.1.x and earlier):
29657 - Fix a rare crash bug that could occur when a client was configured
29658 with a large number of bridges. Fixes bug 2629; bugfix on
29659 0.2.1.2-alpha. Bugfix by trac user "shitlei".
29660 - Avoid a double mark-for-free warning when failing to attach a
29661 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
29663 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
29664 found by "cypherpunks". This bug was introduced before the first
29665 Tor release, in svn commit r110.
29666 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
29667 don't mention them in the manpage. Fixes bug 2450; issue
29668 spotted by keb and G-Lo.
29669 - Fix a bug in bandwidth history state parsing that could have been
29670 triggered if a future version of Tor ever changed the timing
29671 granularity at which bandwidth history is measured. Bugfix on
29672 Tor 0.1.1.11-alpha.
29673 - When a relay decides that its DNS is too broken for it to serve
29674 as an exit server, it advertised itself as a non-exit, but
29675 continued to act as an exit. This could create accidental
29676 partitioning opportunities for users. Instead, if a relay is
29677 going to advertise reject *:* as its exit policy, it should
29678 really act with exit policy "reject *:*". Fixes bug 2366.
29679 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
29680 - In the special case where you configure a public exit relay as your
29681 bridge, Tor would be willing to use that exit relay as the last
29682 hop in your circuit as well. Now we fail that circuit instead.
29683 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
29684 - Fix a bug with our locking implementation on Windows that couldn't
29685 correctly detect when a file was already locked. Fixes bug 2504,
29686 bugfix on 0.2.1.6-alpha.
29687 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
29688 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
29690 - Set target port in get_interface_address6() correctly. Bugfix
29691 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
29692 - Directory authorities are now more robust to hops back in time
29693 when calculating router stability. Previously, if a run of uptime
29694 or downtime appeared to be negative, the calculation could give
29695 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
29697 - Fix an assert that got triggered when using the TestingTorNetwork
29698 configuration option and then issuing a GETINFO config-text control
29699 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
29701 o Minor bugfixes (on 0.2.2.x):
29702 - Clients should not weight BadExit nodes as Exits in their node
29703 selection. Similarly, directory authorities should not count BadExit
29704 bandwidth as Exit bandwidth when computing bandwidth-weights.
29705 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
29706 - Correctly clear our dir_read/dir_write history when there is an
29707 error parsing any bw history value from the state file. Bugfix on
29708 Tor 0.2.2.15-alpha.
29709 - Resolve a bug in verifying signatures of directory objects
29710 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
29711 Fixes bug 2409. Found by "piebeer".
29712 - Bridge authorities no longer crash on SIGHUP when they try to
29713 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
29717 - Log less aggressively about circuit timeout changes, and improve
29718 some other circuit timeout messages. Resolves bug 2004.
29719 - Log a little more clearly about the times at which we're no longer
29720 accepting new connections. Resolves bug 2181.
29721 - Reject attempts at the client side to open connections to private
29722 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
29723 a randomly chosen exit node. Attempts to do so are always
29724 ill-defined, generally prevented by exit policies, and usually
29725 in error. This will also help to detect loops in transparent
29726 proxy configurations. You can disable this feature by setting
29727 "ClientRejectInternalAddresses 0" in your torrc.
29728 - Always treat failure to allocate an RSA key as an unrecoverable
29730 - Update to the March 1 2011 Maxmind GeoLite Country database.
29732 o Minor features (log subsystem):
29733 - Add documentation for configuring logging at different severities in
29734 different log domains. We've had this feature since 0.2.1.1-alpha,
29735 but for some reason it never made it into the manpage. Fixes
29737 - Make it simpler to specify "All log domains except for A and B".
29738 Previously you needed to say "[*,~A,~B]". Now you can just say
29740 - Add a "LogMessageDomains 1" option to include the domains of log
29741 messages along with the messages. Without this, there's no way
29742 to use log domains without reading the source or doing a lot
29745 o Packaging changes:
29746 - Stop shipping the Tor specs files and development proposal documents
29747 in the tarball. They are now in a separate git repository at
29748 git://git.torproject.org/torspec.git
29751 Changes in version 0.2.1.30 - 2011-02-23
29752 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
29753 change is a slight tweak to Tor's TLS handshake that makes relays
29754 and bridges that run this new version reachable from Iran again.
29755 We don't expect this tweak will win the arms race long-term, but it
29756 buys us time until we roll out a better solution.
29759 - Stop sending a CLOCK_SKEW controller status event whenever
29760 we fetch directory information from a relay that has a wrong clock.
29761 Instead, only inform the controller when it's a trusted authority
29762 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29763 the rest of bug 1074.
29764 - Fix a bounds-checking error that could allow an attacker to
29765 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29766 Found by "piebeer".
29767 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29768 Tor would ignore their RelayBandwidthBurst setting,
29769 potentially using more bandwidth than expected. Bugfix on
29770 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29771 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29772 hidserv" in her torrc. The 'hidserv' argument never controlled
29773 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29776 - Adjust our TLS Diffie-Hellman parameters to match those used by
29778 - Update to the February 1 2011 Maxmind GeoLite Country database.
29781 - Check for and reject overly long directory certificates and
29782 directory tokens before they have a chance to hit any assertions.
29783 Bugfix on 0.2.1.28. Found by "doorss".
29784 - Bring the logic that gathers routerinfos and assesses the
29785 acceptability of circuits into line. This prevents a Tor OP from
29786 getting locked in a cycle of choosing its local OR as an exit for a
29787 path (due to a .exit request) and then rejecting the circuit because
29788 its OR is not listed yet. It also prevents Tor clients from using an
29789 OR running in the same instance as an exit (due to a .exit request)
29790 if the OR does not meet the same requirements expected of an OR
29791 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29793 o Packaging changes:
29794 - Stop shipping the Tor specs files and development proposal documents
29795 in the tarball. They are now in a separate git repository at
29796 git://git.torproject.org/torspec.git
29797 - Do not include Git version tags as though they are SVN tags when
29798 generating a tarball from inside a repository that has switched
29799 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
29802 Changes in version 0.2.2.22-alpha - 2011-01-25
29803 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
29804 main other change is a slight tweak to Tor's TLS handshake that makes
29805 relays and bridges that run this new version reachable from Iran again.
29806 We don't expect this tweak will win the arms race long-term, but it
29807 will buy us a bit more time until we roll out a better solution.
29810 - Fix a bounds-checking error that could allow an attacker to
29811 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29812 Found by "piebeer".
29813 - Don't assert when changing from bridge to relay or vice versa
29814 via the controller. The assert happened because we didn't properly
29815 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
29816 bug 2433. Reported by bastik.
29819 - Adjust our TLS Diffie-Hellman parameters to match those used by
29821 - Provide a log message stating which geoip file we're parsing
29822 instead of just stating that we're parsing the geoip file.
29823 Implements ticket 2432.
29826 - Check for and reject overly long directory certificates and
29827 directory tokens before they have a chance to hit any assertions.
29828 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
29831 Changes in version 0.2.2.21-alpha - 2011-01-15
29832 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
29833 continues our recent code security audit work. The main fix resolves
29834 a remote heap overflow vulnerability that can allow remote code
29835 execution (CVE-2011-0427). Other fixes address a variety of assert
29836 and crash bugs, most of which we think are hard to exploit remotely.
29838 o Major bugfixes (security), also included in 0.2.1.29:
29839 - Fix a heap overflow bug where an adversary could cause heap
29840 corruption. This bug probably allows remote code execution
29841 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29843 - Prevent a denial-of-service attack by disallowing any
29844 zlib-compressed data whose compression factor is implausibly
29845 high. Fixes part of bug 2324; reported by "doorss".
29846 - Zero out a few more keys in memory before freeing them. Fixes
29847 bug 2384 and part of bug 2385. These key instances found by
29848 "cypherpunks", based on Andrew Case's report about being able
29849 to find sensitive data in Tor's memory space if you have enough
29850 permissions. Bugfix on 0.0.2pre9.
29852 o Major bugfixes (crashes), also included in 0.2.1.29:
29853 - Prevent calls to Libevent from inside Libevent log handlers.
29854 This had potential to cause a nasty set of crashes, especially
29855 if running Libevent with debug logging enabled, and running
29856 Tor with a controller watching for low-severity log messages.
29857 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29858 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29859 underflow errors there too. Fixes the other part of bug 2324.
29860 - Fix a bug where we would assert if we ever had a
29861 cached-descriptors.new file (or another file read directly into
29862 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29863 on 0.2.1.25. Found by doorss.
29864 - Fix some potential asserts and parsing issues with grossly
29865 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29868 o Minor bugfixes (other), also included in 0.2.1.29:
29869 - Fix a bug with handling misformed replies to reverse DNS lookup
29870 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29871 bug reported by doorss.
29872 - Fix compilation on mingw when a pthreads compatibility library
29873 has been installed. (We don't want to use it, so we shouldn't
29874 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29875 - Fix a bug where we would declare that we had run out of virtual
29876 addresses when the address space was only half-exhausted. Bugfix
29878 - Correctly handle the case where AutomapHostsOnResolve is set but
29879 no virtual addresses are available. Fixes bug 2328; bugfix on
29880 0.1.2.1-alpha. Bug found by doorss.
29881 - Correctly handle wrapping around when we run out of virtual
29882 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
29884 o Minor features, also included in 0.2.1.29:
29885 - Update to the January 1 2011 Maxmind GeoLite Country database.
29886 - Introduce output size checks on all of our decryption functions.
29888 o Build changes, also included in 0.2.1.29:
29889 - Tor does not build packages correctly with Automake 1.6 and earlier;
29890 added a check to Makefile.am to make sure that we're building with
29891 Automake 1.7 or later.
29892 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29893 because we built it with a too-old version of automake. Thus that
29894 release broke ./configure --enable-openbsd-malloc, which is popular
29895 among really fast exit relays on Linux.
29897 o Major bugfixes, new in 0.2.2.21-alpha:
29898 - Prevent crash/heap corruption when the cbtnummodes consensus
29899 parameter is set to 0 or large values. Fixes bug 2317; bugfix
29902 o Major features, new in 0.2.2.21-alpha:
29903 - Introduce minimum/maximum values that clients will believe
29904 from the consensus. Now we'll have a better chance to avoid crashes
29905 or worse when a consensus param has a weird value.
29907 o Minor features, new in 0.2.2.21-alpha:
29908 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
29909 used on bridges, and it makes bridge scanning somewhat easier.
29910 - If writing the state file to disk fails, wait up to an hour before
29911 retrying again, rather than trying again each second. Fixes bug
29912 2346; bugfix on Tor 0.1.1.3-alpha.
29913 - Make Libevent log messages get delivered to controllers later,
29914 and not from inside the Libevent log handler. This prevents unsafe
29915 reentrant Libevent calls while still letting the log messages
29917 - Detect platforms that brokenly use a signed size_t, and refuse to
29918 build there. Found and analyzed by doorss and rransom.
29919 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
29922 o Minor bugfixes, new in 0.2.2.21-alpha:
29923 - Handle SOCKS messages longer than 128 bytes long correctly, rather
29924 than waiting forever for them to finish. Fixes bug 2330; bugfix
29925 on 0.2.0.16-alpha. Found by doorss.
29926 - Add assertions to check for overflow in arguments to
29927 base32_encode() and base32_decode(); fix a signed-unsigned
29928 comparison there too. These bugs are not actually reachable in Tor,
29929 but it's good to prevent future errors too. Found by doorss.
29930 - Correctly detect failures to create DNS requests when using Libevent
29931 versions before v2. (Before Libevent 2, we used our own evdns
29932 implementation. Its return values for Libevent's evdns_resolve_*()
29933 functions are not consistent with those from Libevent.) Fixes bug
29934 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
29936 o Documentation, new in 0.2.2.21-alpha:
29937 - Document the default socks host and port (127.0.0.1:9050) for
29941 Changes in version 0.2.1.29 - 2011-01-15
29942 Tor 0.2.1.29 continues our recent code security audit work. The main
29943 fix resolves a remote heap overflow vulnerability that can allow remote
29944 code execution. Other fixes address a variety of assert and crash bugs,
29945 most of which we think are hard to exploit remotely.
29947 o Major bugfixes (security):
29948 - Fix a heap overflow bug where an adversary could cause heap
29949 corruption. This bug probably allows remote code execution
29950 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29952 - Prevent a denial-of-service attack by disallowing any
29953 zlib-compressed data whose compression factor is implausibly
29954 high. Fixes part of bug 2324; reported by "doorss".
29955 - Zero out a few more keys in memory before freeing them. Fixes
29956 bug 2384 and part of bug 2385. These key instances found by
29957 "cypherpunks", based on Andrew Case's report about being able
29958 to find sensitive data in Tor's memory space if you have enough
29959 permissions. Bugfix on 0.0.2pre9.
29961 o Major bugfixes (crashes):
29962 - Prevent calls to Libevent from inside Libevent log handlers.
29963 This had potential to cause a nasty set of crashes, especially
29964 if running Libevent with debug logging enabled, and running
29965 Tor with a controller watching for low-severity log messages.
29966 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29967 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29968 underflow errors there too. Fixes the other part of bug 2324.
29969 - Fix a bug where we would assert if we ever had a
29970 cached-descriptors.new file (or another file read directly into
29971 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29972 on 0.2.1.25. Found by doorss.
29973 - Fix some potential asserts and parsing issues with grossly
29974 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29977 o Minor bugfixes (other):
29978 - Fix a bug with handling misformed replies to reverse DNS lookup
29979 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29980 bug reported by doorss.
29981 - Fix compilation on mingw when a pthreads compatibility library
29982 has been installed. (We don't want to use it, so we shouldn't
29983 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29984 - Fix a bug where we would declare that we had run out of virtual
29985 addresses when the address space was only half-exhausted. Bugfix
29987 - Correctly handle the case where AutomapHostsOnResolve is set but
29988 no virtual addresses are available. Fixes bug 2328; bugfix on
29989 0.1.2.1-alpha. Bug found by doorss.
29990 - Correctly handle wrapping around to when we run out of virtual
29991 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
29992 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29993 because we built it with a too-old version of automake. Thus that
29994 release broke ./configure --enable-openbsd-malloc, which is popular
29995 among really fast exit relays on Linux.
29998 - Update to the January 1 2011 Maxmind GeoLite Country database.
29999 - Introduce output size checks on all of our decryption functions.
30002 - Tor does not build packages correctly with Automake 1.6 and earlier;
30003 added a check to Makefile.am to make sure that we're building with
30004 Automake 1.7 or later.
30007 Changes in version 0.2.2.20-alpha - 2010-12-17
30008 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
30009 exploitable bugs. We also fix a variety of other significant bugs,
30010 change the IP address for one of our directory authorities, and update
30011 the minimum version that Tor relays must run to join the network.
30014 - Fix a remotely exploitable bug that could be used to crash instances
30015 of Tor remotely by overflowing on the heap. Remote-code execution
30016 hasn't been confirmed, but can't be ruled out. Everyone should
30017 upgrade. Bugfix on the 0.1.1 series and later.
30018 - Fix a bug that could break accounting on 64-bit systems with large
30019 time_t values, making them hibernate for impossibly long intervals.
30020 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
30021 - Fix a logic error in directory_fetches_from_authorities() that
30022 would cause all _non_-exits refusing single-hop-like circuits
30023 to fetch from authorities, when we wanted to have _exits_ fetch
30024 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
30026 - Fix a stream fairness bug that would cause newer streams on a given
30027 circuit to get preference when reading bytes from the origin or
30028 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
30029 introduced before the first Tor release, in svn revision r152.
30031 o Directory authority changes:
30032 - Change IP address and ports for gabelmoo (v3 directory authority).
30035 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
30036 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
30037 - Fix an off-by-one error in calculating some controller command
30038 argument lengths. Fortunately, this mistake is harmless since
30039 the controller code does redundant NUL termination too. Found by
30040 boboper. Bugfix on 0.1.1.1-alpha.
30041 - Do not dereference NULL if a bridge fails to build its
30042 extra-info descriptor. Found by an anonymous commenter on
30043 Trac. Bugfix on 0.2.2.19-alpha.
30046 - Update to the December 1 2010 Maxmind GeoLite Country database.
30047 - Directory authorities now reject relays running any versions of
30048 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
30049 known bugs that keep RELAY_EARLY cells from working on rendezvous
30050 circuits. Followup to fix for bug 2081.
30051 - Directory authorities now reject relays running any version of Tor
30052 older than 0.2.0.26-rc. That version is the earliest that fetches
30053 current directory information correctly. Fixes bug 2156.
30054 - Report only the top 10 ports in exit-port stats in order not to
30055 exceed the maximum extra-info descriptor length of 50 KB. Implements
30059 Changes in version 0.2.1.28 - 2010-12-17
30060 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
30061 exploitable bugs. We also took this opportunity to change the IP address
30062 for one of our directory authorities, and to update the geoip database
30066 - Fix a remotely exploitable bug that could be used to crash instances
30067 of Tor remotely by overflowing on the heap. Remote-code execution
30068 hasn't been confirmed, but can't be ruled out. Everyone should
30069 upgrade. Bugfix on the 0.1.1 series and later.
30071 o Directory authority changes:
30072 - Change IP address and ports for gabelmoo (v3 directory authority).
30075 - Update to the December 1 2010 Maxmind GeoLite Country database.
30078 Changes in version 0.2.1.27 - 2010-11-23
30079 Yet another OpenSSL security patch broke its compatibility with Tor:
30080 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
30081 also took this opportunity to fix several crash bugs, integrate a new
30082 directory authority, and update the bundled GeoIP database.
30085 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
30086 No longer set the tlsext_host_name extension on server SSL objects;
30087 but continue to set it on client SSL objects. Our goal in setting
30088 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
30089 bugfix on 0.2.1.1-alpha.
30090 - Do not log messages to the controller while shrinking buffer
30091 freelists. Doing so would sometimes make the controller connection
30092 try to allocate a buffer chunk, which would mess up the internals
30093 of the freelist and cause an assertion failure. Fixes bug 1125;
30094 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
30095 - Learn our external IP address when we're a relay or bridge, even if
30096 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
30097 where we introduced bridge relays that don't need to publish to
30098 be useful. Fixes bug 2050.
30099 - Do even more to reject (and not just ignore) annotations on
30100 router descriptors received anywhere but from the cache. Previously
30101 we would ignore such annotations at first, but cache them to disk
30102 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
30103 - When you're using bridges and your network goes away and your
30104 bridges get marked as down, recover when you attempt a new socks
30105 connection (if the network is back), rather than waiting up to an
30106 hour to try fetching new descriptors for your bridges. Bugfix on
30107 0.2.0.3-alpha; fixes bug 1981.
30110 - Move to the November 2010 Maxmind GeoLite country db (rather
30111 than the June 2009 ip-to-country GeoIP db) for our statistics that
30112 count how many users relays are seeing from each country. Now we'll
30113 have more accurate data, especially for many African countries.
30115 o New directory authorities:
30116 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
30120 - Fix an assertion failure that could occur in directory caches or
30121 bridge users when using a very short voting interval on a testing
30122 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
30124 - Enforce multiplicity rules when parsing annotations. Bugfix on
30125 0.2.0.8-alpha. Found by piebeer.
30126 - Allow handshaking OR connections to take a full KeepalivePeriod
30127 seconds to handshake. Previously, we would close them after
30128 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
30129 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
30131 - When building with --enable-gcc-warnings on OpenBSD, disable
30132 warnings in system headers. This makes --enable-gcc-warnings
30133 pass on OpenBSD 4.8.
30136 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
30137 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
30138 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
30139 Servers can start sending this code when enough clients recognize
30140 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
30141 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
30142 Patch from mingw-san.
30145 - Remove the old debian/ directory from the main Tor distribution.
30146 The official Tor-for-debian git repository lives at the URL
30147 https://git.torproject.org/debian/tor.git
30148 - Stop shipping the old doc/website/ directory in the tarball. We
30149 changed the website format in late 2010, and what we shipped in
30150 0.2.1.26 really wasn't that useful anyway.
30153 Changes in version 0.2.2.19-alpha - 2010-11-22
30154 Yet another OpenSSL security patch broke its compatibility with Tor:
30155 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
30158 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
30159 No longer set the tlsext_host_name extension on server SSL objects;
30160 but continue to set it on client SSL objects. Our goal in setting
30161 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
30162 bugfix on 0.2.1.1-alpha.
30165 - Try harder not to exceed the maximum length of 50 KB when writing
30166 statistics to extra-info descriptors. This bug was triggered by very
30167 fast relays reporting exit-port, entry, and dirreq statistics.
30168 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
30169 - Publish a router descriptor even if generating an extra-info
30170 descriptor fails. Previously we would not publish a router
30171 descriptor without an extra-info descriptor; this can cause fast
30172 exit relays collecting exit-port statistics to drop from the
30173 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
30176 Changes in version 0.2.2.18-alpha - 2010-11-16
30177 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
30178 us lately, makes unpublished bridge relays able to detect their IP
30179 address, and fixes a wide variety of other bugs to get us much closer
30180 to a stable release.
30183 - Do even more to reject (and not just ignore) annotations on
30184 router descriptors received anywhere but from the cache. Previously
30185 we would ignore such annotations at first, but cache them to disk
30186 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
30187 - Do not log messages to the controller while shrinking buffer
30188 freelists. Doing so would sometimes make the controller connection
30189 try to allocate a buffer chunk, which would mess up the internals
30190 of the freelist and cause an assertion failure. Fixes bug 1125;
30191 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
30192 - Learn our external IP address when we're a relay or bridge, even if
30193 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
30194 where we introduced bridge relays that don't need to publish to
30195 be useful. Fixes bug 2050.
30196 - Maintain separate TLS contexts and certificates for incoming and
30197 outgoing connections in bridge relays. Previously we would use the
30198 same TLS contexts and certs for incoming and outgoing connections.
30199 Bugfix on 0.2.0.3-alpha; addresses bug 988.
30200 - Maintain separate identity keys for incoming and outgoing TLS
30201 contexts in bridge relays. Previously we would use the same
30202 identity keys for incoming and outgoing TLS contexts. Bugfix on
30203 0.2.0.3-alpha; addresses the other half of bug 988.
30204 - Avoid an assertion failure when we as an authority receive a
30205 duplicate upload of a router descriptor that we already have,
30206 but which we previously considered an obsolete descriptor.
30207 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
30208 - Avoid a crash bug triggered by looking at a dangling pointer while
30209 setting the network status consensus. Found by Robert Ransom.
30210 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
30211 - Fix a logic error where servers that _didn't_ act as exits would
30212 try to keep their server lists more aggressively up to date than
30213 exits, when it was supposed to be the other way around. Bugfix
30216 o Minor bugfixes (on Tor 0.2.1.x and earlier):
30217 - When we're trying to guess whether we know our IP address as
30218 a relay, we would log various ways that we failed to guess
30219 our address, but never log that we ended up guessing it
30220 successfully. Now add a log line to help confused and anxious
30221 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
30222 - Bring the logic that gathers routerinfos and assesses the
30223 acceptability of circuits into line. This prevents a Tor OP from
30224 getting locked in a cycle of choosing its local OR as an exit for a
30225 path (due to a .exit request) and then rejecting the circuit because
30226 its OR is not listed yet. It also prevents Tor clients from using an
30227 OR running in the same instance as an exit (due to a .exit request)
30228 if the OR does not meet the same requirements expected of an OR
30229 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
30230 - Correctly describe errors that occur when generating a TLS object.
30231 Previously we would attribute them to a failure while generating a
30232 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
30234 - Enforce multiplicity rules when parsing annotations. Bugfix on
30235 0.2.0.8-alpha. Found by piebeer.
30236 - Fix warnings that newer versions of autoconf produced during
30237 ./autogen.sh. These warnings appear to be harmless in our case,
30238 but they were extremely verbose. Fixes bug 2020.
30240 o Minor bugfixes (on Tor 0.2.2.x):
30241 - Enable protection of small arrays whenever we build with gcc
30242 hardening features, not only when also building with warnings
30243 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
30246 - Make hidden services work better in private Tor networks by not
30247 requiring any uptime to join the hidden service descriptor
30248 DHT. Implements ticket 2088.
30249 - Rate-limit the "your application is giving Tor only an IP address"
30250 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
30251 - When AllowSingleHopExits is set, print a warning to explain to the
30252 relay operator why most clients are avoiding her relay.
30253 - Update to the November 1 2010 Maxmind GeoLite Country database.
30255 o Code simplifications and refactoring:
30256 - When we fixed bug 1038 we had to put in a restriction not to send
30257 RELAY_EARLY cells on rend circuits. This was necessary as long
30258 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
30259 active. Now remove this obsolete check. Resolves bug 2081.
30260 - Some options used different conventions for uppercasing of acronyms
30261 when comparing manpage and source. Fix those in favor of the
30262 manpage, as it makes sense to capitalize acronyms.
30263 - Remove the torrc.complete file. It hasn't been kept up to date
30264 and users will have better luck checking out the manpage.
30265 - Remove the obsolete "NoPublish" option; it has been flagged
30266 as obsolete and has produced a warning since 0.1.1.18-rc.
30267 - Remove everything related to building the expert bundle for OS X.
30268 It has confused many users, doesn't work right on OS X 10.6,
30269 and is hard to get rid of once installed. Resolves bug 1274.
30272 Changes in version 0.2.2.17-alpha - 2010-09-30
30273 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
30274 to use one-hop circuits (which can put the exit relays at higher risk,
30275 plus unbalance the network); fixes a big bug in bandwidth accounting
30276 for relays that want to limit their monthly bandwidth use; fixes a
30277 big pile of bugs in how clients tolerate temporary network failure;
30278 and makes our adaptive circuit build timeout feature (which improves
30279 client performance if your network is fast while not breaking things
30280 if your network is slow) better handle bad networks.
30283 - Exit relays now try harder to block exit attempts from unknown
30284 relays, to make it harder for people to use them as one-hop proxies
30285 a la tortunnel. Controlled by the refuseunknownexits consensus
30286 parameter (currently enabled), or you can override it on your
30287 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
30289 o Major bugfixes (0.2.1.x and earlier):
30290 - Fix a bug in bandwidth accounting that could make us use twice
30291 the intended bandwidth when our interval start changes due to
30292 daylight saving time. Now we tolerate skew in stored vs computed
30293 interval starts: if the start of the period changes by no more than
30294 50% of the period's duration, we remember bytes that we transferred
30295 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
30296 - Always search the Windows system directory for system DLLs, and
30297 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
30298 - When you're using bridges and your network goes away and your
30299 bridges get marked as down, recover when you attempt a new socks
30300 connection (if the network is back), rather than waiting up to an
30301 hour to try fetching new descriptors for your bridges. Bugfix on
30302 0.2.0.3-alpha; fixes bug 1981.
30304 o Major bugfixes (on 0.2.2.x):
30305 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
30307 - Fix a segfault that could happen when operating a bridge relay with
30308 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
30309 - The consensus bandwidth-weights (used by clients to choose fast
30310 relays) entered an unexpected edge case in September where
30311 Exits were much scarcer than Guards, resulting in bad weight
30312 recommendations. Now we compute them using new constraints that
30313 should succeed in all cases. Also alter directory authorities to
30314 not include the bandwidth-weights line if they fail to produce
30315 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
30316 - When weighting bridges during path selection, we used to trust
30317 the bandwidths they provided in their descriptor, only capping them
30318 at 10MB/s. This turned out to be problematic for two reasons:
30319 Bridges could claim to handle a lot more traffic then they
30320 actually would, thus making more clients pick them and have a
30321 pretty effective DoS attack. The other issue is that new bridges
30322 that might not have a good estimate for their bw capacity yet
30323 would not get used at all unless no other bridges are available
30324 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
30326 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
30327 - Ignore cannibalized circuits when recording circuit build times.
30328 This should provide for a minor performance improvement for hidden
30329 service users using 0.2.2.14-alpha, and should remove two spurious
30330 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
30331 - Simplify the logic that causes us to decide if the network is
30332 unavailable for purposes of recording circuit build times. If we
30333 receive no cells whatsoever for the entire duration of a circuit's
30334 full measured lifetime, the network is probably down. Also ignore
30335 one-hop directory fetching circuit timeouts when calculating our
30336 circuit build times. These changes should hopefully reduce the
30337 cases where we see ridiculous circuit build timeouts for people
30338 with spotty wireless connections. Fixes part of bug 1772; bugfix
30340 - Prevent the circuit build timeout from becoming larger than
30341 the maximum build time we have ever seen. Also, prevent the time
30342 period for measurement circuits from becoming larger than twice that
30343 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
30346 - When we run out of directory information such that we can't build
30347 circuits, but then get enough that we can build circuits, log when
30348 we actually construct a circuit, so the user has a better chance of
30349 knowing what's going on. Fixes bug 1362.
30350 - Be more generous with how much bandwidth we'd use up (with
30351 accounting enabled) before entering "soft hibernation". Previously,
30352 we'd refuse new connections and circuits once we'd used up 95% of
30353 our allotment. Now, we use up 95% of our allotment, AND make sure
30354 that we have no more than 500MB (or 3 hours of expected traffic,
30355 whichever is lower) remaining before we enter soft hibernation.
30356 - If we've configured EntryNodes and our network goes away and/or all
30357 our entrynodes get marked down, optimistically retry them all when
30358 a new socks application request appears. Fixes bug 1882.
30359 - Add some more defensive programming for architectures that can't
30360 handle unaligned integer accesses. We don't know of any actual bugs
30361 right now, but that's the best time to fix them. Fixes bug 1943.
30362 - Support line continuations in the torrc config file. If a line
30363 ends with a single backslash character, the newline is ignored, and
30364 the configuration value is treated as continuing on the next line.
30367 o Minor bugfixes (on 0.2.1.x and earlier):
30368 - For bandwidth accounting, calculate our expected bandwidth rate
30369 based on the time during which we were active and not in
30370 soft-hibernation during the last interval. Previously, we were
30371 also considering the time spent in soft-hibernation. If this
30372 was a long time, we would wind up underestimating our bandwidth
30373 by a lot, and skewing our wakeup time towards the start of the
30374 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
30376 o Minor bugfixes (on 0.2.2.x):
30377 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
30378 which were disabled by the circuit build timeout changes in
30379 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
30380 - Make sure we don't warn about missing bandwidth weights when
30381 choosing bridges or other relays not in the consensus. Bugfix on
30382 0.2.2.10-alpha; fixes bug 1805.
30383 - In our logs, do not double-report signatures from unrecognized
30384 authorities both as "from unknown authority" and "not
30385 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
30388 Changes in version 0.2.2.16-alpha - 2010-09-17
30389 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
30390 evident at exit relays), and also continues to resolve all the little
30391 bugs that have been filling up trac lately.
30393 o Major bugfixes (stream-level fairness):
30394 - When receiving a circuit-level SENDME for a blocked circuit, try
30395 to package cells fairly from all the streams that had previously
30396 been blocked on that circuit. Previously, we had started with the
30397 oldest stream, and allowed each stream to potentially exhaust
30398 the circuit's package window. This gave older streams on any
30399 given circuit priority over newer ones. Fixes bug 1937. Detected
30400 originally by Camilo Viecco. This bug was introduced before the
30401 first Tor release, in svn commit r152: it is the new winner of
30402 the longest-lived bug prize.
30403 - When the exit relay got a circuit-level sendme cell, it started
30404 reading on the exit streams, even if had 500 cells queued in the
30405 circuit queue already, so the circuit queue just grew and grew in
30406 some cases. We fix this by not re-enabling reading on receipt of a
30407 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
30408 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
30410 - Newly created streams were allowed to read cells onto circuits,
30411 even if the circuit's cell queue was blocked and waiting to drain.
30412 This created potential unfairness, as older streams would be
30413 blocked, but newer streams would gladly fill the queue completely.
30414 We add code to detect this situation and prevent any stream from
30415 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
30419 - Update to the September 1 2010 Maxmind GeoLite Country database.
30420 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
30421 not. This would lead to a cookie that is still not group readable.
30422 Closes bug 1843. Suggested by katmagic.
30423 - When logging a rate-limited warning, we now mention how many messages
30424 got suppressed since the last warning.
30425 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
30426 do individual connection-level rate limiting of clients. The torrc
30427 config options with the same names trump the consensus params, if
30428 both are present. Replaces the old "bwconnrate" and "bwconnburst"
30429 consensus params which were broken from 0.2.2.7-alpha through
30430 0.2.2.14-alpha. Closes bug 1947.
30431 - When a router changes IP address or port, authorities now launch
30432 a new reachability test for it. Implements ticket 1899.
30433 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
30434 2 no signature, 4 required" messages about consensus signatures
30435 easier to read, and make sure they get logged at the same severity
30436 as the messages explaining which keys are which. Fixes bug 1290.
30437 - Don't warn when we have a consensus that we can't verify because
30438 of missing certificates, unless those certificates are ones
30439 that we have been trying and failing to download. Fixes bug 1145.
30440 - If you configure your bridge with a known identity fingerprint,
30441 and the bridge authority is unreachable (as it is in at least
30442 one country now), fall back to directly requesting the descriptor
30443 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
30445 - When building with --enable-gcc-warnings on OpenBSD, disable
30446 warnings in system headers. This makes --enable-gcc-warnings
30447 pass on OpenBSD 4.8.
30449 o Minor bugfixes (on 0.2.1.x and earlier):
30450 - Authorities will now attempt to download consensuses if their
30451 own efforts to make a live consensus have failed. This change
30452 means authorities that restart will fetch a valid consensus, and
30453 it means authorities that didn't agree with the current consensus
30454 will still fetch and serve it if it has enough signatures. Bugfix
30455 on 0.2.0.9-alpha; fixes bug 1300.
30456 - Ensure DNS requests launched by "RESOLVE" commands from the
30457 controller respect the __LeaveStreamsUnattached setconf options. The
30458 same goes for requests launched via DNSPort or transparent
30459 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
30460 - Allow handshaking OR connections to take a full KeepalivePeriod
30461 seconds to handshake. Previously, we would close them after
30462 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
30463 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
30465 - Rate-limit "Failed to hand off onionskin" warnings.
30466 - Never relay a cell for a circuit we have already destroyed.
30467 Between marking a circuit as closeable and finally closing it,
30468 it may have been possible for a few queued cells to get relayed,
30469 even though they would have been immediately dropped by the next
30470 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
30471 - Never queue a cell for a circuit that's already been marked
30473 - Never vote for a server as "Running" if we have a descriptor for
30474 it claiming to be hibernating, and that descriptor was published
30475 more recently than our last contact with the server. Bugfix on
30476 0.2.0.3-alpha; fixes bug 911.
30477 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
30480 o Minor bugfixes (on 0.2.2.x):
30481 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
30482 down if a directory fetch fails and you've configured either
30483 bridges or EntryNodes. The intent was to mark the relay as down
30484 _unless_ you're using bridges or EntryNodes, since if you are
30485 then you could quickly run out of entry points.
30486 - Fix the Windows directory-listing code. A bug introduced in
30487 0.2.2.14-alpha could make Windows directory servers forget to load
30488 some of their cached v2 networkstatus files.
30489 - Really allow clients to use relays as bridges. Fixes bug 1776;
30490 bugfix on 0.2.2.15-alpha.
30491 - Demote a warn to info that happens when the CellStatistics option
30492 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
30493 Reported by Moritz Bartl.
30494 - On Windows, build correctly either with or without Unicode support.
30495 This is necessary so that Tor can support fringe platforms like
30496 Windows 98 (which has no Unicode), or Windows CE (which has no
30497 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
30500 - Add a unit test for cross-platform directory-listing code.
30503 Changes in version 0.2.2.15-alpha - 2010-08-18
30504 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
30505 fixes a variety of other bugs that were preventing performance
30506 experiments from moving forward, fixes several bothersome memory leaks,
30507 and generally closes a lot of smaller bugs that have been filling up
30511 - Stop assigning the HSDir flag to relays that disable their
30512 DirPort (and thus will refuse to answer directory requests). This
30513 fix should dramatically improve the reachability of hidden services:
30514 hidden services and hidden service clients pick six HSDir relays
30515 to store and retrieve the hidden service descriptor, and currently
30516 about half of the HSDir relays will refuse to work. Bugfix on
30517 0.2.0.10-alpha; fixes part of bug 1693.
30518 - The PerConnBWRate and Burst config options, along with the
30519 bwconnrate and bwconnburst consensus params, initialized each conn's
30520 token bucket values only when the connection is established. Now we
30521 update them if the config options change, and update them every time
30522 we get a new consensus. Otherwise we can encounter an ugly edge
30523 case where we initialize an OR conn to client-level bandwidth,
30524 but then later the relay joins the consensus and we leave it
30525 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
30526 - Fix a regression that caused Tor to rebind its ports if it receives
30527 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
30530 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
30531 should give us approximately 40-50% more Guard-flagged nodes,
30532 improving the anonymity the Tor network can provide and also
30533 decreasing the dropoff in throughput that relays experience when
30534 they first get the Guard flag.
30535 - Allow enabling or disabling the *Statistics config options while
30539 - Update to the August 1 2010 Maxmind GeoLite Country database.
30540 - Have the controller interface give a more useful message than
30541 "Internal Error" in response to failed GETINFO requests.
30542 - Warn when the same option is provided more than once in a torrc
30543 file, on the command line, or in a single SETCONF statement, and
30544 the option is one that only accepts a single line. Closes bug 1384.
30545 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
30546 Patch from mingw-san.
30547 - Add support for the country code "{??}" in torrc options like
30548 ExcludeNodes, to indicate all routers of unknown country. Closes
30550 - Relays report the number of bytes spent on answering directory
30551 requests in extra-info descriptors similar to {read,write}-history.
30552 Implements enhancement 1790.
30554 o Minor bugfixes (on 0.2.1.x and earlier):
30555 - Complain if PublishServerDescriptor is given multiple arguments that
30556 include 0 or 1. This configuration will be rejected in the future.
30557 Bugfix on 0.2.0.1-alpha; closes bug 1107.
30558 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
30559 Bugfix on 0.2.0.13-alpha; closes bug 928.
30560 - Change "Application request when we're believed to be offline."
30561 notice to "Application request when we haven't used client
30562 functionality lately.", to clarify that it's not an error. Bugfix
30563 on 0.0.9.3; fixes bug 1222.
30564 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
30565 would return "551 Internal error" rather than "552 Unrecognized key
30566 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
30567 - Users can't configure a regular relay to be their bridge. It didn't
30568 work because when Tor fetched the bridge descriptor, it found
30569 that it already had it, and didn't realize that the purpose of the
30570 descriptor had changed. Now we replace routers with a purpose other
30571 than bridge with bridge descriptors when fetching them. Bugfix on
30572 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
30573 refetch the descriptor with router purpose 'general', disabling
30575 - Fix a rare bug in rend_fn unit tests: we would fail a test when
30576 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
30577 on 0.2.0.10-alpha; fixes bug 1808.
30578 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
30579 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
30580 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
30581 Servers can start sending this code when enough clients recognize
30582 it. Also update the spec to reflect this new reason. Bugfix on
30583 0.1.0.1-rc; fixes part of bug 1793.
30584 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
30585 when we switch from being a public relay to a bridge. Otherwise
30586 there will still be clients that see the relay in their consensus,
30587 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
30589 - Instead of giving an assertion failure on an internal mismatch
30590 on estimated freelist size, just log a BUG warning and try later.
30591 Mitigates but does not fix bug 1125.
30592 - Fix an assertion failure that could occur in caches or bridge users
30593 when using a very short voting interval on a testing network.
30594 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
30596 o Minor bugfixes (on 0.2.2.x):
30597 - Alter directory authorities to always consider Exit-flagged nodes
30598 as potential Guard nodes in their votes. The actual decision to
30599 use Exits as Guards is done in the consensus bandwidth weights.
30600 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
30601 - When the controller is reporting the purpose of circuits that
30602 didn't finish building before the circuit build timeout, it was
30603 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
30604 - Our libevent version parsing code couldn't handle versions like
30605 1.4.14b-stable and incorrectly warned the user about using an
30606 old and broken version of libevent. Treat 1.4.14b-stable like
30607 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
30609 - Don't use substitution references like $(VAR:MOD) when
30610 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
30611 '$(:x)' to 'x' rather than the empty string. This bites us in
30612 doc/ when configured with --disable-asciidoc. Bugfix on
30613 0.2.2.9-alpha; fixes bug 1773.
30614 - Remove a spurious hidden service server-side log notice about
30615 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
30617 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
30619 - Correctly report written bytes on linked connections. Found while
30620 implementing 1790. Bugfix on 0.2.2.4-alpha.
30621 - Fix three memory leaks: one in circuit_build_times_parse_state(),
30622 one in dirvote_add_signatures_to_pending_consensus(), and one every
30623 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
30624 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
30626 o Code simplifications and refactoring:
30627 - Take a first step towards making or.h smaller by splitting out
30628 function definitions for all source files in src/or/. Leave
30629 structures and defines in or.h for now.
30630 - Remove a bunch of unused function declarations as well as a block of
30631 #if 0'd code from the unit tests. Closes bug 1824.
30632 - New unit tests for exit-port history statistics; refactored exit
30633 statistics code to be more easily tested.
30634 - Remove the old debian/ directory from the main Tor distribution.
30635 The official Tor-for-debian git repository lives at the URL
30636 https://git.torproject.org/debian/tor.git
30639 Changes in version 0.2.2.14-alpha - 2010-07-12
30640 Tor 0.2.2.14-alpha greatly improves client-side handling of
30641 circuit build timeouts, which are used to estimate speed and improve
30642 performance. We also move to a much better GeoIP database, port Tor to
30643 Windows CE, introduce new compile flags that improve code security,
30644 add an eighth v3 directory authority, and address a lot of more
30648 - Tor directory authorities no longer crash when started with a
30649 cached-microdesc-consensus file in their data directory. Bugfix
30650 on 0.2.2.6-alpha; fixes bug 1532.
30651 - Treat an unset $HOME like an empty $HOME rather than triggering an
30652 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
30653 - Ignore negative and large circuit build timeout values that can
30654 happen during a suspend or hibernate. These values caused various
30655 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
30656 - Alter calculation of Pareto distribution parameter 'Xm' for
30657 Circuit Build Timeout learning to use the weighted average of the
30658 top N=3 modes (because we have three entry guards). Considering
30659 multiple modes should improve the timeout calculation in some cases,
30660 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
30662 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
30663 right censored distribution model. This approach improves over the
30664 synthetic timeout generation approach that was producing insanely
30665 high timeout values. Now we calculate build timeouts using truncated
30666 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
30667 - Do not close circuits that are under construction when they reach
30668 the circuit build timeout. Instead, leave them building (but do not
30669 use them) for up until the time corresponding to the 95th percentile
30670 on the Pareto CDF or 60 seconds, whichever is greater. This is done
30671 to provide better data for the new Pareto model. This percentile
30672 can be controlled by the consensus.
30675 - Move to the June 2010 Maxmind GeoLite country db (rather than the
30676 June 2009 ip-to-country GeoIP db) for our statistics that count
30677 how many users relays are seeing from each country. Now we have
30678 more accurate data for many African countries.
30679 - Port Tor to build and run correctly on Windows CE systems, using
30680 the wcecompat library. Contributed by Valerio Lupi.
30681 - New "--enable-gcc-hardening" ./configure flag (off by default)
30682 to turn on gcc compile time hardening options. It ensures
30683 that signed ints have defined behavior (-fwrapv), enables
30684 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
30685 with canaries (-fstack-protector-all), turns on ASLR protection if
30686 supported by the kernel (-fPIE, -pie), and adds additional security
30687 related warnings. Verified to work on Mac OS X and Debian Lenny.
30688 - New "--enable-linker-hardening" ./configure flag (off by default)
30689 to turn on ELF specific hardening features (relro, now). This does
30690 not work with Mac OS X or any other non-ELF binary format.
30692 o New directory authorities:
30693 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
30697 - New config option "WarnUnsafeSocks 0" disables the warning that
30698 occurs whenever Tor receives a socks handshake using a version of
30699 the socks protocol that can only provide an IP address (rather
30700 than a hostname). Setups that do DNS locally over Tor are fine,
30701 and we shouldn't spam the logs in that case.
30702 - Convert the HACKING file to asciidoc, and add a few new sections
30703 to it, explaining how we use Git, how we make changelogs, and
30704 what should go in a patch.
30705 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
30706 event, to give information on the current rate of circuit timeouts
30707 over our stored history.
30708 - Add ability to disable circuit build time learning via consensus
30709 parameter and via a LearnCircuitBuildTimeout config option. Also
30710 automatically disable circuit build time calculation if we are
30711 either a AuthoritativeDirectory, or if we fail to write our state
30712 file. Fixes bug 1296.
30713 - More gracefully handle corrupt state files, removing asserts
30714 in favor of saving a backup and resetting state.
30715 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
30719 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
30721 - When a2x fails, mention that the user could disable manpages instead
30722 of trying to fix their asciidoc installation.
30723 - Where available, use Libevent 2.0's periodic timers so that our
30724 once-per-second cleanup code gets called even more closely to
30725 once per second than it would otherwise. Fixes bug 943.
30726 - If you run a bridge that listens on multiple IP addresses, and
30727 some user configures a bridge address that uses a different IP
30728 address than your bridge writes in its router descriptor, and the
30729 user doesn't specify an identity key, their Tor would discard the
30730 descriptor because "it isn't one of our configured bridges", and
30731 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
30732 Bugfix on 0.2.0.3-alpha.
30733 - If OpenSSL fails to make a duplicate of a private or public key, log
30734 an error message and try to exit cleanly. May help with debugging
30735 if bug 1209 ever remanifests.
30736 - Save a couple bytes in memory allocation every time we escape
30737 certain characters in a string. Patch from Florian Zumbiehl.
30738 - Make it explicit that we don't cannibalize one-hop circuits. This
30739 happens in the wild, but doesn't turn out to be a problem because
30740 we fortunately don't use those circuits. Many thanks to outofwords
30741 for the initial analysis and to swissknife who confirmed that
30742 two-hop circuits are actually created.
30743 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
30744 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
30745 - Eliminate a case where a circuit build time warning was displayed
30746 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
30749 Changes in version 0.2.1.26 - 2010-05-02
30750 Tor 0.2.1.26 addresses the recent connection and memory overload
30751 problems we've been seeing on relays, especially relays with their
30752 DirPort open. If your relay has been crashing, or you turned it off
30753 because it used too many resources, give this release a try.
30755 This release also fixes yet another instance of broken OpenSSL libraries
30756 that was causing some relays to drop out of the consensus.
30759 - Teach relays to defend themselves from connection overload. Relays
30760 now close idle circuits early if it looks like they were intended
30761 for directory fetches. Relays are also more aggressive about closing
30762 TLS connections that have no circuits on them. Such circuits are
30763 unlikely to be re-used, and tens of thousands of them were piling
30764 up at the fast relays, causing the relays to run out of sockets
30765 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30766 their directory fetches over TLS).
30767 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30768 that claim to be earlier than 0.9.8m, but which have in reality
30769 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30770 behavior. Possible fix for some cases of bug 1346.
30771 - Directory mirrors were fetching relay descriptors only from v2
30772 directory authorities, rather than v3 authorities like they should.
30773 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30774 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30777 - Finally get rid of the deprecated and now harmful notion of "clique
30778 mode", where directory authorities maintain TLS connections to
30782 - In the util/threads test, no longer free the test_mutex before all
30783 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30784 - The master thread could starve the worker threads quite badly on
30785 certain systems, causing them to run only partially in the allowed
30786 window. This resulted in test failures. Now the master thread sleeps
30787 occasionally for a few microseconds while the two worker-threads
30788 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30791 Changes in version 0.2.2.13-alpha - 2010-04-24
30792 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
30793 problems we've been seeing on relays, especially relays with their
30794 DirPort open. If your relay has been crashing, or you turned it off
30795 because it used too many resources, give this release a try.
30798 - Teach relays to defend themselves from connection overload. Relays
30799 now close idle circuits early if it looks like they were intended
30800 for directory fetches. Relays are also more aggressive about closing
30801 TLS connections that have no circuits on them. Such circuits are
30802 unlikely to be re-used, and tens of thousands of them were piling
30803 up at the fast relays, causing the relays to run out of sockets
30804 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30805 their directory fetches over TLS).
30808 - Finally get rid of the deprecated and now harmful notion of "clique
30809 mode", where directory authorities maintain TLS connections to
30811 - Directory authorities now do an immediate reachability check as soon
30812 as they hear about a new relay. This change should slightly reduce
30813 the time between setting up a relay and getting listed as running
30814 in the consensus. It should also improve the time between setting
30815 up a bridge and seeing use by bridge users.
30816 - Directory authorities no longer launch a TLS connection to every
30817 relay as they startup. Now that we have 2k+ descriptors cached,
30818 the resulting network hiccup is becoming a burden. Besides,
30819 authorities already avoid voting about Running for the first half
30820 hour of their uptime.
30823 Changes in version 0.2.2.12-alpha - 2010-04-20
30824 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
30825 handle and vote on descriptors. It was causing relays to drop out of
30829 - Many relays have been falling out of the consensus lately because
30830 not enough authorities know about their descriptor for them to get
30831 a majority of votes. When we deprecated the v2 directory protocol,
30832 we got rid of the only way that v3 authorities can hear from each
30833 other about other descriptors. Now authorities examine every v3
30834 vote for new descriptors, and fetch them from that authority. Bugfix
30836 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
30837 and a warning in or.h related to bandwidth_weight_rule_t that
30838 prevented clean compile on OS X. Fixes bug 1363; bugfix on
30840 - Fix a segfault on relays when DirReqStatistics is enabled
30841 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
30845 - Demote a confusing TLS warning that relay operators might get when
30846 someone tries to talk to their OrPort. It is neither the operator's
30847 fault nor can they do anything about it. Fixes bug 1364; bugfix
30851 Changes in version 0.2.2.11-alpha - 2010-04-15
30852 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
30853 libraries that was causing some relays to drop out of the consensus.
30856 - Directory mirrors were fetching relay descriptors only from v2
30857 directory authorities, rather than v3 authorities like they should.
30858 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30859 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30860 - Fix a parsing error that made every possible value of
30861 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
30862 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
30863 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
30864 about the option without breaking older ones.
30865 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30866 that claim to be earlier than 0.9.8m, but which have in reality
30867 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30868 behavior. Possible fix for some cases of bug 1346.
30871 - Experiment with a more aggressive approach to preventing clients
30872 from making one-hop exit streams. Exit relays who want to try it
30873 out can set "RefuseUnknownExits 1" in their torrc, and then look
30874 for "Attempt by %s to open a stream" log messages. Let us know
30876 - Add support for statically linking zlib by specifying
30877 --enable-static-zlib, to go with our support for statically linking
30878 openssl and libevent. Resolves bug 1358.
30881 - Fix a segfault that happens whenever a Tor client that is using
30882 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
30884 - When we cleaned up the contrib/tor-exit-notice.html file, we left
30885 out the first line. Fixes bug 1295.
30886 - When building the manpage from a tarball, we required asciidoc, but
30887 the asciidoc -> roff/html conversion was already done for the
30888 tarball. Make 'make' complain only when we need asciidoc (either
30889 because we're compiling directly from git, or because we altered
30890 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
30891 - When none of the directory authorities vote on any params, Tor
30892 segfaulted when trying to make the consensus from the votes. We
30893 didn't trigger the bug in practice, because authorities do include
30894 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
30897 - In the util/threads test, no longer free the test_mutex before all
30898 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30899 - The master thread could starve the worker threads quite badly on
30900 certain systems, causing them to run only partially in the allowed
30901 window. This resulted in test failures. Now the master thread sleeps
30902 occasionally for a few microseconds while the two worker-threads
30903 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30906 Changes in version 0.2.2.10-alpha - 2010-03-07
30907 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
30908 could prevent relays from guessing their IP address correctly. It also
30909 starts the groundwork for another client-side performance boost, since
30910 currently we're not making efficient use of relays that have both the
30911 Guard flag and the Exit flag.
30914 - Fix a regression from our patch for bug 1244 that caused relays
30915 to guess their IP address incorrectly if they didn't set Address
30916 in their torrc and/or their address fails to resolve. Bugfix on
30917 0.2.2.9-alpha; fixes bug 1269.
30919 o Major features (performance):
30920 - Directory authorities now compute consensus weightings that instruct
30921 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
30922 and no flag. Clients that use these weightings will distribute
30923 network load more evenly across these different relay types. The
30924 weightings are in the consensus so we can change them globally in
30925 the future. Extra thanks to "outofwords" for finding some nasty
30926 security bugs in the first implementation of this feature.
30928 o Minor features (performance):
30929 - Always perform router selections using weighted relay bandwidth,
30930 even if we don't need a high capacity circuit at the time. Non-fast
30931 circuits now only differ from fast ones in that they can use relays
30932 not marked with the Fast flag. This "feature" could turn out to
30933 be a horrible bug; we should investigate more before it goes into
30937 - Allow disabling building of the manpages. Skipping the manpage
30938 speeds up the build considerably.
30940 o Minor bugfixes (on 0.2.2.x):
30941 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
30942 Bugfix on 0.2.2.9-alpha.
30943 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
30944 config option. Bugfix on 0.2.2.7-alpha.
