1 Changes in version 0.4.7.9 - 2022-08-11
2 This version contains several major fixes aimed at reducing memory pressure on
3 relays and possible side-channel. It also contains a major bugfix related to
4 congestion control also aimed at reducing memory pressure on relays.
5 Finally, there is last one major bugfix related to Vanguard L2 layer node
8 We strongly recommend to upgrade to this version especially for Exit relays
9 in order to help the network defend against this ongoing DDoS.
11 o Major bugfixes (congestion control):
12 - Implement RFC3742 Limited Slow Start. Congestion control was
13 overshooting the congestion window during slow start, particularly
14 for onion service activity. With this fix, we now update the
15 congestion window more often during slow start, as well as dampen
16 the exponential growth when the congestion window grows above a
17 capping parameter. This should reduce the memory increases guard
18 relays were seeing, as well as allow us to set lower queue limits
19 to defend against ongoing DoS attacks. Fixes bug 40642; bugfix
22 o Major bugfixes (relay):
23 - Remove OR connections btrack subsystem entries when the connections
24 close normally. Before this, we would only remove the entry on error and
25 thus leaking memory for each normal OR connections. Fixes bug 40604;
26 bugfix on 0.4.0.1-alpha.
27 - Stop sending TRUNCATED cell and instead close the circuit from which we
28 received a DESTROY cell. This makes every relay in the circuit path to
29 stop queuing cells. Fixes bug 40623; bugfix on 0.1.0.2-rc.
31 o Major bugfixes (vanguards):
32 - We had omitted some checks for whether our vanguards (second layer
33 guards from proposal 333) overlapped. Now make sure to pick each
34 of them to be independent. Also, change the design to allow them
35 to come from the same family. Fixes bug 40639; bugfix
38 o Minor features (dirauth):
39 - Add a torrc option to control the Guard flag bandwidth threshold
40 percentile. Closes ticket 40652.
41 - Add an AuthDirVoteGuard torrc option that can allow authorities to
42 assign the Guard flag to the given fingerprints/country code/IPs.
43 This is a needed feature mostly for defense purposes in case a DoS
44 hits the network and relay start losing the Guard flags too fast.
45 - Make UPTIME_TO_GUARANTEE_STABLE, MTBF_TO_GUARANTEE_STABLE,
46 TIME_KNOWN_TO_GUARANTEE_FAMILIAR WFU_TO_GUARANTEE_GUARD tunable
49 o Minor features (fallbackdir):
50 - Regenerate fallback directories generated on August 11, 2022.
52 o Minor features (geoip data):
53 - Update the geoip files to match the IPFire Location Database, as
54 retrieved on 2022/08/11.
56 o Minor bugfixes (congestion control):
57 - Add a check for an integer underflow condition that might happen
58 in cases where the system clock is stopped, the ORconn is blocked,
59 and the endpoint sends more than a congestion window worth of non-
60 data control cells at once. This would cause a large congestion
61 window to be calculated instead of a small one. No security
62 impact. Fixes bug 40644; bugfix on 0.4.7.5-alpha.
64 o Minor bugfixes (defense in depth):
65 - Change a test in the netflow padding code to make it more
66 _obviously_ safe against remotely triggered crashes. (It was safe
67 against these before, but not obviously so.) Fixes bug 40645;
68 bugfix on 0.3.1.1-alpha.
70 o Minor bugfixes (relay):
71 - Do not propagate either forward or backward a DESTROY remote reason when
72 closing a circuit in order to avoid a possible side channel. Fixes bug
73 40649; bugfix on 0.1.2.4-alpha.
76 Changes in version 0.4.6.11 - 2022-08-11
77 This version contains two major fixes aimed at reducing memory pressure on
78 relays and possible side-channel. The rest of the fixes were backported for
79 stability or safety purposes.
81 This is the very LAST version of this series. As of August 1st 2022, it is
82 end-of-life (EOL). We thus strongly recommend to upgrade to the latest
83 stable of the 0.4.7.x series.
85 o Major bugfixes (relay):
86 - Remove OR connections btrack subsystem entries when the connections
87 close normally. Before this, we would only remove the entry on error and
88 thus leaking memory for each normal OR connections. Fixes bug 40604;
89 bugfix on 0.4.0.1-alpha.
90 - Stop sending TRUNCATED cell and instead close the circuit from which we
91 received a DESTROY cell. This makes every relay in the circuit path to
92 stop queuing cells. Fixes bug 40623; bugfix on 0.1.0.2-rc.
94 o Minor features (fallbackdir):
95 - Regenerate fallback directories generated on August 11, 2022.
97 o Minor features (geoip data):
98 - Update the geoip files to match the IPFire Location Database, as
99 retrieved on 2022/08/11.
101 o Minor features (linux seccomp2 sandbox):
102 - Permit the clone3 syscall, which is apparently used in glibc-2.34
103 and later. Closes ticket 40590.
105 o Minor bugfixes (controller, path bias):
106 - When a circuit's path is specified, in full or in part, from the
107 controller API, do not count that circuit towards our path-bias
108 calculations. (Doing so was incorrect, since we cannot tell
109 whether the controller is selecting relays randomly.) Resolves a
110 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
112 o Minor bugfixes (defense in depth):
113 - Change a test in the netflow padding code to make it more
114 _obviously_ safe against remotely triggered crashes. (It was safe
115 against these before, but not obviously so.) Fixes bug 40645;
116 bugfix on 0.3.1.1-alpha.
118 o Minor bugfixes (linux seccomp2 sandbox):
119 - Allow the rseq system call in the sandbox. This solves a crash
120 issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
121 40601; bugfix on 0.3.5.11.
123 o Minor bugfixes (metrics port, onion service):
124 - The MetricsPort line for an onion service with multiple ports are now
125 unique that is one line per port. Before this, all ports of an onion
126 service would be on the same line which violates the Prometheus rules of
127 unique labels. Fixes bug 40581; bugfix on 0.4.5.1-alpha.
129 o Minor bugfixes (onion service, client):
130 - Fix a fatal assert due to a guard subsystem recursion triggered by
131 the onion service client. Fixes bug 40579; bugfix on 0.3.5.1-alpha.
133 o Minor bugfixes (performance, DoS):
134 - Fix one case of a not-especially viable denial-of-service attack
135 found by OSS-Fuzz in our consensus-diff parsing code. This attack
136 causes a lot small of memory allocations and then immediately
137 frees them: this is only slow when running with all the sanitizers
138 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
140 o Minor bugfixes (relay):
141 - Do not propagate either forward or backward a DESTROY remote reason when
142 closing a circuit in order to avoid a possible side channel. Fixes bug
143 40649; bugfix on 0.1.2.4-alpha.
146 Changes in version 0.4.5.13 - 2022-08-11
147 This version contains two major fixes aimed at reducing memory pressure on
148 relays and possible side-channel. The rest of the fixes were backported for
149 stability or safety purposes. We strongly recommend to upgrade your relay to
150 this version or, ideally, to the latest stable of the 0.4.7.x series.
152 o Major bugfixes (relay):
153 - Remove OR connections btrack subsystem entries when the connections
154 close normally. Before this, we would only remove the entry on error and
155 thus leaking memory for each normal OR connections. Fixes bug 40604;
156 bugfix on 0.4.0.1-alpha.
157 - Stop sending TRUNCATED cell and instead close the circuit from which we
158 received a DESTROY cell. This makes every relay in the circuit path to
159 stop queuing cells. Fixes bug 40623; bugfix on 0.1.0.2-rc.
161 o Minor features (fallbackdir):
162 - Regenerate fallback directories generated on August 11, 2022.
164 o Minor features (geoip data):
165 - Update the geoip files to match the IPFire Location Database, as
166 retrieved on 2022/08/11.
168 o Minor features (linux seccomp2 sandbox):
169 - Permit the clone3 syscall, which is apparently used in glibc-2.34
170 and later. Closes ticket 40590.
172 o Minor bugfixes (controller, path bias):
173 - When a circuit's path is specified, in full or in part, from the
174 controller API, do not count that circuit towards our path-bias
175 calculations. (Doing so was incorrect, since we cannot tell
176 whether the controller is selecting relays randomly.) Resolves a
177 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
179 o Minor bugfixes (defense in depth):
180 - Change a test in the netflow padding code to make it more
181 _obviously_ safe against remotely triggered crashes. (It was safe
182 against these before, but not obviously so.) Fixes bug 40645;
183 bugfix on 0.3.1.1-alpha.
185 o Minor bugfixes (linux seccomp2 sandbox):
186 - Allow the rseq system call in the sandbox. This solves a crash
187 issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
188 40601; bugfix on 0.3.5.11.
190 o Minor bugfixes (metrics port, onion service):
191 - The MetricsPort line for an onion service with multiple ports are now
192 unique that is one line per port. Before this, all ports of an onion
193 service would be on the same line which violates the Prometheus rules of
194 unique labels. Fixes bug 40581; bugfix on 0.4.5.1-alpha.
196 o Minor bugfixes (onion service, client):
197 - Fix a fatal assert due to a guard subsystem recursion triggered by
198 the onion service client. Fixes bug 40579; bugfix on 0.3.5.1-alpha.
200 o Minor bugfixes (performance, DoS):
201 - Fix one case of a not-especially viable denial-of-service attack
202 found by OSS-Fuzz in our consensus-diff parsing code. This attack
203 causes a lot small of memory allocations and then immediately
204 frees them: this is only slow when running with all the sanitizers
205 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
207 o Minor bugfixes (relay):
208 - Do not propagate either forward or backward a DESTROY remote reason when
209 closing a circuit in order to avoid a possible side channel. Fixes bug
210 40649; bugfix on 0.1.2.4-alpha.
213 Changes in version 0.4.7.8 - 2022-06-17
214 This version fixes several bugfixes including a High severity security issue
215 categorized as a Denial of Service. Everyone running an earlier version
216 should upgrade to this version.
218 o Major bugfixes (congestion control, TROVE-2022-001):
219 - Fix a scenario where RTT estimation can become wedged, seriously
220 degrading congestion control performance on all circuits. This
221 impacts clients, onion services, and relays, and can be triggered
222 remotely by a malicious endpoint. Tracked as CVE-2022-33903. Fixes
223 bug 40626; bugfix on 0.4.7.5-alpha.
225 o Minor features (fallbackdir):
226 - Regenerate fallback directories generated on June 17, 2022.
228 o Minor features (geoip data):
229 - Update the geoip files to match the IPFire Location Database, as
230 retrieved on 2022/06/17.
232 o Minor bugfixes (linux seccomp2 sandbox):
233 - Allow the rseq system call in the sandbox. This solves a crash
234 issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
235 40601; bugfix on 0.3.5.11.
237 o Minor bugfixes (logging):
238 - Demote a harmless warn log message about finding a second hop to
239 from warn level to info level, if we do not have enough
240 descriptors yet. Leave it at notice level for other cases. Fixes
241 bug 40603; bugfix on 0.4.7.1-alpha.
242 - Demote a notice log message about "Unexpected path length" to info
243 level. These cases seem to happen arbitrarily, and we likely will
244 never find all of them before the switch to arti. Fixes bug 40612;
245 bugfix on 0.4.7.5-alpha.
247 o Minor bugfixes (relay, logging):
248 - Demote a harmless XOFF log message to from notice level to info
249 level. Fixes bug 40620; bugfix on 0.4.7.5-alpha.
252 Changes in version 0.4.7.7 - 2022-04-27
253 This is the first stable version of the 0.4.7.x series. This series includes
254 several major bugfixes from previous series and one massive new feature:
257 Congestion control should improve traffic speed and stability on the network
258 once a majority of Exit upgrade. You can find more details about it in
259 proposal 324 in the torspec.git repository.
261 For a complete list of changes since 0.4.6.10, see the ReleaseNotes file.
263 o Minor features (fallbackdir):
264 - Regenerate fallback directories generated on April 27, 2022.
266 o Minor features (geoip data):
267 - Update the geoip files to match the IPFire Location Database, as
268 retrieved on 2022/04/27.
270 o Minor bugfixes (congestion control, client side logs):
271 - Demote a warn about 1-hop circuits using congestion control down to
272 info; Demote the 4-hop case to notice. Fixes bug 40598; bugfix on
276 Changes in version 0.4.7.6-rc - 2022-04-07
277 This is the first release candidate of the 0.4.7.x series. Only one minor
278 bugfix went in since the last alpha couple weeks ago. We strongly recommend
279 anyone running an alpha version to upgrade to this version. Unless major
280 problems are found, the next release will finally be the stable!
282 o Minor features (fallbackdir):
283 - Regenerate fallback directories generated on April 07, 2022.
285 o Minor features (geoip data):
286 - Update the geoip files to match the IPFire Location Database, as
287 retrieved on 2022/04/07.
289 o Minor features (linux seccomp2 sandbox):
290 - Permit the clone3 syscall, which is apparently used in glibc-2.34
291 and later. Closes ticket 40590.
294 Changes in version 0.4.7.5-alpha - 2022-03-25
295 This version contains, of what we hope, the final work for congestion
296 control paving the way to the stable version. We expect this to be the last
297 alpha version of the 0.4.7.x series. Mostly minor bugfixes except one major
298 bugfix that changes how Tor behaves with DNS timeouts for Exit relays. As
299 always with an alpha, we recommend all relay operators to upgrade from
300 previous alpha to this one.
302 o Major bugfixes (onion service, congestion control):
303 - Fix the onion service upload case where the congestion control
304 parameters were not added to the right object. Fixes bug 40586;
305 bugfix on 0.4.7.4-alpha.
307 o Major bugfixes (relay, DNS):
308 - Lower the DNS timeout from 3 attempts at 5 seconds each to 2
309 attempts at 1 seconds each. Two new consensus parameters were
310 added to control these values. This change should improve observed
311 performance under DNS load; see ticket for more details. Fixes bug
312 40312; bugfix on 0.3.5.1-alpha.
314 o Minor features (control port):
315 - Provide congestion control fields on CIRC_BW and STREAM control
316 port events, for use by sbws. Closes ticket 40568.
318 o Minor features (fallbackdir):
319 - Regenerate fallback directories generated on March 25, 2022.
321 o Minor features (geoip data):
322 - Update the geoip files to match the IPFire Location Database, as
323 retrieved on 2022/03/25.
325 o Minor bugfixes (DNSPort, dormant mode):
326 - A request on the DNSPort now wakes up a dormant tor. Fixes bug
327 40577; bugfix on 0.3.5.1-alpha.
329 o Minor bugfixes (metrics port, onion service):
330 - Fix the metrics with a port label to be unique. Before this, all
331 ports of an onion service would be on the same line which violates
332 the Prometheus rules of unique labels. Fixes bug 40581; bugfix
335 o Minor bugfixes (onion service congestion control):
336 - Avoid a non-fatal assertion failure in the case where we fail to
337 set up congestion control on a rendezvous circuit. This could
338 happen naturally if a cache entry expired at an unexpected time.
339 Fixes bug 40576; bugfix on 0.4.7.4-alpha.
341 o Minor bugfixes (onion service, client):
342 - Fix a rare but fatal assertion failure due to a guard subsystem
343 recursion triggered by the onion service client. Fixes bug 40579;
344 bugfix on 0.3.5.1-alpha.
346 o Minor bugfixes (relay, overload):
347 - Decide whether to signal overload based on a fraction and
348 assessment period of ntor handshake drops. Previously, a single
349 drop could trigger an overload state, which caused many false
350 positives. Fixes bug 40560; bugfix on 0.4.7.1-alpha.
353 Changes in version 0.4.7.4-alpha - 2022-02-25
354 This version contains the negotiation congestion control work which is the
355 final part needed before going stable. There are also various bugfixes
356 including two major ones detailed below. Last, the Exit notice page layout
357 has been modernized but the text is unchanged. We recommend that all relay
358 operators running any previous alpha upgrade to this one.
360 o Major features (relay, client, onion services):
361 - Implement RTT-based congestion control for exits and onion
362 services, from Proposal 324. Disabled by default. Enabled by the
363 'cc_alg' consensus parameter. Closes ticket 40444.
365 o Major bugfixes (client):
366 - Stop caching TCP connect failures to relays/bridges when we
367 initiated the connection as a client. Now we only cache connect
368 failures as a relay or bridge when we initiated them because of an
369 EXTEND request. Declining to re-attempt the client-based
370 connections could cause problems when we lose connectivity and try
371 to reconnect. Fixes bug 40499; bugfix on 0.3.3.4-alpha.
373 o Major bugfixes (relay, overload):
374 - Do not trigger a general overload on DNS timeout. Even after
375 fixing 40527, some code remained that triggered the overload.
376 Fixes bug 40564; bugfix on 0.4.7.1-alpha.
378 o Minor feature (authority, relay):
379 - Reject End-Of-Life relays running version 0.3.5.x. Closes
382 o Minor features (fallbackdir):
383 - Regenerate fallback directories generated on February 25, 2022.
385 o Minor features (geoip data):
386 - Update the geoip files to match the IPFire Location Database, as
387 retrieved on 2022/02/25.
389 o Minor bugfix (logging):
390 - Update a log notice dead URL to a working one. Fixes bug 40544;
391 bugfix on 0.3.5.1-alpha.
393 o Minor bugfix (relay):
394 - Remove the HSDir and HSIntro onion service v2 protocol versions so
395 relay stop advertising that they support them. Fixes bug 40509;
398 o Minor bugfixes (cell scheduling):
399 - Avoid writing empty payload with NSS write.
400 - Don't attempt to write 0 bytes after a cell scheduling loop. No
401 empty payload was put on the wire. Fixes bug 40548; bugfix
404 o Minor bugfixes (compilation):
405 - Resume being able to build on old / esoteric gcc versions. Fixes
406 bug 40550; bugfix on 0.4.7.1-alpha.
408 o Minor bugfixes (compiler warnings):
409 - Fix couple compiler warnings on latest Ubuntu Jammy. Fixes bug
410 40516; bugfix on 0.3.5.1-alpha.
413 - Provide an improved version of the tor-exit-notice.html file for
414 exit relays to use as a landing page. The text is unchanged, but
415 the page design and layout are significantly modernized, and
416 several links are fixed. Patch from "n_user"; closes ticket 40529.
419 Changes in version 0.4.6.10 - 2022-02-04
420 This version contains minor bugfixes but one in particular is that relays
421 don't advertise onion service v2 support at the protocol version level.
423 o Minor features (fallbackdir):
424 - Regenerate fallback directories generated on February 04, 2022.
426 o Minor features (geoip data):
427 - Update the geoip files to match the IPFire Location Database, as
428 retrieved on 2022/02/04.
430 o Minor bugfix (logging):
431 - Update a log notice dead URL to a working one. Fixes bug 40544;
432 bugfix on 0.3.5.1-alpha.
434 o Minor bugfix (relay):
435 - Remove the HSDir and HSIntro onion service v2 protocol versions so
436 relay stop advertising that they support them. Fixes bug 40509;
439 o Minor bugfixes (MetricsPort, Prometheus):
440 - Add double quotes to the label values of the onion service
441 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
444 Changes in version 0.4.5.12 - 2022-02-04
445 This version contains mostly minor bugfixes for which you can find the
446 details below. The previous release (0.4.5.11) was suppose to update the
447 GeoIP and fallbackdir lists but a problem in our release pipeline prevented
448 those files to be updated correctly. Thus, this release regenerates up to
449 date lists. Furthermore, another fix to highlight is that relays don't
450 advertise onion service v2 support at the protocol version level.
452 o Minor feature (reproducible build):
453 - The repository can now build reproducible tarballs which adds the
454 build command "make dist-reprod" for that purpose. Closes
457 o Minor features (compilation):
458 - Give an error message if trying to build with a version of
459 LibreSSL known not to work with Tor. (There's an incompatibility
460 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
461 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
464 o Minor features (fallbackdir):
465 - Regenerate fallback directories generated on February 04, 2022.
467 o Minor features (geoip data):
468 - Update the geoip files to match the IPFire Location Database, as
469 retrieved on 2022/02/04.
471 o Minor bugfix (logging):
472 - Update a log notice dead URL to a working one. Fixes bug 40544;
473 bugfix on 0.3.5.1-alpha.
475 o Minor bugfix (relay):
476 - Remove the HSDir and HSIntro onion service v2 protocol versions so
477 relay stop advertising that they support them. Fixes bug 40509;
480 o Minor bugfixes (compilation):
481 - Fix a compilation error when trying to build Tor with a compiler
482 that does not support expanding statically initialized const
483 values in macro's. Fixes bug 40410; bugfix on 0.4.5.1-alpha
484 - Fix our configuration logic to detect whether we had OpenSSL 3:
485 previously, our logic was reversed. This has no other effect than
486 to change whether we suppress deprecated API warnings. Fixes bug
487 40429; bugfix on 0.3.5.13.
489 o Minor bugfixes (MetricsPort, Prometheus):
490 - Add double quotes to the label values of the onion service
491 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
493 o Minor bugfixes (relay):
494 - Reject IPv6-only DirPorts. Our reachability self-test forces
495 DirPorts to be IPv4, but our configuration parser allowed them to
496 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
497 bugfix on 0.4.5.1-alpha.
500 Changes in version 0.4.7.3-alpha - 2021-12-15
501 This third alpha release of the 0.4.7.x series fixes several bugs including
502 two major ones affecting Bridges and Relays (see below). If you are running
503 an earlier 0.4.7.x version, you should upgrade to this version.
505 o Major bugfixes (bridges):
506 - Make Tor work reliably again when you have multiple bridges
507 configured and one or more of them are unreachable. The problem
508 came because we require that we have bridge descriptors for both
509 of our first two bridges (else we refuse to try to connect), but
510 in some cases we would wait three hours before trying to fetch
511 these missing descriptors, and/or never recover when we do try to
512 fetch them. Fixes bugs 40396 and 40495; bugfix on 0.3.0.5-rc
515 o Major bugfixes (relay, overload):
516 - Change the MetricsPort DNS "timeout" label to be "tor_timeout" in
517 order to indicate that this was a DNS timeout from tor perspective
518 and not the DNS server itself.
519 - Deprecate overload_dns_timeout_period_secs and
520 overload_dns_timeout_scale_percent consensus parameters as well.
521 They were used to assess the overload state which is no more now.
522 - Don't make Tor DNS timeout trigger an overload general state.
523 These timeouts are different from DNS server timeout. They have to
524 be seen as timeout related to UX and not because of a network
525 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
527 o Minor feature (reproducible build):
528 - The repository can now build reproducible tarballs which adds the
529 build command "make dist-reprod" for that purpose. Closes
532 o Minor features (compilation):
533 - Give an error message if trying to build with a version of
534 LibreSSL known not to work with Tor. (There's an incompatibility
535 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
536 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
539 o Minor features (fallbackdir):
540 - Regenerate fallback directories generated on December 15, 2021.
542 o Minor features (geoip data):
543 - Update the geoip files to match the IPFire Location Database, as
544 retrieved on 2021/12/15.
546 o Minor features (portability):
547 - Try to prevent a compiler warning about printf arguments that
548 could sometimes occur on MSYS2 depending on the configuration.
551 o Minor bugfix (pluggable transport):
552 - Do not kill a managed proxy if one of its transport configurations
553 emits a method error. Instead log a warning and continue processing
554 method arguments. Fixes bug 7362; bugfix on 0.2.3.6-alpha.
556 o Minor bugfixes (bridges):
557 - When we don't yet have a descriptor for one of our bridges,
558 disable the entry guard retry schedule on that bridge. The entry
559 guard retry schedule and the bridge descriptor retry schedule can
560 conflict, e.g. where we mark a bridge as "maybe up" yet we don't
561 try to fetch its descriptor yet, leading Tor to wait (refusing to
562 do anything) until it becomes time to fetch the descriptor. Fixes
563 bug 40497; bugfix on 0.3.0.3-alpha.
565 o Minor bugfixes (compilation):
566 - Fix our configuration logic to detect whether we had OpenSSL 3:
567 previously, our logic was reversed. This has no other effect than
568 to change whether we suppress deprecated API warnings. Fixes bug
569 40429; bugfix on 0.3.5.13.
571 o Minor bugfixes (controller, path bias):
572 - When a circuit's path is specified, in full or in part, from the
573 controller API, do not count that circuit towards our path-bias
574 calculations. (Doing so was incorrect, since we cannot tell
575 whether the controller is selecting relays randomly.) Resolves a
576 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
578 o Minor bugfixes (logging):
579 - When we no longer have enough directory information to use the
580 network, we would log a notice-level message -- but we would not
581 reliably log a message when we recovered and resumed using the
582 network. Now make sure there is always a corresponding message
583 about recovering. Fixes bug 40496; bugfix on 0.3.5.1-alpha.
585 o Minor bugfixes (performance, DoS):
586 - Fix one case of a not-especially viable denial-of-service attack
587 found by OSS-Fuzz in our consensus-diff parsing code. This attack
588 causes a lot small of memory allocations and then immediately
589 frees them: this is only slow when running with all the sanitizers
590 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
592 o Minor bugfixes (relay):
593 - Reject IPv6-only DirPorts. Our reachability self-test forces
594 DirPorts to be IPv4, but our configuration parser allowed them to
595 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
596 bugfix on 0.4.5.1-alpha.
598 o Minor bugfixes (sandbox):
599 - Fix the sandbox on i386 by modifying it to allow the
600 "clock_gettime64" and "statx" system calls and to filter the
601 "chown32" and "stat64" system calls in place of "chown" and
602 "stat", respectively. Fixes bug 40505; bugfix on 0.2.5.4-alpha.
604 o Documentation (man, relay):
605 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
606 bugfix on 0.4.6.1-alpha.
609 Changes in version 0.4.6.9 - 2021-12-15
610 This version fixes several bugs from earlier versions of Tor. One important
611 piece is the removal of DNS timeout metric from the overload general signal.
612 See below for more details.
614 o Major bugfixes (relay, overload):
615 - Don't make Tor DNS timeout trigger an overload general state.
616 These timeouts are different from DNS server timeout. They have to
617 be seen as timeout related to UX and not because of a network
618 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
620 o Minor feature (reproducible build):
621 - The repository can now build reproducible tarballs which adds the
622 build command "make dist-reprod" for that purpose. Closes
625 o Minor features (compilation):
626 - Give an error message if trying to build with a version of
627 LibreSSL known not to work with Tor. (There's an incompatibility
628 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
629 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
632 o Minor features (fallbackdir):
633 - Regenerate fallback directories generated on December 15, 2021.
635 o Minor features (geoip data):
636 - Update the geoip files to match the IPFire Location Database, as
637 retrieved on 2021/12/15.
639 o Minor bugfixes (compilation):
640 - Fix our configuration logic to detect whether we had OpenSSL 3:
641 previously, our logic was reversed. This has no other effect than
642 to change whether we suppress deprecated API warnings. Fixes bug
643 40429; bugfix on 0.3.5.13.
645 o Minor bugfixes (relay):
646 - Reject IPv6-only DirPorts. Our reachability self-test forces
647 DirPorts to be IPv4, but our configuration parser allowed them to
648 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
649 bugfix on 0.4.5.1-alpha.
651 o Documentation (man, relay):
652 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
653 bugfix on 0.4.6.1-alpha.
656 Changes in version 0.4.7.2-alpha - 2021-10-26
657 This second alpha release of the 0.4.7.x series adds two major
658 features: congestion control (prop324) for network performance, and
659 the MiddleOnly flag (prop335) voted by the authorities to pin relays
660 to the middle position for various network health reasons. This
661 release also fixes numerous bugs.
663 The congestion control feature, detailed in proposal 324, still needs
664 more work before we can enable it by default. It is currently in its
665 testing and tuning phase which means that you should expect more
666 0.4.7.x alphas as congestion control gets stabilized and tuned for
667 optimal performance. And so, at this release, it can not be used
668 without a custom patch.
670 o Major features (congestion control):
671 - Implement support for flow control over congestion controlled
672 circuits. This work comes from proposal 324. Closes ticket 40450.
674 o Major features (directory authority):
675 - Add a new consensus method to handle MiddleOnly specially. When
676 enough authorities are using this method, then any relay tagged
677 with the MiddleOnly flag will have its Exit, Guard, HSDir, and
678 V2Dir flags automatically cleared, and will have its BadExit flag
679 automatically set. Implements part of proposal 335.
680 - Authorities can now be configured to label relays as "MiddleOnly".
681 When voting for this flag, authorities automatically vote against
682 Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
683 part of proposal 335. Based on a patch from Neel Chauhan.
685 o Major bugfix (relay, metrics):
686 - On the MetricsPort, the DNS error statistics are not reported by
687 record type ("record=...") anymore due to a libevent bug
688 (https://github.com/libevent/libevent/issues/1219). Fixes bug
689 40490; bugfix on 0.4.7.1-alpha.
691 o Major bugfixes (relay, overload state):
692 - Relays report the general overload state for DNS timeout errors
693 only if X% of all DNS queries over Y seconds are errors. Before
694 that, it only took 1 timeout to report the overload state which
695 was just too low of a threshold. The X and Y values are 1% and 10
696 minutes respectively but they are also controlled by consensus
697 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
699 o Minor feature (authority, relay):
700 - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
701 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
703 o Minor feature (onion service v2):
704 - Onion service v2 addresses are now not recognized anymore by tor
705 meaning a bad hostname is returned when attempting to pass it on a
706 SOCKS connection. No more deprecation log is emitted client side.
708 - See https://blog.torproject.org/v2-deprecation-timeline for
709 details on how to transition from v2 to v3.
711 o Minor features (fallbackdir):
712 - Regenerate fallback directories for October 2021. Closes
715 o Minor features (logging, heartbeat):
716 - When a relay receives a cell that isn't encrypted properly for it,
717 but the relay is the last hop on the circuit, the relay now counts
718 how many cells of this kind it receives, on how many circuits, and
719 reports this information in the log. Previously, we'd log each
720 cell at PROTOCOL_WARN level, which is far too verbose to be
721 useful. Fixes part of ticket 40400.
723 o Minor features (testing):
724 - We now have separate fuzzers for the inner layers of v3 onion
725 service descriptors, to prevent future bugs like 40392. Closes
728 o Minor bugfixes (compilation):
729 - Fix compilation error when __NR_time is not defined. Fixes bug
730 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
732 o Minor bugfixes (dirauth, bandwidth scanner):
733 - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
734 to avoid voting on bandwidth scanner weights to v3 directory
735 authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
738 o Minor bugfixes (fragile-hardening, sandbox):
739 - When building with --enable-fragile-hardening, add or relax Linux
740 seccomp rules to allow AddressSanitizer to execute normally if the
741 process terminates with the sandbox active. This has the side
742 effect of disabling the filtering of file- and directory-open
743 requests on most systems and dilutes the effectiveness of the
744 sandbox overall, as a wider range of system calls must be
745 permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
747 o Minor bugfixes (logging):
748 - If a channel has never received or transmitted a cell, or seen a
749 client, do not calculate time diffs against 1/1/1970 but log a
750 better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
752 o Minor bugfixes (onion service):
753 - Fix a warning BUG that would occur often on heavily loaded onion
754 service leading to filling the logs with useless warnings. Fixes
755 bug 34083; bugfix on 0.3.2.1-alpha.
757 o Minor bugfix (CI, onion service):
758 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
759 bugfix on 0.3.2.1-alpha.
761 o Minor bugfixes (onion service, config):
762 - Fix a memory leak for a small config line string that could occur
763 if the onion service failed to be configured from file properly.
764 Fixes bug 40484; bugfix on 0.3.2.1-alpha.
766 o Minor bugfixes (onion service, TROVE-2021-008):
767 - Only log v2 access attempts once total, in order to not pollute
768 the logs with warnings and to avoid recording the times on disk
769 when v2 access was attempted. Note that the onion address was
770 _never_ logged. This counts as a Low-severity security issue.
771 Fixes bug 40474; bugfix on 0.4.5.8.
772 - Note that due to #40476 which removes v2 support entirely, this
773 log line is not emitted anymore. We still mention this in the
774 changelog because it is a Low-severity TROVE.
776 o Minor bugfixes (usability):
777 - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
778 at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
779 happen naturally if a client gives up on a rendezvous circuit
780 after sending INTRODUCE1. Fixes part of bug 40400; bugfix
782 - Do not log "circuit_receive_relay_cell failed" at
783 LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
784 would want to log this as a protocol warning, we are already
785 logging another warning from inside circuit_receive_relay_cell.
786 Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
788 o Code simplification and refactoring:
789 - Lower the official maximum for "guard-extreme-restriction-percent"
790 to 100. This has no effect on when the guard code will generate a
791 warning, but it makes the intent of the option clearer. Fixes bug
792 40486; bugfix on 0.3.0.1-alpha.
795 - Add unit tests for the Linux seccomp sandbox. Resolves
798 o Code simplification and refactoring (rust):
799 - Remove Rust support and its associated code. It is unsupported and
800 Rust focus should be shifted to arti. Closes ticket 40469.
802 o Testing (CI, chutney):
803 - Bump the data size that chutney transmits to 5MBytes in order to
804 trigger the flow control and congestion window code. Closes
808 Changes in version 0.4.6.8 - 2021-10-26
809 This version fixes several bugs from earlier versions of Tor. One
810 highlight is a fix on how we track DNS timeouts to report general
813 o Major bugfixes (relay, overload state):
814 - Relays report the general overload state for DNS timeout errors
815 only if X% of all DNS queries over Y seconds are errors. Before
816 that, it only took 1 timeout to report the overload state which
817 was just too low of a threshold. The X and Y values are 1% and 10
818 minutes respectively but they are also controlled by consensus
819 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
821 o Minor features (fallbackdir):
822 - Regenerate fallback directories for October 2021. Closes
825 o Minor features (testing):
826 - On a testing network, relays can now use the
827 TestingMinTimeToReportBandwidth option to change the smallest
828 amount of time over which they're willing to report their observed
829 maximum bandwidth. Previously, this was fixed at 1 day. For
830 safety, values under 2 hours are only supported on testing
831 networks. Part of a fix for ticket 40337.
832 - Relays on testing networks no longer rate-limit how frequently
833 they are willing to report new bandwidth measurements. Part of a
834 fix for ticket 40337.
835 - Relays on testing networks now report their observed bandwidths
836 immediately from startup. Previously, they waited until they had
837 been running for a full day. Closes ticket 40337.
839 o Minor bugfix (onion service):
840 - Do not flag an HSDir as non-running in case the descriptor upload
841 or fetch fails. An onion service closes pending directory
842 connections before uploading a new descriptor which can thus lead
843 to wrongly flagging many relays and thus affecting circuit building
844 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
845 - Improve logging when a bad HS version is given. Fixes bug 40476;
846 bugfix on 0.4.6.1-alpha.
848 o Minor bugfix (CI, onion service):
849 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
850 bugfix on 0.3.2.1-alpha.
852 o Minor bugfixes (compatibility):
853 - Fix compatibility with the most recent Libevent versions, which no
854 longer have an evdns_set_random_bytes() function. Because this
855 function has been a no-op since Libevent 2.0.4-alpha, it is safe
856 for us to just stop calling it. Fixes bug 40371; bugfix
859 o Minor bugfixes (onion service, TROVE-2021-008):
860 - Only log v2 access attempts once total, in order to not pollute
861 the logs with warnings and to avoid recording the times on disk
862 when v2 access was attempted. Note that the onion address was
863 _never_ logged. This counts as a Low-severity security issue.
864 Fixes bug 40474; bugfix on 0.4.5.8.
867 Changes in version 0.4.5.11 - 2021-10-26
868 The major change in this version is that v2 onion services are now
869 disabled at the client, service, and relay: any Tor nodes running this
870 version and onward will stop supporting v2 onion services. This is the
871 last step in the long deprecation process of v2 onion services.
872 Everyone running an earlier version, whether as a client, a relay, or
873 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
876 o Major feature (onion service v2):
877 - See https://blog.torproject.org/v2-deprecation-timeline for
878 details on how to transition from v2 to v3.
879 - The control port commands HSFETCH and HSPOST no longer allow
880 version 2, and it is no longer possible to create a v2 service
882 - Tor no longer allows creating v2 services, or connecting as a
883 client to a v2 service. Relays will decline to be a v2 HSDir or
884 introduction point. This effectively disables onion service
885 version 2 Tor-wide. Closes ticket 40476.
887 o Minor features (bridge, backport from 0.4.6.8):
888 - We now announce the URL to Tor's new bridge status at
889 https://bridges.torproject.org/ when Tor is configured to run as a
890 bridge relay. Closes ticket 30477.
892 o Minor features (fallbackdir):
893 - Regenerate fallback directories for October 2021. Closes
896 o Minor features (logging, diagnostic, backport from 0.4.6.5):
897 - Log decompression failures at a higher severity level, since they
898 can help provide missing context for other warning messages. We
899 rate-limit these messages, to avoid flooding the logs if they
900 begin to occur frequently. Closes ticket 40175.
902 o Minor features (testing, backport from 0.4.6.8):
903 - On a testing network, relays can now use the
904 TestingMinTimeToReportBandwidth option to change the smallest
905 amount of time over which they're willing to report their observed
906 maximum bandwidth. Previously, this was fixed at 1 day. For
907 safety, values under 2 hours are only supported on testing
908 networks. Part of a fix for ticket 40337.
909 - Relays on testing networks no longer rate-limit how frequently
910 they are willing to report new bandwidth measurements. Part of a
911 fix for ticket 40337.
912 - Relays on testing networks now report their observed bandwidths
913 immediately from startup. Previously, they waited until they had
914 been running for a full day. Closes ticket 40337.
916 o Minor bugfix (CI, onion service):
917 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
918 bugfix on 0.3.2.1-alpha.
920 o Minor bugfix (onion service, backport from 0.4.6.8):
921 - Do not flag an HSDir as non-running in case the descriptor upload
922 or fetch fails. An onion service closes pending directory
923 connections before uploading a new descriptor which can thus lead
924 to wrongly flagging many relays and thus affecting circuit building
925 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
927 o Minor bugfixes (compatibility, backport from 0.4.6.8):
928 - Fix compatibility with the most recent Libevent versions, which no
929 longer have an evdns_set_random_bytes() function. Because this
930 function has been a no-op since Libevent 2.0.4-alpha, it is safe
931 for us to just stop calling it. Fixes bug 40371; bugfix
934 o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
935 - Avoid a set of bugs that could be caused by inconsistently
936 preferring an out-of-date consensus stored in a stale directory
937 cache over a more recent one stored on disk as the latest
938 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
940 o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
941 - Only log v2 access attempts once total, in order to not pollute
942 the logs with warnings and to avoid recording the times on disk
943 when v2 access was attempted. Note that the onion address was
944 _never_ logged. This counts as a Low-severity security issue.
945 Fixes bug 40474; bugfix on 0.4.5.8.
948 Changes in version 0.3.5.17 - 2021-10-26
949 The major change in this version is that v2 onion services are now
950 disabled at the client, service, and relay: any Tor nodes running this
951 version and onward will stop supporting v2 onion services. This is the
952 last step in the long deprecation process of v2 onion services.
953 Everyone running an earlier version, whether as a client, a relay, or
954 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
957 o Major feature (onion service v2, backport from 0.4.5.11):
958 - See https://blog.torproject.org/v2-deprecation-timeline for
959 details on how to transition from v2 to v3.
960 - The control port commands HSFETCH and HSPOST no longer allow
961 version 2, and it is no longer possible to create a v2 service
963 - Tor no longer allows creating v2 services, or connecting as a
964 client to a v2 service. Relays will decline to be a v2 HSDir or
965 introduction point. This effectively disables onion service
966 version 2 Tor-wide. Closes ticket 40476.
968 o Minor features (bridge, backport from 0.4.6.8):
969 - We now announce the URL to Tor's new bridge status at
970 https://bridges.torproject.org/ when Tor is configured to run as a
971 bridge relay. Closes ticket 30477.
973 o Minor features (fallbackdir):
974 - Regenerate fallback directories for October 2021. Closes
977 o Minor bugfixes (compatibility, backport from 0.4.6.8):
978 - Fix compatibility with the most recent Libevent versions, which no
979 longer have an evdns_set_random_bytes() function. Because this
980 function has been a no-op since Libevent 2.0.4-alpha, it is safe
981 for us to just stop calling it. Fixes bug 40371; bugfix
985 Changes in version 0.4.7.1-alpha - 2021-09-17
986 This version is the first alpha release of the 0.4.7.x series. One
987 major feature is Vanguards Lite, from proposal 333, to help mitigate
988 guard discovery attacks against onion services. It also includes
991 o Major features (Proposal 332, onion services, guard selection algorithm):
992 - Clients and onion services now choose four long-lived "layer 2"
993 guard relays for use as the middle hop in all onion circuits.
994 These relays are kept in place for a randomized duration averaging
995 1 week. This mitigates guard discovery attacks against clients and
996 short-lived onion services such as OnionShare. Long-lived onion
997 services that need high security should still use the Vanguards
998 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
999 40363; implements proposal 333.
1001 o Minor features (bridge testing support):
1002 - Let external bridge reachability testing tools discard cached
1003 bridge descriptors when setting new bridges, so they can be sure
1004 to get a clean reachability test. Implements ticket 40209.
1006 o Minor features (fuzzing):
1007 - When building with --enable-libfuzzer, use a set of compiler flags
1008 that works with more recent versions of the library. Previously we
1009 were using a set of flags from 2017. Closes ticket 40407.
1011 o Minor features (testing configuration):
1012 - When TestingTorNetwork is enabled, skip the permissions check on
1013 hidden service directories. Closes ticket 40338.
1014 - On a testing network, relays can now use the
1015 TestingMinTimeToReportBandwidth option to change the smallest
1016 amount of time over which they're willing to report their observed
1017 maximum bandwidth. Previously, this was fixed at 1 day. For
1018 safety, values under 2 hours are only supported on testing
1019 networks. Part of a fix for ticket 40337.
1020 - Relays on testing networks no longer rate-limit how frequently
1021 they are willing to report new bandwidth measurements. Part of a
1022 fix for ticket 40337.
1023 - Relays on testing networks now report their observed bandwidths
1024 immediately from startup. Previously, they waited until they had
1025 been running for a full day. Closes ticket 40337.
1027 o Minor bugfixes (circuit padding):
1028 - Don't send STOP circuit padding cells when the other side has
1029 already shut down the corresponding padding machine. Fixes bug
1030 40435; bugfix on 0.4.0.1-alpha.
1032 o Minor bugfixes (compatibility):
1033 - Fix compatibility with the most recent Libevent versions, which no
1034 longer have an evdns_set_random_bytes() function. Because this
1035 function has been a no-op since Libevent 2.0.4-alpha, it is safe
1036 for us to just stop calling it. Fixes bug 40371; bugfix
1039 o Minor bugfixes (control, sandbox):
1040 - Allows the control command SAVECONF to succeed when the seccomp
1041 sandbox is enabled. Makes SAVECONF keep only one backup file, to
1042 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
1043 Patch by Daniel Pinto.
1045 o Minor bugfixes (heartbeat):
1046 - Adjust the heartbeat log message about distinct clients to
1047 consider the HeartbeatPeriod rather than a flat 6-hour delay.
1048 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
1050 o Minor bugfixes (logging, relay):
1051 - Add spaces between the "and" when logging the "Your server has not
1052 managed to confirm reachability for its" on dual-stack relays.
1053 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
1055 o Minor bugfixes (onion service):
1056 - Do not flag an HSDir as non-running in case the descriptor upload
1057 or fetch fails. An onion service closes pending directory
1058 connections before uploading a new descriptor which leads to
1059 wrongly flagging many relays and thus affecting circuit path
1060 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
1062 o Minor bugfixes (statistics):
1063 - Fix a fencepost issue when we check stability_last_downrated where
1064 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
1065 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
1067 o Minor bugfixes (tests):
1068 - Fix a bug that prevented some tests from running with the correct
1069 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
1072 - Add links to original tor design paper and anonbib to
1073 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
1075 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
1076 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
1079 Changes in version 0.4.6.7 - 2021-08-16
1080 This version fixes several bugs from earlier versions of Tor,
1081 including one that could lead to a denial-of-service attack. Everyone
1082 running an earlier version, whether as a client, a relay, or an onion
1083 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
1085 o Major bugfixes (cryptography, security):
1086 - Resolve an assertion failure caused by a behavior mismatch between
1087 our batch-signature verification code and our single-signature
1088 verification code. This assertion failure could be triggered
1089 remotely, leading to a denial of service attack. We fix this issue
1090 by disabling batch verification. Fixes bug 40078; bugfix on
1091 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
1092 CVE-2021-38385. Found by Henry de Valence.
1094 o Minor feature (fallbackdir):
1095 - Regenerate fallback directories list. Close ticket 40447.
1097 o Minor features (geoip data):
1098 - Update the geoip files to match the IPFire Location Database, as
1099 retrieved on 2021/08/12.
1101 o Minor bugfix (crypto):
1102 - Disable the unused batch verification feature of ed25519-donna.
1103 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
1106 o Minor bugfixes (onion service):
1107 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
1108 Address) for a v2 onion address. Fixes bug 40421; bugfix
1111 o Minor bugfixes (relay):
1112 - Reduce the compression level for data streaming from HIGH to LOW
1113 in order to reduce CPU load on the directory relays. Fixes bug
1114 40301; bugfix on 0.3.5.1-alpha.
1116 o Minor bugfixes (timekeeping):
1117 - Calculate the time of day correctly on systems where the time_t
1118 type includes leap seconds. (This is not the case on most
1119 operating systems, but on those where it occurs, our tor_timegm
1120 function did not correctly invert the system's gmtime function,
1121 which could result in assertion failures when calculating voting
1122 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
1125 Changes in version 0.4.5.10 - 2021-08-16
1126 This version fixes several bugs from earlier versions of Tor,
1127 including one that could lead to a denial-of-service attack. Everyone
1128 running an earlier version, whether as a client, a relay, or an onion
1129 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
1131 o Major bugfixes (cryptography, security):
1132 - Resolve an assertion failure caused by a behavior mismatch between
1133 our batch-signature verification code and our single-signature
1134 verification code. This assertion failure could be triggered
1135 remotely, leading to a denial of service attack. We fix this issue
1136 by disabling batch verification. Fixes bug 40078; bugfix on
1137 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
1138 CVE-2021-38385. Found by Henry de Valence.
1140 o Minor feature (fallbackdir):
1141 - Regenerate fallback directories list. Close ticket 40447.
1143 o Minor features (geoip data):
1144 - Update the geoip files to match the IPFire Location Database, as
1145 retrieved on 2021/08/12.
1147 o Minor features (testing):
1148 - Enable the deterministic RNG for unit tests that covers the
1149 address set bloomfilter-based API's. Fixes bug 40419; bugfix
1152 o Minor bugfix (crypto, backport from 0.4.6.7):
1153 - Disable the unused batch verification feature of ed25519-donna.
1154 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
1157 o Minor bugfixes (relay, backport from 0.4.6.7):
1158 - Reduce the compression level for data streaming from HIGH to LOW.
1159 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1161 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
1162 - Calculate the time of day correctly on systems where the time_t
1163 type includes leap seconds. (This is not the case on most
1164 operating systems, but on those where it occurs, our tor_timegm
1165 function did not correctly invert the system's gmtime function,
1166 which could result in assertion failures when calculating voting
1167 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
1169 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
1170 - Suppress a strict-prototype warning when building with some
1171 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
1174 Changes in version 0.3.5.16 - 2021-08-16
1175 This version fixes several bugs from earlier versions of Tor,
1176 including one that could lead to a denial-of-service attack. Everyone
1177 running an earlier version, whether as a client, a relay, or an onion
1178 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
1180 o Major bugfixes (cryptography, security):
1181 - Resolve an assertion failure caused by a behavior mismatch between
1182 our batch-signature verification code and our single-signature
1183 verification code. This assertion failure could be triggered
1184 remotely, leading to a denial of service attack. We fix this issue
1185 by disabling batch verification. Fixes bug 40078; bugfix on
1186 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
1187 CVE-2021-38385. Found by Henry de Valence.
1189 o Minor feature (fallbackdir):
1190 - Regenerate fallback directories list. Close ticket 40447.
1192 o Minor features (geoip data):
1193 - Update the geoip files to match the IPFire Location Database, as
1194 retrieved on 2021/08/12.
1196 o Minor bugfix (crypto, backport from 0.4.6.7):
1197 - Disable the unused batch verification feature of ed25519-donna.
1198 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
1201 o Minor bugfixes (relay, backport from 0.4.6.7):
1202 - Reduce the compression level for data streaming from HIGH to LOW.
1203 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1206 Changes in version 0.4.6.6 - 2021-06-30
1207 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
1208 allows Tor to build correctly on older versions of GCC. You should
1209 upgrade to this version if you were having trouble building Tor
1210 0.4.6.5; otherwise, there is probably no need.
1212 o Minor bugfixes (compilation):
1213 - Fix a compilation error when trying to build Tor with a compiler
1214 that does not support const variables in static initializers.
1215 Fixes bug 40410; bugfix on 0.4.6.5.
1216 - Suppress a strict-prototype warning when building with some
1217 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
1219 o Minor bugfixes (testing):
1220 - Enable the deterministic RNG for unit tests that covers the
1221 address set bloomfilter-based API's. Fixes bug 40419; bugfix
1225 Changes in version 0.4.5.9 - 2021-06-14
1226 Tor 0.4.5.9 fixes several security issues, including a
1227 denial-of-service attack against onion service clients, and another
1228 denial-of-service attack against relays. Everybody should upgrade to
1229 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1231 o Major bugfixes (security, backport from 0.4.6.5):
1232 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1233 half-closed streams. Previously, clients failed to validate which
1234 hop sent these cells: this would allow a relay on a circuit to end
1235 a stream that wasn't actually built with it. Fixes bug 40389;
1236 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1237 003 and CVE-2021-34548.
1239 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1240 - Detect more failure conditions from the OpenSSL RNG code.
1241 Previously, we would detect errors from a missing RNG
1242 implementation, but not failures from the RNG code itself.
1243 Fortunately, it appears those failures do not happen in practice
1244 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1245 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1246 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1248 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1249 - Resist a hashtable-based CPU denial-of-service attack against
1250 relays. Previously we used a naive unkeyed hash function to look
1251 up circuits in a circuitmux object. An attacker could exploit this
1252 to construct circuits with chosen circuit IDs, to create
1253 collisions and make the hash table inefficient. Now we use a
1254 SipHash construction here instead. Fixes bug 40391; bugfix on
1255 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1256 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1257 - Fix an out-of-bounds memory access in v3 onion service descriptor
1258 parsing. An attacker could exploit this bug by crafting an onion
1259 service descriptor that would crash any client that tried to visit
1260 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1261 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1262 Glazunov from Google's Project Zero.
1264 o Minor features (compatibility, backport from 0.4.6.4-rc):
1265 - Remove an assertion function related to TLS renegotiation. It was
1266 used nowhere outside the unit tests, and it was breaking
1267 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1270 o Minor features (geoip data):
1271 - Update the geoip files to match the IPFire Location Database, as
1272 retrieved on 2021/06/10.
1274 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
1275 - Allow the control command SAVECONF to succeed when the seccomp
1276 sandbox is enabled, and make SAVECONF keep only one backup file to
1277 simplify implementation. Previously SAVECONF allowed a large
1278 number of backup files, which made it incompatible with the
1279 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
1282 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
1283 - Fix a bug that made tor try to re-bind() on an already open
1284 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
1288 Changes in version 0.4.4.9 - 2021-06-14
1289 Tor 0.4.4.9 fixes several security issues, including a
1290 denial-of-service attack against onion service clients, and another
1291 denial-of-service attack against relays. Everybody should upgrade to
1292 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1294 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
1295 June 15. This is therefore the last release in its series. Everybody
1296 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
1298 o Major bugfixes (security, backport from 0.4.6.5):
1299 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1300 half-closed streams. Previously, clients failed to validate which
1301 hop sent these cells: this would allow a relay on a circuit to end
1302 a stream that wasn't actually built with it. Fixes bug 40389;
1303 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1304 003 and CVE-2021-34548.
1306 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1307 - Detect more failure conditions from the OpenSSL RNG code.
1308 Previously, we would detect errors from a missing RNG
1309 implementation, but not failures from the RNG code itself.
1310 Fortunately, it appears those failures do not happen in practice
1311 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1312 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1313 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1315 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1316 - Resist a hashtable-based CPU denial-of-service attack against
1317 relays. Previously we used a naive unkeyed hash function to look
1318 up circuits in a circuitmux object. An attacker could exploit this
1319 to construct circuits with chosen circuit IDs, to create
1320 collisions and make the hash table inefficient. Now we use a
1321 SipHash construction here instead. Fixes bug 40391; bugfix on
1322 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1323 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1324 - Fix an out-of-bounds memory access in v3 onion service descriptor
1325 parsing. An attacker could exploit this bug by crafting an onion
1326 service descriptor that would crash any client that tried to visit
1327 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1328 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1329 Glazunov from Google's Project Zero.
1331 o Minor features (compatibility, backport from 0.4.6.4-rc):
1332 - Remove an assertion function related to TLS renegotiation. It was
1333 used nowhere outside the unit tests, and it was breaking
1334 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1337 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1338 - Regenerate the list of fallback directories to contain a new set
1339 of 200 relays. Closes ticket 40265.
1341 o Minor features (geoip data):
1342 - Update the geoip files to match the IPFire Location Database, as
1343 retrieved on 2021/06/10.
1345 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1346 - Fix a non-fatal BUG() message due to a too-early free of a string,
1347 when listing a client connection from the DoS defenses subsystem.
1348 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1350 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1351 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1352 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1355 Changes in version 0.3.5.15 - 2021-06-14
1356 Tor 0.3.5.15 fixes several security issues, including a
1357 denial-of-service attack against onion service clients, and another
1358 denial-of-service attack against relays. Everybody should upgrade to
1359 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1361 o Major bugfixes (security, backport from 0.4.6.5):
1362 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1363 half-closed streams. Previously, clients failed to validate which
1364 hop sent these cells: this would allow a relay on a circuit to end
1365 a stream that wasn't actually built with it. Fixes bug 40389;
1366 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1367 003 and CVE-2021-34548.
1369 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1370 - Detect more failure conditions from the OpenSSL RNG code.
1371 Previously, we would detect errors from a missing RNG
1372 implementation, but not failures from the RNG code itself.
1373 Fortunately, it appears those failures do not happen in practice
1374 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1375 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1376 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1378 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1379 - Resist a hashtable-based CPU denial-of-service attack against
1380 relays. Previously we used a naive unkeyed hash function to look
1381 up circuits in a circuitmux object. An attacker could exploit this
1382 to construct circuits with chosen circuit IDs, to create
1383 collisions and make the hash table inefficient. Now we use a
1384 SipHash construction here instead. Fixes bug 40391; bugfix on
1385 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1386 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1387 - Fix an out-of-bounds memory access in v3 onion service descriptor
1388 parsing. An attacker could exploit this bug by crafting an onion
1389 service descriptor that would crash any client that tried to visit
1390 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1391 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1392 Glazunov from Google's Project Zero.
1394 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1395 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1396 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1398 o Minor features (compatibility, backport from 0.4.6.4-rc):
1399 - Remove an assertion function related to TLS renegotiation. It was
1400 used nowhere outside the unit tests, and it was breaking
1401 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1404 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1405 - Regenerate the list of fallback directories to contain a new set
1406 of 200 relays. Closes ticket 40265.
1408 o Minor features (geoip data):
1409 - Update the geoip files to match the IPFire Location Database, as
1410 retrieved on 2021/06/10.
1413 Changes in version 0.4.6.5 - 2021-06-14
1414 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
1415 series includes numerous features and bugfixes, including a significant
1416 improvement to our circuit timeout algorithm that should improve
1417 observed client performance, and a way for relays to report when they are
1420 This release also includes security fixes for several security issues,
1421 including a denial-of-service attack against onion service clients,
1422 and another denial-of-service attack against relays. Everybody should
1423 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1425 Below are the changes since 0.4.6.4-rc. For a complete list of changes
1426 since 0.4.5.8, see the ReleaseNotes file.
1428 o Major bugfixes (security):
1429 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1430 half-closed streams. Previously, clients failed to validate which
1431 hop sent these cells: this would allow a relay on a circuit to end
1432 a stream that wasn't actually built with it. Fixes bug 40389;
1433 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1434 003 and CVE-2021-34548.
1436 o Major bugfixes (security, defense-in-depth):
1437 - Detect more failure conditions from the OpenSSL RNG code.
1438 Previously, we would detect errors from a missing RNG
1439 implementation, but not failures from the RNG code itself.
1440 Fortunately, it appears those failures do not happen in practice
1441 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1442 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1443 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1445 o Major bugfixes (security, denial of service):
1446 - Resist a hashtable-based CPU denial-of-service attack against
1447 relays. Previously we used a naive unkeyed hash function to look
1448 up circuits in a circuitmux object. An attacker could exploit this
1449 to construct circuits with chosen circuit IDs, to create
1450 collisions and make the hash table inefficient. Now we use a
1451 SipHash construction here instead. Fixes bug 40391; bugfix on
1452 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1453 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1454 - Fix an out-of-bounds memory access in v3 onion service descriptor
1455 parsing. An attacker could exploit this bug by crafting an onion
1456 service descriptor that would crash any client that tried to visit
1457 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1458 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1459 Glazunov from Google's Project Zero.
1461 o Minor features (geoip data):
1462 - Update the geoip files to match the IPFire Location Database, as
1463 retrieved on 2021/06/10.
1465 o Minor features (logging, diagnostic):
1466 - Log decompression failures at a higher severity level, since they
1467 can help provide missing context for other warning messages. We
1468 rate-limit these messages, to avoid flooding the logs if they
1469 begin to occur frequently. Closes ticket 40175.
1472 Changes in version 0.4.6.4-rc - 2021-05-28
1473 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
1474 the final release candidate in its series: unless major new issues are
1475 found, the next release will be stable.
1477 o Minor features (compatibility):
1478 - Remove an assertion function related to TLS renegotiation. It was
1479 used nowhere outside the unit tests, and it was breaking
1480 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1483 o Minor bugfixes (consensus handling):
1484 - Avoid a set of bugs that could be caused by inconsistently
1485 preferring an out-of-date consensus stored in a stale directory
1486 cache over a more recent one stored on disk as the latest
1487 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
1489 o Minor bugfixes (control, sandbox):
1490 - Allow the control command SAVECONF to succeed when the seccomp
1491 sandbox is enabled, and make SAVECONF keep only one backup file to
1492 simplify implementation. Previously SAVECONF allowed a large
1493 number of backup files, which made it incompatible with the
1494 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
1497 o Minor bugfixes (metrics port):
1498 - Fix a bug that made tor try to re-bind() on an already open
1499 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
1503 - Remove unneeded code for parsing private keys in directory
1504 documents. This code was only used for client authentication in v2
1505 onion services, which are now unsupported. Closes ticket 40374.
1508 Changes in version 0.4.5.8 - 2021-05-10
1509 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
1510 from the 0.4.6.x series.
1512 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
1513 - Add a workaround to enable the Linux sandbox to work correctly
1514 with Glibc 2.33. This version of Glibc has started using the
1515 fstatat() system call, which previously our sandbox did not allow.
1516 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1518 o Minor features (compilation, backport from 0.4.6.3-rc):
1519 - Make the autoconf script build correctly with autoconf versions
1520 2.70 and later. Closes part of ticket 40335.
1522 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1523 - Regenerate the list of fallback directories to contain a new set
1524 of 200 relays. Closes ticket 40265.
1526 o Minor features (geoip data):
1527 - Update the geoip files to match the IPFire Location Database, as
1528 retrieved on 2021/05/07.
1530 o Minor features (onion services):
1531 - Add warning message when connecting to now deprecated v2 onion
1532 services. As announced, Tor 0.4.5.x is the last series that will
1533 support v2 onions. Closes ticket 40373.
1535 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
1536 - Fix a regression that made it impossible start Tor using a bridge
1537 line with a transport name and no fingerprint. Fixes bug 40360;
1538 bugfix on 0.4.5.4-rc.
1540 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
1541 - Allow a custom "ar" for cross-compilation. Our previous build
1542 script had used the $AR environment variable in most places, but
1543 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1545 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1546 - Fix a non-fatal BUG() message due to a too-early free of a string,
1547 when listing a client connection from the DoS defenses subsystem.
1548 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1550 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1551 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1552 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1554 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
1555 - Fix a "BUG" warning that would appear when a controller chooses
1556 the first hop for a circuit, and that circuit completes. Fixes bug
1557 40285; bugfix on 0.3.2.1-alpha.
1559 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
1560 - Fix a bug where an expired cached descriptor could get overwritten
1561 with a new one without freeing it, leading to a memory leak. Fixes
1562 bug 40356; bugfix on 0.3.5.1-alpha.
1564 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
1565 - Fix pattern-matching errors when patterns expand to invalid paths
1566 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1570 Changes in version 0.4.6.3-rc - 2021-05-10
1571 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
1572 a few small bugs from previous versions, and adds a better error
1573 message when trying to use (no longer supported) v2 onion services.
1575 Though we anticipate that we'll be doing a bit more clean-up between
1576 now and the stable release, we expect that our remaining changes will
1577 be fairly simple. There will likely be at least one more release
1578 candidate before 0.4.6.x is stable.
1580 o Major bugfixes (onion service, control port):
1581 - Make the ADD_ONION command properly configure client authorization.
1582 Before this fix, the created onion failed to add the client(s).
1583 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
1585 o Minor features (compatibility, Linux seccomp sandbox):
1586 - Add a workaround to enable the Linux sandbox to work correctly
1587 with Glibc 2.33. This version of Glibc has started using the
1588 fstatat() system call, which previously our sandbox did not allow.
1589 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1591 o Minor features (compilation):
1592 - Make the autoconf script build correctly with autoconf versions
1593 2.70 and later. Closes part of ticket 40335.
1595 o Minor features (geoip data):
1596 - Update the geoip files to match the IPFire Location Database, as
1597 retrieved on 2021/05/07.
1599 o Minor features (onion services):
1600 - Add a warning message when trying to connect to (no longer
1601 supported) v2 onion services. Closes ticket 40373.
1603 o Minor bugfixes (build, cross-compilation):
1604 - Allow a custom "ar" for cross-compilation. Our previous build
1605 script had used the $AR environment variable in most places, but
1606 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1608 o Minor bugfixes (compiler warnings):
1609 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1610 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1612 o Minor bugfixes (logging, relay):
1613 - Emit a warning if an Address is found to be internal and tor can't
1614 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
1616 o Minor bugfixes (onion service, client, memory leak):
1617 - Fix a bug where an expired cached descriptor could get overwritten
1618 with a new one without freeing it, leading to a memory leak. Fixes
1619 bug 40356; bugfix on 0.3.5.1-alpha.
1622 Changes in version 0.4.6.2-alpha - 2021-04-15
1623 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
1624 small bugs in previous releases, and solves other issues that had
1625 enabled denial-of-service attacks and affected integration with
1628 o Minor features (client):
1629 - Clients now check whether their streams are attempting to re-enter
1630 the Tor network (i.e. to send Tor traffic over Tor), and close
1631 them preemptively if they think exit relays will refuse them for
1632 this reason. See ticket 2667 for details. Closes ticket 40271.
1634 o Minor features (command line):
1635 - Add long format name "--torrc-file" equivalent to the existing
1636 command-line option "-f". Closes ticket 40324. Patch by
1639 o Minor features (dormant mode):
1640 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
1641 control over whether the client ever becomes dormant from
1642 inactivity. Most people won't need this. Closes ticket 40228.
1644 o Minor features (fallback directory list):
1645 - Regenerate the list of fallback directories to contain a new set
1646 of 200 relays. Closes ticket 40265.
1648 o Minor features (geoip data):
1649 - Update the geoip files to match the IPFire Location Database, as
1650 retrieved on 2021/04/13.
1652 o Minor features (logging):
1653 - Edit heartbeat log messages so that more of them begin with the
1654 string "Heartbeat: ". Closes ticket 40322; patch
1657 o Minor bugfixes (bridge, pluggable transport):
1658 - Fix a regression that made it impossible start Tor using a bridge
1659 line with a transport name and no fingerprint. Fixes bug 40360;
1660 bugfix on 0.4.5.4-rc.
1662 o Minor bugfixes (channel, DoS):
1663 - Fix a non-fatal BUG() message due to a too-early free of a string,
1664 when listing a client connection from the DoS defenses subsystem.
1665 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1667 o Minor bugfixes (compilation):
1668 - Fix a compilation warning about unused functions when building
1669 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
1670 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
1672 o Minor bugfixes (configuration):
1673 - Fix pattern-matching for directories on all platforms when using
1674 %include options in configuration files. This patch also fixes
1675 compilation on musl libc based systems. Fixes bug 40141; bugfix
1678 o Minor bugfixes (relay):
1679 - Move the "overload-general" line from extrainfo to the server
1680 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
1682 o Minor bugfixes (testing, BSD):
1683 - Fix pattern-matching errors when patterns expand to invalid paths
1684 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1687 o Documentation (manual):
1688 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
1690 - Indicate that the HiddenServiceStatistics option also applies to
1691 bridges. Closes ticket 40346.