30945 - Ship the asciidoc-helper file in the tarball, so that people can
30946 build from source if they want to, and touching the .1.txt files
30947 doesn't break the build. Bugfix on 0.2.2.9-alpha.
30949 o Minor bugfixes (on 0.2.1.x or earlier):
30950 - Fix a dereference-then-NULL-check sequence when publishing
30951 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30953 - Fix another dereference-then-NULL-check sequence. Bugfix on
30954 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30955 - Make sure we treat potentially not NUL-terminated strings correctly.
30956 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30958 o Code simplifications and refactoring:
30959 - Fix some urls in the exit notice file and make it XHTML1.1 strict
30960 compliant. Based on a patch from Christian Kujau.
30961 - Don't use sed in asciidoc-helper anymore.
30962 - Make the build process fail if asciidoc cannot be found and
30963 building with asciidoc isn't disabled.
30966 Changes in version 0.2.2.9-alpha - 2010-02-22
30967 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
30968 location of a directory authority, and cleans up a bunch of small bugs.
30970 o Directory authority changes:
30971 - Change IP address for dannenberg (v3 directory authority), and
30972 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30973 service directory authority) from the list.
30976 - Make Tor work again on the latest OS X: when deciding whether to
30977 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30978 version at run-time, not compile time. We need to do this because
30979 Apple doesn't update its dev-tools headers when it updates its
30980 libraries in a security patch.
30981 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30982 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30983 a memory leak when requesting a hidden service descriptor we've
30984 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30986 - Authorities could be tricked into giving out the Exit flag to relays
30987 that didn't allow exiting to any ports. This bug could screw
30988 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
30989 1238. Bug discovered by Martin Kowalczyk.
30990 - When freeing a session key, zero it out completely. We only zeroed
30991 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30992 patched by ekir. Fixes bug 1254.
30995 - Fix static compilation by listing the openssl libraries in the right
30996 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
30997 - Resume handling .exit hostnames in a special way: originally we
30998 stripped the .exit part and used the requested exit relay. In
30999 0.2.2.1-alpha we stopped treating them in any special way, meaning
31000 if you use a .exit address then Tor will pass it on to the exit
31001 relay. Now we reject the .exit stream outright, since that behavior
31002 might be more expected by the user. Found and diagnosed by Scott
31003 Bennett and Downie on or-talk.
31004 - Don't spam the controller with events when we have no file
31005 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
31006 for log messages was already solved from bug 748.)
31007 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
31009 - Make the DNSPort option work with libevent 2.x. Don't alter the
31010 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
31011 - Emit a GUARD DROPPED controller event for a case we missed.
31012 - Make more fields in the controller protocol case-insensitive, since
31013 control-spec.txt said they were.
31014 - Refactor resolve_my_address() to not use gethostbyname() anymore.
31015 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
31016 - Fix a spec conformance issue: the network-status-version token
31017 must be the first token in a v3 consensus or vote. Discovered by
31018 parakeep. Bugfix on 0.2.0.3-alpha.
31020 o Code simplifications and refactoring:
31021 - Generate our manpage and HTML documentation using Asciidoc. This
31022 change should make it easier to maintain the documentation, and
31023 produce nicer HTML.
31024 - Remove the --enable-iphone option. According to reports from Marco
31025 Bonetti, Tor builds fine without any special tweaking on recent
31026 iPhone SDK versions.
31027 - Removed some unnecessary files from the source distribution. The
31028 AUTHORS file has now been merged into the people page on the
31029 website. The roadmaps and design doc can now be found in the
31030 projects directory in svn.
31031 - Enabled various circuit build timeout constants to be controlled
31032 by consensus parameters. Also set better defaults for these
31033 parameters based on experimentation on broadband and simulated
31034 high latency links.
31037 - The 'EXTENDCIRCUIT' control port command can now be used with
31038 a circ id of 0 and no path. This feature will cause Tor to build
31039 a new 'fast' general purpose circuit using its own path selection
31041 - Added a BUILDTIMEOUT_SET controller event to describe changes
31042 to the circuit build timeout.
31043 - Future-proof the controller protocol a bit by ignoring keyword
31044 arguments we do not recognize.
31045 - Expand homedirs passed to tor-checkkey. This should silence a
31046 coverity complaint about passing a user-supplied string into
31047 open() without checking it.
31050 Changes in version 0.2.1.25 - 2010-03-16
31051 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
31052 prevent relays from guessing their IP address correctly. It also fixes
31053 several minor potential security bugs.
31056 - Fix a regression from our patch for bug 1244 that caused relays
31057 to guess their IP address incorrectly if they didn't set Address
31058 in their torrc and/or their address fails to resolve. Bugfix on
31059 0.2.1.23; fixes bug 1269.
31060 - When freeing a session key, zero it out completely. We only zeroed
31061 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
31062 patched by ekir. Fixes bug 1254.
31065 - Fix a dereference-then-NULL-check sequence when publishing
31066 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
31068 - Fix another dereference-then-NULL-check sequence. Bugfix on
31069 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
31070 - Make sure we treat potentially not NUL-terminated strings correctly.
31071 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
31075 Changes in version 0.2.1.24 - 2010-02-21
31076 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
31080 - Work correctly out-of-the-box with even more vendor-patched versions
31081 of OpenSSL. In particular, make it so Debian and OS X don't need
31082 customized patches to run/build.
31085 Changes in version 0.2.1.23 - 2010-02-13
31086 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
31087 again on the latest OS X, and updates the location of a directory
31090 o Major bugfixes (performance):
31091 - We were selecting our guards uniformly at random, and then weighting
31092 which of our guards we'd use uniformly at random. This imbalance
31093 meant that Tor clients were severely limited on throughput (and
31094 probably latency too) by the first hop in their circuit. Now we
31095 select guards weighted by currently advertised bandwidth. We also
31096 automatically discard guards picked using the old algorithm. Fixes
31097 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
31100 - Make Tor work again on the latest OS X: when deciding whether to
31101 use strange flags to turn TLS renegotiation on, detect the OpenSSL
31102 version at run-time, not compile time. We need to do this because
31103 Apple doesn't update its dev-tools headers when it updates its
31104 libraries in a security patch.
31105 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
31106 that could happen on 32-bit platforms with 64-bit time_t. Also fix
31107 a memory leak when requesting a hidden service descriptor we've
31108 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
31111 o Directory authority changes:
31112 - Change IP address for dannenberg (v3 directory authority), and
31113 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
31114 service directory authority) from the list.
31117 - Refactor resolve_my_address() to not use gethostbyname() anymore.
31118 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
31121 - Avoid a mad rush at the beginning of each month when each client
31122 rotates half of its guards. Instead we spread the rotation out
31123 throughout the month, but we still avoid leaving a precise timestamp
31124 in the state file about when we first picked the guard. Improves
31125 over the behavior introduced in 0.1.2.17.
31128 Changes in version 0.2.2.8-alpha - 2010-01-26
31129 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
31130 causing bridge relays to disappear. If you're running a bridge,
31134 - Fix a memory corruption bug on bridges that occurred during the
31135 inclusion of stats data in extra-info descriptors. Also fix the
31136 interface for geoip_get_bridge_stats* to prevent similar bugs in
31137 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
31138 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
31141 - Ignore OutboundBindAddress when connecting to localhost.
31142 Connections to localhost need to come _from_ localhost, or else
31143 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
31147 Changes in version 0.2.2.7-alpha - 2010-01-19
31148 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
31149 as laying the groundwork for further relay-side performance fixes. It
31150 also starts cleaning up client behavior with respect to the EntryNodes,
31151 ExitNodes, and StrictNodes config options.
31153 This release also rotates two directory authority keys, due to a
31154 security breach of some of the Torproject servers.
31156 o Directory authority changes:
31157 - Rotate keys (both v3 identity and relay identity) for moria1
31160 o Major features (performance):
31161 - We were selecting our guards uniformly at random, and then weighting
31162 which of our guards we'd use uniformly at random. This imbalance
31163 meant that Tor clients were severely limited on throughput (and
31164 probably latency too) by the first hop in their circuit. Now we
31165 select guards weighted by currently advertised bandwidth. We also
31166 automatically discard guards picked using the old algorithm. Fixes
31167 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
31168 - When choosing which cells to relay first, relays can now favor
31169 circuits that have been quiet recently, to provide lower latency
31170 for low-volume circuits. By default, relays enable or disable this
31171 feature based on a setting in the consensus. You can override
31172 this default by using the new "CircuitPriorityHalflife" config
31173 option. Design and code by Ian Goldberg, Can Tang, and Chris
31175 - Add separate per-conn write limiting to go with the per-conn read
31176 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
31177 but never per-conn write limits.
31178 - New consensus params "bwconnrate" and "bwconnburst" to let us
31179 rate-limit client connections as they enter the network. It's
31180 controlled in the consensus so we can turn it on and off for
31181 experiments. It's starting out off. Based on proposal 163.
31183 o Major features (relay selection options):
31184 - Switch to a StrictNodes config option, rather than the previous
31185 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
31186 "StrictExcludeNodes" option.
31187 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
31188 change during a config reload, mark and discard all our origin
31189 circuits. This fix should address edge cases where we change the
31190 config options and but then choose a circuit that we created before
31192 - If EntryNodes or ExitNodes are set, be more willing to use an
31193 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
31195 - Make EntryNodes config option much more aggressive even when
31196 StrictNodes is not set. Before it would prepend your requested
31197 entrynodes to your list of guard nodes, but feel free to use others
31198 after that. Now it chooses only from your EntryNodes if any of
31199 those are available, and only falls back to others if a) they're
31200 all down and b) StrictNodes is not set.
31201 - Now we refresh your entry guards from EntryNodes at each consensus
31202 fetch -- rather than just at startup and then they slowly rot as
31203 the network changes.
31206 - Stop bridge directory authorities from answering dbg-stability.txt
31207 directory queries, which would let people fetch a list of all
31208 bridge identities they track. Bugfix on 0.2.1.6-alpha.
31211 - Log a notice when we get a new control connection. Now it's easier
31212 for security-conscious users to recognize when a local application
31213 is knocking on their controller door. Suggested by bug 1196.
31214 - New config option "CircuitStreamTimeout" to override our internal
31215 timeout schedule for how many seconds until we detach a stream from
31216 a circuit and try a new circuit. If your network is particularly
31217 slow, you might want to set this to a number like 60.
31218 - New controller command "getinfo config-text". It returns the
31219 contents that Tor would write if you send it a SAVECONF command,
31220 so the controller can write the file to disk itself.
31221 - New options for SafeLogging to allow scrubbing only log messages
31222 generated while acting as a relay.
31223 - Ship the bridges spec file in the tarball too.
31224 - Avoid a mad rush at the beginning of each month when each client
31225 rotates half of its guards. Instead we spread the rotation out
31226 throughout the month, but we still avoid leaving a precise timestamp
31227 in the state file about when we first picked the guard. Improves
31228 over the behavior introduced in 0.1.2.17.
31230 o Minor bugfixes (compiling):
31231 - Fix compilation on OS X 10.3, which has a stub mlockall() but
31232 hides it. Bugfix on 0.2.2.6-alpha.
31233 - Fix compilation on Solaris by removing support for the
31234 DisableAllSwap config option. Solaris doesn't have an rlimit for
31235 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
31238 o Minor bugfixes (crashes):
31239 - Do not segfault when writing buffer stats when we haven't observed
31240 a single circuit to report about. Found by Fabian Lanze. Bugfix on
31242 - If we're in the pathological case where there's no exit bandwidth
31243 but there is non-exit bandwidth, or no guard bandwidth but there
31244 is non-guard bandwidth, don't crash during path selection. Bugfix
31246 - Fix an impossible-to-actually-trigger buffer overflow in relay
31247 descriptor generation. Bugfix on 0.1.0.15.
31249 o Minor bugfixes (privacy):
31250 - Fix an instance where a Tor directory mirror might accidentally
31251 log the IP address of a misbehaving Tor client. Bugfix on
31253 - Don't list Windows capabilities in relay descriptors. We never made
31254 use of them, and maybe it's a bad idea to publish them. Bugfix
31257 o Minor bugfixes (other):
31258 - Resolve an edge case in path weighting that could make us misweight
31259 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
31260 - Fix statistics on client numbers by country as seen by bridges that
31261 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
31262 intervals instead of variable 12-to-48-hour intervals.
31263 - After we free an internal connection structure, overwrite it
31264 with a different memory value than we use for overwriting a freed
31265 internal circuit structure. Should help with debugging. Suggested
31267 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
31270 o Removed features:
31271 - Remove the HSAuthorityRecordStats option that version 0 hidden
31272 service authorities could have used to track statistics of overall
31273 hidden service usage.
31276 Changes in version 0.2.1.22 - 2010-01-19
31277 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
31278 authorities -- it would tell you its whole history of bridge descriptors
31279 if you make the right directory request. This stable update also
31280 rotates two of the seven v3 directory authority keys and locations.
31282 o Directory authority changes:
31283 - Rotate keys (both v3 identity and relay identity) for moria1
31287 - Stop bridge directory authorities from answering dbg-stability.txt
31288 directory queries, which would let people fetch a list of all
31289 bridge identities they track. Bugfix on 0.2.1.6-alpha.
31292 Changes in version 0.2.1.21 - 2009-12-21
31293 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
31294 library. If you use Tor on Linux / Unix and you're getting SSL
31295 renegotiation errors, upgrading should help. We also recommend an
31296 upgrade if you're an exit relay.
31299 - Work around a security feature in OpenSSL 0.9.8l that prevents our
31300 handshake from working unless we explicitly tell OpenSSL that we
31301 are using SSL renegotiation safely. We are, of course, but OpenSSL
31302 0.9.8l won't work unless we say we are.
31303 - Avoid crashing if the client is trying to upload many bytes and the
31304 circuit gets torn down at the same time, or if the flip side
31305 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
31308 - Do not refuse to learn about authority certs and v2 networkstatus
31309 documents that are older than the latest consensus. This bug might
31310 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
31311 Spotted and fixed by xmux.
31312 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
31313 trigger platform-specific option misparsing case found by Coverity
31315 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
31316 trigger assert. Fixes bug 1173.
31319 Changes in version 0.2.2.6-alpha - 2009-11-19
31320 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
31321 support for the new lower-footprint "microdescriptor" directory design,
31322 future-proofing our consensus format against new hash functions or
31323 other changes, and an Android port. It also makes Tor compatible with
31324 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
31327 - Directory authorities can now create, vote on, and serve multiple
31328 parallel formats of directory data as part of their voting process.
31329 Partially implements Proposal 162: "Publish the consensus in
31331 - Directory authorities can now agree on and publish small summaries
31332 of router information that clients can use in place of regular
31333 server descriptors. This transition will eventually allow clients
31334 to use far less bandwidth for downloading information about the
31335 network. Begins the implementation of Proposal 158: "Clients
31336 download consensus + microdescriptors".
31337 - The directory voting system is now extensible to use multiple hash
31338 algorithms for signatures and resource selection. Newer formats
31339 are signed with SHA256, with a possibility for moving to a better
31340 hash algorithm in the future.
31341 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
31342 current and future memory pages via mlockall(). On supported
31343 platforms (modern Linux and probably BSD but not Windows or OS X),
31344 this should effectively disable any and all attempts to page out
31345 memory. This option requires that you start your Tor as root --
31346 if you use DisableAllSwap, please consider using the User option
31347 to properly reduce the privileges of your Tor.
31348 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
31349 to help Tor build correctly for Android phones.
31352 - Work around a security feature in OpenSSL 0.9.8l that prevents our
31353 handshake from working unless we explicitly tell OpenSSL that we
31354 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
31355 won't work unless we say we are.
31358 - Fix a crash bug when trying to initialize the evdns module in
31359 Libevent 2. Bugfix on 0.2.1.16-rc.
31360 - Stop logging at severity 'warn' when some other Tor client tries
31361 to establish a circuit with us using weak DH keys. It's a protocol
31362 violation, but that doesn't mean ordinary users need to hear about
31363 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
31364 - Do not refuse to learn about authority certs and v2 networkstatus
31365 documents that are older than the latest consensus. This bug might
31366 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
31367 Spotted and fixed by xmux.
31368 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
31369 - If all authorities restart at once right before a consensus vote,
31370 nobody will vote about "Running", and clients will get a consensus
31371 with no usable relays. Instead, authorities refuse to build a
31372 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
31373 - If your relay can't keep up with the number of incoming create
31374 cells, it would log one warning per failure into your logs. Limit
31375 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
31376 - Bridges now use "reject *:*" as their default exit policy. Bugfix
31377 on 0.2.0.3-alpha; fixes bug 1113.
31378 - Fix a memory leak on directory authorities during voting that was
31379 introduced in 0.2.2.1-alpha. Found via valgrind.
31382 Changes in version 0.2.1.20 - 2009-10-15
31383 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
31384 services at once, prepares for more performance improvements, and
31385 fixes a bunch of smaller bugs.
31387 The Windows and OS X bundles also include a more recent Vidalia,
31388 and switch from Privoxy to Polipo.
31390 The OS X installers are now drag and drop. It's best to un-install
31391 Tor/Vidalia and then install this new bundle, rather than upgrade. If
31392 you want to upgrade, you'll need to update the paths for Tor and Polipo
31393 in the Vidalia Settings window.
31396 - Send circuit or stream sendme cells when our window has decreased
31397 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
31398 by Karsten when testing the "reduce circuit window" performance
31399 patch. Bugfix on the 54th commit on Tor -- from July 2002,
31400 before the release of Tor 0.0.0. This is the new winner of the
31402 - Fix a remotely triggerable memory leak when a consensus document
31403 contains more than one signature from the same voter. Bugfix on
31405 - Avoid segfault in rare cases when finishing an introduction circuit
31406 as a client and finding out that we don't have an introduction key
31407 for it. Fixes bug 1073. Reported by Aaron Swartz.
31410 - Tor now reads the "circwindow" parameter out of the consensus,
31411 and uses that value for its circuit package window rather than the
31412 default of 1000 cells. Begins the implementation of proposal 168.
31414 o New directory authorities:
31415 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
31417 - Move moria1 and tonga to alternate IP addresses.
31420 - Fix a signed/unsigned compile warning in 0.2.1.19.
31421 - Fix possible segmentation fault on directory authorities. Bugfix on
31423 - Fix an extremely rare infinite recursion bug that could occur if
31424 we tried to log a message after shutting down the log subsystem.
31425 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
31426 - Fix an obscure bug where hidden services on 64-bit big-endian
31427 systems might mis-read the timestamp in v3 introduce cells, and
31428 refuse to connect back to the client. Discovered by "rotor".
31429 Bugfix on 0.2.1.6-alpha.
31430 - We were triggering a CLOCK_SKEW controller status event whenever
31431 we connect via the v2 connection protocol to any relay that has
31432 a wrong clock. Instead, we should only inform the controller when
31433 it's a trusted authority that claims our clock is wrong. Bugfix
31434 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31435 - We were telling the controller about CHECKING_REACHABILITY and
31436 REACHABILITY_FAILED status events whenever we launch a testing
31437 circuit or notice that one has failed. Instead, only tell the
31438 controller when we want to inform the user of overall success or
31439 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31441 - Don't warn when we're using a circuit that ends with a node
31442 excluded in ExcludeExitNodes, but the circuit is not used to access
31443 the outside world. This should help fix bug 1090. Bugfix on
31445 - Work around a small memory leak in some versions of OpenSSL that
31446 stopped the memory used by the hostname TLS extension from being
31450 - Add a "getinfo status/accepted-server-descriptor" controller
31451 command, which is the recommended way for controllers to learn
31452 whether our server descriptor has been successfully received by at
31453 least on directory authority. Un-recommend good-server-descriptor
31454 getinfo and status events until we have a better design for them.
31457 Changes in version 0.2.2.5-alpha - 2009-10-11
31458 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
31461 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
31463 o Directory authorities:
31464 - Temporarily (just for this release) move dizum to an alternate
31468 Changes in version 0.2.2.4-alpha - 2009-10-10
31469 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
31470 introduces a new unit test framework, shifts directry authority
31471 addresses around to reduce the impact from recent blocking events,
31472 and fixes a few smaller bugs.
31475 - Fix several more asserts in the circuit_build_times code, for
31476 example one that causes Tor to fail to start once we have
31477 accumulated 5000 build times in the state file. Bugfixes on
31478 0.2.2.2-alpha; fixes bug 1108.
31480 o New directory authorities:
31481 - Move moria1 and Tonga to alternate IP addresses.
31484 - Log SSL state transitions at debug level during handshake, and
31485 include SSL states in error messages. This may help debug future
31486 SSL handshake issues.
31487 - Add a new "Handshake" log domain for activities that happen
31488 during the TLS handshake.
31489 - Revert to the "June 3 2009" ip-to-country file. The September one
31490 seems to have removed most US IP addresses.
31491 - Directory authorities now reject Tor relays with versions less than
31492 0.1.2.14. This step cuts out four relays from the current network,
31493 none of which are very big.
31496 - Fix a couple of smaller issues with gathering statistics. Bugfixes
31498 - Fix two memory leaks in the error case of
31499 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
31500 - Don't count one-hop circuits when we're estimating how long it
31501 takes circuits to build on average. Otherwise we'll set our circuit
31502 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
31503 - Directory authorities no longer change their opinion of, or vote on,
31504 whether a router is Running, unless they have themselves been
31505 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
31508 o Code simplifications and refactoring:
31509 - Revise our unit tests to use the "tinytest" framework, so we
31510 can run tests in their own processes, have smarter setup/teardown
31511 code, and so on. The unit test code has moved to its own
31512 subdirectory, and has been split into multiple modules.
31515 Changes in version 0.2.2.3-alpha - 2009-09-23
31516 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
31519 - Fix an overzealous assert in our new circuit build timeout code.
31520 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
31523 - If the networkstatus consensus tells us that we should use a
31524 negative circuit package window, ignore it. Otherwise we'll
31525 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
31528 Changes in version 0.2.2.2-alpha - 2009-09-21
31529 Tor 0.2.2.2-alpha introduces our latest performance improvement for
31530 clients: Tor tracks the average time it takes to build a circuit, and
31531 avoids using circuits that take too long to build. For fast connections,
31532 this feature can cut your expected latency in half. For slow or flaky
31533 connections, it could ruin your Tor experience. Let us know if it does!
31536 - Tor now tracks how long it takes to build client-side circuits
31537 over time, and adapts its timeout to local network performance.
31538 Since a circuit that takes a long time to build will also provide
31539 bad performance, we get significant latency improvements by
31540 discarding the slowest 20% of circuits. Specifically, Tor creates
31541 circuits more aggressively than usual until it has enough data
31542 points for a good timeout estimate. Implements proposal 151.
31543 We are especially looking for reports (good and bad) from users with
31544 both EDGE and broadband connections that can move from broadband
31545 to EDGE and find out if the build-time data in the .tor/state gets
31546 reset without loss of Tor usability. You should also see a notice
31547 log message telling you that Tor has reset its timeout.
31548 - Directory authorities can now vote on arbitrary integer values as
31549 part of the consensus process. This is designed to help set
31550 network-wide parameters. Implements proposal 167.
31551 - Tor now reads the "circwindow" parameter out of the consensus,
31552 and uses that value for its circuit package window rather than the
31553 default of 1000 cells. Begins the implementation of proposal 168.
31556 - Fix a remotely triggerable memory leak when a consensus document
31557 contains more than one signature from the same voter. Bugfix on
31561 - Fix an extremely rare infinite recursion bug that could occur if
31562 we tried to log a message after shutting down the log subsystem.
31563 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
31564 - Fix parsing for memory or time units given without a space between
31565 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
31566 - A networkstatus vote must contain exactly one signature. Spec
31567 conformance issue. Bugfix on 0.2.0.3-alpha.
31568 - Fix an obscure bug where hidden services on 64-bit big-endian
31569 systems might mis-read the timestamp in v3 introduce cells, and
31570 refuse to connect back to the client. Discovered by "rotor".
31571 Bugfix on 0.2.1.6-alpha.
31572 - We were triggering a CLOCK_SKEW controller status event whenever
31573 we connect via the v2 connection protocol to any relay that has
31574 a wrong clock. Instead, we should only inform the controller when
31575 it's a trusted authority that claims our clock is wrong. Bugfix
31576 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31577 - We were telling the controller about CHECKING_REACHABILITY and
31578 REACHABILITY_FAILED status events whenever we launch a testing
31579 circuit or notice that one has failed. Instead, only tell the
31580 controller when we want to inform the user of overall success or
31581 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31583 - Don't warn when we're using a circuit that ends with a node
31584 excluded in ExcludeExitNodes, but the circuit is not used to access
31585 the outside world. This should help fix bug 1090, but more problems
31586 remain. Bugfix on 0.2.1.6-alpha.
31587 - Work around a small memory leak in some versions of OpenSSL that
31588 stopped the memory used by the hostname TLS extension from being
31590 - Make our 'torify' script more portable; if we have only one of
31591 'torsocks' or 'tsocks' installed, don't complain to the user;
31592 and explain our warning about tsocks better.
31595 - Add a "getinfo status/accepted-server-descriptor" controller
31596 command, which is the recommended way for controllers to learn
31597 whether our server descriptor has been successfully received by at
31598 least on directory authority. Un-recommend good-server-descriptor
31599 getinfo and status events until we have a better design for them.
31600 - Update to the "September 4 2009" ip-to-country file.
31603 Changes in version 0.2.2.1-alpha - 2009-08-26
31604 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
31605 Tor clients to bootstrap on networks where only port 80 is reachable,
31606 makes it more straightforward to support hardware crypto accelerators,
31607 and starts the groundwork for gathering stats safely at relays.
31610 - Start the process of disabling ".exit" address notation, since it
31611 can be used for a variety of esoteric application-level attacks
31612 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
31615 o New directory authorities:
31616 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
31620 - New AccelName and AccelDir options add support for dynamic OpenSSL
31621 hardware crypto acceleration engines.
31622 - Tor now supports tunneling all of its outgoing connections over
31623 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
31624 configuration options. Code by Christopher Davis.
31627 - Send circuit or stream sendme cells when our window has decreased
31628 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
31629 by Karsten when testing the "reduce circuit window" performance
31630 patch. Bugfix on the 54th commit on Tor -- from July 2002,
31631 before the release of Tor 0.0.0. This is the new winner of the
31634 o New options for gathering stats safely:
31635 - Directory mirrors that set "DirReqStatistics 1" write statistics
31636 about directory requests to disk every 24 hours. As compared to the
31637 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
31638 1) stats are written to disk exactly every 24 hours; 2) estimated
31639 shares of v2 and v3 requests are determined as mean values, not at
31640 the end of a measurement period; 3) unresolved requests are listed
31641 with country code '??'; 4) directories also measure download times.
31642 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
31643 number of exit streams and transferred bytes per port to disk every
31645 - Relays that set "CellStatistics 1" write statistics on how long
31646 cells spend in their circuit queues to disk every 24 hours.
31647 - Entry nodes that set "EntryStatistics 1" write statistics on the
31648 rough number and origins of connecting clients to disk every 24
31650 - Relays that write any of the above statistics to disk and set
31651 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
31652 their extra-info documents.
31655 - New --digests command-line switch to output the digests of the
31656 source files Tor was built with.
31657 - The "torify" script now uses torsocks where available.
31658 - The memarea code now uses a sentinel value at the end of each area
31659 to make sure nothing writes beyond the end of an area. This might
31660 help debug some conceivable causes of bug 930.
31661 - Time and memory units in the configuration file can now be set to
31662 fractional units. For example, "2.5 GB" is now a valid value for
31664 - Certain Tor clients (such as those behind check.torproject.org) may
31665 want to fetch the consensus in an extra early manner. To enable this
31666 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
31667 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
31668 as only certain clients who must have this information sooner should
31670 - Instead of adding the svn revision to the Tor version string, report
31671 the git commit (when we're building from a git checkout).
31674 - If any of the v3 certs we download are unparseable, we should
31675 actually notice the failure so we don't retry indefinitely. Bugfix
31676 on 0.2.0.x; reported by "rotator".
31677 - If the cached cert file is unparseable, warn but don't exit.
31678 - Fix possible segmentation fault on directory authorities. Bugfix on
31680 - When Tor fails to parse a descriptor of any kind, dump it to disk.
31681 Might help diagnosing bug 1051.
31683 o Deprecated and removed features:
31684 - The controller no longer accepts the old obsolete "addr-mappings/"
31685 or "unregistered-servers-" GETINFO values.
31686 - Hidden services no longer publish version 0 descriptors, and clients
31687 do not request or use version 0 descriptors. However, the old hidden
31688 service authorities still accept and serve version 0 descriptors
31689 when contacted by older hidden services/clients.
31690 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
31691 always on; using them is necessary for correct forward-compatible
31693 - Remove support for .noconnect style addresses. Nobody was using
31694 them, and they provided another avenue for detecting Tor users
31695 via application-level web tricks.
31697 o Packaging changes:
31698 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
31699 installer bundles. See
31700 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
31701 for details of what's new in Vidalia 0.2.3.
31702 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
31703 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
31704 configuration file, rather than the old Privoxy.
31705 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
31706 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
31707 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
31708 better compatibility with OS X 10.6, aka Snow Leopard.
31709 - OS X Vidalia Bundle: The multi-package installer is now replaced
31710 by a simple drag and drop to the /Applications folder. This change
31711 occurred with the upgrade to Vidalia 0.2.3.
31714 Changes in version 0.2.1.19 - 2009-07-28
31715 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
31716 services on Tor 0.2.1.3-alpha through 0.2.1.18.
31719 - Make accessing hidden services on 0.2.1.x work right again.
31720 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
31721 part of patch provided by "optimist".
31724 - When a relay/bridge is writing out its identity key fingerprint to
31725 the "fingerprint" file and to its logs, write it without spaces. Now
31726 it will look like the fingerprints in our bridges documentation,
31727 and confuse fewer users.
31730 - Relays no longer publish a new server descriptor if they change
31731 their MaxAdvertisedBandwidth config option but it doesn't end up
31732 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
31733 fixes bug 1026. Patch from Sebastian.
31734 - Avoid leaking memory every time we get a create cell but we have
31735 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
31736 fixes bug 1034. Reported by BarkerJr.
31739 Changes in version 0.2.1.18 - 2009-07-24
31740 Tor 0.2.1.18 lays the foundations for performance improvements,
31741 adds status events to help users diagnose bootstrap problems, adds
31742 optional authentication/authorization for hidden services, fixes a
31743 variety of potential anonymity problems, and includes a huge pile of
31744 other features and bug fixes.
31747 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
31750 Changes in version 0.2.1.17-rc - 2009-07-07
31751 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
31752 candidate for the 0.2.1.x series. It lays the groundwork for further
31753 client performance improvements, and also fixes a big bug with directory
31754 authorities that were causing them to assign Guard and Stable flags
31757 The Windows bundles also finally include the geoip database that we
31758 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
31759 should actually install Torbutton rather than giving you a cryptic
31760 failure message (oops).
31763 - Clients now use the bandwidth values in the consensus, rather than
31764 the bandwidth values in each relay descriptor. This approach opens
31765 the door to more accurate bandwidth estimates once the directory
31766 authorities start doing active measurements. Implements more of
31770 - When Tor clients restart after 1-5 days, they discard all their
31771 cached descriptors as too old, but they still use the cached
31772 consensus document. This approach is good for robustness, but
31773 bad for performance: since they don't know any bandwidths, they
31774 end up choosing at random rather than weighting their choice by
31775 speed. Fixed by the above feature of putting bandwidths in the
31776 consensus. Bugfix on 0.2.0.x.
31777 - Directory authorities were neglecting to mark relays down in their
31778 internal histories if the relays fall off the routerlist without
31779 ever being found unreachable. So there were relays in the histories
31780 that haven't been seen for eight months, and are listed as being
31781 up for eight months. This wreaked havoc on the "median wfu"
31782 and "median mtbf" calculations, in turn making Guard and Stable
31783 flags very wrong, hurting network performance. Fixes bugs 696 and
31784 969. Bugfix on 0.2.0.6-alpha.
31787 - Serve the DirPortFrontPage page even when we have been approaching
31788 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
31789 - The control port would close the connection before flushing long
31790 replies, such as the network consensus, if a QUIT command was issued
31791 before the reply had completed. Now, the control port flushes all
31792 pending replies before closing the connection. Also fixed a spurious
31793 warning when a QUIT command is issued after a malformed or rejected
31794 AUTHENTICATE command, but before the connection was closed. Patch
31795 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
31796 - When we can't find an intro key for a v2 hidden service descriptor,
31797 fall back to the v0 hidden service descriptor and log a bug message.
31798 Workaround for bug 1024.
31799 - Fix a log message that did not respect the SafeLogging option.
31803 - If we're a relay and we change our IP address, be more verbose
31804 about the reason that made us change. Should help track down
31805 further bugs for relays on dynamic IP addresses.
31808 Changes in version 0.2.0.35 - 2009-06-24
31810 - Avoid crashing in the presence of certain malformed descriptors.
31811 Found by lark, and by automated fuzzing.
31812 - Fix an edge case where a malicious exit relay could convince a
31813 controller that the client's DNS question resolves to an internal IP
31814 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31817 - Finally fix the bug where dynamic-IP relays disappear when their
31818 IP address changes: directory mirrors were mistakenly telling
31819 them their old address if they asked via begin_dir, so they
31820 never got an accurate answer about their new address, so they
31821 just vanished after a day. For belt-and-suspenders, relays that
31822 don't set Address in their config now avoid using begin_dir for
31823 all direct connections. Should fix bugs 827, 883, and 900.
31824 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31825 that would occur on some exit nodes when DNS failures and timeouts
31826 occurred in certain patterns. Fix for bug 957.
31829 - When starting with a cache over a few days old, do not leak
31830 memory for the obsolete router descriptors in it. Bugfix on
31831 0.2.0.33; fixes bug 672.
31832 - Hidden service clients didn't use a cached service descriptor that
31833 was older than 15 minutes, but wouldn't fetch a new one either,
31834 because there was already one in the cache. Now, fetch a v2
31835 descriptor unless the same descriptor was added to the cache within
31836 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31839 Changes in version 0.2.1.16-rc - 2009-06-20
31840 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
31841 a bunch of minor bugs.
31844 - Fix an edge case where a malicious exit relay could convince a
31845 controller that the client's DNS question resolves to an internal IP
31846 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31848 o Major performance improvements (on 0.2.0.x):
31849 - Disable and refactor some debugging checks that forced a linear scan
31850 over the whole server-side DNS cache. These accounted for over 50%
31851 of CPU time on a relatively busy exit node's gprof profile. Found
31853 - Disable some debugging checks that appeared in exit node profile
31857 - Update to the "June 3 2009" ip-to-country file.
31858 - Do not have tor-resolve automatically refuse all .onion addresses;
31859 if AutomapHostsOnResolve is set in your torrc, this will work fine.
31861 o Minor bugfixes (on 0.2.0.x):
31862 - Log correct error messages for DNS-related network errors on
31864 - Fix a race condition that could cause crashes or memory corruption
31865 when running as a server with a controller listening for log
31867 - Avoid crashing when we have a policy specified in a DirPolicy or
31868 SocksPolicy or ReachableAddresses option with ports set on it,
31869 and we re-load the policy. May fix bug 996.
31870 - Hidden service clients didn't use a cached service descriptor that
31871 was older than 15 minutes, but wouldn't fetch a new one either,
31872 because there was already one in the cache. Now, fetch a v2
31873 descriptor unless the same descriptor was added to the cache within
31874 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31876 o Minor bugfixes (on 0.2.1.x):
31877 - Don't warn users about low port and hibernation mix when they
31878 provide a *ListenAddress directive to fix that. Bugfix on
31880 - When switching back and forth between bridge mode, do not start
31881 gathering GeoIP data until two hours have passed.
31882 - Do not complain that the user has requested an excluded node as
31883 an exit when the node is not really an exit. This could happen
31884 because the circuit was for testing, or an introduction point.
31888 Changes in version 0.2.1.15-rc - 2009-05-25
31889 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
31890 series. It fixes a major bug on fast exit relays, as well as a variety
31891 of more minor bugs.
31893 o Major bugfixes (on 0.2.0.x):
31894 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31895 that would occur on some exit nodes when DNS failures and timeouts
31896 occurred in certain patterns. Fix for bug 957.
31898 o Minor bugfixes (on 0.2.0.x):
31899 - Actually return -1 in the error case for read_bandwidth_usage().
31900 Harmless bug, since we currently don't care about the return value
31901 anywhere. Bugfix on 0.2.0.9-alpha.
31902 - Provide a more useful log message if bug 977 (related to buffer
31903 freelists) ever reappears, and do not crash right away.
31904 - Fix an assertion failure on 64-bit platforms when we allocated
31905 memory right up to the end of a memarea, then realigned the memory
31906 one step beyond the end. Fixes a possible cause of bug 930.
31907 - Protect the count of open sockets with a mutex, so we can't
31908 corrupt it when two threads are closing or opening sockets at once.
31909 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
31910 - Don't allow a bridge to publish its router descriptor to a
31911 non-bridge directory authority. Fixes part of bug 932.
31912 - When we change to or from being a bridge, reset our counts of
31913 client usage by country. Fixes bug 932.
31914 - Fix a bug that made stream bandwidth get misreported to the
31916 - Stop using malloc_usable_size() to use more area than we had
31917 actually allocated: it was safe, but made valgrind really unhappy.
31918 - Fix a memory leak when v3 directory authorities load their keys
31919 and cert from disk. Bugfix on 0.2.0.1-alpha.
31921 o Minor bugfixes (on 0.2.1.x):
31922 - Fix use of freed memory when deciding to mark a non-addable
31923 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
31926 Changes in version 0.2.1.14-rc - 2009-04-12
31927 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
31928 series. It begins fixing some major performance problems, and also
31929 finally addresses the bug that was causing relays on dynamic IP
31930 addresses to fall out of the directory.
31933 - Clients replace entry guards that were chosen more than a few months
31934 ago. This change should significantly improve client performance,
31935 especially once more people upgrade, since relays that have been
31936 a guard for a long time are currently overloaded.
31938 o Major bugfixes (on 0.2.0):
31939 - Finally fix the bug where dynamic-IP relays disappear when their
31940 IP address changes: directory mirrors were mistakenly telling
31941 them their old address if they asked via begin_dir, so they
31942 never got an accurate answer about their new address, so they
31943 just vanished after a day. For belt-and-suspenders, relays that
31944 don't set Address in their config now avoid using begin_dir for
31945 all direct connections. Should fix bugs 827, 883, and 900.
31946 - Relays were falling out of the networkstatus consensus for
31947 part of a day if they changed their local config but the
31948 authorities discarded their new descriptor as "not sufficiently
31949 different". Now directory authorities accept a descriptor as changed
31950 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
31951 patch by Sebastian.
31952 - Avoid crashing in the presence of certain malformed descriptors.
31953 Found by lark, and by automated fuzzing.
31956 - When generating circuit events with verbose nicknames for
31957 controllers, try harder to look up nicknames for routers on a
31958 circuit. (Previously, we would look in the router descriptors we had
31959 for nicknames, but not in the consensus.) Partial fix for bug 941.
31960 - If the bridge config line doesn't specify a port, assume 443.
31961 This makes bridge lines a bit smaller and easier for users to
31963 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
31964 bytes (aka 20KB/s), to match our documentation. Also update
31965 directory authorities so they always assign the Fast flag to relays
31966 with 20KB/s of capacity. Now people running relays won't suddenly
31967 find themselves not seeing any use, if the network gets faster
31969 - Update to the "April 3 2009" ip-to-country file.
31972 - Avoid trying to print raw memory to the logs when we decide to
31973 give up on downloading a given relay descriptor. Bugfix on
31975 - In tor-resolve, when the Tor client to use is specified by
31976 <hostname>:<port>, actually use the specified port rather than
31977 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
31978 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
31979 - When starting with a cache over a few days old, do not leak
31980 memory for the obsolete router descriptors in it. Bugfix on
31982 - Avoid double-free on list of successfully uploaded hidden
31983 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
31984 - Change memarea_strndup() implementation to work even when
31985 duplicating a string at the end of a page. This bug was
31986 harmless for now, but could have meant crashes later. Fix by
31987 lark. Bugfix on 0.2.1.1-alpha.
31988 - Limit uploaded directory documents to be 16M rather than 500K.
31989 The directory authorities were refusing v3 consensus votes from
31990 other authorities, since the votes are now 504K. Fixes bug 959;
31991 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
31992 - Directory authorities should never send a 503 "busy" response to
31993 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
31997 Changes in version 0.2.1.13-alpha - 2009-03-09
31998 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
31999 cleanups. We're finally getting close to a release candidate.
32002 - Correctly update the list of which countries we exclude as
32003 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
32004 lark. Bugfix on 0.2.1.6-alpha.
32006 o Minor bugfixes (on 0.2.0.x and earlier):
32007 - Automatically detect MacOSX versions earlier than 10.4.0, and
32008 disable kqueue from inside Tor when running with these versions.
32009 We previously did this from the startup script, but that was no
32010 help to people who didn't use the startup script. Resolves bug 863.
32011 - When we had picked an exit node for a connection, but marked it as
32012 "optional", and it turned out we had no onion key for the exit,
32013 stop wanting that exit and try again. This situation may not
32014 be possible now, but will probably become feasible with proposal
32015 158. Spotted by rovv. Fixes another case of bug 752.
32016 - Clients no longer cache certificates for authorities they do not
32017 recognize. Bugfix on 0.2.0.9-alpha.
32018 - When we can't transmit a DNS request due to a network error, retry
32019 it after a while, and eventually transmit a failing response to
32020 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
32021 - If the controller claimed responsibility for a stream, but that
32022 stream never finished making its connection, it would live
32023 forever in circuit_wait state. Now we close it after SocksTimeout
32024 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
32025 - Drop begin cells to a hidden service if they come from the middle
32026 of a circuit. Patch from lark.
32027 - When we erroneously receive two EXTEND cells for the same circuit
32028 ID on the same connection, drop the second. Patch from lark.
32029 - Fix a crash that occurs on exit nodes when a nameserver request
32030 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
32031 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
32033 - Do not assume that a stack-allocated character array will be
32034 64-bit aligned on platforms that demand that uint64_t access is
32035 aligned. Possible fix for bug 604.
32036 - Parse dates and IPv4 addresses in a locale- and libc-independent
32037 manner, to avoid platform-dependent behavior on malformed input.
32038 - Build correctly when configured to build outside the main source
32039 path. Patch from Michael Gold.
32040 - We were already rejecting relay begin cells with destination port
32041 of 0. Now also reject extend cells with destination port or address
32042 of 0. Suggested by lark.
32044 o Minor bugfixes (on 0.2.1.x):
32045 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
32046 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
32047 - If we're an exit node, scrub the IP address to which we are exiting
32048 in the logs. Bugfix on 0.2.1.8-alpha.
32051 - On Linux, use the prctl call to re-enable core dumps when the user
32053 - New controller event NEWCONSENSUS that lists the networkstatus
32054 lines for every recommended relay. Now controllers like Torflow
32055 can keep up-to-date on which relays they should be using.
32056 - Update to the "February 26 2009" ip-to-country file.
32059 Changes in version 0.2.0.34 - 2009-02-08
32060 Tor 0.2.0.34 features several more security-related fixes. You should
32061 upgrade, especially if you run an exit relay (remote crash) or a
32062 directory authority (remote infinite loop), or you're on an older
32063 (pre-XP) or not-recently-patched Windows (remote exploit).
32065 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
32066 have many known flaws, and nobody should be using them. You should
32067 upgrade. If you're using a Linux or BSD and its packages are obsolete,
32068 stop using those packages and upgrade anyway.
32071 - Fix an infinite-loop bug on handling corrupt votes under certain
32072 circumstances. Bugfix on 0.2.0.8-alpha.
32073 - Fix a temporary DoS vulnerability that could be performed by
32074 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
32075 - Avoid a potential crash on exit nodes when processing malformed
32076 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
32077 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
32078 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
32081 - Fix compilation on systems where time_t is a 64-bit integer.
32082 Patch from Matthias Drochner.
32083 - Don't consider expiring already-closed client connections. Fixes
32084 bug 893. Bugfix on 0.0.2pre20.
32087 Changes in version 0.2.1.12-alpha - 2009-02-08
32088 Tor 0.2.1.12-alpha features several more security-related fixes. You
32089 should upgrade, especially if you run an exit relay (remote crash) or
32090 a directory authority (remote infinite loop), or you're on an older
32091 (pre-XP) or not-recently-patched Windows (remote exploit). It also
32092 includes a big pile of minor bugfixes and cleanups.
32095 - Fix an infinite-loop bug on handling corrupt votes under certain
32096 circumstances. Bugfix on 0.2.0.8-alpha.
32097 - Fix a temporary DoS vulnerability that could be performed by
32098 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
32099 - Avoid a potential crash on exit nodes when processing malformed
32100 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
32103 - Let controllers actually ask for the "clients_seen" event for
32104 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
32105 reported by Matt Edman.
32106 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
32108 - Fix a bug in address parsing that was preventing bridges or hidden
32109 service targets from being at IPv6 addresses.
32110 - Solve a bug that kept hardware crypto acceleration from getting
32111 enabled when accounting was turned on. Fixes bug 907. Bugfix on
32113 - Remove a bash-ism from configure.in to build properly on non-Linux
32114 platforms. Bugfix on 0.2.1.1-alpha.
32115 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
32116 headers. Bugfix on 0.2.0.10-alpha.
32117 - Don't consider expiring already-closed client connections. Fixes
32118 bug 893. Bugfix on 0.0.2pre20.
32119 - Fix another interesting corner-case of bug 891 spotted by rovv:
32120 Previously, if two hosts had different amounts of clock drift, and
32121 one of them created a new connection with just the wrong timing,
32122 the other might decide to deprecate the new connection erroneously.
32123 Bugfix on 0.1.1.13-alpha.
32124 - Resolve a very rare crash bug that could occur when the user forced
32125 a nameserver reconfiguration during the middle of a nameserver
32126 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
32127 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
32128 Bugfix on 0.2.1.7-alpha.
32129 - If we're using bridges and our network goes away, be more willing
32130 to forgive our bridges and try again when we get an application
32131 request. Bugfix on 0.2.0.x.
32134 - Support platforms where time_t is 64 bits long. (Congratulations,
32135 NetBSD!) Patch from Matthias Drochner.
32136 - Add a 'getinfo status/clients-seen' controller command, in case
32137 controllers want to hear clients_seen events but connect late.
32140 - Disable GCC's strict alias optimization by default, to avoid the
32141 likelihood of its introducing subtle bugs whenever our code violates
32142 the letter of C99's alias rules.
32145 Changes in version 0.2.0.33 - 2009-01-21
32146 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
32147 useful to users. It also finally fixes a bug where a relay or client
32148 that's been off for many days would take a long time to bootstrap.
32150 This update also fixes an important security-related bug reported by
32151 Ilja van Sprundel. You should upgrade. (We'll send out more details
32152 about the bug once people have had some time to upgrade.)
32155 - Fix a heap-corruption bug that may be remotely triggerable on
32156 some platforms. Reported by Ilja van Sprundel.
32159 - When a stream at an exit relay is in state "resolving" or
32160 "connecting" and it receives an "end" relay cell, the exit relay
32161 would silently ignore the end cell and not close the stream. If
32162 the client never closes the circuit, then the exit relay never
32163 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
32164 reported by "wood".
32165 - When sending CREATED cells back for a given circuit, use a 64-bit
32166 connection ID to find the right connection, rather than an addr:port
32167 combination. Now that we can have multiple OR connections between
32168 the same ORs, it is no longer possible to use addr:port to uniquely
32169 identify a connection.
32170 - Bridge relays that had DirPort set to 0 would stop fetching
32171 descriptors shortly after startup, and then briefly resume
32172 after a new bandwidth test and/or after publishing a new bridge
32173 descriptor. Bridge users that try to bootstrap from them would
32174 get a recent networkstatus but would get descriptors from up to
32175 18 hours earlier, meaning most of the descriptors were obsolete
32176 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
32177 - Prevent bridge relays from serving their 'extrainfo' document
32178 to anybody who asks, now that extrainfo docs include potentially
32179 sensitive aggregated client geoip summaries. Bugfix on
32181 - If the cached networkstatus consensus is more than five days old,
32182 discard it rather than trying to use it. In theory it could be
32183 useful because it lists alternate directory mirrors, but in practice
32184 it just means we spend many minutes trying directory mirrors that
32185 are long gone from the network. Also discard router descriptors as
32186 we load them if they are more than five days old, since the onion
32187 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
32190 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
32191 could make gcc generate non-functional binary search code. Bugfix
32193 - Build correctly on platforms without socklen_t.
32194 - Compile without warnings on solaris.
32195 - Avoid potential crash on internal error during signature collection.
32196 Fixes bug 864. Patch from rovv.
32197 - Correct handling of possible malformed authority signing key
32198 certificates with internal signature types. Fixes bug 880.
32199 Bugfix on 0.2.0.3-alpha.
32200 - Fix a hard-to-trigger resource leak when logging credential status.
32202 - When we can't initialize DNS because the network is down, do not
32203 automatically stop Tor from starting. Instead, we retry failed
32204 dns_init() every 10 minutes, and change the exit policy to reject
32205 *:* until one succeeds. Fixes bug 691.
32206 - Use 64 bits instead of 32 bits for connection identifiers used with
32207 the controller protocol, to greatly reduce risk of identifier reuse.
32208 - When we're choosing an exit node for a circuit, and we have
32209 no pending streams, choose a good general exit rather than one that
32210 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32211 - Fix another case of assuming, when a specific exit is requested,
32212 that we know more than the user about what hosts it allows.
32213 Fixes one case of bug 752. Patch from rovv.
32214 - Clip the MaxCircuitDirtiness config option to a minimum of 10
32215 seconds. Warn the user if lower values are given in the
32216 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
32217 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
32218 user if lower values are given in the configuration. Bugfix on
32219 0.1.1.17-rc. Patch by Sebastian.
32220 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
32221 the cache because we already had a v0 descriptor with the same ID.
32222 Bugfix on 0.2.0.18-alpha.
32223 - Fix a race condition when freeing keys shared between main thread
32224 and CPU workers that could result in a memory leak. Bugfix on
32225 0.1.0.1-rc. Fixes bug 889.
32226 - Send a valid END cell back when a client tries to connect to a
32227 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32228 840. Patch from rovv.
32229 - Check which hops rendezvous stream cells are associated with to
32230 prevent possible guess-the-streamid injection attacks from
32231 intermediate hops. Fixes another case of bug 446. Based on patch
32233 - If a broken client asks a non-exit router to connect somewhere,
32234 do not even do the DNS lookup before rejecting the connection.
32235 Fixes another case of bug 619. Patch from rovv.
32236 - When a relay gets a create cell it can't decrypt (e.g. because it's
32237 using the wrong onion key), we were dropping it and letting the
32238 client time out. Now actually answer with a destroy cell. Fixes
32239 bug 904. Bugfix on 0.0.2pre8.
32241 o Minor bugfixes (hidden services):
32242 - Do not throw away existing introduction points on SIGHUP. Bugfix on
32243 0.0.6pre1. Patch by Karsten. Fixes bug 874.
32246 - Report the case where all signatures in a detached set are rejected
32247 differently than the case where there is an error handling the
32249 - When we realize that another process has modified our cached
32250 descriptors, print out a more useful error message rather than
32251 triggering an assertion. Fixes bug 885. Patch from Karsten.
32252 - Implement the 0x20 hack to better resist DNS poisoning: set the
32253 case on outgoing DNS requests randomly, and reject responses that do
32254 not match the case correctly. This logic can be disabled with the
32255 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32256 of servers that do not reliably preserve case in replies. See
32257 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32259 - Check DNS replies for more matching fields to better resist DNS
32261 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32262 compress cells, which are basically all encrypted, compressed, or
32266 Changes in version 0.2.1.11-alpha - 2009-01-20
32267 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
32268 week it will take a long time to bootstrap again" bug. It also fixes
32269 an important security-related bug reported by Ilja van Sprundel. You
32270 should upgrade. (We'll send out more details about the bug once people
32271 have had some time to upgrade.)
32274 - Fix a heap-corruption bug that may be remotely triggerable on
32275 some platforms. Reported by Ilja van Sprundel.
32278 - Discard router descriptors as we load them if they are more than
32279 five days old. Otherwise if Tor is off for a long time and then
32280 starts with cached descriptors, it will try to use the onion
32281 keys in those obsolete descriptors when building circuits. Bugfix
32282 on 0.2.0.x. Fixes bug 887.
32285 - Try to make sure that the version of Libevent we're running with
32286 is binary-compatible with the one we built with. May address bug
32288 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
32289 for bug 905. Bugfix on 0.2.1.7-alpha.
32290 - Add a new --enable-local-appdata configuration switch to change
32291 the default location of the datadir on win32 from APPDATA to
32292 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
32293 entirely. Patch from coderman.
32296 - Make outbound DNS packets respect the OutboundBindAddress setting.
32297 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
32298 - When our circuit fails at the first hop (e.g. we get a destroy
32299 cell back), avoid using that OR connection anymore, and also
32300 tell all the one-hop directory requests waiting for it that they
32301 should fail. Bugfix on 0.2.1.3-alpha.
32302 - In the torify(1) manpage, mention that tsocks will leak your
32306 Changes in version 0.2.1.10-alpha - 2009-01-06
32307 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
32308 would make the bridge relay not so useful if it had DirPort set to 0,
32309 and one that could let an attacker learn a little bit of information
32310 about the bridge's users), and a bug that would cause your Tor relay
32311 to ignore a circuit create request it can't decrypt (rather than reply
32312 with an error). It also fixes a wide variety of other bugs.
32315 - If the cached networkstatus consensus is more than five days old,
32316 discard it rather than trying to use it. In theory it could
32317 be useful because it lists alternate directory mirrors, but in
32318 practice it just means we spend many minutes trying directory
32319 mirrors that are long gone from the network. Helps bug 887 a bit;
32321 - Bridge relays that had DirPort set to 0 would stop fetching
32322 descriptors shortly after startup, and then briefly resume
32323 after a new bandwidth test and/or after publishing a new bridge
32324 descriptor. Bridge users that try to bootstrap from them would
32325 get a recent networkstatus but would get descriptors from up to
32326 18 hours earlier, meaning most of the descriptors were obsolete
32327 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
32328 - Prevent bridge relays from serving their 'extrainfo' document
32329 to anybody who asks, now that extrainfo docs include potentially
32330 sensitive aggregated client geoip summaries. Bugfix on
32334 - New controller event "clients_seen" to report a geoip-based summary
32335 of which countries we've seen clients from recently. Now controllers
32336 like Vidalia can show bridge operators that they're actually making
32338 - Build correctly against versions of OpenSSL 0.9.8 or later built
32339 without support for deprecated functions.
32340 - Update to the "December 19 2008" ip-to-country file.
32342 o Minor bugfixes (on 0.2.0.x):
32343 - Authorities now vote for the Stable flag for any router whose
32344 weighted MTBF is at least 5 days, regardless of the mean MTBF.
32345 - Do not remove routers as too old if we do not have any consensus
32346 document. Bugfix on 0.2.0.7-alpha.
32347 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
32348 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
32349 - When an exit relay resolves a stream address to a local IP address,
32350 do not just keep retrying that same exit relay over and
32351 over. Instead, just close the stream. Addresses bug 872. Bugfix
32352 on 0.2.0.32. Patch from rovv.
32353 - If a hidden service sends us an END cell, do not consider
32354 retrying the connection; just close it. Patch from rovv.
32355 - When we made bridge authorities stop serving bridge descriptors over
32356 unencrypted links, we also broke DirPort reachability testing for
32357 bridges. So bridges with a non-zero DirPort were printing spurious
32358 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
32359 - When a relay gets a create cell it can't decrypt (e.g. because it's
32360 using the wrong onion key), we were dropping it and letting the
32361 client time out. Now actually answer with a destroy cell. Fixes
32362 bug 904. Bugfix on 0.0.2pre8.
32363 - Squeeze 2-5% out of client performance (according to oprofile) by
32364 improving the implementation of some policy-manipulation functions.
32366 o Minor bugfixes (on 0.2.1.x):
32367 - Make get_interface_address() function work properly again; stop
32368 guessing the wrong parts of our address as our address.
32369 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
32370 send on that circuit. Otherwise we might violate the proposal-110
32371 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
32373 - When we're sending non-EXTEND cells to the first hop in a circuit,
32374 for example to use an encrypted directory connection, we don't need
32375 to use RELAY_EARLY cells: the first hop knows what kind of cell
32376 it is, and nobody else can even see the cell type. Conserving
32377 RELAY_EARLY cells makes it easier to cannibalize circuits like
32379 - Stop logging nameserver addresses in reverse order.
32380 - If we are retrying a directory download slowly over and over, do
32381 not automatically give up after the 254th failure. Bugfix on
32383 - Resume reporting accurate "stream end" reasons to the local control
32384 port. They were lost in the changes for Proposal 148. Bugfix on
32387 o Deprecated and removed features:
32388 - The old "tor --version --version" command, which would print out
32389 the subversion "Id" of most of the source files, is now removed. It
32390 turned out to be less useful than we'd expected, and harder to
32393 o Code simplifications and refactoring:
32394 - Change our header file guard macros to be less likely to conflict
32395 with system headers. Adam Langley noticed that we were conflicting
32396 with log.h on Android.
32397 - Tool-assisted documentation cleanup. Nearly every function or
32398 static variable in Tor should have its own documentation now.
32401 Changes in version 0.2.1.9-alpha - 2008-12-25
32402 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
32404 o New directory authorities:
32405 - gabelmoo (the authority run by Karsten Loesing) now has a new
32409 - Never use a connection with a mismatched address to extend a
32410 circuit, unless that connection is canonical. A canonical
32411 connection is one whose address is authenticated by the router's
32412 identity key, either in a NETINFO cell or in a router descriptor.
32413 - Avoid a possible memory corruption bug when receiving hidden service
32414 descriptors. Bugfix on 0.2.1.6-alpha.
32417 - Fix a logic error that would automatically reject all but the first
32418 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
32419 part of bug 813/868. Bug spotted by coderman.
32420 - When a stream at an exit relay is in state "resolving" or
32421 "connecting" and it receives an "end" relay cell, the exit relay
32422 would silently ignore the end cell and not close the stream. If
32423 the client never closes the circuit, then the exit relay never
32424 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
32425 reported by "wood".
32426 - When we can't initialize DNS because the network is down, do not
32427 automatically stop Tor from starting. Instead, retry failed
32428 dns_init() every 10 minutes, and change the exit policy to reject
32429 *:* until one succeeds. Fixes bug 691.
32432 - Give a better error message when an overzealous init script says
32433 "sudo -u username tor --user username". Makes Bug 882 easier for
32435 - When a directory authority gives us a new guess for our IP address,
32436 log which authority we used. Hopefully this will help us debug
32437 the recent complaints about bad IP address guesses.
32438 - Detect svn revision properly when we're using git-svn.
32439 - Try not to open more than one descriptor-downloading connection
32440 to an authority at once. This should reduce load on directory
32441 authorities. Fixes bug 366.
32442 - Add cross-certification to newly generated certificates, so that
32443 a signing key is enough information to look up a certificate.
32444 Partial implementation of proposal 157.
32445 - Start serving certificates by <identity digest, signing key digest>
32446 pairs. Partial implementation of proposal 157.
32447 - Clients now never report any stream end reason except 'MISC'.
32448 Implements proposal 148.
32449 - On platforms with a maximum syslog string length, truncate syslog
32450 messages to that length ourselves, rather than relying on the
32451 system to do it for us.
32452 - Optimize out calls to time(NULL) that occur for every IO operation,
32453 or for every cell. On systems where time() is a slow syscall,
32454 this fix will be slightly helpful.
32455 - Exit servers can now answer resolve requests for ip6.arpa addresses.
32456 - When we download a descriptor that we then immediately (as
32457 a directory authority) reject, do not retry downloading it right
32458 away. Should save some bandwidth on authorities. Fix for bug
32459 888. Patch by Sebastian Hahn.
32460 - When a download gets us zero good descriptors, do not notify
32461 Tor that new directory information has arrived.
32462 - Avoid some nasty corner cases in the logic for marking connections
32463 as too old or obsolete or noncanonical for circuits. Partial
32466 o Minor features (controller):
32467 - New CONSENSUS_ARRIVED event to note when a new consensus has
32468 been fetched and validated.
32469 - When we realize that another process has modified our cached
32470 descriptors file, print out a more useful error message rather
32471 than triggering an assertion. Fixes bug 885. Patch from Karsten.
32472 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
32473 controllers to prevent SIGHUP from reloading the
32474 configuration. Fixes bug 856.
32477 - Resume using the correct "REASON=" stream when telling the
32478 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
32479 - When a canonical connection appears later in our internal list
32480 than a noncanonical one for a given OR ID, always use the
32481 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
32483 - Clip the MaxCircuitDirtiness config option to a minimum of 10
32484 seconds. Warn the user if lower values are given in the
32485 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
32486 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
32487 user if lower values are given in the configuration. Bugfix on
32488 0.1.1.17-rc. Patch by Sebastian.
32489 - Fix a race condition when freeing keys shared between main thread
32490 and CPU workers that could result in a memory leak. Bugfix on
32491 0.1.0.1-rc. Fixes bug 889.
32493 o Minor bugfixes (hidden services):
32494 - Do not throw away existing introduction points on SIGHUP (bugfix on
32495 0.0.6pre1); also, do not stall hidden services because we're
32496 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
32497 by John Brooks. Patch by Karsten. Fixes bug 874.
32498 - Fix a memory leak when we decline to add a v2 rendezvous
32499 descriptor to the cache because we already had a v0 descriptor
32500 with the same ID. Bugfix on 0.2.0.18-alpha.
32502 o Deprecated and removed features:
32503 - RedirectExits has been removed. It was deprecated since
32505 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
32506 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
32507 - Cell pools are now always enabled; --disable-cell-pools is ignored.
32509 o Code simplifications and refactoring:
32510 - Rename the confusing or_is_obsolete field to the more appropriate
32511 is_bad_for_new_circs, and move it to or_connection_t where it
32513 - Move edge-only flags from connection_t to edge_connection_t: not
32514 only is this better coding, but on machines of plausible alignment,
32515 it should save 4-8 bytes per connection_t. "Every little bit helps."
32516 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
32517 for consistency; keep old option working for backward compatibility.
32518 - Simplify the code for finding connections to use for a circuit.
32521 Changes in version 0.2.1.8-alpha - 2008-12-08
32522 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
32523 builds better on unusual platforms like Solaris and old OS X, and
32524 fixes a variety of other issues.
32527 - New DirPortFrontPage option that takes an html file and publishes
32528 it as "/" on the DirPort. Now relay operators can provide a
32529 disclaimer without needing to set up a separate webserver. There's
32530 a sample disclaimer in contrib/tor-exit-notice.html.
32533 - When the client is choosing entry guards, now it selects at most
32534 one guard from a given relay family. Otherwise we could end up with
32535 all of our entry points into the network run by the same operator.
32536 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
32539 - Fix a DOS opportunity during the voting signature collection process
32540 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32541 - Fix a possible segfault when establishing an exit connection. Bugfix
32545 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
32547 - Made Tor a little less aggressive about deleting expired
32548 certificates. Partial fix for bug 854.
32549 - Stop doing unaligned memory access that generated bus errors on
32550 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
32551 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
32552 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
32553 - Make USR2 log-level switch take effect immediately. Bugfix on
32555 - If one win32 nameserver fails to get added, continue adding the
32556 rest, and don't automatically fail.
32557 - Use fcntl() for locking when flock() is not available. Should fix
32558 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
32559 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
32560 could make gcc generate non-functional binary search code. Bugfix
32562 - Build correctly on platforms without socklen_t.
32563 - Avoid potential crash on internal error during signature collection.
32564 Fixes bug 864. Patch from rovv.
32565 - Do not use C's stdio library for writing to log files. This will
32566 improve logging performance by a minute amount, and will stop
32567 leaking fds when our disk is full. Fixes bug 861.
32568 - Stop erroneous use of O_APPEND in cases where we did not in fact
32569 want to re-seek to the end of a file before every last write().
32570 - Correct handling of possible malformed authority signing key
32571 certificates with internal signature types. Fixes bug 880. Bugfix
32573 - Fix a hard-to-trigger resource leak when logging credential status.
32577 - Directory mirrors no longer fetch the v1 directory or
32578 running-routers files. They are obsolete, and nobody asks for them
32579 anymore. This is the first step to making v1 authorities obsolete.
32581 o Minor features (controller):
32582 - Return circuit purposes in response to GETINFO circuit-status. Fixes
32586 Changes in version 0.2.0.32 - 2008-11-20
32587 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
32588 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32589 a smaller security flaw that might allow an attacker to access local
32590 services, further improves hidden service performance, and fixes a
32591 variety of other issues.
32594 - The "User" and "Group" config options did not clear the
32595 supplementary group entries for the Tor process. The "User" option
32596 is now more robust, and we now set the groups to the specified
32597 user's primary group. The "Group" option is now ignored. For more
32598 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32599 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32600 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
32601 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32602 consistently obeyed: if an exit relay refuses a stream because its
32603 exit policy doesn't allow it, we would remember what IP address
32604 the relay said the destination address resolves to, even if it's
32605 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32608 - Fix a DOS opportunity during the voting signature collection process
32609 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32611 o Major bugfixes (hidden services):
32612 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32613 we were failing the whole hidden service request when the v0
32614 descriptor fetch fails, even if the v2 fetch is still pending and
32615 might succeed. Similarly, if the last v2 fetch fails, we were
32616 failing the whole hidden service request even if a v0 fetch is
32617 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32618 - When extending a circuit to a hidden service directory to upload a
32619 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32620 requests failed, because the router descriptor has not been
32621 downloaded yet. In these cases, do not attempt to upload the
32622 rendezvous descriptor, but wait until the router descriptor is
32623 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
32624 descriptor from a hidden service directory for which the router
32625 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
32629 - Fix several infrequent memory leaks spotted by Coverity.
32630 - When testing for libevent functions, set the LDFLAGS variable
32631 correctly. Found by Riastradh.
32632 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32633 bootstrapping with tunneled directory connections. Bugfix on
32634 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32635 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32636 and we know that server B rejects most-but-not all connections to
32637 port 80, we would previously reject the connection. Now, we assume
32638 the user knows what they were asking for. Fixes bug 752. Bugfix
32639 on 0.0.9rc5. Diagnosed by BarkerJr.
32640 - If we overrun our per-second write limits a little, count this as
32641 having used up our write allocation for the second, and choke
32642 outgoing directory writes. Previously, we had only counted this when
32643 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
32644 Bugfix on 0.2.0.x (??).
32645 - Remove the old v2 directory authority 'lefkada' from the default
32646 list. It has been gone for many months.
32647 - Stop doing unaligned memory access that generated bus errors on
32648 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
32649 - Make USR2 log-level switch take effect immediately. Bugfix on
32652 o Minor bugfixes (controller):
32653 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
32654 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
32657 Changes in version 0.2.1.7-alpha - 2008-11-08
32658 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
32659 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32660 a smaller security flaw that might allow an attacker to access local
32661 services, adds better defense against DNS poisoning attacks on exit
32662 relays, further improves hidden service performance, and fixes a
32663 variety of other issues.
32666 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32667 consistently obeyed: if an exit relay refuses a stream because its
32668 exit policy doesn't allow it, we would remember what IP address
32669 the relay said the destination address resolves to, even if it's
32670 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32671 - The "User" and "Group" config options did not clear the
32672 supplementary group entries for the Tor process. The "User" option
32673 is now more robust, and we now set the groups to the specified
32674 user's primary group. The "Group" option is now ignored. For more
32675 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32676 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32677 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
32678 - Do not use or believe expired v3 authority certificates. Patch
32679 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
32682 - Now NodeFamily and MyFamily config options allow spaces in
32683 identity fingerprints, so it's easier to paste them in.
32684 Suggested by Lucky Green.
32685 - Implement the 0x20 hack to better resist DNS poisoning: set the
32686 case on outgoing DNS requests randomly, and reject responses that do
32687 not match the case correctly. This logic can be disabled with the
32688 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32689 of servers that do not reliably preserve case in replies. See
32690 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32692 - Preserve case in replies to DNSPort requests in order to support
32693 the 0x20 hack for resisting DNS poisoning attacks.
32695 o Hidden service performance improvements:
32696 - When the client launches an introduction circuit, retry with a
32697 new circuit after 30 seconds rather than 60 seconds.
32698 - Launch a second client-side introduction circuit in parallel
32699 after a delay of 15 seconds (based on work by Christian Wilms).
32700 - Hidden services start out building five intro circuits rather
32701 than three, and when the first three finish they publish a service
32702 descriptor using those. Now we publish our service descriptor much
32703 faster after restart.
32706 - Minor fix in the warning messages when you're having problems
32707 bootstrapping; also, be more forgiving of bootstrap problems when
32708 we're still making incremental progress on a given bootstrap phase.
32709 - When we're choosing an exit node for a circuit, and we have
32710 no pending streams, choose a good general exit rather than one that
32711 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32712 - Send a valid END cell back when a client tries to connect to a
32713 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32714 840. Patch from rovv.
32715 - If a broken client asks a non-exit router to connect somewhere,
32716 do not even do the DNS lookup before rejecting the connection.
32717 Fixes another case of bug 619. Patch from rovv.
32718 - Fix another case of assuming, when a specific exit is requested,
32719 that we know more than the user about what hosts it allows.
32720 Fixes another case of bug 752. Patch from rovv.
32721 - Check which hops rendezvous stream cells are associated with to
32722 prevent possible guess-the-streamid injection attacks from
32723 intermediate hops. Fixes another case of bug 446. Based on patch
32725 - Avoid using a negative right-shift when comparing 32-bit
32726 addresses. Possible fix for bug 845 and bug 811.
32727 - Make the assert_circuit_ok() function work correctly on circuits that
32728 have already been marked for close.
32729 - Fix read-off-the-end-of-string error in unit tests when decoding
32730 introduction points.
32731 - Fix uninitialized size field for memory area allocation: may improve
32732 memory performance during directory parsing.
32733 - Treat duplicate certificate fetches as failures, so that we do
32734 not try to re-fetch an expired certificate over and over and over.
32735 - Do not say we're fetching a certificate when we'll in fact skip it
32736 because of a pending download.
32739 Changes in version 0.2.1.6-alpha - 2008-09-30
32740 Tor 0.2.1.6-alpha further improves performance and robustness of
32741 hidden services, starts work on supporting per-country relay selection,
32742 and fixes a variety of smaller issues.
32745 - Implement proposal 121: make it possible to build hidden services
32746 that only certain clients are allowed to connect to. This is
32747 enforced at several points, so that unauthorized clients are unable
32748 to send INTRODUCE cells to the service, or even (depending on the
32749 type of authentication) to learn introduction points. This feature
32750 raises the bar for certain kinds of active attacks against hidden
32751 services. Code by Karsten Loesing.
32752 - Relays now store and serve v2 hidden service descriptors by default,
32753 i.e., the new default value for HidServDirectoryV2 is 1. This is
32754 the last step in proposal 114, which aims to make hidden service
32755 lookups more reliable.
32756 - Start work to allow node restrictions to include country codes. The
32757 syntax to exclude nodes in a country with country code XX is
32758 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
32759 refinement to decide what config options should take priority if
32760 you ask to both use a particular node and exclude it.
32761 - Allow ExitNodes list to include IP ranges and country codes, just
32762 like the Exclude*Nodes lists. Patch from Robert Hogan.
32765 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
32766 Tor to fail to start if you had it configured to use a bridge
32767 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
32768 - When extending a circuit to a hidden service directory to upload a
32769 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32770 requests failed, because the router descriptor had not been
32771 downloaded yet. In these cases, we now wait until the router
32772 descriptor is downloaded, and then retry. Likewise, clients
32773 now skip over a hidden service directory if they don't yet have
32774 its router descriptor, rather than futilely requesting it and
32775 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
32777 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32778 we were failing the whole hidden service request when the v0
32779 descriptor fetch fails, even if the v2 fetch is still pending and
32780 might succeed. Similarly, if the last v2 fetch fails, we were
32781 failing the whole hidden service request even if a v0 fetch is
32782 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32783 - DNS replies need to have names matching their requests, but
32784 these names should be in the questions section, not necessarily
32785 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
32788 - Update to the "September 1 2008" ip-to-country file.
32789 - Allow ports 465 and 587 in the default exit policy again. We had
32790 rejected them in 0.1.0.15, because back in 2005 they were commonly
32791 misconfigured and ended up as spam targets. We hear they are better
32792 locked down these days.
32793 - Use a lockfile to make sure that two Tor processes are not
32794 simultaneously running with the same datadir.
32795 - Serve the latest v3 networkstatus consensus via the control
32796 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
32797 - Better logging about stability/reliability calculations on directory
32799 - Drop the requirement to have an open dir port for storing and
32800 serving v2 hidden service descriptors.
32801 - Directory authorities now serve a /tor/dbg-stability.txt URL to
32802 help debug WFU and MTBF calculations.
32803 - Implement most of Proposal 152: allow specialized servers to permit
32804 single-hop circuits, and clients to use those servers to build
32805 single-hop circuits when using a specialized controller. Patch
32806 from Josh Albrecht. Resolves feature request 768.
32807 - Add a -p option to tor-resolve for specifying the SOCKS port: some
32808 people find host:port too confusing.
32809 - Make TrackHostExit mappings expire a while after their last use, not
32810 after their creation. Patch from Robert Hogan.
32811 - Provide circuit purposes along with circuit events to the controller.
32814 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
32816 - Fixed some memory leaks -- some quite frequent, some almost
32817 impossible to trigger -- based on results from Coverity.
32818 - When testing for libevent functions, set the LDFLAGS variable
32819 correctly. Found by Riastradh.
32820 - Fix an assertion bug in parsing policy-related options; possible fix
32822 - Catch and report a few more bootstrapping failure cases when Tor
32823 fails to establish a TCP connection. Cleanup on 0.2.1.x.
32824 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32825 bootstrapping with tunneled directory connections. Bugfix on
32826 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32827 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32828 and we know that server B rejects most-but-not all connections to
32829 port 80, we would previously reject the connection. Now, we assume
32830 the user knows what they were asking for. Fixes bug 752. Bugfix
32831 on 0.0.9rc5. Diagnosed by BarkerJr.
32832 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
32833 service directories if they have no advertised dir port. Bugfix
32835 - If we overrun our per-second write limits a little, count this as
32836 having used up our write allocation for the second, and choke
32837 outgoing directory writes. Previously, we had only counted this when
32838 we had met our limits precisely. Fixes bug 824. Patch by rovv.
32839 Bugfix on 0.2.0.x (??).
32840 - Avoid a "0 divided by 0" calculation when calculating router uptime
32841 at directory authorities. Bugfix on 0.2.0.8-alpha.
32842 - Make DNS resolved controller events into "CLOSED", not
32843 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
32845 - Fix a bug where an unreachable relay would establish enough
32846 reachability testing circuits to do a bandwidth test -- if
32847 we already have a connection to the middle hop of the testing
32848 circuit, then it could establish the last hop by using the existing
32849 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
32850 circuits no longer use entry guards in 0.2.1.3-alpha.
32851 - If we have correct permissions on $datadir, we complain to stdout
32852 and fail to start. But dangerous permissions on
32853 $datadir/cached-status/ would cause us to open a log and complain
32854 there. Now complain to stdout and fail to start in both cases. Fixes
32855 bug 820, reported by seeess.
32856 - Remove the old v2 directory authority 'lefkada' from the default
32857 list. It has been gone for many months.
32859 o Code simplifications and refactoring:
32860 - Revise the connection_new functions so that a more typesafe variant
32861 exists. This will work better with Coverity, and let us find any
32862 actual mistakes we're making here.
32863 - Refactor unit testing logic so that dmalloc can be used sensibly
32864 with unit tests to check for memory leaks.
32865 - Move all hidden-service related fields from connection and circuit
32866 structure to substructures: this way they won't eat so much memory.
32869 Changes in version 0.2.0.31 - 2008-09-03
32870 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
32871 a big bug we're seeing where in rare cases traffic from one Tor stream
32872 gets mixed into another stream, and fixes a variety of smaller issues.
32875 - Make sure that two circuits can never exist on the same connection
32876 with the same circuit ID, even if one is marked for close. This
32877 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
32878 - Relays now reject risky extend cells: if the extend cell includes
32879 a digest of all zeroes, or asks to extend back to the relay that
32880 sent the extend cell, tear down the circuit. Ideas suggested
32882 - If not enough of our entry guards are available so we add a new
32883 one, we might use the new one even if it overlapped with the
32884 current circuit's exit relay (or its family). Anonymity bugfix
32885 pointed out by rovv.
32888 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32889 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32890 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32891 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32892 - Pick size of default geoip filename string correctly on windows.
32893 Fixes bug 806. Bugfix on 0.2.0.30.
32894 - Make the autoconf script accept the obsolete --with-ssl-dir
32895 option as an alias for the actually-working --with-openssl-dir
32896 option. Fix the help documentation to recommend --with-openssl-dir.
32897 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32898 - When using the TransPort option on OpenBSD, and using the User
32899 option to change UID and drop privileges, make sure to open
32900 /dev/pf before dropping privileges. Fixes bug 782. Patch from
32901 Christopher Davis. Bugfix on 0.1.2.1-alpha.
32902 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32903 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32904 on the client side when connecting to a hidden service. Bugfix
32905 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32906 - When closing an application-side connection because its circuit is
32907 getting torn down, generate the stream event correctly. Bugfix on
32908 0.1.2.x. Anonymous patch.
32911 Changes in version 0.2.1.5-alpha - 2008-08-31
32912 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
32913 in a lot of the infrastructure for adding authorization to hidden
32914 services, lays the groundwork for having clients read their load
32915 balancing information out of the networkstatus consensus rather than
32916 the individual router descriptors, addresses two potential anonymity
32917 issues, and fixes a variety of smaller issues.
32920 - Convert many internal address representations to optionally hold
32922 - Generate and accept IPv6 addresses in many protocol elements.
32923 - Make resolver code handle nameservers located at ipv6 addresses.
32924 - Begin implementation of proposal 121 ("Client authorization for
32925 hidden services"): configure hidden services with client
32926 authorization, publish descriptors for them, and configure
32927 authorization data for hidden services at clients. The next
32928 step is to actually access hidden services that perform client
32930 - More progress toward proposal 141: Network status consensus
32931 documents and votes now contain bandwidth information for each
32932 router and a summary of that router's exit policy. Eventually this
32933 will be used by clients so that they do not have to download every
32934 known descriptor before building circuits.
32936 o Major bugfixes (on 0.2.0.x and before):
32937 - When sending CREATED cells back for a given circuit, use a 64-bit
32938 connection ID to find the right connection, rather than an addr:port
32939 combination. Now that we can have multiple OR connections between
32940 the same ORs, it is no longer possible to use addr:port to uniquely
32941 identify a connection.
32942 - Relays now reject risky extend cells: if the extend cell includes
32943 a digest of all zeroes, or asks to extend back to the relay that
32944 sent the extend cell, tear down the circuit. Ideas suggested
32946 - If not enough of our entry guards are available so we add a new
32947 one, we might use the new one even if it overlapped with the
32948 current circuit's exit relay (or its family). Anonymity bugfix
32949 pointed out by rovv.
32952 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32953 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32954 - When using the TransPort option on OpenBSD, and using the User
32955 option to change UID and drop privileges, make sure to open /dev/pf
32956 before dropping privileges. Fixes bug 782. Patch from Christopher
32957 Davis. Bugfix on 0.1.2.1-alpha.
32958 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32959 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32960 - Add a missing safe_str() call for a debug log message.
32961 - Use 64 bits instead of 32 bits for connection identifiers used with
32962 the controller protocol, to greatly reduce risk of identifier reuse.
32963 - Make the autoconf script accept the obsolete --with-ssl-dir
32964 option as an alias for the actually-working --with-openssl-dir
32965 option. Fix the help documentation to recommend --with-openssl-dir.
32966 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32969 - Rate-limit too-many-sockets messages: when they happen, they happen
32970 a lot. Resolves bug 748.
32971 - Resist DNS poisoning a little better by making sure that names in
32972 answer sections match.
32973 - Print the SOCKS5 error message string as well as the error code
32974 when a tor-resolve request fails. Patch from Jacob.
32977 Changes in version 0.2.1.4-alpha - 2008-08-04
32978 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
32981 - The address part of exit policies was not correctly written
32982 to router descriptors. This generated router descriptors that failed
32983 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
32985 - Tor triggered a false assert when extending a circuit to a relay
32986 but we already have a connection open to that relay. Noticed by
32987 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
32990 - Fix a hidden service logging bug: in some edge cases, the router
32991 descriptor of a previously picked introduction point becomes
32992 obsolete and we need to give up on it rather than continually
32993 complaining that it has become obsolete. Observed by xiando. Bugfix
32996 o Removed features:
32997 - Take out the TestVia config option, since it was a workaround for
32998 a bug that was fixed in Tor 0.1.1.21.
33001 Changes in version 0.2.1.3-alpha - 2008-08-03
33002 Tor 0.2.1.3-alpha implements most of the pieces to prevent
33003 infinite-length circuit attacks (see proposal 110); fixes a bug that
33004 might cause exit relays to corrupt streams they send back; allows
33005 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
33006 ExcludeExitNodes config options; and fixes a big pile of bugs.
33008 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
33009 - Send a bootstrap problem "warn" event on the first problem if the
33010 reason is NO_ROUTE (that is, our network is down).
33013 - Implement most of proposal 110: The first K cells to be sent
33014 along a circuit are marked as special "early" cells; only K "early"
33015 cells will be allowed. Once this code is universal, we can block
33016 certain kinds of DOS attack by requiring that EXTEND commands must
33017 be sent using an "early" cell.
33020 - Try to attach connections immediately upon receiving a RENDEZVOUS2
33021 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
33022 on the client side when connecting to a hidden service. Bugfix
33023 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
33024 - Ensure that two circuits can never exist on the same connection
33025 with the same circuit ID, even if one is marked for close. This
33026 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
33029 - When relays do their initial bandwidth measurement, don't limit
33030 to just our entry guards for the test circuits. Otherwise we tend
33031 to have multiple test circuits going through a single entry guard,
33032 which makes our bandwidth test less accurate. Fixes part of bug 654;
33033 patch contributed by Josh Albrecht.
33034 - Add an ExcludeExitNodes option so users can list a set of nodes
33035 that should be be excluded from the exit node position, but
33036 allowed elsewhere. Implements proposal 151.
33037 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
33038 ExcludeNodes and ExcludeExitNodes lists.
33039 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
33040 be more efficient. Formerly it was quadratic in the number of
33041 servers; now it should be linear. Fixes bug 509.
33042 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
33043 and n_conn_id_digest fields into a separate structure that's
33044 only needed when the circuit has not yet attached to an n_conn.
33047 - Change the contrib/tor.logrotate script so it makes the new
33048 logs as "_tor:_tor" rather than the default, which is generally
33049 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
33050 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
33051 warnings (occasionally), but it can also cause the compiler to
33052 eliminate error-checking code. Suggested by Peter Gutmann.
33053 - When a hidden service is giving up on an introduction point candidate
33054 that was not included in the last published rendezvous descriptor,
33055 don't reschedule publication of the next descriptor. Fixes bug 763.
33057 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
33058 HiddenServiceExcludeNodes as obsolete: they never worked properly,
33059 and nobody claims to be using them. Fixes bug 754. Bugfix on
33060 0.1.0.1-rc. Patch from Christian Wilms.
33061 - Fix a small alignment and memory-wasting bug on buffer chunks.
33064 o Minor bugfixes (controller):
33065 - When closing an application-side connection because its circuit
33066 is getting torn down, generate the stream event correctly.
33067 Bugfix on 0.1.2.x. Anonymous patch.
33069 o Removed features:
33070 - Remove all backward-compatibility code to support relays running
33071 versions of Tor so old that they no longer work at all on the
33075 Changes in version 0.2.0.30 - 2008-07-15
33077 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
33078 warnings (occasionally), but it can also cause the compiler to
33079 eliminate error-checking code. Suggested by Peter Gutmann.
33082 Changes in version 0.2.0.29-rc - 2008-07-08
33083 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
33084 hidden-service performance bugs, and fixes a bunch of smaller bugs.
33087 - If you have more than one bridge but don't know their keys,
33088 you would only launch a request for the descriptor of the first one
33089 on your list. (Tor considered launching requests for the others, but
33090 found that it already had a connection on the way for $0000...0000
33091 so it didn't open another.) Bugfix on 0.2.0.x.
33092 - If you have more than one bridge but don't know their keys, and the
33093 connection to one of the bridges failed, you would cancel all
33094 pending bridge connections. (After all, they all have the same
33095 digest.) Bugfix on 0.2.0.x.
33096 - When a hidden service was trying to establish an introduction point,
33097 and Tor had built circuits preemptively for such purposes, we
33098 were ignoring all the preemptive circuits and launching a new one
33099 instead. Bugfix on 0.2.0.14-alpha.
33100 - When a hidden service was trying to establish an introduction point,
33101 and Tor *did* manage to reuse one of the preemptively built
33102 circuits, it didn't correctly remember which one it used,
33103 so it asked for another one soon after, until there were no
33104 more preemptive circuits, at which point it launched one from
33105 scratch. Bugfix on 0.0.9.x.
33106 - Make directory servers include the X-Your-Address-Is: http header in
33107 their responses even for begin_dir conns. Now clients who only
33108 ever use begin_dir connections still have a way to learn their IP
33109 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
33112 - Fix a macro/CPP interaction that was confusing some compilers:
33113 some GCCs don't like #if/#endif pairs inside macro arguments.
33115 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
33116 Fixes bug 704; fix from Steven Murdoch.
33117 - When opening /dev/null in finish_daemonize(), do not pass the
33118 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
33119 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
33120 - Correctly detect transparent proxy support on Linux hosts that
33121 require in.h to be included before netfilter_ipv4.h. Patch
33123 - Disallow session resumption attempts during the renegotiation
33124 stage of the v2 handshake protocol. Clients should never be trying
33125 session resumption at this point, but apparently some did, in
33126 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
33127 found by Geoff Goodell.
33130 Changes in version 0.2.1.2-alpha - 2008-06-20
33131 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
33132 make it easier to set up your own private Tor network; fixes several
33133 big bugs with using more than one bridge relay; fixes a big bug with
33134 offering hidden services quickly after Tor starts; and uses a better
33135 API for reporting potential bootstrapping problems to the controller.
33138 - New TestingTorNetwork config option to allow adjustment of
33139 previously constant values that, while reasonable, could slow
33140 bootstrapping. Implements proposal 135. Patch from Karsten.
33143 - If you have more than one bridge but don't know their digests,
33144 you would only learn a request for the descriptor of the first one
33145 on your list. (Tor considered launching requests for the others, but
33146 found that it already had a connection on the way for $0000...0000
33147 so it didn't open another.) Bugfix on 0.2.0.x.
33148 - If you have more than one bridge but don't know their digests,
33149 and the connection to one of the bridges failed, you would cancel
33150 all pending bridge connections. (After all, they all have the
33151 same digest.) Bugfix on 0.2.0.x.
33152 - When establishing a hidden service, introduction points that
33153 originate from cannibalized circuits are completely ignored and not
33154 included in rendezvous service descriptors. This might be another
33155 reason for delay in making a hidden service available. Bugfix
33156 from long ago (0.0.9.x?)
33159 - Allow OpenSSL to use dynamic locks if it wants.
33160 - When building a consensus, do not include routers that are down.
33161 This will cut down 30% to 40% on consensus size. Implements
33163 - In directory authorities' approved-routers files, allow
33164 fingerprints with or without space.
33165 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
33166 controller can query our current bootstrap state in case it attaches
33167 partway through and wants to catch up.
33168 - Send an initial "Starting" bootstrap status event, so we have a
33169 state to start out in.
33172 - Asking for a conditional consensus at .../consensus/<fingerprints>
33173 would crash a dirserver if it did not already have a
33174 consensus. Bugfix on 0.2.1.1-alpha.
33175 - Clean up some macro/CPP interactions: some GCC versions don't like
33176 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
33179 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
33180 - Directory authorities shouldn't complain about bootstrapping
33181 problems just because they do a lot of reachability testing and
33182 some of the connection attempts fail.
33183 - Start sending "count" and "recommendation" key/value pairs in
33184 bootstrap problem status events, so the controller can hear about
33185 problems even before Tor decides they're worth reporting for sure.
33186 - If you're using bridges, generate "bootstrap problem" warnings
33187 as soon as you run out of working bridges, rather than waiting
33188 for ten failures -- which will never happen if you have less than
33190 - If we close our OR connection because there's been a circuit
33191 pending on it for too long, we were telling our bootstrap status
33192 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
33195 Changes in version 0.2.1.1-alpha - 2008-06-13
33196 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
33197 were making the Tor process bloat especially on Linux; makes our TLS
33198 handshake blend in better; sends "bootstrap phase" status events to
33199 the controller, so it can keep the user informed of progress (and
33200 problems) fetching directory information and establishing circuits;
33201 and adds a variety of smaller features.
33204 - More work on making our TLS handshake blend in: modify the list
33205 of ciphers advertised by OpenSSL in client mode to even more
33206 closely resemble a common web browser. We cheat a little so that
33207 we can advertise ciphers that the locally installed OpenSSL doesn't
33209 - Start sending "bootstrap phase" status events to the controller,
33210 so it can keep the user informed of progress fetching directory
33211 information and establishing circuits. Also inform the controller
33212 if we think we're stuck at a particular bootstrap phase. Implements
33214 - Resume using OpenSSL's RAND_poll() for better (and more portable)
33215 cross-platform entropy collection again. We used to use it, then
33216 stopped using it because of a bug that could crash systems that
33217 called RAND_poll when they had a lot of fds open. It looks like the
33218 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
33219 at startup, and to call RAND_poll() when we reseed later only if
33220 we have a non-buggy OpenSSL version.
33223 - When we choose to abandon a new entry guard because we think our
33224 older ones might be better, close any circuits pending on that
33225 new entry guard connection. This fix should make us recover much
33226 faster when our network is down and then comes back. Bugfix on
33227 0.1.2.8-beta; found by lodger.
33229 o Memory fixes and improvements:
33230 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
33231 to avoid unused RAM in buffer chunks and memory pools.
33232 - Speed up parsing and cut down on memory fragmentation by using
33233 stack-style allocations for parsing directory objects. Previously,
33234 this accounted for over 40% of allocations from within Tor's code
33235 on a typical directory cache.
33236 - Use a Bloom filter rather than a digest-based set to track which
33237 descriptors we need to keep around when we're cleaning out old
33238 router descriptors. This speeds up the computation significantly,
33239 and may reduce fragmentation.
33240 - Reduce the default smartlist size from 32 to 16; it turns out that
33241 most smartlists hold around 8-12 elements tops.
33242 - Make dumpstats() log the fullness and size of openssl-internal
33244 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
33245 patch to their OpenSSL, turn it on to save memory on servers. This
33246 patch will (with any luck) get included in a mainline distribution
33248 - Never use OpenSSL compression: it wastes RAM and CPU trying to
33249 compress cells, which are basically all encrypted, compressed,
33253 - Stop reloading the router list from disk for no reason when we
33254 run out of reachable directory mirrors. Once upon a time reloading
33255 it would set the 'is_running' flag back to 1 for them. It hasn't
33256 done that for a long time.
33257 - In very rare situations new hidden service descriptors were
33258 published earlier than 30 seconds after the last change to the
33259 service. (We currently think that a hidden service descriptor
33260 that's been stable for 30 seconds is worth publishing.)
33263 - Allow separate log levels to be configured for different logging
33264 domains. For example, this allows one to log all notices, warnings,
33265 or errors, plus all memory management messages of level debug or
33266 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
33267 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
33268 and stop using a warning that had become unfixably verbose under
33270 - New --hush command-line option similar to --quiet. While --quiet
33271 disables all logging to the console on startup, --hush limits the
33272 output to messages of warning and error severity.
33273 - Servers support a new URL scheme for consensus downloads that
33274 allows the client to specify which authorities are trusted.
33275 The server then only sends the consensus if the client will trust
33276 it. Otherwise a 404 error is sent back. Clients use this
33277 new scheme when the server supports it (meaning it's running
33278 0.2.1.1-alpha or later). Implements proposal 134.
33279 - New configure/torrc options (--enable-geoip-stats,
33280 DirRecordUsageByCountry) to record how many IPs we've served
33281 directory info to in each country code, how many status documents
33282 total we've sent to each country code, and what share of the total
33283 directory requests we should expect to see.
33284 - Use the TLS1 hostname extension to more closely resemble browser
33286 - Lots of new unit tests.
33287 - Add a macro to implement the common pattern of iterating through
33288 two parallel lists in lockstep.
33291 Changes in version 0.2.0.28-rc - 2008-06-13
33292 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
33293 performance bug, and fixes a bunch of smaller bugs.
33296 - Fix a bug where, when we were choosing the 'end stream reason' to
33297 put in our relay end cell that we send to the exit relay, Tor
33298 clients on Windows were sometimes sending the wrong 'reason'. The
33299 anonymity problem is that exit relays may be able to guess whether
33300 the client is running Windows, thus helping partition the anonymity
33301 set. Down the road we should stop sending reasons to exit relays,
33302 or otherwise prevent future versions of this bug.
33305 - While setting up a hidden service, some valid introduction circuits
33306 were overlooked and abandoned. This might be the reason for
33307 the long delay in making a hidden service available. Bugfix on
33311 - Update to the "June 9 2008" ip-to-country file.
33312 - Run 'make test' as part of 'make dist', so we stop releasing so
33313 many development snapshots that fail their unit tests.
33316 - When we're checking if we have enough dir info for each relay
33317 to begin establishing circuits, make sure that we actually have
33318 the descriptor listed in the consensus, not just any descriptor.
33320 - Bridge relays no longer print "xx=0" in their extrainfo document
33321 for every single country code in the geoip db. Bugfix on
33323 - Only warn when we fail to load the geoip file if we were planning to
33324 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
33325 - If we change our MaxAdvertisedBandwidth and then reload torrc,
33326 Tor won't realize it should publish a new relay descriptor. Fixes
33327 bug 688, reported by mfr. Bugfix on 0.1.2.x.
33328 - When we haven't had any application requests lately, don't bother
33329 logging that we have expired a bunch of descriptors. Bugfix
33331 - Make relay cells written on a connection count as non-padding when
33332 tracking how long a connection has been in use. Bugfix on
33333 0.2.0.1-alpha. Spotted by lodger.
33334 - Fix unit tests in 0.2.0.27-rc.
33335 - Fix compile on Windows.
33338 Changes in version 0.2.0.27-rc - 2008-06-03
33339 Tor 0.2.0.27-rc adds a few features we left out of the earlier
33340 release candidates. In particular, we now include an IP-to-country
33341 GeoIP database, so controllers can easily look up what country a
33342 given relay is in, and so bridge relays can give us some sanitized
33343 summaries about which countries are making use of bridges. (See proposal
33344 126-geoip-fetching.txt for details.)
33347 - Include an IP-to-country GeoIP file in the tarball, so bridge
33348 relays can report sanitized summaries of the usage they're seeing.
33351 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
33352 Robert Hogan. Fixes the first part of bug 681.
33353 - Make bridge authorities never serve extrainfo docs.
33354 - Add support to detect Libevent versions in the 1.4.x series
33356 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
33357 - Include a new contrib/tor-exit-notice.html file that exit relay
33358 operators can put on their website to help reduce abuse queries.
33361 - When tunneling an encrypted directory connection, and its first
33362 circuit fails, do not leave it unattached and ask the controller
33363 to deal. Fixes the second part of bug 681.
33364 - Make bridge authorities correctly expire old extrainfo documents
33368 Changes in version 0.2.0.26-rc - 2008-05-13
33369 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
33370 in Debian's OpenSSL packages. All users running any 0.2.0.x version
33371 should upgrade, whether they're running Debian or not.
33373 o Major security fixes:
33374 - Use new V3 directory authority keys on the tor26, gabelmoo, and
33375 moria1 V3 directory authorities. The old keys were generated with
33376 a vulnerable version of Debian's OpenSSL package, and must be
33377 considered compromised. Other authorities' keys were not generated
33378 with an affected version of OpenSSL.
33381 - List authority signatures as "unrecognized" based on DirServer
33382 lines, not on cert cache. Bugfix on 0.2.0.x.
33385 - Add a new V3AuthUseLegacyKey option to make it easier for
33386 authorities to change their identity keys if they have to.
33389 Changes in version 0.2.0.25-rc - 2008-04-23
33390 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
33393 - Remember to initialize threading before initializing logging.
33394 Otherwise, many BSD-family implementations will crash hard on
33395 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
33398 - Authorities correctly free policies on bad servers on
33399 exit. Fixes bug 672. Bugfix on 0.2.0.x.
33402 Changes in version 0.2.0.24-rc - 2008-04-22
33403 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
33404 v3 directory authority, makes relays with dynamic IP addresses and no
33405 DirPort notice more quickly when their IP address changes, fixes a few
33406 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
33408 o New directory authorities:
33409 - Take lefkada out of the list of v3 directory authorities, since
33410 it has been down for months.
33411 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
33415 - Detect address changes more quickly on non-directory mirror
33416 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
33418 o Minor features (security):
33419 - Reject requests for reverse-dns lookup of names that are in
33420 a private address space. Patch from lodger.
33421 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
33424 o Minor bugfixes (crashes):
33425 - Avoid a rare assert that can trigger when Tor doesn't have much
33426 directory information yet and it tries to fetch a v2 hidden
33427 service descriptor. Fixes bug 651, reported by nwf.
33428 - Initialize log mutex before initializing dmalloc. Otherwise,
33429 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
33430 - Use recursive pthread mutexes in order to avoid deadlock when
33431 logging debug-level messages to a controller. Bug spotted by nwf,
33432 bugfix on 0.2.0.16-alpha.
33434 o Minor bugfixes (resource management):
33435 - Keep address policies from leaking memory: start their refcount
33436 at 1, not 2. Bugfix on 0.2.0.16-alpha.
33437 - Free authority certificates on exit, so they don't look like memory
33438 leaks. Bugfix on 0.2.0.19-alpha.
33439 - Free static hashtables for policy maps and for TLS connections on
33440 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
33441 - Avoid allocating extra space when computing consensuses on 64-bit
33442 platforms. Bug spotted by aakova.
33444 o Minor bugfixes (misc):
33445 - Do not read the configuration file when we've only been told to
33446 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
33447 based on patch from Sebastian Hahn.
33448 - Exit relays that are used as a client can now reach themselves
33449 using the .exit notation, rather than just launching an infinite
33450 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
33451 - When attempting to open a logfile fails, tell us why.
33452 - Fix a dumb bug that was preventing us from knowing that we should
33453 preemptively build circuits to handle expected directory requests.
33454 Fixes bug 660. Bugfix on 0.1.2.x.
33455 - Warn less verbosely about clock skew from netinfo cells from
33456 untrusted sources. Fixes bug 663.
33457 - Make controller stream events for DNS requests more consistent,
33458 by adding "new stream" events for DNS requests, and removing
33459 spurious "stream closed" events" for cached reverse resolves.
33460 Patch from mwenge. Fixes bug 646.
33461 - Correctly notify one-hop connections when a circuit build has
33462 failed. Possible fix for bug 669. Found by lodger.
33465 Changes in version 0.2.0.23-rc - 2008-03-24
33466 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
33467 makes bootstrapping faster if the first directory mirror you contact
33468 is down. The bundles also include the new Vidalia 0.1.2 release.
33471 - When a tunneled directory request is made to a directory server
33472 that's down, notice after 30 seconds rather than 120 seconds. Also,
33473 fail any begindir streams that are pending on it, so they can
33474 retry elsewhere. This was causing multi-minute delays on bootstrap.
33477 Changes in version 0.2.0.22-rc - 2008-03-18
33478 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
33479 enables encrypted directory connections by default for non-relays, fixes
33480 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
33481 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
33484 - Enable encrypted directory connections by default for non-relays,
33485 so censor tools that block Tor directory connections based on their
33486 plaintext patterns will no longer work. This means Tor works in
33487 certain censored countries by default again.
33490 - Make sure servers always request certificates from clients during
33491 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
33492 - Do not enter a CPU-eating loop when a connection is closed in
33493 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
33494 diagnosed by lodger; bugfix on 0.2.0.20-rc.
33495 - Fix assertion failure that could occur when a blocked circuit
33496 became unblocked, and it had pending client DNS requests. Bugfix
33497 on 0.2.0.1-alpha. Fixes bug 632.
33499 o Minor bugfixes (on 0.1.2.x):
33500 - Generate "STATUS_SERVER" events rather than misspelled
33501 "STATUS_SEVER" events. Caught by mwenge.
33502 - When counting the number of bytes written on a TLS connection,
33503 look at the BIO actually used for writing to the network, not
33504 at the BIO used (sometimes) to buffer data for the network.
33505 Looking at different BIOs could result in write counts on the
33506 order of ULONG_MAX. Fixes bug 614.
33507 - On Windows, correctly detect errors when listing the contents of
33508 a directory. Fix from lodger.
33510 o Minor bugfixes (on 0.2.0.x):
33511 - Downgrade "sslv3 alert handshake failure" message to INFO.
33512 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
33513 left BandwidthRate and BandwidthBurst at the default, we would be
33514 silently limited by those defaults. Now raise them to match the
33515 RelayBandwidth* values.
33516 - Fix the SVK version detection logic to work correctly on a branch.
33517 - Make --enable-openbsd-malloc work correctly on Linux with alpha
33518 CPUs. Fixes bug 625.
33519 - Logging functions now check that the passed severity is sane.
33520 - Use proper log levels in the testsuite call of
33521 get_interface_address6().
33522 - When using a nonstandard malloc, do not use the platform values for
33523 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
33524 - Make the openbsd malloc code use 8k pages on alpha CPUs and
33526 - Detect mismatched page sizes when using --enable-openbsd-malloc.
33527 - Avoid double-marked-for-close warning when certain kinds of invalid
33528 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
33529 for bug 617. Bugfix on 0.2.0.1-alpha.
33530 - Make sure that the "NULL-means-reject *:*" convention is followed by
33531 all the policy manipulation functions, avoiding some possible crash
33532 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
33533 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
33534 actually works, and doesn't warn about every single reverse lookup.
33535 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
33538 - Only log guard node status when guard node status has changed.
33539 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
33540 make "INFO" 75% less verbose.
33543 Changes in version 0.2.0.21-rc - 2008-03-02
33544 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
33545 makes Tor work well with Vidalia again, fixes a rare assert bug,
33546 and fixes a pair of more minor bugs. The bundles also include Vidalia
33547 0.1.0 and Torbutton 1.1.16.
33550 - The control port should declare that it requires password auth
33551 when HashedControlSessionPassword is set too. Patch from Matt Edman;
33552 bugfix on 0.2.0.20-rc. Fixes bug 615.
33553 - Downgrade assert in connection_buckets_decrement() to a log message.
33554 This may help us solve bug 614, and in any case will make its
33555 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
33556 - We were sometimes miscounting the number of bytes read from the
33557 network, causing our rate limiting to not be followed exactly.
33558 Bugfix on 0.2.0.16-alpha. Reported by lodger.
33561 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
33562 OpenSSL versions should have been working fine. Diagnosis and patch
33563 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
33564 Bugfix on 0.2.0.20-rc.
33567 Changes in version 0.2.0.20-rc - 2008-02-24
33568 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
33569 makes more progress towards normalizing Tor's TLS handshake, makes
33570 hidden services work better again, helps relays bootstrap if they don't
33571 know their IP address, adds optional support for linking in openbsd's
33572 allocator or tcmalloc, allows really fast relays to scale past 15000
33573 sockets, and fixes a bunch of minor bugs reported by Veracode.
33576 - Enable the revised TLS handshake based on the one designed by
33577 Steven Murdoch in proposal 124, as revised in proposal 130. It
33578 includes version negotiation for OR connections as described in
33579 proposal 105. The new handshake is meant to be harder for censors
33580 to fingerprint, and it adds the ability to detect certain kinds of
33581 man-in-the-middle traffic analysis attacks. The version negotiation
33582 feature will allow us to improve Tor's link protocol more safely
33584 - Choose which bridge to use proportional to its advertised bandwidth,
33585 rather than uniformly at random. This should speed up Tor for
33586 bridge users. Also do this for people who set StrictEntryNodes.
33587 - When a TrackHostExits-chosen exit fails too many times in a row,
33588 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
33591 - Resolved problems with (re-)fetching hidden service descriptors.
33592 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
33593 and 0.2.0.19-alpha.
33594 - If we only ever used Tor for hidden service lookups or posts, we
33595 would stop building circuits and start refusing connections after
33596 24 hours, since we falsely believed that Tor was dormant. Reported
33597 by nwf; bugfix on 0.1.2.x.
33598 - Servers that don't know their own IP address should go to the
33599 authorities for their first directory fetch, even if their DirPort
33600 is off or if they don't know they're reachable yet. This will help
33601 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
33602 - When counting the number of open sockets, count not only the number
33603 of sockets we have received from the socket() call, but also
33604 the number we've gotten from accept() and socketpair(). This bug
33605 made us fail to count all sockets that we were using for incoming
33606 connections. Bugfix on 0.2.0.x.
33607 - Fix code used to find strings within buffers, when those strings
33608 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
33609 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
33610 - Add a new __HashedControlSessionPassword option for controllers
33611 to use for one-off session password hashes that shouldn't get
33612 saved to disk by SAVECONF --- Vidalia users were accumulating a
33613 pile of HashedControlPassword lines in their torrc files, one for
33614 each time they had restarted Tor and then clicked Save. Make Tor
33615 automatically convert "HashedControlPassword" to this new option but
33616 only when it's given on the command line. Partial fix for bug 586.