1692 - Move the description of BridgeRecordUsageByCountry to the section
1693 "STATISTICS OPTIONS". Closes ticket 40323.
1696 Changes in version 0.4.6.1-alpha - 2021-03-18
1697 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
1698 improves client circuit performance, adds missing features, and
1699 improves some of our DoS handling and statistics reporting. It also
1700 includes numerous smaller bugfixes.
1702 Below are the changes since 0.4.5.7. (Note that this release DOES
1703 include the fixes for the security bugs already fixed in 0.4.5.7.)
1705 o Major features (control port, onion services):
1706 - Add controller support for creating version 3 onion services with
1707 client authorization. Previously, only v2 onion services could be
1708 created with client authorization. Closes ticket 40084. Patch by
1711 o Major features (directory authority):
1712 - When voting on a relay with a Sybil-like appearance, add the Sybil
1713 flag when clearing out the other flags. This lets a relay operator
1714 know why their relay hasn't been included in the consensus. Closes
1715 ticket 40255. Patch by Neel Chauhan.
1717 o Major features (metrics):
1718 - Relays now report how overloaded they are in their extrainfo
1719 documents. This information is controlled with the
1720 OverloadStatistics torrc option, and it will be used to improve
1721 decisions about the network's load balancing. Implements proposal
1722 328; closes ticket 40222.
1724 o Major features (relay, denial of service):
1725 - Add a new DoS subsystem feature to control the rate of client
1726 connections for relays. Closes ticket 40253.
1728 o Major features (statistics):
1729 - Relays now publish statistics about the number of v3 onion
1730 services and volume of v3 onion service traffic, in the same
1731 manner they already do for v2 onions. Closes ticket 23126.
1733 o Major bugfixes (circuit build timeout):
1734 - Improve the accuracy of our circuit build timeout calculation for
1735 60%, 70%, and 80% build rates for various guard choices. We now
1736 use a maximum likelihood estimator for Pareto parameters of the
1737 circuit build time distribution, instead of a "right-censored
1738 estimator". This causes clients to ignore circuits that never
1739 finish building in their timeout calculations. Previously, clients
1740 were counting such unfinished circuits as having the highest
1741 possible build time value, when in reality these circuits most
1742 likely just contain relays that are offline. We also now wait a
1743 bit longer to let circuits complete for measurement purposes,
1744 lower the minimum possible effective timeout from 1.5 seconds to
1745 10ms, and increase the resolution of the circuit build time
1746 histogram from 50ms bin widths to 10ms bin widths. Additionally,
1747 we alter our estimate Xm by taking the maximum of the top 10 most
1748 common build time values of the 10ms histogram, and compute Xm as
1749 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
1750 - Remove max_time calculation and associated warning from circuit
1751 build timeout 'alpha' parameter estimation, as this is no longer
1752 needed by our new estimator from 40168. Fixes bug 34088; bugfix
1755 o Major bugfixes (signing key):
1756 - In the tor-gencert utility, give an informative error message if
1757 the passphrase given in `--create-identity-key` is too short.
1758 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
1760 o Minor features (bridge):
1761 - We now announce the URL to Tor's new bridge status at
1762 https://bridges.torproject.org/ when Tor is configured to run as a
1763 bridge relay. Closes ticket 30477.
1765 o Minor features (build system):
1766 - New "make lsp" command to auto generate the compile_commands.json
1767 file used by the ccls server. The "bear" program is needed for
1768 this. Closes ticket 40227.
1770 o Minor features (command-line interface):
1771 - Add build informations to `tor --version` in order to ease
1772 reproducible builds. Closes ticket 32102.
1773 - When parsing command-line flags that take an optional argument,
1774 treat the argument as absent if it would start with a '-'
1775 character. Arguments in that form are not intelligible for any of
1776 our optional-argument flags. Closes ticket 40223.
1777 - Allow a relay operator to list the ed25519 keys on the command
1778 line by adding the `rsa` and `ed25519` arguments to the
1779 --list-fingerprint flag to show the respective RSA and ed25519
1780 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
1782 o Minor features (control port, stream handling):
1783 - Add the stream ID to the event line in the ADDRMAP control event.
1784 Closes ticket 40249. Patch by Neel Chauhan.
1786 o Minor features (dormant mode):
1787 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
1788 control over whether the client can become dormant from
1789 inactivity. Most people won't need this. Closes ticket 40228.
1791 o Minor features (logging):
1792 - Change the DoS subsystem heartbeat line format to be more clear on
1793 what has been detected/rejected, and which option is disabled (if
1794 any). Closes ticket 40308.
1795 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
1796 put brackets around IPv6 addresses in log messages. Closes ticket
1797 40232. Patch by Neel Chauhan.
1799 o Minor features (performance, windows):
1800 - Use SRWLocks to implement locking on Windows. Replaces the
1801 "critical section" locking implementation with the faster
1802 SRWLocks, available since Windows Vista. Closes ticket 17927.
1803 Patch by Daniel Pinto.
1805 o Minor features (protocol, proxy support, defense in depth):
1806 - Close HAProxy connections if they somehow manage to send us data
1807 before we start reading. Closes another case of ticket 40017.
1809 o Minor features (tests, portability):
1810 - Port the hs_build_address.py test script to work with recent
1811 versions of python. Closes ticket 40213. Patch from
1814 o Minor features (vote document):
1815 - Add a "stats" line to directory authority votes, to report various
1816 statistics that authorities compute about the relays. This will
1817 help us diagnose the network better. Closes ticket 40314.
1819 o Minor bugfixes (build):
1820 - The configure script now shows whether or not lzma and zstd have
1821 been used, not just if the enable flag was passed in. Fixes bug
1822 40236; bugfix on 0.4.3.1-alpha.
1824 o Minor bugfixes (compatibility):
1825 - Fix a failure in the test cases when running on the "hppa"
1826 architecture, along with a related test that might fail on other
1827 architectures in the future. Fixes bug 40274; bugfix
1830 o Minor bugfixes (controller):
1831 - Fix a "BUG" warning that would appear when a controller chooses
1832 the first hop for a circuit, and that circuit completes. Fixes bug
1833 40285; bugfix on 0.3.2.1-alpha.
1835 o Minor bugfixes (directory authorities, voting):
1836 - Add a new consensus method (31) to support any future changes that
1837 authorities decide to make to the value of bwweightscale or
1838 maxunmeasuredbw. Previously, there was a bug that prevented the
1839 authorities from parsing these consensus parameters correctly under
1840 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
1842 o Minor bugfixes (ipv6):
1843 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
1844 rare configurations might break, but in this case you can disable
1845 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
1846 on 0.4.1.1-alpha. Patch by Neel Chauhan.
1848 o Minor bugfixes (key generation):
1849 - Do not require a valid torrc when using the `--keygen` argument to
1850 generate a signing key. This allows us to generate keys on systems
1851 or users which may not run Tor. Fixes bug 40235; bugfix on
1852 0.2.7.2-alpha. Patch by Neel Chauhan.
1854 o Minor bugfixes (onion services, logging):
1855 - Downgrade the severity of a few rendezvous circuit-related
1856 warnings from warning to info. Fixes bug 40207; bugfix on
1857 0.3.2.1-alpha. Patch by Neel Chauhan.
1859 o Minor bugfixes (relay):
1860 - Reduce the compression level for data streaming from HIGH to LOW.
1861 This should reduce the CPU and memory burden for directory caches.
1862 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1864 o Code simplification and refactoring:
1865 - Remove the orconn_ext_or_id_map structure and related functions.
1866 (Nothing outside of unit tests used them.) Closes ticket 33383.
1867 Patch by Neel Chauhan.
1870 - As of this release, Tor no longer supports the old v2 onion
1871 services. They were deprecated last July for security, and support
1872 will be removed entirely later this year. We strongly encourage
1873 everybody to migrate to v3 onion services. For more information,
1874 see https://blog.torproject.org/v2-deprecation-timeline . Closes
1875 ticket 40266. (NOTE: We accidentally released an earlier version
1876 of the 0.4.6.1-alpha changelog without this entry. Sorry for
1879 o Code simplification and refactoring (metrics, DoS):
1880 - Move the DoS subsystem into the subsys manager, including its
1881 configuration options. Closes ticket 40261.
1883 o Removed features (relay):
1884 - Because DirPorts are only used on authorities, relays no longer
1885 advertise them. Similarly, self-testing for DirPorts has been
1886 disabled, since an unreachable DirPort is no reason for a relay
1887 not to advertise itself. (Configuring a DirPort will still work,
1888 for now.) Closes ticket 40282.
1891 Changes in version 0.3.5.14 - 2021-03-16
1892 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
1893 in earlier versions of Tor.
1895 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1896 who can send directory data to a Tor instance to force that Tor
1897 instance to consume huge amounts of CPU. This is easiest to exploit
1898 against authorities, since anybody can upload to them, but directory
1899 caches could also exploit this vulnerability against relays or clients
1900 when they download. The other vulnerability (TROVE-2021-002) only
1901 affects directory authorities, and would allow an attacker to remotely
1902 crash the authority with an assertion failure. Patches have already
1903 been provided to the authority operators, to help ensure
1906 We recommend that everybody upgrade to one of the releases that fixes
1907 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1910 This release also updates our GeoIP data source, and fixes a
1911 compatibility issue.
1913 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1914 - Disable the dump_desc() function that we used to dump unparseable
1915 information to disk. It was called incorrectly in several places,
1916 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1917 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1918 001 and CVE-2021-28089.
1919 - Fix a bug in appending detached signatures to a pending consensus
1920 document that could be used to crash a directory authority. Fixes
1921 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1924 o Minor features (geoip data, backport from 0.4.5.7):
1925 - We have switched geoip data sources. Previously we shipped IP-to-
1926 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1927 their licensing terms, so we were unable to update them after that
1928 point. We now ship geoip files based on the IPFire Location
1929 Database instead. (See https://location.ipfire.org/ for more
1930 information). This release updates our geoip files to match the
1931 IPFire Location Database as retrieved on 2021/03/12. Closes
1934 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1935 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1936 Closes ticket 40309.
1939 Changes in version 0.4.4.8 - 2021-03-16
1940 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
1941 in earlier versions of Tor.
1943 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1944 who can send directory data to a Tor instance to force that Tor
1945 instance to consume huge amounts of CPU. This is easiest to exploit
1946 against authorities, since anybody can upload to them, but directory
1947 caches could also exploit this vulnerability against relays or clients
1948 when they download. The other vulnerability (TROVE-2021-002) only
1949 affects directory authorities, and would allow an attacker to remotely
1950 crash the authority with an assertion failure. Patches have already
1951 been provided to the authority operators, to help ensure
1954 We recommend that everybody upgrade to one of the releases that fixes
1955 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1958 This release also updates our GeoIP data source, and fixes a
1959 compatibility issue.
1961 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1962 - Disable the dump_desc() function that we used to dump unparseable
1963 information to disk. It was called incorrectly in several places,
1964 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1965 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1966 001 and CVE-2021-28089.
1967 - Fix a bug in appending detached signatures to a pending consensus
1968 document that could be used to crash a directory authority. Fixes
1969 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1972 o Minor features (geoip data, backport from 0.4.5.7):
1973 - We have switched geoip data sources. Previously we shipped IP-to-
1974 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1975 their licensing terms, so we were unable to update them after that
1976 point. We now ship geoip files based on the IPFire Location
1977 Database instead. (See https://location.ipfire.org/ for more
1978 information). This release updates our geoip files to match the
1979 IPFire Location Database as retrieved on 2021/03/12. Closes
1982 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1983 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1984 Closes ticket 40309.
1987 Changes in version 0.4.5.7 - 2021-03-16
1988 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
1991 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1992 who can send directory data to a Tor instance to force that Tor
1993 instance to consume huge amounts of CPU. This is easiest to exploit
1994 against authorities, since anybody can upload to them, but directory
1995 caches could also exploit this vulnerability against relays or clients
1996 when they download. The other vulnerability (TROVE-2021-002) only
1997 affects directory authorities, and would allow an attacker to remotely
1998 crash the authority with an assertion failure. Patches have already
1999 been provided to the authority operators, to help ensure
2002 We recommend that everybody upgrade to one of the releases that fixes
2003 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
2006 This release also updates our GeoIP data source, and fixes a few
2007 smaller bugs in earlier releases.
2009 o Major bugfixes (security, denial of service):
2010 - Disable the dump_desc() function that we used to dump unparseable
2011 information to disk. It was called incorrectly in several places,
2012 in a way that could lead to excessive CPU usage. Fixes bug 40286;
2013 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
2014 001 and CVE-2021-28089.
2015 - Fix a bug in appending detached signatures to a pending consensus
2016 document that could be used to crash a directory authority. Fixes
2017 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
2020 o Minor features (geoip data):
2021 - We have switched geoip data sources. Previously we shipped IP-to-
2022 country mappings from Maxmind's GeoLite2, but in 2019 they changed
2023 their licensing terms, so we were unable to update them after that
2024 point. We now ship geoip files based on the IPFire Location
2025 Database instead. (See https://location.ipfire.org/ for more
2026 information). This release updates our geoip files to match the
2027 IPFire Location Database as retrieved on 2021/03/12. Closes
2030 o Minor bugfixes (directory authority):
2031 - Now that exit relays don't allow exit connections to directory
2032 authority DirPorts (to prevent network reentry), disable
2033 authorities' reachability self test on the DirPort. Fixes bug
2034 40287; bugfix on 0.4.5.5-rc.
2036 o Minor bugfixes (documentation):
2037 - Fix a formatting error in the documentation for
2038 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
2040 o Minor bugfixes (Linux, relay):
2041 - Fix a bug in determining total available system memory that would
2042 have been triggered if the format of Linux's /proc/meminfo file
2043 had ever changed to include "MemTotal:" in the middle of a line.
2044 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
2046 o Minor bugfixes (metrics port):
2047 - Fix a BUG() warning on the MetricsPort for an internal missing
2048 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
2050 o Minor bugfixes (onion service):
2051 - Remove a harmless BUG() warning when reloading tor configured with
2052 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
2054 o Minor bugfixes (portability):
2055 - Fix a non-portable usage of "==" with "test" in the configure
2056 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
2058 o Minor bugfixes (relay):
2059 - Remove a spammy log notice falsely claiming that the IPv4/v6
2060 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
2061 - Do not query the address cache early in the boot process when
2062 deciding if a relay needs to fetch early directory information
2063 from an authority. This bug resulted in a relay falsely believing
2064 it didn't have an address and thus triggering an authority fetch
2065 at each boot. Related to our fix for 40300.
2067 o Removed features (mallinfo deprecated):
2068 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
2069 Closes ticket 40309.
2072 Changes in version 0.4.5.6 - 2021-02-15
2073 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
2074 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
2075 Karsten is best known for creating the Tor metrics portal and leading
2076 the metrics team, but he was involved in Tor from the early days. For
2077 example, while he was still a student he invented and implemented the
2078 v2 onion service directory design, and he also served as an ambassador
2079 to the many German researchers working in the anonymity field. We
2080 loved him and respected him for his patience, his consistency, and his
2081 welcoming approach to growing our community.
2083 This release series introduces significant improvements in relay IPv6
2084 address discovery, a new "MetricsPort" mechanism for relay operators
2085 to measure performance, LTTng support, build system improvements to
2086 help when using Tor as a static library, and significant bugfixes
2087 related to Windows relay performance. It also includes numerous
2088 smaller features and bugfixes.
2090 Below are the changes since 0.4.4.4-rc. For a complete list of changes
2091 since 0.4.4.7, see the ReleaseNotes file.
2093 o Major bugfixes (IPv6, relay):
2094 - Fix a bug that prevented a relay from publishing its descriptor if
2095 an auto-discovered IPv6 that was found unreachable. Fixes bug
2096 40279; bugfix on 0.4.5.1-alpha.
2098 o Minor features (protocol versions):
2099 - Stop claiming to support the "DirCache=1" subprotocol version.
2100 Technically, we stopped supporting this subprotocol back in
2101 0.4.5.1-alpha, but we needed to wait for the authorities to stop
2102 listing it as "required" before we could drop it from the list.
2103 Closes ticket 40221.
2105 o Minor bugfixes (logging):
2106 - Avoid a spurious log message about missing subprotocol versions,
2107 when the consensus that we're reading from is older than the
2108 current release. Previously we had made this message nonfatal, but
2109 in practice, it is never relevant when the consensus is older than
2110 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
2112 o Minor bugfixes (metrics port):
2113 - Fix a bug warning when a metrics port socket was unexpectedly
2114 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
2116 o Minor bugfixes (relay):
2117 - Allow relays to have a RFC1918 address if PublishServerDescriptor
2118 is set to 0 and AssumeReachable is set to 1. This is to support
2119 the use case of a bridge on a local network, exposed via a
2120 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
2122 o Minor bugfixes (relay, config):
2123 - Fix a problem in the removal of duplicate ORPorts from the
2124 internal port list when loading the config file. We were removing
2125 the wrong ports, breaking valid torrc uses cases for multiple
2126 ORPorts of the same address family. Fixes bug 40289; bugfix
2130 Changes in version 0.4.4.7 - 2021-02-03
2131 Tor 0.4.4.7 backports numerous bugfixes from later releases,
2132 including one that made v3 onion services more susceptible to
2133 denial-of-service attacks, and a feature that makes some kinds of
2134 DoS attacks harder to perform.
2136 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
2137 - Stop requiring a live consensus for v3 clients and services, and
2138 allow a "reasonably live" consensus instead. This allows v3 onion
2139 services to work even if the authorities fail to generate a
2140 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2143 o Major feature (exit, backport from 0.4.5.5-rc):
2144 - Re-entry into the network is now denied at the Exit level to all
2145 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2146 should help mitgate a set of denial-of-service attacks. Closes
2149 o Minor feature (build system, backport from 0.4.5.4-rc):
2150 - New "make lsp" command to generate the compile_commands.json file
2151 used by the ccls language server. The "bear" program is needed for
2152 this. Closes ticket 40227.
2154 o Minor features (compilation, backport from 0.4.5.2-rc):
2155 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2156 later. There are a number of APIs newly deprecated in OpenSSL
2157 3.0.0 that Tor still requires. (A later version of Tor will try to
2158 stop depending on these APIs.) Closes ticket 40165.
2160 o Minor features (crypto, backport from 0.4.5.3-rc):
2161 - Fix undefined behavior on our Keccak library. The bug only
2162 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2163 and would result in wrong digests. Fixes bug 40210; bugfix on
2164 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2165 weasel for diagnosing this.
2167 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
2168 - Strip '\r' characters when reading text files on Unix platforms.
2169 This should resolve an issue where a relay operator migrates a
2170 relay from Windows to Unix, but does not change the line ending of
2171 Tor's various state files to match the platform, and the CRLF line
2172 endings from Windows end up leaking into other files such as the
2173 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2175 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
2176 - Fix a compilation warning about unreachable fallthrough
2177 annotations when building with "--enable-all-bugs-are-fatal" on
2178 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2180 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
2181 - Handle partial SOCKS5 messages correctly. Previously, our code
2182 would send an incorrect error message if it got a SOCKS5 request
2183 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2185 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
2186 - Fix the `config/parse_tcp_proxy_line` test so that it works
2187 correctly on systems where the DNS provider hijacks invalid
2188 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2189 - Fix our Python reference-implementation for the v3 onion service
2190 handshake so that it works correctly with the version of hashlib
2191 provided by Python 3.9. Fixes part of bug 40179; bugfix
2193 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2194 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2197 Changes in version 0.4.3.8 - 2021-02-03
2198 Tor 0.4.3.8 backports numerous bugfixes from later releases,
2199 including one that made v3 onion services more susceptible to
2200 denial-of-service attacks, and a feature that makes some kinds of
2201 DoS attacks harder to perform.
2203 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
2204 which will reach end-of-life on 15 Feb 2021.
2206 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
2207 - Stop requiring a live consensus for v3 clients and services, and
2208 allow a "reasonably live" consensus instead. This allows v3 onion
2209 services to work even if the authorities fail to generate a
2210 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2213 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
2214 - Fix a bug where we were undercounting the Tor network's total
2215 onion service traffic, by ignoring any traffic originating from
2216 clients. Now we count traffic from both clients and services.
2217 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2219 o Major feature (exit, backport from 0.4.5.5-rc):
2220 - Re-entry into the network is now denied at the Exit level to all
2221 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2222 should help mitgate a set of denial-of-service attacks. Closes
2225 o Minor feature (build system, backport from 0.4.5.4-rc):
2226 - New "make lsp" command to generate the compile_commands.json file
2227 used by the ccls language server. The "bear" program is needed for
2228 this. Closes ticket 40227.
2230 o Minor features (compilation, backport from 0.4.5.2-rc):
2231 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2232 later. There are a number of APIs newly deprecated in OpenSSL
2233 3.0.0 that Tor still requires. (A later version of Tor will try to
2234 stop depending on these APIs.) Closes ticket 40165.
2236 o Minor features (crypto, backport from 0.4.5.3-rc):
2237 - Fix undefined behavior on our Keccak library. The bug only
2238 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2239 and would result in wrong digests. Fixes bug 40210; bugfix on
2240 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2241 weasel for diagnosing this.
2243 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
2244 - Strip '\r' characters when reading text files on Unix platforms.
2245 This should resolve an issue where a relay operator migrates a
2246 relay from Windows to Unix, but does not change the line ending of
2247 Tor's various state files to match the platform, and the CRLF line
2248 endings from Windows end up leaking into other files such as the
2249 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2251 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
2252 - Resolve a compilation warning that could occur in
2253 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2255 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
2256 - Fix a compilation warning about unreachable fallthrough
2257 annotations when building with "--enable-all-bugs-are-fatal" on
2258 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2260 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
2261 - Handle partial SOCKS5 messages correctly. Previously, our code
2262 would send an incorrect error message if it got a SOCKS5 request
2263 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2265 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
2266 - Fix the `config/parse_tcp_proxy_line` test so that it works
2267 correctly on systems where the DNS provider hijacks invalid
2268 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2269 - Fix our Python reference-implementation for the v3 onion service
2270 handshake so that it works correctly with the version of hashlib
2271 provided by Python 3.9. Fixes part of bug 40179; bugfix
2273 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2274 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2277 Changes in version 0.3.5.13 - 2020-02-03
2278 Tor 0.3.5.13 backports numerous bugfixes from later releases,
2279 including one that made v3 onion services more susceptible to
2280 denial-of-service attacks, and a feature that makes some kinds of
2281 DoS attacks harder to perform.
2283 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
2284 - Stop requiring a live consensus for v3 clients and services, and
2285 allow a "reasonably live" consensus instead. This allows v3 onion
2286 services to work even if the authorities fail to generate a
2287 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2290 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
2291 - Fix a bug where we were undercounting the Tor network's total
2292 onion service traffic, by ignoring any traffic originating from
2293 clients. Now we count traffic from both clients and services.
2294 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2296 o Major feature (exit, backport from 0.4.5.5-rc):
2297 - Re-entry into the network is now denied at the Exit level to all
2298 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2299 should help mitigate a set of denial-of-service attacks. Closes
2302 o Minor feature (build system, backport from 0.4.5.4-rc):
2303 - New "make lsp" command to generate the compile_commands.json file
2304 used by the ccls language server. The "bear" program is needed for
2305 this. Closes ticket 40227.
2307 o Minor features (compilation, backport from 0.4.5.2-rc):
2308 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2309 later. There are a number of APIs newly deprecated in OpenSSL
2310 3.0.0 that Tor still requires. (A later version of Tor will try to
2311 stop depending on these APIs.) Closes ticket 40165.
2313 o Minor features (crypto, backport from 0.4.5.3-rc):
2314 - Fix undefined behavior on our Keccak library. The bug only
2315 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2316 and would result in wrong digests. Fixes bug 40210; bugfix on
2317 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2318 weasel for diagnosing this.
2320 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
2321 - Strip '\r' characters when reading text files on Unix platforms.
2322 This should resolve an issue where a relay operator migrates a
2323 relay from Windows to Unix, but does not change the line ending of
2324 Tor's various state files to match the platform, and the CRLF line
2325 endings from Windows end up leaking into other files such as the
2326 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2328 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
2329 - Resolve a compilation warning that could occur in
2330 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2332 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
2333 - Fix a compilation warning about unreachable fallthrough
2334 annotations when building with "--enable-all-bugs-are-fatal" on
2335 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2337 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
2338 - Handle partial SOCKS5 messages correctly. Previously, our code
2339 would send an incorrect error message if it got a SOCKS5 request
2340 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2342 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
2343 - Fix our Python reference-implementation for the v3 onion service
2344 handshake so that it works correctly with the version of hashlib
2345 provided by Python 3.9. Fixes part of bug 40179; bugfix
2347 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2348 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2351 Changes in version 0.4.5.5-rc - 2021-02-01
2352 Tor 0.4.5.5-rc is the third release candidate in its series. We're
2353 coming closer and closer to a stable release series. This release
2354 fixes an annoyance with address detection code, and somewhat mitigates
2355 an ongoing denial-of-service attack.
2357 We anticipate no more code changes between this and the stable
2358 release, though of course that could change.
2360 o Major feature (exit):
2361 - Re-entry into the network is now denied at the Exit level to all
2362 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2363 should help mitgate a set of denial-of-service attacks. Closes
2366 o Minor bugfixes (relay, configuration):
2367 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
2368 for it can be found in the configuration. Fixes bug 40254; bugfix
2372 Changes in version 0.4.5.4-rc - 2021-01-22
2373 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
2374 several bugs present in previous releases.
2376 We expect that the stable release will be the same, or almost the
2377 same, as this release candidate, unless serious bugs are found.
2379 o Major bugfixes (authority, IPv6):
2380 - Do not consider multiple relays in the same IPv6 /64 network to be
2381 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
2383 o Major bugfixes (directory cache, performance, windows):
2384 - Limit the number of items in the consensus diff cache to 64 on
2385 Windows. We hope this will mitigate an issue where Windows relay
2386 operators reported Tor using 100% CPU, while we investigate better
2387 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
2389 o Minor feature (build system):
2390 - New "make lsp" command to generate the compile_commands.json file
2391 used by the ccls language server. The "bear" program is needed for
2392 this. Closes ticket 40227.
2394 o Minor features (authority, logging):
2395 - Log more information for directory authority operators during the
2396 consensus voting process, and while processing relay descriptors.
2397 Closes ticket 40245.
2398 - Reject obsolete router/extrainfo descriptors earlier and more
2399 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
2402 o Minor bugfixes (compilation):
2403 - Fix another warning about unreachable fallthrough annotations when
2404 building with "--enable-all-bugs-are-fatal" on some compilers.
2405 Fixes bug 40241; bugfix on 0.4.5.3-rc.
2406 - Change the linker flag ordering in our library search code so that
2407 it works for compilers that need the libraries to be listed in the
2408 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
2410 o Minor bugfixes (config, bridge):
2411 - Don't initiate a connection to a bridge configured to use a
2412 missing transport. This change reverts an earlier fix that would
2413 try to avoid such situations during configuration chcecking, but
2414 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
2417 o Minor bugfixes (onion services):
2418 - Avoid a non-fatal assertion in certain edge-cases when
2419 establishing a circuit to an onion service. Fixes bug 32666;
2420 bugfix on 0.3.0.3-alpha.
2422 o Minor bugfixes (relay):
2423 - If we were unable to build our descriptor, don't mark it as having
2424 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
2425 bugfix on 0.4.5.1-alpha.
2428 Changes in version 0.4.5.3-rc - 2021-01-12
2429 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
2430 several bugs, including one that broke onion services on certain older
2431 ARM CPUs, and another that made v3 onion services less reliable.
2433 Though we anticipate that we'll be doing a bit more clean-up between
2434 now and the stable release, we expect that our remaining changes will
2435 be fairly simple. There will be at least one more release candidate
2436 before 0.4.5.x is stable.
2438 o Major bugfixes (onion service v3):
2439 - Stop requiring a live consensus for v3 clients and services, and
2440 allow a "reasonably live" consensus instead. This allows v3 onion
2441 services to work even if the authorities fail to generate a
2442 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2445 o Minor features (crypto):
2446 - Fix undefined behavior on our Keccak library. The bug only
2447 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2448 and would result in wrong digests. Fixes bug 40210; bugfix on
2449 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2450 weasel for diagnosing this.
2452 o Minor features (documentation):
2453 - Mention the "!badexit" directive that can appear in an authority's
2454 approved-routers file, and update the description of the
2455 "!invalid" directive. Closes ticket 40188.
2457 o Minor bugfixes (compilation):
2458 - Fix a compilation warning about unreachable fallthrough
2459 annotations when building with "--enable-all-bugs-are-fatal" on
2460 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2461 - Fix the "--enable-static-tor" switch to properly set the "-static"
2462 compile option onto the tor binary only. Fixes bug 40111; bugfix
2465 o Minor bugfixes (config, bridge):
2466 - Really fix the case where torrc has a missing ClientTransportPlugin
2467 but is configured with a Bridge line and UseBridges. Previously,
2468 we didn't look at the managed proxy list and thus would fail for
2469 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
2471 o Minor bugfixes (logging, relay):
2472 - Log our address as reported by the directory authorities, if none
2473 was configured or detected before. Fixes bug 40201; bugfix
2475 - When a launching bandwidth testing circuit, don't incorrectly call
2476 it a reachability test, or trigger a "CHECKING_REACHABILITY"
2477 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
2479 o Minor bugfixes (relay, statistics):
2480 - Report the correct connection statistics in our extrainfo
2481 documents. Previously there was a problem in the file loading
2482 function which would wrongly truncate a state file, causing the
2483 wrong information to be reported. Fixes bug 40226; bugfix
2486 o Minor bugfixes (SOCKS5):
2487 - Handle partial SOCKS5 messages correctly. Previously, our code
2488 would send an incorrect error message if it got a SOCKS5 request
2489 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2492 Changes in version 0.4.5.2-alpha - 2020-11-23
2493 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
2494 It fixes several bugs present in earlier releases, including one that
2495 made it impractical to run relays on Windows. It also adds a few small
2496 safety features to improve Tor's behavior in the presence of strange
2497 compile-time options, misbehaving proxies, and future versions
2500 o Major bugfixes (relay, windows):
2501 - Fix a bug in our implementation of condition variables on Windows.
2502 Previously, a relay on Windows would use 100% CPU after running
2503 for some time. Because of this change, Tor now require Windows
2504 Vista or later to build and run. Fixes bug 30187; bugfix on
2505 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
2506 the introduction of consensus diffs.) Patch by Daniel Pinto.
2508 o Minor features (compilation):
2509 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2510 later. There are a number of APIs newly deprecated in OpenSSL
2511 3.0.0 that Tor still requires. (A later version of Tor will try to
2512 stop depending on these APIs.) Closes ticket 40165.
2514 o Minor features (protocol, proxy support, defense in depth):
2515 - Respond more deliberately to misbehaving proxies that leave
2516 leftover data on their connections, so as to make Tor even less
2517 likely to allow the proxies to pass their data off as having come
2518 from a relay. Closes ticket 40017.
2520 o Minor features (safety):
2521 - Log a warning at startup if Tor is built with compile-time options
2522 that are likely to make it less stable or reliable. Closes
2525 o Minor bugfixes (circuit, handshake):
2526 - In the v3 handshaking code, use connection_or_change_state() to
2527 change the state. Previously, we changed the state directly, but
2528 this did not pass the state change to the pubsub or channel
2529 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
2530 0.2.3.6-alpha. Patch by Neel Chauhan.
2532 o Minor bugfixes (compilation):
2533 - Use the correct 'ranlib' program when building libtor.a.
2534 Previously we used the default ranlib, which broke some kinds of
2535 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
2536 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
2537 bugfix on 0.4.5.1-alpha.
2538 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
2539 attempt to build. Linux supports that macro but not the BSDs.
2540 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
2542 o Minor bugfixes (configuration):
2543 - Exit Tor on a misconfiguration when the Bridge line is configured
2544 to use a transport but no corresponding ClientTransportPlugin can
2545 be found. Prior to this fix, Tor would attempt to connect to the
2546 bridge directly without using the transport, making it easier for
2547 adversaries to notice the bridge. Fixes bug 25528; bugfix
2549 - Fix an issue where an ORPort was compared with other kinds of
2550 ports, when it should have been only checked against other
2551 ORPorts. This bug would lead to "DirPort auto" getting ignored.
2552 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
2553 - Fix a bug where a second non-ORPort with a variant family (ex:
2554 SocksPort [::1]:9050) would be ignored due to a configuration
2555 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
2557 o Minor bugfixes (crash, relay, signing key):
2558 - Avoid assertion failures when we run Tor from the command line
2559 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
2560 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
2562 o Minor bugfixes (logging):
2563 - Remove trailing whitespace from control event log messages. Fixes
2564 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
2566 - Turn warning-level log message about SENDME failure into a debug-
2567 level message. (This event can happen naturally, and is no reason
2568 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
2570 o Minor bugfixes (relay, address discovery):
2571 - Don't trigger an IP change when no new valid IP can be found.
2572 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
2573 - When attempting to discover our IP, use a simple test circuit,
2574 rather than a descriptor fetch: the same address information is
2575 present in NETINFO cells, and is better authenticated there. Fixes
2576 bug 40071; bugfix on 0.4.5.1-alpha.
2578 o Minor bugfixes (testing):
2579 - Fix the `config/parse_tcp_proxy_line` test so that it works
2580 correctly on systems where the DNS provider hijacks invalid
2581 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2582 - Fix unit tests that used newly generated list of routers so that
2583 they check them with respect to the date when they were generated,
2584 not with respect to the current time. Fixes bug 40187; bugfix
2586 - Fix our Python reference-implementation for the v3 onion service
2587 handshake so that it works correctly with the version of hashlib
2588 provided by Python 3.9. Fixes part of bug 40179; bugfix
2590 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2591 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2593 o Removed features (controller):
2594 - Remove the "GETINFO network-status" controller command. It has
2595 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
2598 Changes in version 0.4.4.6 - 2020-11-12
2599 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
2600 backports fixes from later releases, including a fix for TROVE-2020-
2601 005, a security issue that could be used, under certain cases, by an
2602 adversary to observe traffic patterns on a limited number of circuits
2603 intended for a different relay.
2605 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2606 - When completing a channel, relays now check more thoroughly to
2607 make sure that it matches any pending circuits before attaching
2608 those circuits. Previously, address correctness and Ed25519
2609 identities were not checked in this case, but only when extending
2610 circuits on an existing channel. Fixes bug 40080; bugfix on
2611 0.2.7.2-alpha. Resolves TROVE-2020-005.
2613 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
2614 - Authorities now list a different set of protocols as required and
2615 recommended. These lists have been chosen so that only truly
2616 recommended and/or required protocols are included, and so that
2617 clients using 0.2.9 or later will continue to work (even though
2618 they are not supported), whereas only relays running 0.3.5 or
2619 later will meet the requirements. Closes ticket 40162.
2620 - Make it possible to specify multiple ConsensusParams torrc lines.
2621 Now directory authority operators can for example put the main
2622 ConsensusParams config in one torrc file and then add to it from a
2623 different torrc file. Closes ticket 40164.
2625 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2626 - Tor no longer allows subprotocol versions larger than 63.
2627 Previously version numbers up to UINT32_MAX were allowed, which
2628 significantly complicated our code. Implements proposal 318;
2629 closes ticket 40133.
2631 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2632 - Fix a rendezvous cache unit test that was triggering an underflow
2633 on the global rend cache allocation. Fixes bug 40125; bugfix
2635 - Fix another rendezvous cache unit test that was triggering an
2636 underflow on the global rend cache allocation. Fixes bug 40126;
2637 bugfix on 0.2.8.1-alpha.
2639 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
2640 - Fix compiler warnings that would occur when building with
2641 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2642 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2643 - Resolve a compilation warning that could occur in
2644 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2646 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2647 - Remove a debug logging statement that uselessly spammed the logs.
2648 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2650 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2651 - Avoid a fatal assert() when failing to create a listener
2652 connection for an address that was in use. Fixes bug 40073; bugfix
2655 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2656 - For HSFETCH commands on v2 onion services addresses, check the
2657 length of bytes decoded, not the base32 length. Fixes bug 34400;
2658 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2661 Changes in version 0.4.3.7 - 2020-11-12
2662 Tor 0.4.3.7 backports several bugfixes from later releases. It
2663 includes a fix for TROVE-2020-005, a security issue that could be
2664 used, under certain cases, by an adversary to observe traffic patterns
2665 on a limited number of circuits intended for a different relay.
2667 Please be aware that support for the 0.4.3.x series will end on 15
2668 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
2669 downgrade to 0.3.5.x, which will be supported until at least 1
2672 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2673 - Replace the 148 fallback directories originally included in Tor
2674 0.4.1.4-rc (of which around 105 are still functional) with a list
2675 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2677 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2678 - When completing a channel, relays now check more thoroughly to
2679 make sure that it matches any pending circuits before attaching
2680 those circuits. Previously, address correctness and Ed25519
2681 identities were not checked in this case, but only when extending
2682 circuits on an existing channel. Fixes bug 40080; bugfix on
2683 0.2.7.2-alpha. Resolves TROVE-2020-005.
2685 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2686 - When running with NSS enabled, make sure that NSS knows to expect
2687 nonblocking sockets. Previously, we set our TCP sockets as
2688 nonblocking, but did not tell NSS, which in turn could lead to
2689 unexpected blocking behavior. Fixes bug 40035; bugfix
2692 o Minor features (security, backport from 0.4.4.4-rc):
2693 - Channels using obsolete versions of the Tor link protocol are no
2694 longer allowed to circumvent address-canonicity checks. (This is
2695 only a minor issue, since such channels have no way to set ed25519
2696 keys, and therefore should always be rejected for circuits that
2697 specify ed25519 identities.) Closes ticket 40081.
2699 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2700 - Tor no longer allows subprotocol versions larger than 63.
2701 Previously version numbers up to UINT32_MAX were allowed, which
2702 significantly complicated our code. Implements proposal 318;
2703 closes ticket 40133.
2705 o Minor features (tests, backport from 0.4.4.5):
2706 - Our "make check" target now runs the unit tests in 8 parallel
2707 chunks. Doing this speeds up hardened CI builds by more than a
2708 factor of two. Closes ticket 40098.
2710 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2711 - Fix a rendezvous cache unit test that was triggering an underflow
2712 on the global rend cache allocation. Fixes bug 40125; bugfix
2714 - Fix another rendezvous cache unit test that was triggering an
2715 underflow on the global rend cache allocation. Fixes bug 40126;
2716 bugfix on 0.2.8.1-alpha.
2718 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2719 - Fix a correctness bug that could cause an assertion failure if we
2720 ever tried using the buf_move_all() function with an empty input
2721 buffer. As far as we know, no released versions of Tor do this.
2722 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2724 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2725 - Remove a debug logging statement that uselessly spammed the logs.
2726 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2728 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2729 - On a bridge, treat all connections from an ExtORPort as remote by
2730 default for the purposes of rate-limiting. Previously, bridges
2731 would treat the connection as local unless they explicitly
2732 received a "USERADDR" command. ExtORPort connections still count
2733 as local if there is a USERADDR command with an explicit local
2734 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2736 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2737 - Avoid a fatal assert() when failing to create a listener
2738 connection for an address that was in use. Fixes bug 40073; bugfix
2741 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2742 - Adjust the rules for when to warn about having too many
2743 connections to other relays. Previously we'd tolerate up to 1.5
2744 connections per relay on average. Now we tolerate more connections
2745 for directory authorities, and raise the number of total
2746 connections we need to see before we warn. Fixes bug 33880; bugfix
2749 o Minor bugfixes (tests, 0.4.4.5):
2750 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2751 on its own. Previously, it would exit with an error. Fixes bug
2752 40099; bugfix on 0.2.8.1-alpha.
2754 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2755 - For HSFETCH commands on v2 onion services addresses, check the
2756 length of bytes decoded, not the base32 length. Fixes bug 34400;
2757 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2759 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2760 - Fix a bug that prevented Tor from starting if its log file grew
2761 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2763 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2764 - Add a deprecation warning for version 2 onion services. Closes
2767 o Removed features (backport from 0.4.4.3-alpha):
2768 - Our "check-local" test target no longer tries to use the
2769 Coccinelle semantic patching tool parse all the C files. While it
2770 is a good idea to try to make sure Coccinelle works on our C
2771 before we run a Coccinelle patch, doing so on every test run has
2772 proven to be disruptive. You can still run this tool manually with
2773 "make check-cocci". Closes ticket 40030. ticket 40030.
2776 Changes in version 0.3.5.12 - 2020-11-12
2777 Tor 0.4.3.7 backports several bugfixes from later releases. It
2778 includes a fix for TROVE-2020-005, a security issue that could be
2779 used, under certain cases, by an adversary to observe traffic patterns
2780 on a limited number of circuits intended for a different relay.
2782 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2783 - Replace the 148 fallback directories originally included in Tor
2784 0.4.1.4-rc (of which around 105 are still functional) with a list
2785 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2787 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2788 - When completing a channel, relays now check more thoroughly to
2789 make sure that it matches any pending circuits before attaching
2790 those circuits. Previously, address correctness and Ed25519
2791 identities were not checked in this case, but only when extending
2792 circuits on an existing channel. Fixes bug 40080; bugfix on
2793 0.2.7.2-alpha. Resolves TROVE-2020-005.
2795 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2796 - When running with NSS enabled, make sure that NSS knows to expect
2797 nonblocking sockets. Previously, we set our TCP sockets as
2798 nonblocking, but did not tell NSS, which in turn could lead to
2799 unexpected blocking behavior. Fixes bug 40035; bugfix
2802 o Minor features (security, backport from 0.4.4.4-rc):
2803 - Channels using obsolete versions of the Tor link protocol are no
2804 longer allowed to circumvent address-canonicity checks. (This is
2805 only a minor issue, since such channels have no way to set ed25519
2806 keys, and therefore should always be rejected for circuits that
2807 specify ed25519 identities.) Closes ticket 40081.
2809 o Minor features (debugging, directory system):
2810 - Don't crash when we find a non-guard with a guard-fraction value
2811 set. Instead, log a bug warning, in an attempt to figure out how
2812 this happened. Diagnostic for ticket 32868.
2814 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2815 - Tor no longer allows subprotocol versions larger than 63.
2816 Previously version numbers up to UINT32_MAX were allowed, which
2817 significantly complicated our code. Implements proposal 318;
2818 closes ticket 40133.
2820 o Minor features (tests, backport from 0.4.4.5):
2821 - Our "make check" target now runs the unit tests in 8 parallel
2822 chunks. Doing this speeds up hardened CI builds by more than a
2823 factor of two. Closes ticket 40098.
2825 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2826 - Fix a rendezvous cache unit test that was triggering an underflow
2827 on the global rend cache allocation. Fixes bug 40125; bugfix
2829 - Fix another rendezvous cache unit test that was triggering an
2830 underflow on the global rend cache allocation. Fixes bug 40126;
2831 bugfix on 0.2.8.1-alpha.
2833 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2834 - Fix a correctness bug that could cause an assertion failure if we
2835 ever tried using the buf_move_all() function with an empty input
2836 buffer. As far as we know, no released versions of Tor do this.
2837 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2839 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2840 - Remove a debug logging statement that uselessly spammed the logs.
2841 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2843 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2844 - On a bridge, treat all connections from an ExtORPort as remote by
2845 default for the purposes of rate-limiting. Previously, bridges
2846 would treat the connection as local unless they explicitly
2847 received a "USERADDR" command. ExtORPort connections still count
2848 as local if there is a USERADDR command with an explicit local
2849 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2851 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2852 - Avoid a fatal assert() when failing to create a listener
2853 connection for an address that was in use. Fixes bug 40073; bugfix
2856 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2857 - Adjust the rules for when to warn about having too many
2858 connections to other relays. Previously we'd tolerate up to 1.5
2859 connections per relay on average. Now we tolerate more connections
2860 for directory authorities, and raise the number of total
2861 connections we need to see before we warn. Fixes bug 33880; bugfix
2864 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2865 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2866 descriptors, when the IPv6 port was configured as "auto". Fixes
2867 bug 32588; bugfix on 0.2.3.9-alpha.
2869 o Minor bugfixes (tests, 0.4.4.5):
2870 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2871 on its own. Previously, it would exit with an error. Fixes bug
2872 40099; bugfix on 0.2.8.1-alpha.
2874 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2875 - Fix a bug that prevented Tor from starting if its log file grew
2876 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2878 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2879 - Add a deprecation warning for version 2 onion services. Closes
2883 Changes in version 0.4.5.1-alpha - 2020-11-01
2884 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
2885 improves support for IPv6, address discovery and self-testing, code
2886 metrics and tracing.
2888 This release also fixes TROVE-2020-005, a security issue that could be
2889 used, under certain cases, by an adversary to observe traffic patterns
2890 on a limited number of circuits intended for a different relay. To
2891 mount this attack, the adversary would need to actively extend
2892 circuits to an incorrect address, as well as compromise a relay's
2893 legacy RSA-1024 key. We'll be backporting this fix to other release
2894 series soon, after it has had some testing.
2896 Here are the changes since 0.4.4.5.
2898 o Major features (build):
2899 - When building Tor, first link all object files into a single
2900 static library. This may help with embedding Tor in other
2901 programs. Note that most Tor functions do not constitute a part of
2902 a stable or supported API: only those functions in tor_api.h
2903 should be used if embedding Tor. Closes ticket 40127.
2905 o Major features (metrics):
2906 - Introduce a new MetricsPort which exposes, through an HTTP
2907 interface, a series of metrics that tor collects at runtime. At
2908 the moment, the only supported output format is Prometheus data
2909 model. Closes ticket 40063. See the manual page for more
2910 information and security considerations.
2911 o Major features (relay, IPv6):
2912 - The torrc option Address now supports IPv6. This unifies our
2913 address discovery interface to support IPv4, IPv6, and hostnames.
2914 Closes ticket 33233.
2915 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
2916 bridges. Closes ticket 33222.
2917 - Relays now automatically bind on IPv6 for their ORPort, unless
2918 specified otherwise with the IPv4Only flag. Closes ticket 33246.
2919 - When a relay with IPv6 support is told to open a connection to
2920 another relay, and the extend cell lists both IPv4 and IPv6
2921 addresses, the first relay now picks randomly which address to
2922 use. Closes ticket 33220.
2923 - Relays now track their IPv6 ORPort reachability separately from
2924 the reachability of their IPv4 ORPort. They will not publish a
2925 descriptor unless _both_ ports appear to be externally reachable.
2926 Closes ticket 34067.
2928 o Major features (tracing):
2929 - Add event-tracing library support for USDT and LTTng-UST, and a
2930 few tracepoints in the circuit subsystem. More will come
2931 incrementally. This feature is compiled out by default: it needs
2932 to be enabled at configure time. See documentation in
2933 doc/HACKING/Tracing.md. Closes ticket 32910.
2935 o Major bugfixes (security):
2936 - When completing a channel, relays now check more thoroughly to
2937 make sure that it matches any pending circuits before attaching
2938 those circuits. Previously, address correctness and Ed25519
2939 identities were not checked in this case, but only when extending
2940 circuits on an existing channel. Fixes bug 40080; bugfix on
2941 0.2.7.2-alpha. Resolves TROVE-2020-005.
2943 o Major bugfixes (TLS, buffer):
2944 - When attempting to read N bytes on a TLS connection, really try to
2945 read all N bytes. Previously, Tor would stop reading after the
2946 first TLS record, which can be smaller than the N bytes requested,
2947 and not check for more data until the next mainloop event. Fixes
2948 bug 40006; bugfix on 0.1.0.5-rc.
2950 o Minor features (address discovery):
2951 - If no Address statements are found, relays now prioritize guessing
2952 their address by looking at the local interface instead of the
2953 local hostname. If the interface address can't be found, the local
2954 hostname is used. Closes ticket 33238.
2956 o Minor features (admin tools):
2957 - Add a new --format argument to -key-expiration option to allow
2958 specifying the time format of the expiration date. Adds Unix
2959 timestamp format support. Patch by Daniel Pinto. Closes
2962 o Minor features (bootstrap reporting):
2963 - When reporting bootstrapping status on a relay, do not consider
2964 connections that have never been the target of an origin circuit.
2965 Previously, all connection failures were treated as potential
2966 bootstrapping failures, including connections that had been opened
2967 because of client requests. Closes ticket 25061.
2969 o Minor features (build):
2970 - When running the configure script, try to detect version
2971 mismatches between the OpenSSL headers and libraries, and suggest
2972 that the user should try "--with-openssl-dir". Closes 40138.
2973 - If the configure script has given any warnings, remind the user
2974 about them at the end of the script. Related to 40138.
2976 o Minor features (configuration):
2977 - Allow using wildcards (* and ?) with the %include option on
2978 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
2979 - Allow the configuration options EntryNodes, ExcludeNodes,
2980 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
2981 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
2982 Patch by Daniel Pinto.
2984 o Minor features (control port):
2985 - Add a DROPTIMEOUTS command to drop circuit build timeout history
2986 and reset the current timeout. Closes ticket 40002.
2987 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
2988 send a control port event. Closes ticket 32190. Patch by
2990 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
2991 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
2992 onion handshake counts respectively. Closes ticket 28279. Patch by
2995 o Minor features (control port, IPv6):
2996 - Tor relays now try to report to the controller when they are
2997 launching an IPv6 self-test. Closes ticket 34068.
2998 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
2999 control port to fetch the Tor host's respective IPv4 or IPv6
3000 address. We keep "GETINFO address" for backwards-compatibility.
3001 Closes ticket 40039. Patch by Neel Chauhan.
3003 o Minor features (directory authorities):
3004 - Authorities now list a different set of protocols as required and
3005 recommended. These lists have been chosen so that only truly
3006 recommended and/or required protocols are included, and so that
3007 clients using 0.2.9 or later will continue to work (even though
3008 they are not supported), whereas only relays running 0.3.5 or
3009 later will meet the requirements. Closes ticket 40162.
3010 - Add a new consensus method 30 that removes the unnecessary "="
3011 padding from ntor-onion-key. Closes ticket 7869. Patch by
3013 - Directory authorities now reject descriptors from relays running
3014 Tor versions from the obsolete 0.4.1 series. Resolves ticket
3015 34357. Patch by Neel Chauhan.
3016 - Make it possible to specify multiple ConsensusParams torrc lines.
3017 Now directory authority operators can for example put the main
3018 ConsensusParams config in one torrc file and then add to it from a
3019 different torrc file. Closes ticket 40164.
3020 - The AssumeReachable option no longer stops directory authorities
3021 from checking whether other relays are running. A new
3022 AuthDirTestReachability option can be used to disable these
3023 checks. Closes ticket 34445.
3024 - When looking for possible Sybil attacks, also consider IPv6
3025 addresses. Two routers are considered to have "the same" address
3026 by this metric if they are in the same /64 network. Patch from
3027 Maurice Pibouin. Closes ticket 7193.
3029 o Minor features (directory authorities, IPv6):
3030 - Make authorities add their IPv6 ORPort (if any) to the trusted
3031 servers list. Authorities previously added only their IPv4
3032 addresses. Closes ticket 32822.
3034 o Minor features (ed25519, relay):
3035 - Save a relay's base64-encoded ed25519 identity key to the data
3036 directory in a file named fingerprint-ed25519. Closes ticket
3037 30642. Patch by Neel Chauhan.
3039 o Minor features (heartbeat):
3040 - Include the total number of inbound and outbound IPv4 and IPv6
3041 connections in the heartbeat message. Closes ticket 29113.
3043 o Minor features (IPv6, ExcludeNodes):
3044 - Handle IPv6 addresses in ExcludeNodes; previously they were
3045 ignored. Closes ticket 34065. Patch by Neel Chauhan.
3047 o Minor features (logging):
3048 - Add the running glibc version to the log, and the compiled glibc
3049 version to the library list returned when using --library-versions.
3050 Patch from Daniel Pinto. Closes ticket 40047.
3051 - Consider an HTTP 301 response to be an error (like a 404) when
3052 processing a directory response. Closes ticket 40053.
3053 - Log directory fetch statistics as a single line. Closes
3055 - Provide more complete descriptions of our connections when logging
3056 about them. Closes ticket 40041.
3057 - When describing a relay in the logs, we now include its ed25519
3058 identity. Closes ticket 22668.
3060 o Minor features (onion services):
3061 - Only overwrite an onion service's existing hostname file if its
3062 contents are wrong. This enables read-only onion-service
3063 directories. Resolves ticket 40062. Patch by Neel Chauhan.
3065 o Minor features (pluggable transports):
3066 - Add an OutboundBindAddressPT option to allow users to specify
3067 which IPv4 and IPv6 address pluggable transports should use for
3068 outgoing IP packets. Tor does not have a way to enforce that the
3069 pluggable transport honors this option, so each pluggable transport
3070 needs to implement support on its own. Closes ticket 5304.
3072 o Minor features (relay address tracking):
3073 - We now store relay addresses for OR connections in a more logical
3074 way. Previously we would sometimes overwrite the actual address of
3075 a connection with a "canonical address", and then store the "real
3076 address" elsewhere to remember it. We now track the "canonical
3077 address" elsewhere for the cases where we need it, and leave the
3078 connection's address alone. Closes ticket 33898.
3080 o Minor features (relay):
3081 - If a relay is unable to discover its address, attempt to learn it
3082 from the NETINFO cell. Closes ticket 40022.
3083 - Log immediately when launching a relay self-check. Previously we
3084 would try to log before launching checks, or approximately when we
3085 intended to launch checks, but this tended to be error-prone.
3086 Closes ticket 34137.
3088 o Minor features (relay, address discovery):
3089 - If Address option is not found in torrc, attempt to learn our
3090 address with the configured ORPort address if any. Closes
3093 o Minor features (relay, IPv6):
3094 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
3095 reachability. Closes part of ticket 33224.
3096 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
3097 parameters to be used in an emergency to tell relays that they
3098 should publish even if they cannot complete their ORPort self-
3099 checks. Closes ticket 34064 and part of 33224.
3100 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
3101 - Declare support for the Relay=3 subprotocol version. Closes
3103 - When launching IPv6 ORPort self-test circuits, make sure that the
3104 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
3106 o Minor features (specification update):
3107 - Several fields in microdescriptors, router descriptors, and
3108 consensus documents that were formerly optional are now required.
3109 Implements proposal 315; closes ticket 40132.
3111 o Minor features (state management):
3112 - When loading the state file, remove entries from the statefile
3113 that have been obsolete for a long time. Ordinarily Tor preserves
3114 unrecognized entries in order to keep forward-compatibility, but
3115 these entries have not actually been used in any release since
3116 before 0.3.5.x. Closes ticket 40137.
3118 o Minor features (statistics, ipv6):
3119 - Relays now publish IPv6-specific counts of single-direction versus
3120 bidirectional relay connections. Closes ticket 33264.
3121 - Relays now publish their IPv6 read and write statistics over time,
3122 if statistics are enabled. Closes ticket 33263.
3124 o Minor features (subprotocol versions):
3125 - Tor no longer allows subprotocol versions larger than 63.
3126 Previously version numbers up to UINT32_MAX were allowed, which
3127 significantly complicated our code. Implements proposal 318;
3128 closes ticket 40133.
3129 - Use the new limitations on subprotocol versions due to proposal
3130 318 to simplify our implementation. Part of ticket 40133.
3132 o Minor features (testing configuration):
3133 - The TestingTorNetwork option no longer implicitly sets
3134 AssumeReachable to 1. This change allows us to test relays' self-
3135 testing mechanisms, and to test authorities' relay-testing
3136 functionality. Closes ticket 34446.
3138 o Minor features (testing):
3139 - Added unit tests for channel_matches_target_addr_for_extend().
3140 Closes Ticket 33919. Patch by MrSquanchee.
3142 o Minor features (tests, v2 onion services):
3143 - Fix a rendezvous cache unit test that was triggering an underflow
3144 on the global rend cache allocation. Fixes bug 40125; bugfix
3146 - Fix another rendezvous cache unit test that was triggering an
3147 underflow on the global rend cache allocation. Fixes bug 40126;
3148 bugfix on 0.2.8.1-alpha.
3150 o Minor bugfixes (circuit padding):
3151 - When circpad_send_padding_cell_for_callback is called,
3152 `is_padding_timer_scheduled` flag was not reset. Now it is set to
3153 0 at the top of that function. Fixes bug 32671; bugfix
3155 - Add a per-circuit padding machine instance counter, so we can
3156 differentiate between shutdown requests for old machines on a
3157 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
3158 - Add the ability to keep circuit padding machines if they match a
3159 set of circuit states or purposes. This allows us to have machines
3160 that start up under some conditions but don't shut down under
3161 others. We now use this mask to avoid starting up introduction
3162 circuit padding again after the machines have already completed.
3163 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
3165 o Minor bugfixes (compatibility):
3166 - Strip '\r' characters when reading text files on Unix platforms.
3167 This should resolve an issue where a relay operator migrates a
3168 relay from Windows to Unix, but does not change the line ending of
3169 Tor's various state files to match the platform, and the CRLF line
3170 endings from Windows end up leaking into other files such as the
3171 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
3173 o Minor bugfixes (compilation):
3174 - Fix compiler warnings that would occur when building with
3175 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
3176 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
3177 - Resolve a compilation warning that could occur in
3178 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
3180 o Minor bugfixes (configuration):
3181 - Fix bug where %including a pattern ending with */ would include
3182 files and folders (instead of folders only) in versions of glibc <
3183 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
3186 o Minor bugfixes (control port):
3187 - Make sure we send the SOCKS request address in relay begin cells
3188 when a stream is attached with the purpose
3189 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
3190 Patch by Neel Chauhan.
3192 o Minor bugfixes (logging):
3193 - Remove a debug logging statement that uselessly spammed the logs.
3194 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
3195 - When logging a rate-limited message about how many messages have
3196 been suppressed in the last N seconds, give an accurate value for
3197 N, rounded up to the nearest minute. Previously we would report
3198 the size of the rate-limiting interval, regardless of when the
3199 messages started to occur. Fixes bug 19431; bugfix
3202 o Minor bugfixes (relay configuration, crash):
3203 - Avoid a fatal assert() when failing to create a listener
3204 connection for an address that was in use. Fixes bug 40073; bugfix
3207 o Minor bugfixes (rust, protocol versions):
3208 - Declare support for the onion service introduction point denial of
3209 service extensions when building with Rust. Fixes bug 34248;
3210 bugfix on 0.4.2.1-alpha.
3211 - Make Rust protocol version support checks consistent with the
3212 undocumented error behavior of the corresponding C code. Fixes bug
3213 34251; bugfix on 0.3.3.5-rc.
3215 o Minor bugfixes (self-testing):
3216 - When receiving an incoming circuit, only accept it as evidence
3217 that we are reachable if the declared address of its channel is
3218 the same address we think that we have. Otherwise, it could be
3219 evidence that we're reachable on some other address. Fixes bug
3220 20165; bugfix on 0.1.0.1-rc.
3222 o Minor bugfixes (spec conformance):
3223 - Use the correct key type when generating signing->link
3224 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
3226 o Minor bugfixes (subprotocol versions):
3227 - Consistently reject extra commas, instead of only rejecting
3228 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
3229 - In summarize_protover_flags(), treat empty strings the same as
3230 NULL. This prevents protocols_known from being set. Previously, we
3231 treated empty strings as normal strings, which led to
3232 protocols_known being set. Fixes bug 34232; bugfix on
3233 0.3.3.2-alpha. Patch by Neel Chauhan.
3235 o Minor bugfixes (v2 onion services):
3236 - For HSFETCH commands on v2 onion services addresses, check the
3237 length of bytes decoded, not the base32 length. Fixes bug 34400;
3238 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
3240 o Code simplification and refactoring:
3241 - Add and use a set of functions to perform down-casts on constant
3242 connection and channel pointers. Closes ticket 40046.
3243 - Refactor our code that logs descriptions of connections, channels,
3244 and the peers on them, to use a single call path. This change
3245 enables us to refactor the data types that they use, and eliminates
3246 many confusing usages of those types. Closes ticket 40041.
3247 - Refactor some common node selection code into a single function.
3248 Closes ticket 34200.
3249 - Remove the now-redundant 'outbuf_flushlen' field from our
3250 connection type. It was previously used for an older version of
3251 our rate-limiting logic. Closes ticket 33097.
3252 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
3253 instead, for consistency with other code. Closes ticket 18106.
3254 - Rename functions about "advertised" ports which are not in fact
3255 guaranteed to return the ports that have been advertised. Closes
3257 - Split implementation of several command line options from
3258 options_init_from_torrc into smaller isolated functions. Patch by
3259 Daniel Pinto. Closes ticket 40102.
3260 - When an extend cell is missing an IPv4 or IPv6 address, fill in
3261 the address from the extend info. This is similar to what was done
3262 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
3265 o Deprecated features:
3266 - The "non-builtin" argument to the "--dump-config" command is now
3267 deprecated. When it works, it behaves the same as "short", which
3268 you should use instead. Closes ticket 33398.
3271 - Replace URLs from our old bugtracker so that they refer to the new
3272 bugtracker and wiki. Closes ticket 40101.
3275 - We no longer ship or build a "tor.service" file for use with
3276 systemd. No distribution included this script unmodified, and we
3277 don't have the expertise ourselves to maintain this in a way that
3278 all the various systemd-based distributions can use. Closes
3280 - We no longer ship support for the Android logging API. Modern
3281 versions of Android can use the syslog API instead. Closes
3283 - The "optimistic data" feature is now always on; there is no longer
3284 an option to disable it from the torrc file or from the consensus
3285 directory. Closes part of 40139.
3286 - The "usecreatefast" network parameter is now removed; there is no
3287 longer an option for authorities to turn it off. Closes part
3291 - Add unit tests for bandwidth statistics manipulation functions.
3292 Closes ticket 33812. Patch by MrSquanchee.
3294 o Code simplification and refactoring (autoconf):
3295 - Remove autoconf checks for unused funcs and headers. Closes ticket
3296 31699; Patch by @bduszel
3298 o Code simplification and refactoring (maintainer scripts):
3299 - Disable by default the pre-commit hook. Use the environment
3300 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
3301 Furthermore, stop running practracker in the pre-commit hook and
3302 make check-local. Closes ticket 40019.
3304 o Code simplification and refactoring (relay address):
3305 - Most of IPv4 representation was using "uint32_t". It has now been
3306 moved to use the internal "tor_addr_t" interface instead. This is
3307 so we can properly integrate IPv6 along IPv4 with common
3308 interfaces. Closes ticket 40043.
3310 o Documentation (manual page):
3311 - Move them from doc/ to doc/man/. Closes ticket 40044.
3312 - Describe the status of the "Sandbox" option more accurately. It is
3313 no longer "experimental", but it _is_ dependent on kernel and libc
3314 versions. Closes ticket 23378.
3316 o Documentation (tracing):
3317 - Document in depth the circuit subsystem trace events in the new
3318 doc/tracing/EventsCircuit.md. Closes ticket 40036.
3321 Changes in version 0.4.4.5 - 2020-09-15
3322 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
3323 series improves our guard selection algorithms, adds v3 onion balance
3324 support, improves the amount of code that can be disabled when running
3325 without relay support, and includes numerous small bugfixes and
3326 enhancements. It also lays the ground for some IPv6 features that
3327 we'll be developing more in the next (0.4.5) series.
3329 Per our support policy, we support each stable release series for nine
3330 months after its first stable release, or three months after the first
3331 stable release of the next series: whichever is longer. This means
3332 that 0.4.4.x will be supported until around June 2021--or later, if
3333 0.4.5.x is later than anticipated.
3335 Note also that support for 0.4.2.x has just ended; support for 0.4.3
3336 will continue until Feb 15, 2021. We still plan to continue supporting
3337 0.3.5.x, our long-term stable series, until Feb 2022.
3339 Below are the changes since 0.4.4.4-rc. For a complete list of changes
3340 since 0.4.3.6, see the ReleaseNotes file.
3342 o Major bugfixes (onion services, DoS):
3343 - Correct handling of parameters for the onion service DoS defense.
3344 Previously, the consensus parameters for the onion service DoS
3345 defenses were overwriting the parameters set by the service
3346 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
3347 40109; bugfix on 0.4.2.1-alpha.
3349 o Major bugfixes (stats, onion services):
3350 - Fix a bug where we were undercounting the Tor network's total
3351 onion service traffic, by ignoring any traffic originating from
3352 clients. Now we count traffic from both clients and services.
3353 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
3355 o Minor features (control port):
3356 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
3357 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
3358 Closes ticket 40089. Patch by Neel Chauhan.
3360 o Minor features (denial-of-service memory limiter):
3361 - Allow the user to configure even lower values for the
3362 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
3363 when previously the minimum was 256 MB. On clients, there is no
3364 minimum. Relays and clients will both warn if the value is set so
3365 low that Tor is likely to stop working. Closes ticket 24308.
3367 o Minor features (tests):
3368 - Our "make check" target now runs the unit tests in 8 parallel
3369 chunks. Doing this speeds up hardened CI builds by more than a
3370 factor of two. Closes ticket 40098.
3372 o Minor bugfixes (guard selection algorithm):
3373 - Avoid needless guard-related warning when upgrading from 0.4.3 to
3374 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
3376 o Minor bugfixes (tests):
3377 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
3378 on its own. Previously, it would exit with an error. Fixes bug
3379 40099; bugfix on 0.2.8.1-alpha.
3382 Changes in version 0.4.4.3-alpha - 2020-07-27
3383 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
3384 including one affecting NSS users, and several affecting the Linux
3387 o Major features (fallback directory list):
3388 - Replace the 148 fallback directories originally included in Tor
3389 0.4.1.4-rc (of which around 105 are still functional) with a list
3390 of 144 fallbacks generated in July 2020. Closes ticket 40061.
3392 o Major bugfixes (NSS):
3393 - When running with NSS enabled, make sure that NSS knows to expect
3394 nonblocking sockets. Previously, we set our TCP sockets as
3395 nonblocking, but did not tell NSS, which in turn could lead to
3396 unexpected blocking behavior. Fixes bug 40035; bugfix
3399 o Minor bugfixes (linux seccomp2 sandbox):
3400 - Fix a regression on sandboxing rules for the openat() syscall. The
3401 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
3402 but broke with versions of glibc. We now choose a rule based on
3403 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
3405 - Makes the seccomp sandbox allow the correct syscall for opendir
3406 according to the running glibc version. This fixes crashes when
3407 reloading torrc with sandbox enabled when running on glibc 2.15 to
3408 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
3411 o Minor bugfixes (relay, usability):
3412 - Adjust the rules for when to warn about having too many
3413 connections to other relays. Previously we'd tolerate up to 1.5
3414 connections per relay on average. Now we tolerate more connections
3415 for directory authorities, and raise the number of total
3416 connections we need to see before we warn. Fixes bug 33880; bugfix
3420 - Replace most http:// URLs in our code and documentation with
3421 https:// URLs. (We have left unchanged the code in src/ext/, and
3422 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
3425 - Our "check-local" test target no longer tries to use the
3426 Coccinelle semantic patching tool parse all the C files. While it
3427 is a good idea to try to make sure Coccinelle works on our C
3428 before we run a Coccinelle patch, doing so on every test run has
3429 proven to be disruptive. You can still run this tool manually with
3430 "make check-cocci". Closes ticket 40030.
3433 Changes in version 0.3.5.11 - 2020-07-09
3434 Tor 0.3.5.11 backports fixes from later tor releases, including several
3435 usability, portability, and reliability fixes.
3437 This release also fixes TROVE-2020-001, a medium-severity denial of
3438 service vulnerability affecting all versions of Tor when compiled with
3439 the NSS encryption library. (This is not the default configuration.)
3440 Using this vulnerability, an attacker could cause an affected Tor
3441 instance to crash remotely. This issue is also tracked as CVE-2020-
3442 15572. Anybody running a version of Tor built with the NSS library
3443 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3446 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3447 - Fix a crash due to an out-of-bound memory access when Tor is
3448 compiled with NSS support. Fixes bug 33119; bugfix on
3449 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3452 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3453 - Fix a bug that was preventing DoS defenses from running on bridges
3454 with a pluggable transport. Previously, the DoS subsystem was not
3455 given the transport name of the client connection, thus failed to
3456 find the GeoIP cache entry for that client address. Fixes bug
3457 33491; bugfix on 0.3.3.2-alpha.
3459 o Minor features (testing, backport from 0.4.3.4-rc):
3460 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3461 variable to specify a list of space-separated test cases that
3462 should not be executed. We will use this to disable certain tests
3463 that are failing on Appveyor because of mismatched OpenSSL
3464 libraries. Part of ticket 33643.
3466 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3467 - Use the correct 64-bit printf format when compiling with MINGW on
3468 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3470 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3471 - Warn if the ContactInfo field is not set, and tell the relay
3472 operator that not having a ContactInfo field set might cause their
3473 relay to get rejected in the future. Fixes bug 33361; bugfix
3476 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3477 - Resume use of preemptively-built circuits when UseEntryGuards is set
3478 to 0. We accidentally disabled this feature with that config
3479 setting, leading to slower load times. Fixes bug 34303; bugfix
3482 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3483 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3484 style "/* falls through */" comments. Both Clang and GCC allow
3485 __attribute__((fallthrough)) instead, so that's what we're using
3486 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3488 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3489 - Fix a compiler warning on platforms with 32-bit time_t values.
3490 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3492 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3493 - When starting Tor any time after the first time in a process,
3494 register the thread in which it is running as the main thread.
3495 Previously, we only did this on Windows, which could lead to bugs
3496 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3499 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3500 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3501 if we are not running on Windows. Previously, non-Windows hosts
3502 would reject these line-endings in certain positions, making
3503 certain key files hard to move from one host to another. Fixes bug
3504 33032; bugfix on 0.3.5.1-alpha.
3506 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3507 - Downgrade a noisy log message that could occur naturally when
3508 receiving an extrainfo document that we no longer want. Fixes bug
3509 16016; bugfix on 0.2.6.3-alpha.
3511 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3512 - Remove a BUG() warning that would cause a stack trace if an onion
3513 service descriptor was freed while we were waiting for a
3514 rendezvous circuit to complete. Fixes bug 28992; bugfix
3517 o Testing (CI, backport from 0.4.3.4-rc):
3518 - In our Appveyor Windows CI, copy required DLLs to test and app
3519 directories, before running tor's tests. This ensures that tor.exe
3520 and test*.exe use the correct version of each DLL. This fix is not
3521 required, but we hope it will avoid DLL search issues in future.
3522 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3523 - On Appveyor, skip the crypto/openssl_version test, which is
3524 failing because of a mismatched library installation. Fix
3528 Changes in version 0.4.2.8 - 2020-07-09
3529 Tor 0.4.2.8 backports various fixes from later releases, including
3530 several that affect usability and portability.
3532 This release also fixes TROVE-2020-001, a medium-severity denial of
3533 service vulnerability affecting all versions of Tor when compiled with
3534 the NSS encryption library. (This is not the default configuration.)
3535 Using this vulnerability, an attacker could cause an affected Tor
3536 instance to crash remotely. This issue is also tracked as CVE-2020-
3537 15572. Anybody running a version of Tor built with the NSS library
3538 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3541 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3542 - Fix a crash due to an out-of-bound memory access when Tor is
3543 compiled with NSS support. Fixes bug 33119; bugfix on
3544 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3547 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3548 - Fix a bug that was preventing DoS defenses from running on bridges
3549 with a pluggable transport. Previously, the DoS subsystem was not
3550 given the transport name of the client connection, thus failed to
3551 find the GeoIP cache entry for that client address. Fixes bug
3552 33491; bugfix on 0.3.3.2-alpha.
3554 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
3555 - Default to sending SENDME version 1 cells. (Clients are already
3556 sending these, because of a consensus parameter telling them to do
3557 so: this change only affects what clients would do if the
3558 consensus didn't contain a recommendation.) Closes ticket 33623.
3560 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
3561 - Improve assertions and add some memory-poisoning code to try to
3562 track down possible causes of a rare crash (32564) in the EWMA
3563 code. Closes ticket 33290.
3565 o Minor features (testing, backport from 0.4.3.4-rc):
3566 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3567 variable to specify a list of space-separated test cases that
3568 should not be executed. We will use this to disable certain tests
3569 that are failing on Appveyor because of mismatched OpenSSL
3570 libraries. Part of ticket 33643.
3572 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3573 - Use the correct 64-bit printf format when compiling with MINGW on
3574 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3576 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3577 - Warn if the ContactInfo field is not set, and tell the relay
3578 operator that not having a ContactInfo field set might cause their
3579 relay to get rejected in the future. Fixes bug 33361; bugfix
3582 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3583 - Resume use of preemptively-built circuits when UseEntryGuards is set
3584 to 0. We accidentally disabled this feature with that config
3585 setting, leading to slower load times. Fixes bug 34303; bugfix
3588 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3589 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3590 style "/* falls through */" comments. Both Clang and GCC allow
3591 __attribute__((fallthrough)) instead, so that's what we're using
3592 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3593 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3596 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3597 - Fix a compiler warning on platforms with 32-bit time_t values.
3598 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3600 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
3601 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3602 report them as SIGNAL events. Previously we would log a bug
3603 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3605 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3606 - When starting Tor any time after the first time in a process,
3607 register the thread in which it is running as the main thread.
3608 Previously, we only did this on Windows, which could lead to bugs
3609 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3612 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3613 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3614 if we are not running on Windows. Previously, non-Windows hosts
3615 would reject these line-endings in certain positions, making
3616 certain key files hard to move from one host to another. Fixes bug
3617 33032; bugfix on 0.3.5.1-alpha.
3619 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
3620 - When logging a bug, do not say "Future instances of this warning
3621 will be silenced" unless we are actually going to silence them.
3622 Previously we would say this whenever a BUG() check failed in the
3623 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3625 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
3626 - Flush stderr, stdout, and file logs during shutdown, if supported
3627 by the OS. This change helps make sure that any final logs are
3628 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3630 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3631 - Downgrade a noisy log message that could occur naturally when
3632 receiving an extrainfo document that we no longer want. Fixes bug
3633 16016; bugfix on 0.2.6.3-alpha.
3635 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3636 - Remove a BUG() warning that would cause a stack trace if an onion
3637 service descriptor was freed while we were waiting for a
3638 rendezvous circuit to complete. Fixes bug 28992; bugfix
3641 o Testing (CI, backport from 0.4.3.4-rc):
3642 - In our Appveyor Windows CI, copy required DLLs to test and app
3643 directories, before running tor's tests. This ensures that tor.exe
3644 and test*.exe use the correct version of each DLL. This fix is not
3645 required, but we hope it will avoid DLL search issues in future.
3646 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3647 - On Appveyor, skip the crypto/openssl_version test, which is
3648 failing because of a mismatched library installation. Fix
3652 Changes in version 0.4.3.6 - 2020-07-09
3653 Tor 0.4.3.6 backports several bugfixes from later releases, including
3654 some affecting usability.
3656 This release also fixes TROVE-2020-001, a medium-severity denial of
3657 service vulnerability affecting all versions of Tor when compiled with
3658 the NSS encryption library. (This is not the default configuration.)
3659 Using this vulnerability, an attacker could cause an affected Tor
3660 instance to crash remotely. This issue is also tracked as CVE-2020-
3661 15572. Anybody running a version of Tor built with the NSS library
3662 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3665 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3666 - Fix a crash due to an out-of-bound memory access when Tor is
3667 compiled with NSS support. Fixes bug 33119; bugfix on
3668 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3671 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3672 - Use the correct 64-bit printf format when compiling with MINGW on
3673 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3675 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3676 - Resume use of preemptively-built circuits when UseEntryGuards is set
3677 to 0. We accidentally disabled this feature with that config
3678 setting, leading to slower load times. Fixes bug 34303; bugfix
3681 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3682 - Fix a compiler warning on platforms with 32-bit time_t values.
3683 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3685 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
3686 - Fix a startup crash when tor is compiled with --enable-nss and
3687 sandbox support is enabled. Fixes bug 34130; bugfix on
3688 0.3.5.1-alpha. Patch by Daniel Pinto.
3690 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3691 - Downgrade a noisy log message that could occur naturally when
3692 receiving an extrainfo document that we no longer want. Fixes bug
3693 16016; bugfix on 0.2.6.3-alpha.
3695 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
3696 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3697 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3699 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
3700 - Prevent an assert() that would occur when cleaning the client
3701 descriptor cache, and attempting to close circuits for a non-
3702 decrypted descriptor (lacking client authorization). Fixes bug
3703 33458; bugfix on 0.4.2.1-alpha.
3705 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
3706 - Fix a portability error in the configure script, where we were
3707 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3709 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3710 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3711 descriptors, when the IPv6 port was configured as "auto". Fixes
3712 bug 32588; bugfix on 0.2.3.9-alpha.
3714 o Documentation (backport from 0.4.4.1-alpha):
3715 - Fix several doxygen warnings related to imbalanced groups. Closes
3719 Changes in version 0.4.4.2-alpha - 2020-07-09
3720 This is the second alpha release in the 0.4.4.x series. It fixes a few
3721 bugs in the previous release, and solves a few usability,
3722 compatibility, and portability issues.
3724 This release also fixes TROVE-2020-001, a medium-severity denial of
3725 service vulnerability affecting all versions of Tor when compiled with
3726 the NSS encryption library. (This is not the default configuration.)
3727 Using this vulnerability, an attacker could cause an affected Tor
3728 instance to crash remotely. This issue is also tracked as CVE-2020-
3729 15572. Anybody running a version of Tor built with the NSS library
3730 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3733 o Major bugfixes (NSS, security):
3734 - Fix a crash due to an out-of-bound memory access when Tor is
3735 compiled with NSS support. Fixes bug 33119; bugfix on
3736 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3739 o Minor features (bootstrap reporting):
3740 - Report more detailed reasons for bootstrap failure when the
3741 failure happens due to a TLS error. Previously we would just call
3742 these errors "MISC" when they happened during read, and "DONE"
3743 when they happened during any other TLS operation. Closes
3746 o Minor features (directory authority):
3747 - Authorities now recommend the protocol versions that are supported
3748 by Tor 0.3.5 and later. (Earlier versions of Tor have been
3749 deprecated since January of this year.) This recommendation will
3750 cause older clients and relays to give a warning on startup, or
3751 when they download a consensus directory. Closes ticket 32696.
3753 o Minor features (entry guards):
3754 - Reinstate support for GUARD NEW/UP/DOWN control port events.
3755 Closes ticket 40001.
3757 o Minor features (linux seccomp2 sandbox, portability):
3758 - Allow Tor to build on platforms where it doesn't know how to
3759 report which syscall caused the linux seccomp2 sandbox to fail.
3760 This change should make the sandbox code more portable to less
3761 common Linux architectures. Closes ticket 34382.
3762 - Permit the unlinkat() syscall, which some Libc implementations use
3763 to implement unlink(). Closes ticket 33346.
3765 o Minor bugfix (CI, Windows):
3766 - Use the correct 64-bit printf format when compiling with MINGW on
3767 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3769 o Minor bugfix (onion service v3 client):
3770 - Remove a BUG() warning that could occur naturally. Fixes bug
3771 34087; bugfix on 0.3.2.1-alpha.
3773 o Minor bugfix (SOCKS, onion service client):
3774 - Detect v3 onion service addresses of the wrong length when
3775 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
3778 o Minor bugfixes (compiler warnings):
3779 - Fix a compiler warning on platforms with 32-bit time_t values.
3780 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3782 o Minor bugfixes (control port, onion service):
3783 - Consistently use 'address' in "Invalid v3 address" response to
3784 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
3785 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
3787 o Minor bugfixes (logging):
3788 - Downgrade a noisy log message that could occur naturally when
3789 receiving an extrainfo document that we no longer want. Fixes bug
3790 16016; bugfix on 0.2.6.3-alpha.
3792 o Minor bugfixes (onion services v3):
3793 - Avoid a non-fatal assertion failure in certain edge-cases when
3794 opening an intro circuit as a client. Fixes bug 34084; bugfix
3797 o Deprecated features (onion service v2):
3798 - Add a deprecation warning for version 2 onion services. Closes
3801 o Removed features (IPv6, revert):
3802 - Revert the change in the default value of ClientPreferIPv6OrPort:
3803 it breaks the torsocks use case. The SOCKS resolve command has no
3804 mechanism to ask for a specific address family (v4 or v6), and so
3805 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
3806 interface resulted in a failure. Tor Browser explicitly sets
3807 PreferIPv6, so this should not affect the majority of our users.
3808 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
3811 Changes in version 0.4.4.1-alpha - 2020-06-16
3812 This is the first alpha release in the 0.4.4.x series. It improves
3813 our guard selection algorithms, improves the amount of code that
3814 can be disabled when running without relay support, and includes numerous
3815 small bugfixes and enhancements. It also lays the ground for some IPv6
3816 features that we'll be developing more in the next (0.4.5) series.
3818 Here are the changes since 0.4.3.5.
3820 o Major features (Proposal 310, performance + security):
3821 - Implements Proposal 310, "Bandaid on guard selection". Proposal
3822 310 solves load-balancing issues with older versions of the guard
3823 selection algorithm, and improves its security. Under this new
3824 algorithm, a newly selected guard never becomes Primary unless all
3825 previously sampled guards are unreachable. Implements
3826 recommendation from 32088. (Proposal 310 is linked to the CLAPS
3827 project researching optimal client location-aware path selections.
3828 This project is a collaboration between the UCLouvain Crypto Group,
3829 the U.S. Naval Research Laboratory, and Princeton University.)
3831 o Major features (IPv6, relay):
3832 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
3833 warning if the IPv4 or IPv6 address is an internal address, and
3834 internal addresses are not allowed. But continue to use the other
3835 address, if it is valid. Closes ticket 33817.
3836 - If a relay can extend over IPv4 and IPv6, and both addresses are
3837 provided, it chooses between them uniformly at random. Closes
3839 - Re-use existing IPv6 connections for circuit extends. Closes
3841 - Relays may extend circuits over IPv6, if the relay has an IPv6
3842 ORPort, and the client supplies the other relay's IPv6 ORPort in
3843 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
3844 ORPort self-tests in 33222. Closes ticket 33817.
3846 o Major features (v3 onion services):
3847 - Allow v3 onion services to act as OnionBalance backend instances,
3848 by using the HiddenServiceOnionBalanceInstance torrc option.
3849 Closes ticket 32709.
3851 o Minor feature (developer tools):
3852 - Add a script to help check the alphabetical ordering of option
3853 names in the manual page. Closes ticket 33339.
3855 o Minor feature (onion service client, SOCKS5):
3856 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
3857 new type of onion service connection failures. The semantics of
3858 these error codes are documented in proposal 309. Closes
3861 o Minor feature (onion service v3):
3862 - If a service cannot upload its descriptor(s), log why at INFO
3863 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
3865 o Minor feature (python scripts):
3866 - Stop assuming that /usr/bin/python exists. Instead of using a
3867 hardcoded path in scripts that still use Python 2, use
3868 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
3869 bug 33192; bugfix on 0.4.2.
3871 o Minor features (client-only compilation):
3872 - Disable more code related to the ext_orport protocol when
3873 compiling without support for relay mode. Closes ticket 33368.
3874 - Disable more of our self-testing code when support for relay mode
3875 is disabled. Closes ticket 33370.
3877 o Minor features (code safety):
3878 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
3879 functions in DNS and IP address processing code, and adjust
3880 codepaths to make them less likely to crash entire Tor instances.
3881 Resolves issue 33788.
3883 o Minor features (compilation size):
3884 - Most server-side DNS code is now disabled when building without
3885 support for relay mode. Closes ticket 33366.
3887 o Minor features (continuous integration):
3888 - Run unit-test and integration test (Stem, Chutney) jobs with
3889 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
3890 Resolves ticket 32143.
3892 o Minor features (control port):
3893 - Return a descriptive error message from the 'GETINFO status/fresh-
3894 relay-descs' command on the control port. Previously, we returned
3895 a generic error of "Error generating descriptor". Closes ticket
3896 32873. Patch by Neel Chauhan.
3898 o Minor features (developer tooling):
3899 - Refrain from listing all .a files that are generated by the Tor
3900 build in .gitignore. Add a single wildcard *.a entry that covers
3901 all of them for present and future. Closes ticket 33642.
3902 - Add a script ("git-install-tools.sh") to install git hooks and
3903 helper scripts. Closes ticket 33451.
3905 o Minor features (directory authority, shared random):
3906 - Refactor more authority-only parts of the shared-random scheduling
3907 code to reside in the dirauth module, and to be disabled when
3908 compiling with --disable-module-dirauth. Closes ticket 33436.
3910 o Minor features (directory):
3911 - Remember the number of bytes we have downloaded for each directory
3912 purpose while bootstrapping, and while fully bootstrapped. Log
3913 this information as part of the heartbeat message. Closes
3916 o Minor features (IPv6 support):
3917 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
3918 changes and tor_addr_is_null(). Closes ticket 33679. Patch
3920 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
3921 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
3922 Closes ticket 33901.
3924 o Minor features (logging):
3925 - When trying to find our own address, add debug-level logging to
3926 report the sources of candidate addresses. Closes ticket 32888.
3928 o Minor features (testing, architecture):
3929 - Our test scripts now double-check that subsystem initialization
3930 order is consistent with the inter-module dependencies established
3931 by our .may_include files. Implements ticket 31634.
3932 - Initialize all subsystems at the beginning of our unit test
3933 harness, to avoid crashes due to uninitialized subsystems. Follow-
3934 up from ticket 33316.
3936 o Minor features (v3 onion services):
3937 - Add v3 onion service status to the dumpstats() call which is
3938 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
3939 services. Closes ticket 24844. Patch by Neel Chauhan.
3941 o Minor features (windows):
3942 - Add support for console control signals like Ctrl+C in Windows.
3943 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
3945 o Minor bugfix (onion service v3):
3946 - Prevent an assert() that would occur when cleaning the client
3947 descriptor cache, and attempting to close circuits for a non-
3948 decrypted descriptor (lacking client authorization). Fixes bug
3949 33458; bugfix on 0.4.2.1-alpha.
3951 o Minor bugfix (refactoring):
3952 - Lift circuit_build_times_disabled() out of the
3953 circuit_expire_building() loop, to save CPU time when there are
3954 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
3956 o Minor bugfixes (client performance):
3957 - Resume use of preemptively-built circuits when UseEntryGuards is set
3958 to 0. We accidentally disabled this feature with that config
3959 setting, leading to slower load times. Fixes bug 34303; bugfix
3962 o Minor bugfixes (directory authorities):
3963 - Directory authorities now reject votes that arrive too late. In
3964 particular, once an authority has started fetching missing votes,
3965 it no longer accepts new votes posted by other authorities. This
3966 change helps prevent a consensus split, where only some authorities
3967 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
3969 o Minor bugfixes (git scripts):
3970 - Stop executing the checked-out pre-commit hook from the pre-push
3971 hook. Instead, execute the copy in the user's git directory. Fixes
3972 bug 33284; bugfix on 0.4.1.1-alpha.
3974 o Minor bugfixes (initialization):
3975 - Initialize the subsystems in our code in an order more closely
3976 corresponding to their dependencies, so that every system is
3977 initialized before the ones that (theoretically) depend on it.
3978 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
3980 o Minor bugfixes (IPv4, relay):
3981 - Check for invalid zero IPv4 addresses and ports when sending and
3982 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
3984 o Minor bugfixes (IPv6, relay):
3985 - Consider IPv6 addresses when checking if a connection is
3986 canonical. In 17604, relays assumed that a remote relay could
3987 consider an IPv6 connection canonical, but did not set the
3988 canonical flag on their side of the connection. Fixes bug 33899;
3989 bugfix on 0.3.1.1-alpha.
3990 - Log IPv6 addresses on connections where this relay is the
3991 responder. Previously, responding relays would replace the remote
3992 IPv6 address with the IPv4 address from the consensus. Fixes bug
3993 33899; bugfix on 0.3.1.1-alpha.
3995 o Minor bugfixes (linux seccomp sandbox nss):
3996 - Fix a startup crash when tor is compiled with --enable-nss and
3997 sandbox support is enabled. Fixes bug 34130; bugfix on
3998 0.3.5.1-alpha. Patch by Daniel Pinto.
4000 o Minor bugfixes (logging, testing):
4001 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
4002 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
4003 used to log a non-fatal warning, regardless of the debugging
4004 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
4006 o Minor bugfixes (logs):
4007 - Remove surprising empty line in the INFO-level log about circuit
4008 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
4010 o Minor bugfixes (mainloop):
4011 - Better guard against growing a buffer past its maximum 2GB in
4012 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
4014 o Minor bugfixes (manual page):
4015 - Update the man page to reflect that MinUptimeHidServDirectoryV2
4016 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
4018 o Minor bugfixes (onion service v3, client):
4019 - Remove a BUG() that was causing a stacktrace when a descriptor
4020 changed at an unexpected time. Fixes bug 28992; bugfix
4023 o Minor bugfixes (onion service, logging):
4024 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
4025 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
4027 o Minor bugfixes (portability):
4028 - Fix a portability error in the configure script, where we were
4029 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
4031 o Minor bugfixes (protocol versions):
4032 - Sort tor's supported protocol version lists, as recommended by the
4033 tor directory specification. Fixes bug 33285; bugfix
4036 o Minor bugfixes (relays):
4037 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
4038 descriptors, when the IPv6 port was configured as "auto". Fixes
4039 bug 32588; bugfix on 0.2.3.9-alpha.
4041 o Code simplification and refactoring:
4042 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
4043 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
4044 brackets, separating colon, and port number. Closes ticket 33956.
4045 Patch by Neel Chauhan.
4046 - Merge the orconn and ocirc events into the "core" subsystem, which
4047 manages or connections and origin circuits. Previously they were
4048 isolated in subsystems of their own.
4049 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
4050 inversion. Closes ticket 33633.
4051 - Move the circuit extend code to the relay module. Split the
4052 circuit extend function into smaller functions. Closes
4054 - Rewrite port_parse_config() to use the default port flags from
4055 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
4056 - Updated comments in 'scheduler.c' to reflect old code changes, and
4057 simplified the scheduler channel state change code. Closes
4061 - Document the limitations of using %include on config files with
4062 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
4063 0.3.1.1-alpha. Patch by Daniel Pinto.
4064 - Fix several doxygen warnings related to imbalanced groups. Closes
4068 - Remove the ClientAutoIPv6ORPort option. This option attempted to
4069 randomly choose between IPv4 and IPv6 for client connections, and
4070 wasn't a true implementation of Happy Eyeballs. Often, this option
4071 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
4072 Patch by Neel Chauhan.
4073 - Stop shipping contrib/dist/rc.subr file, as it is not being used
4074 on FreeBSD anymore. Closes issue 31576.
4077 - Add a basic IPv6 test to "make test-network". This test only runs
4078 when the local machine has an IPv6 stack. Closes ticket 33300.
4079 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
4080 These jobs run the IPv4-only and dual-stack chutney flavours from
4081 test-network-all. Closes ticket 33280.
4082 - Remove a redundant distcheck job. Closes ticket 33194.
4083 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
4084 chutney job. This job runs on macOS, so it's a bit slow. Closes
4086 - Sort the Travis jobs in order of speed. Putting the slowest jobs
4087 first takes full advantage of Travis job concurrency. Closes
4089 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4090 previously configured to fast_finish (which requires
4091 allow_failure), to speed up the build. Closes ticket 33195.
4092 - Test v3 onion services to tor's mixed IPv4 chutney network. And
4093 add a mixed IPv6 chutney network. These networks are used in the
4094 test-network-all, test-network-ipv4, and test-network-ipv6 make
4095 targets. Closes ticket 33334.
4096 - Use the "bridges+hs-v23" chutney network flavour in "make test-
4097 network". This test requires a recent version of chutney (mid-
4098 February 2020). Closes ticket 28208.
4099 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4100 tool to produce detailed diagnostic output. Closes ticket 32792.
4102 o Code simplification and refactoring (onion service):
4103 - Refactor configuration parsing to use the new config subsystem
4104 code. Closes ticket 33014.
4106 o Code simplification and refactoring (relay address):
4107 - Move a series of functions related to address resolving into their
4108 own files. Closes ticket 33789.
4110 o Documentation (manual page):
4111 - Add cross reference links and a table of contents to the HTML tor
4112 manual page. Closes ticket 33369. Work by Swati Thacker as part of
4113 Google Season of Docs.
4114 - Alphabetize the Denial of Service Mitigation Options, Directory
4115 Authority Server Options, Hidden Service Options, and Testing
4116 Network Options sections of the tor(1) manual page. Closes ticket
4117 33275. Work by Swati Thacker as part of Google Season of Docs.
4118 - Refrain from mentioning nicknames in manpage section for MyFamily
4119 torrc option. Resolves issue 33417.
4120 - Updated the options set by TestingTorNetwork in the manual page.
4121 Closes ticket 33778.
4124 Changes in version 0.4.3.5 - 2020-05-15
4125 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
4126 series adds support for building without relay code enabled, and
4127 implements functionality needed for OnionBalance with v3 onion
4128 services. It includes significant refactoring of our configuration and
4129 controller functionality, and fixes numerous smaller bugs and
4132 Per our support policy, we support each stable release series for nine
4133 months after its first stable release, or three months after the first
4134 stable release of the next series: whichever is longer. This means
4135 that 0.4.3.x will be supported until around February 2021--later, if
4136 0.4.4.x is later than anticipated.
4138 Note also that support for 0.4.1.x is about to end on May 20 of this
4139 year; 0.4.2.x will be supported until September 15. We still plan to
4140 continue supporting 0.3.5.x, our long-term stable series, until
4143 Below are the changes since 0.4.3.4-rc. For a complete list of changes
4144 since 0.4.2.6, see the ReleaseNotes file.
4146 o Minor bugfixes (compiler compatibility):
4147 - Avoid compiler warnings from Clang 10 related to the use of GCC-
4148 style "/* falls through */" comments. Both Clang and GCC allow
4149 __attribute__((fallthrough)) instead, so that's what we're using
4150 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
4151 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
4154 o Minor bugfixes (logging):
4155 - Stop truncating IPv6 addresses and ports in channel and connection
4156 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
4157 - Fix a logic error in a log message about whether an address was
4158 invalid. Previously, the code would never report that onion
4159 addresses were onion addresses. Fixes bug 34131; bugfix
4163 Changes in version 0.4.3.4-rc - 2020-04-13
4164 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
4165 several bugs from earlier versions, including one affecting DoS
4166 defenses on bridges using pluggable transports.
4168 o Major bugfixes (DoS defenses, bridges, pluggable transport):
4169 - Fix a bug that was preventing DoS defenses from running on bridges
4170 with a pluggable transport. Previously, the DoS subsystem was not
4171 given the transport name of the client connection, thus failed to
4172 find the GeoIP cache entry for that client address. Fixes bug
4173 33491; bugfix on 0.3.3.2-alpha.
4175 o Minor feature (sendme, flow control):
4176 - Default to sending SENDME version 1 cells. (Clients are already
4177 sending these, because of a consensus parameter telling them to do
4178 so: this change only affects what clients would do if the
4179 consensus didn't contain a recommendation.) Closes ticket 33623.
4181 o Minor features (testing):
4182 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
4183 variable to specify a list of space-separated test cases that
4184 should not be executed. We will use this to disable certain tests
4185 that are failing on Appveyor because of mismatched OpenSSL
4186 libraries. Part of ticket 33643.
4188 o Minor bugfixes (--disable-module-relay):
4189 - Fix an assertion failure when Tor is built without the relay
4190 module, and then invoked with the "User" option. Fixes bug 33668;
4191 bugfix on 0.4.3.1-alpha.
4193 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
4194 - Set some output arguments in the relay and dirauth module stubs,
4195 to guard against future stub argument handling bugs like 33668.
4196 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
4198 o Minor bugfixes (build system):
4199 - Correctly output the enabled module in the configure summary.
4200 Before that, the list shown was just plain wrong. Fixes bug 33646;
4201 bugfix on 0.4.3.2-alpha.
4203 o Minor bugfixes (client, IPv6):
4204 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
4205 Instead, prefer IPv6 connections by default, but allow users to
4206 change their configs using the "NoPreferIPv6" port flag. Fixes bug
4207 33608; bugfix on 0.4.3.1-alpha.
4208 - Revert PreferIPv6 set by default on the SocksPort because it broke
4209 the torsocks use case. Tor doesn't have a way for an application
4210 to request the hostname to be resolved for a specific IP version,
4211 but torsocks requires that. Up until now, IPv4 was used by default
4212 so torsocks is expecting that, and can't handle a possible IPv6
4213 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
4215 o Minor bugfixes (key portability):
4216 - When reading PEM-encoded key data, tolerate CRLF line-endings even
4217 if we are not running on Windows. Previously, non-Windows hosts
4218 would reject these line-endings in certain positions, making
4219 certain key files hard to move from one host to another. Fixes bug
4220 33032; bugfix on 0.3.5.1-alpha.
4222 o Minor bugfixes (logging):
4223 - Flush stderr, stdout, and file logs during shutdown, if supported
4224 by the OS. This change helps make sure that any final logs are
4225 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
4226 - Stop closing stderr and stdout during shutdown. Closing these file
4227 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
4230 o Minor bugfixes (onion services v3):
4231 - Relax severity of a log message that can appear naturally when
4232 decoding onion service descriptors as a relay. Also add some
4233 diagnostics to debug any future bugs in that area. Fixes bug
4234 31669; bugfix on 0.3.0.1-alpha.
4235 - Block a client-side assertion by disallowing the registration of
4236 an x25519 client auth key that's all zeroes. Fixes bug 33545;
4237 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
4239 o Code simplification and refactoring:
4240 - Disable our coding standards best practices tracker in our git
4241 hooks. (0.4.3 branches only.) Closes ticket 33678.
4244 - Avoid conflicts between the fake sockets in tor's unit tests, and
4245 real file descriptors. Resolves issues running unit tests with
4246 GitHub Actions, where the process that embeds or launches the
4247 tests has already opened a large number of file descriptors. Fixes
4248 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
4252 - In our Appveyor Windows CI, copy required DLLs to test and app
4253 directories, before running tor's tests. This ensures that tor.exe
4254 and test*.exe use the correct version of each DLL. This fix is not
4255 required, but we hope it will avoid DLL search issues in future.
4256 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
4257 - On Appveyor, skip the crypto/openssl_version test, which is
4258 failing because of a mismatched library installation. Fix
4262 Changes in version 0.4.3.3-alpha - 2020-03-18
4263 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
4264 TROVE-2020-002, a major denial-of-service vulnerability that affected
4265 all released Tor instances since 0.2.1.5-alpha. Using this
4266 vulnerability, an attacker could cause Tor instances to consume a huge
4267 amount of CPU, disrupting their operations for several seconds or
4268 minutes. This attack could be launched by anybody against a relay, or
4269 by a directory cache against any client that had connected to it. The
4270 attacker could launch this attack as much as they wanted, thereby
4271 disrupting service or creating patterns that could aid in traffic
4272 analysis. This issue was found by OSS-Fuzz, and is also tracked
4275 We do not have reason to believe that this attack is currently being
4276 exploited in the wild, but nonetheless we advise everyone to upgrade
4277 as soon as packages are available.
4279 o Major bugfixes (security, denial-of-service):
4280 - Fix a denial-of-service bug that could be used by anyone to
4281 consume a bunch of CPU on any Tor relay or authority, or by
4282 directories to consume a bunch of CPU on clients or hidden
4283 services. Because of the potential for CPU consumption to
4284 introduce observable timing patterns, we are treating this as a
4285 high-severity security issue. Fixes bug 33119; bugfix on
4286 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4287 as TROVE-2020-002 and CVE-2020-10592.
4289 o Major bugfixes (circuit padding, memory leak):
4290 - Avoid a remotely triggered memory leak in the case that a circuit
4291 padding machine is somehow negotiated twice on the same circuit.
4292 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4293 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4295 o Major bugfixes (directory authority):
4296 - Directory authorities will now send a 503 (not enough bandwidth)
4297 code to clients when under bandwidth pressure. Known relays and
4298 other authorities will always be answered regardless of the
4299 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
4301 o Minor features (diagnostic):
4302 - Improve assertions and add some memory-poisoning code to try to
4303 track down possible causes of a rare crash (32564) in the EWMA
4304 code. Closes ticket 33290.
4306 o Minor features (directory authorities):
4307 - Directory authorities now reject descriptors from relays running
4308 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
4309 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
4311 o Minor features (usability):
4312 - Include more information when failing to parse a configuration
4313 value. This should make it easier to tell what's going wrong when
4314 a configuration file doesn't parse. Closes ticket 33460.
4316 o Minor bugfix (relay, configuration):
4317 - Warn if the ContactInfo field is not set, and tell the relay
4318 operator that not having a ContactInfo field set might cause their
4319 relay to get rejected in the future. Fixes bug 33361; bugfix
4322 o Minor bugfixes (coding best practices checks):
4323 - Allow the "practracker" script to read unicode files when using
4324 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
4325 but didn't change the codec for opening files. Fixes bug 33374;
4326 bugfix on 0.4.3.1-alpha.
4328 o Minor bugfixes (continuous integration):
4329 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
4332 o Minor bugfixes (onion service v3, client):
4333 - Remove a BUG() warning that would cause a stack trace if an onion
4334 service descriptor was freed while we were waiting for a
4335 rendezvous circuit to complete. Fixes bug 28992; bugfix
4338 o Minor bugfixes (onion services v3):
4339 - Fix an assertion failure that could result from a corrupted
4340 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4341 bugfix on 0.3.3.1-alpha. This issue is also tracked
4344 o Documentation (manpage):
4345 - Alphabetize the Server and Directory server sections of the tor
4346 manpage. Also split Statistics options into their own section of
4347 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
4348 Google Season of Docs.
4349 - Document the __OwningControllerProcess torrc option and specify
4350 its polling interval. Resolves issue 32971.
4352 o Testing (Travis CI):
4353 - Remove a redundant distcheck job. Closes ticket 33194.
4354 - Sort the Travis jobs in order of speed: putting the slowest jobs
4355 first takes full advantage of Travis job concurrency. Closes
4357 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4358 previously configured to fast_finish (which requires
4359 allow_failure), to speed up the build. Closes ticket 33195.
4360 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4361 tool to produce detailed diagnostic output. Closes ticket 32792.
4364 Changes in version 0.4.2.7 - 2020-03-18
4365 This is the third stable release in the 0.4.2.x series. It backports
4366 numerous fixes from later releases, including a fix for TROVE-2020-
4367 002, a major denial-of-service vulnerability that affected all
4368 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
4369 an attacker could cause Tor instances to consume a huge amount of CPU,
4370 disrupting their operations for several seconds or minutes. This
4371 attack could be launched by anybody against a relay, or by a directory
4372 cache against any client that had connected to it. The attacker could
4373 launch this attack as much as they wanted, thereby disrupting service
4374 or creating patterns that could aid in traffic analysis. This issue
4375 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
4377 We do not have reason to believe that this attack is currently being
4378 exploited in the wild, but nonetheless we advise everyone to upgrade
4379 as soon as packages are available.
4381 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4382 - Fix a denial-of-service bug that could be used by anyone to
4383 consume a bunch of CPU on any Tor relay or authority, or by
4384 directories to consume a bunch of CPU on clients or hidden
4385 services. Because of the potential for CPU consumption to
4386 introduce observable timing patterns, we are treating this as a
4387 high-severity security issue. Fixes bug 33119; bugfix on
4388 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4389 as TROVE-2020-002 and CVE-2020-10592.
4391 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4392 - Avoid a remotely triggered memory leak in the case that a circuit
4393 padding machine is somehow negotiated twice on the same circuit.
4394 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4395 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4397 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
4398 - Directory authorities will now send a 503 (not enough bandwidth)
4399 code to clients when under bandwidth pressure. Known relays and
4400 other authorities will always be answered regardless of the
4401 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
4403 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4404 - Stop allowing failures on the Travis CI stem tests job. It looks
4405 like all the stem hangs we were seeing before are now fixed.
4406 Closes ticket 33075.
4408 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4409 - Lowercase the configured value of BridgeDistribution before adding
4410 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4412 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4413 - If we encounter a bug when flushing a buffer to a TLS connection,
4414 only log the bug once per invocation of the Tor process.
4415 Previously we would log with every occurrence, which could cause
4416 us to run out of disk space. Fixes bug 33093; bugfix
4419 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4420 - Fix an assertion failure that could result from a corrupted
4421 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4422 bugfix on 0.3.3.1-alpha. This issue is also tracked
4425 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4426 - Fix a syntax warning given by newer versions of Rust that was
4427 creating problems for our continuous integration. Fixes bug 33212;
4428 bugfix on 0.3.5.1-alpha.
4430 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4431 - Remove a redundant distcheck job. Closes ticket 33194.
4432 - Sort the Travis jobs in order of speed: putting the slowest jobs
4433 first takes full advantage of Travis job concurrency. Closes
4435 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4436 previously configured to fast_finish (which requires
4437 allow_failure), to speed up the build. Closes ticket 33195.
4438 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4439 tool to produce detailed diagnostic output. Closes ticket 32792.
4442 Changes in version 0.4.1.9 - 2020-03-18
4443 Tor 0.4.1.9 backports important fixes from later Tor releases,
4444 including a fix for TROVE-2020-002, a major denial-of-service
4445 vulnerability that affected all released Tor instances since
4446 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
4447 instances to consume a huge amount of CPU, disrupting their operations
4448 for several seconds or minutes. This attack could be launched by
4449 anybody against a relay, or by a directory cache against any client
4450 that had connected to it. The attacker could launch this attack as
4451 much as they wanted, thereby disrupting service or creating patterns
4452 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
4453 and is also tracked as CVE-2020-10592.
4455 We do not have reason to believe that this attack is currently being
4456 exploited in the wild, but nonetheless we advise everyone to upgrade
4457 as soon as packages are available.
4459 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4460 - Fix a denial-of-service bug that could be used by anyone to
4461 consume a bunch of CPU on any Tor relay or authority, or by
4462 directories to consume a bunch of CPU on clients or hidden
4463 services. Because of the potential for CPU consumption to
4464 introduce observable timing patterns, we are treating this as a
4465 high-severity security issue. Fixes bug 33119; bugfix on
4466 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4467 as TROVE-2020-002 and CVE-2020-10592.
4469 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4470 - Avoid a remotely triggered memory leak in the case that a circuit
4471 padding machine is somehow negotiated twice on the same circuit.
4472 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4473 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4475 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4476 - Lowercase the configured value of BridgeDistribution before adding
4477 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4479 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4480 - If we encounter a bug when flushing a buffer to a TLS connection,
4481 only log the bug once per invocation of the Tor process.
4482 Previously we would log with every occurrence, which could cause
4483 us to run out of disk space. Fixes bug 33093; bugfix
4486 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4487 - Fix an assertion failure that could result from a corrupted
4488 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4489 bugfix on 0.3.3.1-alpha. This issue is also tracked
4492 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4493 - Fix a syntax warning given by newer versions of Rust that was
4494 creating problems for our continuous integration. Fixes bug 33212;
4495 bugfix on 0.3.5.1-alpha.
4497 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4498 - Remove a redundant distcheck job. Closes ticket 33194.
4499 - Sort the Travis jobs in order of speed: putting the slowest jobs
4500 first takes full advantage of Travis job concurrency. Closes
4502 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4503 previously configured to fast_finish (which requires
4504 allow_failure), to speed up the build. Closes ticket 33195.
4505 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4506 tool to produce detailed diagnostic output. Closes ticket 32792.
4509 Changes in version 0.3.5.10 - 2020-03-18
4510 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
4511 fix for TROVE-2020-002, a major denial-of-service vulnerability that
4512 affected all released Tor instances since 0.2.1.5-alpha. Using this
4513 vulnerability, an attacker could cause Tor instances to consume a huge
4514 amount of CPU, disrupting their operations for several seconds or
4515 minutes. This attack could be launched by anybody against a relay, or
4516 by a directory cache against any client that had connected to it. The
4517 attacker could launch this attack as much as they wanted, thereby
4518 disrupting service or creating patterns that could aid in traffic
4519 analysis. This issue was found by OSS-Fuzz, and is also tracked
4522 We do not have reason to believe that this attack is currently being
4523 exploited in the wild, but nonetheless we advise everyone to upgrade
4524 as soon as packages are available.
4526 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4527 - Fix a denial-of-service bug that could be used by anyone to
4528 consume a bunch of CPU on any Tor relay or authority, or by
4529 directories to consume a bunch of CPU on clients or hidden
4530 services. Because of the potential for CPU consumption to
4531 introduce observable timing patterns, we are treating this as a
4532 high-severity security issue. Fixes bug 33119; bugfix on
4533 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4534 as TROVE-2020-002 and CVE-2020-10592.
4536 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4537 - Correct how we use libseccomp. Particularly, stop assuming that
4538 rules are applied in a particular order or that more rules are
4539 processed after the first match. Neither is the case! In
4540 libseccomp <2.4.0 this lead to some rules having no effect.
4541 libseccomp 2.4.0 changed how rules are generated, leading to a
4542 different ordering, which in turn led to a fatal crash during
4543 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4546 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4547 - Stop allowing failures on the Travis CI stem tests job. It looks
4548 like all the stem hangs we were seeing before are now fixed.
4549 Closes ticket 33075.
4551 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4552 - Lowercase the configured value of BridgeDistribution before adding
4553 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4555 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
4556 - When running Tor with an option like --verify-config or
4557 --dump-config that does not start the event loop, avoid crashing
4558 if we try to exit early because of an error. Fixes bug 32407;
4559 bugfix on 0.3.3.1-alpha.
4561 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4562 - If we encounter a bug when flushing a buffer to a TLS connection,
4563 only log the bug once per invocation of the Tor process.
4564 Previously we would log with every occurrence, which could cause
4565 us to run out of disk space. Fixes bug 33093; bugfix
4568 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4569 - Fix an assertion failure that could result from a corrupted
4570 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4571 bugfix on 0.3.3.1-alpha. This issue is also tracked
4574 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4575 - Fix a syntax warning given by newer versions of Rust that was
4576 creating problems for our continuous integration. Fixes bug 33212;
4577 bugfix on 0.3.5.1-alpha.
4579 o Testing (backport from 0.4.3.1-alpha):
4580 - Re-enable the Travis CI macOS Chutney build, but don't let it
4581 prevent the Travis job from finishing. (The Travis macOS jobs are
4582 slow, so we don't want to have it delay the whole CI process.)
4583 Closes ticket 32629.
4584 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4585 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4586 fix the sandbox errors in 32722. Closes ticket 32240.
4588 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4589 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4591 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4592 - Remove a redundant distcheck job. Closes ticket 33194.
4593 - Sort the Travis jobs in order of speed: putting the slowest jobs
4594 first takes full advantage of Travis job concurrency. Closes
4596 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4597 previously configured to fast_finish (which requires
4598 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4599 tool to produce detailed diagnostic output. Closes ticket 32792.
4602 Changes in version 0.4.3.2-alpha - 2020-02-10
4603 This is the second stable alpha release in the Tor 0.4.3.x series. It
4604 fixes several bugs present in the previous alpha release. Anybody
4605 running the previous alpha should upgrade, and look for bugs in this
4608 o Major bugfixes (onion service client, authorization):
4609 - On a NEWNYM signal, purge entries from the ephemeral client
4610 authorization cache. The permanent ones are kept. Fixes bug 33139;
4611 bugfix on 0.4.3.1-alpha.
4613 o Minor features (best practices tracker):
4614 - Practracker now supports a --regen-overbroad option to regenerate
4615 the exceptions file, but only to revise exceptions to be _less_
4616 tolerant of best-practices violations. Closes ticket 32372.
4618 o Minor features (continuous integration):
4619 - Run Doxygen Makefile target on Travis, so we can learn about
4620 regressions in our internal documentation. Closes ticket 32455.
4621 - Stop allowing failures on the Travis CI stem tests job. It looks
4622 like all the stem hangs we were seeing before are now fixed.
4623 Closes ticket 33075.
4625 o Minor bugfixes (build system):
4626 - Revise configure options that were either missing or incorrect in
4627 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
4629 o Minor bugfixes (controller protocol):
4630 - Fix a memory leak introduced by refactoring of control reply
4631 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
4632 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
4634 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
4635 report them as SIGNAL events. Previously we would log a bug
4636 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
4638 o Minor bugfixes (logging):
4639 - If we encounter a bug when flushing a buffer to a TLS connection,
4640 only log the bug once per invocation of the Tor process.
4641 Previously we would log with every occurrence, which could cause
4642 us to run out of disk space. Fixes bug 33093; bugfix
4644 - When logging a bug, do not say "Future instances of this warning
4645 will be silenced" unless we are actually going to silence them.
4646 Previously we would say this whenever a BUG() check failed in the
4647 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
4649 o Minor bugfixes (onion service v2):
4650 - Move a series of v2 onion service warnings to protocol-warning
4651 level because they can all be triggered remotely by a malformed
4652 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
4654 o Minor bugfixes (onion service v3, client authorization):
4655 - When removing client authorization credentials using the control
4656 port, also remove the associated descriptor, so the onion service
4657 can no longer be contacted. Fixes bug 33148; bugfix
4660 o Minor bugfixes (pluggable transports):
4661 - When receiving a message on standard error from a pluggable
4662 transport, log it at info level, rather than as a warning. Fixes
4663 bug 33005; bugfix on 0.4.0.1-alpha.
4665 o Minor bugfixes (rust, build):
4666 - Fix a syntax warning given by newer versions of Rust that was
4667 creating problems for our continuous integration. Fixes bug 33212;
4668 bugfix on 0.3.5.1-alpha.
4670 o Minor bugfixes (TLS bug handling):
4671 - When encountering a bug in buf_read_from_tls(), return a "MISC"
4672 error code rather than "WANTWRITE". This change might help avoid
4673 some CPU-wasting loops if the bug is ever triggered. Bug reported
4674 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
4676 o Code simplification and refactoring (mainloop):
4677 - Simplify the ip_address_changed() function by removing redundant
4678 checks. Closes ticket 33091.
4680 o Documentation (manpage):
4681 - Split "Circuit Timeout" options and "Node Selection" options into
4682 their own sections of the tor manpage. Closes tickets 32928 and
4683 32929. Work by Swati Thacker as part of Google Season of Docs.
4686 Changes in version 0.4.2.6 - 2020-01-30
4687 This is the second stable release in the 0.4.2.x series. It backports
4688 several bugfixes from 0.4.3.1-alpha, including some that had affected
4689 the Linux seccomp2 sandbox or Windows services. If you're running with
4690 one of those configurations, you'll probably want to upgrade;
4691 otherwise, you should be fine with 0.4.2.5.
4693 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4694 - Correct how we use libseccomp. Particularly, stop assuming that
4695 rules are applied in a particular order or that more rules are
4696 processed after the first match. Neither is the case! In
4697 libseccomp <2.4.0 this led to some rules having no effect.
4698 libseccomp 2.4.0 changed how rules are generated, leading to a
4699 different ordering, which in turn led to a fatal crash during
4700 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4702 - Fix crash when reloading logging configuration while the
4703 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4704 0.4.1.7. Patch by Peter Gerber.
4706 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
4707 - Use GCC/Clang's printf-checking feature to make sure that
4708 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4709 bugfix on 0.4.1.1-alpha.
4711 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
4712 - Avoid a possible crash when trying to log a (fatal) assertion
4713 failure about mismatched magic numbers in configuration objects.
4714 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4716 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
4717 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4718 test_practracker.sh script. Doing so caused a test failure. Fixes
4719 bug 32705; bugfix on 0.4.2.1-alpha.
4720 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4721 skipping practracker checks. Fixes bug 32705; bugfix
4724 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4725 - Initialize the publish/subscribe system when running as a windows
4726 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4728 o Testing (backport from 0.4.3.1-alpha):
4729 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4730 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4731 fix the sandbox errors in 32722. Closes ticket 32240.
4732 - Re-enable the Travis CI macOS Chutney build, but don't let it
4733 prevent the Travis job from finishing. (The Travis macOS jobs are
4734 slow, so we don't want to have it delay the whole CI process.)
4735 Closes ticket 32629.
4737 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4738 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4741 Changes in version 0.4.1.8 - 2020-01-30
4742 This release backports several bugfixes from later release series,
4743 including some that had affected the Linux seccomp2 sandbox or Windows
4744 services. If you're running with one of those configurations, you'll
4745 probably want to upgrade; otherwise, you should be fine with your
4746 current version of 0.4.1.x.
4748 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4749 - Correct how we use libseccomp. Particularly, stop assuming that
4750 rules are applied in a particular order or that more rules are
4751 processed after the first match. Neither is the case! In
4752 libseccomp <2.4.0 this led to some rules having no effect.
4753 libseccomp 2.4.0 changed how rules are generated, leading to a
4754 different ordering, which in turn led to a fatal crash during
4755 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4757 - Fix crash when reloading logging configuration while the
4758 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4759 0.4.1.7. Patch by Peter Gerber.
4761 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
4762 - When running Tor with an option like --verify-config or
4763 --dump-config that does not start the event loop, avoid crashing
4764 if we try to exit early because of an error. Fixes bug 32407;
4765 bugfix on 0.3.3.1-alpha.
4767 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4768 - Initialize the publish/subscribe system when running as a windows
4769 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4771 o Testing (backport from 0.4.3.1-alpha):
4772 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4773 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4774 fix the sandbox errors in 32722. Closes ticket 32240.
4775 - Re-enable the Travis CI macOS Chutney build, but don't let it
4776 prevent the Travis job from finishing. (The Travis macOS jobs are
4777 slow, so we don't want to have it delay the whole CI process.)
4778 Closes ticket 32629.
4780 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4781 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4784 Changes in version 0.4.3.1-alpha - 2020-01-22
4785 This is the first alpha release in the 0.4.3.x series. It includes
4786 improved support for application integration of onion services, support
4787 for building in a client-only mode, and newly improved internal
4788 documentation (online at https://src-ref.docs.torproject.org/tor/). It
4789 also has numerous other small bugfixes and features, as well as
4790 improvements to our code's internal organization that should help us
4791 write better code in the future.
4793 o New system requirements:
4794 - When building Tor, you now need to have Python 3 in order to run
4795 the integration tests. (Python 2 is officially unsupported
4796 upstream, as of 1 Jan 2020.) Closes ticket 32608.
4798 o Major features (build system):
4799 - The relay code can now be disabled using the --disable-module-relay
4800 configure option. When this option is set, we also disable the
4801 dirauth module. Closes ticket 32123.
4802 - When Tor is compiled --disable-module-relay, we also omit the code
4803 used to act as a directory cache. Closes ticket 32487.
4805 o Major features (directory authority, ed25519):
4806 - Add support for banning a relay's ed25519 keys in the approved-
4807 routers file. This will help us migrate away from RSA keys in the
4808 future. Previously, only RSA keys could be banned in approved-
4809 routers. Resolves ticket 22029. Patch by Neel Chauhan.
4811 o Major features (onion service, controller):
4812 - New control port commands to manage client-side onion service
4813 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
4814 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
4815 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
4817 o Major features (onion service, SOCKS5):
4818 - Introduce a new SocksPort flag, ExtendedErrors, to support more
4819 detailed error codes in information for applications that support
4820 them. Closes ticket 30382; implements proposal 304.
4822 o Major features (proxy):
4823 - In addition to its current supported proxy types (HTTP CONNECT,
4824 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
4825 HAProxy server. A new torrc option was added to specify the
4826 address/port of the server: TCPProxy <protocol> <host>:<port>.
4827 Currently the only supported protocol for the option is haproxy.
4828 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
4830 o Major bugfixes (linux seccomp sandbox):
4831 - Correct how we use libseccomp. Particularly, stop assuming that
4832 rules are applied in a particular order or that more rules are
4833 processed after the first match. Neither is the case! In
4834 libseccomp <2.4.0 this led to some rules having no effect.
4835 libseccomp 2.4.0 changed how rules are generated, leading to a
4836 different ordering, which in turn led to a fatal crash during
4837 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4839 - Fix crash when reloading logging configuration while the
4840 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4841 0.4.1.7. Patch by Peter Gerber.
4843 o Major bugfixes (networking):
4844 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
4845 and accept strings as well as binary addresses. Fixes bug 32315;
4846 bugfix on 0.3.5.1-alpha.
4848 o Major bugfixes (onion service):
4849 - Report HS circuit failure back into the HS subsystem so we take
4850 appropriate action with regards to the client introduction point
4851 failure cache. This improves reachability of onion services, since
4852 now clients notice failing introduction circuits properly. Fixes
4853 bug 32020; bugfix on 0.3.2.1-alpha.
4855 o Minor feature (configure, build system):
4856 - Output a list of enabled/disabled features at the end of the
4857 configure process in a pleasing way. Closes ticket 31373.
4859 o Minor feature (heartbeat, onion service):
4860 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
4861 message. Closes ticket 31371.
4863 o Minor features (configuration validation):
4864 - Configuration validation can now be done by per-module callbacks,
4865 rather than a global validation function. This will let us reduce
4866 the size of config.c and some of its more cumbersome functions.
4867 Closes ticket 31241.
4869 o Minor features (configuration):
4870 - If a configured hardware crypto accelerator in AccelName is
4871 prefixed with "!", Tor now exits when it cannot be found. Closes
4873 - We now use flag-driven logic to warn about obsolete configuration
4874 fields, so that we can include their names. In 0.4.2, we used a
4875 special type, which prevented us from generating good warnings.
4876 Implements ticket 32404.
4878 o Minor features (controller):
4879 - Add stream isolation data to STREAM event. Closes ticket 19859.
4880 - Implement a new GETINFO command to fetch microdescriptor
4881 consensus. Closes ticket 31684.
4883 o Minor features (debugging, directory system):
4884 - Don't crash when we find a non-guard with a guard-fraction value
4885 set. Instead, log a bug warning, in an attempt to figure out how
4886 this happened. Diagnostic for ticket 32868.
4888 o Minor features (defense in depth):
4889 - Add additional checks around tor_vasprintf() usage, in case the
4890 function returns an error. Patch by Tobias Stoeckmann. Fixes
4893 o Minor features (developer tooling):
4894 - Remove the 0.2.9.x series branches from git scripts (git-merge-
4895 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
4896 Closes ticket 32772.
4898 o Minor features (developer tools):
4899 - Add a check_cocci_parse.sh script that checks that new code is
4900 parseable by Coccinelle. Add an exceptions file for unparseable
4901 files, and run the script from travis CI. Closes ticket 31919.
4902 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
4903 target. Closes ticket 31919.
4904 - Add a rename_c_identifiers.py tool to rename a bunch of C
4905 identifiers at once, and generate a well-formed commit message
4906 describing the change. This should help with refactoring. Closes
4908 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
4909 semantic patching tool with the correct flags. These flags are
4910 fairly easy to forget, and these scripts should help us use
4911 Coccinelle more effectively in the future. Closes ticket 31705.
4913 o Minor features (Doxygen):
4914 - Update Doxygen configuration file to a more recent template (from
4915 1.8.15). Closes ticket 32110.
4916 - "make doxygen" now works with out-of-tree builds. Closes
4918 - Make sure that doxygen outputs documentation for all of our C
4919 files. Previously, some were missing @file declarations, causing
4920 them to be ignored. Closes ticket 32307.
4921 - Our "make doxygen" target now respects --enable-fatal-warnings by
4922 default, and does not warn about items that are missing
4923 documentation. To warn about missing documentation, run configure
4924 with the "--enable-missing-doc-warnings" flag: doing so suspends
4925 fatal warnings for doxygen. Closes ticket 32385.
4927 o Minor features (git scripts):
4928 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
4929 customisation. Closes ticket 32347.
4930 - Add git-setup-dirs.sh, which sets up an upstream git repository
4931 and worktrees for tor maintainers. Closes ticket 29603.
4932 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
4933 remote. Closes ticket 32347.
4934 - Call the check_cocci_parse.sh script from the git commit and push
4935 hooks. Closes ticket 31919.
4936 - Make git-push-all.sh skip unchanged branches when pushing to
4937 upstream. The script already skipped unchanged test branches.
4938 Closes ticket 32216.
4939 - Make git-setup-dirs.sh create a master symlink in the worktree
4940 directory. Closes ticket 32347.
4941 - Skip unmodified source files when doing some existing git hook
4942 checks. Related to ticket 31919.
4944 o Minor features (IPv6, client):
4945 - Make Tor clients tell dual-stack exits that they prefer IPv6
4946 connections. This change is equivalent to setting the PreferIPv6
4947 flag on SOCKSPorts (and most other listener ports). Tor Browser
4948 has been setting this flag for some time, and we want to remove a
4949 client distinguisher at exits. Closes ticket 32637.
4951 o Minor features (portability, android):
4952 - When building for Android, disable some tests that depend on $HOME
4953 and/or pwdb, which Android doesn't have. Closes ticket 32825.
4954 Patch from Hans-Christoph Steiner.
4956 o Minor features (relay modularity):
4957 - Split the relay and server pluggable transport config code into
4958 separate files in the relay module. Disable this code when the
4959 relay module is disabled. Closes part of ticket 32213.
4960 - When the relay module is disabled, reject attempts to set the
4961 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
4962 ServerTransport* options, rather than ignoring the values of these
4963 options. Closes part of ticket 32213.
4965 o Minor features (relay):
4966 - When the relay module is disabled, change the default config so
4967 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
4969 o Minor features (release tools):
4970 - Port our ChangeLog formatting and sorting tools to Python 3.
4971 Closes ticket 32704.
4973 o Minor features (testing):
4974 - Detect some common failure cases for test_parseconf.sh in
4975 src/test/conf_failures. Closes ticket 32451.
4976 - Allow test_parseconf.sh to test expected log outputs for successful
4977 configs, as well as failed configs. Closes ticket 32451.
4978 - The test_parseconf.sh script now supports result variants for any
4979 combination of the optional libraries lzma, nss, and zstd. Closes
4982 o Minor features (tests, Android):
4983 - When running the unit tests on Android, create temporary files in
4984 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
4985 patch from Hans-Christoph Steiner.
4987 o Minor bugfixes (bridges):
4988 - Lowercase the configured value of BridgeDistribution before adding
4989 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4991 o Minor bugfixes (build system):
4992 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
4993 bugfix on 0.4.1.2-alpha.
4995 o Minor bugfixes (configuration handling):
4996 - Make control_event_conf_changed() take in a config_line_t instead
4997 of a smartlist of alternating key/value entries. Fixes bug 31531;
4998 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
5000 o Minor bugfixes (configuration):
5001 - Check for multiplication overflow when parsing memory units inside
5002 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
5003 - When dumping the configuration, stop adding a trailing space after
5004 the option name when there is no option value. This issue only
5005 affects options that accept an empty value or list. (Most options
5006 reject empty values, or delete the entire line from the dumped
5007 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
5008 - Avoid changing the user's value of HardwareAccel as stored by
5009 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
5010 bug 32382; bugfix on 0.2.2.1-alpha.
5011 - When creating a KeyDirectory with the same location as the
5012 DataDirectory (not recommended), respect the DataDirectory's
5013 group-readable setting if one has not been set for the
5014 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
5016 o Minor bugfixes (controller):
5017 - In routerstatus_has_changed(), check all the fields that are
5018 output over the control port. Fixes bug 20218; bugfix
5021 o Minor bugfixes (correctness checks):
5022 - Use GCC/Clang's printf-checking feature to make sure that
5023 tor_assertf() arguments are correctly typed. Fixes bug 32765;
5024 bugfix on 0.4.1.1-alpha.
5026 o Minor bugfixes (developer tools):
5027 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
5028 31336; bugfix on 0.4.1.2-alpha.
5030 o Minor bugfixes (dirauth module):
5031 - Split the dirauth config code into a separate file in the dirauth
5032 module. Disable this code when the dirauth module is disabled.
5033 Closes ticket 32213.
5034 - When the dirauth module is disabled, reject attempts to set the
5035 AuthoritativeDir option, rather than ignoring the value of the
5036 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
5038 o Minor bugfixes (embedded Tor):
5039 - When starting Tor any time after the first time in a process,
5040 register the thread in which it is running as the main thread.
5041 Previously, we only did this on Windows, which could lead to bugs
5042 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
5045 o Minor bugfixes (git scripts):
5046 - Avoid sleeping before the last push in git-push-all.sh. Closes
5048 - Forward all unrecognised arguments in git-push-all.sh to git push.
5049 Closes ticket 32216.
5051 o Minor bugfixes (hidden service v3):
5052 - Do not rely on a "circuit established" flag for intro circuits but
5053 instead always query the HS circuit map. This is to avoid sync
5054 issue with that flag and the map. Fixes bug 32094; bugfix
5057 o Minor bugfixes (logging, crash):
5058 - Avoid a possible crash when trying to log a (fatal) assertion
5059 failure about mismatched magic numbers in configuration objects.