33618 o Minor features (performance):
33619 - Tune parameters for cell pool allocation to minimize amount of
33621 - Add OpenBSD malloc code from phk as an optional malloc
33622 replacement on Linux: some glibc libraries do very poorly
33623 with Tor's memory allocation patterns. Pass
33624 --enable-openbsd-malloc to get the replacement malloc code.
33625 - Add a --with-tcmalloc option to the configure script to link
33626 against tcmalloc (if present). Does not yet search for
33627 non-system include paths.
33628 - Stop imposing an arbitrary maximum on the number of file descriptors
33629 used for busy servers. Bug reported by Olaf Selke; patch from
33632 o Minor features (other):
33633 - When SafeLogging is disabled, log addresses along with all TLS
33635 - When building with --enable-gcc-warnings, check for whether Apple's
33636 warning "-Wshorten-64-to-32" is available.
33637 - Add a --passphrase-fd argument to the tor-gencert command for
33640 o Minor bugfixes (memory leaks and code problems):
33641 - We were leaking a file descriptor if Tor started with a zero-length
33642 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
33643 - Detect size overflow in zlib code. Reported by Justin Ferguson and
33645 - We were comparing the raw BridgePassword entry with a base64'ed
33646 version of it, when handling a "/tor/networkstatus-bridges"
33647 directory request. Now compare correctly. Noticed by Veracode.
33648 - Recover from bad tracked-since value in MTBF-history file.
33649 Should fix bug 537.
33650 - Alter the code that tries to recover from unhandled write
33651 errors, to not try to flush onto a socket that's given us
33652 unhandled errors. Bugfix on 0.1.2.x.
33653 - Make Unix controlsockets work correctly on OpenBSD. Patch from
33654 tup. Bugfix on 0.2.0.3-alpha.
33656 o Minor bugfixes (other):
33657 - If we have an extra-info document for our server, always make
33658 it available on the control port, even if we haven't gotten
33659 a copy of it from an authority yet. Patch from mwenge.
33660 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
33661 - Directory mirrors no longer include a guess at the client's IP
33662 address if the connection appears to be coming from the same /24
33663 network; it was producing too many wrong guesses.
33664 - Make the new hidden service code respect the SafeLogging setting.
33665 Bugfix on 0.2.0.x. Patch from Karsten.
33666 - When starting as an authority, do not overwrite all certificates
33667 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
33668 - If we're trying to flush the last bytes on a connection (for
33669 example, when answering a directory request), reset the
33670 time-to-give-up timeout every time we manage to write something
33671 on the socket. Bugfix on 0.1.2.x.
33672 - Change the behavior of "getinfo status/good-server-descriptor"
33673 so it doesn't return failure when any authority disappears.
33674 - Even though the man page said that "TrackHostExits ." should
33675 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
33676 - Report TLS "zero return" case as a "clean close" and "IO error"
33677 as a "close". Stop calling closes "unexpected closes": existing
33678 Tors don't use SSL_close(), so having a connection close without
33679 the TLS shutdown handshake is hardly unexpected.
33680 - Send NAMESERVER_STATUS messages for a single failed nameserver
33683 o Code simplifications and refactoring:
33684 - Remove the tor_strpartition function: its logic was confused,
33685 and it was only used for one thing that could be implemented far
33689 Changes in version 0.2.0.19-alpha - 2008-02-09
33690 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
33691 handshake, makes path selection for relays more secure and IP address
33692 guessing more robust, and generally fixes a lot of bugs in preparation
33693 for calling the 0.2.0 branch stable.
33696 - Do not include recognizeable strings in the commonname part of
33697 Tor's x509 certificates.
33700 - If we're a relay, avoid picking ourselves as an introduction point,
33701 a rendezvous point, or as the final hop for internal circuits. Bug
33702 reported by taranis and lodger. Bugfix on 0.1.2.x.
33703 - Patch from "Andrew S. Lists" to catch when we contact a directory
33704 mirror at IP address X and he says we look like we're coming from
33705 IP address X. Bugfix on 0.1.2.x.
33707 o Minor features (security):
33708 - Be more paranoid about overwriting sensitive memory on free(),
33709 as a defensive programming tactic to ensure forward secrecy.
33711 o Minor features (directory authority):
33712 - Actually validate the options passed to AuthDirReject,
33713 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
33714 - Reject router descriptors with out-of-range bandwidthcapacity or
33715 bandwidthburst values.
33717 o Minor features (controller):
33718 - Reject controller commands over 1MB in length. This keeps rogue
33719 processes from running us out of memory.
33721 o Minor features (misc):
33722 - Give more descriptive well-formedness errors for out-of-range
33723 hidden service descriptor/protocol versions.
33724 - Make memory debugging information describe more about history
33725 of cell allocation, so we can help reduce our memory use.
33727 o Deprecated features (controller):
33728 - The status/version/num-versioning and status/version/num-concurring
33729 GETINFO options are no longer useful in the v3 directory protocol:
33730 treat them as deprecated, and warn when they're used.
33733 - When our consensus networkstatus has been expired for a while, stop
33734 being willing to build circuits using it. Fixes bug 401. Bugfix
33736 - Directory caches now fetch certificates from all authorities
33737 listed in a networkstatus consensus, even when they do not
33738 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
33739 - When connecting to a bridge without specifying its key, insert
33740 the connection into the identity-to-connection map as soon as
33741 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
33742 - Detect versions of OS X where malloc_good_size() is present in the
33743 library but never actually declared. Resolves bug 587. Bugfix
33745 - Stop incorrectly truncating zlib responses to directory authority
33746 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
33747 - Stop recommending that every server operator send mail to tor-ops.
33748 Resolves bug 597. Bugfix on 0.1.2.x.
33749 - Don't trigger an assert if we start a directory authority with a
33750 private IP address (like 127.0.0.1).
33751 - Avoid possible failures when generating a directory with routers
33752 with over-long versions strings, or too many flags set. Bugfix
33754 - If an attempt to launch a DNS resolve request over the control
33755 port fails because we have overrun the limit on the number of
33756 connections, tell the controller that the request has failed.
33757 - Avoid using too little bandwidth when our clock skips a few
33758 seconds. Bugfix on 0.1.2.x.
33759 - Fix shell error when warning about missing packages in configure
33760 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
33761 - Do not become confused when receiving a spurious VERSIONS-like
33762 cell from a confused v1 client. Bugfix on 0.2.0.x.
33763 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
33764 introduction points for a hidden service have failed. Patch from
33765 Karsten Loesing. Bugfix on 0.2.0.x.
33767 o Code simplifications and refactoring:
33768 - Remove some needless generality from cpuworker code, for improved
33770 - Stop overloading the circuit_t.onionskin field for both "onionskin
33771 from a CREATE cell that we are waiting for a cpuworker to be
33772 assigned" and "onionskin from an EXTEND cell that we are going to
33773 send to an OR as soon as we are connected". Might help with bug 600.
33774 - Add an in-place version of aes_crypt() so that we can avoid doing a
33775 needless memcpy() call on each cell payload.
33778 Changes in version 0.2.0.18-alpha - 2008-01-25
33779 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
33780 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
33781 that can warn or reject connections to ports generally associated with
33782 vulnerable-plaintext protocols.
33784 o New directory authorities:
33785 - Set up dannenberg (run by CCC) as the sixth v3 directory
33789 - Fix a major memory leak when attempting to use the v2 TLS
33790 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
33791 - We accidentally enabled the under-development v2 TLS handshake
33792 code, which was causing log entries like "TLS error while
33793 renegotiating handshake". Disable it again. Resolves bug 590.
33794 - We were computing the wrong Content-Length: header for directory
33795 responses that need to be compressed on the fly, causing clients
33796 asking for those items to always fail. Bugfix on 0.2.0.x; partially
33800 - Avoid going directly to the directory authorities even if you're a
33801 relay, if you haven't found yourself reachable yet or if you've
33802 decided not to advertise your dirport yet. Addresses bug 556.
33803 - If we've gone 12 hours since our last bandwidth check, and we
33804 estimate we have less than 50KB bandwidth capacity but we could
33805 handle more, do another bandwidth test.
33806 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
33807 Tor can warn and/or refuse connections to ports commonly used with
33808 vulnerable-plaintext protocols. Currently we warn on ports 23,
33809 109, 110, and 143, but we don't reject any.
33812 - When we setconf ClientOnly to 1, close any current OR and Dir
33813 listeners. Reported by mwenge.
33814 - When we get a consensus that's been signed by more people than
33815 we expect, don't log about it; it's not a big deal. Reported
33819 - Don't answer "/tor/networkstatus-bridges" directory requests if
33820 the request isn't encrypted.
33821 - Make "ClientOnly 1" config option disable directory ports too.
33822 - Patches from Karsten Loesing to make v2 hidden services more
33823 robust: work even when there aren't enough HSDir relays available;
33824 retry when a v2 rend desc fetch fails; but don't retry if we
33825 already have a usable v0 rend desc.
33828 Changes in version 0.2.0.17-alpha - 2008-01-17
33829 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
33832 - Make the tor-gencert man page get included correctly in the tarball.
33835 Changes in version 0.2.0.16-alpha - 2008-01-17
33836 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
33837 Loesing, and generally cleans up a lot of features and minor bugs.
33839 o New directory authorities:
33840 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
33843 o Major performance improvements:
33844 - Switch our old ring buffer implementation for one more like that
33845 used by free Unix kernels. The wasted space in a buffer with 1mb
33846 of data will now be more like 8k than 1mb. The new implementation
33847 also avoids realloc();realloc(); patterns that can contribute to
33848 memory fragmentation.
33851 - Configuration files now accept C-style strings as values. This
33852 helps encode characters not allowed in the current configuration
33853 file format, such as newline or #. Addresses bug 557.
33854 - Although we fixed bug 539 (where servers would send HTTP status 503
33855 responses _and_ send a body too), there are still servers out
33856 there that haven't upgraded. Therefore, make clients parse such
33857 bodies when they receive them.
33858 - When we're not serving v2 directory information, there is no reason
33859 to actually keep any around. Remove the obsolete files and directory
33860 on startup if they are very old and we aren't going to serve them.
33862 o Minor performance improvements:
33863 - Reference-count and share copies of address policy entries; only 5%
33864 of them were actually distinct.
33865 - Never walk through the list of logs if we know that no log is
33866 interested in a given message.
33869 - When an authority has not signed a consensus, do not try to
33870 download a nonexistent "certificate with key 00000000". Bugfix
33871 on 0.2.0.x. Fixes bug 569.
33872 - Fix a rare assert error when we're closing one of our threads:
33873 use a mutex to protect the list of logs, so we never write to the
33874 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
33875 bug 575, which is kind of the revenge of bug 222.
33876 - Patch from Karsten Loesing to complain less at both the client
33877 and the relay when a relay used to have the HSDir flag but doesn't
33878 anymore, and we try to upload a hidden service descriptor.
33879 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
33881 - Do not try to download missing certificates until we have tried
33882 to check our fallback consensus. Fixes bug 583.
33883 - Make bridges round reported GeoIP stats info up to the nearest
33884 estimate, not down. Now we can distinguish between "0 people from
33885 this country" and "1 person from this country".
33886 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
33887 - Avoid possible segfault if key generation fails in
33888 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
33889 - Avoid segfault in the case where a badly behaved v2 versioning
33890 directory sends a signed networkstatus with missing client-versions.
33892 - Avoid segfaults on certain complex invocations of
33893 router_get_by_hexdigest(). Bugfix on 0.1.2.
33894 - Correct bad index on array access in parse_http_time(). Bugfix
33896 - Fix possible bug in vote generation when server versions are present
33897 but client versions are not.
33898 - Fix rare bug on REDIRECTSTREAM control command when called with no
33899 port set: it could erroneously report an error when none had
33901 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
33902 compressing large objects and find ourselves with more than 4k
33903 left over. Bugfix on 0.2.0.
33904 - Fix a small memory leak when setting up a hidden service.
33905 - Fix a few memory leaks that could in theory happen under bizarre
33907 - Fix an assert if we post a general-purpose descriptor via the
33908 control port but that descriptor isn't mentioned in our current
33909 network consensus. Bug reported by Jon McLachlan; bugfix on
33912 o Minor features (controller):
33913 - Get NS events working again. Patch from tup.
33914 - The GETCONF command now escapes and quotes configuration values
33915 that don't otherwise fit into the torrc file.
33916 - The SETCONF command now handles quoted values correctly.
33918 o Minor features (directory authorities):
33919 - New configuration options to override default maximum number of
33920 servers allowed on a single IP address. This is important for
33921 running a test network on a single host.
33922 - Actually implement the -s option to tor-gencert.
33923 - Add a manual page for tor-gencert.
33925 o Minor features (bridges):
33926 - Bridge authorities no longer serve bridge descriptors over
33927 unencrypted connections.
33929 o Minor features (other):
33930 - Add hidden services and DNSPorts to the list of things that make
33931 Tor accept that it has running ports. Change starting Tor with no
33932 ports from a fatal error to a warning; we might change it back if
33933 this turns out to confuse anybody. Fixes bug 579.
33936 Changes in version 0.1.2.19 - 2008-01-17
33937 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
33938 exit policy a little bit more conservative so it's safer to run an
33939 exit relay on a home system, and fixes a variety of smaller issues.
33942 - Exit policies now reject connections that are addressed to a
33943 relay's public (external) IP address too, unless
33944 ExitPolicyRejectPrivate is turned off. We do this because too
33945 many relays are running nearby to services that trust them based
33946 on network address.
33949 - When the clock jumps forward a lot, do not allow the bandwidth
33950 buckets to become negative. Fixes bug 544.
33951 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33952 on every successful resolve. Reported by Mike Perry.
33953 - Purge old entries from the "rephist" database and the hidden
33954 service descriptor database even when DirPort is zero.
33955 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33956 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33957 crashing or mis-answering these requests.
33958 - When we decide to send a 503 response to a request for servers, do
33959 not then also send the server descriptors: this defeats the whole
33960 purpose. Fixes bug 539.
33963 - Changing the ExitPolicyRejectPrivate setting should cause us to
33964 rebuild our server descriptor.
33965 - Fix handling of hex nicknames when answering controller requests for
33966 networkstatus by name, or when deciding whether to warn about
33967 unknown routers in a config option. (Patch from mwenge.)
33968 - Fix a couple of hard-to-trigger autoconf problems that could result
33969 in really weird results on platforms whose sys/types.h files define
33970 nonstandard integer types.
33971 - Don't try to create the datadir when running --verify-config or
33972 --hash-password. Resolves bug 540.
33973 - If we were having problems getting a particular descriptor from the
33974 directory caches, and then we learned about a new descriptor for
33975 that router, we weren't resetting our failure count. Reported
33977 - Although we fixed bug 539 (where servers would send HTTP status 503
33978 responses _and_ send a body too), there are still servers out there
33979 that haven't upgraded. Therefore, make clients parse such bodies
33980 when they receive them.
33981 - Run correctly on systems where rlim_t is larger than unsigned long.
33982 This includes some 64-bit systems.
33983 - Run correctly on platforms (like some versions of OS X 10.5) where
33984 the real limit for number of open files is OPEN_FILES, not rlim_max
33985 from getrlimit(RLIMIT_NOFILES).
33986 - Avoid a spurious free on base64 failure.
33987 - Avoid segfaults on certain complex invocations of
33988 router_get_by_hexdigest().
33989 - Fix rare bug on REDIRECTSTREAM control command when called with no
33990 port set: it could erroneously report an error when none had
33994 Changes in version 0.2.0.15-alpha - 2007-12-25
33995 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
33996 features added in 0.2.0.13-alpha.
33999 - Fix several remotely triggerable asserts based on DirPort requests
34000 for a v2 or v3 networkstatus object before we were prepared. This
34001 was particularly bad for 0.2.0.13 and later bridge relays, who
34002 would never have a v2 networkstatus and would thus always crash
34003 when used. Bugfixes on 0.2.0.x.
34004 - Estimate the v3 networkstatus size more accurately, rather than
34005 estimating it at zero bytes and giving it artificially high priority
34006 compared to other directory requests. Bugfix on 0.2.0.x.
34009 - Fix configure.in logic for cross-compilation.
34010 - When we load a bridge descriptor from the cache, and it was
34011 previously unreachable, mark it as retriable so we won't just
34012 ignore it. Also, try fetching a new copy immediately. Bugfixes
34014 - The bridge GeoIP stats were counting other relays, for example
34015 self-reachability and authority-reachability tests.
34018 - Support compilation to target iPhone; patch from cjacker huang.
34019 To build for iPhone, pass the --enable-iphone option to configure.
34022 Changes in version 0.2.0.14-alpha - 2007-12-23
34024 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
34025 without a datadirectory from a previous Tor install. Reported
34027 - Fix a crash when we fetch a descriptor that turns out to be
34028 unexpected (it used to be in our networkstatus when we started
34029 fetching it, but it isn't in our current networkstatus), and we
34030 aren't using bridges. Bugfix on 0.2.0.x.
34031 - Fix a crash when accessing hidden services: it would work the first
34032 time you use a given introduction point for your service, but
34033 on subsequent requests we'd be using garbage memory. Fixed by
34034 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
34035 - Fix a crash when we load a bridge descriptor from disk but we don't
34036 currently have a Bridge line for it in our torrc. Bugfix on
34040 - If bridge authorities set BridgePassword, they will serve a
34041 snapshot of known bridge routerstatuses from their DirPort to
34042 anybody who knows that password. Unset by default.
34045 - Make the unit tests build again.
34046 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
34047 - Make PublishServerDescriptor default to 1, so the default doesn't
34048 have to change as we invent new directory protocol versions.
34049 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
34050 be included unless sys/time.h is already included. Fixes
34051 bug 553. Bugfix on 0.2.0.x.
34052 - If we receive a general-purpose descriptor and then receive an
34053 identical bridge-purpose descriptor soon after, don't discard
34054 the next one as a duplicate.
34057 - If BridgeRelay is set to 1, then the default for
34058 PublishServerDescriptor is now "bridge" rather than "v2,v3".
34059 - If the user sets RelayBandwidthRate but doesn't set
34060 RelayBandwidthBurst, then make them equal rather than erroring out.
34063 Changes in version 0.2.0.13-alpha - 2007-12-21
34064 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
34065 Goodell, fixes many more bugs, and adds a lot of infrastructure for
34068 o New directory authorities:
34069 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
34073 - Only update guard status (usable / not usable) once we have
34074 enough directory information. This was causing us to always pick
34075 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
34076 causing us to discard all our guards on startup if we hadn't been
34077 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
34078 - Purge old entries from the "rephist" database and the hidden
34079 service descriptor databases even when DirPort is zero. Bugfix
34081 - We were ignoring our RelayBandwidthRate for the first 30 seconds
34082 after opening a circuit -- even a relayed circuit. Bugfix on
34084 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
34085 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
34086 crashing or mis-answering these types of requests.
34087 - Relays were publishing their server descriptor to v1 and v2
34088 directory authorities, but they didn't try publishing to v3-only
34089 authorities. Fix this; and also stop publishing to v1 authorities.
34091 - When we were reading router descriptors from cache, we were ignoring
34092 the annotations -- so for example we were reading in bridge-purpose
34093 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
34094 - When we decided to send a 503 response to a request for servers, we
34095 were then also sending the server descriptors: this defeats the
34096 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
34099 - Bridge relays now behave like clients with respect to time
34100 intervals for downloading new consensus documents -- otherwise they
34101 stand out. Bridge users now wait until the end of the interval,
34102 so their bridge relay will be sure to have a new consensus document.
34103 - Three new config options (AlternateDirAuthority,
34104 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
34105 user selectively replace the default directory authorities by type,
34106 rather than the all-or-nothing replacement that DirServer offers.
34107 - Tor can now be configured to read a GeoIP file from disk in one
34108 of two formats. This can be used by controllers to map IP addresses
34109 to countries. Eventually, it may support exit-by-country.
34110 - When possible, bridge relays remember which countries users
34111 are coming from, and report aggregate information in their
34112 extra-info documents, so that the bridge authorities can learn
34113 where Tor is blocked.
34114 - Bridge directory authorities now do reachability testing on the
34115 bridges they know. They provide router status summaries to the
34116 controller via "getinfo ns/purpose/bridge", and also dump summaries
34117 to a file periodically.
34118 - Stop fetching directory info so aggressively if your DirPort is
34119 on but your ORPort is off; stop fetching v2 dir info entirely.
34120 You can override these choices with the new FetchDirInfoEarly
34124 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
34125 consensus documents when there are too many relays at a single
34126 IP address. Now clear it in v2 network status documents too, and
34127 also clear it in routerinfo_t when the relay is no longer listed
34128 in the relevant networkstatus document.
34129 - Don't crash if we get an unexpected value for the
34130 PublishServerDescriptor config option. Reported by Matt Edman;
34131 bugfix on 0.2.0.9-alpha.
34132 - Our new v2 hidden service descriptor format allows descriptors
34133 that have no introduction points. But Tor crashed when we tried
34134 to build a descriptor with no intro points (and it would have
34135 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
34136 by Karsten Loesing.
34137 - Fix building with dmalloc 5.5.2 with glibc.
34138 - Reject uploaded descriptors and extrainfo documents if they're
34139 huge. Otherwise we'll cache them all over the network and it'll
34140 clog everything up. Reported by Aljosha Judmayer.
34141 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
34142 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
34143 - When the DANGEROUS_VERSION controller status event told us we're
34144 running an obsolete version, it used the string "OLD" to describe
34145 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
34146 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
34147 - If we can't expand our list of entry guards (e.g. because we're
34148 using bridges or we have StrictEntryNodes set), don't mark relays
34149 down when they fail a directory request. Otherwise we're too quick
34150 to mark all our entry points down. Bugfix on 0.1.2.x.
34151 - Fix handling of hex nicknames when answering controller requests for
34152 networkstatus by name, or when deciding whether to warn about unknown
34153 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
34154 - Fix a couple of hard-to-trigger autoconf problems that could result
34155 in really weird results on platforms whose sys/types.h files define
34156 nonstandard integer types. Bugfix on 0.1.2.x.
34157 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
34158 - Don't crash on name lookup when we have no current consensus. Fixes
34159 bug 538; bugfix on 0.2.0.x.
34160 - Only Tors that want to mirror the v2 directory info should
34161 create the "cached-status" directory in their datadir. (All Tors
34162 used to create it.) Bugfix on 0.2.0.9-alpha.
34163 - Directory authorities should only automatically download Extra Info
34164 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
34167 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
34168 consumers. (We already do this on HUP.)
34169 - Authorities and caches fetch the v2 networkstatus documents
34170 less often, now that v3 is encouraged.
34171 - Add a new config option BridgeRelay that specifies you want to
34172 be a bridge relay. Right now the only difference is that it makes
34173 you answer begin_dir requests, and it makes you cache dir info,
34174 even if your DirPort isn't on.
34175 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
34176 ask about source, timestamp of arrival, purpose, etc. We need
34177 something like this to help Vidalia not do GeoIP lookups on bridge
34179 - Allow multiple HashedControlPassword config lines, to support
34180 multiple controller passwords.
34181 - Authorities now decide whether they're authoritative for a given
34182 router based on the router's purpose.
34183 - New config options AuthDirBadDir and AuthDirListBadDirs for
34184 authorities to mark certain relays as "bad directories" in the
34185 networkstatus documents. Also supports the "!baddir" directive in
34186 the approved-routers file.
34189 Changes in version 0.2.0.12-alpha - 2007-11-16
34190 This twelfth development snapshot fixes some more build problems as
34191 well as a few minor bugs.
34194 - Make it build on OpenBSD again. Patch from tup.
34195 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
34196 package-building for Red Hat, OS X, etc.
34198 o Minor bugfixes (on 0.1.2.x):
34199 - Changing the ExitPolicyRejectPrivate setting should cause us to
34200 rebuild our server descriptor.
34202 o Minor bugfixes (on 0.2.0.x):
34203 - When we're lacking a consensus, don't try to perform rendezvous
34204 operations. Reported by Karsten Loesing.
34205 - Fix a small memory leak whenever we decide against using a
34206 newly picked entry guard. Reported by Mike Perry.
34207 - When authorities detected more than two relays running on the same
34208 IP address, they were clearing all the status flags but forgetting
34209 to clear the "hsdir" flag. So clients were being told that a
34210 given relay was the right choice for a v2 hsdir lookup, yet they
34211 never had its descriptor because it was marked as 'not running'
34213 - If we're trying to fetch a bridge descriptor and there's no way
34214 the bridge authority could help us (for example, we don't know
34215 a digest, or there is no bridge authority), don't be so eager to
34216 fall back to asking the bridge authority.
34217 - If we're using bridges or have strictentrynodes set, and our
34218 chosen exit is in the same family as all our bridges/entry guards,
34219 then be flexible about families.
34222 - When we negotiate a v2 link-layer connection (not yet implemented),
34223 accept RELAY_EARLY cells and turn them into RELAY cells if we've
34224 negotiated a v1 connection for their next step. Initial code for
34228 Changes in version 0.2.0.11-alpha - 2007-11-12
34229 This eleventh development snapshot fixes some build problems with
34230 the previous snapshot. It also includes a more secure-by-default exit
34231 policy for relays, fixes an enormous memory leak for exit relays, and
34232 fixes another bug where servers were falling out of the directory list.
34235 - Exit policies now reject connections that are addressed to a
34236 relay's public (external) IP address too, unless
34237 ExitPolicyRejectPrivate is turned off. We do this because too
34238 many relays are running nearby to services that trust them based
34239 on network address. Bugfix on 0.1.2.x.
34242 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
34243 on every successful resolve. Reported by Mike Perry; bugfix
34245 - On authorities, never downgrade to old router descriptors simply
34246 because they're listed in the consensus. This created a catch-22
34247 where we wouldn't list a new descriptor because there was an
34248 old one in the consensus, and we couldn't get the new one in the
34249 consensus because we wouldn't list it. Possible fix for bug 548.
34250 Also, this might cause bug 543 to appear on authorities; if so,
34251 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
34253 o Packaging fixes on 0.2.0.10-alpha:
34254 - We were including instructions about what to do with the
34255 src/config/fallback-consensus file, but we weren't actually
34256 including it in the tarball. Disable all of that for now.
34259 - Allow people to say PreferTunnelledDirConns rather than
34260 PreferTunneledDirConns, for those alternate-spellers out there.
34263 - Don't reevaluate all the information from our consensus document
34264 just because we've downloaded a v2 networkstatus that we intend
34265 to cache. Fixes bug 545; bugfix on 0.2.0.x.
34268 Changes in version 0.2.0.10-alpha - 2007-11-10
34269 This tenth development snapshot adds a third v3 directory authority
34270 run by Mike Perry, adds most of Karsten Loesing's new hidden service
34271 descriptor format, fixes a bad crash bug and new bridge bugs introduced
34272 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
34273 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
34274 addresses many more minor issues.
34276 o New directory authorities:
34277 - Set up ides (run by Mike Perry) as the third v3 directory authority.
34280 - Allow tunnelled directory connections to ask for an encrypted
34281 "begin_dir" connection or an anonymized "uses a full Tor circuit"
34282 connection independently. Now we can make anonymized begin_dir
34283 connections for (e.g.) more secure hidden service posting and
34285 - More progress on proposal 114: code from Karsten Loesing to
34286 implement new hidden service descriptor format.
34287 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
34288 accommodate the growing number of servers that use the default
34289 and are reaching it.
34290 - Directory authorities use a new formula for selecting which nodes
34291 to advertise as Guards: they must be in the top 7/8 in terms of
34292 how long we have known about them, and above the median of those
34293 nodes in terms of weighted fractional uptime.
34294 - Make "not enough dir info yet" warnings describe *why* Tor feels
34295 it doesn't have enough directory info yet.
34298 - Stop servers from crashing if they set a Family option (or
34299 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
34301 - Make bridge users work again -- the move to v3 directories in
34302 0.2.0.9-alpha had introduced a number of bugs that made bridges
34303 no longer work for clients.
34304 - When the clock jumps forward a lot, do not allow the bandwidth
34305 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
34307 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
34308 - When the consensus lists a router descriptor that we previously were
34309 mirroring, but that we considered non-canonical, reload the
34310 descriptor as canonical. This fixes bug 543 where Tor servers
34311 would start complaining after a few days that they don't have
34312 enough directory information to build a circuit.
34313 - Consider replacing the current consensus when certificates arrive
34314 that make the pending consensus valid. Previously, we were only
34315 considering replacement when the new certs _didn't_ help.
34316 - Fix an assert error on startup if we didn't already have the
34317 consensus and certs cached in our datadirectory: we were caching
34318 the consensus in consensus_waiting_for_certs but then free'ing it
34320 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
34321 Request) if we need more v3 certs but we've already got pending
34322 requests for all of them.
34323 - Correctly back off from failing certificate downloads. Fixes
34325 - Authorities don't vote on the Running flag if they have been running
34326 for less than 30 minutes themselves. Fixes bug 547, where a newly
34327 started authority would vote that everyone was down.
34329 o New requirements:
34330 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
34331 it, it had no AES, and it hasn't seen any security patches since
34335 - Clients now hold circuitless TLS connections open for 1.5 times
34336 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
34337 rebuild a new circuit over them within that timeframe. Previously,
34338 they held them open only for KeepalivePeriod (5 minutes).
34339 - Use "If-Modified-Since" to avoid retrieving consensus
34340 networkstatuses that we already have.
34341 - When we have no consensus, check FallbackNetworkstatusFile (defaults
34342 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
34343 we start knowing some directory caches.
34344 - When we receive a consensus from the future, warn about skew.
34345 - Improve skew reporting: try to give the user a better log message
34346 about how skewed they are, and how much this matters.
34347 - When we have a certificate for an authority, believe that
34348 certificate's claims about the authority's IP address.
34349 - New --quiet command-line option to suppress the default console log.
34350 Good in combination with --hash-password.
34351 - Authorities send back an X-Descriptor-Not-New header in response to
34352 an accepted-but-discarded descriptor upload. Partially implements
34354 - Make the log message for "tls error. breaking." more useful.
34355 - Better log messages about certificate downloads, to attempt to
34356 track down the second incarnation of bug 546.
34358 o Minor features (bridges):
34359 - If bridge users set UpdateBridgesFromAuthority, but the digest
34360 they ask for is a 404 from the bridge authority, they now fall
34361 back to trying the bridge directly.
34362 - Bridges now use begin_dir to publish their server descriptor to
34363 the bridge authority, even when they haven't set TunnelDirConns.
34365 o Minor features (controller):
34366 - When reporting clock skew, and we know that the clock is _at least
34367 as skewed_ as some value, but we don't know the actual value,
34368 report the value as a "minimum skew."
34371 - Update linux-tor-prio.sh script to allow QoS based on the uid of
34372 the Tor process. Patch from Marco Bonetti with tweaks from Mike
34376 - Refuse to start if both ORPort and UseBridges are set. Bugfix
34377 on 0.2.0.x, suggested by Matt Edman.
34378 - Don't stop fetching descriptors when FetchUselessDescriptors is
34379 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
34380 reported by tup and ioerror.
34381 - Better log message on vote from unknown authority.
34382 - Don't log "Launching 0 request for 0 router" message.
34384 o Minor bugfixes (memory leaks):
34385 - Stop leaking memory every time we parse a v3 certificate. Bugfix
34387 - Stop leaking memory every time we load a v3 certificate. Bugfix
34388 on 0.2.0.1-alpha. Fixes bug 536.
34389 - Stop leaking a cached networkstatus on exit. Bugfix on
34391 - Stop leaking voter information every time we free a consensus.
34392 Bugfix on 0.2.0.3-alpha.
34393 - Stop leaking signed data every time we check a voter signature.
34394 Bugfix on 0.2.0.3-alpha.
34395 - Stop leaking a signature every time we fail to parse a consensus or
34396 a vote. Bugfix on 0.2.0.3-alpha.
34397 - Stop leaking v2_download_status_map on shutdown. Bugfix on
34399 - Stop leaking conn->nickname every time we make a connection to a
34400 Tor relay without knowing its expected identity digest (e.g. when
34401 using bridges). Bugfix on 0.2.0.3-alpha.
34403 - Minor bugfixes (portability):
34404 - Run correctly on platforms where rlim_t is larger than unsigned
34405 long, and/or where the real limit for number of open files is
34406 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
34407 particular, these may be needed for OS X 10.5.
34410 Changes in version 0.1.2.18 - 2007-10-28
34411 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
34412 hidden service introduction that were causing huge delays, and a big
34413 bug that was causing some servers to disappear from the network status
34414 lists for a few hours each day.
34416 o Major bugfixes (crashes):
34417 - If a connection is shut down abruptly because of something that
34418 happened inside connection_flushed_some(), do not call
34419 connection_finished_flushing(). Should fix bug 451:
34420 "connection_stop_writing: Assertion conn->write_event failed"
34421 Bugfix on 0.1.2.7-alpha.
34422 - Fix possible segfaults in functions called from
34423 rend_process_relay_cell().
34425 o Major bugfixes (hidden services):
34426 - Hidden services were choosing introduction points uniquely by
34427 hexdigest, but when constructing the hidden service descriptor
34428 they merely wrote the (potentially ambiguous) nickname.
34429 - Clients now use the v2 intro format for hidden service
34430 connections: they specify their chosen rendezvous point by identity
34431 digest rather than by (potentially ambiguous) nickname. These
34432 changes could speed up hidden service connections dramatically.
34434 o Major bugfixes (other):
34435 - Stop publishing a new server descriptor just because we get a
34436 HUP signal. This led (in a roundabout way) to some servers getting
34437 dropped from the networkstatus lists for a few hours each day.
34438 - When looking for a circuit to cannibalize, consider family as well
34439 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34440 circuit cannibalization).
34441 - When a router wasn't listed in a new networkstatus, we were leaving
34442 the flags for that router alone -- meaning it remained Named,
34443 Running, etc -- even though absence from the networkstatus means
34444 that it shouldn't be considered to exist at all anymore. Now we
34445 clear all the flags for routers that fall out of the networkstatus
34446 consensus. Fixes bug 529.
34449 - Don't try to access (or alter) the state file when running
34450 --list-fingerprint or --verify-config or --hash-password. Resolves
34452 - When generating information telling us how to extend to a given
34453 router, do not try to include the nickname if it is
34454 absent. Resolves bug 467.
34455 - Fix a user-triggerable segfault in expand_filename(). (There isn't
34456 a way to trigger this remotely.)
34457 - When sending a status event to the controller telling it that an
34458 OR address is reachable, set the port correctly. (Previously we
34459 were reporting the dir port.)
34460 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34461 command. Bugfix on 0.1.2.17.
34462 - When loading bandwidth history, do not believe any information in
34463 the future. Fixes bug 434.
34464 - When loading entry guard information, do not believe any information
34466 - When we have our clock set far in the future and generate an
34467 onion key, then re-set our clock to be correct, we should not stop
34468 the onion key from getting rotated.
34469 - On some platforms, accept() can return a broken address. Detect
34470 this more quietly, and deal accordingly. Fixes bug 483.
34471 - It's not actually an error to find a non-pending entry in the DNS
34472 cache when canceling a pending resolve. Don't log unless stuff
34473 is fishy. Resolves bug 463.
34474 - Don't reset trusted dir server list when we set a configuration
34475 option. Patch from Robert Hogan.
34476 - Don't try to create the datadir when running --verify-config or
34477 --hash-password. Resolves bug 540.
34480 Changes in version 0.2.0.9-alpha - 2007-10-24
34481 This ninth development snapshot switches clients to the new v3 directory
34482 system; allows servers to be listed in the network status even when they
34483 have the same nickname as a registered server; and fixes many other
34484 bugs including a big one that was causing some servers to disappear
34485 from the network status lists for a few hours each day.
34487 o Major features (directory system):
34488 - Clients now download v3 consensus networkstatus documents instead
34489 of v2 networkstatus documents. Clients and caches now base their
34490 opinions about routers on these consensus documents. Clients only
34491 download router descriptors listed in the consensus.
34492 - Authorities now list servers who have the same nickname as
34493 a different named server, but list them with a new flag,
34494 "Unnamed". Now we can list servers that happen to pick the same
34495 nickname as a server that registered two years ago and then
34496 disappeared. Partially implements proposal 122.
34497 - If the consensus lists a router as "Unnamed", the name is assigned
34498 to a different router: do not identify the router by that name.
34499 Partially implements proposal 122.
34500 - Authorities can now come to a consensus on which method to use to
34501 compute the consensus. This gives us forward compatibility.
34504 - Stop publishing a new server descriptor just because we HUP or
34505 when we find our DirPort to be reachable but won't actually publish
34506 it. New descriptors without any real changes are dropped by the
34507 authorities, and can screw up our "publish every 18 hours" schedule.
34509 - When a router wasn't listed in a new networkstatus, we were leaving
34510 the flags for that router alone -- meaning it remained Named,
34511 Running, etc -- even though absence from the networkstatus means
34512 that it shouldn't be considered to exist at all anymore. Now we
34513 clear all the flags for routers that fall out of the networkstatus
34514 consensus. Fixes bug 529; bugfix on 0.1.2.x.
34515 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
34516 extrainfo documents and then discard them immediately for not
34517 matching the latest router. Bugfix on 0.2.0.1-alpha.
34519 o Minor features (v3 directory protocol):
34520 - Allow tor-gencert to generate a new certificate without replacing
34522 - Allow certificates to include an address.
34523 - When we change our directory-cache settings, reschedule all voting
34524 and download operations.
34525 - Reattempt certificate downloads immediately on failure, as long as
34526 we haven't failed a threshold number of times yet.
34527 - Delay retrying consensus downloads while we're downloading
34528 certificates to verify the one we just got. Also, count getting a
34529 consensus that we already have (or one that isn't valid) as a failure,
34530 and count failing to get the certificates after 20 minutes as a
34532 - Build circuits and download descriptors even if our consensus is a
34533 little expired. (This feature will go away once authorities are
34536 o Minor features (router descriptor cache):
34537 - If we find a cached-routers file that's been sitting around for more
34538 than 28 days unmodified, then most likely it's a leftover from
34539 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
34541 - When we (as a cache) download a descriptor because it was listed
34542 in a consensus, remember when the consensus was supposed to expire,
34543 and don't expire the descriptor until then.
34545 o Minor features (performance):
34546 - Call routerlist_remove_old_routers() much less often. This should
34547 speed startup, especially on directory caches.
34548 - Don't try to launch new descriptor downloads quite so often when we
34549 already have enough directory information to build circuits.
34550 - Base64 decoding was actually showing up on our profile when parsing
34551 the initial descriptor file; switch to an in-process all-at-once
34552 implementation that's about 3.5x times faster than calling out to
34555 o Minor features (compilation):
34556 - Detect non-ASCII platforms (if any still exist) and refuse to
34557 build there: some of our code assumes that 'A' is 65 and so on.
34559 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
34560 - Make the "next period" votes into "current period" votes immediately
34561 after publishing the consensus; avoid a heisenbug that made them
34562 stick around indefinitely.
34563 - When we discard a vote as a duplicate, do not report this as
34565 - Treat missing v3 keys or certificates as an error when running as a
34566 v3 directory authority.
34567 - When we're configured to be a v3 authority, but we're only listed
34568 as a non-v3 authority in our DirServer line for ourself, correct
34570 - If an authority doesn't have a qualified hostname, just put
34571 its address in the vote. This fixes the problem where we referred to
34572 "moria on moria:9031."
34573 - Distinguish between detached signatures for the wrong period, and
34574 detached signatures for a divergent vote.
34575 - Fix a small memory leak when computing a consensus.
34576 - When there's no consensus, we were forming a vote every 30
34577 minutes, but writing the "valid-after" line in our vote based
34578 on our configured V3AuthVotingInterval: so unless the intervals
34579 matched up, we immediately rejected our own vote because it didn't
34580 start at the voting interval that caused us to construct a vote.
34582 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
34583 - Delete unverified-consensus when the real consensus is set.
34584 - Consider retrying a consensus networkstatus fetch immediately
34585 after one fails: don't wait 60 seconds to notice.
34586 - When fetching a consensus as a cache, wait until a newer consensus
34587 should exist before trying to replace the current one.
34588 - Use a more forgiving schedule for retrying failed consensus
34589 downloads than for other types.
34591 o Minor bugfixes (other directory issues):
34592 - Correct the implementation of "download votes by digest." Bugfix on
34594 - Authorities no longer send back "400 you're unreachable please fix
34595 it" errors to Tor servers that aren't online all the time. We're
34596 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
34598 o Minor bugfixes (controller):
34599 - Don't reset trusted dir server list when we set a configuration
34600 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
34601 - Respond to INT and TERM SIGNAL commands before we execute the
34602 signal, in case the signal shuts us down. We had a patch in
34603 0.1.2.1-alpha that tried to do this by queueing the response on
34604 the connection's buffer before shutting down, but that really
34605 isn't the same thing at all. Bug located by Matt Edman.
34607 o Minor bugfixes (misc):
34608 - Correctly check for bad options to the "PublishServerDescriptor"
34609 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
34610 - Stop leaking memory on failing case of base32_decode, and make
34611 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
34612 - Don't try to download extrainfo documents when we're trying to
34613 fetch enough directory info to build a circuit: having enough
34614 info should get priority. Bugfix on 0.2.0.x.
34615 - Don't complain that "your server has not managed to confirm that its
34616 ports are reachable" if we haven't been able to build any circuits
34617 yet. Bug found by spending four hours without a v3 consensus. Bugfix
34619 - Detect the reason for failing to mmap a descriptor file we just
34620 wrote, and give a more useful log message. Fixes bug 533. Bugfix
34623 o Code simplifications and refactoring:
34624 - Remove support for the old bw_accounting file: we've been storing
34625 bandwidth accounting information in the state file since
34626 0.1.2.5-alpha. This may result in bandwidth accounting errors
34627 if you try to upgrade from 0.1.1.x or earlier, or if you try to
34628 downgrade to 0.1.1.x or earlier.
34629 - New convenience code to locate a file within the DataDirectory.
34630 - Move non-authority functionality out of dirvote.c.
34631 - Refactor the arguments for router_pick_{directory_|trusteddir}server
34632 so that they all take the same named flags.
34635 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
34636 Unix users an easy way to script their Tor process (e.g. by
34637 adjusting bandwidth based on the time of the day).
34640 Changes in version 0.2.0.8-alpha - 2007-10-12
34641 This eighth development snapshot fixes a crash bug that's been bothering
34642 us since February 2007, lets bridge authorities store a list of bridge
34643 descriptors they've seen, gets v3 directory voting closer to working,
34644 starts caching v3 directory consensus documents on directory mirrors,
34645 and fixes a variety of smaller issues including some minor memory leaks.
34647 o Major features (router descriptor cache):
34648 - Store routers in a file called cached-descriptors instead of in
34649 cached-routers. Initialize cached-descriptors from cached-routers
34650 if the old format is around. The new format allows us to store
34651 annotations along with descriptors.
34652 - Use annotations to record the time we received each descriptor, its
34653 source, and its purpose.
34654 - Disable the SETROUTERPURPOSE controller command: it is now
34656 - Controllers should now specify cache=no or cache=yes when using
34657 the +POSTDESCRIPTOR command.
34658 - Bridge authorities now write bridge descriptors to disk, meaning
34659 we can export them to other programs and begin distributing them
34662 o Major features (directory authorities):
34663 - When a v3 authority is missing votes or signatures, it now tries
34665 - Directory authorities track weighted fractional uptime as well as
34666 weighted mean-time-between failures. WFU is suitable for deciding
34667 whether a node is "usually up", while MTBF is suitable for deciding
34668 whether a node is "likely to stay up." We need both, because
34669 "usually up" is a good requirement for guards, while "likely to
34670 stay up" is a good requirement for long-lived connections.
34672 o Major features (v3 directory system):
34673 - Caches now download v3 network status documents as needed,
34674 and download the descriptors listed in them.
34675 - All hosts now attempt to download and keep fresh v3 authority
34676 certificates, and re-attempt after failures.
34677 - More internal-consistency checks for vote parsing.
34679 o Major bugfixes (crashes):
34680 - If a connection is shut down abruptly because of something that
34681 happened inside connection_flushed_some(), do not call
34682 connection_finished_flushing(). Should fix bug 451. Bugfix on
34685 o Major bugfixes (performance):
34686 - Fix really bad O(n^2) performance when parsing a long list of
34687 routers: Instead of searching the entire list for an "extra-info "
34688 string which usually wasn't there, once for every routerinfo
34689 we read, just scan lines forward until we find one we like.
34691 - When we add data to a write buffer in response to the data on that
34692 write buffer getting low because of a flush, do not consider the
34693 newly added data as a candidate for immediate flushing, but rather
34694 make it wait until the next round of writing. Otherwise, we flush
34695 and refill recursively, and a single greedy TLS connection can
34696 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
34698 o Minor features (v3 authority system):
34699 - Add more ways for tools to download the votes that lead to the
34701 - Send a 503 when low on bandwidth and a vote, consensus, or
34702 certificate is requested.
34703 - If-modified-since is now implemented properly for all kinds of
34704 certificate requests.
34706 o Minor bugfixes (network statuses):
34707 - Tweak the implementation of proposal 109 slightly: allow at most
34708 two Tor servers on the same IP address, except if it's the location
34709 of a directory authority, in which case allow five. Bugfix on
34712 o Minor bugfixes (controller):
34713 - When sending a status event to the controller telling it that an
34714 OR address is reachable, set the port correctly. (Previously we
34715 were reporting the dir port.) Bugfix on 0.1.2.x.
34717 o Minor bugfixes (v3 directory system):
34718 - Fix logic to look up a cert by its signing key digest. Bugfix on
34720 - Only change the reply to a vote to "OK" if it's not already
34721 set. This gets rid of annoying "400 OK" log messages, which may
34722 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
34723 - When we get a valid consensus, recompute the voting schedule.
34724 - Base the valid-after time of a vote on the consensus voting
34725 schedule, not on our preferred schedule.
34726 - Make the return values and messages from signature uploads and
34727 downloads more sensible.
34728 - Fix a memory leak when serving votes and consensus documents, and
34729 another when serving certificates.
34731 o Minor bugfixes (performance):
34732 - Use a slightly simpler string hashing algorithm (copying Python's
34733 instead of Java's) and optimize our digest hashing algorithm to take
34734 advantage of 64-bit platforms and to remove some possibly-costly
34736 - Fix a minor memory leak whenever we parse guards from our state
34737 file. Bugfix on 0.2.0.7-alpha.
34738 - Fix a minor memory leak whenever we write out a file. Bugfix on
34740 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34741 command. Bugfix on 0.2.0.5-alpha.
34743 o Minor bugfixes (portability):
34744 - On some platforms, accept() can return a broken address. Detect
34745 this more quietly, and deal accordingly. Fixes bug 483.
34746 - Stop calling tor_strlower() on uninitialized memory in some cases.
34747 Bugfix in 0.2.0.7-alpha.
34749 o Minor bugfixes (usability):
34750 - Treat some 403 responses from directory servers as INFO rather than
34751 WARN-severity events.
34752 - It's not actually an error to find a non-pending entry in the DNS
34753 cache when canceling a pending resolve. Don't log unless stuff is
34754 fishy. Resolves bug 463.
34756 o Minor bugfixes (anonymity):
34757 - Never report that we've used more bandwidth than we're willing to
34758 relay: it leaks how much non-relay traffic we're using. Resolves
34760 - When looking for a circuit to cannibalize, consider family as well
34761 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34762 circuit cannibalization).
34764 o Code simplifications and refactoring:
34765 - Make a bunch of functions static. Remove some dead code.
34766 - Pull out about a third of the really big routerlist.c; put it in a
34767 new module, networkstatus.c.
34768 - Merge the extra fields in local_routerstatus_t back into
34769 routerstatus_t: we used to need one routerstatus_t for each
34770 authority's opinion, plus a local_routerstatus_t for the locally
34771 computed consensus opinion. To save space, we put the locally
34772 modified fields into local_routerstatus_t, and only the common
34773 stuff into routerstatus_t. But once v3 directories are in use,
34774 clients and caches will no longer need to hold authority opinions;
34775 thus, the rationale for keeping the types separate is now gone.
34776 - Make the code used to reschedule and reattempt downloads more
34778 - Turn all 'Are we a directory server/mirror?' logic into a call to
34780 - Remove the code to generate the oldest (v1) directory format.
34781 The code has been disabled since 0.2.0.5-alpha.
34784 Changes in version 0.2.0.7-alpha - 2007-09-21
34785 This seventh development snapshot makes bridges work again, makes bridge
34786 authorities work for the first time, fixes two huge performance flaws
34787 in hidden services, and fixes a variety of minor issues.
34789 o New directory authorities:
34790 - Set up moria1 and tor26 as the first v3 directory authorities. See
34791 doc/spec/dir-spec.txt for details on the new directory design.
34793 o Major bugfixes (crashes):
34794 - Fix possible segfaults in functions called from
34795 rend_process_relay_cell(). Bugfix on 0.1.2.x.
34797 o Major bugfixes (bridges):
34798 - Fix a bug that made servers send a "404 Not found" in response to
34799 attempts to fetch their server descriptor. This caused Tor servers
34800 to take many minutes to establish reachability for their DirPort,
34801 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
34802 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
34803 users configure that and specify a bridge with an identity
34804 fingerprint, now they will lookup the bridge descriptor at the
34805 default bridge authority via a one-hop tunnel, but once circuits
34806 are established they will switch to a three-hop tunnel for later
34807 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
34809 o Major bugfixes (hidden services):
34810 - Hidden services were choosing introduction points uniquely by
34811 hexdigest, but when constructing the hidden service descriptor
34812 they merely wrote the (potentially ambiguous) nickname.
34813 - Clients now use the v2 intro format for hidden service
34814 connections: they specify their chosen rendezvous point by identity
34815 digest rather than by (potentially ambiguous) nickname. Both
34816 are bugfixes on 0.1.2.x, and they could speed up hidden service
34817 connections dramatically. Thanks to Karsten Loesing.
34819 o Minor features (security):
34820 - As a client, do not believe any server that tells us that an
34821 address maps to an internal address space.
34822 - Make it possible to enable HashedControlPassword and
34823 CookieAuthentication at the same time.
34825 o Minor features (guard nodes):
34826 - Tag every guard node in our state file with the version that
34827 we believe added it, or with our own version if we add it. This way,
34828 if a user temporarily runs an old version of Tor and then switches
34829 back to a new one, she doesn't automatically lose her guards.
34831 o Minor features (speed):
34832 - When implementing AES counter mode, update only the portions of the
34833 counter buffer that need to change, and don't keep separate
34834 network-order and host-order counters when they are the same (i.e.,
34835 on big-endian hosts.)
34837 o Minor features (controller):
34838 - Accept LF instead of CRLF on controller, since some software has a
34839 hard time generating real Internet newlines.
34840 - Add GETINFO values for the server status events
34841 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
34844 o Removed features:
34845 - Routers no longer include bandwidth-history lines in their
34846 descriptors; this information is already available in extra-info
34847 documents, and including it in router descriptors took up 60%
34848 (!) of compressed router descriptor downloads. Completes
34849 implementation of proposal 104.
34850 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
34851 and TorControl.py, as they use the old v0 controller protocol,
34852 and are obsoleted by TorFlow anyway.
34853 - Drop support for v1 rendezvous descriptors, since we never used
34854 them anyway, and the code has probably rotted by now. Based on
34855 patch from Karsten Loesing.
34856 - On OSX, stop warning the user that kqueue support in libevent is
34857 "experimental", since it seems to have worked fine for ages.
34860 - When generating information telling us how to extend to a given
34861 router, do not try to include the nickname if it is absent. Fixes
34862 bug 467. Bugfix on 0.2.0.3-alpha.
34863 - Fix a user-triggerable (but not remotely-triggerable) segfault
34864 in expand_filename(). Bugfix on 0.1.2.x.
34865 - Fix a memory leak when freeing incomplete requests from DNSPort.
34866 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
34867 - Don't try to access (or alter) the state file when running
34868 --list-fingerprint or --verify-config or --hash-password. (Resolves
34869 bug 499.) Bugfix on 0.1.2.x.
34870 - Servers used to decline to publish their DirPort if their
34871 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
34872 were below a threshold. Now they only look at BandwidthRate and
34873 RelayBandwidthRate. Bugfix on 0.1.2.x.
34874 - Remove an optimization in the AES counter-mode code that assumed
34875 that the counter never exceeded 2^68. When the counter can be set
34876 arbitrarily as an IV (as it is by Karsten's new hidden services
34877 code), this assumption no longer holds. Bugfix on 0.1.2.x.
34878 - Resume listing "AUTHORITY" flag for authorities in network status.
34879 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
34881 o Code simplifications and refactoring:
34882 - Revamp file-writing logic so we don't need to have the entire
34883 contents of a file in memory at once before we write to disk. Tor,
34885 - Turn "descriptor store" into a full-fledged type.
34886 - Move all NT services code into a separate source file.
34887 - Unify all code that computes medians, percentile elements, etc.
34888 - Get rid of a needless malloc when parsing address policies.
34891 Changes in version 0.1.2.17 - 2007-08-30
34892 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
34893 X bundles. Vidalia 0.0.14 makes authentication required for the
34894 ControlPort in the default configuration, which addresses important
34895 security risks. Everybody who uses Vidalia (or another controller)
34898 In addition, this Tor update fixes major load balancing problems with
34899 path selection, which should speed things up a lot once many people
34902 o Major bugfixes (security):
34903 - We removed support for the old (v0) control protocol. It has been
34904 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
34905 become more of a headache than it's worth.
34907 o Major bugfixes (load balancing):
34908 - When choosing nodes for non-guard positions, weight guards
34909 proportionally less, since they already have enough load. Patch
34911 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34912 will allow fast Tor servers to get more attention.
34913 - When we're upgrading from an old Tor version, forget our current
34914 guards and pick new ones according to the new weightings. These
34915 three load balancing patches could raise effective network capacity
34916 by a factor of four. Thanks to Mike Perry for measurements.
34918 o Major bugfixes (stream expiration):
34919 - Expire not-yet-successful application streams in all cases if
34920 they've been around longer than SocksTimeout. Right now there are
34921 some cases where the stream will live forever, demanding a new
34922 circuit every 15 seconds. Fixes bug 454; reported by lodger.
34924 o Minor features (controller):
34925 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34926 is valid before any authentication has been received. It tells
34927 a controller what kind of authentication is expected, and what
34928 protocol is spoken. Implements proposal 119.
34930 o Minor bugfixes (performance):
34931 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
34932 greatly speeding up loading cached-routers from disk on startup.
34933 - Disable sentinel-based debugging for buffer code: we squashed all
34934 the bugs that this was supposed to detect a long time ago, and now
34935 its only effect is to change our buffer sizes from nice powers of
34936 two (which platform mallocs tend to like) to values slightly over
34937 powers of two (which make some platform mallocs sad).
34939 o Minor bugfixes (misc):
34940 - If exit bandwidth ever exceeds one third of total bandwidth, then
34941 use the correct formula to weight exit nodes when choosing paths.
34942 Based on patch from Mike Perry.
34943 - Choose perfectly fairly among routers when choosing by bandwidth and
34944 weighting by fraction of bandwidth provided by exits. Previously, we
34945 would choose with only approximate fairness, and correct ourselves
34946 if we ran off the end of the list.
34947 - If we require CookieAuthentication but we fail to write the
34948 cookie file, we would warn but not exit, and end up in a state
34949 where no controller could authenticate. Now we exit.
34950 - If we require CookieAuthentication, stop generating a new cookie
34951 every time we change any piece of our config.
34952 - Refuse to start with certain directory authority keys, and
34953 encourage people using them to stop.
34954 - Terminate multi-line control events properly. Original patch
34956 - Fix a minor memory leak when we fail to find enough suitable
34957 servers to choose a circuit.
34958 - Stop leaking part of the descriptor when we run into a particularly
34959 unparseable piece of it.
34962 Changes in version 0.2.0.6-alpha - 2007-08-26
34963 This sixth development snapshot features a new Vidalia version in the
34964 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
34965 the ControlPort in the default configuration, which addresses important
34968 In addition, this snapshot fixes major load balancing problems
34969 with path selection, which should speed things up a lot once many
34970 people have upgraded. The directory authorities also use a new
34971 mean-time-between-failure approach to tracking which servers are stable,
34972 rather than just looking at the most recent uptime.
34974 o New directory authorities:
34975 - Set up Tonga as the default bridge directory authority.
34978 - Directory authorities now track servers by weighted
34979 mean-times-between-failures. When we have 4 or more days of data,
34980 use measured MTBF rather than declared uptime to decide whether
34981 to call a router Stable. Implements proposal 108.
34983 o Major bugfixes (load balancing):
34984 - When choosing nodes for non-guard positions, weight guards
34985 proportionally less, since they already have enough load. Patch
34987 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34988 will allow fast Tor servers to get more attention.
34989 - When we're upgrading from an old Tor version, forget our current
34990 guards and pick new ones according to the new weightings. These
34991 three load balancing patches could raise effective network capacity
34992 by a factor of four. Thanks to Mike Perry for measurements.
34994 o Major bugfixes (descriptor parsing):
34995 - Handle unexpected whitespace better in malformed descriptors. Bug
34996 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
34999 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
35000 GETINFO for Torstat to use until it can switch to using extrainfos.
35001 - Optionally (if built with -DEXPORTMALLINFO) export the output
35002 of mallinfo via http, as tor/mallinfo.txt. Only accessible
35006 - Do not intermix bridge routers with controller-added
35007 routers. (Bugfix on 0.2.0.x)
35008 - Do not fail with an assert when accept() returns an unexpected
35009 address family. Addresses but does not wholly fix bug 483. (Bugfix
35011 - Let directory authorities startup even when they can't generate
35012 a descriptor immediately, e.g. because they don't know their
35014 - Stop putting the authentication cookie in a file called "0"
35015 in your working directory if you don't specify anything for the
35016 new CookieAuthFile option. Reported by Matt Edman.
35017 - Make it possible to read the PROTOCOLINFO response in a way that
35018 conforms to our control-spec. Reported by Matt Edman.
35019 - Fix a minor memory leak when we fail to find enough suitable
35020 servers to choose a circuit. Bugfix on 0.1.2.x.
35021 - Stop leaking part of the descriptor when we run into a particularly
35022 unparseable piece of it. Bugfix on 0.1.2.x.
35023 - Unmap the extrainfo cache file on exit.
35026 Changes in version 0.2.0.5-alpha - 2007-08-19
35027 This fifth development snapshot fixes compilation on Windows again;
35028 fixes an obnoxious client-side bug that slowed things down and put
35029 extra load on the network; gets us closer to using the v3 directory
35030 voting scheme; makes it easier for Tor controllers to use cookie-based
35031 authentication; and fixes a variety of other bugs.
35033 o Removed features:
35034 - Version 1 directories are no longer generated in full. Instead,
35035 authorities generate and serve "stub" v1 directories that list
35036 no servers. This will stop Tor versions 0.1.0.x and earlier from
35037 working, but (for security reasons) nobody should be running those
35040 o Major bugfixes (compilation, 0.2.0.x):
35041 - Try to fix Win32 compilation again: improve checking for IPv6 types.
35042 - Try to fix MSVC compilation: build correctly on platforms that do
35043 not define s6_addr16 or s6_addr32.
35044 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
35047 o Major bugfixes (stream expiration):
35048 - Expire not-yet-successful application streams in all cases if
35049 they've been around longer than SocksTimeout. Right now there are
35050 some cases where the stream will live forever, demanding a new
35051 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
35052 reported by lodger.
35054 o Minor features (directory servers):
35055 - When somebody requests a list of statuses or servers, and we have
35056 none of those, return a 404 rather than an empty 200.
35058 o Minor features (directory voting):
35059 - Store v3 consensus status consensuses on disk, and reload them
35062 o Minor features (security):
35063 - Warn about unsafe ControlPort configurations.
35064 - Refuse to start with certain directory authority keys, and
35065 encourage people using them to stop.
35067 o Minor features (controller):
35068 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
35069 is valid before any authentication has been received. It tells
35070 a controller what kind of authentication is expected, and what
35071 protocol is spoken. Implements proposal 119.
35072 - New config option CookieAuthFile to choose a new location for the
35073 cookie authentication file, and config option
35074 CookieAuthFileGroupReadable to make it group-readable.
35076 o Minor features (unit testing):
35077 - Add command-line arguments to unit-test executable so that we can
35078 invoke any chosen test from the command line rather than having
35079 to run the whole test suite at once; and so that we can turn on
35080 logging for the unit tests.
35082 o Minor bugfixes (on 0.1.2.x):
35083 - If we require CookieAuthentication but we fail to write the
35084 cookie file, we would warn but not exit, and end up in a state
35085 where no controller could authenticate. Now we exit.
35086 - If we require CookieAuthentication, stop generating a new cookie
35087 every time we change any piece of our config.
35088 - When loading bandwidth history, do not believe any information in
35089 the future. Fixes bug 434.
35090 - When loading entry guard information, do not believe any information
35092 - When we have our clock set far in the future and generate an
35093 onion key, then re-set our clock to be correct, we should not stop
35094 the onion key from getting rotated.
35095 - Clean up torrc sample config file.
35096 - Do not automatically run configure from autogen.sh. This
35097 non-standard behavior tended to annoy people who have built other
35100 o Minor bugfixes (on 0.2.0.x):
35101 - Fix a bug with AutomapHostsOnResolve that would always cause
35102 the second request to fail. Bug reported by Kate. Bugfix on
35104 - Fix a bug in ADDRMAP controller replies that would sometimes
35105 try to print a NULL. Patch from tup.
35106 - Read v3 directory authority keys from the right location.
35107 - Numerous bugfixes to directory voting code.
35110 Changes in version 0.1.2.16 - 2007-08-01
35111 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
35112 remote attacker in certain situations to rewrite the user's torrc
35113 configuration file. This can completely compromise anonymity of users
35114 in most configurations, including those running the Vidalia bundles,
35115 TorK, etc. Or worse.
35117 o Major security fixes:
35118 - Close immediately after missing authentication on control port;
35119 do not allow multiple authentication attempts.
35122 Changes in version 0.2.0.4-alpha - 2007-08-01
35123 This fourth development snapshot fixes a critical security vulnerability
35124 for most users, specifically those running Vidalia, TorK, etc. Everybody
35125 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
35127 o Major security fixes:
35128 - Close immediately after missing authentication on control port;
35129 do not allow multiple authentication attempts.
35131 o Major bugfixes (compilation):
35132 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
35135 o Minor features (performance):
35136 - Be even more aggressive about releasing RAM from small
35137 empty buffers. Thanks to our free-list code, this shouldn't be too
35138 performance-intensive.
35139 - Disable sentinel-based debugging for buffer code: we squashed all
35140 the bugs that this was supposed to detect a long time ago, and
35141 now its only effect is to change our buffer sizes from nice
35142 powers of two (which platform mallocs tend to like) to values
35143 slightly over powers of two (which make some platform mallocs sad).
35144 - Log malloc statistics from mallinfo() on platforms where it
35148 Changes in version 0.2.0.3-alpha - 2007-07-29
35149 This third development snapshot introduces new experimental
35150 blocking-resistance features and a preliminary version of the v3
35151 directory voting design, and includes many other smaller features
35155 - The first pieces of our "bridge" design for blocking-resistance
35156 are implemented. People can run bridge directory authorities;
35157 people can run bridges; and people can configure their Tor clients
35158 with a set of bridges to use as the first hop into the Tor network.
35159 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
35161 - Create listener connections before we setuid to the configured
35162 User and Group. Now non-Windows users can choose port values
35163 under 1024, start Tor as root, and have Tor bind those ports
35164 before it changes to another UID. (Windows users could already
35166 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
35167 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
35168 on "vserver" accounts. (Patch from coderman.)
35169 - Be even more aggressive about separating local traffic from relayed
35170 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
35172 o Major features (experimental):
35173 - First cut of code for "v3 dir voting": directory authorities will
35174 vote on a common network status document rather than each publishing
35175 their own opinion. This code needs more testing and more corner-case
35176 handling before it's ready for use.
35179 - Directory authorities now call routers Fast if their bandwidth is
35180 at least 100KB/s, and consider their bandwidth adequate to be a
35181 Guard if it is at least 250KB/s, no matter the medians. This fix
35182 complements proposal 107. [Bugfix on 0.1.2.x]
35183 - Directory authorities now never mark more than 3 servers per IP as
35184 Valid and Running. (Implements proposal 109, by Kevin Bauer and
35186 - Minor change to organizationName and commonName generation
35187 procedures in TLS certificates during Tor handshakes, to invalidate
35188 some earlier censorware approaches. This is not a long-term
35189 solution, but applying it will give us a bit of time to look into
35190 the epidemiology of countermeasures as they spread.
35192 o Major bugfixes (directory):
35193 - Rewrite directory tokenization code to never run off the end of
35194 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
35196 o Minor features (controller):
35197 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
35198 match requests to applications. (Patch from Robert Hogan.)
35199 - Report address and port correctly on connections to DNSPort. (Patch
35200 from Robert Hogan.)
35201 - Add a RESOLVE command to launch hostname lookups. (Original patch
35202 from Robert Hogan.)
35203 - Add GETINFO status/enough-dir-info to let controllers tell whether
35204 Tor has downloaded sufficient directory information. (Patch
35206 - You can now use the ControlSocket option to tell Tor to listen for
35207 controller connections on Unix domain sockets on systems that
35208 support them. (Patch from Peter Palfrader.)
35209 - STREAM NEW events are generated for DNSPort requests and for
35210 tunneled directory connections. (Patch from Robert Hogan.)
35211 - New "GETINFO address-mappings/*" command to get address mappings
35212 with expiry information. "addr-mappings/*" is now deprecated.
35215 o Minor features (misc):
35216 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
35218 - The tor-gencert tool for v3 directory authorities now creates all
35219 files as readable to the file creator only, and write-protects
35220 the authority identity key.
35221 - When dumping memory usage, list bytes used in buffer memory
35223 - When running with dmalloc, dump more stats on hup and on exit.
35224 - Directory authorities now fail quickly and (relatively) harmlessly
35225 if they generate a network status document that is somehow
35228 o Traffic load balancing improvements:
35229 - If exit bandwidth ever exceeds one third of total bandwidth, then
35230 use the correct formula to weight exit nodes when choosing paths.
35231 (Based on patch from Mike Perry.)
35232 - Choose perfectly fairly among routers when choosing by bandwidth and
35233 weighting by fraction of bandwidth provided by exits. Previously, we
35234 would choose with only approximate fairness, and correct ourselves
35235 if we ran off the end of the list. [Bugfix on 0.1.2.x]
35237 o Performance improvements:
35238 - Be more aggressive with freeing buffer RAM or putting it on the
35240 - Use Critical Sections rather than Mutexes for synchronizing threads
35241 on win32; Mutexes are heavier-weight, and designed for synchronizing
35244 o Deprecated and removed features:
35245 - RedirectExits is now deprecated.
35246 - Stop allowing address masks that do not correspond to bit prefixes.
35247 We have warned about these for a really long time; now it's time
35248 to reject them. (Patch from croup.)
35250 o Minor bugfixes (directory):
35251 - Fix another crash bug related to extra-info caching. (Bug found by
35252 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
35253 - Directories no longer return a "304 not modified" when they don't
35254 have the networkstatus the client asked for. Also fix a memory
35255 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
35256 - We had accidentally labelled 0.1.2.x directory servers as not
35257 suitable for begin_dir requests, and had labelled no directory
35258 servers as suitable for uploading extra-info documents. [Bugfix
35261 o Minor bugfixes (dns):
35262 - Fix a crash when DNSPort is set more than once. (Patch from Robert
35263 Hogan.) [Bugfix on 0.2.0.2-alpha]
35264 - Add DNSPort connections to the global connection list, so that we
35265 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
35267 - Fix a dangling reference that could lead to a crash when DNSPort is
35268 changed or closed (Patch from Robert Hogan.) [Bugfix on
35271 o Minor bugfixes (controller):
35272 - Provide DNS expiry times in GMT, not in local time. For backward
35273 compatibility, ADDRMAP events only provide GMT expiry in an extended
35274 field. "GETINFO address-mappings" always does the right thing.
35275 - Use CRLF line endings properly in NS events.
35276 - Terminate multi-line control events properly. (Original patch
35277 from tup.) [Bugfix on 0.1.2.x-alpha]
35278 - Do not include spaces in SOURCE_ADDR fields in STREAM
35279 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
35282 Changes in version 0.1.2.15 - 2007-07-17
35283 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
35284 problems, fixes compilation on BSD, and fixes a variety of other
35285 bugs. Everybody should upgrade.
35287 o Major bugfixes (compilation):
35288 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
35290 o Major bugfixes (crashes):
35291 - Try even harder not to dereference the first character after
35292 an mmap(). Reported by lodger.
35293 - Fix a crash bug in directory authorities when we re-number the
35294 routerlist while inserting a new router.
35295 - When the cached-routers file is an even multiple of the page size,
35296 don't run off the end and crash. (Fixes bug 455; based on idea
35298 - Fix eventdns.c behavior on Solaris: It is critical to include
35299 orconfig.h _before_ sys/types.h, so that we can get the expected
35300 definition of _FILE_OFFSET_BITS.
35302 o Major bugfixes (security):
35303 - Fix a possible buffer overrun when using BSD natd support. Bug
35305 - When sending destroy cells from a circuit's origin, don't include
35306 the reason for tearing down the circuit. The spec says we didn't,
35307 and now we actually don't. Reported by lodger.
35308 - Keep streamids from different exits on a circuit separate. This
35309 bug may have allowed other routers on a given circuit to inject
35310 cells into streams. Reported by lodger; fixes bug 446.
35311 - If there's a never-before-connected-to guard node in our list,
35312 never choose any guards past it. This way we don't expand our
35313 guard list unless we need to.
35315 o Minor bugfixes (guard nodes):
35316 - Weight guard selection by bandwidth, so that low-bandwidth nodes
35317 don't get overused as guards.
35319 o Minor bugfixes (directory):
35320 - Correctly count the number of authorities that recommend each
35321 version. Previously, we were under-counting by 1.
35322 - Fix a potential crash bug when we load many server descriptors at
35323 once and some of them make others of them obsolete. Fixes bug 458.
35325 o Minor bugfixes (hidden services):
35326 - Stop tearing down the whole circuit when the user asks for a
35327 connection to a port that the hidden service didn't configure.
35330 o Minor bugfixes (misc):
35331 - On Windows, we were preventing other processes from reading
35332 cached-routers while Tor was running. Reported by janbar.
35333 - Fix a possible (but very unlikely) bug in picking routers by
35334 bandwidth. Add a log message to confirm that it is in fact
35335 unlikely. Patch from lodger.
35336 - Backport a couple of memory leak fixes.
35337 - Backport miscellaneous cosmetic bugfixes.
35340 Changes in version 0.2.0.2-alpha - 2007-06-02
35341 o Major bugfixes on 0.2.0.1-alpha:
35342 - Fix an assertion failure related to servers without extra-info digests.
35343 Resolves bugs 441 and 442.
35345 o Minor features (directory):
35346 - Support "If-Modified-Since" when answering HTTP requests for
35347 directories, running-routers documents, and network-status documents.
35348 (There's no need to support it for router descriptors, since those
35349 are downloaded by descriptor digest.)
35351 o Minor build issues:
35352 - Clear up some MIPSPro compiler warnings.
35353 - When building from a tarball on a machine that happens to have SVK
35354 installed, report the micro-revision as whatever version existed
35355 in the tarball, not as "x".
35358 Changes in version 0.2.0.1-alpha - 2007-06-01
35359 This early development snapshot provides new features for people running
35360 Tor as both a client and a server (check out the new RelayBandwidth
35361 config options); lets Tor run as a DNS proxy; and generally moves us
35362 forward on a lot of fronts.
35364 o Major features, server usability:
35365 - New config options RelayBandwidthRate and RelayBandwidthBurst:
35366 a separate set of token buckets for relayed traffic. Right now
35367 relayed traffic is defined as answers to directory requests, and
35368 OR connections that don't have any local circuits on them.
35370 o Major features, client usability:
35371 - A client-side DNS proxy feature to replace the need for
35372 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
35373 for DNS requests on port 9999, use the Tor network to resolve them
35374 anonymously, and send the reply back like a regular DNS server.
35375 The code still only implements a subset of DNS.
35376 - Make PreferTunneledDirConns and TunnelDirConns work even when
35377 we have no cached directory info. This means Tor clients can now
35378 do all of their connections protected by TLS.
35380 o Major features, performance and efficiency:
35381 - Directory authorities accept and serve "extra info" documents for
35382 routers. These documents contain fields from router descriptors
35383 that aren't usually needed, and that use a lot of excess
35384 bandwidth. Once these fields are removed from router descriptors,
35385 the bandwidth savings should be about 60%. [Partially implements
35387 - Servers upload extra-info documents to any authority that accepts
35388 them. Authorities (and caches that have been configured to download
35389 extra-info documents) download them as needed. [Partially implements
35391 - Change the way that Tor buffers data that it is waiting to write.
35392 Instead of queueing data cells in an enormous ring buffer for each
35393 client->OR or OR->OR connection, we now queue cells on a separate
35394 queue for each circuit. This lets us use less slack memory, and
35395 will eventually let us be smarter about prioritizing different kinds
35397 - Use memory pools to allocate cells with better speed and memory
35398 efficiency, especially on platforms where malloc() is inefficient.
35399 - Stop reading on edge connections when their corresponding circuit
35400 buffers are full; start again as the circuits empty out.
35402 o Major features, other:
35403 - Add an HSAuthorityRecordStats option that hidden service authorities
35404 can use to track statistics of overall hidden service usage without
35405 logging information that would be very useful to an attacker.
35406 - Start work implementing multi-level keys for directory authorities:
35407 Add a standalone tool to generate key certificates. (Proposal 103.)
35410 - Directory authorities now call routers Stable if they have an
35411 uptime of at least 30 days, even if that's not the median uptime
35412 in the network. Implements proposal 107, suggested by Kevin Bauer
35415 o Minor fixes (resource management):
35416 - Count the number of open sockets separately from the number
35417 of active connection_t objects. This will let us avoid underusing
35418 our allocated connection limit.
35419 - We no longer use socket pairs to link an edge connection to an
35420 anonymous directory connection or a DirPort test connection.
35421 Instead, we track the link internally and transfer the data
35422 in-process. This saves two sockets per "linked" connection (at the
35423 client and at the server), and avoids the nasty Windows socketpair()
35425 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
35426 for every single inactive connection_t. Free items from the
35427 4k/16k-buffer free lists when they haven't been used for a while.
35429 o Minor features (build):
35430 - Make autoconf search for libevent, openssl, and zlib consistently.
35431 - Update deprecated macros in configure.in.
35432 - When warning about missing headers, tell the user to let us
35433 know if the compile succeeds anyway, so we can downgrade the
35435 - Include the current subversion revision as part of the version
35436 string: either fetch it directly if we're in an SVN checkout, do
35437 some magic to guess it if we're in an SVK checkout, or use
35438 the last-detected version if we're building from a .tar.gz.
35439 Use this version consistently in log messages.
35441 o Minor features (logging):
35442 - Always prepend "Bug: " to any log message about a bug.
35443 - Put a platform string (e.g. "Linux i686") in the startup log
35444 message, so when people paste just their logs, we know if it's
35445 OpenBSD or Windows or what.
35446 - When logging memory usage, break down memory used in buffers by
35449 o Minor features (directory system):
35450 - New config option V2AuthoritativeDirectory that all directory
35451 authorities should set. This will let future authorities choose
35452 not to serve V2 directory information.
35453 - Directory authorities allow multiple router descriptors and/or extra
35454 info documents to be uploaded in a single go. This will make
35455 implementing proposal 104 simpler.
35457 o Minor features (controller):
35458 - Add a new config option __DisablePredictedCircuits designed for
35459 use by the controller, when we don't want Tor to build any circuits
35461 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
35462 so we can exit from the middle of the circuit.
35463 - Implement "getinfo status/circuit-established".
35464 - Implement "getinfo status/version/..." so a controller can tell
35465 whether the current version is recommended, and whether any versions
35466 are good, and how many authorities agree. (Patch from shibz.)
35468 o Minor features (hidden services):
35469 - Allow multiple HiddenServicePort directives with the same virtual
35470 port; when they occur, the user is sent round-robin to one
35471 of the target ports chosen at random. Partially fixes bug 393 by
35472 adding limited ad-hoc round-robining.
35474 o Minor features (other):
35476 - Add a new AutomapHostsOnResolve option: when it is enabled, any
35477 resolve request for hosts matching a given pattern causes Tor to
35478 generate an internal virtual address mapping for that host. This
35479 allows DNSPort to work sensibly with hidden service users. By
35480 default, .exit and .onion addresses are remapped; the list of
35481 patterns can be reconfigured with AutomapHostsSuffixes.
35482 - Add an "-F" option to tor-resolve to force a resolve for a .onion
35483 address. Thanks to the AutomapHostsOnResolve option, this is no
35484 longer a completely silly thing to do.
35485 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
35486 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
35487 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
35488 minus 1 byte: the actual maximum declared bandwidth.
35490 o Removed features:
35491 - Removed support for the old binary "version 0" controller protocol.
35492 This has been deprecated since 0.1.1, and warnings have been issued
35493 since 0.1.2. When we encounter a v0 control message, we now send
35494 back an error and close the connection.
35495 - Remove the old "dns worker" server DNS code: it hasn't been default
35496 since 0.1.2.2-alpha, and all the servers seem to be using the new
35499 o Minor bugfixes (portability):
35500 - Even though Windows is equally happy with / and \ as path separators,
35501 try to use \ consistently on Windows and / consistently on Unix: it
35502 makes the log messages nicer.
35503 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
35504 - Read resolv.conf files correctly on platforms where read() returns
35505 partial results on small file reads.
35507 o Minor bugfixes (directory):
35508 - Correctly enforce that elements of directory objects do not appear
35509 more often than they are allowed to appear.
35510 - When we are reporting the DirServer line we just parsed, we were
35511 logging the second stanza of the key fingerprint, not the first.
35513 o Minor bugfixes (logging):
35514 - When we hit an EOF on a log (probably because we're shutting down),
35515 don't try to remove the log from the list: just mark it as
35516 unusable. (Bulletproofs against bug 222.)
35518 o Minor bugfixes (other):
35519 - In the exitlist script, only consider the most recently published
35520 server descriptor for each server. Also, when the user requests
35521 a list of servers that _reject_ connections to a given address,
35522 explicitly exclude the IPs that also have servers that accept
35523 connections to that address. (Resolves bug 405.)
35524 - Stop allowing hibernating servers to be "stable" or "fast".
35525 - On Windows, we were preventing other processes from reading
35526 cached-routers while Tor was running. (Reported by janbar)
35527 - Make the NodeFamilies config option work. (Reported by
35528 lodger -- it has never actually worked, even though we added it
35530 - Check return values from pthread_mutex functions.
35531 - Don't save non-general-purpose router descriptors to the disk cache,
35532 because we have no way of remembering what their purpose was when
35534 - Add even more asserts to hunt down bug 417.
35535 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
35536 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
35537 Add a log message to confirm that it is in fact unlikely.
35539 o Minor bugfixes (controller):
35540 - Make 'getinfo fingerprint' return a 551 error if we're not a
35541 server, so we match what the control spec claims we do. Reported
35543 - Fix a typo in an error message when extendcircuit fails that
35544 caused us to not follow the \r\n-based delimiter protocol. Reported
35547 o Code simplifications and refactoring:
35548 - Stop passing around circuit_t and crypt_path_t pointers that are
35549 implicit in other procedure arguments.
35550 - Drop the old code to choke directory connections when the
35551 corresponding OR connections got full: thanks to the cell queue
35552 feature, OR conns don't get full any more.
35553 - Make dns_resolve() handle attaching connections to circuits
35554 properly, so the caller doesn't have to.
35555 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
35556 - Keep the connection array as a dynamic smartlist_t, rather than as
35557 a fixed-sized array. This is important, as the number of connections
35558 is becoming increasingly decoupled from the number of sockets.
35561 Changes in version 0.1.2.14 - 2007-05-25
35562 Tor 0.1.2.14 changes the addresses of two directory authorities (this
35563 change especially affects those who serve or use hidden services),
35564 and fixes several other crash- and security-related bugs.
35566 o Directory authority changes:
35567 - Two directory authorities (moria1 and moria2) just moved to new
35568 IP addresses. This change will particularly affect those who serve
35569 or use hidden services.
35571 o Major bugfixes (crashes):
35572 - If a directory server runs out of space in the connection table
35573 as it's processing a begin_dir request, it will free the exit stream
35574 but leave it attached to the circuit, leading to unpredictable
35575 behavior. (Reported by seeess, fixes bug 425.)
35576 - Fix a bug in dirserv_remove_invalid() that would cause authorities
35577 to corrupt memory under some really unlikely scenarios.
35578 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
35579 - Avoid segfaults when reading from mmaped descriptor file. (Reported
35582 o Major bugfixes (security):
35583 - When choosing an entry guard for a circuit, avoid using guards
35584 that are in the same family as the chosen exit -- not just guards
35585 that are exactly the chosen exit. (Reported by lodger.)
35587 o Major bugfixes (resource management):
35588 - If a directory authority is down, skip it when deciding where to get
35589 networkstatus objects or descriptors. Otherwise we keep asking
35590 every 10 seconds forever. Fixes bug 384.
35591 - Count it as a failure if we fetch a valid network-status but we
35592 don't want to keep it. Otherwise we'll keep fetching it and keep
35593 not wanting to keep it. Fixes part of bug 422.
35594 - If all of our dirservers have given us bad or no networkstatuses
35595 lately, then stop hammering them once per minute even when we
35596 think they're failed. Fixes another part of bug 422.
35599 - Actually set the purpose correctly for descriptors inserted with
35600 purpose=controller.
35601 - When we have k non-v2 authorities in our DirServer config,
35602 we ignored the last k authorities in the list when updating our
35604 - Correctly back-off from requesting router descriptors that we are
35605 having a hard time downloading.
35606 - Read resolv.conf files correctly on platforms where read() returns
35607 partial results on small file reads.
35608 - Don't rebuild the entire router store every time we get 32K of
35609 routers: rebuild it when the journal gets very large, or when
35610 the gaps in the store get very large.
35613 - When routers publish SVN revisions in their router descriptors,
35614 authorities now include those versions correctly in networkstatus
35616 - Warn when using a version of libevent before 1.3b to run a server on
35617 OSX or BSD: these versions interact badly with userspace threads.
35620 Changes in version 0.1.2.13 - 2007-04-24
35621 This release features some major anonymity fixes, such as safer path
35622 selection; better client performance; faster bootstrapping, better
35623 address detection, and better DNS support for servers; write limiting as
35624 well as read limiting to make servers easier to run; and a huge pile of
35625 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
35627 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
35628 of the Freenode IRC network, remembering his patience and vision for
35629 free speech on the Internet.
35632 - Fix a memory leak when we ask for "all" networkstatuses and we
35633 get one we don't recognize.
35634 - Add more asserts to hunt down bug 417.
35635 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
35638 Changes in version 0.1.2.12-rc - 2007-03-16
35640 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
35641 directory information requested inside Tor connections (i.e. via
35642 begin_dir cells). It only triggered when the same connection was
35643 serving other data at the same time. Reported by seeess.
35646 - When creating a circuit via the controller, send a 'launched'
35647 event when we're done, so we follow the spec better.
35650 Changes in version 0.1.2.11-rc - 2007-03-15
35651 o Minor bugfixes (controller), reported by daejees:
35652 - Correct the control spec to match how the code actually responds
35653 to 'getinfo addr-mappings/*'.
35654 - The control spec described a GUARDS event, but the code
35655 implemented a GUARD event. Standardize on GUARD, but let people
35656 ask for GUARDS too.
35659 Changes in version 0.1.2.10-rc - 2007-03-07
35660 o Major bugfixes (Windows):
35661 - Do not load the NT services library functions (which may not exist)
35662 just to detect if we're a service trying to shut down. Now we run
35663 on Win98 and friends again.
35665 o Minor bugfixes (other):
35666 - Clarify a couple of log messages.
35667 - Fix a misleading socks5 error number.
35670 Changes in version 0.1.2.9-rc - 2007-03-02
35671 o Major bugfixes (Windows):
35672 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
35673 of the usual GCC "%llu". This prevents a bug when saving 64-bit
35674 int configuration values: the high-order 32 bits would get
35675 truncated. In particular, we were being bitten by the default
35676 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
35677 and maybe also bug 397.)
35679 o Minor bugfixes (performance):
35680 - Use OpenSSL's AES implementation on platforms where it's faster.
35681 This could save us as much as 10% CPU usage.
35683 o Minor bugfixes (server):
35684 - Do not rotate onion key immediately after setting it for the first
35687 o Minor bugfixes (directory authorities):
35688 - Stop calling servers that have been hibernating for a long time
35689 "stable". Also, stop letting hibernating or obsolete servers affect
35690 uptime and bandwidth cutoffs.
35691 - Stop listing hibernating servers in the v1 directory.
35693 o Minor bugfixes (hidden services):
35694 - Upload hidden service descriptors slightly less often, to reduce
35695 load on authorities.
35697 o Minor bugfixes (other):
35698 - Fix an assert that could trigger if a controller quickly set then
35699 cleared EntryNodes. Bug found by Udo van den Heuvel.
35700 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
35702 - Fix a potential race condition in the rpm installer. Found by
35704 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
35705 of 2 as indicating that the server is completely bad; it sometimes
35706 means that the server is just bad for the request in question. (may fix
35707 the last of bug 326.)
35708 - Disable encrypted directory connections when we don't have a server
35709 descriptor for the destination. We'll get this working again in
35713 Changes in version 0.1.2.8-beta - 2007-02-26
35714 o Major bugfixes (crashes):
35715 - Stop crashing when the controller asks us to resetconf more than
35716 one config option at once. (Vidalia 0.0.11 does this.)
35717 - Fix a crash that happened on Win98 when we're given command-line
35718 arguments: don't try to load NT service functions from advapi32.dll
35719 except when we need them. (Bug introduced in 0.1.2.7-alpha;
35721 - Fix a longstanding obscure crash bug that could occur when
35722 we run out of DNS worker processes. (Resolves bug 390.)
35724 o Major bugfixes (hidden services):
35725 - Correctly detect whether hidden service descriptor downloads are
35726 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
35728 o Major bugfixes (accounting):
35729 - When we start during an accounting interval before it's time to wake
35730 up, remember to wake up at the correct time. (May fix bug 342.)
35732 o Minor bugfixes (controller):
35733 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
35734 clear the corresponding on_circuit variable, and remember later
35735 that we don't need to send a redundant CLOSED event. Resolves part
35737 - Report events where a resolve succeeded or where we got a socks
35738 protocol error correctly, rather than calling both of them
35740 - Change reported stream target addresses to IP consistently when
35741 we finally get the IP from an exit node.
35742 - Send log messages to the controller even if they happen to be very
35745 o Minor bugfixes (other):
35746 - Display correct results when reporting which versions are
35747 recommended, and how recommended they are. (Resolves bug 383.)
35748 - Improve our estimates for directory bandwidth to be less random:
35749 guess that an unrecognized directory will have the average bandwidth
35750 from all known directories, not that it will have the average
35751 bandwidth from those directories earlier than it on the list.
35752 - If we start a server with ClientOnly 1, then set ClientOnly to 0
35753 and hup, stop triggering an assert based on an empty onion_key.
35754 - On platforms with no working mmap() equivalent, don't warn the
35755 user when cached-routers doesn't exist.
35756 - Warn the user when mmap() [or its equivalent] fails for some reason
35757 other than file-not-found.
35758 - Don't warn the user when cached-routers.new doesn't exist: that's
35759 perfectly fine when starting up for the first time.
35760 - When EntryNodes are configured, rebuild the guard list to contain,
35761 in order: the EntryNodes that were guards before; the rest of the
35762 EntryNodes; the nodes that were guards before.
35763 - Mask out all signals in sub-threads; only the libevent signal
35764 handler should be processing them. This should prevent some crashes
35765 on some machines using pthreads. (Patch from coderman.)
35766 - Fix switched arguments on memset in the implementation of
35767 tor_munmap() for systems with no mmap() call.
35768 - When Tor receives a router descriptor that it asked for, but
35769 no longer wants (because it has received fresh networkstatuses
35770 in the meantime), do not warn the user. Cache the descriptor if
35771 we're a cache; drop it if we aren't.
35772 - Make earlier entry guards _really_ get retried when the network
35774 - On a malformed DNS reply, always give an error to the corresponding
35776 - Build with recent libevents on platforms that do not define the
35777 nonstandard types "u_int8_t" and friends.
35779 o Minor features (controller):
35780 - Warn the user when an application uses the obsolete binary v0
35781 control protocol. We're planning to remove support for it during
35782 the next development series, so it's good to give people some
35784 - Add STREAM_BW events to report per-entry-stream bandwidth
35785 use. (Patch from Robert Hogan.)
35786 - Rate-limit SIGNEWNYM signals in response to controllers that
35787 impolitely generate them for every single stream. (Patch from
35788 mwenge; closes bug 394.)
35789 - Make REMAP stream events have a SOURCE (cache or exit), and
35790 make them generated in every case where we get a successful
35791 connected or resolved cell.
35793 o Minor bugfixes (performance):
35794 - Call router_have_min_dir_info half as often. (This is showing up in
35795 some profiles, but not others.)
35796 - When using GCC, make log_debug never get called at all, and its
35797 arguments never get evaluated, when no debug logs are configured.
35798 (This is showing up in some profiles, but not others.)
35801 - Remove some never-implemented options. Mark PathlenCoinWeight as
35803 - Implement proposal 106: Stop requiring clients to have well-formed
35804 certificates; stop checking nicknames in certificates. (Clients
35805 have certificates so that they can look like Tor servers, but in
35806 the future we might want to allow them to look like regular TLS
35807 clients instead. Nicknames in certificates serve no purpose other
35808 than making our protocol easier to recognize on the wire.)
35809 - Revise messages on handshake failure again to be even more clear about
35810 which are incoming connections and which are outgoing.
35811 - Discard any v1 directory info that's over 1 month old (for
35812 directories) or over 1 week old (for running-routers lists).
35813 - Do not warn when individual nodes in the configuration's EntryNodes,
35814 ExitNodes, etc are down: warn only when all possible nodes
35815 are down. (Fixes bug 348.)
35816 - Always remove expired routers and networkstatus docs before checking
35817 whether we have enough information to build circuits. (Fixes
35819 - Put a lower-bound on MaxAdvertisedBandwidth.
35822 Changes in version 0.1.2.7-alpha - 2007-02-06
35823 o Major bugfixes (rate limiting):
35824 - Servers decline directory requests much more aggressively when
35825 they're low on bandwidth. Otherwise they end up queueing more and
35826 more directory responses, which can't be good for latency.
35827 - But never refuse directory requests from local addresses.
35828 - Fix a memory leak when sending a 503 response for a networkstatus
35830 - Be willing to read or write on local connections (e.g. controller
35831 connections) even when the global rate limiting buckets are empty.
35832 - If our system clock jumps back in time, don't publish a negative
35833 uptime in the descriptor. Also, don't let the global rate limiting
35834 buckets go absurdly negative.
35835 - Flush local controller connection buffers periodically as we're
35836 writing to them, so we avoid queueing 4+ megabytes of data before
35839 o Major bugfixes (NT services):
35840 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
35841 command-line flag so that admins can override the default by saying
35842 "tor --service install --user "SomeUser"". This will not affect
35843 existing installed services. Also, warn the user that the service
35844 will look for its configuration file in the service user's
35845 %appdata% directory. (We can't do the 'hardwire the user's appdata
35846 directory' trick any more, since we may not have read access to that
35849 o Major bugfixes (other):
35850 - Previously, we would cache up to 16 old networkstatus documents
35851 indefinitely, if they came from nontrusted authorities. Now we
35852 discard them if they are more than 10 days old.
35853 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
35855 - Detect and reject malformed DNS responses containing circular
35857 - If exits are rare enough that we're not marking exits as guards,
35858 ignore exit bandwidth when we're deciding the required bandwidth
35860 - When we're handling a directory connection tunneled over Tor,
35861 don't fill up internal memory buffers with all the data we want
35862 to tunnel; instead, only add it if the OR connection that will
35863 eventually receive it has some room for it. (This can lead to
35864 slowdowns in tunneled dir connections; a better solution will have
35865 to wait for 0.2.0.)
35867 o Minor bugfixes (dns):
35868 - Add some defensive programming to eventdns.c in an attempt to catch
35869 possible memory-stomping bugs.
35870 - Detect and reject DNS replies containing IPv4 or IPv6 records with
35871 an incorrect number of bytes. (Previously, we would ignore the
35873 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
35874 in the correct order, and doesn't crash.
35875 - Free memory held in recently-completed DNS lookup attempts on exit.
35876 This was not a memory leak, but may have been hiding memory leaks.
35877 - Handle TTL values correctly on reverse DNS lookups.
35878 - Treat failure to parse resolv.conf as an error.
35880 o Minor bugfixes (other):
35881 - Fix crash with "tor --list-fingerprint" (reported by seeess).
35882 - When computing clock skew from directory HTTP headers, consider what
35883 time it was when we finished asking for the directory, not what
35885 - Expire socks connections if they spend too long waiting for the
35886 handshake to finish. Previously we would let them sit around for
35887 days, if the connecting application didn't close them either.
35888 - And if the socks handshake hasn't started, don't send a
35889 "DNS resolve socks failed" handshake reply; just close it.
35890 - Stop using C functions that OpenBSD's linker doesn't like.
35891 - Don't launch requests for descriptors unless we have networkstatuses
35892 from at least half of the authorities. This delays the first
35893 download slightly under pathological circumstances, but can prevent
35894 us from downloading a bunch of descriptors we don't need.
35895 - Do not log IPs with TLS failures for incoming TLS
35896 connections. (Fixes bug 382.)
35897 - If the user asks to use invalid exit nodes, be willing to use
35899 - Stop using the reserved ac_cv namespace in our configure script.
35900 - Call stat() slightly less often; use fstat() when possible.
35901 - Refactor the way we handle pending circuits when an OR connection
35902 completes or fails, in an attempt to fix a rare crash bug.
35903 - Only rewrite a conn's address based on X-Forwarded-For: headers
35904 if it's a parseable public IP address; and stop adding extra quotes
35905 to the resulting address.
35908 - Weight directory requests by advertised bandwidth. Now we can
35909 let servers enable write limiting but still allow most clients to
35910 succeed at their directory requests. (We still ignore weights when
35911 choosing a directory authority; I hope this is a feature.)
35914 - Create a new file ReleaseNotes which was the old ChangeLog. The
35915 new ChangeLog file now includes the summaries for all development
35917 - Check for addresses with invalid characters at the exit as well
35918 as at the client, and warn less verbosely when they fail. You can
35919 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
35920 - Adapt a patch from goodell to let the contrib/exitlist script
35921 take arguments rather than require direct editing.
35922 - Inform the server operator when we decide not to advertise a
35923 DirPort due to AccountingMax enabled or a low BandwidthRate. It
35924 was confusing Zax, so now we're hopefully more helpful.
35925 - Bring us one step closer to being able to establish an encrypted
35926 directory tunnel without knowing a descriptor first. Still not
35927 ready yet. As part of the change, now assume we can use a
35928 create_fast cell if we don't know anything about a router.
35929 - Allow exit nodes to use nameservers running on ports other than 53.
35930 - Servers now cache reverse DNS replies.
35931 - Add an --ignore-missing-torrc command-line option so that we can
35932 get the "use sensible defaults if the configuration file doesn't
35933 exist" behavior even when specifying a torrc location on the command
35936 o Minor features (controller):
35937 - Track reasons for OR connection failure; make these reasons
35938 available via the controller interface. (Patch from Mike Perry.)
35939 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
35940 can learn when clients are sending malformed hostnames to Tor.
35941 - Clean up documentation for controller status events.
35942 - Add a REMAP status to stream events to note that a stream's
35943 address has changed because of a cached address or a MapAddress
35947 Changes in version 0.1.2.6-alpha - 2007-01-09
35949 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
35950 connection handles more than 4 gigs in either direction, we crash.
35951 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
35952 advertised exit node, somebody might try to exit from us when
35953 we're bootstrapping and before we've built our descriptor yet.
35954 Refuse the connection rather than crashing.
35957 - Warn if we (as a server) find that we've resolved an address that we
35958 weren't planning to resolve.
35959 - Warn that using select() on any libevent version before 1.1 will be
35960 unnecessarily slow (even for select()).
35961 - Flush ERR-level controller status events just like we currently
35962 flush ERR-level log events, so that a Tor shutdown doesn't prevent
35963 the controller from learning about current events.
35965 o Minor features (more controller status events):
35966 - Implement EXTERNAL_ADDRESS server status event so controllers can
35967 learn when our address changes.
35968 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
35969 can learn when directories reject our descriptor.
35970 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
35971 can learn when a client application is speaking a non-socks protocol
35973 - Implement DANGEROUS_SOCKS client status event so controllers
35974 can learn when a client application is leaking DNS addresses.
35975 - Implement BUG general status event so controllers can learn when
35976 Tor is unhappy about its internal invariants.
35977 - Implement CLOCK_SKEW general status event so controllers can learn
35978 when Tor thinks the system clock is set incorrectly.
35979 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
35980 server status events so controllers can learn when their descriptors
35981 are accepted by a directory.
35982 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
35983 server status events so controllers can learn about Tor's progress in
35984 deciding whether it's reachable from the outside.
35985 - Implement BAD_LIBEVENT general status event so controllers can learn
35986 when we have a version/method combination in libevent that needs to
35988 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
35989 and DNS_USELESS server status events so controllers can learn
35990 about changes to DNS server status.
35992 o Minor features (directory):
35993 - Authorities no longer recommend exits as guards if this would shift
35994 too much load to the exit nodes.
35997 Changes in version 0.1.2.5-alpha - 2007-01-06
35999 - Enable write limiting as well as read limiting. Now we sacrifice
36000 capacity if we're pushing out lots of directory traffic, rather
36001 than overrunning the user's intended bandwidth limits.
36002 - Include TLS overhead when counting bandwidth usage; previously, we
36003 would count only the bytes sent over TLS, but not the bytes used
36005 - Support running the Tor service with a torrc not in the same
36006 directory as tor.exe and default to using the torrc located in
36007 the %appdata%\Tor\ of the user who installed the service. Patch
36009 - Servers now check for the case when common DNS requests are going to
36010 wildcarded addresses (i.e. all getting the same answer), and change
36011 their exit policy to reject *:* if it's happening.
36012 - Implement BEGIN_DIR cells, so we can connect to the directory
36013 server via TLS to do encrypted directory requests rather than
36014 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
36015 config options if you like.
36017 o Minor features (config and docs):
36018 - Start using the state file to store bandwidth accounting data:
36019 the bw_accounting file is now obsolete. We'll keep generating it
36020 for a while for people who are still using 0.1.2.4-alpha.
36021 - Try to batch changes to the state file so that we do as few
36022 disk writes as possible while still storing important things in
36024 - The state file and the bw_accounting file get saved less often when
36025 the AvoidDiskWrites config option is set.
36026 - Make PIDFile work on Windows (untested).
36027 - Add internal descriptions for a bunch of configuration options:
36028 accessible via controller interface and in comments in saved
36030 - Reject *:563 (NNTPS) in the default exit policy. We already reject
36031 NNTP by default, so this seems like a sensible addition.
36032 - Clients now reject hostnames with invalid characters. This should
36033 avoid some inadvertent info leaks. Add an option
36034 AllowNonRFC953Hostnames to disable this behavior, in case somebody
36035 is running a private network with hosts called @, !, and #.
36036 - Add a maintainer script to tell us which options are missing
36037 documentation: "make check-docs".
36038 - Add a new address-spec.txt document to describe our special-case
36039 addresses: .exit, .onion, and .noconnnect.
36041 o Minor features (DNS):
36042 - Ongoing work on eventdns infrastructure: now it has dns server
36043 and ipv6 support. One day Tor will make use of it.
36044 - Add client-side caching for reverse DNS lookups.
36045 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
36046 - When we change nameservers or IP addresses, reset and re-launch
36047 our tests for DNS hijacking.
36049 o Minor features (directory):
36050 - Authorities now specify server versions in networkstatus. This adds
36051 about 2% to the size of compressed networkstatus docs, and allows
36052 clients to tell which servers support BEGIN_DIR and which don't.
36053 The implementation is forward-compatible with a proposed future
36054 protocol version scheme not tied to Tor versions.
36055 - DirServer configuration lines now have an orport= option so
36056 clients can open encrypted tunnels to the authorities without
36057 having downloaded their descriptors yet. Enabled for moria1,
36058 moria2, tor26, and lefkada now in the default configuration.
36059 - Directory servers are more willing to send a 503 "busy" if they
36060 are near their write limit, especially for v1 directory requests.
36061 Now they can use their limited bandwidth for actual Tor traffic.
36062 - Clients track responses with status 503 from dirservers. After a
36063 dirserver has given us a 503, we try not to use it until an hour has
36064 gone by, or until we have no dirservers that haven't given us a 503.
36065 - When we get a 503 from a directory, and we're not a server, we don't
36066 count the failure against the total number of failures allowed
36067 for the thing we're trying to download.
36068 - Report X-Your-Address-Is correctly from tunneled directory
36069 connections; don't report X-Your-Address-Is when it's an internal
36070 address; and never believe reported remote addresses when they're
36072 - Protect against an unlikely DoS attack on directory servers.
36073 - Add a BadDirectory flag to network status docs so that authorities
36074 can (eventually) tell clients about caches they believe to be
36077 o Minor features (controller):
36078 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
36079 - Reimplement GETINFO so that info/names stays in sync with the
36081 - Implement "GETINFO fingerprint".
36082 - Implement "SETEVENTS GUARD" so controllers can get updates on
36083 entry guard status as it changes.
36085 o Minor features (clean up obsolete pieces):
36086 - Remove some options that have been deprecated since at least
36087 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
36088 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
36089 to set log options.
36090 - We no longer look for identity and onion keys in "identity.key" and
36091 "onion.key" -- these were replaced by secret_id_key and
36092 secret_onion_key in 0.0.8pre1.
36093 - We no longer require unrecognized directory entries to be
36096 o Major bugfixes (security):
36097 - Stop sending the HttpProxyAuthenticator string to directory
36098 servers when directory connections are tunnelled through Tor.
36099 - Clients no longer store bandwidth history in the state file.
36100 - Do not log introduction points for hidden services if SafeLogging
36102 - When generating bandwidth history, round down to the nearest
36103 1k. When storing accounting data, round up to the nearest 1k.
36104 - When we're running as a server, remember when we last rotated onion
36105 keys, so that we will rotate keys once they're a week old even if
36106 we never stay up for a week ourselves.
36108 o Major bugfixes (other):
36109 - Fix a longstanding bug in eventdns that prevented the count of
36110 timed-out resolves from ever being reset. This bug caused us to
36111 give up on a nameserver the third time it timed out, and try it
36112 10 seconds later... and to give up on it every time it timed out
36114 - Take out the '5 second' timeout from the connection retry
36115 schedule. Now the first connect attempt will wait a full 10
36116 seconds before switching to a new circuit. Perhaps this will help
36117 a lot. Based on observations from Mike Perry.
36118 - Fix a bug on the Windows implementation of tor_mmap_file() that
36119 would prevent the cached-routers file from ever loading. Reported
36123 - Fix an assert failure when a directory authority sets
36124 AuthDirRejectUnlisted and then receives a descriptor from an
36125 unlisted router. Reported by seeess.
36126 - Avoid a double-free when parsing malformed DirServer lines.
36127 - Fix a bug when a BSD-style PF socket is first used. Patch from
36129 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
36130 to resolve an address at a given exit node even when they ask for
36132 - Servers no longer ever list themselves in their "family" line,
36133 even if configured to do so. This makes it easier to configure
36134 family lists conveniently.
36135 - When running as a server, don't fall back to 127.0.0.1 when no
36136 nameservers are configured in /etc/resolv.conf; instead, make the
36137 user fix resolv.conf or specify nameservers explicitly. (Resolves
36139 - Stop accepting certain malformed ports in configured exit policies.
36140 - Don't re-write the fingerprint file every restart, unless it has
36142 - Stop warning when a single nameserver fails: only warn when _all_ of
36143 our nameservers have failed. Also, when we only have one nameserver,
36144 raise the threshold for deciding that the nameserver is dead.
36145 - Directory authorities now only decide that routers are reachable
36146 if their identity keys are as expected.
36147 - When the user uses bad syntax in the Log config line, stop
36148 suggesting other bad syntax as a replacement.
36149 - Correctly detect ipv6 DNS capability on OpenBSD.
36151 o Minor bugfixes (controller):
36152 - Report the circuit number correctly in STREAM CLOSED events. Bug
36153 reported by Mike Perry.
36154 - Do not report bizarre values for results of accounting GETINFOs
36155 when the last second's write or read exceeds the allotted bandwidth.
36156 - Report "unrecognized key" rather than an empty string when the
36157 controller tries to fetch a networkstatus that doesn't exist.
36160 Changes in version 0.1.1.26 - 2006-12-14
36161 o Security bugfixes:
36162 - Stop sending the HttpProxyAuthenticator string to directory
36163 servers when directory connections are tunnelled through Tor.
36164 - Clients no longer store bandwidth history in the state file.
36165 - Do not log introduction points for hidden services if SafeLogging
36169 - Fix an assert failure when a directory authority sets
36170 AuthDirRejectUnlisted and then receives a descriptor from an
36171 unlisted router (reported by seeess).
36174 Changes in version 0.1.2.4-alpha - 2006-12-03
36176 - Add support for using natd; this allows FreeBSDs earlier than
36177 5.1.2 to have ipfw send connections through Tor without using
36178 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
36181 - Make all connections to addresses of the form ".noconnect"
36182 immediately get closed. This lets application/controller combos
36183 successfully test whether they're talking to the same Tor by
36184 watching for STREAM events.
36185 - Make cross.sh cross-compilation script work even when autogen.sh
36186 hasn't been run. (Patch from Michael Mohr.)