5060 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
5062 o Minor bugfixes (onion service v2):
5063 - When sending the INTRO cell for a v2 Onion Service, look at the
5064 failure cache alongside timeout values to check if the intro point
5065 is marked as failed. Previously, we only looked at the relay
5066 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
5069 o Minor bugfixes (onion services v3, client):
5070 - Properly handle the client rendezvous circuit timeout. Previously
5071 Tor would sometimes timeout a rendezvous circuit awaiting the
5072 introduction ACK, and find itself unable to re-establish all
5073 circuits because the rendezvous circuit timed out too early. Fixes
5074 bug 32021; bugfix on 0.3.2.1-alpha.
5076 o Minor bugfixes (onion services):
5077 - In cancel_descriptor_fetches(), use
5078 connection_list_by_type_purpose() instead of
5079 connection_list_by_type_state(). Fixes bug 32639; bugfix on
5080 0.3.2.1-alpha. Patch by Neel Chauhan.
5082 o Minor bugfixes (scripts):
5083 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
5084 bugfix on 0.4.0.1-alpha.
5086 o Minor bugfixes (test):
5087 - Use the same code to find the tor binary in all of our test
5088 scripts. This change makes sure we are always using the coverage
5089 binary when coverage is enabled. Fixes bug 32368; bugfix
5092 o Minor bugfixes (testing):
5093 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
5094 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
5095 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
5096 test_practracker.sh script. Doing so caused a test failure. Fixes
5097 bug 32705; bugfix on 0.4.2.1-alpha.
5098 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
5099 skipping practracker checks. Fixes bug 32705; bugfix
5102 o Minor bugfixes (tests):
5103 - Our option-validation tests no longer depend on specially
5104 configured non-default, non-passing sets of options. Previously,
5105 the tests had been written to assume that options would _not_ be
5106 set to their defaults, which led to needless complexity and
5107 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
5109 o Minor bugfixes (windows service):
5110 - Initialize the publish/subscribe system when running as a windows
5111 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
5113 o Deprecated features:
5114 - Deprecate the ClientAutoIPv6ORPort option. This option was not
5115 true "Happy Eyeballs", and often failed on connections that
5116 weren't reliably dual-stack. Closes ticket 32942. Patch by
5120 - Provide a quickstart guide for a Circuit Padding Framework, and
5121 documentation for researchers to implement and study circuit
5122 padding machines. Closes ticket 28804.
5123 - Add documentation in 'HelpfulTools.md' to describe how to build a
5124 tag file. Closes ticket 32779.
5125 - Create a high-level description of the long-term software
5126 architecture goals. Closes ticket 32206.
5127 - Describe the --dump-config command in the manual page. Closes
5129 - Unite coding advice from this_not_that.md in torguts repo into our
5130 coding standards document. Resolves ticket 31853.
5133 - Our Doxygen configuration no longer generates LaTeX output. The
5134 reference manual produced by doing this was over 4000 pages long,
5135 and generally unusable. Closes ticket 32099.
5136 - The option "TestingEstimatedDescriptorPropagationTime" is now
5137 marked as obsolete. It has had no effect since 0.3.0.7, when
5138 clients stopped rejecting consensuses "from the future". Closes
5140 - We no longer support consensus methods before method 28; these
5141 methods were only used by authorities running versions of Tor that
5142 are now at end-of-life. In effect, this means that clients,
5143 relays, and authorities now assume that authorities will be
5144 running version 0.3.5.x or later. Closes ticket 32695.
5147 - Add more test cases for tor's UTF-8 validation function. Also,
5148 check the arguments passed to the function for consistency. Closes
5150 - Improve test coverage for relay and dirauth config code, focusing
5151 on option validation and normalization. Closes ticket 32213.
5152 - Improve the consistency of test_parseconf.sh output, and run all
5153 the tests, even if one fails. Closes ticket 32213.
5154 - Re-enable the Travis CI macOS Chutney build, but don't let it
5155 prevent the Travis job from finishing. (The Travis macOS jobs are
5156 slow, so we don't want to have it delay the whole CI process.)
5157 Closes ticket 32629.
5158 - Run the practracker unit tests in the pre-commit git hook. Closes
5160 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
5161 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
5162 fix the sandbox errors in 32722. Closes ticket 32240.
5164 o Code simplification and refactoring (channel):
5165 - Channel layer had a variable length cell handler that was not used
5166 and thus removed. Closes ticket 32892.
5168 o Code simplification and refactoring (configuration):
5169 - Immutability is now implemented as a flag on individual
5170 configuration options rather than as part of the option-transition
5171 checking code. Closes ticket 32344.
5172 - Instead of keeping a list of configuration options to check for
5173 relative paths, check all the options whose type is "FILENAME".
5174 Solves part of ticket 32339.
5175 - Our default log (which ordinarily sends NOTICE-level messages to
5176 standard output) is now handled in a more logical manner.
5177 Previously, we replaced the configured log options if they were
5178 empty. Now, we interpret an empty set of log options as meaning
5179 "use the default log". Closes ticket 31999.
5180 - Remove some unused arguments from the options_validate() function,
5181 to simplify our code and tests. Closes ticket 32187.
5182 - Simplify the options_validate() code so that it looks at the
5183 default options directly, rather than taking default options as an
5184 argument. This change lets us simplify its interface. Closes
5186 - Use our new configuration architecture to move most authority-
5187 related options to the directory authority module. Closes
5189 - When parsing the command line, handle options that determine our
5190 "quiet level" and our mode of operation (e.g., --dump-config and
5191 so on) all in one table. Closes ticket 32003.
5193 o Code simplification and refactoring (controller):
5194 - Create a new abstraction for formatting control protocol reply
5195 lines based on key-value pairs. Refactor some existing control
5196 protocol code to take advantage of this. Closes ticket 30984.
5197 - Create a helper function that can fetch network status or
5198 microdesc consensuses. Closes ticket 31684.
5200 o Code simplification and refactoring (dirauth modularization):
5201 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
5202 Closes ticket 32163.
5203 - Replace some confusing identifiers in process_descs.c. Closes
5205 - Simplify some relay and dirauth config code. Closes ticket 32213.
5207 o Code simplification and refactoring (misc):
5208 - Make all the structs we declare follow the same naming convention
5209 of ending with "_t". Closes ticket 32415.
5210 - Move and rename some configuration-related code for clarity.
5211 Closes ticket 32304.
5212 - Our include.am files are now broken up by subdirectory.
5213 Previously, src/core/include.am covered all of the subdirectories
5214 in "core", "feature", and "app". Closes ticket 32137.
5215 - Remove underused NS*() macros from test code: they make our tests
5216 more confusing, especially for code-formatting tools. Closes
5219 o Code simplification and refactoring (relay modularization):
5220 - Disable relay_periodic when the relay module is disabled. Closes
5222 - Disable relay_sys when the relay module is disabled. Closes
5225 o Code simplification and refactoring (tool support):
5226 - Add numerous missing dependencies to our include files, so that
5227 they can be included in different reasonable orders and still
5228 compile. Addresses part of ticket 32764.
5229 - Fix some parts of our code that were difficult for Coccinelle to
5230 parse. Related to ticket 31705.
5231 - Fix some small issues in our code that prevented automatic
5232 formatting tools from working. Addresses part of ticket 32764.
5234 o Documentation (manpage):
5235 - Alphabetize the Client Options section of the tor manpage. Closes
5237 - Alphabetize the General Options section of the tor manpage. Closes
5239 - In the tor(1) manpage, reword and improve formatting of the
5240 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
5241 32277. Based on work by Swati Thacker as part of Google Season
5243 - In the tor(1) manpage, reword and improve formatting of the FILES,
5244 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
5245 Swati Thacker as part of Google Season of Docs.
5247 o Testing (circuit, EWMA):
5248 - Add unit tests for circuitmux and EWMA subsystems. Closes
5251 o Testing (continuous integration):
5252 - Use zstd in our Travis Linux builds. Closes ticket 32242.
5255 Changes in version 0.4.2.5 - 2019-12-09
5256 This is the first stable release in the 0.4.2.x series. This series
5257 improves reliability and stability, and includes several stability and
5258 correctness improvements for onion services. It also fixes many smaller
5259 bugs present in previous series.
5261 Per our support policy, we will support the 0.4.2.x series for nine
5262 months, or until three months after the release of a stable 0.4.3.x:
5263 whichever is longer. If you need longer-term support, please stick
5264 with 0.3.5.x, which will we plan to support until Feb 2022.
5266 Per our support policy, we will support the 0.4.2.x series for nine
5267 months, or until three months after the release of a stable 0.4.3.x:
5268 whichever is longer. If you need longer-term support, please stick
5269 with 0.3.5.x, which will we plan to support until Feb 2022.
5271 Below are the changes since 0.4.1.4-rc. For a complete list of changes
5272 since 0.4.1.5, see the ReleaseNotes file.
5274 o Minor features (geoip):
5275 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5276 Country database. Closes ticket 32685.
5279 - Require C99 standards-conforming code in Travis CI, but allow GNU
5280 gcc extensions. Also activates clang's -Wtypedef-redefinition
5281 warnings. Build some jobs with -std=gnu99, and some jobs without.
5282 Closes ticket 32500.
5285 Changes in version 0.4.1.7 - 2019-12-09
5286 This release backports several bugfixes to improve stability and
5287 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
5288 including all relays relying on AccountingMax, should upgrade.
5290 o Major features (directory authorities, backport from 0.4.2.2-alpha):
5291 - Directory authorities now reject relays running all currently
5292 deprecated release series. The currently supported release series
5293 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
5295 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
5296 - Avoid a possible crash when restarting Tor in embedded mode and
5297 enabling a different set of publish/subscribe messages. Fixes bug
5298 31898; bugfix on 0.4.1.1-alpha.
5300 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5301 - Relays now respect their AccountingMax bandwidth again. When
5302 relays entered "soft" hibernation (which typically starts when
5303 we've hit 90% of our AccountingMax), we had stopped checking
5304 whether we should enter hard hibernation. Soft hibernation refuses
5305 new connections and new circuits, but the existing circuits can
5306 continue, meaning that relays could have exceeded their configured
5307 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5309 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5310 - Stop ignoring torrc options after an %include directive, when the
5311 included directory ends with a file that does not contain any
5312 config options (but does contain comments or whitespace). Fixes
5313 bug 31408; bugfix on 0.3.1.1-alpha.
5315 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5316 - Onion services now always use the exact number of intro points
5317 configured with the HiddenServiceNumIntroductionPoints option (or
5318 fewer if nodes are excluded). Before, a service could sometimes
5319 pick more intro points than configured. Fixes bug 31548; bugfix
5322 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5323 - When building on Appveyor and Travis, pass the "-k" flag to make,
5324 so that we are informed of all compilation failures, not just the
5325 first one or two. Closes ticket 31372.
5327 o Minor features (geoip, backport from 0.4.2.5):
5328 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5329 Country database. Closes ticket 32685.
5331 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5332 - Avoid spurious errors when Appveyor CI fails before the install step.
5333 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5335 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5336 - Fix a BUG() assertion that occurs within a very small race window
5337 between when a client intro circuit opens and when its descriptor
5338 gets cleaned up from the cache. The circuit is now closed early,
5339 which will trigger a re-fetch of the descriptor and continue the
5340 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5342 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5343 - Avoid trying to read data from closed connections, which can cause
5344 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5345 30344; bugfix on 0.1.1.1-alpha.
5347 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5348 - On abort, try harder to flush the output buffers of log messages.
5349 On some platforms (macOS), log messages could be discarded when
5350 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5351 - Report the tor version whenever an assertion fails. Previously, we
5352 only reported the Tor version on some crashes, and some non-fatal
5353 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5354 - When tor aborts due to an error, close log file descriptors before
5355 aborting. Closing the logs makes some OSes flush log file buffers,
5356 rather than deleting buffered log lines. Fixes bug 31594; bugfix
5359 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5360 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5361 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5362 - Disable backtrace signal handlers when shutting down tor. Fixes
5363 bug 31614; bugfix on 0.2.5.2-alpha.
5364 - Rate-limit the logging message about the obsolete .exit
5365 notation. Previously, there was no limit on this warning, which
5366 could potentially be triggered many times by a hostile website.
5367 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5369 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5370 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5371 cell on a connection using the obsolete v1 link protocol. Log a
5372 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5374 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5375 - Reset the periodic events' "enabled" flag when Tor is shut down
5376 cleanly. Previously, this flag was left on, which caused periodic
5377 events not to be re-enabled when Tor was relaunched in-process
5378 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5381 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
5382 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5383 31736; bugfix on 0.0.7.
5385 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5386 - Remove overly strict assertions that triggered when a pluggable
5387 transport failed to launch. Fixes bug 31091; bugfix
5389 - Remove an assertion in the Unix process backend. This assertion
5390 would trigger when we failed to find the executable for a child
5391 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5393 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5394 - Avoid crashing when starting with a corrupt keys directory where
5395 the old ntor key and the new ntor key are identical. Fixes bug
5396 30916; bugfix on 0.2.4.8-alpha.
5398 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5399 - When testing port rebinding, don't busy-wait for tor to log.
5400 Instead, actually sleep for a short time before polling again.
5401 Also improve the formatting of control commands and log messages.
5402 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5404 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
5405 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5406 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5408 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5409 - Log bugs about the TLS read buffer's length only once, rather than
5410 filling the logs with similar warnings. Fixes bug 31939; bugfix
5413 o Documentation (backport from 0.4.2.2-alpha):
5414 - Explain why we can't destroy the backtrace buffer mutex. Explain
5415 why we don't need to destroy the log mutex. Closes ticket 31736.
5417 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5418 - Disable all but one Travis CI macOS build, to mitigate slow
5419 scheduling of Travis macOS jobs. Closes ticket 32177.
5420 - Run the chutney IPv6 networks as part of Travis CI. Closes
5422 - Simplify the Travis CI build matrix, and optimise for build time.
5423 Closes ticket 31859.
5424 - Use Windows Server 2019 instead of Windows Server 2016 in our
5425 Appveyor builds. Closes ticket 32086.
5427 o Testing (continuous integration, backport from 0.4.2.4-rc):
5428 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5429 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5430 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5431 until we can fix some Bionic permissions issues (see ticket
5432 32240). Related to ticket 31919.
5433 - Install the mingw OpenSSL package in Appveyor. This makes sure
5434 that the OpenSSL headers and libraries match in Tor's Appveyor
5435 builds. (This bug was triggered by an Appveyor image update.)
5436 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5438 o Testing (continuous integration, backport from 0.4.2.5):
5439 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5440 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5441 Build some jobs with -std=gnu99, and some jobs without.
5442 Closes ticket 32500.
5445 Changes in version 0.4.0.6 - 2019-12-09
5446 This is the second stable release in the 0.4.0.x series. This release
5447 backports several bugfixes to improve stability and correctness. Anyone
5448 experiencing build problems or crashes with 0.4.0.5, including all relays
5449 relying on AccountingMax, should upgrade.
5451 Note that, per our support policy, support for the 0.4.0.x series will end
5452 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
5453 latest stable release, or downgrade to 0.3.5.x, which will get long-term
5454 support until 1 Feb 2022.
5456 o Directory authority changes (backport from 0.4.1.5):
5457 - The directory authority "dizum" has a new IP address. Closes
5460 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5461 - Consider our directory information to have changed when our list
5462 of bridges changes. Previously, Tor would not re-compute the
5463 status of its directory information when bridges changed, and
5464 therefore would not realize that it was no longer able to build
5465 circuits. Fixes part of bug 29875.
5466 - Do not count previously configured working bridges towards our
5467 total of working bridges. Previously, when Tor's list of bridges
5468 changed, it would think that the old bridges were still usable,
5469 and delay fetching router descriptors for the new ones. Fixes part
5470 of bug 29875; bugfix on 0.3.0.1-alpha.
5472 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5473 - When considering upgrading circuits from "waiting for guard" to
5474 "open", always ignore circuits that are marked for close. Otherwise,
5475 we can end up in the situation where a subsystem is notified that
5476 a closing circuit has just opened, leading to undesirable
5477 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5479 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5480 - Properly clean up the introduction point map when circuits change
5481 purpose from onion service circuits to pathbias, measurement, or
5482 other circuit types. This should fix some service-side instances
5483 of introduction point failure. Fixes bug 29034; bugfix
5486 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5487 - Fix an unreachable bug in which an introduction point could try to
5488 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5489 to encode, leading the relay to assert(). We've consolidated the
5490 ABI values into Trunnel now. Fixes bug 30454; bugfix
5492 - Clients can now handle unknown status codes from INTRODUCE_ACK
5493 cells. (The NACK behavior will stay the same.) This will allow us
5494 to extend status codes in the future without breaking the normal
5495 client behavior. Fixes another part of bug 30454; bugfix
5498 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5499 - Relays now respect their AccountingMax bandwidth again. When
5500 relays entered "soft" hibernation (which typically starts when
5501 we've hit 90% of our AccountingMax), we had stopped checking
5502 whether we should enter hard hibernation. Soft hibernation refuses
5503 new connections and new circuits, but the existing circuits can
5504 continue, meaning that relays could have exceeded their configured
5505 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5507 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5508 - Stop ignoring torrc options after an %include directive, when the
5509 included directory ends with a file that does not contain any
5510 config options (but does contain comments or whitespace). Fixes
5511 bug 31408; bugfix on 0.3.1.1-alpha.
5513 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5514 - Onion services now always use the exact number of intro points
5515 configured with the HiddenServiceNumIntroductionPoints option (or
5516 fewer if nodes are excluded). Before, a service could sometimes
5517 pick more intro points than configured. Fixes bug 31548; bugfix
5520 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5521 - Add a "--list-modules" command to print a list of which compile-
5522 time modules are enabled. Closes ticket 30452.
5524 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5525 - Remove sudo configuration lines from .travis.yml as they are no
5526 longer needed with current Travis build environment. Resolves
5529 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5530 - Our Travis configuration now uses Chutney to run some network
5531 integration tests automatically. Closes ticket 29280.
5533 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5534 - When building on Appveyor and Travis, pass the "-k" flag to make,
5535 so that we are informed of all compilation failures, not just the
5536 first one or two. Closes ticket 31372.
5538 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5539 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5540 in December 2018 (of which ~122 were still functional), with a
5541 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5542 in June 2019. Closes ticket 28795.
5544 o Minor features (geoip, backport from 0.4.2.5):
5545 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5546 Country database. Closes ticket 32685.
5548 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5549 - Change "make test-stem" so it only runs the stem tests that use
5550 tor. This change makes test-stem faster and more reliable. Closes
5553 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5554 - Avoid spurious errors when Appveyor CI fails before the install step.
5555 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5557 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5558 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5559 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5561 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5562 - Fix a logic error that prevented the SessionGroup sub-option from
5563 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5565 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
5566 - On relays, properly check that a padding machine is absent before
5567 logging a warning about it being absent. Fixes bug 30649; bugfix
5570 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5571 - Fix a BUG() assertion that occurs within a very small race window
5572 between when a client intro circuit opens and when its descriptor
5573 gets cleaned up from the cache. The circuit is now closed early,
5574 which will trigger a re-fetch of the descriptor and continue the
5575 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5577 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5578 - Don't believe clock skew results from NETINFO cells that appear to
5579 arrive before we sent the VERSIONS cells they are responding to.
5580 Previously, we would accept them up to 3 minutes "in the past".
5581 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5583 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5584 - Fix a compilation warning on Windows about casting a function
5585 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5588 o Minor bugfixes (compilation, backport from 0.4.1.5):
5589 - Avoid using labs() on time_t, which can cause compilation warnings
5590 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5592 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5593 - Suppress spurious float-conversion warnings from GCC when calling
5594 floating-point classifier functions on FreeBSD. Fixes part of bug
5595 31687; bugfix on 0.3.1.5-alpha.
5597 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5598 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5599 due to missing declarations of abort(), and prevent other such
5600 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5602 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5603 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5604 want authentication along with configured (but unused!)
5605 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5607 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5608 - Avoid trying to read data from closed connections, which can cause
5609 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5610 30344; bugfix on 0.1.1.1-alpha.
5612 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5613 - Allow the test-stem job to fail in Travis, because it sometimes
5614 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5615 - Skip test_rebind on macOS in Travis, because it is unreliable on
5616 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5617 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5618 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5620 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5621 - Avoid a set of possible code paths that could try to use freed
5622 memory in routerlist_free() while Tor was exiting. Fixes bug
5623 31003; bugfix on 0.1.2.2-alpha.
5625 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5626 - Stop crashing after parsing an unknown descriptor purpose
5627 annotation. We think this bug can only be triggered by modifying a
5628 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5630 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5631 - Move the "bandwidth-file-headers" line in directory authority
5632 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5635 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5636 - On abort, try harder to flush the output buffers of log messages.
5637 On some platforms (macOS), log messages could be discarded when
5638 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5639 - Report the tor version whenever an assertion fails. Previously, we
5640 only reported the Tor version on some crashes, and some non-fatal
5641 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5643 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5644 - When extracting an IPv6 address from a PF-based proxy, verify that
5645 we are actually configured to receive an IPv6 address, and log an
5646 internal error if not. Fixes part of bug 31687; bugfix
5649 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5650 - When tor is missing descriptors for some primary entry guards,
5651 make the log message less alarming. It's normal for descriptors to
5652 expire, as long as tor fetches new ones soon after. Fixes bug
5653 31657; bugfix on 0.3.3.1-alpha.
5655 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5656 - Do not log a warning when running with an OpenSSL version other
5657 than the one Tor was compiled with, if the two versions should be
5658 compatible. Previously, we would warn whenever the version was
5659 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5661 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5662 - Change log level of message "Hash of session info was not as
5663 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5666 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5667 - Rate-limit the logging message about the obsolete .exit
5668 notation. Previously, there was no limit on this warning, which
5669 could potentially be triggered many times by a hostile website.
5670 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5672 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5673 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5674 cell on a connection using the obsolete v1 link protocol. Log a
5675 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5677 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5678 - Reset the periodic events' "enabled" flag when Tor is shut down
5679 cleanly. Previously, this flag was left on, which caused periodic
5680 events not to be re-enabled when Tor was relaunched in-process
5681 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5684 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5685 - Avoid a minor memory leak that could occur on relays when failing
5686 to create a "keys" directory. Fixes bug 30148; bugfix
5689 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5690 - Fix a trivial memory leak when parsing an invalid value
5691 from a download schedule in the configuration. Fixes bug
5692 30894; bugfix on 0.3.4.1-alpha.
5694 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
5695 - Fix usage of minherit() on NetBSD and other platforms that define
5696 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5697 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5699 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5700 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5701 implementation) when failing to load an onion service client
5702 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5704 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5705 - When purging the DNS cache because of an out-of-memory condition,
5706 try purging just the older entries at first. Previously, we would
5707 always purge the whole thing. Fixes bug 29617; bugfix
5710 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5711 - Avoid crashing in our tor_vasprintf() implementation on systems
5712 that define neither vasprintf() nor _vscprintf(). (This bug has
5713 been here long enough that we question whether people are running
5714 Tor on such systems, but we're applying the fix out of caution.)
5715 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5718 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5719 - Remove overly strict assertions that triggered when a pluggable
5720 transport failed to launch. Fixes bug 31091; bugfix
5722 - Remove an assertion in the Unix process backend. This assertion
5723 would trigger when we failed to find the executable for a child
5724 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5726 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5727 - Avoid crashing when starting with a corrupt keys directory where
5728 the old ntor key and the new ntor key are identical. Fixes bug
5729 30916; bugfix on 0.2.4.8-alpha.
5731 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5732 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5733 31463; bugfix on 0.3.5.4-alpha.
5735 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5736 - When testing port rebinding, don't busy-wait for tor to log.
5737 Instead, actually sleep for a short time before polling again.
5738 Also improve the formatting of control commands and log messages.
5739 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5741 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5742 - Log bugs about the TLS read buffer's length only once, rather than
5743 filling the logs with similar warnings. Fixes bug 31939; bugfix
5746 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5747 - Always retry v2 single onion service intro and rend circuits with
5748 a 3-hop path. Previously, v2 single onion services used a 3-hop
5749 path when rendezvous circuits were retried after a remote or
5750 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5751 23818; bugfix on 0.2.9.3-alpha.
5752 - Make v3 single onion services fall back to a 3-hop intro, when all
5753 intro points are unreachable via a 1-hop path. Previously, v3
5754 single onion services failed when all intro nodes were unreachable
5755 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5757 o Documentation (backport from 0.4.2.1-alpha):
5758 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5759 notice.html so that operators no longer have to host it
5760 themselves. Closes ticket 31089.
5762 o Testing (backport from 0.4.1.2-alpha):
5763 - Specify torrc paths (with empty files) when launching tor in
5764 integration tests; refrain from reading user and system torrcs.
5765 Resolves issue 29702.
5767 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5768 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5770 o Testing (continuous integration, backport from 0.4.1.5):
5771 - In Travis, make stem log a controller trace to the console, and
5772 tail stem's tor log after failure. Closes ticket 30591.
5773 - In Travis, only run the stem tests that use a tor binary. Closes
5776 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5777 - Disable all but one Travis CI macOS build, to mitigate slow
5778 scheduling of Travis macOS jobs. Closes ticket 32177.
5779 - Run the chutney IPv6 networks as part of Travis CI. Closes
5781 - Simplify the Travis CI build matrix, and optimise for build time.
5782 Closes ticket 31859.
5783 - Use Windows Server 2019 instead of Windows Server 2016 in our
5784 Appveyor builds. Closes ticket 32086.
5786 o Testing (continuous integration, backport from 0.4.2.4-rc):
5787 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5788 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5789 until we can fix some Bionic permissions issues (see ticket
5790 32240). Related to ticket 31919.
5791 - Install the mingw OpenSSL package in Appveyor. This makes sure
5792 that the OpenSSL headers and libraries match in Tor's Appveyor
5793 builds. (This bug was triggered by an Appveyor image update.)
5794 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5795 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5797 o Testing (continuous integration, backport from 0.4.2.5):
5798 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5799 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5800 Build some jobs with -std=gnu99, and some jobs without.
5801 Closes ticket 32500.
5803 Changes in version 0.3.5.9 - 2019-12-09
5804 Tor 0.3.5.9 backports serveral fixes from later releases, including
5805 several that affect bridge users, relay stability, onion services,
5808 o Directory authority changes (backport from 0.4.1.5):
5809 - The directory authority "dizum" has a new IP address. Closes
5812 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5813 - Consider our directory information to have changed when our list
5814 of bridges changes. Previously, Tor would not re-compute the
5815 status of its directory information when bridges changed, and
5816 therefore would not realize that it was no longer able to build
5817 circuits. Fixes part of bug 29875.
5818 - Do not count previously configured working bridges towards our
5819 total of working bridges. Previously, when Tor's list of bridges
5820 changed, it would think that the old bridges were still usable,
5821 and delay fetching router descriptors for the new ones. Fixes part
5822 of bug 29875; bugfix on 0.3.0.1-alpha.
5824 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5825 - When considering upgrading circuits from "waiting for guard" to
5826 "open", always ignore circuits that are marked for close. Otherwise,
5827 we can end up in the situation where a subsystem is notified that
5828 a closing circuit has just opened, leading to undesirable
5829 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5831 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
5832 - When running with NSS, disable TLS 1.2 ciphersuites that use
5833 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5834 these ciphersuites don't work -- which caused relays to fail to
5835 handshake with one another when these ciphersuites were enabled.
5836 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5838 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5839 - Properly clean up the introduction point map when circuits change
5840 purpose from onion service circuits to pathbias, measurement, or
5841 other circuit types. This should fix some service-side instances
5842 of introduction point failure. Fixes bug 29034; bugfix
5845 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5846 - Fix an unreachable bug in which an introduction point could try to
5847 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5848 to encode, leading the relay to assert(). We've consolidated the
5849 ABI values into Trunnel now. Fixes bug 30454; bugfix
5851 - Clients can now handle unknown status codes from INTRODUCE_ACK
5852 cells. (The NACK behavior will stay the same.) This will allow us
5853 to extend status codes in the future without breaking the normal
5854 client behavior. Fixes another part of bug 30454; bugfix
5857 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5858 - Stop ignoring torrc options after an %include directive, when the
5859 included directory ends with a file that does not contain any
5860 config options (but does contain comments or whitespace). Fixes
5861 bug 31408; bugfix on 0.3.1.1-alpha.
5863 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5864 - Onion services now always use the exact number of intro points
5865 configured with the HiddenServiceNumIntroductionPoints option (or
5866 fewer if nodes are excluded). Before, a service could sometimes
5867 pick more intro points than configured. Fixes bug 31548; bugfix
5870 o Minor features (address selection, backport from 0.4.0.3-alpha):
5871 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5872 private for others. This subnet is the RFC 6598 (Carrier Grade
5873 NAT) IP range, and is deployed by many ISPs as an alternative to
5874 RFC 1918 that does not break existing internal networks. Tor now
5875 blocks SOCKS and control ports on these addresses and warns users
5876 if client ports or ExtORPorts are listening on a RFC 6598 address.
5877 Closes ticket 28525. Patch by Neel Chauhan.
5879 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
5880 - Make bandwidth authorities ignore relays that are reported in the
5881 bandwidth file with the flag "vote=0". This change allows us to
5882 report unmeasured relays for diagnostic reasons without including
5883 their bandwidth in the bandwidth authorities' vote. Closes
5886 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5887 - Add a "--list-modules" command to print a list of which compile-
5888 time modules are enabled. Closes ticket 30452.
5890 o Minor features (continuous integration, backport from 0.4.0.4-rc):
5891 - On Travis Rust builds, cleanup Rust registry and refrain from
5892 caching the "target/" directory to speed up builds. Resolves
5895 o Minor features (continuous integration, backport from 0.4.0.5):
5896 - In Travis, tell timelimit to use stem's backtrace signals, and
5897 launch python directly from timelimit, so python receives the
5898 signals from timelimit, rather than make. Closes ticket 30117.
5900 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5901 - Remove sudo configuration lines from .travis.yml as they are no
5902 longer needed with current Travis build environment. Resolves
5905 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5906 - Our Travis configuration now uses Chutney to run some network
5907 integration tests automatically. Closes ticket 29280.
5909 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5910 - When building on Appveyor and Travis, pass the "-k" flag to make,
5911 so that we are informed of all compilation failures, not just the
5912 first one or two. Closes ticket 31372.
5914 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5915 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5916 in December 2018 (of which ~122 were still functional), with a
5917 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5918 in June 2019. Closes ticket 28795.
5920 o Minor features (geoip, backport from 0.4.2.5):
5921 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5922 Country database. Closes ticket 32685.
5924 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
5925 - Try to log an error from NSS (if there is any) and a more useful
5926 description of our situation if we are using NSS and a call to
5927 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5929 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5930 - Change "make test-stem" so it only runs the stem tests that use
5931 tor. This change makes test-stem faster and more reliable. Closes
5934 o Minor bugfixes (security, backport from 0.4.0.4-rc):
5935 - Verify in more places that we are not about to create a buffer
5936 with more than INT_MAX bytes, to avoid possible OOB access in the
5937 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5938 fixed by Tobias Stoeckmann.
5939 - Fix a potential double free bug when reading huge bandwidth files.
5940 The issue is not exploitable in the current Tor network because
5941 the vulnerable code is only reached when directory authorities
5942 read bandwidth files, but bandwidth files come from a trusted
5943 source (usually the authorities themselves). Furthermore, the
5944 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5945 which are not used by any of the current authorities. Fixes bug
5946 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5949 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
5950 - Reset coverage state on disk after Travis CI has finished. This
5951 should prevent future coverage merge errors from causing the test
5952 suite for the "process" subsystem to fail. The process subsystem
5953 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5955 - Terminate test-stem if it takes more than 9.5 minutes to run.
5956 (Travis terminates the job after 10 minutes of no output.)
5957 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5959 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5960 - Avoid spurious errors when Appveyor CI fails before the install step.
5961 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5963 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5964 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5965 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5967 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
5968 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5969 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5972 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5973 - Fix a logic error that prevented the SessionGroup sub-option from
5974 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5976 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5977 - Fix a BUG() assertion that occurs within a very small race window
5978 between when a client intro circuit opens and when its descriptor
5979 gets cleaned up from the cache. The circuit is now closed early,
5980 which will trigger a re-fetch of the descriptor and continue the
5981 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5983 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5984 - Don't believe clock skew results from NETINFO cells that appear to
5985 arrive before we sent the VERSIONS cells they are responding to.
5986 Previously, we would accept them up to 3 minutes "in the past".
5987 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5989 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5990 - Fix a compilation warning on Windows about casting a function
5991 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5994 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
5995 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
5996 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
5998 o Minor bugfixes (compilation, backport from 0.4.1.5):
5999 - Avoid using labs() on time_t, which can cause compilation warnings
6000 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6002 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6003 - Suppress spurious float-conversion warnings from GCC when calling
6004 floating-point classifier functions on FreeBSD. Fixes part of bug
6005 31687; bugfix on 0.3.1.5-alpha.
6007 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
6008 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
6009 due to missing declarations of abort(), and prevent other such
6010 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
6012 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
6013 - Fix a bug that prevented us from supporting SOCKS5 proxies that
6014 want authentication along with configured (but unused!)
6015 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
6017 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
6018 - Avoid trying to read data from closed connections, which can cause
6019 needless loops in Libevent and infinite loops in Shadow. Fixes bug
6020 30344; bugfix on 0.1.1.1-alpha.
6022 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
6023 - Allow the test-stem job to fail in Travis, because it sometimes
6024 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6025 - Skip test_rebind on macOS in Travis, because it is unreliable on
6026 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6027 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6028 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6030 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
6031 - Avoid a set of possible code paths that could try to use freed
6032 memory in routerlist_free() while Tor was exiting. Fixes bug
6033 31003; bugfix on 0.1.2.2-alpha.
6035 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
6036 - Stop crashing after parsing an unknown descriptor purpose
6037 annotation. We think this bug can only be triggered by modifying a
6038 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6040 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
6041 - Move the "bandwidth-file-headers" line in directory authority
6042 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
6045 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
6046 - On abort, try harder to flush the output buffers of log messages.
6047 On some platforms (macOS), log messages could be discarded when
6048 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6049 - Report the tor version whenever an assertion fails. Previously, we
6050 only reported the Tor version on some crashes, and some non-fatal
6051 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6053 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6054 - When extracting an IPv6 address from a PF-based proxy, verify that
6055 we are actually configured to receive an IPv6 address, and log an
6056 internal error if not. Fixes part of bug 31687; bugfix
6059 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6060 - When tor is missing descriptors for some primary entry guards,
6061 make the log message less alarming. It's normal for descriptors to
6062 expire, as long as tor fetches new ones soon after. Fixes bug
6063 31657; bugfix on 0.3.3.1-alpha.
6065 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
6066 - Avoid logging that we are relaxing a circuit timeout when that
6067 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
6069 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
6070 - Correct a misleading error message when IPv4Only or IPv6Only is
6071 used but the resolved address can not be interpreted as an address
6072 of the specified IP version. Fixes bug 13221; bugfix on
6073 0.2.3.9-alpha. Patch from Kris Katterjohn.
6074 - Log the correct port number for listening sockets when "auto" is
6075 used to let Tor pick the port number. Previously, port 0 was
6076 logged instead of the actual port number. Fixes bug 29144; bugfix
6077 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6078 - Stop logging a BUG() warning when Tor is waiting for exit
6079 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
6081 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
6082 - Do not log a warning when running with an OpenSSL version other
6083 than the one Tor was compiled with, if the two versions should be
6084 compatible. Previously, we would warn whenever the version was
6085 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
6087 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6088 - Change log level of message "Hash of session info was not as
6089 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6092 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
6093 - Rate-limit the logging message about the obsolete .exit
6094 notation. Previously, there was no limit on this warning, which
6095 could potentially be triggered many times by a hostile website.
6096 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
6098 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
6099 - Do not log a nonfatal assertion failure when receiving a VERSIONS
6100 cell on a connection using the obsolete v1 link protocol. Log a
6101 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
6103 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
6104 - Reset the periodic events' "enabled" flag when Tor is shut down
6105 cleanly. Previously, this flag was left on, which caused periodic
6106 events not to be re-enabled when Tor was relaunched in-process
6107 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
6110 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
6111 - Avoid a minor memory leak that could occur on relays when failing
6112 to create a "keys" directory. Fixes bug 30148; bugfix
6115 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
6116 - Fix a trivial memory leak when parsing an invalid value
6117 from a download schedule in the configuration. Fixes bug
6118 30894; bugfix on 0.3.4.1-alpha.
6120 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
6121 - Refactor the shared random state's memory management so that it
6122 actually takes ownership of the shared random value pointers.
6123 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
6125 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
6126 - Stop leaking parts of the shared random state in the shared-random
6127 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
6129 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
6130 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
6131 implementation) when failing to load an onion service client
6132 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
6134 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
6135 - When purging the DNS cache because of an out-of-memory condition,
6136 try purging just the older entries at first. Previously, we would
6137 always purge the whole thing. Fixes bug 29617; bugfix
6140 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
6141 - Avoid crashing in our tor_vasprintf() implementation on systems
6142 that define neither vasprintf() nor _vscprintf(). (This bug has
6143 been here long enough that we question whether people are running
6144 Tor on such systems, but we're applying the fix out of caution.)
6145 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
6148 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
6149 - Avoid crashing when starting with a corrupt keys directory where
6150 the old ntor key and the new ntor key are identical. Fixes bug
6151 30916; bugfix on 0.2.4.8-alpha.
6153 o Minor bugfixes (rust, backport from 0.4.0.5):
6154 - Abort on panic in all build profiles, instead of potentially
6155 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
6157 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6158 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6159 31463; bugfix on 0.3.5.4-alpha.
6161 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
6162 - Allow connections to single onion services to remain idle without
6163 being disconnected. Previously, relays acting as rendezvous points
6164 for single onion services were mistakenly closing idle rendezvous
6165 circuits after 60 seconds, thinking that they were unused
6166 directory-fetching circuits that had served their purpose. Fixes
6167 bug 29665; bugfix on 0.2.1.26.
6169 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
6170 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
6171 relay and bridge extra-info documents. Fixes bug 29017; bugfix
6174 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
6175 - Downgrade some LOG_ERR messages in the address/* tests to
6176 warnings. The LOG_ERR messages were occurring when we had no
6177 configured network. We were failing the unit tests, because we
6178 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
6179 29530; bugfix on 0.3.5.8.
6180 - Fix our gcov wrapper script to look for object files at the
6181 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
6183 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
6184 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
6185 recent test-network.sh to use new chutney features in CI. Fixes
6186 bug 29703; bugfix on 0.2.9.1-alpha.
6187 - Fix a test failure on Windows caused by an unexpected "BUG"
6188 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
6191 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
6192 - When testing port rebinding, don't busy-wait for tor to log.
6193 Instead, actually sleep for a short time before polling again.
6194 Also improve the formatting of control commands and log messages.
6195 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
6197 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
6198 - When classifying a client's selection of TLS ciphers, if the
6199 client ciphers are not yet available, do not cache the result.
6200 Previously, we had cached the unavailability of the cipher list
6201 and never looked again, which in turn led us to assume that the
6202 client only supported the ancient V1 link protocol. This, in turn,
6203 was causing Stem integration tests to stall in some cases. Fixes
6204 bug 30021; bugfix on 0.2.4.8-alpha.
6206 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
6207 - Log bugs about the TLS read buffer's length only once, rather than
6208 filling the logs with similar warnings. Fixes bug 31939; bugfix
6211 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6212 - Always retry v2 single onion service intro and rend circuits with
6213 a 3-hop path. Previously, v2 single onion services used a 3-hop
6214 path when rendezvous circuits were retried after a remote or
6215 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6216 23818; bugfix on 0.2.9.3-alpha.
6217 - Make v3 single onion services fall back to a 3-hop intro, when all
6218 intro points are unreachable via a 1-hop path. Previously, v3
6219 single onion services failed when all intro nodes were unreachable
6220 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6222 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
6223 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
6224 Windows Server 2012 R2 job. The remaining 2 jobs still provide
6225 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
6226 fast_finish, so failed jobs terminate the build immediately. Fixes
6227 bug 29601; bugfix on 0.3.5.4-alpha.
6229 o Documentation (backport from 0.4.2.1-alpha):
6230 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6231 notice.html so that operators no longer have to host it
6232 themselves. Closes ticket 31089.
6234 o Testing (backport from 0.4.1.2-alpha):
6235 - Specify torrc paths (with empty files) when launching tor in
6236 integration tests; refrain from reading user and system torrcs.
6237 Resolves issue 29702.
6239 o Testing (continuous integration, backport from 0.4.1.1-alpha):
6240 - In Travis, show stem's tor log after failure. Closes ticket 30234.
6242 o Testing (continuous integration, backport from 0.4.1.5):
6243 - In Travis, make stem log a controller trace to the console, and
6244 tail stem's tor log after failure. Closes ticket 30591.
6245 - In Travis, only run the stem tests that use a tor binary. Closes
6248 o Testing (continuous integration, backport from 0.4.2.3-alpha):
6249 - Disable all but one Travis CI macOS build, to mitigate slow
6250 scheduling of Travis macOS jobs. Closes ticket 32177.
6251 - Run the chutney IPv6 networks as part of Travis CI. Closes
6253 - Simplify the Travis CI build matrix, and optimise for build time.
6254 Closes ticket 31859.
6255 - Use Windows Server 2019 instead of Windows Server 2016 in our
6256 Appveyor builds. Closes ticket 32086.
6258 o Testing (continuous integration, backport from 0.4.2.4-rc):
6259 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
6260 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
6261 until we can fix some Bionic permissions issues (see ticket
6262 32240). Related to ticket 31919.
6263 - Install the mingw OpenSSL package in Appveyor. This makes sure
6264 that the OpenSSL headers and libraries match in Tor's Appveyor
6265 builds. (This bug was triggered by an Appveyor image update.)
6266 Fixes bug 32449; bugfix on 0.3.5.6-rc.
6267 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
6269 o Testing (continuous integration, backport from 0.4.2.5):
6270 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
6271 extensions. Also activates clang's -Wtypedef-redefinition warnings.
6272 Build some jobs with -std=gnu99, and some jobs without.
6273 Closes ticket 32500.
6275 Changes in version 0.4.2.4-rc - 2019-11-15
6276 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
6277 several bugs from earlier versions, including a few that would result in
6278 stack traces or incorrect behavior.
6280 o Minor features (build system):
6281 - Make pkg-config use --prefix when cross-compiling, if
6282 PKG_CONFIG_PATH is not set. Closes ticket 32191.
6284 o Minor features (geoip):
6285 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
6286 Country database. Closes ticket 32440.
6288 o Minor bugfixes (client, onion service v3):
6289 - Fix a BUG() assertion that occurs within a very small race window
6290 between when a client intro circuit opens and when its descriptor
6291 gets cleaned up from the cache. The circuit is now closed early,
6292 which will trigger a re-fetch of the descriptor and continue the
6293 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
6295 o Minor bugfixes (code quality):
6296 - Fix "make check-includes" so it runs correctly on out-of-tree
6297 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
6299 o Minor bugfixes (configuration):
6300 - Log the option name when skipping an obsolete option. Fixes bug
6301 32295; bugfix on 0.4.2.1-alpha.
6303 o Minor bugfixes (crash):
6304 - When running Tor with an option like --verify-config or
6305 --dump-config that does not start the event loop, avoid crashing
6306 if we try to exit early because of an error. Fixes bug 32407;
6307 bugfix on 0.3.3.1-alpha.
6309 o Minor bugfixes (directory):
6310 - When checking if a directory connection is anonymous, test if the
6311 circuit was marked for close before looking at its channel. This
6312 avoids a BUG() stacktrace if the circuit was previously closed.
6313 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
6315 o Minor bugfixes (shellcheck):
6316 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
6317 32402; bugfix on 0.4.2.1-alpha.
6318 - Start checking most scripts for shellcheck errors again. Fixes bug
6319 32402; bugfix on 0.4.2.1-alpha.
6321 o Testing (continuous integration):
6322 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
6323 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
6324 until we can fix some Bionic permissions issues (see ticket
6325 32240). Related to ticket 31919.
6326 - Install the mingw OpenSSL package in Appveyor. This makes sure
6327 that the OpenSSL headers and libraries match in Tor's Appveyor
6328 builds. (This bug was triggered by an Appveyor image update.)
6329 Fixes bug 32449; bugfix on 0.3.5.6-rc.
6330 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
6333 Changes in version 0.4.2.3-alpha - 2019-10-24
6334 This release fixes several bugs from the previous alpha release, and
6335 from earlier versions of Tor.
6337 o Major bugfixes (relay):
6338 - Relays now respect their AccountingMax bandwidth again. When
6339 relays entered "soft" hibernation (which typically starts when
6340 we've hit 90% of our AccountingMax), we had stopped checking
6341 whether we should enter hard hibernation. Soft hibernation refuses
6342 new connections and new circuits, but the existing circuits can
6343 continue, meaning that relays could have exceeded their configured
6344 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
6346 o Major bugfixes (v3 onion services):
6347 - Onion services now always use the exact number of intro points
6348 configured with the HiddenServiceNumIntroductionPoints option (or
6349 fewer if nodes are excluded). Before, a service could sometimes
6350 pick more intro points than configured. Fixes bug 31548; bugfix
6353 o Minor feature (onion services, control port):
6354 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
6355 (v3) onion services. Previously it defaulted to RSA1024 (v2).
6356 Closes ticket 29669.
6358 o Minor features (testing):
6359 - When running tests that attempt to look up hostnames, replace the
6360 libc name lookup functions with ones that do not actually touch
6361 the network. This way, the tests complete more quickly in the
6362 presence of a slow or missing DNS resolver. Closes ticket 31841.
6364 o Minor features (testing, continuous integration):
6365 - Disable all but one Travis CI macOS build, to mitigate slow
6366 scheduling of Travis macOS jobs. Closes ticket 32177.
6367 - Run the chutney IPv6 networks as part of Travis CI. Closes
6369 - Simplify the Travis CI build matrix, and optimise for build time.
6370 Closes ticket 31859.
6371 - Use Windows Server 2019 instead of Windows Server 2016 in our
6372 Appveyor builds. Closes ticket 32086.
6374 o Minor bugfixes (build system):
6375 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
6376 32124; bugfix on 0.3.4.1-alpha.
6377 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
6379 - Stop failing when jemalloc is requested, but tcmalloc is not
6380 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
6381 - When pkg-config is not installed, or a library that depends on
6382 pkg-config is not found, tell the user what to do to fix the
6383 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
6385 o Minor bugfixes (connections):
6386 - Avoid trying to read data from closed connections, which can cause
6387 needless loops in Libevent and infinite loops in Shadow. Fixes bug
6388 30344; bugfix on 0.1.1.1-alpha.
6390 o Minor bugfixes (error handling):
6391 - Always lock the backtrace buffer before it is used. Fixes bug
6392 31734; bugfix on 0.2.5.3-alpha.
6394 o Minor bugfixes (mainloop, periodic events, in-process API):
6395 - Reset the periodic events' "enabled" flag when Tor is shut down
6396 cleanly. Previously, this flag was left on, which caused periodic
6397 events not to be re-enabled when Tor was relaunched in-process
6398 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
6401 o Minor bugfixes (process management):
6402 - Remove overly strict assertions that triggered when a pluggable
6403 transport failed to launch. Fixes bug 31091; bugfix
6405 - Remove an assertion in the Unix process backend. This assertion
6406 would trigger when we failed to find the executable for a child
6407 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
6409 o Minor bugfixes (testing):
6410 - Avoid intermittent test failures due to a test that had relied on
6411 inconsistent timing sources. Fixes bug 31995; bugfix
6413 - When testing port rebinding, don't busy-wait for tor to log.
6414 Instead, actually sleep for a short time before polling again.
6415 Also improve the formatting of control commands and log messages.
6416 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
6418 o Minor bugfixes (tls, logging):
6419 - Log bugs about the TLS read buffer's length only once, rather than
6420 filling the logs with similar warnings. Fixes bug 31939; bugfix
6423 o Minor bugfixes (v3 onion services):
6424 - Fix an implicit conversion from ssize_t to size_t discovered by
6425 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
6426 - Fix a memory leak in an unlikely error code path when encoding HS
6427 DoS establish intro extension cell. Fixes bug 32063; bugfix
6429 - When cleaning up intro circuits for a v3 onion service, don't
6430 remove circuits that have an established or pending circuit, even
6431 if they ran out of retries. This way, we don't remove a circuit on
6432 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
6435 - Correct the description of "GuardLifetime". Fixes bug 31189;
6436 bugfix on 0.3.0.1-alpha.
6437 - Make clear in the man page, in both the bandwidth section and the
6438 AccountingMax section, that Tor counts in powers of two, not
6439 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
6440 bytes. Resolves ticket 32106.
6443 Changes in version 0.4.2.2-alpha - 2019-10-07
6444 This release fixes several bugs from the previous alpha release, and
6445 from earlier versions. It also includes a change in authorities, so
6446 that they begin to reject the currently unsupported release series.
6448 o Major features (directory authorities):
6449 - Directory authorities now reject relays running all currently
6450 deprecated release series. The currently supported release series
6451 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
6453 o Major bugfixes (embedded Tor):
6454 - Avoid a possible crash when restarting Tor in embedded mode and
6455 enabling a different set of publish/subscribe messages. Fixes bug
6456 31898; bugfix on 0.4.1.1-alpha.
6458 o Major bugfixes (torrc parsing):
6459 - Stop ignoring torrc options after an %include directive, when the
6460 included directory ends with a file that does not contain any
6461 config options (but does contain comments or whitespace). Fixes
6462 bug 31408; bugfix on 0.3.1.1-alpha.
6464 o Minor features (auto-formatting scripts):
6465 - When annotating C macros, never generate a line that our check-
6466 spaces script would reject. Closes ticket 31759.
6467 - When annotating C macros, try to remove cases of double-negation.
6468 Closes ticket 31779.
6470 o Minor features (continuous integration):
6471 - When building on Appveyor and Travis, pass the "-k" flag to make,
6472 so that we are informed of all compilation failures, not just the
6473 first one or two. Closes ticket 31372.
6475 o Minor features (geoip):
6476 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
6477 Country database. Closes ticket 31931.
6479 o Minor features (maintenance scripts):
6480 - Add a Coccinelle script to detect bugs caused by incrementing or
6481 decrementing a variable inside a call to log_debug(). Since
6482 log_debug() is a macro whose arguments are conditionally
6483 evaluated, it is usually an error to do this. One such bug was
6484 30628, in which SENDME cells were miscounted by a decrement
6485 operator inside a log_debug() call. Closes ticket 30743.
6487 o Minor features (onion services v3):
6488 - Assist users who try to setup v2 client authorization in v3 onion
6489 services by pointing them to the right documentation. Closes
6492 o Minor bugfixes (Appveyor continuous integration):
6493 - Avoid spurious errors when Appveyor CI fails before the install
6494 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
6496 o Minor bugfixes (best practices tracker):
6497 - When listing overbroad exceptions, do not also list problems, and
6498 do not list insufficiently broad exceptions. Fixes bug 31338;
6499 bugfix on 0.4.2.1-alpha.
6501 o Minor bugfixes (controller protocol):
6502 - Fix the MAPADDRESS controller command to accept one or more
6503 arguments. Previously, it required two or more arguments, and
6504 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6506 o Minor bugfixes (logging):
6507 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
6508 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
6509 - Disable backtrace signal handlers when shutting down tor. Fixes
6510 bug 31614; bugfix on 0.2.5.2-alpha.
6511 - Rate-limit the logging message about the obsolete .exit
6512 notation. Previously, there was no limit on this warning, which
6513 could potentially be triggered many times by a hostile website.
6514 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
6515 - When initialising log domain masks, only set known log domains.
6516 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
6518 o Minor bugfixes (logging, protocol violations):
6519 - Do not log a nonfatal assertion failure when receiving a VERSIONS
6520 cell on a connection using the obsolete v1 link protocol. Log a
6521 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
6523 o Minor bugfixes (modules):
6524 - Explain what the optional Directory Authority module is, and what
6525 happens when it is disabled. Fixes bug 31825; bugfix
6528 o Minor bugfixes (multithreading):
6529 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
6530 31736; bugfix on 0.0.7.
6532 o Minor bugfixes (relay):
6533 - Avoid crashing when starting with a corrupt keys directory where
6534 the old ntor key and the new ntor key are identical. Fixes bug
6535 30916; bugfix on 0.2.4.8-alpha.
6537 o Minor bugfixes (tests, SunOS):
6538 - Avoid a map_anon_nofork test failure due to a signed/unsigned
6539 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
6541 o Code simplification and refactoring:
6542 - Refactor connection_control_process_inbuf() to reduce the size of
6543 a practracker exception. Closes ticket 31840.
6544 - Refactor the microdescs_parse_from_string() function into smaller
6545 pieces, for better comprehensibility. Closes ticket 31675.
6546 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
6547 tests and fuzzers, rather than using hard-coded values. Closes
6549 - Interface for function `decrypt_desc_layer` cleaned up. Closes
6553 - Document the signal-safe logging behaviour in the tor man page.
6554 Also add some comments to the relevant functions. Closes
6556 - Explain why we can't destroy the backtrace buffer mutex. Explain
6557 why we don't need to destroy the log mutex. Closes ticket 31736.
6558 - The Tor source code repository now includes a (somewhat dated)
6559 description of Tor's modular architecture, in doc/HACKING/design.
6560 This is based on the old "tor-guts.git" repository, which we are
6561 adopting and superseding. Closes ticket 31849.
6564 Changes in version 0.4.1.6 - 2019-09-19
6565 This release backports several bugfixes to improve stability and
6566 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
6567 or experiencing reliability issues with single onion services, should
6570 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
6571 - Tolerate systems (including some Android installations) where
6572 madvise and MADV_DONTDUMP are available at build-time, but not at
6573 run time. Previously, these systems would notice a failed syscall
6574 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6575 - Tolerate systems (including some Linux installations) where
6576 madvise and/or MADV_DONTFORK are available at build-time, but not
6577 at run time. Previously, these systems would notice a failed
6578 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6580 o Minor features (stem tests, backport from 0.4.2.1-alpha):
6581 - Change "make test-stem" so it only runs the stem tests that use
6582 tor. This change makes test-stem faster and more reliable. Closes
6585 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
6586 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6587 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6589 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6590 - Add more stub functions to fix compilation on Android with link-
6591 time optimization when --disable-module-dirauth is used.
6592 Previously, these compilation settings would make the compiler
6593 look for functions that didn't exist. Fixes bug 31552; bugfix
6595 - Suppress spurious float-conversion warnings from GCC when calling
6596 floating-point classifier functions on FreeBSD. Fixes part of bug
6597 31687; bugfix on 0.3.1.5-alpha.
6599 o Minor bugfixes (controller protocol):
6600 - Fix the MAPADDRESS controller command to accept one or more
6601 arguments. Previously, it required two or more arguments, and ignored
6602 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6604 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6605 - When extracting an IPv6 address from a PF-based proxy, verify that
6606 we are actually configured to receive an IPv6 address, and log an
6607 internal error if not. Fixes part of bug 31687; bugfix
6610 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6611 - When tor is missing descriptors for some primary entry guards,
6612 make the log message less alarming. It's normal for descriptors to
6613 expire, as long as tor fetches new ones soon after. Fixes bug
6614 31657; bugfix on 0.3.3.1-alpha.
6616 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6617 - Change log level of message "Hash of session info was not as
6618 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6621 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6622 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6623 31463; bugfix on 0.3.5.4-alpha.
6625 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6626 - Always retry v2 single onion service intro and rend circuits with
6627 a 3-hop path. Previously, v2 single onion services used a 3-hop
6628 path when rendezvous circuits were retried after a remote or
6629 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6630 23818; bugfix on 0.2.9.3-alpha.
6632 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
6633 - Always retry v3 single onion service intro and rend circuits with
6634 a 3-hop path. Previously, v3 single onion services used a 3-hop
6635 path when rend circuits were retried after a remote or delayed
6636 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6637 bugfix on 0.3.2.1-alpha.
6638 - Make v3 single onion services fall back to a 3-hop intro, when all
6639 intro points are unreachable via a 1-hop path. Previously, v3
6640 single onion services failed when all intro nodes were unreachable
6641 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6643 o Documentation (backport from 0.4.2.1-alpha):
6644 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6645 notice.html so that operators no longer have to host it
6646 themselves. Closes ticket 31089.
6649 Changes in version 0.4.2.1-alpha - 2019-09-17
6650 This is the first alpha release in the 0.4.2.x series. It adds new
6651 defenses for denial-of-service attacks against onion services. It also
6652 includes numerous kinds of bugfixes and refactoring to help improve
6653 Tor's stability and ease of development.
6655 o Major features (onion service v3, denial of service):
6656 - Add onion service introduction denial of service defenses. Intro
6657 points can now rate-limit client introduction requests, using
6658 parameters that can be sent by the service within the
6659 ESTABLISH_INTRO cell. If the cell extension for this is not used,
6660 the intro point will honor the consensus parameters. Closes
6663 o Major bugfixes (circuit build, guard):
6664 - When considering upgrading circuits from "waiting for guard" to
6665 "open", always ignore circuits that are marked for close.
6666 Previously we could end up in the situation where a subsystem is
6667 notified of a circuit opening, but the circuit is still marked for
6668 close, leading to undesirable behavior. Fixes bug 30871; bugfix
6671 o Major bugfixes (crash, Linux, Android):
6672 - Tolerate systems (including some Android installations) where
6673 madvise and MADV_DONTDUMP are available at build-time, but not at
6674 run time. Previously, these systems would notice a failed syscall
6675 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6676 - Tolerate systems (including some Linux installations) where
6677 madvise and/or MADV_DONTFORK are available at build-time, but not
6678 at run time. Previously, these systems would notice a failed
6679 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6681 o Minor features (best practices tracker):
6682 - Our best-practices tracker now integrates with our include-checker
6683 tool to keep track of how many layering violations we have not yet
6684 fixed. We hope to reduce this number over time to improve Tor's
6685 modularity. Closes ticket 31176.
6686 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
6687 practracker from the environment. We may want this for continuous
6688 integration. Closes ticket 31309.
6689 - Give a warning rather than an error when a practracker exception
6690 is violated by a small amount, add a --list-overbroad option to
6691 practracker that lists exceptions that are stricter than they need
6692 to be, and provide an environment variable for disabling
6693 practracker. Closes ticket 30752.
6694 - Our best-practices tracker now looks at headers as well as C
6695 files. Closes ticket 31175.
6697 o Minor features (build system):
6698 - Add --disable-manpage and --disable-html-manual options to
6699 configure script. This will enable shortening build times by not
6700 building documentation. Resolves issue 19381.
6702 o Minor features (compilation):
6703 - Log a more useful error message when we are compiling and one of
6704 the compile-time hardening options we have selected can be linked
6705 but not executed. Closes ticket 27530.
6707 o Minor features (configuration):
6708 - The configuration code has been extended to allow splitting
6709 configuration data across multiple objects. Previously, all
6710 configuration data needed to be kept in a single object, which
6711 tended to become bloated. Closes ticket 31240.
6713 o Minor features (continuous integration):
6714 - When running CI builds on Travis, put some random data in
6715 ~/.torrc, to make sure no tests are reading the Tor configuration
6716 file from its default location. Resolves issue 30102.
6718 o Minor features (debugging):
6719 - Log a nonfatal assertion failure if we encounter a configuration
6720 line whose command is "CLEAR" but which has a nonempty value. This
6721 should be impossible, according to the rules of our configuration
6722 line parsing. Closes ticket 31529.
6724 o Minor features (git hooks):
6725 - Our pre-commit git hook now checks for a special file before
6726 running practracker, so that practracker only runs on branches
6727 that are based on master. Since the pre-push hook calls the pre-
6728 commit hook, practracker will also only run before pushes of
6729 branches based on master. Closes ticket 30979.
6731 o Minor features (git scripts):
6732 - Add a "--" command-line argument, to separate git-push-all.sh
6733 script arguments from arguments that are passed through to git
6734 push. Closes ticket 31314.
6735 - Add a -r <remote-name> argument to git-push-all.sh, so the script
6736 can push test branches to a personal remote. Closes ticket 31314.
6737 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
6738 git-push-all.sh, which makes these scripts create, merge forward,
6739 and push test branches. Closes ticket 31314.
6740 - Add a -u argument to git-merge-forward.sh, so that the script can
6741 re-use existing test branches after a merge failure and fix.
6742 Closes ticket 31314.
6743 - Add a TOR_GIT_PUSH env var, which sets the default git push
6744 command and arguments for git-push-all.sh. Closes ticket 31314.
6745 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
6746 script push master and maint branches with a delay between each
6747 branch. These delays trigger the CI jobs in a set order, which
6748 should show the most likely failures first. Also make pushes
6749 atomic by default, and make the script pass any command-line
6750 arguments to git push. Closes ticket 29879.
6751 - Call the shellcheck script from the pre-commit hook. Closes
6753 - Skip pushing test branches that are the same as a remote
6754 maint/release/master branch in git-push-all.sh by default. Add a
6755 -s argument, so git-push-all.sh can push all test branches. Closes
6758 o Minor features (IPv6, logging):
6759 - Log IPv6 addresses as well as IPv4 addresses when describing
6760 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
6762 o Minor features (onion service v3):
6763 - Do not allow single hop clients to fetch or post an HS descriptor
6764 from an HSDir. Closes ticket 24964.
6766 o Minor features (onion service):
6767 - Disallow single-hop clients at the introduction point. We've
6768 removed Tor2web support a while back and single-hop rendezvous
6769 attempts are blocked at the relays. This change should remove load
6770 off the network from spammy clients. Close ticket 24963.
6772 o Minor features (stem tests):
6773 - Change "make test-stem" so it only runs the stem tests that use
6774 tor. This change makes test-stem faster and more reliable. Closes
6777 o Minor features (testing):
6778 - Add a script to invoke "tor --dump-config" and "tor
6779 --verify-config" with various configuration options, and see
6780 whether tor's resulting configuration or error messages are what
6781 we expect. Use it for integration testing of our +Option and
6782 /Option flags. Closes ticket 31637.
6783 - Improve test coverage for our existing configuration parsing and
6784 management API. Closes ticket 30893.
6785 - Add integration tests to make sure that practracker gives the
6786 outputs we expect. Closes ticket 31477.
6787 - The practracker self-tests are now run as part of the Tor test
6788 suite. Closes ticket 31304.
6790 o Minor features (token bucket):
6791 - Implement a generic token bucket that uses a single counter, for
6792 use in anti-DoS onion service work. Closes ticket 30687.
6794 o Minor bugfixes (best practices tracker):
6795 - Fix a few issues in the best-practices script, including tests,
6796 tab tolerance, error reporting, and directory-exclusion logic.
6797 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
6798 - When running check-best-practices, only consider files in the src
6799 subdirectory. Previously we had recursively considered all
6800 subdirectories, which made us get confused by the temporary
6801 directories made by "make distcheck". Fixes bug 31578; bugfix
6804 o Minor bugfixes (build system):
6805 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6806 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6808 o Minor bugfixes (chutney, makefiles, documentation):
6809 - "make test-network-all" now shows the warnings from each test-
6810 network.sh run on the console, so developers see new warnings
6811 early. We've also improved the documentation for this feature, and
6812 renamed a Makefile variable so the code is self-documenting. Fixes
6813 bug 30455; bugfix on 0.3.0.4-rc.
6815 o Minor bugfixes (compilation):
6816 - Add more stub functions to fix compilation on Android with link-
6817 time optimization when --disable-module-dirauth is used.
6818 Previously, these compilation settings would make the compiler
6819 look for functions that didn't exist. Fixes bug 31552; bugfix
6821 - Suppress spurious float-conversion warnings from GCC when calling
6822 floating-point classifier functions on FreeBSD. Fixes part of bug
6823 31687; bugfix on 0.3.1.5-alpha.
6825 o Minor bugfixes (configuration):
6826 - Invalid floating-point values in the configuration file are now
6827 treated as errors in the configuration. Previously, they were
6828 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
6830 o Minor bugfixes (coverity):
6831 - Add an assertion when parsing a BEGIN cell so that coverity can be
6832 sure that we are not about to dereference a NULL address. Fixes
6833 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
6834 - In our siphash implementation, when building for coverity, use
6835 memcpy in place of a switch statement, so that coverity can tell
6836 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
6837 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
6838 - Fix several coverity warnings from our unit tests. Fixes bug
6839 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
6841 o Minor bugfixes (developer tooling):
6842 - Only log git script changes in the post-merge script when the
6843 merge was to the master branch. Fixes bug 31040; bugfix
6846 o Minor bugfixes (directory authorities):
6847 - Return a distinct status when formatting annotations fails. Fixes
6848 bug 30780; bugfix on 0.2.0.8-alpha.
6850 o Minor bugfixes (error handling):
6851 - On abort, try harder to flush the output buffers of log messages.