36187 - Statistics dumped by -USR2 now include a breakdown of public key
36188 operations, for profiling.
36191 - Fix a major leak when directory authorities parse their
36192 approved-routers list, a minor memory leak when we fail to pick
36193 an exit node, and a few rare leaks on errors.
36194 - Handle TransPort connections even when the server sends data before
36195 the client sends data. Previously, the connection would just hang
36196 until the client sent data. (Patch from tup based on patch from
36198 - Avoid assert failure when our cached-routers file is empty on
36202 - Don't log spurious warnings when we see a circuit close reason we
36203 don't recognize; it's probably just from a newer version of Tor.
36204 - Have directory authorities allow larger amounts of drift in uptime
36205 without replacing the server descriptor: previously, a server that
36206 restarted every 30 minutes could have 48 "interesting" descriptors
36208 - Start linking to the Tor specification and Tor reference manual
36209 correctly in the Windows installer.
36210 - Add Vidalia to the OS X uninstaller script, so when we uninstall
36211 Tor/Privoxy we also uninstall Vidalia.
36212 - Resume building on Irix64, and fix a lot of warnings from its
36213 MIPSpro C compiler.
36214 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
36215 when we're running as a client.
36218 Changes in version 0.1.1.25 - 2006-11-04
36220 - When a client asks us to resolve (rather than connect to)
36221 an address, and we have a cached answer, give them the cached
36222 answer. Previously, we would give them no answer at all.
36223 - We were building exactly the wrong circuits when we predict
36224 hidden service requirements, meaning Tor would have to build all
36225 its circuits on demand.
36226 - If none of our live entry guards have a high uptime, but we
36227 require a guard with a high uptime, try adding a new guard before
36228 we give up on the requirement. This patch should make long-lived
36229 connections more stable on average.
36230 - When testing reachability of our DirPort, don't launch new
36231 tests when there's already one in progress -- unreachable
36232 servers were stacking up dozens of testing streams.
36234 o Security bugfixes:
36235 - When the user sends a NEWNYM signal, clear the client-side DNS
36236 cache too. Otherwise we continue to act on previous information.
36239 - Avoid a memory corruption bug when creating a hash table for
36241 - Avoid possibility of controller-triggered crash when misusing
36242 certain commands from a v0 controller on platforms that do not
36243 handle printf("%s",NULL) gracefully.
36244 - Avoid infinite loop on unexpected controller input.
36245 - Don't log spurious warnings when we see a circuit close reason we
36246 don't recognize; it's probably just from a newer version of Tor.
36247 - Add Vidalia to the OS X uninstaller script, so when we uninstall
36248 Tor/Privoxy we also uninstall Vidalia.
36251 Changes in version 0.1.2.3-alpha - 2006-10-29
36253 - Prepare for servers to publish descriptors less often: never
36254 discard a descriptor simply for being too old until either it is
36255 recommended by no authorities, or until we get a better one for
36256 the same router. Make caches consider retaining old recommended
36257 routers for even longer.
36258 - If most authorities set a BadExit flag for a server, clients
36259 don't think of it as a general-purpose exit. Clients only consider
36260 authorities that advertise themselves as listing bad exits.
36261 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
36262 headers for content, so that we can work better in the presence of
36263 caching HTTP proxies.
36264 - Allow authorities to list nodes as bad exits by fingerprint or by
36267 o Minor features, controller:
36268 - Add a REASON field to CIRC events; for backward compatibility, this
36269 field is sent only to controllers that have enabled the extended
36270 event format. Also, add additional reason codes to explain why
36271 a given circuit has been destroyed or truncated. (Patches from
36273 - Add a REMOTE_REASON field to extended CIRC events to tell the
36274 controller about why a remote OR told us to close a circuit.
36275 - Stream events also now have REASON and REMOTE_REASON fields,
36276 working much like those for circuit events.
36277 - There's now a GETINFO ns/... field so that controllers can ask Tor
36278 about the current status of a router.
36279 - A new event type "NS" to inform a controller when our opinion of
36280 a router's status has changed.
36281 - Add a GETINFO events/names and GETINFO features/names so controllers
36282 can tell which events and features are supported.
36283 - A new CLEARDNSCACHE signal to allow controllers to clear the
36284 client-side DNS cache without expiring circuits.
36286 o Security bugfixes:
36287 - When the user sends a NEWNYM signal, clear the client-side DNS
36288 cache too. Otherwise we continue to act on previous information.
36291 - Avoid sending junk to controllers or segfaulting when a controller
36292 uses EVENT_NEW_DESC with verbose nicknames.
36293 - Stop triggering asserts if the controller tries to extend hidden
36294 service circuits (reported by mwenge).
36295 - Avoid infinite loop on unexpected controller input.
36296 - When the controller does a "GETINFO network-status", tell it
36297 about even those routers whose descriptors are very old, and use
36298 long nicknames where appropriate.
36299 - Change NT service functions to be loaded on demand. This lets us
36300 build with MinGW without breaking Tor for Windows 98 users.
36301 - Do DirPort reachability tests less often, since a single test
36302 chews through many circuits before giving up.
36303 - In the hidden service example in torrc.sample, stop recommending
36304 esoteric and discouraged hidden service options.
36305 - When stopping an NT service, wait up to 10 sec for it to actually
36306 stop. Patch from Matt Edman; resolves bug 295.
36307 - Fix handling of verbose nicknames with ORCONN controller events:
36308 make them show up exactly when requested, rather than exactly when
36310 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
36311 printing a duplicate "$" in the keys we send (reported by mwenge).
36312 - Correctly set maximum connection limit on Cygwin. (This time
36314 - Try to detect Windows correctly when cross-compiling.
36315 - Detect the size of the routers file correctly even if it is
36316 corrupted (on systems without mmap) or not page-aligned (on systems
36317 with mmap). This bug was harmless.
36318 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
36319 to open a stream fails; now we do in more cases. This should
36320 make clients able to find a good exit faster in some cases, since
36321 unhandleable requests will now get an error rather than timing out.
36322 - Resolve two memory leaks when rebuilding the on-disk router cache
36323 (reported by fookoowa).
36324 - Clean up minor code warnings suggested by the MIPSpro C compiler,
36325 and reported by some Centos users.
36326 - Controller signals now work on non-Unix platforms that don't define
36327 SIGUSR1 and SIGUSR2 the way we expect.
36328 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
36329 values before failing, and always enables eventdns.
36330 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
36331 Try to fix this in configure.in by checking for most functions
36332 before we check for libevent.
36335 Changes in version 0.1.2.2-alpha - 2006-10-07
36337 - Make our async eventdns library on-by-default for Tor servers,
36338 and plan to deprecate the separate dnsworker threads.
36339 - Add server-side support for "reverse" DNS lookups (using PTR
36340 records so clients can determine the canonical hostname for a given
36341 IPv4 address). Only supported by servers using eventdns; servers
36342 now announce in their descriptors whether they support eventdns.
36343 - Specify and implement client-side SOCKS5 interface for reverse DNS
36344 lookups (see doc/socks-extensions.txt).
36345 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
36346 connect to directory servers through Tor. Previously, clients needed
36347 to find Tor exits to make private connections to directory servers.
36348 - Avoid choosing Exit nodes for entry or middle hops when the
36349 total bandwidth available from non-Exit nodes is much higher than
36350 the total bandwidth available from Exit nodes.
36351 - Workaround for name servers (like Earthlink's) that hijack failing
36352 DNS requests and replace the no-such-server answer with a "helpful"
36353 redirect to an advertising-driven search portal. Also work around
36354 DNS hijackers who "helpfully" decline to hijack known-invalid
36355 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
36356 lets you turn it off.
36357 - Send out a burst of long-range padding cells once we've established
36358 that we're reachable. Spread them over 4 circuits, so hopefully
36359 a few will be fast. This exercises our bandwidth and bootstraps
36360 us into the directory more quickly.
36362 o New/improved config options:
36363 - Add new config option "ResolvConf" to let the server operator
36364 choose an alternate resolve.conf file when using eventdns.
36365 - Add an "EnforceDistinctSubnets" option to control our "exclude
36366 servers on the same /16" behavior. It's still on by default; this
36367 is mostly for people who want to operate private test networks with
36368 all the machines on the same subnet.
36369 - If one of our entry guards is on the ExcludeNodes list, or the
36370 directory authorities don't think it's a good guard, treat it as
36371 if it were unlisted: stop using it as a guard, and throw it off
36372 the guards list if it stays that way for a long time.
36373 - Allow directory authorities to be marked separately as authorities
36374 for the v1 directory protocol, the v2 directory protocol, and
36375 as hidden service directories, to make it easier to retire old
36376 authorities. V1 authorities should set "HSAuthoritativeDir 1"
36377 to continue being hidden service authorities too.
36378 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
36380 o Minor features, controller:
36381 - Fix CIRC controller events so that controllers can learn the
36382 identity digests of non-Named servers used in circuit paths.
36383 - Let controllers ask for more useful identifiers for servers. Instead
36384 of learning identity digests for un-Named servers and nicknames
36385 for Named servers, the new identifiers include digest, nickname,
36386 and indication of Named status. Off by default; see control-spec.txt
36387 for more information.
36388 - Add a "getinfo address" controller command so it can display Tor's
36389 best guess to the user.
36390 - New controller event to alert the controller when our server
36391 descriptor has changed.
36392 - Give more meaningful errors on controller authentication failure.
36394 o Minor features, other:
36395 - When asked to resolve a hostname, don't use non-exit servers unless
36396 requested to do so. This allows servers with broken DNS to be
36397 useful to the network.
36398 - Divide eventdns log messages into warn and info messages.
36399 - Reserve the nickname "Unnamed" for routers that can't pick
36400 a hostname: any router can call itself Unnamed; directory
36401 authorities will never allocate Unnamed to any particular router;
36402 clients won't believe that any router is the canonical Unnamed.
36403 - Only include function names in log messages for info/debug messages.
36404 For notice/warn/err, the content of the message should be clear on
36405 its own, and printing the function name only confuses users.
36406 - Avoid some false positives during reachability testing: don't try
36407 to test via a server that's on the same /24 as us.
36408 - If we fail to build a circuit to an intended enclave, and it's
36409 not mandatory that we use that enclave, stop wanting it.
36410 - When eventdns is enabled, allow multithreaded builds on NetBSD and
36411 OpenBSD. (We had previously disabled threads on these platforms
36412 because they didn't have working thread-safe resolver functions.)
36414 o Major bugfixes, anonymity/security:
36415 - If a client asked for a server by name, and there's a named server
36416 in our network-status but we don't have its descriptor yet, we
36417 could return an unnamed server instead.
36418 - Fix NetBSD bug that could allow someone to force uninitialized RAM
36419 to be sent to a server's DNS resolver. This only affects NetBSD
36420 and other platforms that do not bounds-check tolower().
36421 - Reject (most) attempts to use Tor circuits with length one. (If
36422 many people start using Tor as a one-hop proxy, exit nodes become
36423 a more attractive target for compromise.)
36424 - Just because your DirPort is open doesn't mean people should be
36425 able to remotely teach you about hidden service descriptors. Now
36426 only accept rendezvous posts if you've got HSAuthoritativeDir set.
36428 o Major bugfixes, other:
36429 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
36430 - When a client asks the server to resolve (not connect to)
36431 an address, and it has a cached answer, give them the cached answer.
36432 Previously, the server would give them no answer at all.
36433 - Allow really slow clients to not hang up five minutes into their
36434 directory downloads (suggested by Adam J. Richter).
36435 - We were building exactly the wrong circuits when we anticipated
36436 hidden service requirements, meaning Tor would have to build all
36437 its circuits on demand.
36438 - Avoid crashing when we mmap a router cache file of size 0.
36439 - When testing reachability of our DirPort, don't launch new
36440 tests when there's already one in progress -- unreachable
36441 servers were stacking up dozens of testing streams.
36443 o Minor bugfixes, correctness:
36444 - If we're a directory mirror and we ask for "all" network status
36445 documents, we would discard status documents from authorities
36446 we don't recognize.
36447 - Avoid a memory corruption bug when creating a hash table for
36449 - Avoid controller-triggered crash when misusing certain commands
36450 from a v0 controller on platforms that do not handle
36451 printf("%s",NULL) gracefully.
36452 - Don't crash when a controller sends a third argument to an
36453 "extendcircuit" request.
36454 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
36455 response; fix error code when "getinfo dir/status/" fails.
36456 - Avoid crash when telling controller stream-status and a stream
36458 - Patch from Adam Langley to fix assert() in eventdns.c.
36459 - Fix a debug log message in eventdns to say "X resolved to Y"
36460 instead of "X resolved to X".
36461 - Make eventdns give strings for DNS errors, not just error numbers.
36462 - Track unreachable entry guards correctly: don't conflate
36463 'unreachable by us right now' with 'listed as down by the directory
36464 authorities'. With the old code, if a guard was unreachable by
36465 us but listed as running, it would clog our guard list forever.
36466 - Behave correctly in case we ever have a network with more than
36467 2GB/s total advertised capacity.
36468 - Make TrackExitHosts case-insensitive, and fix the behavior of
36469 ".suffix" TrackExitHosts items to avoid matching in the middle of
36471 - Finally fix the openssl warnings from newer gccs that believe that
36472 ignoring a return value is okay, but casting a return value and
36473 then ignoring it is a sign of madness.
36474 - Prevent the contrib/exitlist script from printing the same
36475 result more than once.
36476 - Patch from Steve Hildrey: Generate network status correctly on
36477 non-versioning dirservers.
36478 - Don't listen to the X-Your-Address-Is hint if you did the lookup
36479 via Tor; otherwise you'll think you're the exit node's IP address.
36481 o Minor bugfixes, performance:
36482 - Two small performance improvements on parsing descriptors.
36483 - Major performance improvement on inserting descriptors: change
36484 algorithm from O(n^2) to O(n).
36485 - Make the common memory allocation path faster on machines where
36486 malloc(0) returns a pointer.
36487 - Start remembering X-Your-Address-Is directory hints even if you're
36488 a client, so you can become a server more smoothly.
36489 - Avoid duplicate entries on MyFamily line in server descriptor.
36491 o Packaging, features:
36492 - Remove architecture from OS X builds. The official builds are
36493 now universal binaries.
36494 - The Debian package now uses --verify-config when (re)starting,
36495 to distinguish configuration errors from other errors.
36496 - Update RPMs to require libevent 1.1b.
36498 o Packaging, bugfixes:
36499 - Patches so Tor builds with MinGW on Windows.
36500 - Patches so Tor might run on Cygwin again.
36501 - Resume building on non-gcc compilers and ancient gcc. Resume
36502 building with the -O0 compile flag. Resume building cleanly on
36504 - Run correctly on OS X platforms with case-sensitive filesystems.
36505 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
36506 - Add autoconf checks so Tor can build on Solaris x86 again.
36509 - Documented (and renamed) ServerDNSSearchDomains and
36510 ServerDNSResolvConfFile options.
36511 - Be clearer that the *ListenAddress directives can be repeated
36515 Changes in version 0.1.1.24 - 2006-09-29
36517 - Allow really slow clients to not hang up five minutes into their
36518 directory downloads (suggested by Adam J. Richter).
36519 - Fix major performance regression from 0.1.0.x: instead of checking
36520 whether we have enough directory information every time we want to
36521 do something, only check when the directory information has changed.
36522 This should improve client CPU usage by 25-50%.
36523 - Don't crash if, after a server has been running for a while,
36524 it can't resolve its hostname.
36527 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36528 - Don't crash when the controller receives a third argument to an
36529 "extendcircuit" request.
36530 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
36531 response; fix error code when "getinfo dir/status/" fails.
36532 - Fix configure.in to not produce broken configure files with
36533 more recent versions of autoconf. Thanks to Clint for his auto*
36535 - Fix security bug on NetBSD that could allow someone to force
36536 uninitialized RAM to be sent to a server's DNS resolver. This
36537 only affects NetBSD and other platforms that do not bounds-check
36539 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
36540 methods: these are known to be buggy.
36541 - If we're a directory mirror and we ask for "all" network status
36542 documents, we would discard status documents from authorities
36543 we don't recognize.
36546 Changes in version 0.1.2.1-alpha - 2006-08-27
36548 - Add "eventdns" async dns library from Adam Langley, tweaked to
36549 build on OSX and Windows. Only enabled if you pass the
36550 --enable-eventdns argument to configure.
36551 - Allow servers with no hostname or IP address to learn their
36552 IP address by asking the directory authorities. This code only
36553 kicks in when you would normally have exited with a "no address"
36554 error. Nothing's authenticated, so use with care.
36555 - Rather than waiting a fixed amount of time between retrying
36556 application connections, we wait only 5 seconds for the first,
36557 10 seconds for the second, and 15 seconds for each retry after
36558 that. Hopefully this will improve the expected user experience.
36559 - Patch from Tup to add support for transparent AP connections:
36560 this basically bundles the functionality of trans-proxy-tor
36561 into the Tor mainline. Now hosts with compliant pf/netfilter
36562 implementations can redirect TCP connections straight to Tor
36563 without diverting through SOCKS. Needs docs.
36564 - Busy directory servers save lots of memory by spooling server
36565 descriptors, v1 directories, and v2 networkstatus docs to buffers
36566 as needed rather than en masse. Also mmap the cached-routers
36567 files, so we don't need to keep the whole thing in memory too.
36568 - Automatically avoid picking more than one node from the same
36569 /16 network when constructing a circuit.
36570 - Revise and clean up the torrc.sample that we ship with; add
36571 a section for BandwidthRate and BandwidthBurst.
36574 - Split circuit_t into origin_circuit_t and or_circuit_t, and
36575 split connection_t into edge, or, dir, control, and base structs.
36576 These will save quite a bit of memory on busy servers, and they'll
36577 also help us track down bugs in the code and bugs in the spec.
36578 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
36579 or later. Log when we are doing this, so we can diagnose it when
36580 it fails. (Also, recommend libevent 1.1b for kqueue and
36581 win32 methods; deprecate libevent 1.0b harder; make libevent
36582 recommendation system saner.)
36583 - Start being able to build universal binaries on OS X (thanks
36585 - Export the default exit policy via the control port, so controllers
36586 don't need to guess what it is / will be later.
36587 - Add a man page entry for ProtocolWarnings.
36588 - Add TestVia config option to the man page.
36589 - Remove even more protocol-related warnings from Tor server logs,
36590 such as bad TLS handshakes and malformed begin cells.
36591 - Stop fetching descriptors if you're not a dir mirror and you
36592 haven't tried to establish any circuits lately. [This currently
36593 causes some dangerous behavior, because when you start up again
36594 you'll use your ancient server descriptors.]
36595 - New DirPort behavior: if you have your dirport set, you download
36596 descriptors aggressively like a directory mirror, whether or not
36597 your ORPort is set.
36598 - Get rid of the router_retry_connections notion. Now routers
36599 no longer try to rebuild long-term connections to directory
36600 authorities, and directory authorities no longer try to rebuild
36601 long-term connections to all servers. We still don't hang up
36602 connections in these two cases though -- we need to look at it
36603 more carefully to avoid flapping, and we likely need to wait til
36604 0.1.1.x is obsolete.
36605 - Drop compatibility with obsolete Tors that permit create cells
36606 to have the wrong circ_id_type.
36607 - Re-enable per-connection rate limiting. Get rid of the "OP
36608 bandwidth" concept. Lay groundwork for "bandwidth classes" --
36609 separate global buckets that apply depending on what sort of conn
36611 - Start publishing one minute or so after we find our ORPort
36612 to be reachable. This will help reduce the number of descriptors
36613 we have for ourselves floating around, since it's quite likely
36614 other things (e.g. DirPort) will change during that minute too.
36615 - Fork the v1 directory protocol into its own spec document,
36616 and mark dir-spec.txt as the currently correct (v2) spec.
36619 - When we find our DirPort to be reachable, publish a new descriptor
36620 so we'll tell the world (reported by pnx).
36621 - Publish a new descriptor after we hup/reload. This is important
36622 if our config has changed such that we'll want to start advertising
36623 our DirPort now, etc.
36624 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36625 - When we have a state file we cannot parse, tell the user and
36626 move it aside. Now we avoid situations where the user starts
36627 Tor in 1904, Tor writes a state file with that timestamp in it,
36628 the user fixes her clock, and Tor refuses to start.
36629 - Fix configure.in to not produce broken configure files with
36630 more recent versions of autoconf. Thanks to Clint for his auto*
36632 - "tor --verify-config" now exits with -1(255) or 0 depending on
36633 whether the config options are bad or good.
36634 - Resolve bug 321 when using dnsworkers: append a period to every
36635 address we resolve at the exit node, so that we do not accidentally
36636 pick up local addresses, and so that failing searches are retried
36637 in the resolver search domains. (This is already solved for
36638 eventdns.) (This breaks Blossom servers for now.)
36639 - If we are using an exit enclave and we can't connect, e.g. because
36640 its webserver is misconfigured to not listen on localhost, then
36641 back off and try connecting from somewhere else before we fail.
36644 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
36645 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
36646 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
36647 when the IP address is mapped through MapAddress to a hostname.
36648 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
36649 useless IPv6 DNS resolves.
36650 - Patch suggested by Karsten Loesing: respond to SIGNAL command
36651 before we execute the signal, in case the signal shuts us down.
36652 - Clean up AllowInvalidNodes man page entry.
36653 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
36654 - Add more asserts to track down an assert error on a windows Tor
36655 server with connection_add being called with socket == -1.
36656 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
36657 - Fix misleading log messages: an entry guard that is "unlisted",
36658 as well as not known to be "down" (because we've never heard
36659 of it), is not therefore "up".
36660 - Remove code to special-case "-cvs" ending, since it has not
36661 actually mattered since 0.0.9.
36662 - Make our socks5 handling more robust to broken socks clients:
36663 throw out everything waiting on the buffer in between socks
36664 handshake phases, since they can't possibly (so the theory
36665 goes) have predicted what we plan to respond to them.
36668 Changes in version 0.1.1.23 - 2006-07-30
36670 - Fast Tor servers, especially exit nodes, were triggering asserts
36671 due to a bug in handling the list of pending DNS resolves. Some
36672 bugs still remain here; we're hunting them.
36673 - Entry guards could crash clients by sending unexpected input.
36674 - More fixes on reachability testing: if you find yourself reachable,
36675 then don't ever make any client requests (so you stop predicting
36676 circuits), then hup or have your clock jump, then later your IP
36677 changes, you won't think circuits are working, so you won't try to
36678 test reachability, so you won't publish.
36681 - Avoid a crash if the controller does a resetconf firewallports
36682 and then a setconf fascistfirewall=1.
36683 - Avoid an integer underflow when the dir authority decides whether
36684 a router is stable: we might wrongly label it stable, and compute
36685 a slightly wrong median stability, when a descriptor is published
36687 - Fix a place where we might trigger an assert if we can't build our
36688 own server descriptor yet.
36691 Changes in version 0.1.1.22 - 2006-07-05
36693 - Fix a big bug that was causing servers to not find themselves
36694 reachable if they changed IP addresses. Since only 0.1.1.22+
36695 servers can do reachability testing correctly, now we automatically
36696 make sure to test via one of these.
36697 - Fix to allow clients and mirrors to learn directory info from
36698 descriptor downloads that get cut off partway through.
36699 - Directory authorities had a bug in deciding if a newly published
36700 descriptor was novel enough to make everybody want a copy -- a few
36701 servers seem to be publishing new descriptors many times a minute.
36703 - Fix a rare bug that was causing some servers to complain about
36704 "closing wedged cpuworkers" and skip some circuit create requests.
36705 - Make the Exit flag in directory status documents actually work.
36708 Changes in version 0.1.1.21 - 2006-06-10
36709 o Crash and assert fixes from 0.1.1.20:
36710 - Fix a rare crash on Tor servers that have enabled hibernation.
36711 - Fix a seg fault on startup for Tor networks that use only one
36712 directory authority.
36713 - Fix an assert from a race condition that occurs on Tor servers
36714 while exiting, where various threads are trying to log that they're
36715 exiting, and delete the logs, at the same time.
36716 - Make our unit tests pass again on certain obscure platforms.
36719 - Add support for building SUSE RPM packages.
36720 - Speed up initial bootstrapping for clients: if we are making our
36721 first ever connection to any entry guard, then don't mark it down
36723 - When only one Tor server in the network is labelled as a guard,
36724 and we've already picked him, we would cycle endlessly picking him
36725 again, being unhappy about it, etc. Now we specifically exclude
36726 current guards when picking a new guard.
36727 - Servers send create cells more reliably after the TLS connection
36728 is established: we were sometimes forgetting to send half of them
36729 when we had more than one pending.
36730 - If we get a create cell that asks us to extend somewhere, but the
36731 Tor server there doesn't match the expected digest, we now send
36732 a destroy cell back, rather than silently doing nothing.
36733 - Make options->RedirectExit work again.
36734 - Make cookie authentication for the controller work again.
36735 - Stop being picky about unusual characters in the arguments to
36736 mapaddress. It's none of our business.
36737 - Add a new config option "TestVia" that lets you specify preferred
36738 middle hops to use for test circuits. Perhaps this will let me
36739 debug the reachability problems better.
36741 o Log / documentation fixes:
36742 - If we're a server and some peer has a broken TLS certificate, don't
36743 log about it unless ProtocolWarnings is set, i.e., we want to hear
36744 about protocol violations by others.
36745 - Fix spelling of VirtualAddrNetwork in man page.
36746 - Add a better explanation at the top of the autogenerated torrc file
36747 about what happened to our old torrc.
36750 Changes in version 0.1.1.20 - 2006-05-23
36752 - Downgrade a log severity where servers complain that they're
36754 - Avoid a compile warning on FreeBSD.
36755 - Remove string size limit on NEWDESC messages; solve bug 291.
36756 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
36757 more thoroughly when we're running on windows.
36760 Changes in version 0.1.1.19-rc - 2006-05-03
36762 - Regenerate our local descriptor if it's dirty and we try to use
36763 it locally (e.g. if it changes during reachability detection).
36764 - If we setconf our ORPort to 0, we continued to listen on the
36765 old ORPort and receive connections.
36766 - Avoid a second warning about machine/limits.h on Debian
36768 - Be willing to add our own routerinfo into the routerlist.
36769 Now authorities will include themselves in their directories
36770 and network-statuses.
36771 - Stop trying to upload rendezvous descriptors to every
36772 directory authority: only try the v1 authorities.
36773 - Servers no longer complain when they think they're not
36774 registered with the directory authorities. There were too many
36776 - Backport dist-rpm changes so rpms can be built without errors.
36779 - Implement an option, VirtualAddrMask, to set which addresses
36780 get handed out in response to mapaddress requests. This works
36781 around a bug in tsocks where 127.0.0.0/8 is never socksified.
36784 Changes in version 0.1.1.18-rc - 2006-04-10
36786 - Work harder to download live network-statuses from all the
36787 directory authorities we know about. Improve the threshold
36788 decision logic so we're more robust to edge cases.
36789 - When fetching rendezvous descriptors, we were willing to ask
36790 v2 authorities too, which would always return 404.
36793 - Stop listing down or invalid nodes in the v1 directory. This will
36794 reduce its bulk by about 1/3, and reduce load on directory
36796 - When deciding whether a router is Fast or Guard-worthy, consider
36797 his advertised BandwidthRate and not just the BandwidthCapacity.
36798 - No longer ship INSTALL and README files -- they are useless now.
36799 - Force rpmbuild to behave and honor target_cpu.
36800 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
36801 - Start to include translated versions of the tor-doc-*.html
36802 files, along with the screenshots. Still needs more work.
36803 - Start sending back 512 and 451 errors if mapaddress fails,
36804 rather than not sending anything back at all.
36805 - When we fail to bind or listen on an incoming or outgoing
36806 socket, we should close it before failing. otherwise we just
36807 leak it. (thanks to weasel for finding.)
36808 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
36809 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
36810 - Make NoPublish (even though deprecated) work again.
36811 - Fix a minor security flaw where a versioning auth dirserver
36812 could list a recommended version many times in a row to make
36813 clients more convinced that it's recommended.
36814 - Fix crash bug if there are two unregistered servers running
36815 with the same nickname, one of them is down, and you ask for
36816 them by nickname in your EntryNodes or ExitNodes. Also, try
36817 to pick the one that's running rather than an arbitrary one.
36818 - Fix an infinite loop we could hit if we go offline for too long.
36819 - Complain when we hit WSAENOBUFS on recv() or write() too.
36820 Perhaps this will help us hunt the bug.
36821 - If you're not a versioning dirserver, don't put the string
36822 "client-versions \nserver-versions \n" in your network-status.
36823 - Lower the minimum required number of file descriptors to 1000,
36824 so we can have some overhead for Valgrind on Linux, where the
36825 default ulimit -n is 1024.
36828 - Add tor.dizum.com as the fifth authoritative directory server.
36829 - Add a new config option FetchUselessDescriptors, off by default,
36830 for when you plan to run "exitlist" on your client and you want
36831 to know about even the non-running descriptors.
36834 Changes in version 0.1.1.17-rc - 2006-03-28
36836 - Clients and servers since 0.1.1.10-alpha have been expiring
36837 connections whenever they are idle for 5 minutes and they *do*
36838 have circuits on them. Oops. With this new version, clients will
36839 discard their previous entry guard choices and avoid choosing
36840 entry guards running these flawed versions.
36841 - Fix memory leak when uncompressing concatenated zlib streams. This
36842 was causing substantial leaks over time on Tor servers.
36843 - The v1 directory was including servers as much as 48 hours old,
36844 because that's how the new routerlist->routers works. Now only
36845 include them if they're 20 hours old or less.
36848 - Resume building on irix64, netbsd 2.0, etc.
36849 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
36851 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
36852 and it is confusing some users.
36853 - Mirrors stop caching the v1 directory so often.
36854 - Make the max number of old descriptors that a cache will hold
36855 rise with the number of directory authorities, so we can scale.
36856 - Change our win32 uname() hack to be more forgiving about what
36857 win32 versions it thinks it's found.
36860 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
36862 - When the controller's *setconf commands fail, collect an error
36863 message in a string and hand it back to the controller.
36864 - Make the v2 dir's "Fast" flag based on relative capacity, just
36865 like "Stable" is based on median uptime. Name everything in the
36866 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
36867 - Log server fingerprint on startup, so new server operators don't
36868 have to go hunting around their filesystem for it.
36869 - Return a robots.txt on our dirport to discourage google indexing.
36870 - Let the controller ask for GETINFO dir/status/foo so it can ask
36871 directly rather than connecting to the dir port. Only works when
36872 dirport is set for now.
36874 o New config options rather than constants in the code:
36875 - SocksTimeout: How long do we let a socks connection wait
36876 unattached before we fail it?
36877 - CircuitBuildTimeout: Cull non-open circuits that were born
36878 at least this many seconds ago.
36879 - CircuitIdleTimeout: Cull open clean circuits that were born
36880 at least this many seconds ago.
36883 Changes in version 0.1.1.16-rc - 2006-03-18
36884 o Bugfixes on 0.1.1.15-rc:
36885 - Fix assert when the controller asks to attachstream a connect-wait
36886 or resolve-wait stream.
36887 - Now do address rewriting when the controller asks us to attach
36888 to a particular circuit too. This will let Blossom specify
36889 "moria2.exit" without having to learn what moria2's IP address is.
36890 - Make the "tor --verify-config" command-line work again, so people
36891 can automatically check if their torrc will parse.
36892 - Authoritative dirservers no longer require an open connection from
36893 a server to consider him "reachable". We need this change because
36894 when we add new auth dirservers, old servers won't know not to
36896 - Let Tor build on Sun CC again.
36897 - Fix an off-by-one buffer size in dirserv.c that magically never
36898 hit our three authorities but broke sjmurdoch's own tor network.
36899 - If we as a directory mirror don't know of any v1 directory
36900 authorities, then don't try to cache any v1 directories.
36901 - Stop warning about unknown servers in our family when they are
36902 given as hex digests.
36903 - Stop complaining as quickly to the server operator that he
36904 hasn't registered his nickname/key binding.
36905 - Various cleanups so we can add new V2 Auth Dirservers.
36906 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
36907 reflect the updated flags in our v2 dir protocol.
36908 - Resume allowing non-printable characters for exit streams (both
36909 for connecting and for resolving). Now we tolerate applications
36910 that don't follow the RFCs. But continue to block malformed names
36913 o Bugfixes on 0.1.0.x:
36914 - Fix assert bug in close_logs(): when we close and delete logs,
36915 remove them all from the global "logfiles" list.
36916 - Fix minor integer overflow in calculating when we expect to use up
36917 our bandwidth allocation before hibernating.
36918 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
36919 there are multiple SSLs installed with different versions.
36920 - When we try to be a server and Address is not explicitly set and
36921 our hostname resolves to a private IP address, try to use an
36922 interface address if it has a public address. Now Windows machines
36923 that think of themselves as localhost can work by default.
36926 - Let the controller ask for GETINFO dir/server/foo so it can ask
36927 directly rather than connecting to the dir port.
36928 - Let the controller tell us about certain router descriptors
36929 that it doesn't want Tor to use in circuits. Implement
36930 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
36931 - New config option SafeSocks to reject all application connections
36932 using unsafe socks protocols. Defaults to off.
36935 Changes in version 0.1.1.15-rc - 2006-03-11
36936 o Bugfixes and cleanups:
36937 - When we're printing strings from the network, don't try to print
36938 non-printable characters. This protects us against shell escape
36939 sequence exploits, and also against attacks to fool humans into
36940 misreading their logs.
36941 - Fix a bug where Tor would fail to establish any connections if you
36942 left it off for 24 hours and then started it: we were happy with
36943 the obsolete network statuses, but they all referred to router
36944 descriptors that were too old to fetch, so we ended up with no
36945 valid router descriptors.
36946 - Fix a seg fault in the controller's "getinfo orconn-status"
36947 command while listing status on incoming handshaking connections.
36948 Introduce a status name "NEW" for these connections.
36949 - If we get a linelist or linelist_s config option from the torrc
36950 (e.g. ExitPolicy) and it has no value, warn and skip rather than
36951 silently resetting it to its default.
36952 - Don't abandon entry guards until they've been down or gone for
36954 - Cleaner and quieter log messages.
36957 - New controller signal NEWNYM that makes new application requests
36958 use clean circuits.
36959 - Add a new circuit purpose 'controller' to let the controller ask
36960 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
36961 controller command to let you specify the purpose if you're
36962 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
36963 command to let you change a circuit's purpose after it's been
36965 - Accept "private:*" in routerdesc exit policies; not generated yet
36966 because older Tors do not understand it.
36967 - Add BSD-style contributed startup script "rc.subr" from Peter
36971 Changes in version 0.1.1.14-alpha - 2006-02-20
36972 o Bugfixes on 0.1.1.x:
36973 - Don't die if we ask for a stdout or stderr log (even implicitly)
36974 and we're set to RunAsDaemon -- just warn.
36975 - We still had a few bugs in the OR connection rotation code that
36976 caused directory servers to slowly aggregate connections to other
36977 fast Tor servers. This time for sure!
36978 - Make log entries on Win32 include the name of the function again.
36979 - We were treating a pair of exit policies if they were equal even
36980 if one said accept and the other said reject -- causing us to
36981 not always publish a new descriptor since we thought nothing
36983 - Retry pending server downloads as well as pending networkstatus
36984 downloads when we unexpectedly get a socks request.
36985 - We were ignoring the IS_FAST flag in the directory status,
36986 meaning we were willing to pick trivial-bandwidth nodes for "fast"
36988 - If the controller's SAVECONF command fails (e.g. due to file
36989 permissions), let the controller know that it failed.
36992 - If we're trying to be a Tor server and running Windows 95/98/ME
36993 as a server, explain that we'll likely crash.
36994 - When we're a server, a client asks for an old-style directory,
36995 and our write bucket is empty, don't give it to him. This way
36996 small servers can continue to serve the directory *sometimes*,
36997 without getting overloaded.
36998 - Compress exit policies even more -- look for duplicate lines
37000 - Clients now honor the "guard" flag in the router status when
37001 picking entry guards, rather than looking at is_fast or is_stable.
37002 - Retain unrecognized lines in $DATADIR/state file, so that we can
37003 be forward-compatible.
37004 - Generate 18.0.0.0/8 address policy format in descs when we can;
37005 warn when the mask is not reducible to a bit-prefix.
37006 - Let the user set ControlListenAddress in the torrc. This can be
37007 dangerous, but there are some cases (like a secured LAN) where it
37009 - Split ReachableAddresses into ReachableDirAddresses and
37010 ReachableORAddresses, so we can restrict Dir conns to port 80
37011 and OR conns to port 443.
37012 - Now we can target arch and OS in rpm builds (contributed by
37013 Phobos). Also make the resulting dist-rpm filename match the
37015 - New config options to help controllers: FetchServerDescriptors
37016 and FetchHidServDescriptors for whether to fetch server
37017 info and hidserv info or let the controller do it, and
37018 PublishServerDescriptor and PublishHidServDescriptors.
37019 - Also let the controller set the __AllDirActionsPrivate config
37020 option if you want all directory fetches/publishes to happen via
37021 Tor (it assumes your controller bootstraps your circuits).
37024 Changes in version 0.1.0.17 - 2006-02-17
37025 o Crash bugfixes on 0.1.0.x:
37026 - When servers with a non-zero DirPort came out of hibernation,
37027 sometimes they would trigger an assert.
37029 o Other important bugfixes:
37030 - On platforms that don't have getrlimit (like Windows), we were
37031 artificially constraining ourselves to a max of 1024
37032 connections. Now just assume that we can handle as many as 15000
37033 connections. Hopefully this won't cause other problems.
37035 o Backported features:
37036 - When we're a server, a client asks for an old-style directory,
37037 and our write bucket is empty, don't give it to him. This way
37038 small servers can continue to serve the directory *sometimes*,
37039 without getting overloaded.
37040 - Whenever you get a 503 in response to a directory fetch, try
37041 once more. This will become important once servers start sending
37042 503's whenever they feel busy.
37043 - Fetch a new directory every 120 minutes, not every 40 minutes.
37044 Now that we have hundreds of thousands of users running the old
37045 directory algorithm, it's starting to hurt a lot.
37046 - Bump up the period for forcing a hidden service descriptor upload
37047 from 20 minutes to 1 hour.
37050 Changes in version 0.1.1.13-alpha - 2006-02-09
37051 o Crashes in 0.1.1.x:
37052 - When you tried to setconf ORPort via the controller, Tor would
37053 crash. So people using TorCP to become a server were sad.
37054 - Solve (I hope) the stack-smashing bug that we were seeing on fast
37055 servers. The problem appears to be something do with OpenSSL's
37056 random number generation, or how we call it, or something. Let me
37057 know if the crashes continue.
37058 - Turn crypto hardware acceleration off by default, until we find
37059 somebody smart who can test it for us. (It appears to produce
37060 seg faults in at least some cases.)
37061 - Fix a rare assert error when we've tried all intro points for
37062 a hidden service and we try fetching the service descriptor again:
37063 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
37066 - Fix a major load balance bug: we were round-robining in 16 KB
37067 chunks, and servers with bandwidthrate of 20 KB, while downloading
37068 a 600 KB directory, would starve their other connections. Now we
37069 try to be a bit more fair.
37070 - Dir authorities and mirrors were never expiring the newest
37071 descriptor for each server, causing memory and directory bloat.
37072 - Fix memory-bloating and connection-bloating bug on servers: We
37073 were never closing any connection that had ever had a circuit on
37074 it, because we were checking conn->n_circuits == 0, yet we had a
37075 bug that let it go negative.
37076 - Make Tor work using squid as your http proxy again -- squid
37077 returns an error if you ask for a URL that's too long, and it uses
37078 a really generic error message. Plus, many people are behind a
37079 transparent squid so they don't even realize it.
37080 - On platforms that don't have getrlimit (like Windows), we were
37081 artificially constraining ourselves to a max of 1024
37082 connections. Now just assume that we can handle as many as 15000
37083 connections. Hopefully this won't cause other problems.
37084 - Add a new config option ExitPolicyRejectPrivate which defaults to
37085 1. This means all exit policies will begin with rejecting private
37086 addresses, unless the server operator explicitly turns it off.
37089 - Clients no longer download descriptors for non-running
37091 - Before we add new directory authorities, we should make it
37092 clear that only v1 authorities should receive/publish hidden
37093 service descriptors.
37096 - As soon as we've fetched some more directory info, immediately
37097 try to download more server descriptors. This way we don't have
37098 a 10 second pause during initial bootstrapping.
37099 - Remove even more loud log messages that the server operator can't
37101 - When we're running an obsolete or un-recommended version, make
37102 the log message more clear about what the problem is and what
37103 versions *are* still recommended.
37104 - Provide a more useful warn message when our onion queue gets full:
37105 the CPU is too slow or the exit policy is too liberal.
37106 - Don't warn when we receive a 503 from a dirserver/cache -- this
37107 will pave the way for them being able to refuse if they're busy.
37108 - When we fail to bind a listener, try to provide a more useful
37109 log message: e.g., "Is Tor already running?"
37110 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
37111 Goldberg can prove things about our handshake protocol more
37113 - MaxConn has been obsolete for a while now. Document the ConnLimit
37114 config option, which is a *minimum* number of file descriptors
37115 that must be available else Tor refuses to start.
37116 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
37117 if you log to syslog and want something other than LOG_DAEMON.
37118 - Make dirservers generate a separate "guard" flag to mean,
37119 "would make a good entry guard". Make clients parse it and vote
37120 on it. Not used by clients yet.
37121 - Implement --with-libevent-dir option to ./configure. Also, improve
37122 search techniques to find libevent, and use those for openssl too.
37123 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
37124 - Only start testing reachability once we've established a
37125 circuit. This will make startup on dirservers less noisy.
37126 - Don't try to upload hidden service descriptors until we have
37127 established a circuit.
37128 - Fix the controller's "attachstream 0" command to treat conn like
37129 it just connected, doing address remapping, handling .exit and
37130 .onion idioms, and so on. Now we're more uniform in making sure
37131 that the controller hears about new and closing connections.
37134 Changes in version 0.1.1.12-alpha - 2006-01-11
37135 o Bugfixes on 0.1.1.x:
37136 - The fix to close duplicate server connections was closing all
37137 Tor client connections if they didn't establish a circuit
37138 quickly enough. Oops.
37139 - Fix minor memory issue (double-free) that happened on exit.
37141 o Bugfixes on 0.1.0.x:
37142 - Tor didn't warn when it failed to open a log file.
37145 Changes in version 0.1.1.11-alpha - 2006-01-10
37146 o Crashes in 0.1.1.x:
37147 - Include all the assert/crash fixes from 0.1.0.16.
37148 - If you start Tor and then quit very quickly, there were some
37149 races that tried to free things that weren't allocated yet.
37150 - Fix a rare memory stomp if you're running hidden services.
37151 - Fix segfault when specifying DirServer in config without nickname.
37152 - Fix a seg fault when you finish connecting to a server but at
37153 that moment you dump his server descriptor.
37154 - Extendcircuit and Attachstream controller commands would
37155 assert/crash if you don't give them enough arguments.
37156 - Fix an assert error when we're out of space in the connection_list
37157 and we try to post a hidden service descriptor (reported by weasel).
37158 - If you specify a relative torrc path and you set RunAsDaemon in
37159 your torrc, then it chdir()'s to the new directory. If you HUP,
37160 it tries to load the new torrc location, fails, and exits.
37161 The fix: no longer allow a relative path to torrc using -f.
37164 - Implement "entry guards": automatically choose a handful of entry
37165 nodes and stick with them for all circuits. Only pick new guards
37166 when the ones you have are unsuitable, and if the old guards
37167 become suitable again, switch back. This will increase security
37168 dramatically against certain end-point attacks. The EntryNodes
37169 config option now provides some hints about which entry guards you
37170 want to use most; and StrictEntryNodes means to only use those.
37171 - New directory logic: download by descriptor digest, not by
37172 fingerprint. Caches try to download all listed digests from
37173 authorities; clients try to download "best" digests from caches.
37174 This avoids partitioning and isolating attacks better.
37175 - Make the "stable" router flag in network-status be the median of
37176 the uptimes of running valid servers, and make clients pay
37177 attention to the network-status flags. Thus the cutoff adapts
37178 to the stability of the network as a whole, making IRC, IM, etc
37179 connections more reliable.
37182 - Tor servers with dynamic IP addresses were needing to wait 18
37183 hours before they could start doing reachability testing using
37184 the new IP address and ports. This is because they were using
37185 the internal descriptor to learn what to test, yet they were only
37186 rebuilding the descriptor once they decided they were reachable.
37187 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
37188 to download certain server descriptors, throw them away, and then
37189 fetch them again after 30 minutes. Now mirrors throw away these
37190 server descriptors so clients can't get them.
37191 - We were leaving duplicate connections to other ORs open for a week,
37192 rather than closing them once we detect a duplicate. This only
37193 really affected authdirservers, but it affected them a lot.
37194 - Spread the authdirservers' reachability testing over the entire
37195 testing interval, so we don't try to do 500 TLS's at once every
37199 - If the network is down, and we try to connect to a conn because
37200 we have a circuit in mind, and we timeout (30 seconds) because the
37201 network never answers, we were expiring the circuit, but we weren't
37202 obsoleting the connection or telling the entry_guards functions.
37203 - Some Tor servers process billions of cells per day. These statistics
37204 need to be uint64_t's.
37205 - Check for integer overflows in more places, when adding elements
37206 to smartlists. This could possibly prevent a buffer overflow
37207 on malicious huge inputs. I don't see any, but I haven't looked
37209 - ReachableAddresses kept growing new "reject *:*" lines on every
37211 - When you "setconf log" via the controller, it should remove all
37212 logs. We were automatically adding back in a "log notice stdout".
37213 - Newly bootstrapped Tor networks couldn't establish hidden service
37214 circuits until they had nodes with high uptime. Be more tolerant.
37215 - We were marking servers down when they could not answer every piece
37216 of the directory request we sent them. This was far too harsh.
37217 - Fix the torify (tsocks) config file to not use Tor for localhost
37219 - Directory authorities now go to the proper authority when asking for
37220 a networkstatus, even when they want a compressed one.
37221 - Fix a harmless bug that was causing Tor servers to log
37222 "Got an end because of misc error, but we're not an AP. Closing."
37223 - Authorities were treating their own descriptor changes as cosmetic,
37224 meaning the descriptor available in the network-status and the
37225 descriptor that clients downloaded were different.
37226 - The OS X installer was adding a symlink for tor_resolve but
37227 the binary was called tor-resolve (reported by Thomas Hardly).
37228 - Workaround a problem with some http proxies where they refuse GET
37229 requests that specify "Content-Length: 0" (reported by Adrian).
37230 - Fix wrong log message when you add a "HiddenServiceNodes" config
37231 line without any HiddenServiceDir line (reported by Chris Thomas).
37234 - Write the TorVersion into the state file so we have a prayer of
37235 keeping forward and backward compatibility.
37236 - Revive the FascistFirewall config option rather than eliminating it:
37237 now it's a synonym for ReachableAddresses *:80,*:443.
37238 - Clients choose directory servers from the network status lists,
37239 not from their internal list of router descriptors. Now they can
37240 go to caches directly rather than needing to go to authorities
37242 - Directory authorities ignore router descriptors that have only
37243 cosmetic differences: do this for 0.1.0.x servers now too.
37244 - Add a new flag to network-status indicating whether the server
37245 can answer v2 directory requests too.
37246 - Authdirs now stop whining so loudly about bad descriptors that
37247 they fetch from other dirservers. So when there's a log complaint,
37248 it's for sure from a freshly uploaded descriptor.
37249 - Reduce memory requirements in our structs by changing the order
37251 - There used to be two ways to specify your listening ports in a
37252 server descriptor: on the "router" line and with a separate "ports"
37253 line. Remove support for the "ports" line.
37254 - New config option "AuthDirRejectUnlisted" for auth dirservers as
37255 a panic button: if we get flooded with unusable servers we can
37256 revert to only listing servers in the approved-routers file.
37257 - Auth dir servers can now mark a fingerprint as "!reject" or
37258 "!invalid" in the approved-routers file (as its nickname), to
37259 refuse descriptors outright or include them but marked as invalid.
37260 - Servers store bandwidth history across restarts/crashes.
37261 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
37262 get a better idea of why their circuits failed. Not used yet.
37263 - Directory mirrors now cache up to 16 unrecognized network-status
37264 docs. Now we can add new authdirservers and they'll be cached too.
37265 - When picking a random directory, prefer non-authorities if any
37267 - New controller option "getinfo desc/all-recent" to fetch the
37268 latest server descriptor for every router that Tor knows about.
37271 Changes in version 0.1.0.16 - 2006-01-02
37272 o Crash bugfixes on 0.1.0.x:
37273 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
37274 corrupting the heap, losing FDs, or crashing when we need to resize
37275 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
37276 - It turns out sparc64 platforms crash on unaligned memory access
37277 too -- so detect and avoid this.
37278 - Handle truncated compressed data correctly (by detecting it and
37280 - Fix possible-but-unlikely free(NULL) in control.c.
37281 - When we were closing connections, there was a rare case that
37282 stomped on memory, triggering seg faults and asserts.
37283 - Avoid potential infinite recursion when building a descriptor. (We
37284 don't know that it ever happened, but better to fix it anyway.)
37285 - We were neglecting to unlink marked circuits from soon-to-close OR
37286 connections, which caused some rare scribbling on freed memory.
37287 - Fix a memory stomping race bug when closing the joining point of two
37288 rendezvous circuits.
37289 - Fix an assert in time parsing found by Steven Murdoch.
37291 o Other bugfixes on 0.1.0.x:
37292 - When we're doing reachability testing, provide more useful log
37293 messages so the operator knows what to expect.
37294 - Do not check whether DirPort is reachable when we are suppressing
37295 advertising it because of hibernation.
37296 - When building with -static or on Solaris, we sometimes needed -ldl.
37297 - When we're deciding whether a stream has enough circuits around
37298 that can handle it, count the freshly dirty ones and not the ones
37299 that are so dirty they won't be able to handle it.
37300 - When we're expiring old circuits, we had a logic error that caused
37301 us to close new rendezvous circuits rather than old ones.
37302 - Give a more helpful log message when you try to change ORPort via
37303 the controller: you should upgrade Tor if you want that to work.
37304 - We were failing to parse Tor versions that start with "Tor ".
37305 - Tolerate faulty streams better: when a stream fails for reason
37306 exitpolicy, stop assuming that the router is lying about his exit
37307 policy. When a stream fails for reason misc, allow it to retry just
37308 as if it was resolvefailed. When a stream has failed three times,
37309 reset its failure count so we can try again and get all three tries.
37312 Changes in version 0.1.1.10-alpha - 2005-12-11
37313 o Correctness bugfixes on 0.1.0.x:
37314 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
37315 corrupting the heap, losing FDs, or crashing when we need to resize
37316 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
37317 - Stop doing the complex voodoo overkill checking for insecure
37318 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
37319 - When we were closing connections, there was a rare case that
37320 stomped on memory, triggering seg faults and asserts.
37321 - We were neglecting to unlink marked circuits from soon-to-close OR
37322 connections, which caused some rare scribbling on freed memory.
37323 - When we're deciding whether a stream has enough circuits around
37324 that can handle it, count the freshly dirty ones and not the ones
37325 that are so dirty they won't be able to handle it.
37326 - Recover better from TCP connections to Tor servers that are
37327 broken but don't tell you (it happens!); and rotate TLS
37328 connections once a week.
37329 - When we're expiring old circuits, we had a logic error that caused
37330 us to close new rendezvous circuits rather than old ones.
37331 - Fix a scary-looking but apparently harmless bug where circuits
37332 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
37333 servers, and never switch to state CIRCUIT_STATE_OPEN.
37334 - When building with -static or on Solaris, we sometimes needed to
37336 - Give a useful message when people run Tor as the wrong user,
37337 rather than telling them to start chowning random directories.
37338 - We were failing to inform the controller about new .onion streams.
37340 o Security bugfixes on 0.1.0.x:
37341 - Refuse server descriptors if the fingerprint line doesn't match
37342 the included identity key. Tor doesn't care, but other apps (and
37343 humans) might actually be trusting the fingerprint line.
37344 - We used to kill the circuit when we receive a relay command we
37345 don't recognize. Now we just drop it.
37346 - Start obeying our firewall options more rigorously:
37347 . If we can't get to a dirserver directly, try going via Tor.
37348 . Don't ever try to connect (as a client) to a place our
37349 firewall options forbid.
37350 . If we specify a proxy and also firewall options, obey the
37351 firewall options even when we're using the proxy: some proxies
37352 can only proxy to certain destinations.
37353 - Fix a bug found by Lasse Overlier: when we were making internal
37354 circuits (intended to be cannibalized later for rendezvous and
37355 introduction circuits), we were picking them so that they had
37356 useful exit nodes. There was no need for this, and it actually
37357 aids some statistical attacks.
37358 - Start treating internal circuits and exit circuits separately.
37359 It's important to keep them separate because internal circuits
37360 have their last hops picked like middle hops, rather than like
37361 exit hops. So exiting on them will break the user's expectations.