6852 On some platforms (macOS), log messages could be discarded when
6853 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6854 - Report the tor version whenever an assertion fails. Previously, we
6855 only reported the Tor version on some crashes, and some non-fatal
6856 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6857 - When tor aborts due to an error, close log file descriptors before
6858 aborting. Closing the logs makes some OSes flush log file buffers,
6859 rather than deleting buffered log lines. Fixes bug 31594; bugfix
6862 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
6863 - When extracting an IPv6 address from a PF-based proxy, verify that
6864 we are actually configured to receive an IPv6 address, and log an
6865 internal error if not. Fixes part of bug 31687; bugfix
6868 o Minor bugfixes (git hooks):
6869 - Remove a duplicate call to practracker from the pre-push hook. The
6870 pre-push hook already calls the pre-commit hook, which calls
6871 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
6873 o Minor bugfixes (git scripts):
6874 - Stop hard-coding the bash path in the git scripts. Some OSes don't
6875 have bash in /usr/bin, others have an ancient bash at this path.
6876 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
6877 - Stop hard-coding the tor master branch name and worktree path in
6878 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
6879 - Allow git-push-all.sh to be run from any directory. Previously,
6880 the script only worked if run from an upstream worktree directory.
6881 Closes ticket 31678.
6883 o Minor bugfixes (guards):
6884 - When tor is missing descriptors for some primary entry guards,
6885 make the log message less alarming. It's normal for descriptors to
6886 expire, as long as tor fetches new ones soon after. Fixes bug
6887 31657; bugfix on 0.3.3.1-alpha.
6889 o Minor bugfixes (ipv6):
6890 - Check for private IPv6 addresses alongside their IPv4 equivalents
6891 when authorities check descriptors. Previously, we only checked
6892 for private IPv4 addresses. Fixes bug 31088; bugfix on
6893 0.2.3.21-rc. Patch by Neel Chauhan.
6894 - When parsing microdescriptors, we should check the IPv6 exit
6895 policy alongside IPv4. Previously, we checked both exit policies
6896 for only router info structures, while microdescriptors were
6897 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
6900 o Minor bugfixes (logging):
6901 - Change log level of message "Hash of session info was not as
6902 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6904 - Fix a code issue that would have broken our parsing of log domains
6905 as soon as we had 33 of them. Fortunately, we still only have 29.
6906 Fixes bug 31451; bugfix on 0.4.1.4-rc.
6908 o Minor bugfixes (memory management):
6909 - Stop leaking a small amount of memory in nt_service_install(), in
6910 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
6913 o Minor bugfixes (networking, IP addresses):
6914 - When parsing addresses via Tor's internal DNS lookup API, reject
6915 IPv4 addresses in square brackets, and accept IPv6 addresses in
6916 square brackets. This change completes the work started in 23082,
6917 making address parsing consistent between tor's internal DNS
6918 lookup and address parsing APIs. Fixes bug 30721; bugfix
6920 - When parsing addresses via Tor's internal address:port parsing and
6921 DNS lookup APIs, require IPv6 addresses with ports to have square
6922 brackets. But allow IPv6 addresses without ports, whether or not
6923 they have square brackets. Fixes bug 30721; bugfix
6926 o Minor bugfixes (onion service v3):
6927 - When purging the client descriptor cache, close any introduction
6928 point circuits associated with purged cache entries. This avoids
6929 picking those circuits later when connecting to the same
6930 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
6932 o Minor bugfixes (onion services):
6933 - In the hs_ident_circuit_t data structure, remove the unused field
6934 circuit_type and the respective argument in hs_ident_circuit_new().
6935 This field was set by clients (for introduction) and services (for
6936 introduction and rendezvous) but was never used afterwards. Fixes
6937 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
6939 o Minor bugfixes (operator tools):
6940 - Make tor-print-ed-signing-cert(1) print certificate expiration
6941 date in RFC 1123 and UNIX timestamp formats, to make output
6942 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
6944 o Minor bugfixes (rust):
6945 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6946 31463; bugfix on 0.3.5.4-alpha.
6947 - Raise the minimum rustc version to 1.31.0, as checked by configure
6948 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
6950 o Minor bugfixes (sendme, code structure):
6951 - Rename the trunnel SENDME file definition from sendme.trunnel to
6952 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
6953 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
6955 o Minor bugfixes (statistics):
6956 - Stop removing the ed25519 signature if the extra info file is too
6957 big. If the signature data was removed, but the keyword was kept,
6958 this could result in an unparseable extra info file. Fixes bug
6959 30958; bugfix on 0.2.7.2-alpha.
6961 o Minor bugfixes (subsystems):
6962 - Make the subsystem init order match the subsystem module
6963 dependencies. Call windows process security APIs as early as
6964 possible. Initialize logging before network and time, so that
6965 network and time can use logging. Fixes bug 31615; bugfix
6968 o Minor bugfixes (testing):
6969 - Teach the util/socketpair_ersatz test to work correctly when we
6970 have no network stack configured. Fixes bug 30804; bugfix
6973 o Minor bugfixes (v2 single onion services):
6974 - Always retry v2 single onion service intro and rend circuits with
6975 a 3-hop path. Previously, v2 single onion services used a 3-hop
6976 path when rendezvous circuits were retried after a remote or
6977 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6978 23818; bugfix on 0.2.9.3-alpha.
6980 o Minor bugfixes (v3 single onion services):
6981 - Always retry v3 single onion service intro and rend circuits with
6982 a 3-hop path. Previously, v3 single onion services used a 3-hop
6983 path when rend circuits were retried after a remote or delayed
6984 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6985 bugfix on 0.3.2.1-alpha.
6986 - Make v3 single onion services fall back to a 3-hop intro, when all
6987 intro points are unreachable via a 1-hop path. Previously, v3
6988 single onion services failed when all intro nodes were unreachable
6989 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6992 - Improve documentation in circuit padding subsystem. Patch by
6993 Tobias Pulls. Closes ticket 31113.
6994 - Include an example usage for IPv6 ORPort in our sample torrc.
6995 Closes ticket 31320; patch from Ali Raheem.
6996 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6997 notice.html so that operators no longer have to host it
6998 themselves. Closes ticket 31089.
7001 - No longer include recommended package digests in votes as detailed
7002 in proposal 301. The RecommendedPackages torrc option is
7003 deprecated and will no longer have any effect. "package" lines
7004 will still be considered when computing consensuses for consensus
7005 methods that include them. (This change has no effect on the list
7006 of recommended Tor versions, which is still in use.) Closes
7008 - Remove torctl.in from contrib/dist directory. Resolves
7012 - Run shellcheck for all non-third-party shell scripts that are
7013 shipped with Tor. Closes ticket 29533.
7014 - When checking shell scripts, ignore any user-created directories.
7015 Closes ticket 30967.
7017 o Code simplification and refactoring (config handling):
7018 - Extract our variable manipulation code from confparse.c to a new
7019 lower-level typedvar.h module. Closes ticket 30864.
7020 - Lower another layer of object management from confparse.c to a
7021 more general tool. Now typed structure members are accessible via
7022 an abstract type. Implements ticket 30914.
7023 - Move our backend logic for working with configuration and state
7024 files into a lower-level library, since it no longer depends on
7025 any tor-specific functionality. Closes ticket 31626.
7026 - Numerous simplifications in configuration-handling logic: remove
7027 duplicated macro definitions, replace magical names with flags,
7028 and refactor "TestingTorNetwork" to use the same default-option
7029 logic as the rest of Tor. Closes ticket 30935.
7030 - Replace our ad-hoc set of flags for configuration variables and
7031 configuration variable types with fine-grained orthogonal flags
7032 corresponding to the actual behavior we want. Closes ticket 31625.
7034 o Code simplification and refactoring (misc):
7035 - Eliminate some uses of lower-level control reply abstractions,
7036 primarily in the onion_helper functions. Closes ticket 30889.
7037 - Rework bootstrap tracking to use the new publish-subscribe
7038 subsystem. Closes ticket 29976.
7039 - Rewrite format_node_description() and router_get_verbose_nickname()
7040 to use strlcpy() and strlcat(). The previous implementation used
7041 memcpy() and pointer arithmetic, which was error-prone. Closes
7042 ticket 31545. This is CID 1452819.
7043 - Split extrainfo_dump_to_string() into smaller functions. Closes
7045 - Use the ptrdiff_t type consistently for expressing variable
7046 offsets and pointer differences. Previously we incorrectly (but
7047 harmlessly) used int and sometimes off_t for these cases. Closes
7049 - Use the subsystems mechanism to manage the main event loop code.
7050 Closes ticket 30806.
7051 - Various simplifications and minor improvements to the circuit
7052 padding machines. Patch by Tobias Pulls. Closes tickets 31112
7055 o Documentation (hard-coded directories):
7056 - Improve the documentation for the DirAuthority and FallbackDir
7057 torrc options. Closes ticket 30955.
7059 o Documentation (tor.1 man page):
7060 - Fix typo in tor.1 man page: the option is "--help", not "-help".
7061 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
7064 Changes in version 0.4.1.5 - 2019-08-20
7065 This is the first stable release in the 0.4.1.x series. This series
7066 adds experimental circuit-level padding, authenticated SENDME cells to
7067 defend against certain attacks, and several performance improvements
7068 to save on CPU consumption. It fixes bugs in bootstrapping and v3
7069 onion services. It also includes numerous smaller features and
7070 bugfixes on earlier versions.
7072 Per our support policy, we will support the 0.4.1.x series for nine
7073 months, or until three months after the release of a stable 0.4.2.x:
7074 whichever is longer. If you need longer-term support, please stick
7075 with 0.3.5.x, which will we plan to support until Feb 2022.
7077 Below are the changes since 0.4.1.4-rc. For a complete list of changes
7078 since 0.4.0.5, see the ReleaseNotes file.
7080 o Directory authority changes:
7081 - The directory authority "dizum" has a new IP address. Closes
7084 o Minor features (circuit padding logging):
7085 - Demote noisy client-side warn logs about circuit padding to
7086 protocol warnings. Add additional log messages and circuit ID
7087 fields to help with bug 30992 and any other future issues.
7089 o Minor bugfixes (circuit padding negotiation):
7090 - Bump the circuit padding protocol version to explicitly signify
7091 that the HS setup machine support is finalized in 0.4.1.x-stable.
7092 This also means that 0.4.1.x-alpha clients will not negotiate
7093 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
7094 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
7095 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
7097 o Minor bugfixes (circuit padding):
7098 - Ignore non-padding cells on padding circuits. This addresses
7099 various warning messages from subsystems that were not expecting
7100 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
7102 o Minor bugfixes (clock skew detection):
7103 - Don't believe clock skew results from NETINFO cells that appear to
7104 arrive before we sent the VERSIONS cells they are responding to.
7105 Previously, we would accept them up to 3 minutes "in the past".
7106 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
7108 o Minor bugfixes (compatibility, standards compliance):
7109 - Fix a bug that would invoke undefined behavior on certain
7110 operating systems when trying to asprintf() a string exactly
7111 INT_MAX bytes long. We don't believe this is exploitable, but it's
7112 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
7113 Found and fixed by Tobias Stoeckmann.
7115 o Minor bugfixes (compilation warning):
7116 - Fix a compilation warning on Windows about casting a function
7117 pointer for GetTickCount64(). Fixes bug 31374; bugfix
7120 o Minor bugfixes (compilation):
7121 - Avoid using labs() on time_t, which can cause compilation warnings
7122 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
7124 o Minor bugfixes (distribution):
7125 - Do not ship any temporary files found in the
7126 scripts/maint/practracker directory. Fixes bug 31311; bugfix
7129 o Testing (continuous integration):
7130 - In Travis, make stem log a controller trace to the console, and
7131 tail stem's tor log after failure. Closes ticket 30591.
7132 - In Travis, only run the stem tests that use a tor binary. Closes
7136 Changes in version 0.4.1.4-rc - 2019-07-25
7137 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
7138 updates to a new list of fallback directories. If no new bugs are
7139 found, the next release in the 0.4.1.x serious should be stable.
7141 o Major bugfixes (circuit build, guard):
7142 - When considering upgrading circuits from "waiting for guard" to
7143 "open", always ignore circuits that are marked for close. Otherwise,
7144 we can end up in the situation where a subsystem is notified that
7145 a closing circuit has just opened, leading to undesirable
7146 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
7148 o Minor features (continuous integration):
7149 - Our Travis configuration now uses Chutney to run some network
7150 integration tests automatically. Closes ticket 29280.
7152 o Minor features (fallback directory list):
7153 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
7154 in December 2018 (of which ~122 were still functional), with a
7155 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
7156 in June 2019. Closes ticket 28795.
7158 o Minor bugfixes (circuit padding):
7159 - On relays, properly check that a padding machine is absent before
7160 logging a warning about it being absent. Fixes bug 30649; bugfix
7162 - Add two NULL checks in unreachable places to silence Coverity (CID
7163 144729 and 1447291) and better future-proof ourselves. Fixes bug
7164 31024; bugfix on 0.4.1.1-alpha.
7166 o Minor bugfixes (crash on exit):
7167 - Avoid a set of possible code paths that could try to use freed
7168 memory in routerlist_free() while Tor was exiting. Fixes bug
7169 31003; bugfix on 0.1.2.2-alpha.
7171 o Minor bugfixes (logging):
7172 - Fix a conflict between the flag used for messaging-domain log
7173 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
7176 o Minor bugfixes (memory leaks):
7177 - Fix a trivial memory leak when parsing an invalid value from a
7178 download schedule in the configuration. Fixes bug 30894; bugfix
7181 o Code simplification and refactoring:
7182 - Remove some dead code from circpad_machine_remove_token() to fix
7183 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
7187 Changes in version 0.4.1.3-alpha - 2019-06-25
7188 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
7189 alpha, most of them from earlier release series.
7191 o Major bugfixes (Onion service reachability):
7192 - Properly clean up the introduction point map when circuits change
7193 purpose from onion service circuits to pathbias, measurement, or
7194 other circuit types. This should fix some service-side instances
7195 of introduction point failure. Fixes bug 29034; bugfix
7198 o Minor features (geoip):
7199 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
7200 Country database. Closes ticket 30852.
7202 o Minor features (logging):
7203 - Give a more useful assertion failure message if we think we have
7204 minherit() but we fail to make a region non-inheritable. Give a
7205 compile-time warning if our support for minherit() is incomplete.
7206 Closes ticket 30686.
7208 o Minor bugfixes (circuit isolation):
7209 - Fix a logic error that prevented the SessionGroup sub-option from
7210 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
7212 o Minor bugfixes (continuous integration):
7213 - Allow the test-stem job to fail in Travis, because it sometimes
7214 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
7215 - Skip test_rebind on macOS in Travis, because it is unreliable on
7216 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
7217 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
7218 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
7220 o Minor bugfixes (directory authorities):
7221 - Stop crashing after parsing an unknown descriptor purpose
7222 annotation. We think this bug can only be triggered by modifying a
7223 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
7225 o Minor bugfixes (pluggable transports):
7226 - When running as a bridge with pluggable transports, always publish
7227 pluggable transport information in our extrainfo descriptor, even
7228 if ExtraInfoStatistics is 0. This information is needed by
7229 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
7232 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
7233 Closes ticket 30630.
7236 Changes in version 0.4.1.2-alpha - 2019-06-06
7237 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
7238 previous alpha, and some much older. It also contains minor testing
7239 improvements, and an improvement to the security of our authenticated
7240 SENDME implementation.
7242 o Major bugfixes (bridges):
7243 - Consider our directory information to have changed when our list
7244 of bridges changes. Previously, Tor would not re-compute the
7245 status of its directory information when bridges changed, and
7246 therefore would not realize that it was no longer able to build
7247 circuits. Fixes part of bug 29875.
7248 - Do not count previously configured working bridges towards our
7249 total of working bridges. Previously, when Tor's list of bridges
7250 changed, it would think that the old bridges were still usable,
7251 and delay fetching router descriptors for the new ones. Fixes part
7252 of bug 29875; bugfix on 0.3.0.1-alpha.
7254 o Major bugfixes (flow control, SENDME):
7255 - Decrement the stream-level package window after packaging a cell.
7256 Previously, it was done inside a log_debug() call, meaning that if
7257 debug logs were not enabled, the decrement would never happen, and
7258 thus the window would be out of sync with the other end point.
7259 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
7261 o Major bugfixes (onion service reachability):
7262 - Properly clean up the introduction point map and associated state
7263 when circuits change purpose from onion service circuits to
7264 pathbias, measurement, or other circuit types. This may fix some
7265 instances of introduction point failure. Fixes bug 29034; bugfix
7268 o Minor features (authenticated SENDME):
7269 - Ensure that there is enough randomness on every circuit to prevent
7270 an attacker from successfully predicting the hashes they will need
7271 to include in authenticated SENDME cells. At a random interval, if
7272 we have not sent randomness already, we now leave some extra space
7273 at the end of a cell that we can fill with random bytes. Closes
7276 o Minor features (continuous integration):
7277 - When running coverage builds on Travis, we now set
7278 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
7281 o Minor features (maintenance):
7282 - Add a new "make autostyle" target that developers can use to apply
7283 all automatic Tor style and consistency conversions to the
7284 codebase. Closes ticket 30539.
7286 o Minor features (testing):
7287 - The circuitpadding tests now use a reproducible RNG implementation,
7288 so that if a test fails, we can learn why. Part of ticket 28878.
7289 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
7290 to set the RNG seed for tests that use a reproducible RNG. Part of
7292 - When running tests in coverage mode, take additional care to make
7293 our coverage deterministic, so that we can accurately track
7294 changes in code coverage. Closes ticket 30519.
7296 o Minor bugfixes (configuration, proxies):
7297 - Fix a bug that prevented us from supporting SOCKS5 proxies that
7298 want authentication along with configured (but unused!)
7299 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
7301 o Minor bugfixes (controller):
7302 - POSTDESCRIPTOR requests should work again. Previously, they were
7303 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
7305 - Repair the HSFETCH command so that it works again. Previously, it
7306 expected a body when it shouldn't have. Fixes bug 30646; bugfix
7309 o Minor bugfixes (developer tooling):
7310 - Fix pre-push hook to allow fixup and squash commits when pushing
7311 to non-upstream git remote. Fixes bug 30286; bugfix
7314 o Minor bugfixes (directory authority):
7315 - Move the "bandwidth-file-headers" line in directory authority
7316 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
7319 o Minor bugfixes (NetBSD):
7320 - Fix usage of minherit() on NetBSD and other platforms that define
7321 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
7322 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
7324 o Minor bugfixes (out-of-memory handler):
7325 - When purging the DNS cache because of an out-of-memory condition,
7326 try purging just the older entries at first. Previously, we would
7327 always purge the whole thing. Fixes bug 29617; bugfix
7330 o Minor bugfixes (portability):
7331 - Avoid crashing in our tor_vasprintf() implementation on systems
7332 that define neither vasprintf() nor _vscprintf(). (This bug has
7333 been here long enough that we question whether people are running
7334 Tor on such systems, but we're applying the fix out of caution.)
7335 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
7338 o Minor bugfixes (shutdown, libevent, memory safety):
7339 - Avoid use-after-free bugs when shutting down, by making sure that
7340 we shut down libevent only after shutting down all of its users.
7341 We believe these are harmless in practice, since they only occur
7342 on the shutdown path, and do not involve any attacker-controlled
7343 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
7345 o Minor bugfixes (static analysis):
7346 - Fix several spurious Coverity warnings about the unit tests, to
7347 lower our chances of missing real warnings in the future. Fixes
7348 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
7351 - Specify torrc paths (with empty files) when launching tor in
7352 integration tests; refrain from reading user and system torrcs.
7353 Resolves issue 29702.
7356 Changes in version 0.4.1.1-alpha - 2019-05-22
7357 This is the first alpha in the 0.4.1.x series. It introduces
7358 lightweight circuit padding to make some onion-service circuits harder
7359 to distinguish, includes a new "authenticated SENDME" feature to make
7360 certain denial-of-service attacks more difficult, and improves
7361 performance in several areas.
7363 o Major features (circuit padding):
7364 - Onion service clients now add padding cells at the start of their
7365 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
7366 look more like general purpose Exit traffic. The overhead for this
7367 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
7368 extra upstream cell and 10 downstream cells for INTRODUCE
7369 circuits. This feature is only enabled when also supported by the
7370 circuit's middle node. (Clients may specify fixed middle nodes
7371 with the MiddleNodes option, and may force-disable this feature
7372 with the CircuitPadding option.) Closes ticket 28634.
7374 o Major features (code organization):
7375 - Tor now includes a generic publish-subscribe message-passing
7376 subsystem that we can use to organize intermodule dependencies. We
7377 hope to use this to reduce dependencies between modules that don't
7378 need to be related, and to generally simplify our codebase. Closes
7381 o Major features (controller protocol):
7382 - Controller commands are now parsed using a generalized parsing
7383 subsystem. Previously, each controller command was responsible for
7384 parsing its own input, which led to strange inconsistencies.
7385 Closes ticket 30091.
7387 o Major features (flow control):
7388 - Implement authenticated SENDMEs as detailed in proposal 289. A
7389 SENDME cell now includes the digest of the traffic that it
7390 acknowledges, so that once an end point receives the SENDME, it
7391 can confirm the other side's knowledge of the previous cells that
7392 were sent, and prevent certain types of denial-of-service attacks.
7393 This behavior is controlled by two new consensus parameters: see
7394 the proposal for more details. Fixes ticket 26288.
7396 o Major features (performance):
7397 - Our node selection algorithm now excludes nodes in linear time.
7398 Previously, the algorithm was quadratic, which could slow down
7399 heavily used onion services. Closes ticket 30307.
7401 o Major features (performance, RNG):
7402 - Tor now constructs a fast secure pseudorandom number generator for
7403 each thread, to use when performance is critical. This PRNG is
7404 based on AES-CTR, using a buffering construction similar to
7405 libottery and the (newer) OpenBSD arc4random() code. It
7406 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
7407 small outputs. Although we believe it to be cryptographically
7408 strong, we are only using it when necessary for performance.
7409 Implements tickets 29023 and 29536.
7411 o Major bugfixes (onion service v3):
7412 - Fix an unreachable bug in which an introduction point could try to
7413 send an INTRODUCE_ACK with a status code that Trunnel would refuse
7414 to encode, leading the relay to assert(). We've consolidated the
7415 ABI values into Trunnel now. Fixes bug 30454; bugfix
7417 - Clients can now handle unknown status codes from INTRODUCE_ACK
7418 cells. (The NACK behavior will stay the same.) This will allow us
7419 to extend status codes in the future without breaking the normal
7420 client behavior. Fixes another part of bug 30454; bugfix
7423 o Minor features (circuit padding):
7424 - We now use a fast PRNG when scheduling circuit padding. Part of
7426 - Allow the padding machine designer to pick the edges of their
7427 histogram instead of trying to compute them automatically using an
7428 exponential formula. Resolves some undefined behavior in the case
7429 of small histograms and allows greater flexibility on machine
7430 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
7431 - Allow circuit padding machines to hold a circuit open until they
7432 are done padding it. Closes ticket 28780.
7434 o Minor features (compile-time modules):
7435 - Add a "--list-modules" command to print a list of which compile-
7436 time modules are enabled. Closes ticket 30452.
7438 o Minor features (continuous integration):
7439 - Remove sudo configuration lines from .travis.yml as they are no
7440 longer needed with current Travis build environment. Resolves
7442 - In Travis, show stem's tor log after failure. Closes ticket 30234.
7444 o Minor features (controller):
7445 - Add onion service version 3 support to the HSFETCH command.
7446 Previously, only version 2 onion services were supported. Closes
7447 ticket 25417. Patch by Neel Chauhan.
7449 o Minor features (debugging):
7450 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
7451 logging of additional information during assert failure. Now we
7452 can use format strings to include information for trouble
7453 shooting. Resolves ticket 29662.
7455 o Minor features (defense in depth):
7456 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
7457 case a bug causes them to be used later. Closes ticket 30176.
7458 Patch from Tobias Stoeckmann.
7459 - Tor now uses a cryptographically strong PRNG even for decisions
7460 that we do not believe are security-sensitive. Previously, for
7461 performance reasons, we had used a trivially predictable linear
7462 congruential generator algorithm for certain load-balancing and
7463 statistical sampling decisions. Now we use our fast RNG in those
7464 cases. Closes ticket 29542.
7466 o Minor features (developer tools):
7467 - Tor's "practracker" test script now checks for files and functions
7468 that seem too long and complicated. Existing overlong functions
7469 and files are accepted for now, but should eventually be
7470 refactored. Closes ticket 29221.
7471 - Add some scripts used for git maintenance to scripts/git. Closes
7473 - Call practracker from pre-push and pre-commit git hooks to let
7474 developers know if they made any code style violations. Closes
7476 - Add a script to check that each header has a well-formed and
7477 unique guard macro. Closes ticket 29756.
7479 o Minor features (geoip):
7480 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
7481 Country database. Closes ticket 30522.
7483 o Minor features (HTTP tunnel):
7484 - Return an informative web page when the HTTPTunnelPort is used as
7485 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
7487 o Minor features (IPv6, v3 onion services):
7488 - Make v3 onion services put IPv6 addresses in service descriptors.
7489 Before this change, service descriptors only contained IPv4
7490 addresses. Implements 26992.
7492 o Minor features (modularity):
7493 - The "--disable-module-dirauth" compile-time option now disables
7494 even more dirauth-only code. Closes ticket 30345.
7496 o Minor features (performance):
7497 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
7498 1.1.1 and later), since they tend to be faster than tiny-keccak.
7499 Closes ticket 28837.
7501 o Minor features (testing):
7502 - Tor's unit test code now contains helper functions to replace the
7503 PRNG with a deterministic or reproducible version for testing.
7504 Previously, various tests implemented this in various ways.
7505 Implements ticket 29732.
7506 - We now have a script, cov-test-determinism.sh, to identify places
7507 where our unit test coverage has become nondeterministic. Closes
7509 - Check that representative subsets of values of `int` and `unsigned
7510 int` can be represented by `void *`. Resolves issue 29537.
7512 o Minor bugfixes (bridge authority):
7513 - Bridge authorities now set bridges as running or non-running when
7514 about to dump their status to a file. Previously, they set bridges
7515 as running in response to a GETINFO command, but those shouldn't
7516 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
7517 Patch by Neel Chauhan.
7519 o Minor bugfixes (channel padding statistics):
7520 - Channel padding write totals and padding-enabled totals are now
7521 counted properly in relay extrainfo descriptors. Fixes bug 29231;
7522 bugfix on 0.3.1.1-alpha.
7524 o Minor bugfixes (circuit padding):
7525 - Add a "CircuitPadding" torrc option to disable circuit padding.
7526 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
7527 - Allow circuit padding machines to specify that they do not
7528 contribute much overhead, and provide consensus flags and torrc
7529 options to force clients to only use these low overhead machines.
7530 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
7531 - Provide a consensus parameter to fully disable circuit padding, to
7532 be used in emergency network overload situations. Fixes bug 30173;
7533 bugfix on 0.4.0.1-alpha.
7534 - The circuit padding subsystem will no longer schedule padding if
7535 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
7536 - Inspect a circuit-level cell queue before sending padding, to
7537 avoid sending padding while too much data is already queued. Fixes
7538 bug 29204; bugfix on 0.4.0.1-alpha.
7539 - Avoid calling monotime_absolute_usec() in circuit padding machines
7540 that do not use token removal or circuit RTT estimation. Fixes bug
7541 29085; bugfix on 0.4.0.1-alpha.
7543 o Minor bugfixes (compilation, unusual configurations):
7544 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
7545 due to missing declarations of abort(), and prevent other such
7546 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
7548 o Minor bugfixes (controller protocol):
7549 - Teach the controller parser to distinguish an object preceded by
7550 an argument list from one without. Previously, it couldn't
7551 distinguish an argument list from the first line of a multiline
7552 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
7554 o Minor bugfixes (directory authority, ipv6):
7555 - Directory authorities with IPv6 support now always mark themselves
7556 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
7557 Patch by Neel Chauhan.
7559 o Minor bugfixes (documentation):
7560 - Improve the documentation for using MapAddress with ".exit". Fixes
7561 bug 30109; bugfix on 0.1.0.1-rc.
7562 - Improve the monotonic time module and function documentation to
7563 explain what "monotonic" actually means, and document some results
7564 that have surprised people. Fixes bug 29640; bugfix
7566 - Use proper formatting when providing an example on quoting options
7567 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
7569 o Minor bugfixes (logging):
7570 - Do not log a warning when running with an OpenSSL version other
7571 than the one Tor was compiled with, if the two versions should be
7572 compatible. Previously, we would warn whenever the version was
7573 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
7574 - Warn operators when the MyFamily option is set but ContactInfo is
7575 missing, as the latter should be set too. Fixes bug 25110; bugfix
7578 o Minor bugfixes (memory leak):
7579 - Avoid a minor memory leak that could occur on relays when failing
7580 to create a "keys" directory. Fixes bug 30148; bugfix
7583 o Minor bugfixes (onion services):
7584 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
7585 implementation) when failing to load an onion service client
7586 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
7587 - When refusing to launch a controller's HSFETCH request because of
7588 rate-limiting, respond to the controller with a new response,
7589 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
7590 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
7592 - When relaunching a circuit to a rendezvous service, mark the
7593 circuit as needing high-uptime routers as appropriate. Fixes bug
7594 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
7595 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
7596 (IPv6 support for v3 onion services is still incomplete: see
7597 ticket 23493 for details.) Fixes bug 23588; bugfix on
7598 0.3.2.1-alpha. Patch by Neel Chauhan.
7600 o Minor bugfixes (onion services, performance):
7601 - When building circuits to onion services, call tor_addr_parse()
7602 less often. Previously, we called tor_addr_parse() in
7603 circuit_is_acceptable() even if its output wasn't used. This
7604 change should improve performance when building circuits. Fixes
7605 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
7607 o Minor bugfixes (performance):
7608 - When checking whether a node is a bridge, use a fast check to make
7609 sure that its identity is set. Previously, we used a constant-time
7610 check, which is not necessary in this case. Fixes bug 30308;
7611 bugfix on 0.3.5.1-alpha.
7613 o Minor bugfixes (pluggable transports):
7614 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
7615 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
7617 o Minor bugfixes (probability distributions):
7618 - Refactor and improve parts of the probability distribution code
7619 that made Coverity complain. Fixes bug 29805; bugfix
7622 o Minor bugfixes (python):
7623 - Stop assuming that /usr/bin/python3 exists. For scripts that work
7624 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
7625 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
7627 o Minor bugfixes (relay):
7628 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
7629 is auto, act as if ExitRelay is 1. Previously, we would ignore
7630 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
7631 0.3.5.1-alpha. Patch by Neel Chauhan.
7633 o Minor bugfixes (stats):
7634 - When ExtraInfoStatistics is 0, stop including bandwidth usage
7635 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
7636 bridge statistics by country in extra-info documents. Fixes bug
7637 29018; bugfix on 0.2.4.1-alpha.
7639 o Minor bugfixes (testing):
7640 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
7641 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
7642 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
7643 - Fix some incorrect code in the v3 onion service unit tests. Fixes
7644 bug 29243; bugfix on 0.3.2.1-alpha.
7645 - In the "routerkeys/*" tests, check the return values of mkdir()
7646 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
7647 Found by Coverity as CID 1444254.
7648 - Split test_utils_general() into several smaller test functions.
7649 This makes it easier to perform resource deallocation on assert
7650 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
7651 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
7653 o Minor bugfixes (tor-resolve):
7654 - Fix a memory leak in tor-resolve that could happen if Tor gave it
7655 a malformed SOCKS response. (Memory leaks in tor-resolve don't
7656 actually matter, but it's good to fix them anyway.) Fixes bug
7657 30151; bugfix on 0.4.0.1-alpha.
7659 o Code simplification and refactoring:
7660 - Abstract out the low-level formatting of replies on the control
7661 port. Implements ticket 30007.
7662 - Add several assertions in an attempt to fix some Coverity
7663 warnings. Closes ticket 30149.
7664 - Introduce a connection_dir_buf_add() helper function that checks
7665 for compress_state of dir_connection_t and automatically writes a
7666 string to directory connection with or without compression.
7667 Resolves issue 28816.
7668 - Make the base32_decode() API return the number of bytes written,
7669 for consistency with base64_decode(). Closes ticket 28913.
7670 - Move most relay-only periodic events out of mainloop.c into the
7671 relay subsystem. Closes ticket 30414.
7672 - Refactor and encapsulate parts of the codebase that manipulate
7673 crypt_path_t objects. Resolves issue 30236.
7674 - Refactor several places in our code that Coverity incorrectly
7675 believed might have memory leaks. Closes ticket 30147.
7676 - Remove redundant return values in crypto_format, and the
7677 associated return value checks elsewhere in the code. Make the
7678 implementations in crypto_format consistent, and remove redundant
7679 code. Resolves ticket 29660.
7680 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
7681 it is not a constant-time function. Closes ticket 30309.
7682 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
7683 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
7684 bugfix on 0.3.2.1-alpha.
7685 - Simplify v3 onion service link specifier handling code. Fixes bug
7686 23576; bugfix on 0.3.2.1-alpha.
7687 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
7688 code. Resolves ticket 29108.
7689 - Split control.c into several submodules, in preparation for
7690 distributing its current responsibilities throughout the codebase.
7691 Closes ticket 29894.
7692 - Start to move responsibility for knowing about periodic events to
7693 the appropriate subsystems, so that the mainloop doesn't need to
7694 know all the periodic events in the rest of the codebase.
7695 Implements tickets 30293 and 30294.
7698 - Document how to find git commits and tags for bug fixes in
7699 CodingStandards.md. Update some file documentation. Closes
7703 - Remove the linux-tor-prio.sh script from contrib/operator-tools
7704 directory. Resolves issue 29434.
7705 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
7706 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
7709 o Code simplification and refactoring (shell scripts):
7710 - Clean up many of our shell scripts to fix shellcheck warnings.
7711 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
7712 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
7713 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
7714 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
7715 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
7716 nagios-check-tor-authority-cert (ticket 29071),
7717 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
7718 (ticket 29060), test_key_expiration.sh (ticket 30002),
7719 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
7722 o Testing (chutney):
7723 - In "make test-network-all", test IPv6-only v3 single onion
7724 services, using the chutney network single-onion-v23-ipv6-md.
7725 Closes ticket 27251.
7728 Changes in version 0.4.0.5 - 2019-05-02
7729 This is the first stable release in the 0.4.0.x series. It contains
7730 improvements for power management and bootstrap reporting, as well as
7731 preliminary backend support for circuit padding to prevent some kinds
7732 of traffic analysis. It also continues our work in refactoring Tor for
7733 long-term maintainability.
7735 Per our support policy, we will support the 0.4.0.x series for nine
7736 months, or until three months after the release of a stable 0.4.1.x:
7737 whichever is longer. If you need longer-term support, please stick
7738 with 0.3.5.x, which will we plan to support until Feb 2022.
7740 Below are the changes since 0.4.0.4-rc. For a complete list of changes
7741 since 0.3.5.7, see the ReleaseNotes file.
7743 o Minor features (continuous integration):
7744 - In Travis, tell timelimit to use stem's backtrace signals, and
7745 launch python directly from timelimit, so python receives the
7746 signals from timelimit, rather than make. Closes ticket 30117.
7748 o Minor features (diagnostic):
7749 - Add more diagnostic log messages in an attempt to solve the issue
7750 of NUL bytes appearing in a microdescriptor cache. Related to
7753 o Minor features (testing):
7754 - Use the approx_time() function when setting the "Expires" header
7755 in directory replies, to make them more testable. Needed for
7758 o Minor bugfixes (rust):
7759 - Abort on panic in all build profiles, instead of potentially
7760 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
7762 o Minor bugfixes (shellcheck):
7763 - Look for scripts in their correct locations during "make
7764 shellcheck". Previously we had looked in the wrong place during
7765 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
7767 o Minor bugfixes (testing):
7768 - Check the time in the "Expires" header using approx_time(). Fixes
7769 bug 30001; bugfix on 0.4.0.4-rc.
7771 o Minor bugfixes (UI):
7772 - Lower log level of unlink() errors during bootstrap. Fixes bug
7773 29930; bugfix on 0.4.0.1-alpha.
7776 Changes in version 0.4.0.4-rc - 2019-04-11
7777 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
7778 several bugs from earlier versions, including some that had affected
7779 stability, and one that prevented relays from working with NSS.
7781 o Major bugfixes (NSS, relay):
7782 - When running with NSS, disable TLS 1.2 ciphersuites that use
7783 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
7784 these ciphersuites don't work -- which caused relays to fail to
7785 handshake with one another when these ciphersuites were enabled.
7786 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
7788 o Minor features (bandwidth authority):
7789 - Make bandwidth authorities ignore relays that are reported in the
7790 bandwidth file with the flag "vote=0". This change allows us to
7791 report unmeasured relays for diagnostic reasons without including
7792 their bandwidth in the bandwidth authorities' vote. Closes
7794 - When a directory authority is using a bandwidth file to obtain the
7795 bandwidth values that will be included in the next vote, serve
7796 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
7799 o Minor features (circuit padding):
7800 - Stop warning about undefined behavior in the probability
7801 distribution tests. Float division by zero may technically be
7802 undefined behavior in C, but it's well defined in IEEE 754.
7803 Partial backport of 29298. Closes ticket 29527; bugfix
7806 o Minor features (continuous integration):
7807 - On Travis Rust builds, cleanup Rust registry and refrain from
7808 caching the "target/" directory to speed up builds. Resolves
7811 o Minor features (dormant mode):
7812 - Add a DormantCanceledByStartup option to tell Tor that it should
7813 treat a startup event as cancelling any previous dormant state.
7814 Integrators should use this option with caution: it should only be
7815 used if Tor is being started because of something that the user
7816 did, and not if Tor is being automatically started in the
7817 background. Closes ticket 29357.
7819 o Minor features (geoip):
7820 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
7821 Country database. Closes ticket 29992.
7823 o Minor features (NSS, diagnostic):
7824 - Try to log an error from NSS (if there is any) and a more useful
7825 description of our situation if we are using NSS and a call to
7826 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
7828 o Minor bugfixes (security):
7829 - Fix a potential double free bug when reading huge bandwidth files.
7830 The issue is not exploitable in the current Tor network because
7831 the vulnerable code is only reached when directory authorities
7832 read bandwidth files, but bandwidth files come from a trusted
7833 source (usually the authorities themselves). Furthermore, the
7834 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
7835 which are not used by any of the current authorities. Fixes bug
7836 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
7838 - Verify in more places that we are not about to create a buffer
7839 with more than INT_MAX bytes, to avoid possible OOB access in the
7840 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
7841 fixed by Tobias Stoeckmann.
7843 o Minor bugfix (continuous integration):
7844 - Reset coverage state on disk after Travis CI has finished. This
7845 should prevent future coverage merge errors from causing the test
7846 suite for the "process" subsystem to fail. The process subsystem
7847 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
7849 - Terminate test-stem if it takes more than 9.5 minutes to run.
7850 (Travis terminates the job after 10 minutes of no output.)
7851 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
7853 o Minor bugfixes (bootstrap reporting):
7854 - During bootstrap reporting, correctly distinguish pluggable
7855 transports from plain proxies. Fixes bug 28925; bugfix
7858 o Minor bugfixes (C correctness):
7859 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
7860 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
7863 o Minor bugfixes (circuitpadding testing):
7864 - Minor tweaks to avoid rare test failures related to timers and
7865 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
7867 o Minor bugfixes (directory authorities):
7868 - Actually include the bandwidth-file-digest line in directory
7869 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
7871 o Minor bugfixes (logging):
7872 - On Windows, when errors cause us to reload a consensus from disk,
7873 tell the user that we are retrying at log level "notice".
7874 Previously we only logged this information at "info", which was
7875 confusing because the errors themselves were logged at "warning".
7876 Improves previous fix for 28614. Fixes bug 30004; bugfix
7879 o Minor bugfixes (pluggable transports):
7880 - Restore old behavior when it comes to discovering the path of a
7881 given Pluggable Transport executable file. A change in
7882 0.4.0.1-alpha had broken this behavior on paths containing a
7883 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
7885 o Minor bugfixes (testing):
7886 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
7887 recent test-network.sh to use new chutney features in CI. Fixes
7888 bug 29703; bugfix on 0.2.9.1-alpha.
7889 - Fix a test failure on Windows caused by an unexpected "BUG"
7890 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
7893 o Minor bugfixes (TLS protocol):
7894 - When classifying a client's selection of TLS ciphers, if the
7895 client ciphers are not yet available, do not cache the result.
7896 Previously, we had cached the unavailability of the cipher list
7897 and never looked again, which in turn led us to assume that the
7898 client only supported the ancient V1 link protocol. This, in turn,
7899 was causing Stem integration tests to stall in some cases. Fixes
7900 bug 30021; bugfix on 0.2.4.8-alpha.
7902 o Code simplification and refactoring:
7903 - Introduce a connection_dir_buf_add() helper function that detects
7904 whether compression is in use, and adds a string accordingly.
7905 Resolves issue 28816.
7906 - Refactor handle_get_next_bandwidth() to use
7907 connection_dir_buf_add(). Implements ticket 29897.
7910 - Clarify that Tor performs stream isolation among *Port listeners
7911 by default. Resolves issue 29121.
7914 Changes in version 0.4.0.3-alpha - 2019-03-22
7915 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
7916 bugs from earlier versions.
7918 o Minor features (address selection):
7919 - Treat the subnet 100.64.0.0/10 as public for some purposes;
7920 private for others. This subnet is the RFC 6598 (Carrier Grade
7921 NAT) IP range, and is deployed by many ISPs as an alternative to
7922 RFC 1918 that does not break existing internal networks. Tor now
7923 blocks SOCKS and control ports on these addresses and warns users
7924 if client ports or ExtORPorts are listening on a RFC 6598 address.
7925 Closes ticket 28525. Patch by Neel Chauhan.
7927 o Minor features (geoip):
7928 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
7929 Country database. Closes ticket 29666.
7931 o Minor bugfixes (circuitpadding):
7932 - Inspect the circuit-level cell queue before sending padding, to
7933 avoid sending padding when too much data is queued. Fixes bug
7934 29204; bugfix on 0.4.0.1-alpha.
7936 o Minor bugfixes (logging):
7937 - Correct a misleading error message when IPv4Only or IPv6Only is
7938 used but the resolved address can not be interpreted as an address
7939 of the specified IP version. Fixes bug 13221; bugfix on
7940 0.2.3.9-alpha. Patch from Kris Katterjohn.
7941 - Log the correct port number for listening sockets when "auto" is
7942 used to let Tor pick the port number. Previously, port 0 was
7943 logged instead of the actual port number. Fixes bug 29144; bugfix
7944 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7945 - Stop logging a BUG() warning when Tor is waiting for exit
7946 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
7948 o Minor bugfixes (memory management):
7949 - Refactor the shared random state's memory management so that it
7950 actually takes ownership of the shared random value pointers.
7951 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
7953 o Minor bugfixes (memory management, testing):
7954 - Stop leaking parts of the shared random state in the shared-random
7955 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
7957 o Minor bugfixes (pluggable transports):
7958 - Fix an assertion failure crash bug when a pluggable transport is
7959 terminated during the bootstrap phase. Fixes bug 29562; bugfix
7962 o Minor bugfixes (Rust, protover):
7963 - Add a missing "Padding" value to the Rust implementation of
7964 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
7966 o Minor bugfixes (single onion services):
7967 - Allow connections to single onion services to remain idle without
7968 being disconnected. Previously, relays acting as rendezvous points
7969 for single onion services were mistakenly closing idle rendezvous
7970 circuits after 60 seconds, thinking that they were unused
7971 directory-fetching circuits that had served their purpose. Fixes
7972 bug 29665; bugfix on 0.2.1.26.
7974 o Minor bugfixes (stats):
7975 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
7976 relay and bridge extra-info documents. Fixes bug 29017; bugfix
7979 o Minor bugfixes (testing):
7980 - Downgrade some LOG_ERR messages in the address/* tests to
7981 warnings. The LOG_ERR messages were occurring when we had no
7982 configured network. We were failing the unit tests, because we
7983 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
7984 29530; bugfix on 0.3.5.8.
7985 - Fix our gcov wrapper script to look for object files at the
7986 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
7987 - Decrease the false positive rate of stochastic probability
7988 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
7990 o Minor bugfixes (Windows, CI):
7991 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
7992 Windows Server 2012 R2 job. The remaining 2 jobs still provide
7993 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
7994 fast_finish, so failed jobs terminate the build immediately. Fixes
7995 bug 29601; bugfix on 0.3.5.4-alpha.
7998 Changes in version 0.3.5.8 - 2019-02-21
7999 Tor 0.3.5.8 backports several fixes from later releases, including fixes
8000 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
8003 It also includes a fix for a medium-severity security bug affecting Tor
8004 0.3.2.1-alpha and later. All Tor instances running an affected release
8005 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8007 o Major bugfixes (cell scheduler, KIST, security):
8008 - Make KIST consider the outbuf length when computing what it can
8009 put in the outbuf. Previously, KIST acted as though the outbuf
8010 were empty, which could lead to the outbuf becoming too full. It
8011 is possible that an attacker could exploit this bug to cause a Tor
8012 client or relay to run out of memory and crash. Fixes bug 29168;
8013 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8014 TROVE-2019-001 and CVE-2019-8955.
8016 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
8017 - Gracefully handle empty username/password fields in SOCKS5
8018 username/password auth message and allow SOCKS5 handshake to
8019 continue. Previously, we had rejected these handshakes, breaking
8020 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
8022 o Minor features (compilation, backport from 0.4.0.2-alpha):
8023 - Compile correctly when OpenSSL is built with engine support
8024 disabled, or with deprecated APIs disabled. Closes ticket 29026.
8025 Patches from "Mangix".
8027 o Minor features (geoip):
8028 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8029 Country database. Closes ticket 29478.
8031 o Minor features (testing, backport from 0.4.0.2-alpha):
8032 - Treat all unexpected ERR and BUG messages as test failures. Closes
8035 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
8036 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8037 connection waiting for a descriptor that we actually have in the
8038 cache. It turns out that this can actually happen, though it is
8039 rare. Now, tor will recover and retry the descriptor. Fixes bug
8040 28669; bugfix on 0.3.2.4-alpha.
8042 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
8043 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
8044 IPv6 socket was bound using an address family of AF_INET instead
8045 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
8048 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
8049 - Update Cargo.lock file to match the version made by the latest
8050 version of Rust, so that "make distcheck" will pass again. Fixes
8051 bug 29244; bugfix on 0.3.3.4-alpha.
8053 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
8054 - Select guards even if the consensus has expired, as long as the
8055 consensus is still reasonably live. Fixes bug 24661; bugfix
8058 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
8059 - Compile correctly on OpenBSD; previously, we were missing some
8060 headers required in order to detect it properly. Fixes bug 28938;
8061 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8063 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
8064 - Describe the contents of the v3 onion service client authorization
8065 files correctly: They hold public keys, not private keys. Fixes
8066 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
8068 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
8069 - Rework rep_hist_log_link_protocol_counts() to iterate through all
8070 link protocol versions when logging incoming/outgoing connection
8071 counts. Tor no longer skips version 5, and we won't have to
8072 remember to update this function when new link protocol version is
8073 developed. Fixes bug 28920; bugfix on 0.2.6.10.
8075 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
8076 - Log more information at "warning" level when unable to read a
8077 private key; log more information at "info" level when unable to
8078 read a public key. We had warnings here before, but they were lost
8079 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
8081 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
8082 - The amount of total available physical memory is now determined
8083 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
8084 when it is defined and a 64-bit variant is not available. Fixes
8085 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
8087 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
8088 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
8089 than one private key for a hidden service. Fixes bug 29040; bugfix
8091 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
8092 "debug" level. Tor used to log it as a warning, which caused very
8093 long log lines to appear for some users. Fixes bug 29135; bugfix
8095 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8096 as a warning. Instead, log it as a protocol warning, because there
8097 is nothing that relay operators can do to fix it. Fixes bug 29029;
8098 bugfix on 0.2.5.7-rc.
8100 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
8101 - Mark outdated dirservers when Tor only has a reasonably live
8102 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
8104 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
8105 - Detect and suppress "bug" warnings from the util/time test on
8106 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
8107 - Do not log an error-level message if we fail to find an IPv6
8108 network interface from the unit tests. Fixes bug 29160; bugfix
8111 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
8112 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8113 Some users took this phrasing to mean that the mentioned guard was
8114 under their control or responsibility, which it is not. Fixes bug
8115 28895; bugfix on Tor 0.3.0.1-alpha.
8118 Changes in version 0.3.4.11 - 2019-02-21
8119 Tor 0.3.4.11 is the third stable release in its series. It includes
8120 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
8121 later. All Tor instances running an affected release should upgrade to
8122 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8124 o Major bugfixes (cell scheduler, KIST, security):
8125 - Make KIST consider the outbuf length when computing what it can
8126 put in the outbuf. Previously, KIST acted as though the outbuf
8127 were empty, which could lead to the outbuf becoming too full. It
8128 is possible that an attacker could exploit this bug to cause a Tor
8129 client or relay to run out of memory and crash. Fixes bug 29168;
8130 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8131 TROVE-2019-001 and CVE-2019-8955.
8133 o Minor features (geoip):
8134 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8135 Country database. Closes ticket 29478.
8137 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
8138 - Update Cargo.lock file to match the version made by the latest
8139 version of Rust, so that "make distcheck" will pass again. Fixes
8140 bug 29244; bugfix on 0.3.3.4-alpha.
8142 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
8143 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8144 as a warning. Instead, log it as a protocol warning, because there
8145 is nothing that relay operators can do to fix it. Fixes bug 29029;
8146 bugfix on 0.2.5.7-rc.
8149 Changes in version 0.3.3.12 - 2019-02-21
8150 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
8151 0.3.2.1-alpha and later. All Tor instances running an affected release
8152 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8154 This release marks the end of support for the Tor 0.3.3.x series. We
8155 recommend that users switch to either the Tor 0.3.4 series (supported
8156 until at least 10 June 2019), or the Tor 0.3.5 series, which will
8157 receive long-term support until at least 1 Feb 2022.
8159 o Major bugfixes (cell scheduler, KIST, security):
8160 - Make KIST consider the outbuf length when computing what it can
8161 put in the outbuf. Previously, KIST acted as though the outbuf
8162 were empty, which could lead to the outbuf becoming too full. It
8163 is possible that an attacker could exploit this bug to cause a Tor
8164 client or relay to run out of memory and crash. Fixes bug 29168;
8165 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8166 TROVE-2019-001 and CVE-2019-8955.
8168 o Minor features (geoip):
8169 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8170 Country database. Closes ticket 29478.
8172 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
8173 - Update Cargo.lock file to match the version made by the latest
8174 version of Rust, so that "make distcheck" will pass again. Fixes
8175 bug 29244; bugfix on 0.3.3.4-alpha.
8177 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
8178 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8179 as a warning. Instead, log it as a protocol warning, because there
8180 is nothing that relay operators can do to fix it. Fixes bug 29029;
8181 bugfix on 0.2.5.7-rc.
8184 Changes in version 0.4.0.2-alpha - 2019-02-21
8185 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
8186 bugs from earlier versions, including several that had broken
8187 backward compatibility.
8189 It also includes a fix for a medium-severity security bug affecting Tor
8190 0.3.2.1-alpha and later. All Tor instances running an affected release
8191 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
8193 o Major bugfixes (cell scheduler, KIST, security):
8194 - Make KIST consider the outbuf length when computing what it can
8195 put in the outbuf. Previously, KIST acted as though the outbuf
8196 were empty, which could lead to the outbuf becoming too full. It
8197 is possible that an attacker could exploit this bug to cause a Tor
8198 client or relay to run out of memory and crash. Fixes bug 29168;
8199 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
8200 TROVE-2019-001 and CVE-2019-8955.
8202 o Major bugfixes (networking):
8203 - Gracefully handle empty username/password fields in SOCKS5
8204 username/password auth messsage and allow SOCKS5 handshake to
8205 continue. Previously, we had rejected these handshakes, breaking
8206 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
8208 o Major bugfixes (windows, startup):
8209 - When reading a consensus file from disk, detect whether it was
8210 written in text mode, and re-read it in text mode if so. Always
8211 write consensus files in binary mode so that we can map them into
8212 memory later. Previously, we had written in text mode, which
8213 confused us when we tried to map the file on windows. Fixes bug
8214 28614; bugfix on 0.4.0.1-alpha.
8216 o Minor features (compilation):
8217 - Compile correctly when OpenSSL is built with engine support
8218 disabled, or with deprecated APIs disabled. Closes ticket 29026.
8219 Patches from "Mangix".
8221 o Minor features (developer tooling):
8222 - Check that bugfix versions in changes files look like Tor versions
8223 from the versions spec. Warn when bugfixes claim to be on a future
8224 release. Closes ticket 27761.
8225 - Provide a git pre-commit hook that disallows committing if we have
8226 any failures in our code and changelog formatting checks. It is
8227 now available in scripts/maint/pre-commit.git-hook. Implements
8230 o Minor features (directory authority):
8231 - When a directory authority is using a bandwidth file to obtain
8232 bandwidth values, include the digest of that file in the vote.
8233 Closes ticket 26698.
8235 o Minor features (geoip):
8236 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
8237 Country database. Closes ticket 29478.
8239 o Minor features (testing):
8240 - Treat all unexpected ERR and BUG messages as test failures. Closes
8243 o Minor bugfixes (build, compatibility, rust):
8244 - Update Cargo.lock file to match the version made by the latest
8245 version of Rust, so that "make distcheck" will pass again. Fixes
8246 bug 29244; bugfix on 0.3.3.4-alpha.
8248 o Minor bugfixes (compilation):
8249 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
8250 29169; bugfix on 0.4.0.1-alpha.
8251 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
8252 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
8254 o Minor bugfixes (documentation):
8255 - Describe the contents of the v3 onion service client authorization
8256 files correctly: They hold public keys, not private keys. Fixes
8257 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
8259 o Minor bugfixes (linux seccomp sandbox):
8260 - Fix startup crash when experimental sandbox support is enabled.
8261 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
8263 o Minor bugfixes (logging):
8264 - Avoid logging that we are relaxing a circuit timeout when that
8265 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
8266 - Log more information at "warning" level when unable to read a
8267 private key; log more information at "info" level when unable to
8268 read a public key. We had warnings here before, but they were lost
8269 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
8271 o Minor bugfixes (misc):
8272 - The amount of total available physical memory is now determined
8273 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
8274 when it is defined and a 64-bit variant is not available. Fixes
8275 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
8277 o Minor bugfixes (onion services):
8278 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
8279 than one private key for a hidden service. Fixes bug 29040; bugfix
8281 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
8282 "debug" level. Tor used to log it as a warning, which caused very
8283 long log lines to appear for some users. Fixes bug 29135; bugfix
8285 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
8286 as a warning. Instead, log it as a protocol warning, because there
8287 is nothing that relay operators can do to fix it. Fixes bug 29029;
8288 bugfix on 0.2.5.7-rc.
8290 o Minor bugfixes (scheduler):
8291 - When re-adding channels to the pending list, check the correct
8292 channel's sched_heap_idx. This issue has had no effect in mainline
8293 Tor, but could have led to bugs down the road in improved versions
8294 of our circuit scheduling code. Fixes bug 29508; bugfix
8297 o Minor bugfixes (tests):
8298 - Fix intermittent failures on an adaptive padding test. Fixes one
8299 case of bug 29122; bugfix on 0.4.0.1-alpha.
8300 - Disable an unstable circuit-padding test that was failing
8301 intermittently because of an ill-defined small histogram. Such
8302 histograms will be allowed again after 29298 is implemented. Fixes
8303 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
8304 - Detect and suppress "bug" warnings from the util/time test on
8305 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
8306 - Do not log an error-level message if we fail to find an IPv6
8307 network interface from the unit tests. Fixes bug 29160; bugfix
8311 - In the manpage entry describing MapAddress torrc setting, use
8312 example IP addresses from ranges specified for use in documentation
8313 by RFC 5737. Resolves issue 28623.
8316 - Remove the old check-tor script. Resolves issue 29072.
8319 Changes in version 0.4.0.1-alpha - 2019-01-18
8320 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
8321 introduces improved features for power and bandwidth conservation,
8322 more accurate reporting of bootstrap progress for user interfaces, and
8323 an experimental backend for an exciting new adaptive padding feature.
8324 There is also the usual assortment of bugfixes and minor features, all
8327 o Major features (battery management, client, dormant mode):
8328 - When Tor is running as a client, and it is unused for a long time,
8329 it can now enter a "dormant" state. When Tor is dormant, it avoids
8330 network and CPU activity until it is reawoken either by a user
8331 request or by a controller command. For more information, see the
8332 configuration options starting with "Dormant". Implements tickets
8334 - The client's memory of whether it is "dormant", and how long it
8335 has spent idle, persists across invocations. Implements
8337 - There is a DormantOnFirstStartup option that integrators can use
8338 if they expect that in many cases, Tor will be installed but
8341 o Major features (bootstrap reporting):
8342 - When reporting bootstrap progress, report the first connection
8343 uniformly, regardless of whether it's a connection for building
8344 application circuits. This allows finer-grained reporting of early
8345 progress than previously possible, with the improvements of ticket
8346 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
8347 - When reporting bootstrap progress, treat connecting to a proxy or
8348 pluggable transport as separate from having successfully used that
8349 proxy or pluggable transport to connect to a relay. Closes tickets
8352 o Major features (circuit padding):
8353 - Implement preliminary support for the circuit padding portion of
8354 Proposal 254. The implementation supports Adaptive Padding (aka
8355 WTF-PAD) state machines for use between experimental clients and
8356 relays. Support is also provided for APE-style state machines that
8357 use probability distributions instead of histograms to specify
8358 inter-packet delay. At the moment, Tor does not provide any
8359 padding state machines that are used in normal operation: for now,
8360 this feature exists solely for experimentation. Closes
8363 o Major features (refactoring):
8364 - Tor now uses an explicit list of its own subsystems when
8365 initializing and shutting down. Previously, these systems were
8366 managed implicitly in various places throughout the codebase.
8367 (There may still be some subsystems using the old system.) Closes
8370 o Minor features (bootstrap reporting):
8371 - When reporting bootstrap progress, stop distinguishing between
8372 situations where only internal paths are available and situations
8373 where external paths are available. Previously, Tor would often
8374 erroneously report that it had only internal paths. Closes
8377 o Minor features (continuous integration):
8378 - Log Python version during each Travis CI job. Resolves
8381 o Minor features (controller):
8382 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
8383 Implements ticket 28843.
8385 o Minor features (developer tooling):
8386 - Provide a git hook script to prevent "fixup!" and "squash!"
8387 commits from ending up in the master branch, as scripts/main/pre-
8388 push.git-hook. Closes ticket 27993.
8390 o Minor features (directory authority):
8391 - Directory authorities support a new consensus algorithm, under
8392 which the family lines in microdescriptors are encoded in a
8393 canonical form. This change makes family lines more compressible
8394 in transit, and on the client. Closes ticket 28266; implements
8397 o Minor features (directory authority, relay):
8398 - Authorities now vote on a "StaleDesc" flag to indicate that a
8399 relay's descriptor is so old that the relay should upload again
8400 soon. Relays treat this flag as a signal to upload a new
8401 descriptor. This flag will eventually let us remove the
8402 'published' date from routerstatus entries, and make our consensus
8403 diffs much smaller. Closes ticket 26770; implements proposal 293.
8405 o Minor features (fallback directory mirrors):
8406 - Update the fallback whitelist based on operator opt-ins and opt-
8407 outs. Closes ticket 24805, patch by Phoul.
8409 o Minor features (FreeBSD):
8410 - On FreeBSD-based systems, warn relay operators if the
8411 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
8412 Closes ticket 28518.
8414 o Minor features (HTTP standards compliance):
8415 - Stop sending the header "Content-type: application/octet-stream"
8416 along with transparently compressed documents: this confused
8417 browsers. Closes ticket 28100.
8419 o Minor features (IPv6):
8420 - We add an option ClientAutoIPv6ORPort, to make clients randomly
8421 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
8422 every time a node is loaded from a new consensus or bridge config.
8423 We expect that this option will enable clients to bootstrap more
8424 quickly without having to determine whether they support IPv4,
8425 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
8426 - When using addrs_in_same_network_family(), avoid choosing circuit
8427 paths that pass through the same IPv6 subnet more than once.
8428 Previously, we only checked IPv4 subnets. Closes ticket 24393.
8429 Patch by Neel Chauhan.
8431 o Minor features (log messages):
8432 - Improve log message in v3 onion services that could print out
8433 negative revision counters. Closes ticket 27707. Patch
8436 o Minor features (memory usage):
8437 - Save memory by storing microdescriptor family lists with a more
8438 compact representation. Closes ticket 27359.
8439 - Tor clients now use mmap() to read consensus files from disk, so
8440 that they no longer need keep the full text of a consensus in
8441 memory when parsing it or applying a diff. Closes ticket 27244.
8443 o Minor features (parsing):
8444 - Directory authorities now validate that router descriptors and
8445 ExtraInfo documents are in a valid subset of UTF-8, and reject
8446 them if they are not. Closes ticket 27367.
8448 o Minor features (performance):
8449 - Cache the results of summarize_protocol_flags(), so that we don't
8450 have to parse the same protocol-versions string over and over.
8451 This should save us a huge number of malloc calls on startup, and
8452 may reduce memory fragmentation with some allocators. Closes
8454 - Remove a needless memset() call from get_token_arguments, thereby
8455 speeding up the tokenization of directory objects by about 20%.
8456 Closes ticket 28852.
8457 - Replace parse_short_policy() with a faster implementation, to
8458 improve microdescriptor parsing time. Closes ticket 28853.
8459 - Speed up directory parsing a little by avoiding use of the non-
8460 inlined strcmp_len() function. Closes ticket 28856.
8461 - Speed up microdescriptor parsing by about 30%, to help improve
8462 startup time. Closes ticket 28839.
8464 o Minor features (pluggable transports):
8465 - Add support for emitting STATUS updates to Tor's control port from
8466 a pluggable transport process. Closes ticket 28846.
8467 - Add support for logging to Tor's logging subsystem from a
8468 pluggable transport process. Closes ticket 28180.
8470 o Minor features (process management):
8471 - Add a new process API for handling child processes. This new API
8472 allows Tor to have bi-directional communication with child
8473 processes on both Unix and Windows. Closes ticket 28179.
8474 - Use the subsystem manager to initialize and shut down the process
8475 module. Closes ticket 28847.
8477 o Minor features (relay):
8478 - When listing relay families, list them in canonical form including
8479 the relay's own identity, and try to give a more useful set of
8480 warnings. Part of ticket 28266 and proposal 298.
8482 o Minor features (required protocols):
8483 - Before exiting because of a missing required protocol, Tor will
8484 now check the publication time of the consensus, and not exit
8485 unless the consensus is newer than the Tor program's own release
8486 date. Previously, Tor would not check the consensus publication
8487 time, and so might exit because of a missing protocol that might
8488 no longer be required in a current consensus. Implements proposal
8489 297; closes ticket 27735.
8491 o Minor features (testing):
8492 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
8493 networks. Closes ticket 28840. Patch by Rob Jansen.
8495 o Minor bugfixes (client, clock skew):
8496 - Bootstrap successfully even when Tor's clock is behind the clocks
8497 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
8498 - Select guards even if the consensus has expired, as long as the
8499 consensus is still reasonably live. Fixes bug 24661; bugfix
8502 o Minor bugfixes (compilation):
8503 - Compile correctly on OpenBSD; previously, we were missing some
8504 headers required in order to detect it properly. Fixes bug 28938;
8505 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8507 o Minor bugfixes (directory clients):
8508 - Mark outdated dirservers when Tor only has a reasonably live
8509 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
8511 o Minor bugfixes (directory mirrors):
8512 - Even when a directory mirror's clock is behind the clocks on the
8513 authorities, we now allow the mirror to serve "future"
8514 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
8516 o Minor bugfixes (DNS):
8517 - Gracefully handle an empty or absent resolve.conf file by falling
8518 back to using "localhost" as a DNS server (and hoping it works).
8519 Previously, we would just stop running as an exit. Fixes bug
8520 21900; bugfix on 0.2.1.10-alpha.
8522 o Minor bugfixes (guards):
8523 - In count_acceptable_nodes(), the minimum number is now one bridge
8524 or guard node, and two non-guard nodes for a circuit. Previously,
8525 we had added up the sum of all nodes with a descriptor, but that
8526 could cause us to build failing circuits when we had either too
8527 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
8528 0.2.3.1-alpha. Patch by Neel Chauhan.