37363 o Bugfixes on 0.1.1.x:
37364 - Take out the mis-feature where we tried to detect IP address
37365 flapping for people with DynDNS, and chose not to upload a new
37366 server descriptor sometimes.
37367 - Try to be compatible with OpenSSL 0.9.6 again.
37368 - Log fix: when the controller is logging about .onion addresses,
37369 sometimes it didn't include the ".onion" part of the address.
37370 - Don't try to modify options->DirServers internally -- if the
37371 user didn't specify any, just add the default ones directly to
37372 the trusted dirserver list. This fixes a bug where people running
37373 controllers would use SETCONF on some totally unrelated config
37374 option, and Tor would start yelling at them about changing their
37376 - Let the controller's redirectstream command specify a port, in
37377 case the controller wants to change that too.
37378 - When we requested a pile of server descriptors, we sometimes
37379 accidentally launched a duplicate request for the first one.
37380 - Bugfix for trackhostexits: write down the fingerprint of the
37381 chosen exit, not its nickname, because the chosen exit might not
37383 - When parsing foo.exit, if foo is unknown, and we are leaving
37384 circuits unattached, set the chosen_exit field and leave the
37385 address empty. This matters because controllers got confused
37387 - Directory authorities no longer try to download server
37388 descriptors that they know they will reject.
37390 o Features and updates:
37391 - Replace balanced trees with hash tables: this should make stuff
37392 significantly faster.
37393 - Resume using the AES counter-mode implementation that we ship,
37394 rather than OpenSSL's. Ours is significantly faster.
37395 - Many other CPU and memory improvements.
37396 - Add a new config option FastFirstHopPK (on by default) so clients
37397 do a trivial crypto handshake for their first hop, since TLS has
37398 already taken care of confidentiality and authentication.
37399 - Add a new config option TestSocks so people can see if their
37400 applications are using socks4, socks4a, socks5-with-ip, or
37401 socks5-with-hostname. This way they don't have to keep mucking
37402 with tcpdump and wondering if something got cached somewhere.
37403 - Warn when listening on a public address for socks. I suspect a
37404 lot of people are setting themselves up as open socks proxies,
37405 and they have no idea that jerks on the Internet are using them,
37406 since they simply proxy the traffic into the Tor network.
37407 - Add "private:*" as an alias in configuration for policies. Now
37408 you can simplify your exit policy rather than needing to list
37409 every single internal or nonroutable network space.
37410 - Add a new controller event type that allows controllers to get
37411 all server descriptors that were uploaded to a router in its role
37412 as authoritative dirserver.
37413 - Start shipping socks-extensions.txt, tor-doc-unix.html,
37414 tor-doc-server.html, and stylesheet.css in the tarball.
37415 - Stop shipping tor-doc.html in the tarball.
37418 Changes in version 0.1.1.9-alpha - 2005-11-15
37419 o Usability improvements:
37420 - Start calling it FooListenAddress rather than FooBindAddress,
37421 since few of our users know what it means to bind an address
37423 - Reduce clutter in server logs. We're going to try to make
37424 them actually usable now. New config option ProtocolWarnings that
37425 lets you hear about how _other Tors_ are breaking the protocol. Off
37427 - Divide log messages into logging domains. Once we put some sort
37428 of interface on this, it will let people looking at more verbose
37429 log levels specify the topics they want to hear more about.
37430 - Make directory servers return better http 404 error messages
37431 instead of a generic "Servers unavailable".
37432 - Check for even more Windows version flags when writing the platform
37433 string in server descriptors, and note any we don't recognize.
37434 - Clean up more of the OpenSSL memory when exiting, so we can detect
37435 memory leaks better.
37436 - Make directory authorities be non-versioning, non-naming by
37437 default. Now we can add new directory servers without requiring
37438 their operators to pay close attention.
37439 - When logging via syslog, include the pid whenever we provide
37440 a log entry. Suggested by Todd Fries.
37442 o Performance improvements:
37443 - Directory servers now silently throw away new descriptors that
37444 haven't changed much if the timestamps are similar. We do this to
37445 tolerate older Tor servers that upload a new descriptor every 15
37446 minutes. (It seemed like a good idea at the time.)
37447 - Inline bottleneck smartlist functions; use fast versions by default.
37448 - Add a "Map from digest to void*" abstraction digestmap_t so we
37449 can do less hex encoding/decoding. Use it in router_get_by_digest()
37450 to resolve a performance bottleneck.
37451 - Allow tor_gzip_uncompress to extract as much as possible from
37452 truncated compressed data. Try to extract as many
37453 descriptors as possible from truncated http responses (when
37454 DIR_PURPOSE_FETCH_ROUTERDESC).
37455 - Make circ->onionskin a pointer, not a static array. moria2 was using
37456 125000 circuit_t's after it had been up for a few weeks, which
37457 translates to 20+ megs of wasted space.
37458 - The private half of our EDH handshake keys are now chosen out
37459 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
37461 o Security improvements:
37462 - Start making directory caches retain old routerinfos, so soon
37463 clients can start asking by digest of descriptor rather than by
37464 fingerprint of server.
37465 - Add half our entropy from RAND_poll in OpenSSL. This knows how
37466 to use egd (if present), openbsd weirdness (if present), vms/os2
37467 weirdness (if we ever port there), and more in the future.
37469 o Bugfixes on 0.1.0.x:
37470 - Do round-robin writes of at most 16 kB per write. This might be
37471 more fair on loaded Tor servers, and it might resolve our Windows
37472 crash bug. It might also slow things down.
37473 - Our TLS handshakes were generating a single public/private
37474 keypair for the TLS context, rather than making a new one for
37475 each new connections. Oops. (But we were still rotating them
37476 periodically, so it's not so bad.)
37477 - When we were cannibalizing a circuit with a particular exit
37478 node in mind, we weren't checking to see if that exit node was
37479 already present earlier in the circuit. Oops.
37480 - When a Tor server's IP changes (e.g. from a dyndns address),
37481 upload a new descriptor so clients will learn too.
37482 - Really busy servers were keeping enough circuits open on stable
37483 connections that they were wrapping around the circuit_id
37484 space. (It's only two bytes.) This exposed a bug where we would
37485 feel free to reuse a circuit_id even if it still exists but has
37486 been marked for close. Try to fix this bug. Some bug remains.
37487 - If we would close a stream early (e.g. it asks for a .exit that
37488 we know would refuse it) but the LeaveStreamsUnattached config
37489 option is set by the controller, then don't close it.
37491 o Bugfixes on 0.1.1.8-alpha:
37492 - Fix a big pile of memory leaks, some of them serious.
37493 - Do not try to download a routerdesc if we would immediately reject
37495 - Resume inserting a newline between all router descriptors when
37496 generating (old style) signed directories, since our spec says
37498 - When providing content-type application/octet-stream for
37499 server descriptors using .z, we were leaving out the
37500 content-encoding header. Oops. (Everything tolerated this just
37501 fine, but that doesn't mean we need to be part of the problem.)
37502 - Fix a potential seg fault in getconf and getinfo using version 1
37503 of the controller protocol.
37504 - Avoid crash: do not check whether DirPort is reachable when we
37505 are suppressing it because of hibernation.
37506 - Make --hash-password not crash on exit.
37509 Changes in version 0.1.1.8-alpha - 2005-10-07
37510 o New features (major):
37511 - Clients don't download or use the directory anymore. Now they
37512 download and use network-statuses from the trusted dirservers,
37513 and fetch individual server descriptors as needed from mirrors.
37514 See dir-spec.txt for all the gory details.
37515 - Be more conservative about whether to advertise our DirPort.
37516 The main change is to not advertise if we're running at capacity
37517 and either a) we could hibernate or b) our capacity is low and
37518 we're using a default DirPort.
37519 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
37521 o New features (minor):
37522 - Try to be smart about when to retry network-status and
37523 server-descriptor fetches. Still needs some tuning.
37524 - Stop parsing, storing, or using running-routers output (but
37525 mirrors still cache and serve it).
37526 - Consider a threshold of versioning dirservers (dirservers who have
37527 an opinion about which Tor versions are still recommended) before
37528 deciding whether to warn the user that he's obsolete.
37529 - Dirservers can now reject/invalidate by key and IP, with the
37530 config options "AuthDirInvalid" and "AuthDirReject". This is
37531 useful since currently we automatically list servers as running
37532 and usable even if we know they're jerks.
37533 - Provide dire warnings to any users who set DirServer; move it out
37534 of torrc.sample and into torrc.complete.
37535 - Add MyFamily to torrc.sample in the server section.
37536 - Add nicknames to the DirServer line, so we can refer to them
37537 without requiring all our users to memorize their IP addresses.
37538 - When we get an EOF or a timeout on a directory connection, note
37539 how many bytes of serverdesc we are dropping. This will help
37540 us determine whether it is smart to parse incomplete serverdesc
37542 - Add a new function to "change pseudonyms" -- that is, to stop
37543 using any currently-dirty circuits for new streams, so we don't
37544 link new actions to old actions. Currently it's only called on
37545 HUP (or SIGNAL RELOAD).
37546 - On sighup, if UseHelperNodes changed to 1, use new circuits.
37547 - Start using RAND_bytes rather than RAND_pseudo_bytes from
37548 OpenSSL. Also, reseed our entropy every hour, not just at
37549 startup. And entropy in 512-bit chunks, not 160-bit chunks.
37551 o Fixes on 0.1.1.7-alpha:
37552 - Nobody ever implemented EVENT_ADDRMAP for control protocol
37553 version 0, so don't let version 0 controllers ask for it.
37554 - If you requested something with too many newlines via the
37555 v1 controller protocol, you could crash tor.
37556 - Fix a number of memory leaks, including some pretty serious ones.
37557 - Re-enable DirPort testing again, so Tor servers will be willing
37558 to advertise their DirPort if it's reachable.
37559 - On TLS handshake, only check the other router's nickname against
37560 its expected nickname if is_named is set.
37562 o Fixes forward-ported from 0.1.0.15:
37563 - Don't crash when we don't have any spare file descriptors and we
37564 try to spawn a dns or cpu worker.
37565 - Make the numbers in read-history and write-history into uint64s,
37566 so they don't overflow and publish negatives in the descriptor.
37568 o Fixes on 0.1.0.x:
37569 - For the OS X package's modified privoxy config file, comment
37570 out the "logfile" line so we don't log everything passed
37572 - We were whining about using socks4 or socks5-with-local-lookup
37573 even when it's an IP in the "virtual" range we designed exactly
37575 - We were leaking some memory every time the client changes IPs.
37576 - Never call free() on tor_malloc()d memory. This will help us
37577 use dmalloc to detect memory leaks.
37578 - Check for named servers when looking them up by nickname;
37579 warn when we'recalling a non-named server by its nickname;
37580 don't warn twice about the same name.
37581 - Try to list MyFamily elements by key, not by nickname, and warn
37582 if we've not heard of the server.
37583 - Make windows platform detection (uname equivalent) smarter.
37584 - It turns out sparc64 doesn't like unaligned access either.
37587 Changes in version 0.1.0.15 - 2005-09-23
37588 o Bugfixes on 0.1.0.x:
37589 - Reject ports 465 and 587 (spam targets) in default exit policy.
37590 - Don't crash when we don't have any spare file descriptors and we
37591 try to spawn a dns or cpu worker.
37592 - Get rid of IgnoreVersion undocumented config option, and make us
37593 only warn, never exit, when we're running an obsolete version.
37594 - Don't try to print a null string when your server finds itself to
37595 be unreachable and the Address config option is empty.
37596 - Make the numbers in read-history and write-history into uint64s,
37597 so they don't overflow and publish negatives in the descriptor.
37598 - Fix a minor memory leak in smartlist_string_remove().
37599 - We were only allowing ourselves to upload a server descriptor at
37600 most every 20 minutes, even if it changed earlier than that.
37601 - Clean up log entries that pointed to old URLs.
37604 Changes in version 0.1.1.7-alpha - 2005-09-14
37605 o Fixes on 0.1.1.6-alpha:
37606 - Exit servers were crashing when people asked them to make a
37607 connection to an address not in their exit policy.
37608 - Looking up a non-existent stream for a v1 control connection would
37610 - Fix a seg fault if we ask a dirserver for a descriptor by
37611 fingerprint but he doesn't know about him.
37612 - SETCONF was appending items to linelists, not clearing them.
37613 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
37614 out and refuse the setconf if it would fail.
37615 - Downgrade the dirserver log messages when whining about
37619 - Add Peter Palfrader's check-tor script to tor/contrib/
37620 It lets you easily check whether a given server (referenced by
37621 nickname) is reachable by you.
37622 - Numerous changes to move towards client-side v2 directories. Not
37625 o Fixes on 0.1.0.x:
37626 - If the user gave tor an odd number of command-line arguments,
37627 we were silently ignoring the last one. Now we complain and fail.
37628 [This wins the oldest-bug prize -- this bug has been present since
37629 November 2002, as released in Tor 0.0.0.]
37630 - Do not use unaligned memory access on alpha, mips, or mipsel.
37631 It *works*, but is very slow, so we treat them as if it doesn't.
37632 - Retry directory requests if we fail to get an answer we like
37633 from a given dirserver (we were retrying before, but only if
37634 we fail to connect).
37635 - When writing the RecommendedVersions line, sort them first.
37636 - When the client asked for a rendezvous port that the hidden
37637 service didn't want to provide, we were sending an IP address
37638 back along with the end cell. Fortunately, it was zero. But stop
37640 - Correct "your server is reachable" log entries to indicate that
37641 it was self-testing that told us so.
37644 Changes in version 0.1.1.6-alpha - 2005-09-09
37645 o Fixes on 0.1.1.5-alpha:
37646 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
37647 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
37648 - Fix bug with tor_memmem finding a match at the end of the string.
37649 - Make unit tests run without segfaulting.
37650 - Resolve some solaris x86 compile warnings.
37651 - Handle duplicate lines in approved-routers files without warning.
37652 - Fix bug where as soon as a server refused any requests due to his
37653 exit policy (e.g. when we ask for localhost and he tells us that's
37654 127.0.0.1 and he won't do it), we decided he wasn't obeying his
37655 exit policy using him for any exits.
37656 - Only do openssl hardware accelerator stuff if openssl version is
37659 o New controller features/fixes:
37660 - Add a "RESETCONF" command so you can set config options like
37661 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
37662 a config option in the torrc with no value, then it clears it
37663 entirely (rather than setting it to its default).
37664 - Add a "GETINFO config-file" to tell us where torrc is.
37665 - Avoid sending blank lines when GETINFO replies should be empty.
37666 - Add a QUIT command for the controller (for using it manually).
37667 - Fix a bug in SAVECONF that was adding default dirservers and
37668 other redundant entries to the torrc file.
37670 o Start on the new directory design:
37671 - Generate, publish, cache, serve new network-status format.
37672 - Publish individual descriptors (by fingerprint, by "all", and by
37674 - Publish client and server recommended versions separately.
37675 - Allow tor_gzip_uncompress() to handle multiple concatenated
37676 compressed strings. Serve compressed groups of router
37677 descriptors. The compression logic here could be more
37679 - Distinguish v1 authorities (all currently trusted directories)
37680 from v2 authorities (all trusted directories).
37681 - Change DirServers config line to note which dirs are v1 authorities.
37682 - Add configuration option "V1AuthoritativeDirectory 1" which
37683 moria1, moria2, and tor26 should set.
37684 - Remove option when getting directory cache to see whether they
37685 support running-routers; they all do now. Replace it with one
37686 to see whether caches support v2 stuff.
37689 - Dirservers now do their own external reachability testing of each
37690 Tor server, and only list them as running if they've been found to
37691 be reachable. We also send back warnings to the server's logs if
37692 it uploads a descriptor that we already believe is unreachable.
37693 - Implement exit enclaves: if we know an IP address for the
37694 destination, and there's a running Tor server at that address
37695 which allows exit to the destination, then extend the circuit to
37696 that exit first. This provides end-to-end encryption and end-to-end
37697 authentication. Also, if the user wants a .exit address or enclave,
37698 use 4 hops rather than 3, and cannibalize a general circ for it
37700 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
37701 controller. Also, rotate dns and cpu workers if the controller
37702 changes options that will affect them; and initialize the dns
37703 worker cache tree whether or not we start out as a server.
37704 - Only upload a new server descriptor when options change, 18
37705 hours have passed, uptime is reset, or bandwidth changes a lot.
37706 - Check [X-]Forwarded-For headers in HTTP requests when generating
37707 log messages. This lets people run dirservers (and caches) behind
37708 Apache but still know which IP addresses are causing warnings.
37710 o Config option changes:
37711 - Replace (Fascist)Firewall* config options with a new
37712 ReachableAddresses option that understands address policies.
37713 For example, "ReachableAddresses *:80,*:443"
37714 - Get rid of IgnoreVersion undocumented config option, and make us
37715 only warn, never exit, when we're running an obsolete version.
37716 - Make MonthlyAccountingStart config option truly obsolete now.
37718 o Fixes on 0.1.0.x:
37719 - Reject ports 465 and 587 in the default exit policy, since
37720 people have started using them for spam too.
37721 - It turns out we couldn't bootstrap a network since we added
37722 reachability detection in 0.1.0.1-rc. Good thing the Tor network
37723 has never gone down. Add an AssumeReachable config option to let
37724 servers and dirservers bootstrap. When we're trying to build a
37725 high-uptime or high-bandwidth circuit but there aren't enough
37726 suitable servers, try being less picky rather than simply failing.
37727 - Our logic to decide if the OR we connected to was the right guy
37728 was brittle and maybe open to a mitm for unverified routers.
37729 - We weren't cannibalizing circuits correctly for
37730 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
37731 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
37732 build those from scratch. This should make hidden services faster.
37733 - Predict required circuits better, with an eye toward making hidden
37734 services faster on the service end.
37735 - Retry streams if the exit node sends back a 'misc' failure. This
37736 should result in fewer random failures. Also, after failing
37737 from resolve failed or misc, reset the num failures, so we give
37738 it a fair shake next time we try.
37739 - Clean up the rendezvous warn log msgs, and downgrade some to info.
37740 - Reduce severity on logs about dns worker spawning and culling.
37741 - When we're shutting down and we do something like try to post a
37742 server descriptor or rendezvous descriptor, don't complain that
37743 we seem to be unreachable. Of course we are, we're shutting down.
37744 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
37745 We don't use them yet, but maybe one day our DNS resolver will be
37746 able to discover them.
37747 - Make ContactInfo mandatory for authoritative directory servers.
37748 - Require server descriptors to list IPv4 addresses -- hostnames
37749 are no longer allowed. This also fixes some potential security
37750 problems with people providing hostnames as their address and then
37751 preferentially resolving them to partition users.
37752 - Change log line for unreachability to explicitly suggest /etc/hosts
37753 as the culprit. Also make it clearer what IP address and ports we're
37754 testing for reachability.
37755 - Put quotes around user-supplied strings when logging so users are
37756 more likely to realize if they add bad characters (like quotes)
37758 - Let auth dir servers start without specifying an Address config
37760 - Make unit tests (and other invocations that aren't the real Tor)
37761 run without launching listeners, creating subdirectories, and so on.
37764 Changes in version 0.1.1.5-alpha - 2005-08-08
37765 o Bugfixes included in 0.1.0.14.
37767 o Bugfixes on 0.1.0.x:
37768 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
37769 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
37770 it would silently using ignore the 6668.
37773 Changes in version 0.1.0.14 - 2005-08-08
37774 o Bugfixes on 0.1.0.x:
37775 - Fix the other half of the bug with crypto handshakes
37777 - Fix an assert trigger if you send a 'signal term' via the
37778 controller when it's listening for 'event info' messages.
37781 Changes in version 0.1.1.4-alpha - 2005-08-04
37782 o Bugfixes included in 0.1.0.13.
37785 - Improve tor_gettimeofday() granularity on windows.
37786 - Make clients regenerate their keys when their IP address changes.
37787 - Implement some more GETINFO goodness: expose helper nodes, config
37788 options, getinfo keys.
37791 Changes in version 0.1.0.13 - 2005-08-04
37792 o Bugfixes on 0.1.0.x:
37793 - Fix a critical bug in the security of our crypto handshakes.
37794 - Fix a size_t underflow in smartlist_join_strings2() that made
37795 it do bad things when you hand it an empty smartlist.
37796 - Fix Windows installer to ship Tor license (thanks to Aphex for
37797 pointing out this oversight) and put a link to the doc directory
37799 - Explicitly set no-unaligned-access for sparc: it turns out the
37800 new gcc's let you compile broken code, but that doesn't make it
37804 Changes in version 0.1.1.3-alpha - 2005-07-23
37805 o Bugfixes on 0.1.1.2-alpha:
37806 - Fix a bug in handling the controller's "post descriptor"
37808 - Fix several bugs in handling the controller's "extend circuit"
37810 - Fix a bug in handling the controller's "stream status" event.
37811 - Fix an assert failure if we have a controller listening for
37812 circuit events and we go offline.
37813 - Re-allow hidden service descriptors to publish 0 intro points.
37814 - Fix a crash when generating your hidden service descriptor if
37815 you don't have enough intro points already.
37817 o New features on 0.1.1.2-alpha:
37818 - New controller function "getinfo accounting", to ask how
37819 many bytes we've used in this time period.
37820 - Experimental support for helper nodes: a lot of the risk from
37821 a small static adversary comes because users pick new random
37822 nodes every time they rebuild a circuit. Now users will try to
37823 stick to the same small set of entry nodes if they can. Not
37824 enabled by default yet.
37826 o Bugfixes on 0.1.0.12:
37827 - If you're an auth dir server, always publish your dirport,
37828 even if you haven't yet found yourself to be reachable.
37829 - Fix a size_t underflow in smartlist_join_strings2() that made
37830 it do bad things when you hand it an empty smartlist.
37833 Changes in version 0.1.0.12 - 2005-07-18
37834 o New directory servers:
37835 - tor26 has changed IP address.
37837 o Bugfixes on 0.1.0.x:
37838 - Fix a possible double-free in tor_gzip_uncompress().
37839 - When --disable-threads is set, do not search for or link against
37840 pthreads libraries.
37841 - Don't trigger an assert if an authoritative directory server
37842 claims its dirport is 0.
37843 - Fix bug with removing Tor as an NT service: some people were
37844 getting "The service did not return an error." Thanks to Matt
37848 Changes in version 0.1.1.2-alpha - 2005-07-15
37849 o New directory servers:
37850 - tor26 has changed IP address.
37852 o Bugfixes on 0.1.0.x, crashes/leaks:
37853 - Port the servers-not-obeying-their-exit-policies fix from
37855 - Fix an fd leak in start_daemon().
37856 - On Windows, you can't always reopen a port right after you've
37857 closed it. So change retry_listeners() to only close and re-open
37858 ports that have changed.
37859 - Fix a possible double-free in tor_gzip_uncompress().
37861 o Bugfixes on 0.1.0.x, usability:
37862 - When tor_socketpair() fails in Windows, give a reasonable
37863 Windows-style errno back.
37864 - Let people type "tor --install" as well as "tor -install" when
37866 want to make it an NT service.
37867 - NT service patch from Matt Edman to improve error messages.
37868 - When the controller asks for a config option with an abbreviated
37869 name, give the full name in our response.
37870 - Correct the man page entry on TrackHostExitsExpire.
37871 - Looks like we were never delivering deflated (i.e. compressed)
37872 running-routers lists, even when asked. Oops.
37873 - When --disable-threads is set, do not search for or link against
37874 pthreads libraries.
37876 o Bugfixes on 0.1.1.x:
37877 - Fix a seg fault with autodetecting which controller version is
37881 - New hidden service descriptor format: put a version in it, and
37882 let people specify introduction/rendezvous points that aren't
37883 in "the directory" (which is subjective anyway).
37884 - Allow the DEBUG controller event to work again. Mark certain log
37885 entries as "don't tell this to controllers", so we avoid cycles.
37888 Changes in version 0.1.0.11 - 2005-06-30
37889 o Bugfixes on 0.1.0.x:
37890 - Fix major security bug: servers were disregarding their
37891 exit policies if clients behaved unexpectedly.
37892 - Make OS X init script check for missing argument, so we don't
37893 confuse users who invoke it incorrectly.
37894 - Fix a seg fault in "tor --hash-password foo".
37895 - The MAPADDRESS control command was broken.
37898 Changes in version 0.1.1.1-alpha - 2005-06-29
37900 - Make OS X init script check for missing argument, so we don't
37901 confuse users who invoke it incorrectly.
37902 - Fix a seg fault in "tor --hash-password foo".
37903 - Fix a possible way to DoS dirservers.
37904 - When we complain that your exit policy implicitly allows local or
37905 private address spaces, name them explicitly so operators can
37907 - Make the log message less scary when all the dirservers are
37908 temporarily unreachable.
37909 - We were printing the number of idle dns workers incorrectly when
37913 - Revised controller protocol (version 1) that uses ascii rather
37914 than binary. Add supporting libraries in python and java so you
37915 can use the controller from your applications without caring how
37916 our protocol works.
37917 - Spiffy new support for crypto hardware accelerators. Can somebody
37921 Changes in version 0.0.9.10 - 2005-06-16
37922 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
37923 - Refuse relay cells that claim to have a length larger than the
37924 maximum allowed. This prevents a potential attack that could read
37925 arbitrary memory (e.g. keys) from an exit server's process
37929 Changes in version 0.1.0.10 - 2005-06-14
37930 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
37931 libevent before 1.1a.
37934 Changes in version 0.1.0.9-rc - 2005-06-09
37936 - Reset buf->highwater every time buf_shrink() is called, not just on
37937 a successful shrink. This was causing significant memory bloat.
37938 - Fix buffer overflow when checking hashed passwords.
37939 - Security fix: if seeding the RNG on Win32 fails, quit.
37940 - Allow seeding the RNG on Win32 even when you're not running as
37942 - Disable threading on Solaris too. Something is wonky with it,
37943 cpuworkers, and reentrant libs.
37944 - Reenable the part of the code that tries to flush as soon as an
37945 OR outbuf has a full TLS record available. Perhaps this will make
37946 OR outbufs not grow as huge except in rare cases, thus saving lots
37947 of CPU time plus memory.
37948 - Reject malformed .onion addresses rather then passing them on as
37949 normal web requests.
37950 - Adapt patch from Adam Langley: fix possible memory leak in
37951 tor_lookup_hostname().
37952 - Initialize libevent later in the startup process, so the logs are
37953 already established by the time we start logging libevent warns.
37954 - Use correct errno on win32 if libevent fails.
37955 - Check and warn about known-bad/slow libevent versions.
37956 - Pay more attention to the ClientOnly config option.
37957 - Have torctl.in/tor.sh.in check for location of su binary (needed
37959 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
37960 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
37961 HttpProxyAuthenticator
37962 - Stop warning about sigpipes in the logs. We're going to
37963 pretend that getting these occasionally is normal and fine.
37964 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
37966 installer screens; and don't put stuff into StartupItems unless
37967 the user asks you to.
37968 - Require servers that use the default dirservers to have public IP
37969 addresses. We have too many servers that are configured with private
37970 IPs and their admins never notice the log entries complaining that
37971 their descriptors are being rejected.
37972 - Add OSX uninstall instructions. An actual uninstall script will
37976 Changes in version 0.1.0.8-rc - 2005-05-23
37978 - It turns out that kqueue on OS X 10.3.9 was causing kernel
37979 panics. Disable kqueue on all OS X Tors.
37980 - Fix RPM: remove duplicate line accidentally added to the rpm
37982 - Disable threads on openbsd too, since its gethostaddr is not
37984 - Tolerate libevent 0.8 since it still works, even though it's
37986 - Enable building on Red Hat 9.0 again.
37987 - Allow the middle hop of the testing circuit to be running any
37988 version, now that most of them have the bugfix to let them connect
37989 to unknown servers. This will allow reachability testing to work
37990 even when 0.0.9.7-0.0.9.9 become obsolete.
37991 - Handle relay cells with rh.length too large. This prevents
37992 a potential attack that could read arbitrary memory (maybe even
37993 keys) from the exit server's process.
37994 - We screwed up the dirport reachability testing when we don't yet
37995 have a cached version of the directory. Hopefully now fixed.
37996 - Clean up router_load_single_router() (used by the controller),
37997 so it doesn't seg fault on error.
37998 - Fix a minor memory leak when somebody establishes an introduction
37999 point at your Tor server.
38000 - If a socks connection ends because read fails, don't warn that
38001 you're not sending a socks reply back.
38004 - Add HttpProxyAuthenticator config option too, that works like
38005 the HttpsProxyAuthenticator config option.
38006 - Encode hashed controller passwords in hex instead of base64,
38007 to make it easier to write controllers.
38010 Changes in version 0.1.0.7-rc - 2005-05-17
38012 - Fix a bug in the OS X package installer that prevented it from
38013 installing on Tiger.
38014 - Fix a script bug in the OS X package installer that made it
38015 complain during installation.
38016 - Find libevent even if it's hiding in /usr/local/ and your
38017 CFLAGS and LDFLAGS don't tell you to look there.
38018 - Be able to link with libevent as a shared library (the default
38019 after 1.0d), even if it's hiding in /usr/local/lib and even
38020 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
38021 assuming you're running gcc. Otherwise fail and give a useful
38023 - Fix a bug in the RPM packager: set home directory for _tor to
38024 something more reasonable when first installing.
38025 - Free a minor amount of memory that is still reachable on exit.
38028 Changes in version 0.1.0.6-rc - 2005-05-14
38030 - Implement --disable-threads configure option. Disable threads on
38031 netbsd by default, because it appears to have no reentrant resolver
38033 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
38034 release (1.1) detects and disables kqueue if it's broken.
38035 - Append default exit policy before checking for implicit internal
38036 addresses. Now we don't log a bunch of complaints on startup
38037 when using the default exit policy.
38038 - Some people were putting "Address " in their torrc, and they had
38039 a buggy resolver that resolved " " to 0.0.0.0. Oops.
38040 - If DataDir is ~/.tor, and that expands to /.tor, then default to
38041 LOCALSTATEDIR/tor instead.
38042 - Fix fragmented-message bug in TorControl.py.
38043 - Resolve a minor bug which would prevent unreachable dirports
38044 from getting suppressed in the published descriptor.
38045 - When the controller gave us a new descriptor, we weren't resolving
38046 it immediately, so Tor would think its address was 0.0.0.0 until
38047 we fetched a new directory.
38048 - Fix an uppercase/lowercase case error in suppressing a bogus
38049 libevent warning on some Linuxes.
38052 - Begin scrubbing sensitive strings from logs by default. Turn off
38053 the config option SafeLogging if you need to do debugging.
38054 - Switch to a new buffer management algorithm, which tries to avoid
38055 reallocing and copying quite as much. In first tests it looks like
38056 it uses *more* memory on average, but less cpu.
38057 - First cut at support for "create-fast" cells. Clients can use
38058 these when extending to their first hop, since the TLS already
38059 provides forward secrecy and authentication. Not enabled on
38061 - When dirservers refuse a router descriptor, we now log its
38062 contactinfo, platform, and the poster's IP address.
38063 - Call tor_free_all instead of connections_free_all after forking, to
38064 save memory on systems that need to fork.
38065 - Whine at you if you're a server and you don't set your contactinfo.
38066 - Implement --verify-config command-line option to check if your torrc
38067 is valid without actually launching Tor.
38068 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
38069 rather than just rejecting it.
38072 Changes in version 0.1.0.5-rc - 2005-04-27
38074 - Stop trying to print a null pointer if an OR conn fails because
38075 we didn't like its cert.
38077 - Switch our internal buffers implementation to use a ring buffer,
38078 to hopefully improve performance for fast servers a lot.
38079 - Add HttpsProxyAuthenticator support (basic auth only), based
38080 on patch from Adam Langley.
38081 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
38082 the fast servers that have been joining lately.
38083 - Give hidden service accesses extra time on the first attempt,
38084 since 60 seconds is often only barely enough. This might improve
38086 - Improve performance for dirservers: stop re-parsing the whole
38087 directory every time you regenerate it.
38088 - Add more debugging info to help us find the weird dns freebsd
38089 pthreads bug; cleaner debug messages to help track future issues.
38092 Changes in version 0.0.9.9 - 2005-04-23
38093 o Bugfixes on 0.0.9.x:
38094 - If unofficial Tor clients connect and send weird TLS certs, our
38095 Tor server triggers an assert. This release contains a minimal
38096 backport from the broader fix that we put into 0.1.0.4-rc.
38099 Changes in version 0.1.0.4-rc - 2005-04-23
38101 - If unofficial Tor clients connect and send weird TLS certs, our
38102 Tor server triggers an assert. Stop asserting, and start handling
38103 TLS errors better in other situations too.
38104 - When the controller asks us to tell it about all the debug-level
38105 logs, it turns out we were generating debug-level logs while
38106 telling it about them, which turns into a bad loop. Now keep
38107 track of whether you're sending a debug log to the controller,
38108 and don't log when you are.
38109 - Fix the "postdescriptor" feature of the controller interface: on
38110 non-complete success, only say "done" once.
38112 - Clients are now willing to load balance over up to 2mB, not 1mB,
38113 of advertised bandwidth capacity.
38114 - Add a NoPublish config option, so you can be a server (e.g. for
38115 testing running Tor servers in other Tor networks) without
38116 publishing your descriptor to the primary dirservers.
38119 Changes in version 0.1.0.3-rc - 2005-04-08
38120 o Improvements on 0.1.0.2-rc:
38121 - Client now retries when streams end early for 'hibernating' or
38122 'resource limit' reasons, rather than failing them.
38123 - More automated handling for dirserver operators:
38124 - Automatically approve nodes running 0.1.0.2-rc or later,
38125 now that the the reachability detection stuff is working.
38126 - Now we allow two unverified servers with the same nickname
38127 but different keys. But if a nickname is verified, only that
38128 nickname+key are allowed.
38129 - If you're an authdirserver connecting to an address:port,
38130 and it's not the OR you were expecting, forget about that
38131 descriptor. If he *was* the one you were expecting, then forget
38132 about all other descriptors for that address:port.
38133 - Allow servers to publish descriptors from 12 hours in the future.
38134 Corollary: only whine about clock skew from the dirserver if
38135 he's a trusted dirserver (since now even verified servers could
38136 have quite wrong clocks).
38137 - Adjust maximum skew and age for rendezvous descriptors: let skew
38138 be 48 hours rather than 90 minutes.
38139 - Efficiency improvements:
38140 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
38141 it much faster to look up a circuit for each relay cell.
38142 - Remove most calls to assert_all_pending_dns_resolves_ok(),
38143 since they're eating our cpu on exit nodes.
38144 - Stop wasting time doing a case insensitive comparison for every
38145 dns name every time we do any lookup. Canonicalize the names to
38146 lowercase and be done with it.
38147 - Start sending 'truncated' cells back rather than destroy cells,
38148 if the circuit closes in front of you. This means we won't have
38149 to abandon partially built circuits.
38150 - Only warn once per nickname from add_nickname_list_to_smartlist
38151 per failure, so an entrynode or exitnode choice that's down won't
38153 - Put a note in the torrc about abuse potential with the default
38155 - Revise control spec and implementation to allow all log messages to
38156 be sent to controller with their severities intact (suggested by
38157 Matt Edman). Update TorControl to handle new log event types.
38158 - Provide better explanation messages when controller's POSTDESCRIPTOR
38160 - Stop putting nodename in the Platform string in server descriptors.
38161 It doesn't actually help, and it is confusing/upsetting some people.
38163 o Bugfixes on 0.1.0.2-rc:
38164 - We were printing the host mask wrong in exit policies in server
38165 descriptors. This isn't a critical bug though, since we were still
38166 obeying the exit policy internally.
38167 - Fix Tor when compiled with libevent but without pthreads: move
38168 connection_unregister() from _connection_free() to
38170 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
38171 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
38172 when we look through the connection array, we'll find any of the
38173 cpu/dnsworkers. This is no good.
38175 o Bugfixes on 0.0.9.8:
38176 - Fix possible bug on threading platforms (e.g. win32) which was
38177 leaking a file descriptor whenever a cpuworker or dnsworker died.
38178 - When using preferred entry or exit nodes, ignore whether the
38179 circuit wants uptime or capacity. They asked for the nodes, they
38181 - chdir() to your datadirectory at the *end* of the daemonize process,
38182 not the beginning. This was a problem because the first time you
38183 run tor, if your datadir isn't there, and you have runasdaemon set
38184 to 1, it will try to chdir to it before it tries to create it. Oops.
38185 - Handle changed router status correctly when dirserver reloads
38186 fingerprint file. We used to be dropping all unverified descriptors
38187 right then. The bug was hidden because we would immediately
38188 fetch a directory from another dirserver, which would include the
38189 descriptors we just dropped.
38190 - When we're connecting to an OR and he's got a different nickname/key
38191 than we were expecting, only complain loudly if we're an OP or a
38192 dirserver. Complaining loudly to the OR admins just confuses them.
38193 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
38194 artificially capped at 500kB.
38197 Changes in version 0.0.9.8 - 2005-04-07
38198 o Bugfixes on 0.0.9.x:
38199 - We have a bug that I haven't found yet. Sometimes, very rarely,
38200 cpuworkers get stuck in the 'busy' state, even though the cpuworker
38201 thinks of itself as idle. This meant that no new circuits ever got
38202 established. Here's a workaround to kill any cpuworker that's been
38203 busy for more than 100 seconds.
38206 Changes in version 0.1.0.2-rc - 2005-04-01
38207 o Bugfixes on 0.1.0.1-rc:
38208 - Fixes on reachability detection:
38209 - Don't check for reachability while hibernating.
38210 - If ORPort is reachable but DirPort isn't, still publish the
38211 descriptor, but zero out DirPort until it's found reachable.
38212 - When building testing circs for ORPort testing, use only
38213 high-bandwidth nodes, so fewer circuits fail.
38214 - Complain about unreachable ORPort separately from unreachable
38215 DirPort, so the user knows what's going on.
38216 - Make sure we only conclude ORPort reachability if we didn't
38217 initiate the conn. Otherwise we could falsely conclude that
38218 we're reachable just because we connected to the guy earlier
38219 and he used that same pipe to extend to us.
38220 - Authdirservers shouldn't do ORPort reachability detection,
38221 since they're in clique mode, so it will be rare to find a
38222 server not already connected to them.
38223 - When building testing circuits, always pick middle hops running
38224 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
38225 bug. (This is a kludge; it will go away when 0.0.9.x becomes
38227 - When we decide we're reachable, actually publish our descriptor
38229 - Fix bug in redirectstream in the controller.
38230 - Fix the state descriptor strings so logs don't claim edge streams
38231 are in a different state than they actually are.
38232 - Use recent libevent features when possible (this only really affects
38233 win32 and osx right now, because the new libevent with these
38234 features hasn't been released yet). Add code to suppress spurious
38236 - Prevent possible segfault in connection_close_unattached_ap().
38237 - Fix newlines on torrc in win32.
38238 - Improve error msgs when tor-resolve fails.
38240 o Improvements on 0.0.9.x:
38241 - New experimental script tor/contrib/ExerciseServer.py (needs more
38242 work) that uses the controller interface to build circuits and
38243 fetch pages over them. This will help us bootstrap servers that
38244 have lots of capacity but haven't noticed it yet.
38245 - New experimental script tor/contrib/PathDemo.py (needs more work)
38246 that uses the controller interface to let you choose whole paths
38248 "<hostname>.<path,separated by dots>.<length of path>.path"
38249 - When we've connected to an OR and handshaked but didn't like
38250 the result, we were closing the conn without sending destroy
38251 cells back for pending circuits. Now send those destroys.
38254 Changes in version 0.0.9.7 - 2005-04-01
38255 o Bugfixes on 0.0.9.x:
38256 - Fix another race crash bug (thanks to Glenn Fink for reporting).
38257 - Compare identity to identity, not to nickname, when extending to
38258 a router not already in the directory. This was preventing us from
38259 extending to unknown routers. Oops.
38260 - Make sure to create OS X Tor user in <500 range, so we aren't
38261 creating actual system users.
38262 - Note where connection-that-hasn't-sent-end was marked, and fix
38263 a few really loud instances of this harmless bug (it's fixed more
38267 Changes in version 0.1.0.1-rc - 2005-03-28
38269 - Add reachability testing. Your Tor server will automatically try
38270 to see if its ORPort and DirPort are reachable from the outside,
38271 and it won't upload its descriptor until it decides they are.
38272 - Handle unavailable hidden services better. Handle slow or busy
38273 hidden services better.
38274 - Add support for CONNECTing through https proxies, with "HttpsProxy"
38276 - New exit policy: accept most low-numbered ports, rather than
38277 rejecting most low-numbered ports.
38278 - More Tor controller support (still experimental). See
38279 http://tor.eff.org/doc/control-spec.txt for all the new features,
38280 including signals to emulate unix signals from any platform;
38281 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
38282 closestream; closecircuit; etc.
38283 - Make nt services work and start on startup on win32 (based on
38284 patch by Matt Edman).
38285 - Add a new AddressMap config directive to rewrite incoming socks
38286 addresses. This lets you, for example, declare an implicit
38287 required exit node for certain sites.
38288 - Add a new TrackHostExits config directive to trigger addressmaps
38289 for certain incoming socks addresses -- for sites that break when
38290 your exit keeps changing (based on patch by Mike Perry).
38291 - Redo the client-side dns cache so it's just an addressmap too.
38292 - Notice when our IP changes, and reset stats/uptime/reachability.
38293 - When an application is using socks5, give him the whole variety of
38294 potential socks5 responses (connect refused, host unreachable, etc),
38295 rather than just "success" or "failure".
38296 - A more sane version numbering system. See
38297 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
38298 - New contributed script "exitlist": a simple python script to
38299 parse directories and find Tor nodes that exit to listed
38301 - New contributed script "privoxy-tor-toggle" to toggle whether
38302 Privoxy uses Tor. Seems to be configured for Debian by default.
38303 - Report HTTP reasons to client when getting a response from directory
38304 servers -- so you can actually know what went wrong.
38305 - New config option MaxAdvertisedBandwidth which lets you advertise
38306 a low bandwidthrate (to not attract as many circuits) while still
38307 allowing a higher bandwidthrate in reality.
38309 o Robustness/stability fixes:
38310 - Make Tor use Niels Provos's libevent instead of its current
38311 poll-but-sometimes-select mess. This will let us use faster async
38312 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
38314 - pthread support now too. This was forced because when we forked,
38315 we ended up wasting a lot of duplicate ram over time. Also switch
38316 to foo_r versions of some library calls to allow reentry and
38318 - Better handling for heterogeneous / unreliable nodes:
38319 - Annotate circuits w/ whether they aim to contain high uptime nodes
38320 and/or high capacity nodes. When building circuits, choose
38322 - This means that every single node in an intro rend circuit,
38323 not just the last one, will have a minimum uptime.
38324 - New config option LongLivedPorts to indicate application streams
38325 that will want high uptime circuits.
38326 - Servers reset uptime when a dir fetch entirely fails. This
38327 hopefully reflects stability of the server's network connectivity.
38328 - If somebody starts his tor server in Jan 2004 and then fixes his
38329 clock, don't make his published uptime be a year.
38330 - Reset published uptime when you wake up from hibernation.
38331 - Introduce a notion of 'internal' circs, which are chosen without
38332 regard to the exit policy of the last hop. Intro and rendezvous
38333 circs must be internal circs, to avoid leaking information. Resolve
38334 and connect streams can use internal circs if they want.
38335 - New circuit pooling algorithm: make sure to have enough circs around
38336 to satisfy any predicted ports, and also make sure to have 2 internal
38337 circs around if we've required internal circs lately (and with high
38338 uptime if we've seen that lately too).
38339 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
38340 which describes how often we retry making new circuits if current
38341 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
38342 how long we're willing to make use of an already-dirty circuit.
38343 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
38344 circ as necessary, if there are any completed ones lying around
38345 when we try to launch one.
38346 - Make hidden services try to establish a rendezvous for 30 seconds,
38347 rather than for n (where n=3) attempts to build a circuit.
38348 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
38349 "ShutdownWaitLength".
38350 - Try to be more zealous about calling connection_edge_end when
38351 things go bad with edge conns in connection.c.
38352 - Revise tor-spec to add more/better stream end reasons.
38353 - Revise all calls to connection_edge_end to avoid sending "misc",
38354 and to take errno into account where possible.
38357 - Fix a race condition that can trigger an assert, when we have a
38358 pending create cell and an OR connection fails right then.
38359 - Fix several double-mark-for-close bugs, e.g. where we were finding
38360 a conn for a cell even if that conn is already marked for close.
38361 - Make sequence of log messages when starting on win32 with no config
38362 file more reasonable.
38363 - When choosing an exit node for a new non-internal circ, don't take
38364 into account whether it'll be useful for any pending x.onion
38365 addresses -- it won't.
38366 - Turn addr_policy_compare from a tristate to a quadstate; this should
38367 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
38368 for google.com" problem.
38369 - Make "platform" string in descriptor more accurate for Win32 servers,
38370 so it's not just "unknown platform".
38371 - Fix an edge case in parsing config options (thanks weasel).
38372 If they say "--" on the commandline, it's not an option.
38373 - Reject odd-looking addresses at the client (e.g. addresses that
38374 contain a colon), rather than having the server drop them because
38376 - tor-resolve requests were ignoring .exit if there was a working circuit
38377 they could use instead.
38378 - REUSEADDR on normal platforms means you can rebind to the port
38379 right after somebody else has let it go. But REUSEADDR on win32
38380 means to let you bind to the port _even when somebody else
38381 already has it bound_! So, don't do that on Win32.
38382 - Change version parsing logic: a version is "obsolete" if it is not
38383 recommended and (1) there is a newer recommended version in the
38384 same series, or (2) there are no recommended versions in the same
38385 series, but there are some recommended versions in a newer series.
38386 A version is "new" if it is newer than any recommended version in
38388 - Stop most cases of hanging up on a socks connection without sending
38392 - Require BandwidthRate to be at least 20kB/s for servers.
38393 - When a dirserver causes you to give a warn, mention which dirserver
38395 - New config option DirAllowPrivateAddresses for authdirservers.
38396 Now by default they refuse router descriptors that have non-IP or
38397 private-IP addresses.
38398 - Stop publishing socksport in the directory, since it's not
38399 actually meant to be public. For compatibility, publish a 0 there
38401 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
38402 smart" value, that is low for servers and high for clients.
38403 - If our clock jumps forward by 100 seconds or more, assume something
38404 has gone wrong with our network and abandon all not-yet-used circs.
38405 - Warn when exit policy implicitly allows local addresses.
38406 - If we get an incredibly skewed timestamp from a dirserver mirror
38407 that isn't a verified OR, don't warn -- it's probably him that's
38409 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
38410 cookies to disk and doesn't log each web request to disk. (Thanks
38411 to Brett Carrington for pointing this out.)
38412 - When a client asks us for a dir mirror and we don't have one,
38413 launch an attempt to get a fresh one.
38414 - If we're hibernating and we get a SIGINT, exit immediately.
38415 - Add --with-dmalloc ./configure option, to track memory leaks.
38416 - And try to free all memory on closing, so we can detect what
38418 - Cache local dns resolves correctly even when they're .exit
38420 - Give a better warning when some other server advertises an
38421 ORPort that is actually an apache running ssl.
38422 - Add "opt hibernating 1" to server descriptor to make it clearer
38423 whether the server is hibernating.
38426 Changes in version 0.0.9.6 - 2005-03-24
38427 o Bugfixes on 0.0.9.x (crashes and asserts):
38428 - Add new end stream reasons to maintenance branch. Fix bug where
38429 reason (8) could trigger an assert. Prevent bug from recurring.
38430 - Apparently win32 stat wants paths to not end with a slash.
38431 - Fix assert triggers in assert_cpath_layer_ok(), where we were
38432 blowing away the circuit that conn->cpath_layer points to, then
38433 checking to see if the circ is well-formed. Backport check to make
38434 sure we dont use the cpath on a closed connection.
38435 - Prevent circuit_resume_edge_reading_helper() from trying to package
38436 inbufs for marked-for-close streams.
38437 - Don't crash on hup if your options->address has become unresolvable.
38438 - Some systems (like OS X) sometimes accept() a connection and tell
38439 you the remote host is 0.0.0.0:0. If this happens, due to some
38440 other mis-features, we get confused; so refuse the conn for now.
38442 o Bugfixes on 0.0.9.x (other):
38443 - Fix harmless but scary "Unrecognized content encoding" warn message.
38444 - Add new stream error reason: TORPROTOCOL reason means "you are not
38445 speaking a version of Tor I understand; say bye-bye to your stream."
38446 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
38447 into the future, now that we are more tolerant of skew. This
38448 resolves a bug where a Tor server would refuse to cache a directory
38449 because all the directories it gets are too far in the future;
38450 yet the Tor server never logs any complaints about clock skew.
38451 - Mac packaging magic: make man pages useable, and do not overwrite
38452 existing torrc files.
38453 - Make OS X log happily to /var/log/tor/tor.log
38456 Changes in version 0.0.9.5 - 2005-02-22
38457 o Bugfixes on 0.0.9.x:
38458 - Fix an assert race at exit nodes when resolve requests fail.
38459 - Stop picking unverified dir mirrors--it only leads to misery.
38460 - Patch from Matt Edman to make NT services work better. Service
38461 support is still not compiled into the executable by default.
38462 - Patch from Dmitri Bely so the Tor service runs better under
38463 the win32 SYSTEM account.
38464 - Make tor-resolve actually work (?) on Win32.
38465 - Fix a sign bug when getrlimit claims to have 4+ billion
38466 file descriptors available.
38467 - Stop refusing to start when bandwidthburst == bandwidthrate.
38468 - When create cells have been on the onion queue more than five
38469 seconds, just send back a destroy and take them off the list.
38472 Changes in version 0.0.9.4 - 2005-02-03
38473 o Bugfixes on 0.0.9:
38474 - Fix an assert bug that took down most of our servers: when
38475 a server claims to have 1 GB of bandwidthburst, don't
38477 - Don't crash as badly if we have spawned the max allowed number
38478 of dnsworkers, or we're out of file descriptors.
38479 - Block more file-sharing ports in the default exit policy.
38480 - MaxConn is now automatically set to the hard limit of max
38481 file descriptors we're allowed (ulimit -n), minus a few for
38483 - Give a clearer message when servers need to raise their
38484 ulimit -n when they start running out of file descriptors.
38485 - SGI Compatibility patches from Jan Schaumann.
38486 - Tolerate a corrupt cached directory better.
38487 - When a dirserver hasn't approved your server, list which one.
38488 - Go into soft hibernation after 95% of the bandwidth is used,
38489 not 99%. This is especially important for daily hibernators who
38490 have a small accounting max. Hopefully it will result in fewer
38491 cut connections when the hard hibernation starts.
38492 - Load-balance better when using servers that claim more than
38493 800kB/s of capacity.
38494 - Make NT services work (experimental, only used if compiled in).
38497 Changes in version 0.0.9.3 - 2005-01-21
38498 o Bugfixes on 0.0.9:
38499 - Backport the cpu use fixes from main branch, so busy servers won't
38500 need as much processor time.
38501 - Work better when we go offline and then come back, or when we
38502 run Tor at boot before the network is up. We do this by
38503 optimistically trying to fetch a new directory whenever an
38504 application request comes in and we think we're offline -- the
38505 human is hopefully a good measure of when the network is back.
38506 - Backport some minimal hidserv bugfixes: keep rend circuits open as
38507 long as you keep using them; actually publish hidserv descriptors
38508 shortly after they change, rather than waiting 20-40 minutes.
38509 - Enable Mac startup script by default.
38510 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
38511 - When you update AllowUnverifiedNodes or FirewallPorts via the
38512 controller's setconf feature, we were always appending, never
38514 - When you update HiddenServiceDir via setconf, it was screwing up
38515 the order of reading the lines, making it fail.
38516 - Do not rewrite a cached directory back to the cache; otherwise we
38517 will think it is recent and not fetch a newer one on startup.
38518 - Workaround for webservers that lie about Content-Encoding: Tor
38519 now tries to autodetect compressed directories and compression
38520 itself. This lets us Proxypass dir fetches through apache.
38523 Changes in version 0.0.9.2 - 2005-01-04
38524 o Bugfixes on 0.0.9 (crashes and asserts):
38525 - Fix an assert on startup when the disk is full and you're logging
38527 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
38528 style address, then we'd crash.
38529 - Fix an assert trigger when the running-routers string we get from
38530 a dirserver is broken.
38531 - Make worker threads start and run on win32. Now win32 servers
38533 - Bandaid (not actually fix, but now it doesn't crash) an assert
38534 where the dns worker dies mysteriously and the main Tor process
38535 doesn't remember anything about the address it was resolving.
38537 o Bugfixes on 0.0.9 (Win32):
38538 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
38539 name out of the warning/assert messages.
38540 - Fix a superficial "unhandled error on read" bug on win32.
38541 - The win32 installer no longer requires a click-through for our
38542 license, since our Free Software license grants rights but does not
38544 - Win32: When connecting to a dirserver fails, try another one
38545 immediately. (This was already working for non-win32 Tors.)