8530 o Minor bugfixes (IPv6):
8531 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
8532 IPv6 socket was bound using an address family of AF_INET instead
8533 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
8536 o Minor bugfixes (logging):
8537 - Rework rep_hist_log_link_protocol_counts() to iterate through all
8538 link protocol versions when logging incoming/outgoing connection
8539 counts. Tor no longer skips version 5, and we won't have to
8540 remember to update this function when new link protocol version is
8541 developed. Fixes bug 28920; bugfix on 0.2.6.10.
8543 o Minor bugfixes (networking):
8544 - Introduce additional checks into tor_addr_parse() to reject
8545 certain incorrect inputs that previously were not detected. Fixes
8546 bug 23082; bugfix on 0.2.0.10-alpha.
8548 o Minor bugfixes (onion service v3, client):
8549 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8550 connection waiting for a descriptor that we actually have in the
8551 cache. It turns out that this can actually happen, though it is
8552 rare. Now, tor will recover and retry the descriptor. Fixes bug
8553 28669; bugfix on 0.3.2.4-alpha.
8555 o Minor bugfixes (periodic events):
8556 - Refrain from calling routerlist_remove_old_routers() from
8557 check_descriptor_callback(). Instead, create a new hourly periodic
8558 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
8560 o Minor bugfixes (pluggable transports):
8561 - Make sure that data is continously read from standard output and
8562 standard error pipes of a pluggable transport child-process, to
8563 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
8564 bugfix on 0.2.3.6-alpha.
8566 o Minor bugfixes (unit tests):
8567 - Instead of relying on hs_free_all() to clean up all onion service
8568 objects in test_build_descriptors(), we now deallocate them one by
8569 one. This lets Coverity know that we are not leaking memory there
8570 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
8572 o Minor bugfixes (usability):
8573 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8574 Some users took this phrasing to mean that the mentioned guard was
8575 under their control or responsibility, which it is not. Fixes bug
8576 28895; bugfix on Tor 0.3.0.1-alpha.
8578 o Code simplification and refactoring:
8579 - Reimplement NETINFO cell parsing and generation to rely on
8580 trunnel-generated wire format handling code. Closes ticket 27325.
8581 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
8583 - Rework SOCKS wire format handling to rely on trunnel-generated
8584 parsing/generation code. Resolves ticket 27620.
8585 - Split out bootstrap progress reporting from control.c into a
8586 separate file. Part of ticket 27402.
8587 - The .may_include files that we use to describe our directory-by-
8588 directory dependency structure now describe a noncircular
8589 dependency graph over the directories that they cover. Our
8590 checkIncludes.py tool now enforces this noncircularity. Closes
8594 - Mention that you cannot add a new onion service if Tor is already
8595 running with Sandbox enabled. Closes ticket 28560.
8596 - Improve ControlPort documentation. Mention that it accepts
8597 address:port pairs, and can be used multiple times. Closes
8599 - Document the exact output of "tor --version". Closes ticket 28889.
8602 - Stop responding to the 'GETINFO status/version/num-concurring' and
8603 'GETINFO status/version/num-versioning' control port commands, as
8604 those were deprecated back in 0.2.0.30. Also stop listing them in
8605 output of 'GETINFO info/names'. Resolves ticket 28757.
8606 - The scripts used to generate and maintain the list of fallback
8607 directories have been extracted into a new "fallback-scripts"
8608 repository. Closes ticket 27914.
8611 - Run shellcheck for scripts in the in scripts/ directory. Closes
8613 - Add unit tests for tokenize_string() and get_next_token()
8614 functions. Resolves ticket 27625.
8616 o Code simplification and refactoring (onion service v3):
8617 - Consolidate the authorized client descriptor cookie computation
8618 code from client and service into one function. Closes
8621 o Code simplification and refactoring (shell scripts):
8622 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
8624 - Fix issues that shellcheck found in chutney-git-bisect.sh.
8625 Resolves ticket 28006.
8626 - Fix issues that shellcheck found in updateRustDependencies.sh.
8627 Resolves ticket 28012.
8628 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
8629 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
8630 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
8631 - Fix shellcheck warnings in scripts/test/coverage. Resolves
8635 Changes in version 0.3.3.11 - 2019-01-07
8636 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
8637 numerous fixes, including an important fix for anyone using OpenSSL
8638 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
8639 to this version, or to a later series.
8641 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
8642 We anticipate that this will be the last release of Tor 0.3.3, unless
8643 some major bug is before then. Some time between now and then, users
8644 should switch to either the Tor 0.3.4 series (supported until at least
8645 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
8646 support until at least 1 Feb 2022.
8648 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8649 - Fix our usage of named groups when running as a TLS 1.3 client in
8650 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8651 running as a relay, which caused clients to fail to negotiate TLS
8652 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8655 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8656 - Fix a use-after-free error that could be caused by passing Tor an
8657 impossible set of options that would fail during options_act().
8658 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8660 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8661 - Only run one online rust build in Travis, to reduce network
8662 errors. Skip offline rust builds on Travis for Linux gcc, because
8663 they're redundant. Implements ticket 27252.
8664 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8665 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8666 Linux with default settings, because all the non-default builds
8667 use gcc on Linux. Implements ticket 27252.
8669 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8670 - Use the Travis Homebrew addon to install packages on macOS during
8671 Travis CI. The package list is the same, but the Homebrew addon
8672 does not do a `brew update` by default. Implements ticket 27738.
8674 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8675 - Replace the 150 fallbacks originally introduced in Tor
8676 0.3.3.1-alpha in January 2018 (of which ~115 were still
8677 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8678 removed) generated in December 2018. Closes ticket 24803.
8680 o Minor features (geoip):
8681 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8682 Country database. Closes ticket 29012.
8684 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8685 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8686 key export function from handling long labels. When this bug is
8687 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8688 version of OpenSSL without this bug when it becomes available.
8689 Closes ticket 28973.
8691 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8692 - Update relay descriptor on bandwidth changes only when the uptime
8693 is smaller than 24h, in order to reduce the efficiency of guard
8694 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8696 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
8697 - Avoid undefined behavior in an end-of-string check when parsing
8698 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8701 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8702 - Rewrite our assertion macros so that they no longer suppress the
8703 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8705 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8706 - Initialize a variable unconditionally in aes_new_cipher(), since
8707 some compilers cannot tell that we always initialize it before
8708 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8710 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
8711 - Log additional info when we get a relay that shares an ed25519 ID
8712 with a different relay, instead making a BUG() warning. Fixes bug
8713 27800; bugfix on 0.3.2.1-alpha.
8715 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8716 - When a user requests a group-readable DataDirectory, give it to
8717 them. Previously, when the DataDirectory and the CacheDirectory
8718 were the same, the default setting (0) for
8719 CacheDirectoryGroupReadable would override the setting for
8720 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8723 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8724 - When the onion service directory can't be created or has the wrong
8725 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8728 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8729 - Close all SOCKS request (for the same .onion) if the newly fetched
8730 descriptor is unusable. Before that, we would close only the first
8731 one leaving the other hanging and let to time out by themselves.
8732 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8734 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8735 - Don't warn so loudly when Tor is unable to decode an onion
8736 descriptor. This can now happen as a normal use case if a client
8737 gets a descriptor with client authorization but the client is not
8738 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8740 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8741 - When deleting an ephemeral onion service (DEL_ONION), do not close
8742 any rendezvous circuits in order to let the existing client
8743 connections finish by themselves or closed by the application. The
8744 HS v2 is doing that already so now we have the same behavior for
8745 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8747 o Minor bugfixes (HTTP tunnel):
8748 - Fix a bug warning when closing an HTTP tunnel connection due to
8749 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
8752 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8753 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8754 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8756 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8757 - Ensure circuitmux queues are empty before scheduling or sending
8758 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8760 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8761 - Reject protocol names containing bytes other than alphanumeric
8762 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8765 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8766 - Compute protover votes correctly in the rust version of the
8767 protover code. Previously, the protover rewrite in 24031 allowed
8768 repeated votes from the same voter for the same protocol version
8769 to be counted multiple times in protover_compute_vote(). Fixes bug
8770 27649; bugfix on 0.3.3.5-rc.
8771 - Reject protover names that contain invalid characters. Fixes bug
8772 27687; bugfix on 0.3.3.1-alpha.
8774 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8775 - protover_all_supported() would attempt to allocate up to 16GB on
8776 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8777 bugfix on 0.3.3.5-rc.
8779 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
8780 - Fix a potential null dereference in protover_all_supported(). Add
8781 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8782 - Return a string that can be safely freed by C code, not one
8783 created by the rust allocator, in protover_all_supported(). Fixes
8784 bug 27740; bugfix on 0.3.3.1-alpha.
8785 - Fix an API mismatch in the rust implementation of
8786 protover_compute_vote(). This bug could have caused crashes on any
8787 directory authorities running Tor with Rust (which we do not yet
8788 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8790 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8791 - If a unit test running in a subprocess exits abnormally or with a
8792 nonzero status code, treat the test as having failed, even if the
8793 test reported success. Without this fix, memory leaks don't cause
8794 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8795 bugfix on 0.2.2.4-alpha.
8797 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
8798 - Treat backtrace test failures as expected on BSD-derived systems
8799 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8800 (FreeBSD failures have been treated as expected since 18204 in
8801 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8803 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8804 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8805 bugfix on 0.3.0.1-alpha.
8808 Changes in version 0.3.4.10 - 2019-01-07
8809 Tor 0.3.4.9 is the second stable release in its series; it backports
8810 numerous fixes, including an important fix for relays, and for anyone
8811 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
8814 As a reminder, the Tor 0.3.4 series will be supported until 10 June
8815 2019. Some time between now and then, users should switch to the Tor
8816 0.3.5 series, which will receive long-term support until at least 1
8819 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8820 - Fix our usage of named groups when running as a TLS 1.3 client in
8821 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8822 running as a relay, which caused clients to fail to negotiate TLS
8823 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8826 o Major bugfixes (relay, directory, backport from 0.3.5.7):
8827 - Always reactivate linked connections in the main loop so long as
8828 any linked connection has been active. Previously, connections
8829 serving directory information wouldn't get reactivated after the
8830 first chunk of data was sent (usually 32KB), which would prevent
8831 clients from bootstrapping. Fixes bug 28912; bugfix on
8832 0.3.4.1-alpha. Patch by "cypherpunks3".
8834 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
8835 - Always show the configure and test logs, and upload them as build
8836 artifacts, when building for Windows using Appveyor CI.
8839 o Minor features (controller, backport from 0.3.5.1-alpha):
8840 - For purposes of CIRC_BW-based dropped cell detection, track half-
8841 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8842 bias check cells to arrive without counting it as dropped until
8843 either the END arrives, or the windows are empty. Closes
8846 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8847 - Replace the 150 fallbacks originally introduced in Tor
8848 0.3.3.1-alpha in January 2018 (of which ~115 were still
8849 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8850 removed) generated in December 2018. Closes ticket 24803.
8852 o Minor features (geoip):
8853 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8854 Country database. Closes ticket 28395.
8856 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8857 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8858 key export function from handling long labels. When this bug is
8859 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8860 version of OpenSSL without this bug when it becomes available.
8861 Closes ticket 28973.
8863 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8864 - Initialize a variable unconditionally in aes_new_cipher(), since
8865 some compilers cannot tell that we always initialize it before
8866 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8868 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
8869 - Avoid a logging a BUG() stacktrace when closing connection held
8870 open because the write side is rate limited but not the read side.
8871 Now, the connection read side is simply shut down until Tor is
8872 able to flush the connection and close it. Fixes bug 27750; bugfix
8875 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
8876 - Manually configure the zstd compiler options, when building using
8877 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8878 not come with a pkg-config file. Fixes bug 28454; bugfix
8880 - Stop using an external OpenSSL install, and stop installing MSYS2
8881 packages, when building using mingw on Appveyor Windows CI. Fixes
8882 bug 28399; bugfix on 0.3.4.1-alpha.
8884 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
8885 - Explicitly specify the path to the OpenSSL library and do not
8886 download OpenSSL from Pacman, but instead use the library that is
8887 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8889 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8890 - When a user requests a group-readable DataDirectory, give it to
8891 them. Previously, when the DataDirectory and the CacheDirectory
8892 were the same, the default setting (0) for
8893 CacheDirectoryGroupReadable would override the setting for
8894 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8897 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8898 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8899 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8901 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8902 - Don't warn so loudly when Tor is unable to decode an onion
8903 descriptor. This can now happen as a normal use case if a client
8904 gets a descriptor with client authorization but the client is not
8905 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8907 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8908 - When deleting an ephemeral onion service (DEL_ONION), do not close
8909 any rendezvous circuits in order to let the existing client
8910 connections finish by themselves or closed by the application. The
8911 HS v2 is doing that already so now we have the same behavior for
8912 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8914 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8915 - Update relay descriptor on bandwidth changes only when the uptime
8916 is smaller than 24h, in order to reduce the efficiency of guard
8917 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8919 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8920 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8921 bugfix on 0.3.0.1-alpha.
8924 Changes in version 0.3.5.7 - 2019-01-07
8925 Tor 0.3.5.7 is the first stable release in its series; it includes
8926 compilation and portability fixes, and a fix for a severe problem
8927 affecting directory caches.
8929 The Tor 0.3.5 series includes several new features and performance
8930 improvements, including client authorization for v3 onion services,
8931 cleanups to bootstrap reporting, support for improved bandwidth-
8932 measurement tools, experimental support for NSS in place of OpenSSL,
8933 and much more. It also begins a full reorganization of Tor's code
8934 layout, for improved modularity and maintainability in the future.
8935 Finally, there is the usual set of performance improvements and
8936 bugfixes that we try to do in every release series.
8938 There are a couple of changes in the 0.3.5 that may affect
8939 compatibility. First, the default version for newly created onion
8940 services is now v3. Use the HiddenServiceVersion option if you want to
8941 override this. Second, some log messages related to bootstrapping have
8942 changed; if you use stem, you may need to update to the latest version
8943 so it will recognize them.
8945 We have designated 0.3.5 as a "long-term support" (LTS) series: we
8946 will continue to patch major bugs in typical configurations of 0.3.5
8947 until at least 1 Feb 2022. (We do not plan to provide long-term
8948 support for embedding, Rust support, NSS support, running a directory
8949 authority, or unsupported platforms. For these, you will need to stick
8950 with the latest stable release.)
8952 Below are the changes since 0.3.5.6-rc. For a complete list of changes
8953 since 0.3.4.9, see the ReleaseNotes file.
8955 o Major bugfixes (relay, directory):
8956 - Always reactivate linked connections in the main loop so long as
8957 any linked connection has been active. Previously, connections
8958 serving directory information wouldn't get reactivated after the
8959 first chunk of data was sent (usually 32KB), which would prevent
8960 clients from bootstrapping. Fixes bug 28912; bugfix on
8961 0.3.4.1-alpha. Patch by "cypherpunks3".
8963 o Minor features (compilation):
8964 - When possible, place our warning flags in a separate file, to
8965 avoid flooding verbose build logs. Closes ticket 28924.
8967 o Minor features (geoip):
8968 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8969 Country database. Closes ticket 29012.
8971 o Minor features (OpenSSL bug workaround):
8972 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8973 key export function from handling long labels. When this bug is
8974 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8975 version of OpenSSL without this bug when it becomes available.
8976 Closes ticket 28973.
8978 o Minor features (performance):
8979 - Remove about 96% of the work from the function that we run at
8980 startup to test our curve25519_basepoint implementation. Since
8981 this function has yet to find an actual failure, we now only run
8982 it for 8 iterations instead of 200. Based on our profile
8983 information, this change should save around 8% of our startup time
8984 on typical desktops, and may have a similar effect on other
8985 platforms. Closes ticket 28838.
8986 - Stop re-validating our hardcoded Diffie-Hellman parameters on
8987 every startup. Doing this wasted time and cycles, especially on
8988 low-powered devices. Closes ticket 28851.
8990 o Minor bugfixes (compilation):
8991 - Fix compilation for Android by adding a missing header to
8992 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
8994 o Minor bugfixes (correctness):
8995 - Fix an unreached code path where we checked the value of
8996 "hostname" inside send_resolved_hostname_cell(). Previously, we
8997 used it before checking it; now we check it first. Fixes bug
8998 28879; bugfix on 0.1.2.7-alpha.
9000 o Minor bugfixes (testing):
9001 - Make sure that test_rebind.py actually obeys its timeout, even
9002 when it receives a large number of log messages. Fixes bug 28883;
9003 bugfix on 0.3.5.4-alpha.
9004 - Stop running stem's unit tests as part of "make test-stem", but
9005 continue to run stem's unit and online tests during "make test-
9006 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
9008 o Minor bugfixes (windows services):
9009 - Make Tor start correctly as an NT service again: previously it was
9010 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
9012 o Code simplification and refactoring:
9013 - When parsing a port configuration, make it more obvious to static
9014 analyzer tools that we always initialize the address. Closes
9018 Changes in version 0.3.5.6-rc - 2018-12-18
9019 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
9020 It is the first release candidate in the 0.3.5.x series; if no further
9021 huge bugs are found, our next release may be the stable 0.3.5.x.
9023 o Minor features (continuous integration, Windows):
9024 - Always show the configure and test logs, and upload them as build
9025 artifacts, when building for Windows using Appveyor CI.
9028 o Minor features (fallback directory list):
9029 - Replace the 150 fallbacks originally introduced in Tor
9030 0.3.3.1-alpha in January 2018 (of which ~115 were still
9031 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
9032 removed) generated in December 2018. Closes ticket 24803.
9034 o Minor features (geoip):
9035 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
9036 Country database. Closes ticket 28744.
9038 o Minor bugfixes (compilation):
9039 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
9040 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
9042 o Minor bugfixes (continuous integration, Windows):
9043 - Explicitly specify the path to the OpenSSL library and do not
9044 download OpenSSL from Pacman, but instead use the library that is
9045 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
9047 o Minor bugfixes (onion service v3):
9048 - When deleting an ephemeral onion service (DEL_ONION), do not close
9049 any rendezvous circuits in order to let the existing client
9050 connections finish by themselves or closed by the application. The
9051 HS v2 is doing that already so now we have the same behavior for
9052 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
9054 o Minor bugfixes (restart-in-process, boostrap):
9055 - Add missing resets of bootstrap tracking state when shutting down
9056 (regression caused by ticket 27169). Fixes bug 28524; bugfix
9059 o Minor bugfixes (testing):
9060 - Use a separate DataDirectory for the test_rebind script.
9061 Previously, this script would run using the default DataDirectory,
9062 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
9063 Patch from Taylor R Campbell.
9064 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
9065 bugfix on 0.3.0.1-alpha.
9067 o Minor bugfixes (Windows):
9068 - Correctly identify Windows 8.1, Windows 10, and Windows Server
9069 2008 and later from their NT versions. Fixes bug 28096; bugfix on
9070 0.2.2.34; reported by Keifer Bly.
9071 - On recent Windows versions, the GetVersionEx() function may report
9072 an earlier Windows version than the running OS. To avoid user
9073 confusion, add "[or later]" to Tor's version string on affected
9074 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
9076 - Remove Windows versions that were never supported by the
9077 GetVersionEx() function. Stop duplicating the latest Windows
9078 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
9079 reported by Keifer Bly.
9082 - Increase logging and tag all log entries with timestamps in
9083 test_rebind.py. Provides diagnostics for issue 28229.
9085 o Code simplification and refactoring (shared random, dirauth):
9086 - Change many tor_assert() to use BUG() instead. The idea is to not
9087 crash a dirauth but rather scream loudly with a stacktrace and let
9088 it continue run. The shared random subsystem is very resilient and
9089 if anything wrong happens with it, at worst a non coherent value
9090 will be put in the vote and discarded by the other authorities.
9091 Closes ticket 19566.
9093 o Documentation (onion services):
9094 - Document in the man page that changing ClientOnionAuthDir value or
9095 adding a new file in the directory will not work at runtime upon
9096 sending a HUP if Sandbox 1. Closes ticket 28128.
9097 - Note in the man page that the only real way to fully revoke an
9098 onion service v3 client authorization is by restarting the tor
9099 process. Closes ticket 28275.
9102 Changes in version 0.3.5.5-alpha - 2018-11-16
9103 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
9104 including several that we hope to backport to older release series in
9107 o Major bugfixes (OpenSSL, portability):
9108 - Fix our usage of named groups when running as a TLS 1.3 client in
9109 OpenSSL 1.1.1. Previously, we only initialized EC groups when
9110 running as a relay, which caused clients to fail to negotiate TLS
9111 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
9114 o Minor features (geoip):
9115 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
9116 Country database. Closes ticket 28395.
9118 o Minor bugfixes (compilation):
9119 - Initialize a variable unconditionally in aes_new_cipher(), since
9120 some compilers cannot tell that we always initialize it before
9121 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
9123 o Minor bugfixes (connection, relay):
9124 - Avoid a logging a BUG() stacktrace when closing connection held
9125 open because the write side is rate limited but not the read side.
9126 Now, the connection read side is simply shut down until Tor is
9127 able to flush the connection and close it. Fixes bug 27750; bugfix
9130 o Minor bugfixes (continuous integration, Windows):
9131 - Manually configure the zstd compiler options, when building using
9132 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
9133 not come with a pkg-config file. Fixes bug 28454; bugfix
9135 - Stop using an external OpenSSL install, and stop installing MSYS2
9136 packages, when building using mingw on Appveyor Windows CI. Fixes
9137 bug 28399; bugfix on 0.3.4.1-alpha.
9139 o Minor bugfixes (documentation):
9140 - Make Doxygen work again after the code movement in the 0.3.5
9141 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
9143 o Minor bugfixes (Linux seccomp2 sandbox):
9144 - Permit the "shutdown()" system call, which is apparently used by
9145 OpenSSL under some circumstances. Fixes bug 28183; bugfix
9148 o Minor bugfixes (logging):
9149 - Stop talking about the Named flag in log messages. Clients have
9150 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
9153 o Minor bugfixes (memory leaks):
9154 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
9155 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
9157 o Minor bugfixes (onion services):
9158 - On an intro point for a version 3 onion service, stop closing
9159 introduction circuits on an NACK. This lets the client decide
9160 whether to reuse the circuit or discard it. Previously, we closed
9161 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
9162 0.3.2.1-alpha. Patch by Neel Chaunan.
9163 - When replacing a descriptor in the client cache, make sure to
9164 close all client introduction circuits for the old descriptor, so
9165 we don't end up with unusable leftover circuits. Fixes bug 27471;
9166 bugfix on 0.3.2.1-alpha.
9169 Changes in version 0.3.5.4-alpha - 2018-11-08
9170 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
9171 improves our continuous integration support. It continues our attempts
9172 to stabilize this alpha branch and build it into a foundation for an
9173 acceptable long-term-support release.
9175 o Major bugfixes (compilation, rust):
9176 - Rust tests can now build and run successfully with the
9177 --enable-fragile-hardening option enabled. Doing this currently
9178 requires the rust beta channel; it will be possible with stable
9179 rust once Rust version 1.31 is released. Patch from Alex Crichton.
9180 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
9182 o Major bugfixes (embedding, main loop):
9183 - When DisableNetwork becomes set, actually disable periodic events
9184 that are already enabled. (Previously, we would refrain from
9185 enabling new ones, but we would leave the old ones turned on.)
9186 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
9188 o Minor features (continuous integration):
9189 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
9191 - Add new CI job to Travis configuration to run stem-based
9192 integration tests. Closes ticket 27913.
9194 o Minor features (Windows, continuous integration):
9195 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
9196 Appveyor's CI. Closes ticket 28318.
9198 o Minor bugfixes (C correctness, also in 0.3.4.9):
9199 - Avoid undefined behavior in an end-of-string check when parsing
9200 the BEGIN line in a directory object. Fixes bug 28202; bugfix
9203 o Minor bugfixes (compilation):
9204 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
9205 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
9207 o Minor bugfixes (compilation, OpenSolaris):
9208 - Fix compilation on OpenSolaris and its descendants by adding a
9209 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
9212 o Minor bugfixes (configuration):
9213 - Refuse to start with relative file paths and RunAsDaemon set
9214 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
9217 o Minor bugfixes (directory authority, also in 0.3.4.9):
9218 - Log additional info when we get a relay that shares an ed25519 ID
9219 with a different relay, instead of a BUG() warning with a
9220 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
9222 o Minor bugfixes (onion service v3):
9223 - Build the service descriptor's signing key certificate before
9224 uploading, so we always have a fresh one: leaving no chances for
9225 it to expire service side. Fixes bug 27838; bugfix
9228 o Minor bugfixes (onion service v3, client authorization):
9229 - Fix an assert() when adding a client authorization for the first
9230 time and then sending a HUP signal to the service. Before that,
9231 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
9233 o Minor bugfixes (onion services):
9234 - Unless we have explicitly set HiddenServiceVersion, detect the
9235 onion service version and then look for invalid options.
9236 Previously, we did the reverse, but that broke existing configs
9237 which were pointed to a v2 service and had options like
9238 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
9239 0.3.5.1-alpha. Patch by Neel Chauhan.
9241 o Minor bugfixes (portability):
9242 - Make the OPE code (which is used for v3 onion services) run
9243 correctly on big-endian platforms. Fixes bug 28115; bugfix
9246 o Minor bugfixes (protover, rust):
9247 - Reject extra commas in version strings. Fixes bug 27197; bugfix
9250 o Minor bugfixes (relay shutdown, systemd):
9251 - Notify systemd of ShutdownWaitLength so it can be set to longer
9252 than systemd's TimeoutStopSec. In Tor's systemd service file, set
9253 TimeoutSec to 60 seconds to allow Tor some time to shut down.
9254 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
9256 o Minor bugfixes (rust, also in 0.3.4.9):
9257 - Fix a potential null dereference in protover_all_supported(). Add
9258 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
9259 - Return a string that can be safely freed by C code, not one
9260 created by the rust allocator, in protover_all_supported(). Fixes
9261 bug 27740; bugfix on 0.3.3.1-alpha.
9263 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
9264 - Fix an API mismatch in the rust implementation of
9265 protover_compute_vote(). This bug could have caused crashes on any
9266 directory authorities running Tor with Rust (which we do not yet
9267 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
9269 o Minor bugfixes (testing):
9270 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
9271 27968; bugfix on 0.3.5.1-alpha.
9273 o Minor bugfixes (testing, also in 0.3.4.9):
9274 - Treat backtrace test failures as expected on BSD-derived systems
9275 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
9276 (FreeBSD failures have been treated as expected since 18204 in
9277 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
9279 o Documentation (onion service manpage):
9280 - Improve HSv3 client authorization by making some options more
9281 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
9284 Changes in version 0.3.4.9 - 2018-11-02
9285 Tor 0.3.4.9 is the second stable release in its series; it backports
9286 numerous fixes, including a fix for a bandwidth management bug that
9287 was causing memory exhaustion on relays. Anyone running an earlier
9288 version of Tor 0.3.4.9 should upgrade.
9290 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
9291 - Fix compilation on ARM (and other less-used CPUs) when compiling
9292 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9294 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
9295 - Make sure Tor bootstraps and works properly if only the
9296 ControlPort is set. Prior to this fix, Tor would only bootstrap
9297 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9298 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9300 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
9301 - When our write bandwidth limit is exhausted, stop writing on the
9302 connection. Previously, we had a typo in the code that would make
9303 us stop reading instead, leading to relay connections being stuck
9304 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9307 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
9308 - Fix a use-after-free error that could be caused by passing Tor an
9309 impossible set of options that would fail during options_act().
9310 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9312 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
9313 - Don't do a distcheck with --disable-module-dirauth in Travis.
9314 Implements ticket 27252.
9315 - Only run one online rust build in Travis, to reduce network
9316 errors. Skip offline rust builds on Travis for Linux gcc, because
9317 they're redundant. Implements ticket 27252.
9318 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9319 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9320 Linux with default settings, because all the non-default builds
9321 use gcc on Linux. Implements ticket 27252.
9323 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
9324 - Use the Travis Homebrew addon to install packages on macOS during
9325 Travis CI. The package list is the same, but the Homebrew addon
9326 does not do a `brew update` by default. Implements ticket 27738.
9328 o Minor features (geoip):
9329 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9330 Country database. Closes ticket 27991.
9332 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
9333 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9334 difference algorithm for 32-bit Apple platforms. Previously, it
9335 would overflow when calculating the difference between two times
9336 more than 47 days apart. Fixes part of bug 27139; bugfix
9338 - Improve the precision of our 32-bit millisecond difference
9339 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9340 bugfix on 0.3.4.1-alpha.
9341 - Relax the tolerance on the mainloop/update_time_jumps test when
9342 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9345 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
9346 - Avoid undefined behavior in an end-of-string check when parsing
9347 the BEGIN line in a directory object. Fixes bug 28202; bugfix
9350 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
9351 - Only install the necessary mingw packages during our appveyor
9352 builds. This change makes the build a little faster, and prevents
9353 a conflict with a preinstalled mingw openssl that appveyor now
9354 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
9356 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
9357 - Rewrite our assertion macros so that they no longer suppress the
9358 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9360 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
9361 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9362 27464; bugfix on 0.3.4.1-alpha.
9364 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
9365 - Log additional info when we get a relay that shares an ed25519 ID
9366 with a different relay, instead making a BUG() warning. Fixes bug
9367 27800; bugfix on 0.3.2.1-alpha.
9369 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
9370 - Avoid a double-close when shutting down a stalled directory
9371 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9373 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
9374 - Fix a bug warning when closing an HTTP tunnel connection due to an
9375 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9378 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
9379 - Ensure circuitmux queues are empty before scheduling or sending
9380 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9382 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
9383 - When the onion service directory can't be created or has the wrong
9384 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9387 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
9388 - Close all SOCKS request (for the same .onion) if the newly fetched
9389 descriptor is unusable. Before that, we would close only the first
9390 one leaving the other hanging and let to time out by themselves.
9391 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9393 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
9394 - When selecting a v3 rendezvous point, don't only look at the
9395 protover, but also check whether the curve25519 onion key is
9396 present. This way we avoid picking a relay that supports the v3
9397 rendezvous but for which we don't have the microdescriptor. Fixes
9398 bug 27797; bugfix on 0.3.2.1-alpha.
9400 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
9401 - Reject protocol names containing bytes other than alphanumeric
9402 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9405 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
9406 - Compute protover votes correctly in the rust version of the
9407 protover code. Previously, the protover rewrite in 24031 allowed
9408 repeated votes from the same voter for the same protocol version
9409 to be counted multiple times in protover_compute_vote(). Fixes bug
9410 27649; bugfix on 0.3.3.5-rc.
9411 - Reject protover names that contain invalid characters. Fixes bug
9412 27687; bugfix on 0.3.3.1-alpha.
9414 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
9415 - protover_all_supported() would attempt to allocate up to 16GB on
9416 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9417 bugfix on 0.3.3.5-rc.
9419 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
9420 - Fix an API mismatch in the rust implementation of
9421 protover_compute_vote(). This bug could have caused crashes on any
9422 directory authorities running Tor with Rust (which we do not yet
9423 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
9425 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
9426 - Fix a potential null dereference in protover_all_supported(). Add
9427 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
9428 - Return a string that can be safely freed by C code, not one
9429 created by the rust allocator, in protover_all_supported(). Fixes
9430 bug 27740; bugfix on 0.3.3.1-alpha.
9432 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
9433 - If a unit test running in a subprocess exits abnormally or with a
9434 nonzero status code, treat the test as having failed, even if the
9435 test reported success. Without this fix, memory leaks don't cause
9436 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9437 bugfix on 0.2.2.4-alpha.
9439 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
9440 - Make the hs_service tests use the same time source when creating
9441 the introduction point and when testing it. Now tests work better
9442 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9445 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
9446 - Treat backtrace test failures as expected on BSD-derived systems
9447 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
9448 (FreeBSD failures have been treated as expected since 18204 in
9449 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
9452 Changes in version 0.3.5.3-alpha - 2018-10-17
9453 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
9454 versions. One important fix for relays addresses a problem with rate-
9455 limiting code from back in 0.3.4.x: If the fix works out, we'll be
9456 backporting it soon. This release is still an alpha, but we hope it's
9457 getting closer and closer to stability.
9459 o Major features (onion services):
9460 - Version 3 onion services can now use the per-service
9461 HiddenServiceExportCircuitID option to differentiate client
9462 circuits. It communicates with the service by using the HAProxy
9463 protocol to assign virtual IP addresses to inbound client
9464 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
9466 o Major bugfixes (compilation):
9467 - Fix compilation on ARM (and other less-used CPUs) when compiling
9468 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9470 o Major bugfixes (initialization, crash):
9471 - Fix an assertion crash that would stop Tor from starting up if it
9472 tried to activate a periodic event too early. Fixes bug 27861;
9473 bugfix on 0.3.5.1-alpha.
9475 o Major bugfixes (mainloop, bootstrap):
9476 - Make sure Tor bootstraps and works properly if only the
9477 ControlPort is set. Prior to this fix, Tor would only bootstrap
9478 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9479 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9481 o Major bugfixes (relay):
9482 - When our write bandwidth limit is exhausted, stop writing on the
9483 connection. Previously, we had a typo in the code that would make
9484 us stop reading instead, leading to relay connections being stuck
9485 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9488 o Minor features (continuous integration):
9489 - Use the Travis Homebrew addon to install packages on macOS during
9490 Travis CI. The package list is the same, but the Homebrew addon
9491 does not do a `brew update` by default. Implements ticket 27738.
9492 - Report what program produced the mysterious core file that we
9493 occasionally see on Travis CI during make distcheck. Closes
9496 o Minor features (geoip):
9497 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9498 Country database. Closes ticket 27991.
9500 o Minor bugfixes (code safety):
9501 - Rewrite our assertion macros so that they no longer suppress the
9502 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9505 o Minor bugfixes (compilation):
9506 - Compile the ed25519-donna code with a correct declaration of
9507 crypto_strongest_rand(). Previously, we built it with one type,
9508 but linked it against another in the unit tests, which caused
9509 compilation failures with LTO enabled. This could have caused
9510 other undefined behavior in the tests. Fixes bug 27728; bugfix
9513 o Minor bugfixes (compilation, netbsd):
9514 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
9517 o Minor bugfixes (continuous integration, appveyor):
9518 - Install only the necessary mingw packages during our appveyor
9519 builds. This change makes the build a little faster, and prevents
9520 a conflict with a preinstalled mingw openssl that appveyor now
9521 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
9523 o Minor bugfixes (directory permissions):
9524 - When a user requests a group-readable DataDirectory, give it to
9525 them. Previously, when the DataDirectory and the CacheDirectory
9526 were the same, the default setting (0) for
9527 CacheDirectoryGroupReadable would override the setting for
9528 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
9531 o Minor bugfixes (memory leaks):
9532 - Fix a small memory leak when calling Tor with --dump-config. Fixes
9533 bug 27893; bugfix on 0.3.2.1-alpha.
9535 o Minor bugfixes (networking):
9536 - In retry_listeners_ports(), make sure that we're removing a member
9537 of old_conns smartlist at most once. Fixes bug 27808; bugfix
9539 - Refrain from attempting socket rebinding when old and new
9540 listeners are in different address families. Fixes bug 27928;
9541 bugfix on 0.3.5.1-alpha.
9543 o Minor bugfixes (onion service v3):
9544 - Stop dumping a stack trace when trying to connect to an intro
9545 point without having a descriptor for it. Fixes bug 27774; bugfix
9547 - Don't warn so loudly when Tor is unable to decode an onion
9548 descriptor. This can now happen as a normal use case if a client
9549 gets a descriptor with client authorization but the client is not
9550 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
9551 - When selecting a v3 rendezvous point, don't only look at the
9552 protover, but also check whether the curve25519 onion key is
9553 present. This way we avoid picking a relay that supports the v3
9554 rendezvous but for which we don't have the microdescriptor. Fixes
9555 bug 27797; bugfix on 0.3.2.1-alpha.
9557 o Minor bugfixes (protover):
9558 - Reject protocol names containing bytes other than alphanumeric
9559 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9562 o Minor bugfixes (testing):
9563 - Make the hs_service tests use the same time source when creating
9564 the introduction point and when testing it. Now tests work better
9565 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9567 - In test_rebind.py, check if the Python version is in the supported
9568 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
9570 o Code simplification and refactoring:
9571 - Divide more large Tor source files -- especially ones that span
9572 multiple areas of functionality -- into smaller parts, including
9573 onion.c and main.c. Closes ticket 26747.
9574 - Divide the "routerparse.c" module into separate modules for each
9575 group of parsed objects. Closes ticket 27924.
9576 - Move protover_rust.c to the same place protover.c was moved to.
9577 Closes ticket 27814.
9578 - Split directory.c into separate pieces for client, server, and
9579 common functionality. Closes ticket 26744.
9580 - Split the non-statistics-related parts from the rephist.c and
9581 geoip.c modules. Closes ticket 27892.
9582 - Split the router.c file into relay-only and shared components, to
9583 help with future modularization. Closes ticket 27864.
9586 - In the tor-resolve(1) manpage, fix the reference to socks-
9587 extensions.txt by adding a web URL. Resolves ticket 27853.
9588 - Mention that we require Python to be 2.7 or newer for some
9589 integration tests that we ship with Tor. Resolves ticket 27677.
9592 Changes in version 0.3.5.2-alpha - 2018-09-21
9593 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
9594 that made Tor think it had run out of sockets. Anybody running a relay
9595 or an onion service on 0.3.5.1-alpha should upgrade.
9597 o Major bugfixes (relay bandwidth statistics):
9598 - When we close relayed circuits, report the data in the circuit
9599 queues as being written in our relay bandwidth stats. This
9600 mitigates guard discovery and other attacks that close circuits
9601 for the explicit purpose of noticing this discrepancy in
9602 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
9604 o Major bugfixes (socket accounting):
9605 - In our socket accounting code, count a socket as closed even when
9606 it is closed indirectly by the TLS layer. Previously, we would
9607 count these sockets as still in use, and incorrectly believe that
9608 we had run out of sockets. Fixes bug 27795; bugfix
9611 o Minor bugfixes (32-bit OSX and iOS, timing):
9612 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9613 difference algorithm for 32-bit Apple platforms. Previously, it
9614 would overflow when calculating the difference between two times
9615 more than 47 days apart. Fixes part of bug 27139; bugfix
9617 - Improve the precision of our 32-bit millisecond difference
9618 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9619 bugfix on 0.3.4.1-alpha.
9620 - Relax the tolerance on the mainloop/update_time_jumps test when
9621 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9624 o Minor bugfixes (onion service v3):
9625 - Close all SOCKS request (for the same .onion) if the newly fetched
9626 descriptor is unusable. Before that, we would close only the first
9627 one leaving the other hanging and let to time out by themselves.
9628 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9630 o Minor bugfixes (memory leak):
9631 - Fix an unlikely memory leak when trying to read a private key from
9632 a ridiculously large file. Fixes bug 27764; bugfix on
9633 0.3.5.1-alpha. This is CID 1439488.
9635 o Minor bugfixes (NSS):
9636 - Correctly detect failure to open a dummy TCP socket when stealing
9637 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
9640 o Minor bugfixes (rust):
9641 - protover_all_supported() would attempt to allocate up to 16GB on
9642 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9643 bugfix on 0.3.3.5-rc.
9645 o Minor bugfixes (testing):
9646 - Revise the "conditionvar_timeout" test so that it succeeds even on
9647 heavily loaded systems where the test threads are not scheduled
9648 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
9650 o Code simplification and refactoring:
9651 - Divide the routerlist.c and dirserv.c modules into smaller parts.
9652 Closes ticket 27799.
9655 Changes in version 0.3.5.1-alpha - 2018-09-18
9656 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
9657 client authorization for modern (v3) onion services, improves
9658 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
9659 support for NSS in place of OpenSSL, and much more.
9661 o Major features (onion services, UI change):
9662 - For a newly created onion service, the default version is now 3.
9663 Tor still supports existing version 2 services, but the operator
9664 now needs to set "HiddenServiceVersion 2" in order to create a new
9665 version 2 service. For existing services, Tor now learns the
9666 version by reading the key file. Closes ticket 27215.
9668 o Major features (relay, UI change):
9669 - Relays no longer run as exits by default. If the "ExitRelay"
9670 option is auto (or unset), and no exit policy is specified with
9671 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
9672 Previously in this case, we allowed exit traffic and logged a
9673 warning message. Closes ticket 21530. Patch by Neel Chauhan.
9674 - Tor now validates that the ContactInfo config option is valid UTF-
9675 8 when parsing torrc. Closes ticket 27428.
9677 o Major features (bootstrap):
9678 - Don't report directory progress until after a connection to a
9679 relay or bridge has succeeded. Previously, we'd report 80%
9680 progress based on cached directory information when we couldn't
9681 even connect to the network. Closes ticket 27169.
9683 o Major features (new code layout):
9684 - Nearly all of Tor's source code has been moved around into more
9685 logical places. The "common" directory is now divided into a set
9686 of libraries in "lib", and files in the "or" directory have been
9687 split into "core" (logic absolutely needed for onion routing),
9688 "feature" (independent modules in Tor), and "app" (to configure
9689 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
9690 more information. Closes ticket 26481.
9692 This refactoring is not complete: although the libraries have been
9693 refactored to be acyclic, the main body of Tor is still too
9694 interconnected. We will attempt to improve this in the future.
9696 o Major features (onion services v3):
9697 - Implement onion service client authorization at the descriptor
9698 level: only authorized clients can decrypt a service's descriptor
9699 to find out how to contact it. A new torrc option was added to
9700 control this client side: ClientOnionAuthDir <path>. On the
9701 service side, if the "authorized_clients/" directory exists in the
9702 onion service directory path, client configurations are read from
9703 the files within. See the manpage for more details. Closes ticket
9704 27547. Patch done by Suphanat Chunhapanya (haxxpop).
9705 - Improve revision counter generation in next-gen onion services.
9706 Onion services can now scale by hosting multiple instances on
9707 different hosts without synchronization between them, which was
9708 previously impossible because descriptors would get rejected by
9709 HSDirs. Addresses ticket 25552.
9711 o Major features (portability, cryptography, experimental, TLS):
9712 - Tor now has the option to compile with the NSS library instead of
9713 OpenSSL. This feature is experimental, and we expect that bugs may
9714 remain. It is mainly intended for environments where Tor's
9715 performance is not CPU-bound, and where NSS is already known to be
9716 installed. To try it out, configure Tor with the --enable-nss
9717 flag. Closes tickets 26631, 26815, and 26816.
9719 If you are experimenting with this option and using an old cached
9720 consensus, Tor may fail to start. To solve this, delete your
9721 "cached-consensus" and "cached-microdesc-consensus" files,
9722 (if present), and restart Tor.
9724 o Major bugfixes (directory authority):
9725 - Actually check that the address we get from DirAuthority
9726 configuration line is valid IPv4. Explicitly disallow DirAuthority
9727 address to be a DNS hostname. Fixes bug 26488; bugfix
9730 o Major bugfixes (restart-in-process):
9731 - Fix a use-after-free error that could be caused by passing Tor an
9732 impossible set of options that would fail during options_act().
9733 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9735 o Minor features (admin tools):
9736 - Add a new --key-expiration option to print the expiration date of
9737 the signing cert in an ed25519_signing_cert file. Resolves
9740 o Minor features (build):
9741 - If you pass the "--enable-pic" option to configure, Tor will try
9742 to tell the compiler to build position-independent code suitable
9743 to link into a dynamic library. (The default remains -fPIE, for
9744 code suitable for a relocatable executable.) Closes ticket 23846.
9746 o Minor features (code correctness, testing):
9747 - Tor's build process now includes a "check-includes" make target to
9748 verify that no module of Tor relies on any headers from a higher-
9749 level module. We hope to use this feature over time to help
9750 refactor our codebase. Closes ticket 26447.
9752 o Minor features (code layout):
9753 - We have a new "lowest-level" error-handling API for use by code
9754 invoked from within the logging module. With this interface, the
9755 logging code is no longer at risk of calling into itself if a
9756 failure occurs while it is trying to log something. Closes
9759 o Minor features (compilation):
9760 - Tor's configure script now supports a --with-malloc= option to
9761 select your malloc implementation. Supported options are
9762 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
9763 default). Addresses part of ticket 20424. Based on a patch from
9766 o Minor features (config):
9767 - The "auto" keyword in torrc is now case-insensitive. Closes
9770 o Minor features (continuous integration):
9771 - Don't do a distcheck with --disable-module-dirauth in Travis.
9772 Implements ticket 27252.
9773 - Install libcap-dev and libseccomp2-dev so these optional
9774 dependencies get tested on Travis CI. Closes ticket 26560.
9775 - Only run one online rust build in Travis, to reduce network
9776 errors. Skip offline rust builds on Travis for Linux gcc, because
9777 they're redundant. Implements ticket 27252.
9778 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9779 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9780 Linux with default settings, because all the non-default builds
9781 use gcc on Linux. Implements ticket 27252.
9783 o Minor features (controller):
9784 - Emit CIRC_BW events as soon as we detect that we processed an
9785 invalid or otherwise dropped cell on a circuit. This allows
9786 vanguards and other controllers to react more quickly to dropped
9787 cells. Closes ticket 27678.
9788 - For purposes of CIRC_BW-based dropped cell detection, track half-
9789 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
9790 bias check cells to arrive without counting it as dropped until
9791 either the END arrives, or the windows are empty. Closes
9793 - Implement a 'GETINFO md/all' controller command to enable getting
9794 all known microdescriptors. Closes ticket 8323.
9795 - The GETINFO command now support an "uptime" argument, to return
9796 Tor's uptime in seconds. Closes ticket 25132.
9798 o Minor features (denial-of-service avoidance):
9799 - Make our OOM handler aware of the DNS cache so that it doesn't
9800 fill up the memory. This check is important for our DoS mitigation
9801 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
9803 o Minor features (development):
9804 - Tor's makefile now supports running the "clippy" Rust style tool
9805 on our Rust code. Closes ticket 22156.
9807 o Minor features (directory authority):
9808 - There is no longer an artificial upper limit on the length of
9809 bandwidth lines. Closes ticket 26223.
9810 - When a bandwidth file is used to obtain the bandwidth measurements,
9811 include this bandwidth file headers in the votes. Closes
9813 - Improved support for networks with only a single authority or a
9814 single fallback directory. Patch from Gabriel Somlo. Closes
9817 o Minor features (embedding API):
9818 - The Tor controller API now supports a function to launch Tor with
9819 a preconstructed owning controller FD, so that embedding
9820 applications don't need to manage controller ports and
9821 authentication. Closes ticket 24204.
9822 - The Tor controller API now has a function that returns the name
9823 and version of the backend implementing the API. Closes
9826 o Minor features (geoip):
9827 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
9828 Country database. Closes ticket 27631.
9830 o Minor features (memory management):
9831 - Get Libevent to use the same memory allocator as Tor, by calling
9832 event_set_mem_functions() during initialization. Resolves
9835 o Minor features (memory usage):
9836 - When not using them, store legacy TAP public onion keys in DER-
9837 encoded format, rather than as expanded public keys. This should
9838 save several megabytes on typical clients. Closes ticket 27246.
9840 o Minor features (OpenSSL):
9841 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
9842 than our own. Resolves ticket 19979.
9844 o Minor features (Rust, code quality):
9845 - Improve rust code quality in the rust protover implementation by
9846 making it more idiomatic. Includes changing an internal API to
9847 take &str instead of &String. Closes ticket 26492.
9849 o Minor features (testing):
9850 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
9851 chutney. Implements ticket 27211.
9853 o Minor features (tor-resolve):
9854 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
9855 Side-effect of the refactoring for ticket 26526.
9857 o Minor features (UI):
9858 - Log each included configuration file or directory as we read it,
9859 to provide more visibility about where Tor is reading from. Patch
9860 from Unto Sten; closes ticket 27186.
9861 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
9862 Closes ticket 26703.
9864 o Minor bugfixes (bootstrap):
9865 - Try harder to get descriptors in non-exit test networks, by using
9866 the mid weight for the third hop when there are no exits. Fixes
9867 bug 27237; bugfix on 0.2.6.2-alpha.
9869 o Minor bugfixes (C correctness):
9870 - Avoid casting smartlist index to int implicitly, as it may trigger
9871 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
9872 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
9873 - Use time_t for all values in
9874 predicted_ports_prediction_time_remaining(). Rework the code that
9875 computes difference between durations/timestamps. Fixes bug 27165;
9876 bugfix on 0.3.1.1-alpha.
9878 o Minor bugfixes (client, memory usage):
9879 - When not running as a directory cache, there is no need to store
9880 the text of the current consensus networkstatus in RAM.
9881 Previously, however, clients would store it anyway, at a cost of
9882 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
9885 o Minor bugfixes (client, reachableaddresses):
9886 - Instead of adding a "reject *:*" line to ReachableAddresses when
9887 loading the configuration, add one to the policy after parsing it
9888 in parse_reachable_addresses(). This prevents extra "reject *.*"
9889 lines from accumulating on reloads. Fixes bug 20874; bugfix on
9890 0.1.1.5-alpha. Patch by Neel Chauhan.
9892 o Minor bugfixes (code quality):
9893 - Rename sandbox_getaddrinfo() and other functions to no longer
9894 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
9895 bugfix on 0.2.7.1-alpha.
9897 o Minor bugfixes (configuration, Onion Services):
9898 - In rend_service_parse_port_config(), disallow any input to remain
9899 after address-port pair was parsed. This will catch address and
9900 port being whitespace-separated by mistake of the user. Fixes bug
9901 27044; bugfix on 0.2.9.10.
9903 o Minor bugfixes (continuous integration):
9904 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9905 27464; bugfix on 0.3.4.1-alpha.
9907 o Minor bugfixes (controller):
9908 - Consider all routerinfo errors other than "not a server" to be
9909 transient for the purpose of "GETINFO exit-policy/*" controller
9910 request. Print stacktrace in the unlikely case of failing to
9911 recompute routerinfo digest. Fixes bug 27034; bugfix
9914 o Minor bugfixes (directory connection shutdown):
9915 - Avoid a double-close when shutting down a stalled directory
9916 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9918 o Minor bugfixes (HTTP tunnel):
9919 - Fix a bug warning when closing an HTTP tunnel connection due to an
9920 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9923 o Minor bugfixes (ipv6):
9924 - In addrs_in_same_network_family(), we choose the subnet size based
9925 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
9926 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
9927 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
9929 o Minor bugfixes (logging):
9930 - As a precaution, do an early return from log_addr_has_changed() if
9931 Tor is running as client. Also, log a stack trace for debugging as
9932 this function should only be called when Tor runs as server. Fixes
9933 bug 26892; bugfix on 0.1.1.9-alpha.
9934 - Refrain from mentioning bug 21018 in the logs, as it is already
9935 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
9937 o Minor bugfixes (logging, documentation):
9938 - When SafeLogging is enabled, scrub IP address in
9939 channel_tls_process_netinfo_cell(). Also, add a note to manpage
9940 that scrubbing is not guaranteed on loglevels below Notice. Fixes
9941 bug 26882; bugfix on 0.2.4.10-alpha.
9943 o Minor bugfixes (netflow padding):
9944 - Ensure circuitmux queues are empty before scheduling or sending
9945 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9947 o Minor bugfixes (onion service v2):
9948 - Log at level "info", not "warning", in the case that we do not
9949 have a consensus when a .onion request comes in. This can happen
9950 normally while bootstrapping. Fixes bug 27040; bugfix
9953 o Minor bugfixes (onion service v3):
9954 - When the onion service directory can't be created or has the wrong
9955 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9958 o Minor bugfixes (OS compatibility):
9959 - Properly handle configuration changes that move a listener to/from
9960 wildcard IP address. If the first attempt to bind a socket fails,
9961 close the old listener and try binding the socket again. Fixes bug
9962 17873; bugfix on 0.0.8pre-1.
9964 o Minor bugfixes (performance)::
9965 - Rework node_is_a_configured_bridge() to no longer call
9966 node_get_all_orports(), which was performing too many memory
9967 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
9969 o Minor bugfixes (relay statistics):
9970 - Update relay descriptor on bandwidth changes only when the uptime
9971 is smaller than 24h, in order to reduce the efficiency of guard
9972 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
9974 o Minor bugfixes (relays):
9975 - Consider the fact that we'll be making direct connections to our
9976 entry and guard nodes when computing the fraction of nodes that
9977 have their descriptors. Also, if we are using bridges and there is
9978 at least one bridge with a full descriptor, treat the fraction of
9979 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
9980 Patch by Neel Chauhan.
9981 - Update the message logged on relays when DirCache is disabled.
9982 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
9983 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
9985 o Minor bugfixes (rust, protover):
9986 - Compute protover votes correctly in the rust version of the
9987 protover code. Previously, the protover rewrite in 24031 allowed
9988 repeated votes from the same voter for the same protocol version
9989 to be counted multiple times in protover_compute_vote(). Fixes bug
9990 27649; bugfix on 0.3.3.5-rc.
9991 - Reject protover names that contain invalid characters. Fixes bug
9992 27687; bugfix on 0.3.3.1-alpha.
9994 o Minor bugfixes (testing):
9995 - Fix two unit tests to work when HOME environment variable is not
9996 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
9997 - If a unit test running in a subprocess exits abnormally or with a
9998 nonzero status code, treat the test as having failed, even if the
9999 test reported success. Without this fix, memory leaks don't cause
10000 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
10001 bugfix on 0.2.2.4-alpha.
10002 - When logging a version mismatch in our openssl_version tests,
10003 report the actual offending version strings. Fixes bug 26152;
10004 bugfix on 0.2.9.1-alpha.
10005 - Fix forking tests on Windows when there is a space somewhere in
10006 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
10008 o Code simplification and refactoring:
10009 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
10010 longer needed. Closes ticket 26502.
10011 - Include paths to header files within Tor are now qualified by
10012 directory within the top-level src directory.
10013 - Many structures have been removed from the centralized "or.h"
10014 header, and moved into their own headers. This will allow us to
10015 reduce the number of places in the code that rely on each
10016 structure's contents and layout. Closes ticket 26383.
10017 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
10018 - Remove GetAdaptersAddresses_fn_t. The code that used it was
10019 removed as part of the 26481 refactor. Closes ticket 27467.
10020 - Rework Tor SOCKS server code to use Trunnel and benefit from
10021 autogenerated functions for parsing and generating SOCKS wire
10022 format. New implementation is cleaner, more maintainable and
10023 should be less prone to heartbleed-style vulnerabilities.
10024 Implements a significant fraction of ticket 3569.
10025 - Split sampled_guards_update_from_consensus() and
10026 select_entry_guard_for_circuit() into subfunctions. In
10027 entry_guards_update_primary() unite three smartlist enumerations
10028 into one and move smartlist comparison code out of the function.
10029 Closes ticket 21349.
10030 - Tor now assumes that you have standards-conformant stdint.h and
10031 inttypes.h headers when compiling. Closes ticket 26626.
10032 - Unify our bloom filter logic. Previously we had two copies of this
10033 code: one for routerlist filtering, and one for address set
10034 calculations. Closes ticket 26510.
10035 - Use the simpler strcmpstart() helper in
10036 rend_parse_v2_service_descriptor instead of strncmp(). Closes
10038 - Utility functions that can perform a DNS lookup are now wholly
10039 separated from those that can't, in separate headers and C
10040 modules. Closes ticket 26526.
10043 - Copy paragraph and URL to Tor's code of conduct document from
10044 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
10045 - Remove old instructions from INSTALL document. Closes ticket 26588.
10046 - Warn users that they should not include MyFamily line(s) in their
10047 torrc when running Tor bridge. Closes ticket 26908.
10049 o Removed features:
10050 - Tor no longer supports building with the dmalloc library. For
10051 debugging memory issues, we suggest using gperftools or msan
10052 instead. Closes ticket 26426.
10053 - Tor no longer attempts to run on Windows environments without the
10054 GetAdaptersAddresses() function. This function has existed since
10055 Windows XP, which is itself already older than we support.
10056 - Remove Tor2web functionality for version 2 onion services. The
10057 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
10058 (This feature was never shipped in vanilla Tor and it was only
10059 possible to use this feature by building the support at compile
10060 time. Tor2webMode is not implemented for version 3 onion services.)
10061 Closes ticket 26367.
10064 Changes in version 0.2.9.17 - 2018-09-10
10065 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
10067 o Minor features (compatibility, backport from 0.3.4.8):
10068 - Tell OpenSSL to maintain backward compatibility with previous
10069 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10070 ciphers are disabled by default. Closes ticket 27344.
10072 o Minor features (continuous integration, backport from 0.3.4.7-rc):
10073 - Enable macOS builds in our Travis CI configuration. Closes
10075 - Install libcap-dev and libseccomp2-dev so these optional
10076 dependencies get tested on Travis CI. Closes ticket 26560.
10077 - Run asciidoc during Travis CI. Implements ticket 27087.
10078 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10080 o Minor features (geoip):
10081 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10082 Country database. Closes ticket 27089.
10084 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
10085 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10086 tell the compiler not to include the system malloc implementation.
10087 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10089 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10090 - Silence a spurious compiler warning on the GetAdaptersAddresses
10091 function pointer cast. This issue is already fixed by 26481 in
10092 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10093 bugfix on 0.2.3.11-alpha.
10094 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10095 supported, and always fails. Some compilers warn about the
10096 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10099 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10100 - Don't link or search for pthreads when building for Windows, even
10101 if we are using build environment (like mingw) that provides a
10102 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10104 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10105 - Skip a pair of unreliable key generation tests on Windows, until
10106 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10107 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10109 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10110 - Pass the module flags to distcheck configure, and log the flags
10111 before running configure. (Backported to 0.2.9 and later as a
10112 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10114 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10115 - When a Travis build fails, and showing a log fails, keep trying to
10116 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10117 - When we use echo in Travis, don't pass a --flag as the first
10118 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10120 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10121 - When voting for recommended versions, make sure that all of the
10122 versions are well-formed and parsable. Fixes bug 26485; bugfix
10125 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10126 - Fix a bug in out sandboxing rules for the openat() syscall.
10127 Previously, no openat() call would be permitted, which would break
10128 filesystem operations on recent glibc versions. Fixes bug 25440;
10129 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10131 o Minor bugfixes (onion services, backport from 0.3.4.8):
10132 - Silence a spurious compiler warning in
10133 rend_client_send_introduction(). Fixes bug 27463; bugfix
10136 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10137 - Log a protocol warning when single onion services or Tor2web clients
10138 fail to authenticate direct connections to relays.
10139 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10141 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10142 - Disable core dumps in test_bt.sh, to avoid failures in "make
10143 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10145 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10146 - Before running make test-network-all, delete old logs and test
10147 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10150 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10151 - Our "tortls/cert_matches_key" unit test no longer relies on
10152 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10153 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10154 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10156 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10157 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10158 27185; bugfix on 0.2.2.2-alpha.
10161 Changes in version 0.3.2.12 - 2018-09-10
10162 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
10164 o Minor features (compatibility, backport from 0.3.4.8):
10165 - Tell OpenSSL to maintain backward compatibility with previous
10166 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10167 ciphers are disabled by default. Closes ticket 27344.
10169 o Minor features (continuous integration, backport from 0.3.4.7-rc):
10170 - Enable macOS builds in our Travis CI configuration. Closes
10172 - Install libcap-dev and libseccomp2-dev so these optional
10173 dependencies get tested on Travis CI. Closes ticket 26560.
10174 - Run asciidoc during Travis CI. Implements ticket 27087.
10175 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10177 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
10178 - Use cargo cache in our Travis CI configuration. Closes
10181 o Minor features (controller, backport from 0.3.4.6-rc):
10182 - The control port now exposes the list of HTTPTunnelPorts and
10183 ExtOrPorts via GETINFO net/listeners/httptunnel and
10184 net/listeners/extor respectively. Closes ticket 26647.
10186 o Minor features (directory authorities, backport from 0.3.4.7-rc):
10187 - Authorities no longer vote to make the subprotocol version
10188 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10189 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10191 o Minor features (geoip):
10192 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10193 Country database. Closes ticket 27089.
10195 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
10196 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10197 tell the compiler not to include the system malloc implementation.
10198 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10199 - Don't try to use a pragma to temporarily disable the
10200 -Wunused-const-variable warning if the compiler doesn't support
10201 it. Fixes bug 26785; bugfix on 0.3.2.11.
10203 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10204 - Silence a spurious compiler warning on the GetAdaptersAddresses
10205 function pointer cast. This issue is already fixed by 26481 in
10206 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10207 bugfix on 0.2.3.11-alpha.
10208 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10209 supported, and always fails. Some compilers warn about the
10210 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10213 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10214 - Don't link or search for pthreads when building for Windows, even
10215 if we are using build environment (like mingw) that provides a
10216 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10218 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10219 - Skip a pair of unreliable key generation tests on Windows, until
10220 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10221 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10223 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10224 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10225 - Pass the module flags to distcheck configure, and log the flags
10226 before running configure. (Backported to 0.2.9 and later as a
10227 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10229 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10230 - When a Travis build fails, and showing a log fails, keep trying to
10231 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10232 - When we use echo in Travis, don't pass a --flag as the first
10233 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10235 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10236 - When voting for recommended versions, make sure that all of the
10237 versions are well-formed and parsable. Fixes bug 26485; bugfix
10240 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10241 - Fix a bug in out sandboxing rules for the openat() syscall.
10242 Previously, no openat() call would be permitted, which would break
10243 filesystem operations on recent glibc versions. Fixes bug 25440;
10244 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10246 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
10247 - Improve the log message when connection initiators fail to
10248 authenticate direct connections to relays. Fixes bug 26927; bugfix
10251 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
10252 - Fix bug that causes services to not ever rotate their descriptors
10253 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10256 o Minor bugfixes (onion services, backport from 0.3.4.8):
10257 - Silence a spurious compiler warning in
10258 rend_client_send_introduction(). Fixes bug 27463; bugfix
10261 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
10262 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10264 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10265 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10266 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10267 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10269 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10270 - Log a protocol warning when single onion services or Tor2web clients
10271 fail to authenticate direct connections to relays.
10272 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10274 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10275 - Disable core dumps in test_bt.sh, to avoid failures in "make
10276 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10278 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10279 - When running make test-network-all, use the mixed+hs-v2 network.
10280 (A previous fix to chutney removed v3 onion services from the
10281 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10282 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10283 - Before running make test-network-all, delete old logs and test
10284 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10287 o Minor bugfixes (testing, openssl compatibility):
10288 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
10289 internals. Previously, it relied on unsupported OpenSSL behavior in
10290 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
10291 bugfix on 0.2.5.1-alpha.
10293 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10294 - Our "tortls/cert_matches_key" unit test no longer relies on
10295 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10296 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10297 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10299 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10300 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10301 27185; bugfix on 0.2.2.2-alpha.
10304 Changes in version 0.3.3.10 - 2018-09-10
10305 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
10307 o Minor features (bug workaround, backport from 0.3.4.7-rc):
10308 - Compile correctly on systems that provide the C11 stdatomic.h
10309 header, but where C11 atomic functions don't actually compile.
10310 Closes ticket 26779; workaround for Debian issue 903709.
10312 o Minor features (compatibility, backport from 0.3.4.8):
10313 - Tell OpenSSL to maintain backward compatibility with previous
10314 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10315 ciphers are disabled by default. Closes ticket 27344.
10317 o Minor features (continuous integration, backport from 0.3.4.7-rc):
10318 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10319 - Enable macOS builds in our Travis CI configuration. Closes
10321 - Install libcap-dev and libseccomp2-dev so these optional
10322 dependencies get tested on Travis CI. Closes ticket 26560.
10323 - Run asciidoc during Travis CI. Implements ticket 27087.
10324 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10326 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
10327 - Use cargo cache in our Travis CI configuration. Closes
10330 o Minor features (controller, backport from 0.3.4.6-rc):
10331 - The control port now exposes the list of HTTPTunnelPorts and
10332 ExtOrPorts via GETINFO net/listeners/httptunnel and
10333 net/listeners/extor respectively. Closes ticket 26647.
10335 o Minor features (directory authorities, backport from 0.3.4.7-rc):
10336 - Authorities no longer vote to make the subprotocol version
10337 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10338 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10340 o Minor features (geoip):
10341 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10342 Country database. Closes ticket 27089.
10344 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
10345 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10346 tell the compiler not to include the system malloc implementation.
10347 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10348 - Don't try to use a pragma to temporarily disable the
10349 -Wunused-const-variable warning if the compiler doesn't support
10350 it. Fixes bug 26785; bugfix on 0.3.2.11.
10352 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10353 - Silence a spurious compiler warning on the GetAdaptersAddresses
10354 function pointer cast. This issue is already fixed by 26481 in
10355 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10356 bugfix on 0.2.3.11-alpha.
10357 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10358 supported, and always fails. Some compilers warn about the
10359 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10362 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10363 - Don't link or search for pthreads when building for Windows, even
10364 if we are using build environment (like mingw) that provides a
10365 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10367 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10368 - Skip a pair of unreliable key generation tests on Windows, until
10369 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10370 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10372 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10373 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10374 - Pass the module flags to distcheck configure, and log the flags
10375 before running configure. (Backported to 0.2.9 and later as a
10376 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10378 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10379 - When a Travis build fails, and showing a log fails, keep trying to
10380 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10381 - When we use echo in Travis, don't pass a --flag as the first
10382 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10384 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10385 - When voting for recommended versions, make sure that all of the
10386 versions are well-formed and parsable. Fixes bug 26485; bugfix
10389 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
10390 - Always call tor_free_all() when leaving tor_run_main(). When we
10391 did not, restarting tor in-process would cause an assertion
10392 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10394 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10395 - Fix a bug in our sandboxing rules for the openat() syscall.
10396 Previously, no openat() call would be permitted, which would break
10397 filesystem operations on recent glibc versions. Fixes bug 25440;
10398 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10400 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
10401 - Improve the log message when connection initiators fail to
10402 authenticate direct connections to relays. Fixes bug 26927; bugfix
10405 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
10406 - Fix bug that causes services to not ever rotate their descriptors
10407 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10410 o Minor bugfixes (onion services, backport from 0.3.4.8):
10411 - Silence a spurious compiler warning in
10412 rend_client_send_introduction(). Fixes bug 27463; bugfix
10415 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
10416 - Work around two different bugs in the OS X 10.10 and later SDKs
10417 that would prevent us from successfully targeting earlier versions
10418 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10420 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
10421 - Fix compilation of the unit tests on GNU/Hurd, which does not
10422 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10425 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
10426 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10428 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10429 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10430 - Protover parsing was accepting the presence of whitespace in
10431 version strings, which the C implementation would choke on, e.g.
10432 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10433 - Protover parsing was ignoring a 2nd hyphen and everything after
10434 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10436 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10437 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10438 - cd to ${abs_top_builddir}/src/rust before running cargo in
10439 src/test/test_rust.sh. This makes the working directory consistent
10440 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10442 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10443 - Log a protocol warning when single onion services or Tor2web clients
10444 fail to authenticate direct connections to relays.
10445 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10447 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10448 - Disable core dumps in test_bt.sh, to avoid failures in "make
10449 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10451 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10452 - When running make test-network-all, use the mixed+hs-v2 network.
10453 (A previous fix to chutney removed v3 onion services from the
10454 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10455 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10456 - Before running make test-network-all, delete old logs and test
10457 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10460 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10461 - Our "tortls/cert_matches_key" unit test no longer relies on
10462 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10463 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10464 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10466 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
10467 - Stop sending ed25519 link specifiers in v3 onion service introduce
10468 cells and descriptors, when the rendezvous or introduction point
10469 doesn't support ed25519 link authentication. Fixes bug 26627;
10470 bugfix on 0.3.2.4-alpha.
10472 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10473 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10474 27185; bugfix on 0.2.2.2-alpha.
10477 Changes in version 0.3.4.8 - 2018-09-10
10478 Tor 0.3.4.8 is the first stable release in its series; it includes
10479 compilation and portability fixes.
10481 The Tor 0.3.4 series includes improvements for running Tor in
10482 low-power and embedded environments, which should help performance in
10483 general. We've begun work on better modularity, and included preliminary
10484 changes on the directory authority side to accommodate a new bandwidth
10485 measurement system. We've also integrated more continuous-integration
10486 systems into our development process, and made corresponding changes to
10487 Tor's testing infrastructure. Finally, we've continued to refine
10488 our anti-denial-of-service code.
10490 Below are the changes since 0.3.4.7-rc. For a complete list of changes
10491 since 0.3.3.9, see the ReleaseNotes file.
10493 o Minor features (compatibility):
10494 - Tell OpenSSL to maintain backward compatibility with previous
10495 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10496 ciphers are disabled by default. Closes ticket 27344.
10498 o Minor features (continuous integration):
10499 - Log the compiler path and version during Appveyor builds.
10500 Implements ticket 27449.
10501 - Show config.log and test-suite.log after failed Appveyor builds.
10502 Also upload the zipped full logs as a build artifact. Implements
10505 o Minor bugfixes (compilation):
10506 - Silence a spurious compiler warning on the GetAdaptersAddresses
10507 function pointer cast. This issue is already fixed by 26481 in
10508 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10509 bugfix on 0.2.3.11-alpha.
10510 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10511 supported, and always fails. Some compilers warn about the
10512 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10515 o Minor bugfixes (continuous integration):
10516 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
10517 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
10518 Executables compiled for 64-bit Windows with this version of gcc
10519 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
10520 27460; bugfix on 0.3.4.1-alpha.
10521 - When a Travis build fails, and showing a log fails, keep trying to
10522 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10523 - When we use echo in Travis, don't pass a --flag as the first
10524 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10526 o Minor bugfixes (onion services):
10527 - Silence a spurious compiler warning in
10528 rend_client_send_introduction(). Fixes bug 27463; bugfix
10531 o Minor bugfixes (testing, chutney):
10532 - When running make test-network-all, use the mixed+hs-v2 network.
10533 (A previous fix to chutney removed v3 onion services from the
10534 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10535 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10536 - Before running make test-network-all, delete old logs and test
10537 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10540 Changes in version 0.3.4.7-rc - 2018-08-24
10541 Tor 0.3.4.7-rc fixes several small compilation, portability, and
10542 correctness issues in previous versions of Tor. This version is a
10543 release candidate: if no serious bugs are found, we expect that the
10544 stable 0.3.4 release will be (almost) the same as this release.
10546 o Minor features (bug workaround):
10547 - Compile correctly on systems that provide the C11 stdatomic.h
10548 header, but where C11 atomic functions don't actually compile.
10549 Closes ticket 26779; workaround for Debian issue 903709.
10551 o Minor features (continuous integration):
10552 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10553 - Enable macOS builds in our Travis CI configuration. Closes
10555 - Install libcap-dev and libseccomp2-dev so these optional
10556 dependencies get tested on Travis CI. Closes ticket 26560.
10557 - Only post Appveyor IRC notifications when the build fails.
10558 Implements ticket 27275.
10559 - Run asciidoc during Travis CI. Implements ticket 27087.
10560 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10562 o Minor features (continuous integration, rust):
10563 - Use cargo cache in our Travis CI configuration. Closes
10566 o Minor features (directory authorities):
10567 - Authorities no longer vote to make the subprotocol version
10568 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10569 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10571 o Minor features (geoip):
10572 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10573 Country database. Closes ticket 27089.
10575 o Minor bugfixes (compilation, windows):
10576 - Don't link or search for pthreads when building for Windows, even
10577 if we are using build environment (like mingw) that provides a
10578 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10580 o Minor bugfixes (continuous integration):
10581 - Improve Appveyor CI IRC logging. Generate correct branches and
10582 URLs for pull requests and tags. Use unambiguous short commits.
10583 Fixes bug 26979; bugfix on master.
10584 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10585 - Pass the module flags to distcheck configure, and log the flags
10586 before running configure. (Backported to 0.2.9 and later as a
10587 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10589 o Minor bugfixes (in-process restart):
10590 - Always call tor_free_all() when leaving tor_run_main(). When we
10591 did not, restarting tor in-process would cause an assertion
10592 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10594 o Minor bugfixes (linux seccomp2 sandbox):
10595 - Fix a bug in out sandboxing rules for the openat() syscall.
10596 Previously, no openat() call would be permitted, which would break
10597 filesystem operations on recent glibc versions. Fixes bug 25440;
10598 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10600 o Minor bugfixes (onion services):
10601 - Fix bug that causes services to not ever rotate their descriptors
10602 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10605 o Minor bugfixes (portability):
10606 - Fix compilation of the unit tests on GNU/Hurd, which does not
10607 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10610 o Minor bugfixes (rust):
10611 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10613 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10614 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10615 - Protover parsing was accepting the presence of whitespace in
10616 version strings, which the C implementation would choke on, e.g.
10617 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10618 - Protover parsing was ignoring a 2nd hyphen and everything after
10619 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10621 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10622 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10623 - cd to ${abs_top_builddir}/src/rust before running cargo in
10624 src/test/test_rust.sh. This makes the working directory consistent
10625 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10627 o Minor bugfixes (testing, bootstrap):
10628 - When calculating bootstrap progress, check exit policies and the
10629 exit flag. Previously, Tor would only check the exit flag, which
10630 caused race conditions in small and fast networks like chutney.
10631 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
10633 o Minor bugfixes (testing, openssl compatibility):
10634 - Our "tortls/cert_matches_key" unit test no longer relies on
10635 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10636 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10637 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10639 o Minor bugfixes (Windows, compilation):
10640 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10641 27185; bugfix on 0.2.2.2-alpha.
10644 Changes in version 0.3.4.6-rc - 2018-08-06
10645 Tor 0.3.4.6-rc fixes several small compilation, portability, and
10646 correctness issues in previous versions of Tor. This version is a
10647 release candidate: if no serious bugs are found, we expect that the
10648 stable 0.3.4 release will be (almost) the same as this release.
10650 o Major bugfixes (event scheduler):
10651 - When we enable a periodic event, schedule it in the event loop
10652 rather than running it immediately. Previously, we would re-run
10653 periodic events immediately in the middle of (for example)
10654 changing our options, with unpredictable effects. Fixes bug 27003;
10655 bugfix on 0.3.4.1-alpha.
10657 o Minor features (compilation):
10658 - When building Tor, prefer to use Python 3 over Python 2, and more
10659 recent (contemplated) versions over older ones. Closes
10661 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10662 tell the compiler not to include the system malloc implementation.
10663 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10664 - Don't try to use a pragma to temporarily disable the
10665 -Wunused-const-variable warning if the compiler doesn't support
10666 it. Fixes bug 26785; bugfix on 0.3.2.11.
10668 o Minor bugfixes (continuous integration):
10669 - Skip a pair of unreliable key generation tests on Windows, until
10670 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10671 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10673 o Minor features (controller):
10674 - The control port now exposes the list of HTTPTunnelPorts and
10675 ExtOrPorts via GETINFO net/listeners/httptunnel and
10676 net/listeners/extor respectively. Closes ticket 26647.
10678 o Minor bugfixes (directory authority):
10679 - When voting for recommended versions, make sure that all of the
10680 versions are well-formed and parsable. Fixes bug 26485; bugfix
10683 o Minor features (geoip):
10684 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10685 Country database. Closes ticket 26674.
10687 o Minor features (Rust, portability):
10688 - Rust cross-compilation is now supported. Closes ticket 25895.
10690 o Minor bugfixes (compilation):
10691 - Update build system so that tor builds again with --disable-unittests
10692 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
10693 - Fix a compilation warning on some versions of GCC when building
10694 code that calls routerinfo_get_my_routerinfo() twice, assuming
10695 that the second call will succeed if the first one did. Fixes bug
10696 26269; bugfix on 0.2.8.2-alpha.
10698 o Minor bugfixes (controller):
10699 - Report the port correctly when a port is configured to bind to
10700 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10701 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
10702 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
10703 on 0.3.3.1-alpha. Patch by "akwizgran".
10705 o Minor bugfixes (correctness, flow control):
10706 - Upon receiving a stream-level SENDME cell, verify that our window
10707 has not grown too large. Fixes bug 26214; bugfix on svn
10710 o Minor bugfixes (memory, correctness):
10711 - Fix a number of small memory leaks identified by coverity. Fixes
10712 bug 26467; bugfix on numerous Tor versions.
10714 o Minor bugfixes (logging):
10715 - Improve the log message when connection initiators fail to
10716 authenticate direct connections to relays. Fixes bug 26927; bugfix
10719 o Minor bugfixes (portability):
10720 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
10721 26994; bugfix on 0.3.4.1-alpha.
10722 - Work around two different bugs in the OS X 10.10 and later SDKs
10723 that would prevent us from successfully targeting earlier versions
10724 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10726 o Minor bugfixes (single onion services, Tor2web):
10727 - Log a protocol warning when single onion services or Tor2web
10728 clients fail to authenticate direct connections to relays. Fixes
10729 bug 26924; bugfix on 0.2.9.1-alpha.
10731 o Minor bugfixes (testing):
10732 - Disable core dumps in test_bt.sh, to avoid failures in "make
10733 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10735 o Minor bugfixes (testing, compatibility):
10736 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
10737 only to pass strings (rather than "bytes" objects) to the Python
10738 subprocess module. Python 3 on Windows seems to require this.
10739 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
10740 0.3.1.1-alpha (for hs_ntor_ref.py).
10742 o Minor bugfixes (v3 onion services):
10743 - Stop sending ed25519 link specifiers in v3 onion service introduce
10744 cells and descriptors, when the rendezvous or introduction point
10745 doesn't support ed25519 link authentication. Fixes bug 26627;
10746 bugfix on 0.3.2.4-alpha.
10749 Changes in version 0.3.4.5-rc - 2018-07-13
10750 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
10751 bridge relays should upgrade.
10753 o Directory authority changes:
10754 - The "Bifroest" bridge authority has been retired; the new bridge
10755 authority is "Serge", and it is operated by George from the
10756 TorBSD project. Closes ticket 26771.
10759 Changes in version 0.3.3.9 - 2018-07-13
10760 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
10761 bridge relays should upgrade.
10763 o Directory authority changes:
10764 - The "Bifroest" bridge authority has been retired; the new bridge
10765 authority is "Serge", and it is operated by George from the
10766 TorBSD project. Closes ticket 26771.
10769 Changes in version 0.3.2.11 - 2018-07-13
10770 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
10771 bridge relays should upgrade. We also take this opportunity to backport
10774 o Directory authority changes:
10775 - The "Bifroest" bridge authority has been retired; the new bridge
10776 authority is "Serge", and it is operated by George from the
10777 TorBSD project. Closes ticket 26771.
10779 o Directory authority changes (backport from 0.3.3.7):
10780 - Add an IPv6 address for the "dannenberg" directory authority.
10781 Closes ticket 26343.
10783 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10784 - When directory authorities read a zero-byte bandwidth file, they
10785 would previously log a warning with the contents of an
10786 uninitialised buffer. They now log a warning about the empty file
10787 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10789 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10790 - Correctly detect when onion services get disabled after HUP. Fixes
10791 bug 25761; bugfix on 0.3.2.1.
10793 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10794 - Explicitly permit the poll() system call when the Linux
10795 seccomp2-based sandbox is enabled: apparently, some versions of
10796 libc use poll() when calling getpwnam(). Closes ticket 25313.
10798 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
10799 - Update the Travis CI configuration to use the stable Rust channel,
10800 now that we have decided to require that. Closes ticket 25714.
10802 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10803 - Our .travis.yml configuration now includes support for testing the
10804 results of "make distcheck". (It's not uncommon for "make check"
10805 to pass but "make distcheck" to fail.) Closes ticket 25814.
10806 - Our Travis CI configuration now integrates with the Coveralls
10807 coverage analysis tool. Closes ticket 25818.
10809 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10810 - Add several checks to detect whether Tor relays are uploading
10811 their descriptors without specifying why they regenerated them.
10812 Diagnostic for ticket 25686.
10814 o Minor features (compilation, backport from 0.3.4.4-rc):
10815 - When building Tor, prefer to use Python 3 over Python 2, and more
10816 recent (contemplated) versions over older ones. Closes
10819 o Minor features (geoip):
10820 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10821 Country database. Closes ticket 26674.
10823 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10824 - Upon receiving a malformed connected cell, stop processing the
10825 cell immediately. Previously we would mark the connection for
10826 close, but continue processing the cell as if the connection were
10827 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10829 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10830 - Allow the nanosleep() system call, which glibc uses to implement
10831 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10833 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10834 - When running the hs_ntor_ref.py test, make sure only to pass
10835 strings (rather than "bytes" objects) to the Python subprocess
10836 module. Python 3 on Windows seems to require this. Fixes bug
10837 26535; bugfix on 0.3.1.1-alpha.
10838 - When running the ntor_ref.py test, make sure only to pass strings
10839 (rather than "bytes" objects) to the Python subprocess module.
10840 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10843 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10844 - Work around a change in OpenSSL 1.1.1 where return values that
10845 would previously indicate "no password" now indicate an empty
10846 password. Without this workaround, Tor instances running with
10847 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10848 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10850 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
10851 - Document that the PerConnBW{Rate,Burst} options will fall back to
10852 their corresponding consensus parameters only if those parameters
10853 are set. Previously we had claimed that these values would always
10854 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10856 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10857 - Fix a compilation warning on some versions of GCC when building
10858 code that calls routerinfo_get_my_routerinfo() twice, assuming
10859 that the second call will succeed if the first one did. Fixes bug
10860 26269; bugfix on 0.2.8.2-alpha.
10862 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10863 - Don't consider Tor running as a client if the ControlPort is open,
10864 but no actual client ports are open. Fixes bug 26062; bugfix
10867 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10868 - Prevent a possible out-of-bounds smartlist read in
10869 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10871 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10872 - Fix a very unlikely (impossible, we believe) null pointer
10873 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10874 Coverity; this is CID 1430932.
10876 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10877 - Fix a memory leak when a v3 onion service is configured and gets a
10878 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10879 - When parsing the descriptor signature, look for the token plus an
10880 extra white-space at the end. This is more correct but also will
10881 allow us to support new fields that might start with "signature".
10882 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10884 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10885 - Relays now correctly block attempts to re-extend to the previous
10886 relay by Ed25519 identity. Previously they would warn in this
10887 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10890 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10891 - Avoid a crash when running with DirPort set but ORPort turned off.
10892 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10894 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10895 - Silence unused-const-variable warnings in zstd.h with some GCC
10896 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10898 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
10899 - Avoid intermittent test failures due to a test that had relied on
10900 onion service introduction point creation finishing within 5
10901 seconds of real clock time. Fixes bug 25450; bugfix
10904 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
10905 - Fix a C99 compliance issue in our configuration script that caused
10906 compilation issues when compiling Tor with certain versions of
10907 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10909 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10910 - Fix a number of small memory leaks identified by coverity. Fixes
10911 bug 26467; bugfix on numerous Tor versions.
10913 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10914 - Move the list of default directory authorities to its own file.
10915 Closes ticket 24854. Patch by "beastr0".
10918 Changes in version 0.2.9.16 - 2018-07-13
10919 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
10920 bridge relays should upgrade. We also take this opportunity to backport
10923 o Directory authority changes:
10924 - The "Bifroest" bridge authority has been retired; the new bridge
10925 authority is "Serge", and it is operated by George from the
10926 TorBSD project. Closes ticket 26771.
10928 o Directory authority changes (backport from 0.3.3.7):
10929 - Add an IPv6 address for the "dannenberg" directory authority.
10930 Closes ticket 26343.
10932 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10933 - When directory authorities read a zero-byte bandwidth file, they
10934 would previously log a warning with the contents of an
10935 uninitialised buffer. They now log a warning about the empty file
10936 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10938 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10939 - Explicitly permit the poll() system call when the Linux
10940 seccomp2-based sandbox is enabled: apparently, some versions of
10941 libc use poll() when calling getpwnam(). Closes ticket 25313.
10943 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10944 - Our .travis.yml configuration now includes support for testing the
10945 results of "make distcheck". (It's not uncommon for "make check"
10946 to pass but "make distcheck" to fail.) Closes ticket 25814.
10947 - Our Travis CI configuration now integrates with the Coveralls
10948 coverage analysis tool. Closes ticket 25818.
10950 o Minor features (compilation, backport from 0.3.4.4-rc):
10951 - When building Tor, prefer to use Python 3 over Python 2, and more
10952 recent (contemplated) versions over older ones. Closes
10955 o Minor features (geoip):
10956 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10957 Country database. Closes ticket 26674.
10959 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10960 - Upon receiving a malformed connected cell, stop processing the
10961 cell immediately. Previously we would mark the connection for
10962 close, but continue processing the cell as if the connection were
10963 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10965 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10966 - Allow the nanosleep() system call, which glibc uses to implement
10967 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10969 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10970 - When running the ntor_ref.py test, make sure only to pass strings
10971 (rather than "bytes" objects) to the Python subprocess module.
10972 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10975 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10976 - Work around a change in OpenSSL 1.1.1 where return values that
10977 would previously indicate "no password" now indicate an empty
10978 password. Without this workaround, Tor instances running with
10979 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10980 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10982 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10983 - Fix a compilation warning on some versions of GCC when building
10984 code that calls routerinfo_get_my_routerinfo() twice, assuming
10985 that the second call will succeed if the first one did. Fixes bug
10986 26269; bugfix on 0.2.8.2-alpha.
10988 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10989 - Don't consider Tor running as a client if the ControlPort is open,
10990 but no actual client ports are open. Fixes bug 26062; bugfix
10993 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10994 - Prevent a possible out-of-bounds smartlist read in
10995 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10997 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10998 - Fix a very unlikely (impossible, we believe) null pointer
10999 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11000 Coverity; this is CID 1430932.
11002 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
11003 - Fix a number of small memory leaks identified by coverity. Fixes
11004 bug 26467; bugfix on numerous Tor versions.
11006 o Code simplification and refactoring (backport from 0.3.3.5-rc):
11007 - Move the list of default directory authorities to its own file.
11008 Closes ticket 24854. Patch by "beastr0".
11011 Changes in version 0.3.4.4-rc - 2018-07-09
11012 Tor 0.3.4.4-rc fixes several small compilation, portability, and
11013 correctness issues in previous versions of Tor. This version is a
11014 release candidate: if no serious bugs are found, we expect that the
11015 stable 0.3.4 release will be (almost) the same as this release.
11017 o Minor features (compilation):
11018 - When building Tor, prefer to use Python 3 over Python 2, and more
11019 recent (contemplated) versions over older ones. Closes
11022 o Minor features (geoip):
11023 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
11024 Country database. Closes ticket 26674.
11026 o Minor features (Rust, portability):
11027 - Rust cross-compilation is now supported. Closes ticket 25895.
11029 o Minor bugfixes (compilation):
11030 - Fix a compilation warning on some versions of GCC when building
11031 code that calls routerinfo_get_my_routerinfo() twice, assuming
11032 that the second call will succeed if the first one did. Fixes bug
11033 26269; bugfix on 0.2.8.2-alpha.
11035 o Minor bugfixes (control port):
11036 - Report the port correctly when a port is configured to bind to
11037 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
11038 - Handle the HSADDRESS= argument to the HSPOST command properly.
11039 (Previously, this argument was misparsed and thus ignored.) Fixes
11040 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
11042 o Minor bugfixes (correctness, flow control):
11043 - Upon receiving a stream-level SENDME cell, verify that our window
11044 has not grown too large. Fixes bug 26214; bugfix on svn
11047 o Minor bugfixes (memory, correctness):
11048 - Fix a number of small memory leaks identified by coverity. Fixes
11049 bug 26467; bugfix on numerous Tor versions.
11051 o Minor bugfixes (testing, compatibility):
11052 - When running the hs_ntor_ref.py test, make sure only to pass
11053 strings (rather than "bytes" objects) to the Python subprocess
11054 module. Python 3 on Windows seems to require this. Fixes bug
11055 26535; bugfix on 0.3.1.1-alpha.
11056 - When running the ntor_ref.py test, make sure only to pass strings
11057 (rather than "bytes" objects) to the Python subprocess module.
11058 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
11062 Changes in version 0.3.3.8 - 2018-07-09
11063 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
11064 fixes for a memory leak affecting directory authorities.
11066 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
11067 - Stop leaking memory on directory authorities when planning to
11068 vote. This bug was crashing authorities by exhausting their
11069 memory. Fixes bug 26435; bugfix on 0.3.3.6.
11071 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
11072 - Make sure that failing tests in Rust will actually cause the build
11073 to fail: previously, they were ignored. Fixes bug 26258; bugfix
11076 o Minor features (compilation, backport from 0.3.4.4-rc):
11077 - When building Tor, prefer to use Python 3 over Python 2, and more
11078 recent (contemplated) versions over older ones. Closes
11081 o Minor features (geoip):
11082 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
11083 Country database. Closes ticket 26674.
11085 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
11086 - Add several checks to detect whether Tor relays are uploading
11087 their descriptors without specifying why they regenerated them.
11088 Diagnostic for ticket 25686.
11090 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
11091 - Don't count path selection failures as circuit build failures.
11092 This change should eliminate cases where Tor blames its guard or
11093 the network for situations like insufficient microdescriptors
11094 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11097 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
11098 - Fix a compilation warning on some versions of GCC when building
11099 code that calls routerinfo_get_my_routerinfo() twice, assuming
11100 that the second call will succeed if the first one did. Fixes bug
11101 26269; bugfix on 0.2.8.2-alpha.
11103 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
11104 - Handle the HSADDRESS= argument to the HSPOST command properly.
11105 (Previously, this argument was misparsed and thus ignored.) Fixes
11106 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
11108 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
11109 - Fix a number of small memory leaks identified by coverity. Fixes
11110 bug 26467; bugfix on numerous Tor versions.
11112 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
11113 - Relays now correctly block attempts to re-extend to the previous
11114 relay by Ed25519 identity. Previously they would warn in this
11115 case, but not actually reject the attempt. Fixes bug 26158; bugfix
11118 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
11119 - When shutting down, Tor now clears all the flags in the control.c
11120 module. This should prevent a bug where authentication cookies are
11121 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11123 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
11124 - When running the hs_ntor_ref.py test, make sure only to pass
11125 strings (rather than "bytes" objects) to the Python subprocess
11126 module. Python 3 on Windows seems to require this. Fixes bug
11127 26535; bugfix on 0.3.1.1-alpha.
11128 - When running the ntor_ref.py test, make sure only to pass strings
11129 (rather than "bytes" objects) to the Python subprocess module.
11130 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
11134 Changes in version 0.3.4.3-alpha - 2018-06-26
11135 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
11136 one that was causing stability issues on directory authorities.
11138 o Major bugfixes (directory authority):
11139 - Stop leaking memory on directory authorities when planning to
11140 vote. This bug was crashing authorities by exhausting their
11141 memory. Fixes bug 26435; bugfix on 0.3.3.6.
11143 o Major bugfixes (rust, testing):
11144 - Make sure that failing tests in Rust will actually cause the build
11145 to fail: previously, they were ignored. Fixes bug 26258; bugfix
11148 o Minor feature (directory authorities):
11149 - Stop warning about incomplete bw lines before the first complete
11150 bw line has been found, so that additional header lines can be
11151 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
11153 o Minor features (relay, diagnostic):
11154 - Add several checks to detect whether Tor relays are uploading
11155 their descriptors without specifying why they regenerated them.
11156 Diagnostic for ticket 25686.
11158 o Minor features (unit tests):
11159 - Test complete bandwidth measurements files, and test that
11160 incomplete bandwidth lines only give warnings when the end of the
11161 header has not been detected. Fixes bug 25947; bugfix
11164 o Minor bugfixes (compilation):
11165 - Refrain from compiling unit testing related object files when
11166 --disable-unittests is set to configure script. Fixes bug 24891;
11167 bugfix on 0.2.5.1-alpha.
11168 - When linking the libtor_testing.a library, only include the
11169 dirauth object files once. Previously, they were getting added
11170 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
11171 - The --enable-fatal-warnings flag now affects Rust code as well.
11172 Closes ticket 26245.
11174 o Minor bugfixes (onion services):
11175 - Recompute some consensus information after detecting a clock jump,
11176 or after transitioning from a non-live consensus to a live
11177 consensus. We do this to avoid having an outdated state, and
11178 miscalculating the index for next-generation onion services. Fixes
11179 bug 24977; bugfix on 0.3.2.1-alpha.
11181 o Minor bugfixes (relay):
11182 - Relays now correctly block attempts to re-extend to the previous
11183 relay by Ed25519 identity. Previously they would warn in this
11184 case, but not actually reject the attempt. Fixes bug 26158; bugfix
11187 o Minor bugfixes (testing):
11188 - Fix compilation of the doctests in the Rust crypto crate. Fixes
11189 bug 26415; bugfix on 0.3.4.1-alpha.
11190 - Instead of trying to read the geoip configuration files from
11191 within the unit tests, instead create our own ersatz files with
11192 just enough geoip data in the format we expect. Trying to read
11193 from the source directory created problems on Windows with mingw,
11194 where the build system's paths are not the same as the platform's
11195 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
11196 - Refrain from trying to get an item from an empty smartlist in
11197 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
11198 to catch improper smartlist usage. Furthermore, enable
11199 DEBUG_SMARTLIST globally when build is configured with fragile
11200 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
11203 Changes in version 0.3.3.7 - 2018-06-12
11204 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
11205 fixes for bugs affecting compatibility and stability.
11207 o Directory authority changes:
11208 - Add an IPv6 address for the "dannenberg" directory authority.
11209 Closes ticket 26343.
11211 o Minor features (geoip):
11212 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
11213 Country database. Closes ticket 26351.
11215 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
11216 - Work around a change in OpenSSL 1.1.1 where return values that
11217 would previously indicate "no password" now indicate an empty
11218 password. Without this workaround, Tor instances running with
11219 OpenSSL 1.1.1 would accept descriptors that other Tor instances
11220 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
11222 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
11223 - Silence unused-const-variable warnings in zstd.h with some GCC
11224 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
11226 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
11227 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
11228 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
11229 miscounting the total number of circuits for these field values.)
11230 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
11232 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
11233 - Prevent a possible out-of-bounds smartlist read in
11234 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
11236 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
11237 - Only select relays when they have the descriptors we prefer to use
11238 for them. This change fixes a bug where we could select a relay
11239 because it had _some_ descriptor, but reject it later with a
11240 nonfatal assertion error because it didn't have the exact one we
11241 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11244 Changes in version 0.3.4.2-alpha - 2018-06-12
11245 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
11246 release, and forward-ports an authority-only security fix from 0.3.3.6.
11248 o Directory authority changes:
11249 - Add an IPv6 address for the "dannenberg" directory authority.
11250 Closes ticket 26343.
11252 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
11253 - Fix a bug that could have allowed an attacker to force a directory
11254 authority to use up all its RAM by passing it a maliciously
11255 crafted protocol versions string. Fixes bug 25517; bugfix on
11256 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
11258 o Minor features (continuous integration):
11259 - Add the necessary configuration files for continuous integration
11260 testing on Windows, via the Appveyor platform. Closes ticket
11261 25549. Patches from Marcin Cieślak and Isis Lovecruft.
11263 o Minor features (geoip):
11264 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
11265 Country database. Closes ticket 26351.
11267 o Minor bugfixes (compatibility, openssl):
11268 - Work around a change in OpenSSL 1.1.1 where return values that
11269 would previously indicate "no password" now indicate an empty
11270 password. Without this workaround, Tor instances running with
11271 OpenSSL 1.1.1 would accept descriptors that other Tor instances
11272 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
11274 o Minor bugfixes (compilation):
11275 - Silence unused-const-variable warnings in zstd.h with some GCC
11276 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
11277 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
11278 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
11279 - Avoid a compiler warning when casting the return value of
11280 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
11281 26283; bugfix on 0.2.4.10-alpha.
11283 o Minor bugfixes (control port):
11284 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
11285 CIRC_BW events. Previously, such cells were counted entirely in
11286 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
11289 o Minor bugfixes (controller):
11290 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
11291 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
11292 miscounting the total number of circuits for these field values.)
11293 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
11295 o Minor bugfixes (hardening):
11296 - Prevent a possible out-of-bounds smartlist read in
11297 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
11299 o Minor bugfixes (onion services):
11300 - Fix a bug that blocked the creation of ephemeral v3 onion
11301 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
11303 o Minor bugfixes (test coverage tools):
11304 - Update our "cov-diff" script to handle output from the latest
11305 version of gcov, and to remove extraneous timestamp information
11306 from its output. Fixes bugs 26101 and 26102; bugfix
11310 Changes in version 0.3.3.6 - 2018-05-22
11311 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
11312 backports several important fixes from the 0.3.4.1-alpha.
11314 The Tor 0.3.3 series includes controller support and other
11315 improvements for v3 onion services, official support for embedding Tor
11316 within other applications, and our first non-trivial module written in
11317 the Rust programming language. (Rust is still not enabled by default
11318 when building Tor.) And as usual, there are numerous other smaller
11319 bugfixes, features, and improvements.
11321 Below are the changes since 0.3.3.5-rc. For a list of all changes
11322 since 0.3.2.10, see the ReleaseNotes file.
11324 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
11325 - When directory authorities read a zero-byte bandwidth file, they
11326 would previously log a warning with the contents of an
11327 uninitialised buffer. They now log a warning about the empty file
11328 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11330 o Major bugfixes (security, directory authority, denial-of-service):
11331 - Fix a bug that could have allowed an attacker to force a directory
11332 authority to use up all its RAM by passing it a maliciously
11333 crafted protocol versions string. Fixes bug 25517; bugfix on
11334 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
11336 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
11337 - Avoid a rare assertion failure in the circuit build timeout code
11338 if we fail to allow any circuits to actually complete. Fixes bug
11339 25733; bugfix on 0.2.2.2-alpha.
11341 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
11342 - Avoid a crash when testing router reachability on a router that
11343 could have an ed25519 ID, but which does not. Fixes bug 25415;
11344 bugfix on 0.3.3.2-alpha.
11346 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
11347 - Correctly detect when onion services get disabled after HUP. Fixes
11348 bug 25761; bugfix on 0.3.2.1.
11350 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
11351 - Impose a limit on circuit cell queue size. The limit can be
11352 controlled by a consensus parameter. Fixes bug 25226; bugfix
11355 o Minor features (compatibility, backport from 0.3.4.1-alpha):
11356 - Avoid some compilation warnings with recent versions of LibreSSL.
11357 Closes ticket 26006.
11359 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
11360 - Our .travis.yml configuration now includes support for testing the
11361 results of "make distcheck". (It's not uncommon for "make check"
11362 to pass but "make distcheck" to fail.) Closes ticket 25814.
11363 - Our Travis CI configuration now integrates with the Coveralls
11364 coverage analysis tool. Closes ticket 25818.
11366 o Minor features (geoip):
11367 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11368 database. Closes ticket 26104.
11370 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
11371 - Don't consider Tor running as a client if the ControlPort is open,
11372 but no actual client ports are open. Fixes bug 26062; bugfix
11375 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
11376 - Upon receiving a malformed connected cell, stop processing the
11377 cell immediately. Previously we would mark the connection for
11378 close, but continue processing the cell as if the connection were
11379 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
11381 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
11382 - Stop saying in the manual that clients cache ipv4 dns answers from
11383 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11384 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11385 we forgot to say so in the man page. Fixes bug 26052; bugfix
11388 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
11389 - Allow the nanosleep() system call, which glibc uses to implement
11390 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11392 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
11393 - Fix a memory leak when a v3 onion service is configured and gets a
11394 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11395 - When parsing the descriptor signature, look for the token plus an
11396 extra white-space at the end. This is more correct but also will
11397 allow us to support new fields that might start with "signature".
11398 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11400 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
11401 - Avoid a crash when running with DirPort set but ORPort turned off.
11402 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11404 o Documentation (backport from 0.3.4.1-alpha):
11405 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11406 ticket 25857. Patch from "CTassisF".
11409 Changes in version 0.3.4.1-alpha - 2018-05-17
11410 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
11411 includes refactoring to begin reducing Tor's binary size and idle CPU
11412 usage on mobile, along with prep work for new bandwidth scanners,
11413 improvements to the experimental "vanguards" feature, and numerous
11414 other small features and bugfixes.
11416 o New system requirements:
11417 - Tor no longer tries to support old operating systems without
11418 mmap() or some local equivalent. Apparently, compilation on such
11419 systems has been broken for some time, without anybody noticing or
11420 complaining. Closes ticket 25398.
11422 o Major feature (directory authority, modularization):
11423 - The directory authority subsystem has been modularized. The code
11424 is now located in src/or/dirauth/, and is compiled in by default.
11425 To disable the module, the configure option
11426 --disable-module-dirauth has been added. This module may be
11427 disabled by default in some future release. Closes ticket 25610.
11429 o Major features (main loop, CPU usage):
11430 - When Tor is disabled (via DisableNetwork or via hibernation), it
11431 no longer needs to run any per-second events. This change should
11432 make it easier for mobile applications to disable Tor while the
11433 device is sleeping, or Tor is not running. Closes ticket 26063.
11434 - Tor no longer enables all of its periodic events by default.
11435 Previously, Tor would enable all possible main loop events,
11436 regardless of whether it needed them. Furthermore, many of these
11437 events are now disabled with Tor is hibernating or DisableNetwork
11438 is set. This is a big step towards reducing client CPU usage by
11439 reducing the amount of wake-ups the daemon does. Closes ticket
11441 - The bandwidth-limitation logic has been refactored so that
11442 bandwidth calculations are performed on-demand, rather than every
11443 TokenBucketRefillInterval milliseconds. This change should improve
11444 the granularity of our bandwidth calculations, and limit the
11445 number of times that the Tor process needs to wake up when it is
11446 idle. Closes ticket 25373.
11447 - Move responsibility for many operations from a once-per-second
11448 callback to a callback that is only scheduled as needed. Moving
11449 this functionality has allowed us to disable the callback when
11450 Tor's network is disabled. Once enough items are removed from our
11451 once-per-second callback, we can eliminate it entirely to conserve
11452 CPU when idle. The functionality removed includes: closing
11453 connections, circuits, and channels (ticket 25932); consensus
11454 voting (25937); flushing log callbacks (25951); honoring delayed
11455 SIGNEWNYM requests (25949); rescanning the consensus cache
11456 (25931); saving the state file to disk (25948); warning relay
11457 operators about unreachable ports (25952); and keeping track of
11458 Tor's uptime (26009).
11460 o Major bugfixes (directory authorities, security):
11461 - When directory authorities read a zero-byte bandwidth file, they
11462 would previously log a warning with the contents of an
11463 uninitialised buffer. They now log a warning about the empty file
11464 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11466 o Major bugfixes (crash):
11467 - Avoid a rare assertion failure in the circuit build timeout code
11468 if we fail to allow any circuits to actually complete. Fixes bug
11469 25733; bugfix on 0.2.2.2-alpha.
11471 o Major bugfixes (directory authority):
11472 - Avoid a crash when testing router reachability on a router that
11473 could have an ed25519 ID, but which does not. Fixes bug 25415;
11474 bugfix on 0.3.3.2-alpha.
11476 o Major bugfixes (onion service):
11477 - Correctly detect when onion services get disabled after HUP. Fixes
11478 bug 25761; bugfix on 0.3.2.1.
11480 o Major bugfixes (protover, voting):
11481 - Revise Rust implementation of protover to use a more memory-
11482 efficient voting algorithm and corresponding data structures, thus
11483 avoiding a potential (but small impact) DoS attack where specially
11484 crafted protocol strings would expand to several potential
11485 megabytes in memory. In the process, several portions of code were
11486 revised to be methods on new, custom types, rather than functions
11487 taking interchangeable types, thus increasing type safety of the
11488 module. Custom error types and handling were added as well, in
11489 order to facilitate better error dismissal/handling in outside
11490 crates and avoid mistakenly passing an internal error string to C
11491 over the FFI boundary. Many tests were added, and some previous
11492 differences between the C and Rust implementations have been
11493 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11495 o Major bugfixes (relay, denial of service):
11496 - Impose a limit on circuit cell queue size. The limit can be
11497 controlled by a consensus parameter. Fixes bug 25226; bugfix
11500 o Minor features (accounting):
11501 - When Tor becomes dormant, it now uses a scheduled event to wake up
11502 at the right time. Previously, we would use the per-second timer
11503 to check whether to wake up, but we no longer have any per-second
11504 timers enabled when the network is disabled. Closes ticket 26064.
11506 o Minor features (code quality):
11507 - Add optional spell-checking for the Tor codebase, using the
11508 "misspell" program. To use this feature, run "make check-typos".
11509 Closes ticket 25024.
11511 o Minor features (compatibility):
11512 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
11513 the no-deprecated option, and builds correctly with them. Closes
11514 tickets 19429, 19981, and 25353.
11515 - Avoid some compilation warnings with recent versions of LibreSSL.
11516 Closes ticket 26006.
11518 o Minor features (compression, zstd):
11519 - When running with zstd, Tor now considers using advanced functions
11520 that the zstd maintainers have labeled as potentially unstable. To
11521 prevent breakage, Tor will only use this functionality when the
11522 runtime version of the zstd library matches the version with which
11523 Tor was compiled. Closes ticket 25162.
11525 o Minor features (configuration):
11526 - The "DownloadSchedule" options have been renamed to end with
11527 "DownloadInitialDelay". The old names are still allowed, but will
11528 produce a warning. Comma-separated lists are still permitted for
11529 these options, but all values after the first are ignored (as they
11530 have been since 0.2.9). Closes ticket 23354.
11532 o Minor features (continuous integration):
11533 - Our .travis.yml configuration now includes support for testing the
11534 results of "make distcheck". (It's not uncommon for "make check"
11535 to pass but "make distcheck" to fail.) Closes ticket 25814.
11536 - Our Travis CI configuration now integrates with the Coveralls
11537 coverage analysis tool. Closes ticket 25818.
11539 o Minor features (control port):
11540 - Introduce GETINFO "current-time/{local,utc}" to return the local
11541 and UTC times respectively in ISO format. This helps a controller
11542 like Tor Browser detect a time-related error. Closes ticket 25511.
11543 Patch by Neel Chauhan.
11544 - Introduce new fields to the CIRC_BW event. There are two new
11545 fields in each of the read and written directions. The DELIVERED
11546 fields report the total valid data on the circuit, as measured by
11547 the payload sizes of verified and error-checked relay command
11548 cells. The OVERHEAD fields report the total unused bytes in each
11549 of these cells. Closes ticket 25903.
11551 o Minor features (directory authority):
11552 - Directory authorities now open their key-pinning files as O_SYNC,
11553 to limit their chances of accidentally writing partial lines.
11554 Closes ticket 23909.
11556 o Minor features (directory authority, forward compatibility):
11557 - Make the lines of the measured bandwidth file able to contain
11558 their entries in any order. Previously, the node_id entry needed
11559 to come first. Closes ticket 26004.
11561 o Minor features (entry guards):
11562 - Introduce a new torrc option NumPrimaryGuards for controlling the
11563 number of primary guards. Closes ticket 25843.
11565 o Minor features (geoip):
11566 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11567 database. Closes ticket 26104.
11569 o Minor features (performance):
11570 - Avoid a needless call to malloc() when processing an incoming
11571 relay cell. Closes ticket 24914.
11572 - Make our timing-wheel code run a tiny bit faster on 32-bit
11573 platforms, by preferring 32-bit math to 64-bit. Closes
11575 - Avoid a needless malloc()/free() pair every time we handle an ntor
11576 handshake. Closes ticket 25150.
11578 o Minor features (testing):
11579 - Add a unit test for voting_schedule_get_start_of_next_interval().
11580 Closes ticket 26014, and helps make unit test coverage
11581 more deterministic.
11582 - A new unittests module specifically for testing the functions in
11583 the (new-ish) bridges.c module has been created with new
11584 unittests, raising the code coverage percentages. Closes 25425.
11585 - We now have improved testing for addressmap_get_virtual_address()
11586 function. This should improve our test coverage, and make our test
11587 coverage more deterministic. Closes ticket 25993.
11589 o Minor features (timekeeping, circuit scheduling):
11590 - When keeping track of how busy each circuit have been recently on
11591 a given connection, use coarse-grained monotonic timers rather
11592 than gettimeofday(). This change should marginally increase
11593 accuracy and performance. Implements part of ticket 25927.
11595 o Minor bugfixes (bandwidth management):
11596 - Consider ourselves "low on write bandwidth" if we have exhausted
11597 our write bandwidth some time in the last second. This was the
11598 documented behavior before, but the actual behavior was to change
11599 this value every TokenBucketRefillInterval. Fixes bug 25828;
11600 bugfix on 0.2.3.5-alpha.
11602 o Minor bugfixes (C correctness):
11603 - Add a missing lock acquisition in the shutdown code of the control
11604 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
11605 Coverity; this is CID 1433643.
11607 o Minor bugfixes (circuit path selection):
11608 - Don't count path selection failures as circuit build failures.
11609 This change should eliminate cases where Tor blames its guard or
11610 the network for situations like insufficient microdescriptors
11611 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11614 o Minor bugfixes (client):
11615 - Don't consider Tor running as a client if the ControlPort is open,
11616 but no actual client ports are open. Fixes bug 26062; bugfix
11619 o Minor bugfixes (code style):
11620 - Fixed multiple includes of transports.h in src/or/connection.c
11621 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
11622 - Remove the unused variable n_possible from the function
11623 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
11625 o Minor bugfixes (control interface):
11626 - Respond with more human-readable error messages to GETINFO exit-
11627 policy/* requests. Also, let controller know if an error is
11628 transient (response code 551) or not (response code 552). Fixes
11629 bug 25852; bugfix on 0.2.8.1-alpha.
11631 o Minor bugfixes (controller):
11632 - Make CIRC_BW event reflect the total of all data sent on a
11633 circuit, including padding and dropped cells. Also fix a mis-
11634 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
11635 bugfix on 0.2.5.2-alpha.
11637 o Minor bugfixes (correctness, client):
11638 - Upon receiving a malformed connected cell, stop processing the cell
11639 immediately. Previously we would mark the connection for close, but
11640 continue processing the cell as if the connection were open. Fixes bug
11641 26072; bugfix on 0.2.4.7-alpha.
11643 o Minor bugfixes (directory client):
11644 - When unverified-consensus is verified, rename it to cached-
11645 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
11646 - Fixed launching a certificate fetch always during the scheduled
11647 periodic consensus fetch by fetching only in those cases when
11648 consensus are waiting for certs. Fixes bug 24740; bugfix
11651 o Minor bugfixes (documentation):
11652 - Stop saying in the manual that clients cache ipv4 dns answers from
11653 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11654 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11655 we forgot to say so in the man page. Fixes bug 26052; bugfix
11658 o Minor bugfixes (error reporting):
11659 - Improve tolerance for directory authorities with skewed clocks.
11660 Previously, an authority with a clock more than 60 seconds ahead
11661 could cause a client with a correct clock to warn that the
11662 client's clock was behind. Now the clocks of a majority of
11663 directory authorities have to be ahead of the client before this
11664 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
11666 o Minor bugfixes (Linux seccomp2 sandbox):
11667 - Allow the nanosleep() system call, which glibc uses to implement
11668 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11670 o Minor bugfixes (onion service):
11671 - Fix a memory leak when a v3 onion service is configured and gets a
11672 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11673 - When parsing the descriptor signature, look for the token plus an
11674 extra white-space at the end. This is more correct but also will
11675 allow us to support new fields that might start with "signature".
11676 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11678 o Minor bugfixes (path selection):
11679 - Only select relays when they have the descriptors we prefer to use
11680 for them. This change fixes a bug where we could select a relay
11681 because it had _some_ descriptor, but reject it later with a
11682 nonfatal assertion error because it didn't have the exact one we
11683 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11685 o Minor bugfixes (portability):
11686 - Do not align mmap length, as it is not required by POSIX, and the
11687 getpagesize function is deprecated. Fixes bug 25399; bugfix
11690 o Minor bugfixes (portability, FreeBSD):
11691 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
11692 does not stringify on FreeBSD, so we switch to tor_asprintf().
11693 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
11695 o Minor bugfixes (relay statistics):
11696 - When a relay is collecting internal statistics about how many
11697 create cell requests it has seen of each type, accurately count
11698 the requests from relays that temporarily fall out of the
11699 consensus. (To be extra conservative, we were already ignoring
11700 requests from clients in our counts, and we continue ignoring them
11701 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
11703 o Minor bugfixes (relay, crash):
11704 - Avoid a crash when running with DirPort set but ORPort turned off.
11705 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11707 o Minor bugfixes (restart-in-process):
11708 - When shutting down, Tor now clears all the flags in the control.c
11709 module. This should prevent a bug where authentication cookies are
11710 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11712 o Minor bugfixes (testing):
11713 - When testing workqueue event-cancellation, make sure that we
11714 actually cancel an event, and that cancel each event with equal
11715 probability. (It was previously possible, though extremely
11716 unlikely, for our event-canceling test not to cancel any events.)
11717 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
11718 - Repeat part of the test in test_client_pick_intro() a number of
11719 times, to give it consistent coverage. Fixes bug 25996; bugfix
11721 - Remove randomness from the hs_common/responsible_hsdirs test, so
11722 that it always takes the same path through the function it tests.
11723 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
11724 - Change the behavior of the "channel/outbound" test so that it
11725 never causes a 10-second rollover for the EWMA circuitmux code.
11726 Previously, this behavior would happen randomly, and result in
11727 fluctuating test coverage. Fixes bug 25994; bugfix
11729 - Use X509_new() to allocate certificates that will be freed later
11730 with X509_free(). Previously, some parts of the unit tests had
11731 used tor_malloc_zero(), which is incorrect, and which caused test
11732 failures on Windows when they were built with extra hardening.
11733 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
11735 - While running the circuit_timeout test, fix the PRNG to a
11736 deterministic AES stream, so that the test coverage from this test
11737 will itself be deterministic. Fixes bug 25995; bugfix
11740 o Minor bugfixes (vanguards):
11741 - Allow the last hop in a vanguard circuit to be the same as our
11742 first, to prevent the adversary from influencing guard node choice
11743 by choice of last hop. Also prevent the creation of A - B - A
11744 paths, or A - A paths, which are forbidden by relays. Fixes bug
11745 25870; bugfix on 0.3.3.1-alpha.
11747 o Code simplification and refactoring:
11748 - Remove duplicate code in parse_{c,s}method_line and bootstrap
11749 their functionalities into a single function. Fixes bug 6236;
11750 bugfix on 0.2.3.6-alpha.
11751 - We remove the PortForwarding and PortForwardingHelper options,
11752 related functions, and the port_forwarding tests. These options
11753 were used by the now-deprecated Vidalia to help ordinary users
11754 become Tor relays or bridges. Closes ticket 25409. Patch by
11756 - In order to make the OR and dir checking function in router.c less
11757 confusing we renamed some functions and
11758 consider_testing_reachability() has been split into
11759 router_should_check_reachability() and
11760 router_do_reachability_checks(). Also we improved the documentation
11761 in some functions. Closes ticket 18918.
11762 - Initial work to isolate Libevent usage to a handful of modules in
11763 our codebase, to simplify our call structure, and so that we can
11764 more easily change event loops in the future if needed. Closes
11766 - Introduce a function to call getsockname() and return tor_addr_t,
11767 to save a little complexity throughout the codebase. Closes
11769 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
11770 as hsdir_index is always present. Also, we move hsdir_index_t into
11771 or.h. Closes ticket 23094. Patch by Neel Chauhan.
11772 - Merge functions used for describing nodes and suppress the
11773 functions that do not allocate memory for the output buffer
11774 string. NODE_DESC_BUF_LEN constant and format_node_description()
11775 function cannot be used externally from router.c module anymore.
11776 Closes ticket 25432. Patch by valentecaio.
11777 - Our main loop has been simplified so that all important operations
11778 happen inside events. Previously, some operations had to happen
11779 outside the event loop, to prevent infinite sequences of event
11780 activations. Closes ticket 25374.
11781 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
11782 it in register_intro_circ() and service_intro_point_new(). This
11783 prevents the digest from being re-calculated each time. Closes
11784 ticket 23107. Patch by Neel Chauhan.
11785 - Refactor token-bucket implementations to use a common backend.
11786 Closes ticket 25766.
11787 - Remove extern declaration of stats_n_seconds_working variable from
11788 main, protecting its accesses with get_uptime() and reset_uptime()
11789 functions. Closes ticket 25081, patch by “valentecaio”.
11790 - Remove our previous logic for "cached gettimeofday()" -- our
11791 coarse monotonic timers are fast enough for this purpose, and far
11792 less error-prone. Implements part of ticket 25927.
11793 - Remove the return value for fascist_firewall_choose_address_base(),
11794 and sister functions such as fascist_firewall_choose_address_node()
11795 and fascist_firewall_choose_address_rs(). Also, while we're here,
11796 initialize the ap argument as leaving it uninitialized can pose a
11797 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
11798 - Rename two fields of connection_t struct. timestamp_lastwritten is
11799 renamed to timestamp_last_write_allowed and timestamp_lastread is
11800 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
11802 - Since Tor requires C99, remove our old workaround code for libc
11803 implementations where free(NULL) doesn't work. Closes ticket 24484.
11804 - Use our standard rate-limiting code to deal with excessive
11805 libevent failures, rather than the hand-rolled logic we had
11806 before. Closes ticket 26016.
11807 - We remove the return value of node_get_prim_orport() and
11808 node_get_prim_dirport(), and introduce node_get_prim_orport() in
11809 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
11810 check for a null address. Closes ticket 23873. Patch by
11812 - We switch to should_record_bridge_info() in
11813 geoip_note_client_seen() and options_need_geoip_info() instead of
11814 accessing the configuration values directly. Fixes bug 25290;
11815 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
11817 o Deprecated features:
11818 - As we are not recommending 0.2.5 anymore, we require relays that
11819 once had an ed25519 key associated with their RSA key to always
11820 have that key, instead of allowing them to drop back to a version
11821 that didn't support ed25519. This means they need to use a new RSA
11822 key if they want to downgrade to an older version of tor without
11823 ed25519. Closes ticket 20522.
11826 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11827 ticket 25857. Patch from "CTassisF".
11829 o Removed features:
11830 - Directory authorities will no longer support voting according to
11831 any consensus method before consensus method 25. This keeps
11832 authorities compatible with all authorities running 0.2.9.8 and
11833 later, and does not break any clients or relays. Implements ticket
11834 24378 and proposal 290.
11835 - The PortForwarding and PortForwardingHelper features have been
11836 removed. The reasoning is, given that implementations of NAT
11837 traversal protocols within common consumer grade routers are
11838 frequently buggy, and that the target audience for a NAT punching
11839 feature is a perhaps less-technically-inclined relay operator,
11840 when the helper fails to setup traversal the problems are usually
11841 deep, ugly, and very router specific, making them horrendously
11842 impossible for technical support to reliable assist with, and thus
11843 resulting in frustration all around. Unfortunately, relay
11844 operators who would like to run relays behind NATs will need to
11845 become more familiar with the port forwarding configurations on
11846 their local router. Closes 25409.
11847 - The TestingEnableTbEmptyEvent option has been removed. It was used
11848 in testing simulations to measure how often connection buckets
11849 were emptied, in order to improve our scheduling, but it has not
11850 been actively used in years. Closes ticket 25760.
11851 - The old "round-robin" circuit multiplexer (circuitmux)
11852 implementation has been removed, along with a fairly large set of
11853 code that existed to support it. It has not been the default
11854 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
11855 but it still required an unreasonable amount of memory and CPU.
11856 Closes ticket 25268.
11859 Changes in version 0.3.3.5-rc - 2018-04-15
11860 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
11861 including some that could affect reliability or correctness.
11863 This is the first release candidate in the 0.3.3 series. If we find no
11864 new bugs or regression here, then the first stable 0.3.3 release will
11865 be nearly identical to this one.
11867 o Major bugfixes (security, protover, voting):
11868 - Revise Rust implementation of protover to use a more memory-
11869 efficient voting algorithm and corresponding data structures, thus
11870 avoiding a potential memory-based DoS attack where specially
11871 crafted protocol strings would expand to fill available memory.
11872 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11874 o Major bugfixes (performance, load balancing):
11875 - Directory authorities no longer vote in favor of the Guard flag
11876 for relays without directory support. Starting in Tor
11877 0.3.0.1-alpha, clients have been avoiding using such relays in the
11878 Guard position, leading to increasingly broken load balancing for
11879 the 5%-or-so of Guards that don't advertise directory support.
11880 Fixes bug 22310; bugfix on 0.3.0.6.
11882 o Minor feature (continuous integration):
11883 - Update the Travis CI configuration to use the stable Rust channel,
11884 now that we have decided to require that. Closes ticket 25714.
11886 o Minor features (config options):
11887 - Change the way the default value for MaxMemInQueues is calculated.
11888 We now use 40% of the hardware RAM if the system has 8 GB RAM or
11889 more. Otherwise we use the former value of 75%. Closes
11892 o Minor features (geoip):
11893 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
11894 Country database. Closes ticket 25718.
11896 o Minor bugfixes (client):
11897 - When using a listed relay as a bridge, and also using
11898 microdescriptors, and considering that relay as a non-bridge in a
11899 circuit, treat its microdescriptor as a valid source of
11900 information about that relay. This change should prevent a non-
11901 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
11903 o Minor bugfixes (controller):
11904 - Restore the correct operation of the RESOLVE command, which had
11905 been broken since we added the ability to enable/disable DNS on
11906 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
11908 o Minor bugfixes (distribution, compilation, rust):
11909 - Build correctly when the rust dependencies submodule is loaded,
11910 but the TOR_RUST_DEPENDENCIES environment variable is not set.
11911 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
11912 - Actually include all of our Rust source in our source
11913 distributions. (Previously, a few of the files were accidentally
11914 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
11916 o Minor bugfixes (documentation):
11917 - Document that the PerConnBW{Rate,Burst} options will fall back to
11918 their corresponding consensus parameters only if those parameters
11919 are set. Previously we had claimed that these values would always
11920 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
11921 - Revert a misformatting issue in the ExitPolicy documentation.
11922 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
11924 o Minor bugfixes (exit relay DNS retries):
11925 - Re-attempt timed-out DNS queries 3 times before failure, since our
11926 timeout is 5 seconds for them, but clients wait 10-15. Also allow
11927 slightly more timeouts per resolver when an exit has multiple
11928 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
11930 o Minor bugfixes (onion services):
11931 - Re-instate counting the client HSDir fetch circuits against the
11932 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
11934 - Remove underscores from the _HSLayer{2,3}Nodes options. This
11935 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
11936 Fixes bug 25581; bugfix on 0.3.3.1-alpha
11938 o Code simplification and refactoring:
11939 - Move the list of default directory authorities to its own file.
11940 Closes ticket 24854. Patch by "beastr0".
11942 o Documentation (manpage, denial of service):
11943 - Provide more detail about the denial-of-service options, by
11944 listing each mitigation and explaining how they relate. Closes
11948 Changes in version 0.3.3.4-alpha - 2018-03-29
11949 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
11950 the alpha testing of earlier releases in its series. We are
11951 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
11953 o New system requirements:
11954 - When built with Rust, Tor now depends on version 0.2.39 of the
11955 libc crate. Closes tickets 25310 and 25664.
11957 o Major bugfixes (relay, connection):
11958 - If we have failed to connect to a relay and received a connection
11959 refused, timeout, or similar error (at the TCP level), do not try
11960 that same address/port again for 60 seconds after the failure has
11961 occurred. Fixes bug 24767; bugfix on 0.0.6.
11963 o Minor features (geoip):
11964 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
11965 Country database. Closes ticket 25469.
11967 o Minor features (log messages):
11968 - Improve log message in the out-of-memory handler to include
11969 information about memory usage from the different compression
11970 backends. Closes ticket 25372.
11972 o Minor features (sandbox):
11973 - Explicitly permit the poll() system call when the Linux
11974 seccomp2-based sandbox is enabled: apparently, some versions of
11975 libc use poll() when calling getpwnam(). Closes ticket 25313.
11977 o Minor bugfixes (C correctness):
11978 - Fix a very unlikely (impossible, we believe) null pointer
11979 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11980 Coverity; this is CID 1430932.
11982 o Minor bugfixes (channel, client):
11983 - Better identify client connection when reporting to the geoip
11984 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
11986 o Minor bugfixes (compilation):
11987 - Fix a C99 compliance issue in our configuration script that caused
11988 compilation issues when compiling Tor with certain versions of
11989 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11991 o Minor bugfixes (controller, reliability):
11992 - Avoid a (nonfatal) assertion failure when extending a one-hop
11993 circuit from the controller to become a multihop circuit. Fixes
11994 bug 24903; bugfix on 0.2.5.2-alpha.
11996 o Major bugfixes (networking):
11997 - Tor will no longer reject IPv6 address strings from Tor Browser
11998 when they are passed as hostnames in SOCKS5 requests. Fixes bug
11999 25036, bugfix on Tor 0.3.1.2.
12001 o Minor bugfixes (networking):
12002 - string_is_valid_hostname() will not consider IP strings to be
12003 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
12005 o Minor bugfixes (onion service v3):
12006 - Avoid an assertion failure when the next onion service
12007 descriptor rotation type is out of sync with the consensus's
12008 valid-after time. Instead, log a warning message with extra
12009 information, so we can better hunt down the cause of this
12010 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
12012 o Minor bugfixes (testing):
12013 - Avoid intermittent test failures due to a test that had relied on
12014 onion service introduction point creation finishing within 5
12015 seconds of real clock time. Fixes bug 25450; bugfix
12017 - Rust crates are now automatically detected and tested. Previously,
12018 some crates were not tested by `make test-rust` due to a static
12019 string in the `src/test/test_rust.sh` script specifying which
12020 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
12022 o Minor bugfixes (testing, benchmarks):
12023 - Fix a crash when running benchmark tests on win32 systems. The
12024 crash was due to a mutex that wasn't initialized before logging
12025 and options were initialized. Fixes bug 25479; bugfix
12028 o Minor bugfixes (warnings, ipv6):
12029 - Avoid a bug warning that could occur when trying to connect to a
12030 relay over IPv6. This warning would occur on a Tor instance that
12031 downloads router descriptors, but prefers to use microdescriptors.
12032 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
12034 o Code simplification and refactoring:
12035 - Remove the old (deterministic) directory retry logic entirely:
12036 We've used exponential backoff exclusively for some time. Closes
12040 - Improved the documentation of AccountingStart parameter. Closes
12042 - Update the documentation for "Log" to include the current list of
12043 logging domains. Closes ticket 25378.
12046 Changes in version 0.3.1.10 - 2018-03-03
12047 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
12050 It includes an important security fix for a remote crash attack
12051 against directory authorities, tracked as TROVE-2018-001.
12053 This release also backports our new system for improved resistance to
12054 denial-of-service attacks against relays.
12056 This release also fixes several minor bugs and annoyances from
12059 All directory authorities should upgrade to one of the versions
12060 released today. Relays running 0.3.1.x may wish to update to one of
12061 the versions released today, for the DoS mitigations.
12063 Please note: according to our release calendar, Tor 0.3.1 will no
12064 longer be supported after 1 July 2018. If you will be running Tor
12065 after that date, you should make sure to plan to upgrade to the latest
12066 stable version, or downgrade to 0.2.9 (which will receive long-term
12069 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12070 - Fix a protocol-list handling bug that could be used to remotely crash
12071 directory authorities with a null-pointer exception. Fixes bug 25074;
12072 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12075 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
12076 - Give relays some defenses against the recent network overload. We
12077 start with three defenses (default parameters in parentheses).
12078 First: if a single client address makes too many concurrent
12079 connections (>100), hang up on further connections. Second: if a
12080 single client address makes circuits too quickly (more than 3 per
12081 second, with an allowed burst of 90) while also having too many
12082 connections open (3), refuse new create cells for the next while
12083 (1-2 hours). Third: if a client asks to establish a rendezvous
12084 point to you directly, ignore the request. These defenses can be
12085 manually controlled by new torrc options, but relays will also
12086 take guidance from consensus parameters, so there's no need to
12087 configure anything manually. Implements ticket 24902.
12089 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
12090 - Update the sandbox rules so that they should now work correctly
12091 with Glibc 2.26. Closes ticket 24315.
12093 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
12094 - Fix an "off by 2" error in counting rendezvous failures on the
12095 onion service side. While we thought we would stop the rendezvous
12096 attempt after one failed circuit, we were actually making three
12097 circuit attempts before giving up. Now switch to a default of 2,
12098 and allow the consensus parameter "hs_service_max_rdv_failures" to
12099 override. Fixes bug 24895; bugfix on 0.0.6.
12101 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
12102 - Add Link protocol version 5 to the supported protocols list. Fixes
12103 bug 25070; bugfix on 0.3.1.1-alpha.
12105 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
12106 - Fix a set of false positives where relays would consider
12107 connections to other relays as being client-only connections (and
12108 thus e.g. deserving different link padding schemes) if those
12109 relays fell out of the consensus briefly. Now we look only at the
12110 initial handshake and whether the connection authenticated as a
12111 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12113 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
12114 - Make our OOM handler aware of the geoip client history cache so it
12115 doesn't fill up the memory. This check is important for IPv6 and
12116 our DoS mitigation subsystem. Closes ticket 25122.
12118 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
12119 - Change relay bandwidth reporting stats interval from 4 hours to 24
12120 hours in order to reduce the efficiency of guard discovery
12121 attacks. Fixes ticket 23856.
12123 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
12124 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12125 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12126 since they neither disabled TLS 1.3 nor enabled any of the
12127 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12128 Closes ticket 24978.