38546 - Stop trying to parse $HOME on win32 when hunting for default
38548 - Make tor-resolve.c work on win32 by calling network_init().
38550 o Bugfixes on 0.0.9 (other):
38551 - Make 0.0.9.x build on Solaris again.
38552 - Due to a fencepost error, we were blowing away the \n when reporting
38553 confvalue items in the controller. So asking for multiple config
38554 values at once couldn't work.
38555 - When listing circuits that are pending on an opening OR connection,
38556 if we're an OR we were listing circuits that *end* at us as
38557 being pending on every listener, dns/cpu worker, etc. Stop that.
38558 - Dirservers were failing to create 'running-routers' or 'directory'
38559 strings if we had more than some threshold of routers. Fix them so
38560 they can handle any number of routers.
38561 - Fix a superficial "Duplicate mark for close" bug.
38562 - Stop checking for clock skew for OR connections, even for servers.
38563 - Fix a fencepost error that was chopping off the last letter of any
38564 nickname that is the maximum allowed nickname length.
38565 - Update URLs in log messages so they point to the new website.
38566 - Fix a potential problem in mangling server private keys while
38567 writing to disk (not triggered yet, as far as we know).
38568 - Include the licenses for other free software we include in Tor,
38569 now that we're shipping binary distributions more regularly.
38572 Changes in version 0.0.9.1 - 2004-12-15
38573 o Bugfixes on 0.0.9:
38574 - Make hibernation actually work.
38575 - Make HashedControlPassword config option work.
38576 - When we're reporting event circuit status to a controller,
38577 don't use the stream status code.
38580 Changes in version 0.0.9 - 2004-12-12
38582 - Clean up manpage and torrc.sample file.
38583 - Clean up severities and text of log warnings.
38585 - Make servers trigger an assert when they enter hibernation.
38588 Changes in version 0.0.9rc7 - 2004-12-08
38589 o Bugfixes on 0.0.9rc:
38590 - Fix a stack-trashing crash when an exit node begins hibernating.
38591 - Avoid looking at unallocated memory while considering which
38592 ports we need to build circuits to cover.
38593 - Stop a sigpipe: when an 'end' cell races with eof from the app,
38594 we shouldn't hold-open-until-flush if the eof arrived first.
38595 - Fix a bug with init_cookie_authentication() in the controller.
38596 - When recommending new-format log lines, if the upper bound is
38597 LOG_ERR, leave it implicit.
38599 o Bugfixes on 0.0.8.1:
38600 - Fix a whole slew of memory leaks.
38601 - Fix isspace() and friends so they still make Solaris happy
38602 but also so they don't trigger asserts on win32.
38603 - Fix parse_iso_time on platforms without strptime (eg win32).
38604 - win32: tolerate extra "readable" events better.
38605 - win32: when being multithreaded, leave parent fdarray open.
38606 - Make unit tests work on win32.
38609 Changes in version 0.0.9rc6 - 2004-12-06
38610 o Bugfixes on 0.0.9pre:
38611 - Clean up some more integer underflow opportunities (not exploitable
38613 - While hibernating, hup should not regrow our listeners.
38614 - Send an end to the streams we close when we hibernate, rather
38615 than just chopping them off.
38616 - React to eof immediately on non-open edge connections.
38618 o Bugfixes on 0.0.8.1:
38619 - Calculate timeout for waiting for a connected cell from the time
38620 we sent the begin cell, not from the time the stream started. If
38621 it took a long time to establish the circuit, we would time out
38622 right after sending the begin cell.
38623 - Fix router_compare_addr_to_addr_policy: it was not treating a port
38624 of * as always matching, so we were picking reject *:* nodes as
38625 exit nodes too. Oops.
38628 - New circuit building strategy: keep a list of ports that we've
38629 used in the past 6 hours, and always try to have 2 circuits open
38630 or on the way that will handle each such port. Seed us with port
38631 80 so web users won't complain that Tor is "slow to start up".
38632 - Make kill -USR1 dump more useful stats about circuits.
38633 - When warning about retrying or giving up, print the address, so
38634 the user knows which one it's talking about.
38635 - If you haven't used a clean circuit in an hour, throw it away,
38636 just to be on the safe side. (This means after 6 hours a totally
38637 unused Tor client will have no circuits open.)
38640 Changes in version 0.0.9rc5 - 2004-12-01
38641 o Bugfixes on 0.0.8.1:
38642 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
38643 - Let resolve conns retry/expire also, rather than sticking around
38645 - If we are using select, make sure we stay within FD_SETSIZE.
38647 o Bugfixes on 0.0.9pre:
38648 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
38649 but doesn't seem to be currently; thanks to Ilja van Sprundel for
38651 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
38652 instead. Impose minima and maxima for all *Period options; impose
38653 even tighter maxima for fetching if we are a caching dirserver.
38654 Clip rather than rejecting.
38655 - Fetch cached running-routers from servers that serve it (that is,
38656 authdirservers and servers running 0.0.9rc5-cvs or later.)
38659 - Accept *:706 (silc) in default exit policy.
38660 - Implement new versioning format for post 0.1.
38661 - Support "foo.nickname.exit" addresses, to let Alice request the
38662 address "foo" as viewed by exit node "nickname". Based on a patch
38664 - Make tor --version --version dump the cvs Id of every file.
38667 Changes in version 0.0.9rc4 - 2004-11-28
38668 o Bugfixes on 0.0.8.1:
38669 - Make windows sockets actually non-blocking (oops), and handle
38670 win32 socket errors better.
38672 o Bugfixes on 0.0.9rc1:
38673 - Actually catch the -USR2 signal.
38676 Changes in version 0.0.9rc3 - 2004-11-25
38677 o Bugfixes on 0.0.8.1:
38678 - Flush the log file descriptor after we print "Tor opening log file",
38679 so we don't see those messages days later.
38681 o Bugfixes on 0.0.9rc1:
38682 - Make tor-resolve work again.
38683 - Avoid infinite loop in tor-resolve if tor hangs up on it.
38684 - Fix an assert trigger for clients/servers handling resolves.
38687 Changes in version 0.0.9rc2 - 2004-11-24
38688 o Bugfixes on 0.0.9rc1:
38689 - I broke socks5 support while fixing the eof bug.
38690 - Allow unitless bandwidths and intervals; they default to bytes
38692 - New servers don't start out hibernating; they are active until
38693 they run out of bytes, so they have a better estimate of how
38694 long it takes, and so their operators can know they're working.
38697 Changes in version 0.0.9rc1 - 2004-11-23
38698 o Bugfixes on 0.0.8.1:
38699 - Finally fix a bug that's been plaguing us for a year:
38700 With high load, circuit package window was reaching 0. Whenever
38701 we got a circuit-level sendme, we were reading a lot on each
38702 socket, but only writing out a bit. So we would eventually reach
38703 eof. This would be noticed and acted on even when there were still
38704 bytes sitting in the inbuf.
38705 - When poll() is interrupted, we shouldn't believe the revents values.
38707 o Bugfixes on 0.0.9pre6:
38708 - Fix hibernate bug that caused pre6 to be broken.
38709 - Don't keep rephist info for routers that haven't had activity for
38710 24 hours. (This matters now that clients have keys, since we track
38712 - Never call close_temp_logs while validating log options.
38713 - Fix backslash-escaping on tor.sh.in and torctl.in.
38716 - Implement weekly/monthly/daily accounting: now you specify your
38717 hibernation properties by
38718 AccountingMax N bytes|KB|MB|GB|TB
38719 AccountingStart day|week|month [day] HH:MM
38720 Defaults to "month 1 0:00".
38721 - Let bandwidth and interval config options be specified as 5 bytes,
38722 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
38723 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
38724 get back to normal.)
38725 - If your requested entry or exit node has advertised bandwidth 0,
38727 - Be more greedy about filling up relay cells -- we try reading again
38728 once we've processed the stuff we read, in case enough has arrived
38729 to fill the last cell completely.
38730 - Apply NT service patch from Osamu Fujino. Still needs more work.
38733 Changes in version 0.0.9pre6 - 2004-11-15
38734 o Bugfixes on 0.0.8.1:
38735 - Fix assert failure on malformed socks4a requests.
38736 - Use identity comparison, not nickname comparison, to choose which
38737 half of circuit-ID-space each side gets to use. This is needed
38738 because sometimes we think of a router as a nickname, and sometimes
38739 as a hex ID, and we can't predict what the other side will do.
38740 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
38741 write() call will fail and we handle it there.
38742 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
38743 and smartlist_len, which are two major profiling offenders.
38745 o Bugfixes on 0.0.9pre5:
38746 - Fix a bug in read_all that was corrupting config files on windows.
38747 - When we're raising the max number of open file descriptors to
38748 'unlimited', don't log that we just raised it to '-1'.
38749 - Include event code with events, as required by control-spec.txt.
38750 - Don't give a fingerprint when clients do --list-fingerprint:
38751 it's misleading, because it will never be the same again.
38752 - Stop using strlcpy in tor_strndup, since it was slowing us
38754 - Remove warn on startup about missing cached-directory file.
38755 - Make kill -USR1 work again.
38756 - Hibernate if we start tor during the "wait for wakeup-time" phase
38757 of an accounting interval. Log our hibernation plans better.
38758 - Authoritative dirservers now also cache their directory, so they
38759 have it on start-up.
38762 - Fetch running-routers; cache running-routers; compress
38763 running-routers; serve compressed running-routers.z
38764 - Add NSI installer script contributed by J Doe.
38765 - Commit VC6 and VC7 workspace/project files.
38766 - Commit a tor.spec for making RPM files, with help from jbash.
38767 - Add contrib/torctl.in contributed by Glenn Fink.
38768 - Implement the control-spec's SAVECONF command, to write your
38769 configuration to torrc.
38770 - Get cookie authentication for the controller closer to working.
38771 - Include control-spec.txt in the tarball.
38772 - When set_conf changes our server descriptor, upload a new copy.
38773 But don't upload it too often if there are frequent changes.
38774 - Document authentication config in man page, and document signals
38776 - Clean up confusing parts of man page and torrc.sample.
38777 - Make expand_filename handle ~ and ~username.
38778 - Use autoconf to enable largefile support where necessary. Use
38779 ftello where available, since ftell can fail at 2GB.
38780 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
38781 log more informatively.
38782 - Give a slightly more useful output for "tor -h".
38783 - Refuse application socks connections to port 0.
38784 - Check clock skew for verified servers, but allow unverified
38785 servers and clients to have any clock skew.
38786 - Break DirFetchPostPeriod into:
38787 - DirFetchPeriod for fetching full directory,
38788 - StatusFetchPeriod for fetching running-routers,
38789 - DirPostPeriod for posting server descriptor,
38790 - RendPostPeriod for posting hidden service descriptors.
38791 - Make sure the hidden service descriptors are at a random offset
38792 from each other, to hinder linkability.
38795 Changes in version 0.0.9pre5 - 2004-11-09
38796 o Bugfixes on 0.0.9pre4:
38797 - Fix a seg fault in unit tests (doesn't affect main program).
38798 - Fix an assert bug where a hidden service provider would fail if
38799 the first hop of his rendezvous circuit was down.
38800 - Hidden service operators now correctly handle version 1 style
38801 INTRODUCE1 cells (nobody generates them still, so not a critical
38803 - If do_hup fails, actually notice.
38804 - Handle more errnos from accept() without closing the listener.
38805 Some OpenBSD machines were closing their listeners because
38806 they ran out of file descriptors.
38807 - Send resolve cells to exit routers that are running a new
38808 enough version of the resolve code to work right.
38809 - Better handling of winsock includes on non-MSV win32 compilers.
38810 - Some people had wrapped their tor client/server in a script
38811 that would restart it whenever it died. This did not play well
38812 with our "shut down if your version is obsolete" code. Now people
38813 don't fetch a new directory if their local cached version is
38815 - Make our autogen.sh work on ksh as well as bash.
38818 - Hibernation: New config option "AccountingMaxKB" lets you
38819 set how many KBytes per month you want to allow your server to
38820 consume. Rather than spreading those bytes out evenly over the
38821 month, we instead hibernate for some of the month and pop up
38822 at a deterministic time, work until the bytes are consumed, then
38823 hibernate again. Config option "MonthlyAccountingStart" lets you
38824 specify which day of the month your billing cycle starts on.
38825 - Control interface: a separate program can now talk to your
38826 client/server over a socket, and get/set config options, receive
38827 notifications of circuits and streams starting/finishing/dying,
38828 bandwidth used, etc. The next step is to get some GUIs working.
38829 Let us know if you want to help out. See doc/control-spec.txt .
38830 - Ship a contrib/tor-control.py as an example script to interact
38831 with the control port.
38832 - "tor --hash-password zzyxz" will output a salted password for
38833 use in authenticating to the control interface.
38834 - New log format in config:
38835 "Log minsev[-maxsev] stdout|stderr|syslog" or
38836 "Log minsev[-maxsev] file /var/foo"
38839 - DirPolicy config option, to let people reject incoming addresses
38840 from their dirserver.
38841 - "tor --list-fingerprint" will list your identity key fingerprint
38843 - Add "pass" target for RedirectExit, to make it easier to break
38844 out of a sequence of RedirectExit rules.
38845 - Clients now generate a TLS cert too, in preparation for having
38846 them act more like real nodes.
38847 - Ship src/win32/ in the tarball, so people can use it to build.
38848 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
38850 - New "router-status" line in directory, to better bind each verified
38851 nickname to its identity key.
38852 - Deprecate unofficial config option abbreviations, and abbreviations
38853 not on the command line.
38854 - Add a pure-C tor-resolve implementation.
38855 - Use getrlimit and friends to ensure we can reach MaxConn (currently
38856 1024) file descriptors.
38858 o Code security improvements, inspired by Ilja:
38859 - Replace sprintf with snprintf. (I think they were all safe, but
38861 - Replace strcpy/strncpy with strlcpy in more places.
38862 - Avoid strcat; use snprintf or strlcat instead.
38863 - snprintf wrapper with consistent (though not C99) overflow behavior.
38866 Changes in version 0.0.9pre4 - 2004-10-17
38867 o Bugfixes on 0.0.9pre3:
38868 - If the server doesn't specify an exit policy, use the real default
38869 exit policy, not reject *:*.
38870 - Ignore fascistfirewall when uploading/downloading hidden service
38871 descriptors, since we go through Tor for those; and when using
38872 an HttpProxy, since we assume it can reach them all.
38873 - When looking for an authoritative dirserver, use only the ones
38874 configured at boot. Don't bother looking in the directory.
38875 - The rest of the fix for get_default_conf_file() on older win32.
38876 - Make 'Routerfile' config option obsolete.
38879 - New 'MyFamily nick1,...' config option for a server to
38880 specify other servers that shouldn't be used in the same circuit
38881 with it. Only believed if nick1 also specifies us.
38882 - New 'NodeFamily nick1,nick2,...' config option for a client to
38883 specify nodes that it doesn't want to use in the same circuit.
38884 - New 'Redirectexit pattern address:port' config option for a
38885 server to redirect exit connections, e.g. to a local squid.
38888 Changes in version 0.0.9pre3 - 2004-10-13
38889 o Bugfixes on 0.0.8.1:
38890 - Better torrc example lines for dirbindaddress and orbindaddress.
38891 - Improved bounds checking on parsed ints (e.g. config options and
38892 the ones we find in directories.)
38893 - Better handling of size_t vs int, so we're more robust on 64
38895 - Fix the rest of the bug where a newly started OR would appear
38896 as unverified even after we've added his fingerprint and hupped
38898 - Fix a bug from 0.0.7: when read() failed on a stream, we would
38899 close it without sending back an end. So 'connection refused'
38900 would simply be ignored and the user would get no response.
38902 o Bugfixes on 0.0.9pre2:
38903 - Serving the cached-on-disk directory to people is bad. We now
38904 provide no directory until we've fetched a fresh one.
38905 - Workaround for bug on windows where cached-directories get crlf
38907 - Make get_default_conf_file() work on older windows too.
38908 - If we write a *:* exit policy line in the descriptor, don't write
38909 any more exit policy lines.
38912 - Use only 0.0.9pre1 and later servers for resolve cells.
38913 - Make the dirservers file obsolete.
38914 - Include a dir-signing-key token in directories to tell the
38915 parsing entity which key is being used to sign.
38916 - Remove the built-in bulky default dirservers string.
38917 - New config option "Dirserver %s:%d [fingerprint]", which can be
38918 repeated as many times as needed. If no dirservers specified,
38919 default to moria1,moria2,tor26.
38920 - Make moria2 advertise a dirport of 80, so people behind firewalls
38921 will be able to get a directory.
38922 - Http proxy support
38923 - Dirservers translate requests for http://%s:%d/x to /x
38924 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
38925 be routed through this host.
38926 - Clients ask for /tor/x rather than /x for new enough dirservers.
38927 This way we can one day coexist peacefully with apache.
38928 - Clients specify a "Host: %s%d" http header, to be compatible
38929 with more proxies, and so running squid on an exit node can work.
38932 Changes in version 0.0.8.1 - 2004-10-13
38934 - Fix a seg fault that can be triggered remotely for Tor
38935 clients/servers with an open dirport.
38936 - Fix a rare assert trigger, where routerinfos for entries in
38937 our cpath would expire while we're building the path.
38938 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38939 - Fix a rare seg fault for people running hidden services on
38940 intermittent connections.
38941 - Fix a bug in parsing opt keywords with objects.
38942 - Fix a stale pointer assert bug when a stream detaches and
38944 - Fix a string format vulnerability (probably not exploitable)
38945 in reporting stats locally.
38946 - Fix an assert trigger: sometimes launching circuits can fail
38947 immediately, e.g. because too many circuits have failed recently.
38948 - Fix a compile warning on 64 bit platforms.
38951 Changes in version 0.0.9pre2 - 2004-10-03
38953 - Make fetching a cached directory work for 64-bit platforms too.
38954 - Make zlib.h a required header, not an optional header.
38957 Changes in version 0.0.9pre1 - 2004-10-01
38959 - Stop using separate defaults for no-config-file and
38960 empty-config-file. Now you have to explicitly turn off SocksPort,
38961 if you don't want it open.
38962 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38963 - Improve man page to mention more of the 0.0.8 features.
38964 - Fix a rare seg fault for people running hidden services on
38965 intermittent connections.
38966 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
38968 - Fix more dns related bugs: send back resolve_failed and end cells
38969 more reliably when the resolve fails, rather than closing the
38970 circuit and then trying to send the cell. Also attach dummy resolve
38971 connections to a circuit *before* calling dns_resolve(), to fix
38972 a bug where cached answers would never be sent in RESOLVED cells.
38973 - When we run out of disk space, or other log writing error, don't
38974 crash. Just stop logging to that log and continue.
38975 - We were starting to daemonize before we opened our logs, so if
38976 there were any problems opening logs, we would complain to stderr,
38977 which wouldn't work, and then mysteriously exit.
38978 - Fix a rare bug where sometimes a verified OR would connect to us
38979 before he'd uploaded his descriptor, which would cause us to
38980 assign conn->nickname as though he's unverified. Now we look through
38981 the fingerprint list to see if he's there.
38982 - Fix a rare assert trigger, where routerinfos for entries in
38983 our cpath would expire while we're building the path.
38986 - Clients can ask dirservers for /dir.z to get a compressed version
38987 of the directory. Only works for servers running 0.0.9, of course.
38988 - Make clients cache directories and use them to seed their router
38989 lists at startup. This means clients have a datadir again.
38990 - Configuration infrastructure support for warning on obsolete
38992 - Respond to content-encoding headers by trying to uncompress as
38994 - Reply with a deflated directory when a client asks for "dir.z".
38995 We could use allow-encodings instead, but allow-encodings isn't
38996 specified in HTTP 1.0.
38997 - Raise the max dns workers from 50 to 100.
38998 - Discourage people from setting their dirfetchpostperiod more often
38999 than once per minute.
39000 - Protect dirservers from overzealous descriptor uploading -- wait
39001 10 seconds after directory gets dirty, before regenerating.
39004 Changes in version 0.0.8 - 2004-08-25
39005 o Port it to SunOS 5.9 / Athena
39008 Changes in version 0.0.8rc2 - 2004-08-20
39009 o Make it compile on cygwin again.
39010 o When picking unverified routers, skip those with low uptime and/or
39011 low bandwidth, depending on what properties you care about.
39014 Changes in version 0.0.8rc1 - 2004-08-18
39015 o Changes from 0.0.7.3:
39017 - Fix assert triggers: if the other side returns an address 0.0.0.0,
39018 don't put it into the client dns cache.
39019 - If a begin failed due to exit policy, but we believe the IP address
39020 should have been allowed, switch that router to exitpolicy reject *:*
39021 until we get our next directory.
39023 - Clients choose nodes proportional to advertised bandwidth.
39024 - Avoid using nodes with low uptime as introduction points.
39025 - Handle servers with dynamic IP addresses: don't replace
39026 options->Address with the resolved one at startup, and
39027 detect our address right before we make a routerinfo each time.
39028 - 'FascistFirewall' option to pick dirservers and ORs on specific
39029 ports; plus 'FirewallPorts' config option to tell FascistFirewall
39030 which ports are open. (Defaults to 80,443)
39031 - Be more aggressive about trying to make circuits when the network
39032 has changed (e.g. when you unsuspend your laptop).
39033 - Check for time skew on http headers; report date in response to
39035 - If the entrynode config line has only one node, don't pick it as
39037 - Add strict{entry|exit}nodes config options. If set to 1, then
39038 we refuse to build circuits that don't include the specified entry
39040 - OutboundBindAddress config option, to bind to a specific
39041 IP address for outgoing connect()s.
39042 - End truncated log entries (e.g. directories) with "[truncated]".
39044 o Patches to 0.0.8preX:
39046 - Patches to compile and run on win32 again (maybe)?
39047 - Fix crash when looking for ~/.torrc with no $HOME set.
39048 - Fix a race bug in the unit tests.
39049 - Handle verified/unverified name collisions better when new
39050 routerinfo's arrive in a directory.
39051 - Sometimes routers were getting entered into the stats before
39052 we'd assigned their identity_digest. Oops.
39053 - Only pick and establish intro points after we've gotten a
39056 - AllowUnverifiedNodes config option to let circuits choose no-name
39057 routers in entry,middle,exit,introduction,rendezvous positions.
39058 Allow middle and rendezvous positions by default.
39059 - Add a man page for tor-resolve.
39062 Changes in version 0.0.7.3 - 2004-08-12
39063 o Stop dnsworkers from triggering an assert failure when you
39064 ask them to resolve the host "".
39067 Changes in version 0.0.8pre3 - 2004-08-09
39068 o Changes from 0.0.7.2:
39069 - Allow multiple ORs with same nickname in routerlist -- now when
39070 people give us one identity key for a nickname, then later
39071 another, we don't constantly complain until the first expires.
39072 - Remember used bandwidth (both in and out), and publish 15-minute
39073 snapshots for the past day into our descriptor.
39074 - You can now fetch $DIRURL/running-routers to get just the
39075 running-routers line, not the whole descriptor list. (But
39076 clients don't use this yet.)
39077 - When people mistakenly use Tor as an http proxy, point them
39078 at the tor-doc.html rather than the INSTALL.
39079 - Remove our mostly unused -- and broken -- hex_encode()
39080 function. Use base16_encode() instead. (Thanks to Timo Lindfors
39081 for pointing out this bug.)
39082 - Rotate onion keys every 12 hours, not every 2 hours, so we have
39083 fewer problems with people using the wrong key.
39084 - Change the default exit policy to reject the default edonkey,
39085 kazaa, gnutella ports.
39086 - Add replace_file() to util.[ch] to handle win32's rename().
39088 o Changes from 0.0.8preX:
39089 - Fix two bugs in saving onion keys to disk when rotating, so
39090 hopefully we'll get fewer people using old onion keys.
39091 - Fix an assert error that was making SocksPolicy not work.
39092 - Be willing to expire routers that have an open dirport -- it's
39093 just the authoritative dirservers we want to not forget.
39094 - Reject tor-resolve requests for .onion addresses early, so we
39095 don't build a whole rendezvous circuit and then fail.
39096 - When you're warning a server that he's unverified, don't cry
39097 wolf unpredictably.
39098 - Fix a race condition: don't try to extend onto a connection
39099 that's still handshaking.
39100 - For servers in clique mode, require the conn to be open before
39101 you'll choose it for your path.
39102 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
39103 end relay cell, etc.
39104 - Measure bandwidth capacity over the last 24 hours, not just 12
39105 - Bugfix: authoritative dirservers were making and signing a new
39106 directory for each client, rather than reusing the cached one.
39109 Changes in version 0.0.8pre2 - 2004-08-04
39110 o Changes from 0.0.7.2:
39112 - Check directory signature _before_ you decide whether you're
39113 you're running an obsolete version and should exit.
39114 - Check directory signature _before_ you parse the running-routers
39115 list to decide who's running or verified.
39116 - Bugfixes and features:
39117 - Check return value of fclose while writing to disk, so we don't
39118 end up with broken files when servers run out of disk space.
39119 - Log a warning if the user uses an unsafe socks variant, so people
39120 are more likely to learn about privoxy or socat.
39121 - Dirservers now include RFC1123-style dates in the HTTP headers,
39122 which one day we will use to better detect clock skew.
39124 o Changes from 0.0.8pre1:
39125 - Make it compile without warnings again on win32.
39126 - Log a warning if you're running an unverified server, to let you
39127 know you might want to get it verified.
39128 - Only pick a default nickname if you plan to be a server.
39131 Changes in version 0.0.8pre1 - 2004-07-23
39133 - Made our unit tests compile again on OpenBSD 3.5, and tor
39134 itself compile again on OpenBSD on a sparc64.
39135 - We were neglecting milliseconds when logging on win32, so
39136 everything appeared to happen at the beginning of each second.
39138 o Protocol changes:
39139 - 'Extend' relay cell payloads now include the digest of the
39140 intended next hop's identity key. Now we can verify that we're
39141 extending to the right router, and also extend to routers we
39142 hadn't heard of before.
39145 - Tor nodes can now act as relays (with an advertised ORPort)
39146 without being manually verified by the dirserver operators.
39147 - Uploaded descriptors of unverified routers are now accepted
39148 by the dirservers, and included in the directory.
39149 - Verified routers are listed by nickname in the running-routers
39150 list; unverified routers are listed as "$<fingerprint>".
39151 - We now use hash-of-identity-key in most places rather than
39152 nickname or addr:port, for improved security/flexibility.
39153 - To avoid Sybil attacks, paths still use only verified servers.
39154 But now we have a chance to play around with hybrid approaches.
39155 - Nodes track bandwidth usage to estimate capacity (not used yet).
39156 - ClientOnly option for nodes that never want to become servers.
39157 - Directory caching.
39158 - "AuthoritativeDir 1" option for the official dirservers.
39159 - Now other nodes (clients and servers) will cache the latest
39160 directory they've pulled down.
39161 - They can enable their DirPort to serve it to others.
39162 - Clients will pull down a directory from any node with an open
39163 DirPort, and check the signature/timestamp correctly.
39164 - Authoritative dirservers now fetch directories from other
39165 authdirservers, to stay better synced.
39166 - Running-routers list tells who's down also, along with noting
39167 if they're verified (listed by nickname) or unverified (listed
39169 - Allow dirservers to serve running-router list separately.
39170 This isn't used yet.
39171 - ORs connect-on-demand to other ORs
39172 - If you get an extend cell to an OR you're not connected to,
39173 connect, handshake, and forward the create cell.
39174 - The authoritative dirservers stay connected to everybody,
39175 and everybody stays connected to 0.0.7 servers, but otherwise
39176 clients/servers expire unused connections after 5 minutes.
39177 - When servers get a sigint, they delay 30 seconds (refusing new
39178 connections) then exit. A second sigint causes immediate exit.
39179 - File and name management:
39180 - Look for .torrc if no CONFDIR "torrc" is found.
39181 - If no datadir is defined, then choose, make, and secure ~/.tor
39183 - If torrc not found, exitpolicy reject *:*.
39184 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
39185 - If no nickname is defined, derive default from hostname.
39186 - Rename secret key files, e.g. identity.key -> secret_id_key,
39187 to discourage people from mailing their identity key to tor-ops.
39188 - Refuse to build a circuit before the directory has arrived --
39189 it won't work anyway, since you won't know the right onion keys
39191 - Try other dirservers immediately if the one you try is down. This
39192 should tolerate down dirservers better now.
39193 - Parse tor version numbers so we can do an is-newer-than check
39194 rather than an is-in-the-list check.
39195 - New socks command 'resolve', to let us shim gethostbyname()
39197 - A 'tor_resolve' script to access the socks resolve functionality.
39198 - A new socks-extensions.txt doc file to describe our
39199 interpretation and extensions to the socks protocols.
39200 - Add a ContactInfo option, which gets published in descriptor.
39201 - Publish OR uptime in descriptor (and thus in directory) too.
39202 - Write tor version at the top of each log file
39203 - New docs in the tarball:
39205 - Document that you should proxy your SSL traffic too.
39208 Changes in version 0.0.7.2 - 2004-07-07
39209 o A better fix for the 0.0.0.0 problem, that will hopefully
39210 eliminate the remaining related assertion failures.
39213 Changes in version 0.0.7.1 - 2004-07-04
39214 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
39215 since internally we use 0.0.0.0 to signify "not yet resolved".
39218 Changes in version 0.0.7 - 2004-06-07
39219 o Updated the man page to reflect the new features.
39222 Changes in version 0.0.7rc2 - 2004-06-06
39223 o Changes from 0.0.7rc1:
39224 - Make it build on Win32 again.
39225 o Changes from 0.0.6.2:
39226 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
39230 Changes in version 0.0.7rc1 - 2004-06-02
39232 - On sighup, we were adding another log without removing the first
39233 one. So log messages would get duplicated n times for n sighups.
39234 - Several cases of using a connection after we'd freed it. The
39235 problem was that connections that are pending resolve are in both
39236 the pending_resolve tree, and also the circuit's resolving_streams
39237 list. When you want to remove one, you must remove it from both.
39238 - Fix a double-mark-for-close where an end cell arrived for a
39239 resolving stream, and then the resolve failed.
39240 - Check directory signatures based on name of signer, not on whom
39241 we got the directory from. This will let us cache directories more
39244 - Crank up some of our constants to handle more users.
39247 Changes in version 0.0.7pre1 - 2004-06-02
39248 o Fixes for crashes and other obnoxious bugs:
39249 - Fix an epipe bug: sometimes when directory connections failed
39250 to connect, we would give them a chance to flush before closing
39252 - When we detached from a circuit because of resolvefailed, we
39253 would immediately try the same circuit twice more, and then
39254 give up on the resolve thinking we'd tried three different
39256 - Limit the number of intro circuits we'll attempt to build for a
39257 hidden service per 15-minute period.
39258 - Check recommended-software string *early*, before actually parsing
39259 the directory. Thus we can detect an obsolete version and exit,
39260 even if the new directory format doesn't parse.
39261 o Fixes for security bugs:
39262 - Remember which nodes are dirservers when you startup, and if a
39263 random OR enables his dirport, don't automatically assume he's
39264 a trusted dirserver.
39266 - Directory connections were asking the wrong poll socket to
39267 start writing, and not asking themselves to start writing.
39268 - When we detached from a circuit because we sent a begin but
39269 didn't get a connected, we would use it again the first time;
39270 but after that we would correctly switch to a different one.
39271 - Stop warning when the first onion decrypt attempt fails; they
39272 will sometimes legitimately fail now that we rotate keys.
39273 - Override unaligned-access-ok check when $host_cpu is ia64 or
39274 arm. Apparently they allow it but the kernel whines.
39275 - Dirservers try to reconnect periodically too, in case connections
39277 - Fix some memory leaks in directory servers.
39278 - Allow backslash in Win32 filenames.
39279 - Made Tor build complain-free on FreeBSD, hopefully without
39280 breaking other BSD builds. We'll see.
39282 - Doxygen markup on all functions and global variables.
39283 - Make directory functions update routerlist, not replace it. So
39284 now directory disagreements are not so critical a problem.
39285 - Remove the upper limit on number of descriptors in a dirserver's
39286 directory (not that we were anywhere close).
39287 - Allow multiple logfiles at different severity ranges.
39288 - Allow *BindAddress to specify ":port" rather than setting *Port
39289 separately. Allow multiple instances of each BindAddress config
39290 option, so you can bind to multiple interfaces if you want.
39291 - Allow multiple exit policy lines, which are processed in order.
39292 Now we don't need that huge line with all the commas in it.
39293 - Enable accept/reject policies on SOCKS connections, so you can bind
39294 to 0.0.0.0 but still control who can use your OP.
39297 Changes in version 0.0.6.2 - 2004-05-16
39298 o Our integrity-checking digest was checking only the most recent cell,
39299 not the previous cells like we'd thought.
39300 Thanks to Stefan Mark for finding the flaw!
39303 Changes in version 0.0.6.1 - 2004-05-06
39304 o Fix two bugs in our AES counter-mode implementation (this affected
39305 onion-level stream encryption, but not TLS-level). It turns
39306 out we were doing something much more akin to a 16-character
39307 polyalphabetic cipher. Oops.
39308 Thanks to Stefan Mark for finding the flaw!
39309 o Retire moria3 as a directory server, and add tor26 as a directory
39313 Changes in version 0.0.6 - 2004-05-02
39314 [version bump only]
39317 Changes in version 0.0.6rc4 - 2004-05-01
39318 o Update the built-in dirservers list to use the new directory format
39319 o Fix a rare seg fault: if a node offering a hidden service attempts
39320 to build a circuit to Alice's rendezvous point and fails before it
39321 reaches the last hop, it retries with a different circuit, but
39323 o Handle windows socket errors correctly.
39326 Changes in version 0.0.6rc3 - 2004-04-28
39327 o Don't expire non-general excess circuits (if we had enough
39328 circuits open, we were expiring rendezvous circuits -- even
39329 when they had a stream attached. oops.)
39330 o Fetch randomness from /dev/urandom better (not via fopen/fread)
39331 o Better debugging for tls errors
39332 o Some versions of openssl have an SSL_pending function that erroneously
39333 returns bytes when there is a non-application record pending.
39334 o Set Content-Type on the directory and hidserv descriptor.
39335 o Remove IVs from cipher code, since AES-ctr has none.
39336 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
39337 o We were using an array of length zero in a few places.
39338 o win32's gethostbyname can't resolve an IP to an IP.
39339 o win32's close can't close a socket.
39342 Changes in version 0.0.6rc2 - 2004-04-26
39343 o Fix a bug where we were closing tls connections intermittently.
39344 It turns out openssl keeps its errors around -- so if an error
39345 happens, and you don't ask about it, and then another openssl
39346 operation happens and succeeds, and you ask if there was an error,
39347 it tells you about the first error. Fun fun.
39348 o Fix a bug that's been lurking since 27 may 03 (!)
39349 When passing back a destroy cell, we would use the wrong circ id.
39350 'Mostly harmless', but still worth fixing.
39351 o Since we don't support truncateds much, don't bother sending them;
39352 just close the circ.
39353 o check for <machine/limits.h> so we build on NetBSD again (I hope).
39354 o don't crash if a conn that sent a begin has suddenly lost its circuit
39355 (this was quite rare).
39358 Changes in version 0.0.6rc1 - 2004-04-25
39359 o We now rotate link (tls context) keys and onion keys.
39360 o CREATE cells now include oaep padding, so you can tell
39361 if you decrypted them correctly.
39362 o Add bandwidthburst to server descriptor.
39363 o Directories now say which dirserver signed them.
39364 o Use a tor_assert macro that logs failed assertions too.
39367 Changes in version 0.0.6pre5 - 2004-04-18
39368 o changes from 0.0.6pre4:
39369 - make tor build on broken freebsd 5.2 installs
39370 - fix a failed assert when you try an intro point, get a nack, and try
39371 a second one and it works.
39372 - when alice uses a port that the hidden service doesn't accept,
39373 it now sends back an end cell (denied by exit policy). otherwise
39374 alice would just have to wait to time out.
39375 - fix another rare bug: when we had tried all the intro
39376 points for a hidden service, we fetched the descriptor
39377 again, but we left our introcirc thinking it had already
39378 sent an intro, so it kept waiting for a response...
39379 - bugfix: when you sleep your hidden-service laptop, as soon
39380 as it wakes up it tries to upload a service descriptor, but
39381 socketpair fails for some reason (localhost not up yet?).
39382 now we simply give up on that upload, and we'll try again later.
39383 i'd still like to find the bug though.
39384 - if an intro circ waiting for an ack dies before getting one, then
39386 - we were reusing stale service descriptors and refetching usable
39390 Changes in version 0.0.6pre4 - 2004-04-14
39391 o changes from 0.0.6pre3:
39392 - when bob fails to connect to the rendezvous point, and his
39393 circ didn't fail because of the rendezvous point itself, then
39394 he retries a couple of times
39395 - we expire introduction and rendezvous circs more thoroughly
39396 (sometimes they were hanging around forever)
39397 - we expire unattached rendezvous streams that have been around
39398 too long (they were sticking around forever).
39399 - fix a measly fencepost error that was crashing everybody with
39403 Changes in version 0.0.6pre3 - 2004-04-14
39404 o changes from 0.0.6pre2:
39405 - make hup work again
39406 - fix some memory leaks for dirservers
39407 - allow more skew in rendezvous descriptor timestamps, to help
39408 handle people like blanu who don't know what time it is
39409 - normal circs are 3 hops, but some rend/intro circs are 4, if
39410 the initiator doesn't get to choose the last hop
39411 - send acks for introductions, so alice can know whether to try
39413 - bob publishes intro points more correctly
39414 o changes from 0.0.5:
39415 - fix an assert trigger that's been plaguing us since the days
39416 of 0.0.2prexx (thanks weasel!)
39417 - retry stream correctly when we fail to connect because of
39418 exit-policy-reject (should try another) or can't-resolve-address
39419 (also should try another, because dns on random internet servers
39421 - when we hup a dirserver and we've *removed* a server from the
39422 approved-routers list, now we remove that server from the
39423 in-memory directories too
39426 Changes in version 0.0.6pre2 - 2004-04-08
39427 o We fixed our base32 implementation. Now it works on all architectures.
39430 Changes in version 0.0.6pre1 - 2004-04-08
39432 - Hidden services and rendezvous points are implemented. Go to
39433 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
39434 hidden services. (This only works via a socks4a proxy such as
39435 Privoxy, and currently it's quite slow.)
39438 Changes in version 0.0.5 - 2004-03-30
39439 [version bump only]
39442 Changes in version 0.0.5rc3 - 2004-03-29
39443 o Install torrc as torrc.sample -- we no longer clobber your
39445 o Re-enable recommendedversion checking (we broke it in rc2, oops)
39446 o Add in a 'notice' log level for things the operator should hear
39447 but that aren't warnings
39450 Changes in version 0.0.5rc2 - 2004-03-29
39451 o Hold socks connection open until reply is flushed (if possible)
39452 o Make exit nodes resolve IPs to IPs immediately, rather than asking
39453 the dns farm to do it.
39454 o Fix c99 aliasing warnings in rephist.c
39455 o Don't include server descriptors that are older than 24 hours in the
39457 o Give socks 'reject' replies their whole 15s to attempt to flush,
39458 rather than seeing the 60s timeout and assuming the flush had failed.
39459 o Clean automake droppings from the cvs repository
39462 Changes in version 0.0.5rc1 - 2004-03-28
39463 o Fix mangled-state bug in directory fetching (was causing sigpipes).
39464 o Only build circuits after we've fetched the directory: clients were
39465 using only the directory servers before they'd fetched a directory.
39466 This also means longer startup time; so it goes.
39467 o Fix an assert trigger where an OP would fail to handshake, and we'd
39468 expect it to have a nickname.
39469 o Work around a tsocks bug: do a socks reject when AP connection dies
39470 early, else tsocks goes into an infinite loop.
39473 Changes in version 0.0.4 - 2004-03-26
39474 o When connecting to a dirserver or OR and the network is down,
39478 Changes in version 0.0.3 - 2004-03-26
39479 o Warn and fail if server chose a nickname with illegal characters
39480 o Port to Solaris and Sparc:
39481 - include missing header fcntl.h
39482 - have autoconf find -lsocket -lnsl automatically
39483 - deal with hardware word alignment
39484 - make uname() work (solaris has a different return convention)
39485 - switch from using signal() to sigaction()
39486 o Preliminary work on reputation system:
39487 - Keep statistics on success/fail of connect attempts; they're published
39488 by kill -USR1 currently.
39489 - Add a RunTesting option to try to learn link state by creating test
39490 circuits, even when SocksPort is off.
39491 - Remove unused open circuits when there are too many.
39494 Changes in version 0.0.2 - 2004-03-19
39495 - Include strlcpy and strlcat for safer string ops
39496 - define INADDR_NONE so we compile (but still not run) on solaris
39499 Changes in version 0.0.2pre27 - 2004-03-14
39501 - Allow internal tor networks (we were rejecting internal IPs,
39502 now we allow them if they're set explicitly).
39503 - And fix a few endian issues.
39506 Changes in version 0.0.2pre26 - 2004-03-14
39508 - If a stream times out after 15s without a connected cell, don't
39509 try that circuit again: try a new one.
39510 - Retry streams at most 4 times. Then give up.
39511 - When a dirserver gets a descriptor from an unknown router, it
39512 logs its fingerprint (so the dirserver operator can choose to
39513 accept it even without mail from the server operator).
39514 - Inform unapproved servers when we reject their descriptors.
39515 - Make tor build on Windows again. It works as a client, who knows
39517 - Clearer instructions in the torrc for how to set up a server.
39518 - Be more efficient about reading fd's when our global token bucket
39519 (used for rate limiting) becomes empty.
39521 - Stop asserting that computers always go forward in time. It's
39523 - When we sent a cell (e.g. destroy) and then marked an OR connection
39524 expired, we might close it before finishing a flush if the other
39525 side isn't reading right then.
39526 - Don't allow dirservers to start if they haven't defined
39527 RecommendedVersions
39528 - We were caching transient dns failures. Oops.
39529 - Prevent servers from publishing an internal IP as their address.
39530 - Address a strcat vulnerability in circuit.c
39533 Changes in version 0.0.2pre25 - 2004-03-04
39535 - Put the OR's IP in its router descriptor, not its fqdn. That way
39536 we'll stop being stalled by gethostbyname for nodes with flaky dns,
39539 - If the user typed in an address that didn't resolve, the server
39543 Changes in version 0.0.2pre24 - 2004-03-03
39545 - Fix an assertion failure in dns.c, where we were trying to dequeue
39546 a pending dns resolve even if it wasn't pending
39547 - Fix a spurious socks5 warning about still trying to write after the
39548 connection is finished.
39549 - Hold certain marked_for_close connections open until they're finished
39550 flushing, rather than losing bytes by closing them too early.
39551 - Correctly report the reason for ending a stream
39552 - Remove some duplicate calls to connection_mark_for_close
39553 - Put switch_id and start_daemon earlier in the boot sequence, so it
39554 will actually try to chdir() to options.DataDirectory
39555 - Make 'make test' exit(1) if a test fails; fix some unit tests
39556 - Make tor fail when you use a config option it doesn't know about,
39557 rather than warn and continue.
39558 - Make --version work
39559 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
39562 Changes in version 0.0.2pre23 - 2004-02-29
39564 - Print a statement when the first circ is finished, so the user
39565 knows it's working.
39566 - If a relay cell is unrecognized at the end of the circuit,
39567 send back a destroy. (So attacks to mutate cells are more
39569 - New config option 'excludenodes' to avoid certain nodes for circuits.
39570 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
39571 so you can collect coredumps there.
39573 - Fix a bug in tls flushing where sometimes data got wedged and
39574 didn't flush until more data got sent. Hopefully this bug was
39575 a big factor in the random delays we were seeing.
39576 - Make 'connected' cells include the resolved IP, so the client
39577 dns cache actually gets populated.
39578 - Disallow changing from ORPort=0 to ORPort>0 on hup.
39579 - When we time-out on a stream and detach from the circuit, send an
39580 end cell down it first.
39581 - Only warn about an unknown router (in exitnodes, entrynodes,
39582 excludenodes) after we've fetched a directory.
39585 Changes in version 0.0.2pre22 - 2004-02-26
39587 - Servers publish less revealing uname information in descriptors.
39588 - More memory tracking and assertions, to crash more usefully when
39590 - If the default torrc isn't there, just use some default defaults.
39591 Plus provide an internal dirservers file if they don't have one.
39592 - When the user tries to use Tor as an http proxy, give them an http
39593 501 failure explaining that we're a socks proxy.
39594 - Dump a new router.desc on hup, to help confused people who change
39595 their exit policies and then wonder why router.desc doesn't reflect
39597 - Clean up the generic tor.sh init script that we ship with.
39599 - If the exit stream is pending on the resolve, and a destroy arrives,
39600 then the stream wasn't getting removed from the pending list. I
39601 think this was the one causing recent server crashes.
39602 - Use a more robust poll on OSX 10.3, since their poll is flaky.
39603 - When it couldn't resolve any dirservers, it was useless from then on.
39604 Now it reloads the RouterFile (or default dirservers) if it has no
39606 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
39607 many users don't even *have* a /usr/local/sbin/.
39610 Changes in version 0.0.2pre21 - 2004-02-18
39612 - There's a ChangeLog file that actually reflects the changelog.
39613 - There's a 'torify' wrapper script, with an accompanying
39614 tor-tsocks.conf, that simplifies the process of using tsocks for
39615 tor. It even has a man page.
39616 - The tor binary gets installed to sbin rather than bin now.
39617 - Retry streams where the connected cell hasn't arrived in 15 seconds
39618 - Clean up exit policy handling -- get the default out of the torrc,
39619 so we can update it without forcing each server operator to fix
39621 - Allow imaps and pop3s in default exit policy
39623 - Prevent picking middleman nodes as the last node in the circuit
39626 Changes in version 0.0.2pre20 - 2004-01-30
39628 - We now have a deb package, and it's in debian unstable. Go to
39629 it, apt-getters. :)
39630 - I've split the TotalBandwidth option into BandwidthRate (how many
39631 bytes per second you want to allow, long-term) and
39632 BandwidthBurst (how many bytes you will allow at once before the cap
39633 kicks in). This better token bucket approach lets you, say, set
39634 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
39635 performance while not exceeding your monthly bandwidth quota.
39636 - Push out a tls record's worth of data once you've got it, rather
39637 than waiting until you've read everything waiting to be read. This
39638 may improve performance by pipelining better. We'll see.
39639 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
39640 from failed circuits (if they haven't been connected yet) and attach
39642 - Expire old streams that haven't managed to connect. Some day we'll
39643 have them reattach to new circuits instead.
39646 - Fix several memory leaks that were causing servers to become bloated
39648 - Fix a few very rare assert triggers. A few more remain.
39649 - Setuid to User _before_ complaining about running as root.
39652 Changes in version 0.0.2pre19 - 2004-01-07
39654 - Fix deadlock condition in dns farm. We were telling a child to die by
39655 closing the parent's file descriptor to him. But newer children were
39656 inheriting the open file descriptor from the parent, and since they
39657 weren't closing it, the socket never closed, so the child never read
39658 eof, so he never knew to exit. Similarly, dns workers were holding
39659 open other sockets, leading to all sorts of chaos.
39660 - New cleaner daemon() code for forking and backgrounding.
39661 - If you log to a file, it now prints an entry at the top of the
39662 logfile so you know it's working.
39663 - The onionskin challenge length was 30 bytes longer than necessary.
39664 - Started to patch up the spec so it's not quite so out of date.
39667 Changes in version 0.0.2pre18 - 2004-01-02
39669 - Fix endian issues with the 'integrity' field in the relay header.
39670 - Fix a potential bug where connections in state
39671 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
39674 Changes in version 0.0.2pre17 - 2003-12-30
39676 - Made --debuglogfile (or any second log file, actually) work.
39677 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
39678 adversary could force us into an infinite loop.
39681 - Each onionskin handshake now includes a hash of the computed key,
39682 to prove the server's identity and help perfect forward secrecy.
39683 - Changed cell size from 256 to 512 bytes (working toward compatibility
39685 - Changed cell length to 2 bytes, and moved it to the relay header.
39686 - Implemented end-to-end integrity checking for the payloads of
39688 - Separated streamid from 'recognized' (otherwise circuits will get
39689 messed up when we try to have streams exit from the middle). We
39690 use the integrity-checking to confirm that a cell is addressed to
39692 - Randomize the initial circid and streamid values, so an adversary who
39693 breaks into a node can't learn how many circuits or streams have
39697 Changes in version 0.0.2pre16 - 2003-12-14
39699 - Fixed a bug that made HUP trigger an assert
39700 - Fixed a bug where a circuit that immediately failed wasn't being
39701 counted as a failed circuit in counting retries.
39704 - Now we close the circuit when we get a truncated cell: otherwise we're
39705 open to an anonymity attack where a bad node in the path truncates
39706 the circuit and then we open streams at him.
39707 - Add port ranges to exit policies
39708 - Add a conservative default exit policy
39709 - Warn if you're running tor as root
39710 - on HUP, retry OR connections and close/rebind listeners
39711 - options.EntryNodes: try these nodes first when picking the first node
39712 - options.ExitNodes: if your best choices happen to include any of
39713 your preferred exit nodes, you choose among just those preferred
39715 - options.ExcludedNodes: nodes that are never picked in path building
39718 Changes in version 0.0.2pre15 - 2003-12-03
39719 o Robustness and bugfixes:
39720 - Sometimes clients would cache incorrect DNS resolves, which would
39721 really screw things up.
39722 - An OP that goes offline would slowly leak all its sockets and stop
39724 - A wide variety of bugfixes in exit node selection, exit policy
39725 handling, and processing pending streams when a new circuit is
39727 - Pick nodes for a path only from those the directory says are up
39728 - Choose randomly from all running dirservers, not always the first one
39729 - Increase allowed http header size for directory fetch.
39730 - Stop writing to stderr (if we're daemonized it will be closed).
39731 - Enable -g always, so cores will be more useful to me.
39732 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
39735 - Wrote a man page. It lists commonly used options.
39738 - Change default loglevel to warn.
39739 - Make PidFile default to null rather than littering in your CWD.
39740 - OnionRouter config option is now obsolete. Instead it just checks
39742 - Moved to a single unified torrc file for both clients and servers.
39745 Changes in version 0.0.2pre14 - 2003-11-29
39746 o Robustness and bugfixes:
39747 - Force the admin to make the DataDirectory himself
39748 - to get ownership/permissions right
39749 - so clients no longer make a DataDirectory and then never use it
39750 - fix bug where a client who was offline for 45 minutes would never
39751 pull down a directory again
39752 - fix (or at least hide really well) the dns assert bug that was
39753 causing server crashes
39754 - warnings and improved robustness wrt clockskew for certs
39755 - use the native daemon(3) to daemonize, when available
39756 - exit if bind() fails
39757 - exit if neither socksport nor orport is defined
39758 - include our own tor_timegm (Win32 doesn't have its own)
39759 - bugfix for win32 with lots of connections
39760 - fix minor bias in PRNG
39761 - make dirserver more robust to corrupt cached directory
39764 - Wrote the design document (woo)
39766 o Circuit building and exit policies:
39767 - Circuits no longer try to use nodes that the directory has told them
39769 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
39770 bitcounts (18.0.0.0/8).
39771 - Make AP connections standby for a circuit if no suitable circuit
39772 exists, rather than failing
39773 - Circuits choose exit node based on addr/port, exit policies, and
39774 which AP connections are standing by
39775 - Bump min pathlen from 2 to 3
39776 - Relay end cells have a payload to describe why the stream ended.
39777 - If the stream failed because of exit policy, try again with a new
39779 - Clients have a dns cache to remember resolved addresses.
39780 - Notice more quickly when we have no working circuits
39783 - APPort is now called SocksPort
39784 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
39786 - RecommendedVersions is now a config variable rather than
39787 hardcoded (for dirservers)
39788 - Reloads config on HUP
39789 - Usage info on -h or --help
39790 - If you set User and Group config vars, it'll setu/gid to them.
39793 Changes in version 0.0.2pre13 - 2003-10-19
39794 o General stability:
39795 - SSL_write no longer fails when it returns WANTWRITE and the number
39796 of bytes in the buf has changed by the next SSL_write call.
39797 - Fix segfault fetching directory when network is down
39798 - Fix a variety of minor memory leaks
39799 - Dirservers reload the fingerprints file on HUP, so I don't have
39800 to take down the network when I approve a new router
39801 - Default server config file has explicit Address line to specify fqdn
39804 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
39805 - Make listener connections not ever alloc bufs
39807 o Autoconf improvements:
39808 - don't clobber an external CFLAGS in ./configure
39809 - Make install now works
39810 - create var/lib/tor on make install
39811 - autocreate a tor.sh initscript to help distribs
39812 - autocreate the torrc and sample-server-torrc with correct paths
39814 o Log files and Daemonizing now work:
39815 - If --DebugLogFile is specified, log to it at -l debug
39816 - If --LogFile is specified, use it instead of commandline
39817 - If --RunAsDaemon is set, tor forks and backgrounds on startup