12130 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
12131 - The fallback directory list has been re-generated based on the
12132 current status of the network. Tor uses fallback directories to
12133 bootstrap when it doesn't yet have up-to-date directory
12134 information. Closes ticket 24801.
12135 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12136 prefer to bootstrap from fallback directory mirrors. This is a
12137 follow-up to 24679, which removed weights from the default
12138 fallbacks. Implements ticket 24681.
12140 o Minor features (geoip):
12141 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12144 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12145 - Use the actual observed address of an incoming relay connection,
12146 not the canonical address of the relay from its descriptor, when
12147 making decisions about how to handle the incoming connection.
12148 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12150 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12151 - Directory authorities, when refusing a descriptor from a rejected
12152 relay, now explicitly tell the relay (in its logs) to set a valid
12153 ContactInfo address and contact the bad-relays@ mailing list.
12154 Fixes bug 25170; bugfix on 0.2.9.1.
12156 o Minor bugfixes (address selection, backport from 0.3.2.9):
12157 - When the fascist_firewall_choose_address_ functions don't find a
12158 reachable address, set the returned address to the null address
12159 and port. This is a precautionary measure, because some callers do
12160 not check the return value. Fixes bug 24736; bugfix
12163 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
12164 - Fetch descriptors aggressively whenever we lack enough to build
12165 circuits, regardless of how many descriptors we are missing.
12166 Previously, we would delay launching the fetch when we had fewer
12167 than 15 missing descriptors, even if some of those descriptors
12168 were blocking circuits from building. Fixes bug 23985; bugfix on
12169 0.1.1.11-alpha. The effects of this bug became worse in
12170 0.3.0.3-alpha, when we began treating missing descriptors from our
12171 primary guards as a reason to delay circuits.
12172 - Don't try fetching microdescriptors from relays that have failed
12173 to deliver them in the past. Fixes bug 23817; bugfix
12176 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
12177 - Fix a signed/unsigned comparison warning introduced by our fix to
12178 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12180 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
12181 - Avoid a crash when attempting to use the seccomp2 sandbox together
12182 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12185 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12186 - Fix a possible crash on malformed consensus. If a consensus had
12187 contained an unparseable protocol line, it could have made clients
12188 and relays crash with a null-pointer exception. To exploit this
12189 issue, however, an attacker would need to be able to subvert the
12190 directory authority system. Fixes bug 25251; bugfix on
12191 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12193 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
12194 - Recover better from empty or corrupt files in the consensus cache
12195 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
12196 - When a consensus diff calculation is only partially successful,
12197 only record the successful parts as having succeeded. Partial
12198 success can happen if (for example) one compression method fails
12199 but the others succeed. Previously we misrecorded all the
12200 calculations as having succeeded, which would later cause a
12201 nonfatal assertion failure. Fixes bug 24086; bugfix
12204 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
12205 - Tor now updates its guard state when it reads a consensus
12206 regardless of whether it's missing descriptors. That makes tor use
12207 its primary guards to fetch descriptors in some edge cases where
12208 it would previously have used fallback directories. Fixes bug
12209 23862; bugfix on 0.3.0.1-alpha.
12211 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12212 - Don't treat inability to store a cached consensus object as a bug:
12213 it can happen normally when we are out of disk space. Fixes bug
12214 24859; bugfix on 0.3.1.1-alpha.
12216 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
12217 - When queuing DESTROY cells on a channel, only queue the circuit-id
12218 and reason fields: not the entire 514-byte cell. This fix should
12219 help mitigate any bugs or attacks that fill up these queues, and
12220 free more RAM for other uses. Fixes bug 24666; bugfix
12223 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
12224 - When closing a connection via close_connection_immediately(), we
12225 mark it as "not blocked on bandwidth", to prevent later calls from
12226 trying to unblock it, and give it permission to read. This fixes a
12227 backtrace warning that can happen on relays under various
12228 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12230 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
12231 - When selecting relays by bandwidth, avoid a rounding error that
12232 could sometimes cause load to be imbalanced incorrectly.
12233 Previously, we would always round upwards; now, we round towards
12234 the nearest integer. This had the biggest effect when a relay's
12235 weight adjustments should have given it weight 0, but it got
12236 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12237 - When calculating the fraction of nodes that have descriptors, and
12238 all nodes in the network have zero bandwidths, count the number of
12239 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12240 - Actually log the total bandwidth in compute_weighted_bandwidths().
12241 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12243 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12244 - Improve the performance of our consensus-diff application code
12245 when Tor is built with the --enable-fragile-hardening option set.
12246 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12248 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12249 - Don't exit the Tor process if setrlimit() fails to change the file
12250 limit (which can happen sometimes on some versions of OSX). Fixes
12251 bug 21074; bugfix on 0.0.9pre5.
12253 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
12254 - Fix a bug in the bit-counting parts of our timing-wheel code on
12255 MSVC. (Note that MSVC is still not a supported build platform, due
12256 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
12259 o Minor bugfixes (relay, partial backport):
12260 - Make the internal channel_is_client() function look at what sort
12261 of connection handshake the other side used, rather than whether
12262 the other side ever sent a create_fast cell to us. Backports part
12263 of the fixes from bugs 22805 and 24898.
12265 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12266 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12268 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12269 bugfix on 0.2.9.4-alpha.
12271 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12272 - Update the "rust dependencies" submodule to be a project-level
12273 repository, rather than a user repository. Closes ticket 25323.
12276 Changes in version 0.2.9.15 - 2018-03-03
12277 Tor 0.2.9.15 backports important security and stability bugfixes from
12278 later Tor releases.
12280 It includes an important security fix for a remote crash attack
12281 against directory authorities, tracked as TROVE-2018-001.
12283 This release also backports our new system for improved resistance to
12284 denial-of-service attacks against relays.
12286 This release also fixes several minor bugs and annoyances from
12289 All directory authorities should upgrade to one of the versions
12290 released today. Relays running 0.2.9.x may wish to update to one of
12291 the versions released today, for the DoS mitigations.
12293 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12294 - Fix a protocol-list handling bug that could be used to remotely crash
12295 directory authorities with a null-pointer exception. Fixes bug 25074;
12296 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12299 o Major features (denial-of-service mitigation):
12300 - Give relays some defenses against the recent network overload. We
12301 start with three defenses (default parameters in parentheses).
12302 First: if a single client address makes too many concurrent
12303 connections (>100), hang up on further connections. Second: if a
12304 single client address makes circuits too quickly (more than 3 per
12305 second, with an allowed burst of 90) while also having too many
12306 connections open (3), refuse new create cells for the next while
12307 (1-2 hours). Third: if a client asks to establish a rendezvous
12308 point to you directly, ignore the request. These defenses can be
12309 manually controlled by new torrc options, but relays will also
12310 take guidance from consensus parameters, so there's no need to
12311 configure anything manually. Implements ticket 24902.
12313 o Major bugfixes (bootstrapping):
12314 - Fetch descriptors aggressively whenever we lack enough to build
12315 circuits, regardless of how many descriptors we are missing.
12316 Previously, we would delay launching the fetch when we had fewer
12317 than 15 missing descriptors, even if some of those descriptors
12318 were blocking circuits from building. Fixes bug 23985; bugfix on
12319 0.1.1.11-alpha. The effects of this bug became worse in
12320 0.3.0.3-alpha, when we began treating missing descriptors from our
12321 primary guards as a reason to delay circuits.
12323 o Major bugfixes (onion services, retry behavior):
12324 - Fix an "off by 2" error in counting rendezvous failures on the
12325 onion service side. While we thought we would stop the rendezvous
12326 attempt after one failed circuit, we were actually making three
12327 circuit attempts before giving up. Now switch to a default of 2,
12328 and allow the consensus parameter "hs_service_max_rdv_failures" to
12329 override. Fixes bug 24895; bugfix on 0.0.6.
12331 o Minor feature (relay statistics):
12332 - Change relay bandwidth reporting stats interval from 4 hours to 24
12333 hours in order to reduce the efficiency of guard discovery
12334 attacks. Fixes ticket 23856.
12336 o Minor features (compatibility, OpenSSL):
12337 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12338 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12339 since they neither disabled TLS 1.3 nor enabled any of the
12340 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12341 Closes ticket 24978.
12343 o Minor features (denial-of-service avoidance):
12344 - Make our OOM handler aware of the geoip client history cache so it
12345 doesn't fill up the memory. This check is important for IPv6 and
12346 our DoS mitigation subsystem. Closes ticket 25122.
12348 o Minor features (fallback directory mirrors):
12349 - The fallback directory list has been re-generated based on the
12350 current status of the network. Tor uses fallback directories to
12351 bootstrap when it doesn't yet have up-to-date directory
12352 information. Closes ticket 24801.
12353 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12354 prefer to bootstrap from fallback directory mirrors. This is a
12355 follow-up to 24679, which removed weights from the default
12356 fallbacks. Implements ticket 24681.
12358 o Minor features (geoip):
12359 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12362 o Minor features (linux seccomp2 sandbox):
12363 - Update the sandbox rules so that they should now work correctly
12364 with Glibc 2.26. Closes ticket 24315.
12366 o Minor bugfix (channel connection):
12367 - Use the actual observed address of an incoming relay connection,
12368 not the canonical address of the relay from its descriptor, when
12369 making decisions about how to handle the incoming connection.
12370 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12372 o Minor bugfix (directory authority):
12373 - Directory authorities, when refusing a descriptor from a rejected
12374 relay, now explicitly tell the relay (in its logs) to set a valid
12375 ContactInfo address and contact the bad-relays@ mailing list.
12376 Fixes bug 25170; bugfix on 0.2.9.1.
12378 o Minor bugfixes (address selection):
12379 - When the fascist_firewall_choose_address_ functions don't find a
12380 reachable address, set the returned address to the null address
12381 and port. This is a precautionary measure, because some callers do
12382 not check the return value. Fixes bug 24736; bugfix
12385 o Minor bugfixes (compilation):
12386 - Fix a signed/unsigned comparison warning introduced by our fix to
12387 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12389 o Minor bugfixes (control port, linux seccomp2 sandbox):
12390 - Avoid a crash when attempting to use the seccomp2 sandbox together
12391 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12394 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12395 - Fix a possible crash on malformed consensus. If a consensus had
12396 contained an unparseable protocol line, it could have made clients
12397 and relays crash with a null-pointer exception. To exploit this
12398 issue, however, an attacker would need to be able to subvert the
12399 directory authority system. Fixes bug 25251; bugfix on
12400 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12402 o Minor bugfixes (memory usage):
12403 - When queuing DESTROY cells on a channel, only queue the circuit-id
12404 and reason fields: not the entire 514-byte cell. This fix should
12405 help mitigate any bugs or attacks that fill up these queues, and
12406 free more RAM for other uses. Fixes bug 24666; bugfix
12409 o Minor bugfixes (network layer):
12410 - When closing a connection via close_connection_immediately(), we
12411 mark it as "not blocked on bandwidth", to prevent later calls from
12412 trying to unblock it, and give it permission to read. This fixes a
12413 backtrace warning that can happen on relays under various
12414 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12416 o Minor bugfixes (OSX):
12417 - Don't exit the Tor process if setrlimit() fails to change the file
12418 limit (which can happen sometimes on some versions of OSX). Fixes
12419 bug 21074; bugfix on 0.0.9pre5.
12421 o Minor bugfixes (path selection):
12422 - When selecting relays by bandwidth, avoid a rounding error that
12423 could sometimes cause load to be imbalanced incorrectly.
12424 Previously, we would always round upwards; now, we round towards
12425 the nearest integer. This had the biggest effect when a relay's
12426 weight adjustments should have given it weight 0, but it got
12427 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12428 - When calculating the fraction of nodes that have descriptors, and
12429 all nodes in the network have zero bandwidths, count the number of
12430 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12431 - Actually log the total bandwidth in compute_weighted_bandwidths().
12432 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12434 o Minor bugfixes (portability, msvc):
12435 - Fix a bug in the bit-counting parts of our timing-wheel code on
12436 MSVC. (Note that MSVC is still not a supported build platform, due
12437 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12440 o Minor bugfixes (relay):
12441 - Make the internal channel_is_client() function look at what sort
12442 of connection handshake the other side used, rather than whether
12443 the other side ever sent a create_fast cell to us. Backports part
12444 of the fixes from bugs 22805 and 24898.
12446 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12447 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12449 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12450 bugfix on 0.2.9.4-alpha.
12453 Changes in version 0.3.2.10 - 2018-03-03
12454 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
12455 backports a number of bugfixes, including important fixes for security
12458 It includes an important security fix for a remote crash attack
12459 against directory authorities, tracked as TROVE-2018-001.
12461 Additionally, it backports a fix for a bug whose severity we have
12462 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
12463 triggered in order to crash relays with a use-after-free pattern. As
12464 such, we are now tracking that bug as TROVE-2018-002 and
12465 CVE-2018-0491, and backporting it to earlier releases. This bug
12466 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
12469 This release also backports our new system for improved resistance to
12470 denial-of-service attacks against relays.
12472 This release also fixes several minor bugs and annoyances from
12475 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
12476 today, for the fix to TROVE-2018-002. Directory authorities should
12477 also upgrade. (Relays on earlier versions might want to update too for
12478 the DoS mitigations.)
12480 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12481 - Fix a protocol-list handling bug that could be used to remotely crash
12482 directory authorities with a null-pointer exception. Fixes bug 25074;
12483 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12486 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
12487 - Avoid adding the same channel twice in the KIST scheduler pending
12488 list, which could lead to remote denial-of-service use-after-free
12489 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
12491 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
12492 - Give relays some defenses against the recent network overload. We
12493 start with three defenses (default parameters in parentheses).
12494 First: if a single client address makes too many concurrent
12495 connections (>100), hang up on further connections. Second: if a
12496 single client address makes circuits too quickly (more than 3 per
12497 second, with an allowed burst of 90) while also having too many
12498 connections open (3), refuse new create cells for the next while
12499 (1-2 hours). Third: if a client asks to establish a rendezvous
12500 point to you directly, ignore the request. These defenses can be
12501 manually controlled by new torrc options, but relays will also
12502 take guidance from consensus parameters, so there's no need to
12503 configure anything manually. Implements ticket 24902.
12505 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
12506 - Fix an "off by 2" error in counting rendezvous failures on the
12507 onion service side. While we thought we would stop the rendezvous
12508 attempt after one failed circuit, we were actually making three
12509 circuit attempts before giving up. Now switch to a default of 2,
12510 and allow the consensus parameter "hs_service_max_rdv_failures" to
12511 override. Fixes bug 24895; bugfix on 0.0.6.
12512 - New-style (v3) onion services now obey the "max rendezvous circuit
12513 attempts" logic. Previously they would make as many rendezvous
12514 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12515 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12517 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
12518 - Add Link protocol version 5 to the supported protocols list. Fixes
12519 bug 25070; bugfix on 0.3.1.1-alpha.
12521 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
12522 - Fix a set of false positives where relays would consider
12523 connections to other relays as being client-only connections (and
12524 thus e.g. deserving different link padding schemes) if those
12525 relays fell out of the consensus briefly. Now we look only at the
12526 initial handshake and whether the connection authenticated as a
12527 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12529 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
12530 - The scheduler subsystem was failing to promptly notice changes in
12531 consensus parameters, making it harder to switch schedulers
12532 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12534 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
12535 - Make our OOM handler aware of the geoip client history cache so it
12536 doesn't fill up the memory. This check is important for IPv6 and
12537 our DoS mitigation subsystem. Closes ticket 25122.
12539 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
12540 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12541 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12542 since they neither disabled TLS 1.3 nor enabled any of the
12543 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12544 Closes ticket 24978.
12546 o Minor features (geoip):
12547 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12550 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
12551 - When logging a failure to create an onion service's descriptor,
12552 also log what the problem with the descriptor was. Diagnostic
12555 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12556 - Use the actual observed address of an incoming relay connection,
12557 not the canonical address of the relay from its descriptor, when
12558 making decisions about how to handle the incoming connection.
12559 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12561 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12562 - Fix a possible crash on malformed consensus. If a consensus had
12563 contained an unparseable protocol line, it could have made clients
12564 and relays crash with a null-pointer exception. To exploit this
12565 issue, however, an attacker would need to be able to subvert the
12566 directory authority system. Fixes bug 25251; bugfix on
12567 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12569 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12570 - Directory authorities, when refusing a descriptor from a rejected
12571 relay, now explicitly tell the relay (in its logs) to set a valid
12572 ContactInfo address and contact the bad-relays@ mailing list.
12573 Fixes bug 25170; bugfix on 0.2.9.1.
12575 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
12576 - When building with Rust on OSX, link against libresolv, to work
12577 around the issue at https://github.com/rust-lang/rust/issues/46797.
12578 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12580 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
12581 - Remove a BUG() statement when a client fetches an onion descriptor
12582 that has a lower revision counter than the one in its cache. This
12583 can happen in normal circumstances due to HSDir desync. Fixes bug
12584 24976; bugfix on 0.3.2.1-alpha.
12586 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12587 - Don't treat inability to store a cached consensus object as a bug:
12588 it can happen normally when we are out of disk space. Fixes bug
12589 24859; bugfix on 0.3.1.1-alpha.
12591 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12592 - Improve the performance of our consensus-diff application code
12593 when Tor is built with the --enable-fragile-hardening option set.
12594 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12596 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12597 - Don't exit the Tor process if setrlimit() fails to change the file
12598 limit (which can happen sometimes on some versions of OSX). Fixes
12599 bug 21074; bugfix on 0.0.9pre5.
12601 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12602 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12604 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12605 bugfix on 0.2.9.4-alpha.
12607 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
12608 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12609 25005; bugfix on 0.3.2.7-rc.
12611 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
12612 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12613 version, when deciding whether a consensus entry can support the
12614 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12615 bugfix on 0.3.2.1-alpha.
12617 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12618 - Update the "rust dependencies" submodule to be a project-level
12619 repository, rather than a user repository. Closes ticket 25323.
12621 o Documentation (backport from 0.3.3.1-alpha)
12622 - Document that operators who run more than one relay or bridge are
12623 expected to set MyFamily and ContactInfo correctly. Closes
12627 Changes in version 0.3.3.3-alpha - 2018-03-03
12628 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
12629 It includes an important security fix for a remote crash attack
12630 against directory authorities tracked as TROVE-2018-001.
12632 Additionally, with this release, we are upgrading the severity of a
12633 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
12634 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
12635 a use-after-free pattern. As such, we are now tracking that bug as
12636 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
12637 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
12639 This release also fixes several minor bugs and annoyances from
12642 Relays running 0.3.2.x should upgrade to one of the versions released
12643 today, for the fix to TROVE-2018-002. Directory authorities should
12644 also upgrade. (Relays on earlier versions might want to update too for
12645 the DoS mitigations.)
12647 o Major bugfixes (denial-of-service, directory authority):
12648 - Fix a protocol-list handling bug that could be used to remotely crash
12649 directory authorities with a null-pointer exception. Fixes bug 25074;
12650 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12653 o Minor features (compatibility, OpenSSL):
12654 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12655 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12656 since they neither disabled TLS 1.3 nor enabled any of the
12657 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12658 Closes ticket 24978.
12660 o Minor features (logging):
12661 - Clarify the log messages produced when getrandom() or a related
12662 entropy-generation mechanism gives an error. Closes ticket 25120.
12664 o Minor features (testing):
12665 - Add a "make test-rust" target to run the rust tests only. Closes
12668 o Minor bugfixes (denial-of-service):
12669 - Fix a possible crash on malformed consensus. If a consensus had
12670 contained an unparseable protocol line, it could have made clients
12671 and relays crash with a null-pointer exception. To exploit this
12672 issue, however, an attacker would need to be able to subvert the
12673 directory authority system. Fixes bug 25251; bugfix on
12674 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12676 o Minor bugfixes (DoS mitigation):
12677 - Add extra safety checks when refilling the circuit creation bucket
12678 to ensure we never set a value above the allowed maximum burst.
12679 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
12680 - When a new consensus arrives, don't update our DoS-mitigation
12681 parameters if we aren't a public relay. Fixes bug 25223; bugfix
12684 o Minor bugfixes (man page, SocksPort):
12685 - Remove dead code from the old "SocksSocket" option, and rename
12686 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
12687 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
12689 o Minor bugfixes (performance):
12690 - Reduce the number of circuits that will be opened at once during
12691 the circuit build timeout phase. This is done by increasing the
12692 idle timeout to 3 minutes, and lowering the maximum number of
12693 concurrent learning circuits to 10. Fixes bug 24769; bugfix
12696 o Minor bugfixes (spec conformance):
12697 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12699 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12700 bugfix on 0.2.9.4-alpha.
12702 o Minor bugfixes (spec conformance, rust):
12703 - Resolve a denial-of-service issue caused by an infinite loop in
12704 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
12705 Also tracked as TROVE-2018-003.
12707 o Code simplification and refactoring:
12708 - Update the "rust dependencies" submodule to be a project-level
12709 repository, rather than a user repository. Closes ticket 25323.
12712 Changes in version 0.3.3.2-alpha - 2018-02-10
12713 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
12714 introduces a mechanism to handle the high loads that many relay
12715 operators have been reporting recently. It also fixes several bugs in
12716 older releases. If this new code proves reliable, we plan to backport
12717 it to older supported release series.
12719 o Major features (denial-of-service mitigation):
12720 - Give relays some defenses against the recent network overload. We
12721 start with three defenses (default parameters in parentheses).
12722 First: if a single client address makes too many concurrent
12723 connections (>100), hang up on further connections. Second: if a
12724 single client address makes circuits too quickly (more than 3 per
12725 second, with an allowed burst of 90) while also having too many
12726 connections open (3), refuse new create cells for the next while
12727 (1-2 hours). Third: if a client asks to establish a rendezvous
12728 point to you directly, ignore the request. These defenses can be
12729 manually controlled by new torrc options, but relays will also
12730 take guidance from consensus parameters, so there's no need to
12731 configure anything manually. Implements ticket 24902.
12733 o Major bugfixes (netflow padding):
12734 - Stop adding unneeded channel padding right after we finish
12735 flushing to a connection that has been trying to flush for many
12736 seconds. Instead, treat all partial or complete flushes as
12737 activity on the channel, which will defer the time until we need
12738 to add padding. This fix should resolve confusing and scary log
12739 messages like "Channel padding timeout scheduled 221453ms in the
12740 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
12742 o Major bugfixes (protocol versions):
12743 - Add Link protocol version 5 to the supported protocols list. Fixes
12744 bug 25070; bugfix on 0.3.1.1-alpha.
12746 o Major bugfixes (scheduler, consensus):
12747 - The scheduler subsystem was failing to promptly notice changes in
12748 consensus parameters, making it harder to switch schedulers
12749 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12751 o Minor features (denial-of-service avoidance):
12752 - Make our OOM handler aware of the geoip client history cache so it
12753 doesn't fill up the memory. This check is important for IPv6 and
12754 our DoS mitigation subsystem. Closes ticket 25122.
12756 o Minor features (directory authority):
12757 - When directory authorities are unable to add signatures to a
12758 pending consensus, log the reason why. Closes ticket 24849.
12760 o Minor features (geoip):
12761 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12764 o Minor features (logging, diagnostic):
12765 - When logging a failure to create an onion service's descriptor,
12766 also log what the problem with the descriptor was. Diagnostic for
12769 o Minor bugfix (channel connection):
12770 - Use the actual observed address of an incoming relay connection,
12771 not the canonical address of the relay from its descriptor, when
12772 making decisions about how to handle the incoming connection.
12773 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12775 o Minor bugfix (directory authority):
12776 - Directory authorities, when refusing a descriptor from a rejected
12777 relay, now explicitly tell the relay (in its logs) to set a valid
12778 ContactInfo address and contact the bad-relays@ mailing list.
12779 Fixes bug 25170; bugfix on 0.2.9.1.
12781 o Minor bugfixes (all versions of Tor):
12782 - Use the "misspell" tool to detect and fix typos throughout the
12783 source code. Fixes bug 23650; bugfix on various versions of Tor.
12784 Patch from Deepesh Pathak.
12786 o Minor bugfixes (circuit, cannibalization):
12787 - Don't cannibalize preemptively-built circuits if we no longer
12788 recognize their first hop. This situation can happen if our Guard
12789 relay went off the consensus after the circuit was created. Fixes
12790 bug 24469; bugfix on 0.0.6.
12792 o Minor bugfixes (correctness):
12793 - Remove a nonworking, unnecessary check to see whether a circuit
12794 hop's identity digest was set when the circuit failed. Fixes bug
12795 24927; bugfix on 0.2.4.4-alpha.
12797 o Minor bugfixes (logging):
12798 - Don't treat inability to store a cached consensus object as a bug:
12799 it can happen normally when we are out of disk space. Fixes bug
12800 24859; bugfix on 0.3.1.1-alpha.
12801 - Fix a (mostly harmless) race condition when invoking
12802 LOG_PROTOCOL_WARN message from a subthread while the torrc options
12803 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
12805 o Minor bugfixes (onion services):
12806 - Remove a BUG() statement when a client fetches an onion descriptor
12807 that has a lower revision counter than the one in its cache. This
12808 can happen in normal circumstances due to HSDir desync. Fixes bug
12809 24976; bugfix on 0.3.2.1-alpha.
12810 - If we are configured to offer a single onion service, don't log
12811 long-term established one hop rendezvous points in the heartbeat.
12812 Fixes bug 25116; bugfix on 0.2.9.6-rc.
12814 o Minor bugfixes (performance):
12815 - Avoid calling protocol_list_supports_protocol() from inside tight
12816 loops when running with cached routerinfo_t objects. Instead,
12817 summarize the relevant protocols as flags in the routerinfo_t, as
12818 we do for routerstatus_t objects. This change simplifies our code
12819 a little, and saves a large amount of short-term memory allocation
12820 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
12822 o Minor bugfixes (Rust FFI):
12823 - Fix a minor memory leak which would happen whenever the C code
12824 would call the Rust implementation of
12825 protover_get_supported_protocols(). This was due to the C version
12826 returning a static string, whereas the Rust version newly allocated
12827 a CString to pass across the FFI boundary. Consequently, the C
12828 code was not expecting to need to free() what it was given. Fixes
12829 bug 25127; bugfix on 0.3.2.1-alpha.
12831 o Minor bugfixes (scheduler, KIST):
12832 - Avoid adding the same channel twice in the KIST scheduler pending
12833 list, which would waste CPU cycles. Fixes bug 24700; bugfix
12836 o Minor bugfixes (unit test, monotonic time):
12837 - Increase a constant (1msec to 10msec) in the monotonic time test
12838 that makes sure the nsec/usec/msec times read are synchronized.
12839 This change was needed to accommodate slow systems like armel or
12840 when the clock_gettime() is not a VDSO on the running kernel.
12841 Fixes bug 25113; bugfix on 0.2.9.1.
12843 o Minor bugfixes (v3 onion services):
12844 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12845 version, when deciding whether a consensus entry can support the
12846 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12847 bugfix on 0.3.2.1-alpha.
12849 o Code simplification and refactoring:
12850 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
12852 - Remove a series of counters used to track circuit extend attempts
12853 and connection status but that in reality we aren't using for
12854 anything other than stats logged by a SIGUSR1 signal. Closes
12857 o Documentation (man page):
12858 - The HiddenServiceVersion torrc option accepts only one number:
12859 either version 2 or 3. Closes ticket 25026; bugfix
12863 Changes in version 0.3.3.1-alpha - 2018-01-25
12864 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
12865 several new features to Tor, including several improvements to
12866 bootstrapping, and support for an experimental "vanguards" feature to
12867 resist guard discovery attacks. This series also includes better
12868 support for applications that need to embed Tor or manage v3
12871 o Major features (embedding):
12872 - There is now a documented stable API for programs that need to
12873 embed Tor. See tor_api.h for full documentation and known bugs.
12874 Closes ticket 23684.
12875 - Tor now has support for restarting in the same process.
12876 Controllers that run Tor using the "tor_api.h" interface can now
12877 restart Tor after Tor has exited. This support is incomplete,
12878 however: we fixed crash bugs that prevented it from working at
12879 all, but many bugs probably remain, including a possibility of
12880 security issues. Implements ticket 24581.
12882 o Major features (IPv6, directory documents):
12883 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
12884 consensus. This information makes it easier for IPv6 clients to
12885 bootstrap and choose reachable entry guards. Implements ticket 23826.
12886 - Add consensus method 28, which removes IPv6 ORPorts from
12887 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
12888 are redundant in microdescs. This change will be used by Tor clients
12889 on 0.2.8.x and later. (That is to say, with all Tor clients that
12890 have IPv6 bootstrap and guard support.) Implements ticket 23828.
12891 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
12892 set by different numbers of authorities. Fixes 23870
12895 o Major features (onion service v3, control port):
12896 - The control port now supports commands and events for v3 onion
12897 services. It is now possible to create ephemeral v3 services using
12898 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
12899 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
12900 DEL_ONION) have been extended to support v3 onion services. Closes
12901 ticket 20699; implements proposal 284.
12903 o Major features (onion services):
12904 - Provide torrc options to pin the second and third hops of onion
12905 service circuits to a list of nodes. The option HSLayer2Guards
12906 pins the second hop, and the option HSLayer3Guards pins the third
12907 hop. These options are for use in conjunction with experiments
12908 with "vanguards" for preventing guard enumeration attacks. Closes
12911 o Major features (rust, portability, experimental):
12912 - Tor now ships with an optional implementation of one of its
12913 smaller modules (protover.c) in the Rust programming language. To
12914 try it out, install a Rust build environment, and configure Tor
12915 with "--enable-rust --enable-cargo-online-mode". This should not
12916 cause any user-visible changes, but should help us gain more
12917 experience with Rust, and plan future Rust integration work.
12918 Implementation by Chelsea Komlo. Closes ticket 22840.
12920 o Minor features (storage, configuration):
12921 - Users can store cached directory documents somewhere other than
12922 the DataDirectory by using the CacheDirectory option. Similarly,
12923 the storage location for relay's keys can be overridden with the
12924 KeyDirectory option. Closes ticket 22703.
12926 o Major features (v3 onion services, ipv6):
12927 - When v3 onion service clients send introduce cells, they now
12928 include the IPv6 address of the rendezvous point, if it has one.
12929 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
12930 in future Tor versions, IPv6-only v3 single onion services will be
12931 able to use IPv6 addresses to connect directly to the rendezvous
12932 point. Closes ticket 23577. Patch by Neel Chauhan.
12934 o Major bugfixes (onion services, retry behavior):
12935 - Fix an "off by 2" error in counting rendezvous failures on the
12936 onion service side. While we thought we would stop the rendezvous
12937 attempt after one failed circuit, we were actually making three
12938 circuit attempts before giving up. Now switch to a default of 2,
12939 and allow the consensus parameter "hs_service_max_rdv_failures" to
12940 override. Fixes bug 24895; bugfix on 0.0.6.
12941 - New-style (v3) onion services now obey the "max rendezvous circuit
12942 attempts" logic. Previously they would make as many rendezvous
12943 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12944 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12946 o Major bugfixes (relays):
12947 - Fix a set of false positives where relays would consider
12948 connections to other relays as being client-only connections (and
12949 thus e.g. deserving different link padding schemes) if those
12950 relays fell out of the consensus briefly. Now we look only at the
12951 initial handshake and whether the connection authenticated as a
12952 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12954 o Minor feature (IPv6):
12955 - Make IPv6-only clients wait for microdescs for relays, even if we
12956 were previously using descriptors (or were using them as a bridge)
12957 and have a cached descriptor for them. Implements ticket 23827.
12958 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
12959 them, rather than waiting to download microdescriptors.
12960 Implements ticket 23827.
12962 o Minor features (cleanup):
12963 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
12964 when it stops. Closes ticket 23271.
12966 o Minor features (defensive programming):
12967 - Most of the functions in Tor that free objects have been replaced
12968 with macros that free the objects and set the corresponding
12969 pointers to NULL. This change should help prevent a large class of
12970 dangling pointer bugs. Closes ticket 24337.
12971 - Where possible, the tor_free() macro now only evaluates its input
12972 once. Part of ticket 24337.
12973 - Check that microdesc ed25519 ids are non-zero in
12974 node_get_ed25519_id() before returning them. Implements ticket
12975 24001, patch by "aruna1234".
12977 o Minor features (embedding):
12978 - Tor can now start with a preauthenticated control connection
12979 created by the process that launched it. This feature is meant for
12980 use by programs that want to launch and manage a Tor process
12981 without allowing other programs to manage it as well. For more
12982 information, see the __OwningControllerFD option documented in
12983 control-spec.txt. Closes ticket 23900.
12984 - On most errors that would cause Tor to exit, it now tries to
12985 return from the tor_main() function, rather than calling the
12986 system exit() function. Most users won't notice a difference here,
12987 but it should be significant for programs that run Tor inside
12988 a separate thread: they should now be able to survive Tor's exit
12989 conditions rather than having Tor shut down the entire process.
12990 Closes ticket 23848.
12991 - Applications that want to embed Tor can now tell Tor not to
12992 register any of its own POSIX signal handlers, using the
12993 __DisableSignalHandlers option. Closes ticket 24588.
12995 o Minor features (fallback directory list):
12996 - Avoid selecting fallbacks that change their IP addresses too
12997 often. Select more fallbacks by ignoring the Guard flag, and
12998 allowing lower cutoffs for the Running and V2Dir flags. Also allow
12999 a lower bandwidth, and a higher number of fallbacks per operator
13000 (5% of the list). Implements ticket 24785.
13001 - Update the fallback whitelist and blacklist based on opt-ins and
13002 relay changes. Closes tickets 22321, 24678, 22527, 24135,
13005 o Minor features (fallback directory mirror configuration):
13006 - Add a nickname to each fallback in a C comment. This makes it
13007 easier for operators to find their relays, and allows stem to use
13008 nicknames to identify fallbacks. Implements ticket 24600.
13009 - Add a type and version header to the fallback directory mirror
13010 file. Also add a delimiter to the end of each fallback entry. This
13011 helps external parsers like stem and Relay Search. Implements
13013 - Add an extrainfo cache flag for each fallback in a C comment. This
13014 allows stem to use fallbacks to fetch extra-info documents, rather
13015 than using authorities. Implements ticket 22759.
13016 - Add the generateFallbackDirLine.py script for automatically
13017 generating fallback directory mirror lines from relay fingerprints.
13018 No more typos! Add the lookupFallbackDirContact.py script for
13019 automatically looking up operator contact info from relay
13020 fingerprints. Implements ticket 24706, patch by teor and atagar.
13021 - Reject any fallback directory mirror that serves an expired
13022 consensus. Implements ticket 20942, patch by "minik".
13023 - Remove commas and equals signs from external string inputs to the
13024 fallback list. This avoids format confusion attacks. Implements
13026 - Remove the "weight=10" line from fallback directory mirror
13027 entries. Ticket 24681 will maintain the current fallback weights
13028 by changing Tor's default fallback weight to 10. Implements
13030 - Stop logging excessive information about fallback netblocks.
13031 Implements ticket 24791.
13033 o Minor features (forward-compatibility):
13034 - If a relay supports some link authentication protocol that we do
13035 not recognize, then include that relay's ed25519 key when telling
13036 other relays to extend to it. Previously, we treated future
13037 versions as if they were too old to support ed25519 link
13038 authentication. Closes ticket 20895.
13040 o Minor features (heartbeat):
13041 - Add onion service information to our heartbeat logs, displaying
13042 stats about the activity of configured onion services. Closes
13045 o Minor features (instrumentation, development):
13046 - Add the MainloopStats option to allow developers to get
13047 instrumentation information from the main event loop via the
13048 heartbeat messages. We hope to use this to improve Tor's behavior
13049 when it's trying to sleep. Closes ticket 24605.
13051 o Minor features (log messages):
13052 - Improve a warning message that happens when we fail to re-parse an
13053 old router because of an expired certificate. Closes ticket 20020.
13054 - Make the log more quantitative when we hit MaxMemInQueues
13055 threshold exposing some values. Closes ticket 24501.
13057 o Minor features (logging, android):
13058 - Added support for the Android logging subsystem. Closes
13061 o Minor features (performance):
13062 - Support predictive circuit building for onion service circuits
13063 with multiple layers of guards. Closes ticket 23101.
13064 - Use stdatomic.h where available, rather than mutexes, to implement
13065 atomic_counter_t. Closes ticket 23953.
13067 o Minor features (performance, 32-bit):
13068 - Improve performance on 32-bit systems by avoiding 64-bit division
13069 when calculating the timestamp in milliseconds for channel padding
13070 computations. Implements ticket 24613.
13071 - Improve performance on 32-bit systems by avoiding 64-bit division
13072 when timestamping cells and buffer chunks for OOM calculations.
13073 Implements ticket 24374.
13075 o Minor features (performance, OSX, iOS):
13076 - Use the mach_approximate_time() function (when available) to
13077 implement coarse monotonic time. Having a coarse time function
13078 should avoid a large number of system calls, and improve
13079 performance slightly, especially under load. Closes ticket 24427.
13081 o Minor features (performance, windows):
13082 - Improve performance on Windows Vista and Windows 7 by adjusting
13083 TCP send window size according to the recommendation from
13084 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
13087 o Major features (relay):
13088 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
13089 operator to use a more reasonable ("reduced") exit policy, rather
13090 than the default one. If you want to run an exit node without
13091 thinking too hard about which ports to allow, this one is for you.
13092 Closes ticket 13605. Patch from Neel Chauhan.
13094 o Minor features (testing, debugging, embedding):
13095 - For development purposes, Tor now has a mode in which it runs for
13096 a few seconds, then stops, and starts again without exiting the
13097 process. This mode is meant to help us debug various issues with
13098 ticket 23847. To use this feature, compile with
13099 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
13100 environment variable. This is expected to crash a lot, and is
13101 really meant for developers only. It will likely be removed in a
13102 future release. Implements ticket 24583.
13104 o Minor bugfix (network IPv6 test):
13105 - Tor's test scripts now check if "ping -6 ::1" works when the user
13106 runs "make test-network-all". Fixes bug 24677; bugfix on
13107 0.2.9.3-alpha. Patch by "ffmancera".
13109 o Minor bugfixes (build, rust):
13110 - Fix output of autoconf checks to display success messages for Rust
13111 dependencies and a suitable rustc compiler version. Fixes bug
13112 24612; bugfix on 0.3.1.3-alpha.
13113 - When building with Rust on OSX, link against libresolv, to work
13114 around the issue at https://github.com/rust-lang/rust/issues/46797.
13115 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
13116 - Don't pass the --quiet option to cargo: it seems to suppress some
13117 errors, which is not what we want to do when building. Fixes bug
13118 24518; bugfix on 0.3.1.7.
13119 - Build correctly when building from outside Tor's source tree with
13120 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
13123 o Minor bugfixes (directory authorities, IPv6):
13124 - When creating a routerstatus (vote) from a routerinfo (descriptor),
13125 set the IPv6 address to the unspecified IPv6 address, and
13126 explicitly initialize the port to zero. Fixes bug 24488; bugfix
13129 o Minor bugfixes (fallback directory mirrors):
13130 - Make updateFallbackDirs.py search harder for python. (Some OSs
13131 don't put it in /usr/bin.) Fixes bug 24708; bugfix
13134 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
13135 - When hibernating, close connections normally and allow them to
13136 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
13138 - Do not attempt to launch self-reachability tests when entering
13139 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
13140 - Resolve several bugs related to descriptor fetching on bridge
13141 clients with bandwidth accounting enabled. (This combination is
13142 not recommended!) Fixes a case of bug 12062; bugfix
13144 - When hibernating, do not attempt to launch DNS checks. Fixes a
13145 case of bug 12062; bugfix on 0.1.2.2-alpha.
13146 - When hibernating, do not try to upload or download descriptors.
13147 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
13149 o Minor bugfixes (IPv6, bridges):
13150 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
13151 bugfix on 0.2.8.2-alpha.
13152 - Tor now sets IPv6 address in the routerstatus as well as in the
13153 router descriptors when updating addresses for a bridge. Closes
13154 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
13156 o Minor bugfixes (linux seccomp2 sandbox):
13157 - When running with the sandbox enabled, reload configuration files
13158 correctly even when %include was used. Previously we would crash.
13159 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
13161 o Minor bugfixes (memory leaks):
13162 - Avoid possible at-exit memory leaks related to use of Libevent's
13163 event_base_once() function. (This function tends to leak memory if
13164 the event_base is closed before the event fires.) Fixes bug 24584;
13165 bugfix on 0.2.8.1-alpha.
13166 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
13169 o Minor bugfixes (OSX):
13170 - Don't exit the Tor process if setrlimit() fails to change the file
13171 limit (which can happen sometimes on some versions of OSX). Fixes
13172 bug 21074; bugfix on 0.0.9pre5.
13174 o Minor bugfixes (performance, fragile-hardening):
13175 - Improve the performance of our consensus-diff application code
13176 when Tor is built with the --enable-fragile-hardening option set.
13177 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
13179 o Minor bugfixes (performance, timeouts):
13180 - Consider circuits for timeout as soon as they complete a hop. This
13181 is more accurate than applying the timeout in
13182 circuit_expire_building() because that function is only called
13183 once per second, which is now too slow for typical timeouts on the
13184 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
13185 - Use onion service circuits (and other circuits longer than 3 hops)
13186 to calculate a circuit build timeout. Previously, Tor only
13187 calculated its build timeout based on circuits that planned to be
13188 exactly 3 hops long. With this change, we include measurements
13189 from all circuits at the point where they complete their third
13190 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
13192 o Minor bugfixes (testing):
13193 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
13194 bugfix on 0.2.3.1-alpha.
13195 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
13196 25005; bugfix on 0.3.2.7-rc.
13198 o Code simplification and refactoring:
13199 - Remove /usr/athena from search path in configure.ac. Closes
13201 - Remove duplicate code in node_has_curve25519_onion_key() and
13202 node_get_curve25519_onion_key(), and add a check for a zero
13203 microdesc curve25519 onion key. Closes ticket 23966, patch by
13204 "aruna1234" and teor.
13205 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
13206 memory allocations with large numbers of OR connections (e.g.
13207 relays). Closes ticket 24119.
13208 - Separate the function that deletes ephemeral files when Tor
13210 - Small changes to Tor's buf_t API to make it suitable for use as a
13211 general-purpose safe string constructor. Closes ticket 22342.
13212 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
13213 avoid source code identifier confusion. Closes ticket 24467.
13214 - The tor_git_revision[] constant no longer needs to be redeclared
13215 by everything that links against the rest of Tor. Done as part of
13216 ticket 23845, to simplify our external API.
13217 - We make extend_info_from_node() use node_get_curve25519_onion_key()
13218 introduced in ticket 23577 to access the curve25519 public keys
13219 rather than accessing it directly. Closes ticket 23760. Patch by
13221 - Add a function to log channels' scheduler state changes to aid
13222 debugging efforts. Closes ticket 24531.
13225 - Add documentation on how to build tor with Rust dependencies
13226 without having to be online. Closes ticket 22907; bugfix
13228 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
13229 traffic. Closes ticket 24318.
13230 - Document that OutboundBindAddress doesn't apply to DNS requests.
13231 Closes ticket 22145. Patch from Aruna Maurya.
13232 - Document that operators who run more than one relay or bridge are
13233 expected to set MyFamily and ContactInfo correctly. Closes
13236 o Code simplification and refactoring (channels):
13237 - Remove the incoming and outgoing channel queues. These were never
13238 used, but still took up a step in our fast path.
13239 - The majority of the channel unit tests have been rewritten and the
13240 code coverage has now been raised to 83.6% for channel.c. Closes
13242 - Remove other dead code from the channel subsystem: All together,
13243 this cleanup has removed more than 1500 lines of code overall and
13244 adding very little except for unit test.
13246 o Code simplification and refactoring (circuit rendezvous):
13247 - Split the client-side rendezvous circuit lookup into two
13248 functions: one that returns only established circuits and another
13249 that returns all kinds of circuits. Closes ticket 23459.
13251 o Code simplification and refactoring (controller):
13252 - Make most of the variables in networkstatus_getinfo_by_purpose()
13253 const. Implements ticket 24489.
13256 Changes in version 0.3.2.9 - 2018-01-09
13257 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
13259 The 0.3.2 series includes our long-anticipated new onion service
13260 design, with numerous security features. (For more information, see
13261 our blog post at https://blog.torproject.org/fall-harvest.) We also
13262 have a new circuit scheduler algorithm for improved performance on
13263 relays everywhere (see https://blog.torproject.org/kist-and-tell),
13264 along with many smaller features and bugfixes.
13266 Per our stable release policy, we plan to support each stable release
13267 series for at least the next nine months, or for three months after
13268 the first stable release of the next series: whichever is longer. If
13269 you need a release with long-term support, we recommend that you stay
13270 with the 0.2.9 series.
13272 Below is a list of the changes since 0.3.2.8-rc. For a list of all
13273 changes since 0.3.1, see the ReleaseNotes file.
13275 o Minor features (fallback directory mirrors):
13276 - The fallback directory list has been re-generated based on the
13277 current status of the network. Tor uses fallback directories to
13278 bootstrap when it doesn't yet have up-to-date directory
13279 information. Closes ticket 24801.
13280 - Make the default DirAuthorityFallbackRate 0.1, so that clients
13281 prefer to bootstrap from fallback directory mirrors. This is a
13282 follow-up to 24679, which removed weights from the default
13283 fallbacks. Implements ticket 24681.
13285 o Minor features (geoip):
13286 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
13289 o Minor bugfixes (address selection):
13290 - When the fascist_firewall_choose_address_ functions don't find a
13291 reachable address, set the returned address to the null address
13292 and port. This is a precautionary measure, because some callers do
13293 not check the return value. Fixes bug 24736; bugfix
13296 o Minor bugfixes (compilation):
13297 - Resolve a few shadowed-variable warnings in the onion service
13298 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
13300 o Minor bugfixes (portability, msvc):
13301 - Fix a bug in the bit-counting parts of our timing-wheel code on
13302 MSVC. (Note that MSVC is still not a supported build platform, due
13303 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
13307 Changes in version 0.3.2.8-rc - 2017-12-21
13308 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
13309 schedulers that had led servers under heavy load to overload their
13310 outgoing connections. All relay operators running earlier 0.3.2.x
13311 versions should upgrade. This version also includes a mitigation for
13312 over-full DESTROY queues leading to out-of-memory conditions: if it
13313 works, we will soon backport it to earlier release series.
13315 This is the second release candidate in the 0.3.2 series. If we find
13316 no new bugs or regression here, then the first stable 0.3.2 release
13317 will be nearly identical to this.
13319 o Major bugfixes (KIST, scheduler):
13320 - The KIST scheduler did not correctly account for data already
13321 enqueued in each connection's send socket buffer, particularly in
13322 cases when the TCP/IP congestion window was reduced between
13323 scheduler calls. This situation lead to excessive per-connection
13324 buffering in the kernel, and a potential memory DoS. Fixes bug
13325 24665; bugfix on 0.3.2.1-alpha.
13327 o Minor features (geoip):
13328 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
13331 o Minor bugfixes (hidden service v3):
13332 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
13333 the probability of reaching a service for a client missing
13334 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
13336 o Minor bugfixes (memory usage):
13337 - When queuing DESTROY cells on a channel, only queue the circuit-id
13338 and reason fields: not the entire 514-byte cell. This fix should
13339 help mitigate any bugs or attacks that fill up these queues, and
13340 free more RAM for other uses. Fixes bug 24666; bugfix
13343 o Minor bugfixes (scheduler, KIST):
13344 - Use a sane write limit for KISTLite when writing onto a connection
13345 buffer instead of using INT_MAX and shoving as much as it can.
13346 Because the OOM handler cleans up circuit queues, we are better
13347 off at keeping them in that queue instead of the connection's
13348 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
13351 Changes in version 0.3.2.7-rc - 2017-12-14
13352 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
13353 including some that could affect reliability or correctness.
13355 This is the first release candidate in the 0.3.2 series. If we find no
13356 new bugs or regression here, then the first stable 0.3.2. release will
13357 be nearly identical to this.
13359 o Major bugfixes (circuit prediction):
13360 - Fix circuit prediction logic so that a client doesn't treat a port
13361 as being "handled" by a circuit if that circuit already has
13362 isolation settings on it. This change should make Tor clients more
13363 responsive by improving their chances of having a pre-created
13364 circuit ready for use when a request arrives. Fixes bug 18859;
13365 bugfix on 0.2.3.3-alpha.
13367 o Minor features (logging):
13368 - Provide better warnings when the getrandom() syscall fails. Closes
13371 o Minor features (portability):
13372 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
13373 (It doesn't yet work with the sandbox enabled.) Closes
13376 o Minor bugfixes (bridge clients, bootstrap):
13377 - Retry directory downloads when we get our first bridge descriptor
13378 during bootstrap or while reconnecting to the network. Keep
13379 retrying every time we get a bridge descriptor, until we have a
13380 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
13381 - Stop delaying bridge descriptor fetches when we have cached bridge
13382 descriptors. Instead, only delay bridge descriptor fetches when we
13383 have at least one reachable bridge. Fixes part of bug 24367;
13384 bugfix on 0.2.0.3-alpha.
13385 - Stop delaying directory fetches when we have cached bridge
13386 descriptors. Instead, only delay bridge descriptor fetches when
13387 all our bridges are definitely unreachable. Fixes part of bug
13388 24367; bugfix on 0.2.0.3-alpha.
13390 o Minor bugfixes (compilation):
13391 - Fix a signed/unsigned comparison warning introduced by our fix to
13392 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
13394 o Minor bugfixes (correctness):
13395 - Fix several places in our codebase where a C compiler would be
13396 likely to eliminate a check, based on assuming that undefined
13397 behavior had not happened elsewhere in the code. These cases are
13398 usually a sign of redundant checking or dubious arithmetic. Found
13399 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
13400 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
13403 o Minor bugfixes (onion service v3):
13404 - Fix a race where an onion service would launch a new intro circuit
13405 after closing an old one, but fail to register it before freeing
13406 the previously closed circuit. This bug was making the service
13407 unable to find the established intro circuit and thus not upload
13408 its descriptor, thus making a service unavailable for up to 24
13409 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
13411 o Minor bugfixes (scheduler, KIST):
13412 - Properly set the scheduler state of an unopened channel in the
13413 KIST scheduler main loop. This prevents a harmless but annoying
13414 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
13415 - Avoid a possible integer overflow when computing the available
13416 space on the TCP buffer of a channel. This had no security
13417 implications; but could make KIST allow too many cells on a
13418 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
13419 - Downgrade to "info" a harmless warning about the monotonic time
13420 moving backwards: This can happen on platform not supporting
13421 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13424 Changes in version 0.3.2.6-alpha - 2017-12-01
13425 This version of Tor is the latest in the 0.3.2 alpha series. It
13426 includes fixes for several important security issues. All Tor users
13427 should upgrade to this release, or to one of the other releases coming
13430 o Major bugfixes (security):
13431 - Fix a denial of service bug where an attacker could use a
13432 malformed directory object to cause a Tor instance to pause while
13433 OpenSSL would try to read a passphrase from the terminal. (Tor
13434 instances run without a terminal, which is the case for most Tor
13435 packages, are not impacted.) Fixes bug 24246; bugfix on every
13436 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13437 Found by OSS-Fuzz as testcase 6360145429790720.
13438 - Fix a denial of service issue where an attacker could crash a
13439 directory authority using a malformed router descriptor. Fixes bug
13440 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13442 - When checking for replays in the INTRODUCE1 cell data for a
13443 (legacy) onion service, correctly detect replays in the RSA-
13444 encrypted part of the cell. We were previously checking for
13445 replays on the entire cell, but those can be circumvented due to
13446 the malleability of Tor's legacy hybrid encryption. This fix helps
13447 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13448 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13451 o Major bugfixes (security, onion service v2):
13452 - Fix a use-after-free error that could crash v2 Tor onion services
13453 when they failed to open circuits while expiring introduction
13454 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13455 also tracked as TROVE-2017-013 and CVE-2017-8823.
13457 o Major bugfixes (security, relay):
13458 - When running as a relay, make sure that we never build a path
13459 through ourselves, even in the case where we have somehow lost the
13460 version of our descriptor appearing in the consensus. Fixes part
13461 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13462 as TROVE-2017-012 and CVE-2017-8822.
13463 - When running as a relay, make sure that we never choose ourselves
13464 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13465 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13467 o Minor feature (relay statistics):
13468 - Change relay bandwidth reporting stats interval from 4 hours to 24
13469 hours in order to reduce the efficiency of guard discovery
13470 attacks. Fixes ticket 23856.
13472 o Minor features (directory authority):
13473 - Add an IPv6 address for the "bastet" directory authority. Closes
13476 o Minor bugfixes (client):
13477 - By default, do not enable storage of client-side DNS values. These
13478 values were unused by default previously, but they should not have
13479 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
13482 Changes in version 0.3.1.9 - 2017-12-01:
13483 Tor 0.3.1.9 backports important security and stability fixes from the
13484 0.3.2 development series. All Tor users should upgrade to this
13485 release, or to another of the releases coming out today.
13487 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13488 - Fix a denial of service bug where an attacker could use a
13489 malformed directory object to cause a Tor instance to pause while
13490 OpenSSL would try to read a passphrase from the terminal. (Tor
13491 instances run without a terminal, which is the case for most Tor
13492 packages, are not impacted.) Fixes bug 24246; bugfix on every
13493 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13494 Found by OSS-Fuzz as testcase 6360145429790720.
13495 - Fix a denial of service issue where an attacker could crash a
13496 directory authority using a malformed router descriptor. Fixes bug
13497 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13499 - When checking for replays in the INTRODUCE1 cell data for a
13500 (legacy) onion service, correctly detect replays in the RSA-
13501 encrypted part of the cell. We were previously checking for
13502 replays on the entire cell, but those can be circumvented due to
13503 the malleability of Tor's legacy hybrid encryption. This fix helps
13504 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13505 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13508 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13509 - Fix a use-after-free error that could crash v2 Tor onion services
13510 when they failed to open circuits while expiring introduction
13511 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13512 also tracked as TROVE-2017-013 and CVE-2017-8823.
13514 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13515 - When running as a relay, make sure that we never build a path
13516 through ourselves, even in the case where we have somehow lost the
13517 version of our descriptor appearing in the consensus. Fixes part
13518 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13519 as TROVE-2017-012 and CVE-2017-8822.
13520 - When running as a relay, make sure that we never choose ourselves
13521 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13522 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13524 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13525 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13526 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13527 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13528 identifying and finding a workaround to this bug and to Moritz,
13529 Arthur Edelstein, and Roger for helping to track it down and
13532 o Minor features (bridge):
13533 - Bridges now include notice in their descriptors that they are
13534 bridges, and notice of their distribution status, based on their
13535 publication settings. Implements ticket 18329. For more fine-
13536 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13539 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13540 - Add an IPv6 address for the "bastet" directory authority. Closes
13543 o Minor features (geoip):
13544 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13547 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13548 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13549 relays, to prevent spurious address resolutions and descriptor
13550 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13551 bugfix on in 0.2.8.1-alpha.
13553 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13554 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13555 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13557 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13558 - When a circuit is marked for close, do not attempt to package any
13559 cells for channels on that circuit. Previously, we would detect
13560 this condition lower in the call stack, when we noticed that the
13561 circuit had no attached channel, and log an annoying message.
13562 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13564 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
13565 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13566 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13569 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13570 - Avoid a crash when transitioning from client mode to bridge mode.
13571 Previously, we would launch the worker threads whenever our
13572 "public server" mode changed, but not when our "server" mode
13573 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13576 Changes in version 0.3.0.13 - 2017-12-01
13577 Tor 0.3.0.13 backports important security and stability bugfixes from
13578 later Tor releases. All Tor users should upgrade to this release, or
13579 to another of the releases coming out today.
13581 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13582 2018. If you need a release with long-term support, please stick with
13583 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13585 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13586 - Fix a denial of service bug where an attacker could use a
13587 malformed directory object to cause a Tor instance to pause while
13588 OpenSSL would try to read a passphrase from the terminal. (Tor
13589 instances run without a terminal, which is the case for most Tor
13590 packages, are not impacted.) Fixes bug 24246; bugfix on every
13591 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13592 Found by OSS-Fuzz as testcase 6360145429790720.
13593 - Fix a denial of service issue where an attacker could crash a
13594 directory authority using a malformed router descriptor. Fixes bug
13595 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13597 - When checking for replays in the INTRODUCE1 cell data for a
13598 (legacy) onion service, correctly detect replays in the RSA-
13599 encrypted part of the cell. We were previously checking for
13600 replays on the entire cell, but those can be circumvented due to
13601 the malleability of Tor's legacy hybrid encryption. This fix helps
13602 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13603 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13606 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13607 - Fix a use-after-free error that could crash v2 Tor onion services
13608 when they failed to open circuits while expiring introduction
13609 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13610 also tracked as TROVE-2017-013 and CVE-2017-8823.
13612 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13613 - When running as a relay, make sure that we never build a path
13614 through ourselves, even in the case where we have somehow lost the
13615 version of our descriptor appearing in the consensus. Fixes part
13616 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13617 as TROVE-2017-012 and CVE-2017-8822.
13618 - When running as a relay, make sure that we never choose ourselves
13619 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13620 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13622 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13623 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13624 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13625 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13626 identifying and finding a workaround to this bug and to Moritz,
13627 Arthur Edelstein, and Roger for helping to track it down and
13630 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13631 - Enable a couple of pieces of Windows hardening: one
13632 (HeapEnableTerminationOnCorruption) that has been on-by-default
13633 since Windows 8, and unavailable before Windows 7; and one
13634 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13635 affect us, but shouldn't do any harm. Closes ticket 21953.
13637 o Minor features (bridge, backport from 0.3.1.9):
13638 - Bridges now include notice in their descriptors that they are
13639 bridges, and notice of their distribution status, based on their
13640 publication settings. Implements ticket 18329. For more fine-
13641 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13644 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13645 - Add an IPv6 address for the "bastet" directory authority. Closes
13648 o Minor features (geoip):
13649 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13652 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13653 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13654 relays, to prevent spurious address resolutions and descriptor
13655 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13656 bugfix on in 0.2.8.1-alpha.
13658 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13659 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13660 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13662 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13663 - When a circuit is marked for close, do not attempt to package any
13664 cells for channels on that circuit. Previously, we would detect
13665 this condition lower in the call stack, when we noticed that the
13666 circuit had no attached channel, and log an annoying message.
13667 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13669 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13670 - Avoid a crash when transitioning from client mode to bridge mode.
13671 Previously, we would launch the worker threads whenever our
13672 "public server" mode changed, but not when our "server" mode
13673 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13675 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13676 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13677 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13680 Changes in version 0.2.9.14 - 2017-12-01
13681 Tor 0.3.0.13 backports important security and stability bugfixes from
13682 later Tor releases. All Tor users should upgrade to this release, or
13683 to another of the releases coming out today.
13685 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13686 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13687 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13688 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13689 identifying and finding a workaround to this bug and to Moritz,
13690 Arthur Edelstein, and Roger for helping to track it down and
13693 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13694 - Fix a denial of service bug where an attacker could use a
13695 malformed directory object to cause a Tor instance to pause while
13696 OpenSSL would try to read a passphrase from the terminal. (Tor
13697 instances run without a terminal, which is the case for most Tor
13698 packages, are not impacted.) Fixes bug 24246; bugfix on every
13699 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13700 Found by OSS-Fuzz as testcase 6360145429790720.
13701 - Fix a denial of service issue where an attacker could crash a
13702 directory authority using a malformed router descriptor. Fixes bug
13703 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13705 - When checking for replays in the INTRODUCE1 cell data for a
13706 (legacy) onion service, correctly detect replays in the RSA-
13707 encrypted part of the cell. We were previously checking for
13708 replays on the entire cell, but those can be circumvented due to
13709 the malleability of Tor's legacy hybrid encryption. This fix helps
13710 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13711 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13714 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13715 - Fix a use-after-free error that could crash v2 Tor onion services
13716 when they failed to open circuits while expiring introduction
13717 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13718 also tracked as TROVE-2017-013 and CVE-2017-8823.
13720 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13721 - When running as a relay, make sure that we never build a path
13722 through ourselves, even in the case where we have somehow lost the
13723 version of our descriptor appearing in the consensus. Fixes part
13724 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13725 as TROVE-2017-012 and CVE-2017-8822.
13727 o Minor features (bridge, backport from 0.3.1.9):
13728 - Bridges now include notice in their descriptors that they are
13729 bridges, and notice of their distribution status, based on their
13730 publication settings. Implements ticket 18329. For more fine-
13731 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13734 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13735 - Add an IPv6 address for the "bastet" directory authority. Closes
13738 o Minor features (geoip):
13739 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13742 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13743 - Enable a couple of pieces of Windows hardening: one
13744 (HeapEnableTerminationOnCorruption) that has been on-by-default
13745 since Windows 8, and unavailable before Windows 7; and one
13746 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13747 affect us, but shouldn't do any harm. Closes ticket 21953.
13749 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13750 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13751 relays, to prevent spurious address resolutions and descriptor
13752 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13753 bugfix on in 0.2.8.1-alpha.
13755 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13756 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13757 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13759 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13760 - When a circuit is marked for close, do not attempt to package any
13761 cells for channels on that circuit. Previously, we would detect
13762 this condition lower in the call stack, when we noticed that the
13763 circuit had no attached channel, and log an annoying message.
13764 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13766 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13767 - Avoid a crash when transitioning from client mode to bridge mode.
13768 Previously, we would launch the worker threads whenever our
13769 "public server" mode changed, but not when our "server" mode
13770 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13772 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13773 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13774 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13777 Changes in version 0.2.8.17 - 2017-12-01
13778 Tor 0.2.8.17 backports important security and stability bugfixes from
13779 later Tor releases. All Tor users should upgrade to this release, or
13780 to another of the releases coming out today.
13782 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13783 2018. If you need a release with long-term support, please upgrade with
13784 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13786 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13787 - Fix a denial of service bug where an attacker could use a
13788 malformed directory object to cause a Tor instance to pause while
13789 OpenSSL would try to read a passphrase from the terminal. (Tor
13790 instances run without a terminal, which is the case for most Tor
13791 packages, are not impacted.) Fixes bug 24246; bugfix on every
13792 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13793 Found by OSS-Fuzz as testcase 6360145429790720.
13794 - When checking for replays in the INTRODUCE1 cell data for a
13795 (legacy) onion service, correctly detect replays in the RSA-
13796 encrypted part of the cell. We were previously checking for
13797 replays on the entire cell, but those can be circumvented due to
13798 the malleability of Tor's legacy hybrid encryption. This fix helps
13799 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13800 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13803 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13804 - Fix a use-after-free error that could crash v2 Tor onion services
13805 when they failed to open circuits while expiring introduction
13806 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13807 also tracked as TROVE-2017-013 and CVE-2017-8823.
13809 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13810 - When running as a relay, make sure that we never build a path through
13811 ourselves, even in the case where we have somehow lost the version of
13812 our descriptor appearing in the consensus. Fixes part of bug 21534;
13813 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
13816 o Minor features (bridge, backport from 0.3.1.9):
13817 - Bridges now include notice in their descriptors that they are
13818 bridges, and notice of their distribution status, based on their
13819 publication settings. Implements ticket 18329. For more fine-
13820 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13823 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13824 - Add an IPv6 address for the "bastet" directory authority. Closes
13827 o Minor features (geoip):
13828 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13831 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13832 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13833 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13836 Changes in version 0.2.5.16 - 2017-12-01
13837 Tor 0.2.5.13 backports important security and stability bugfixes from
13838 later Tor releases. All Tor users should upgrade to this release, or
13839 to another of the releases coming out today.
13841 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13842 2018. If you need a release with long-term support, please upgrade to
13843 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13845 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13846 - Fix a denial of service bug where an attacker could use a
13847 malformed directory object to cause a Tor instance to pause while
13848 OpenSSL would try to read a passphrase from the terminal. (Tor
13849 instances run without a terminal, which is the case for most Tor
13850 packages, are not impacted.) Fixes bug 24246; bugfix on every
13851 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13852 Found by OSS-Fuzz as testcase 6360145429790720.
13853 - When checking for replays in the INTRODUCE1 cell data for a
13854 (legacy) onion service, correctly detect replays in the RSA-
13855 encrypted part of the cell. We were previously checking for
13856 replays on the entire cell, but those can be circumvented due to
13857 the malleability of Tor's legacy hybrid encryption. This fix helps
13858 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13859 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13862 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13863 - When running as a relay, make sure that we never build a path
13864 through ourselves, even in the case where we have somehow lost the
13865 version of our descriptor appearing in the consensus. Fixes part
13866 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13867 as TROVE-2017-012 and CVE-2017-8822.
13869 o Minor features (bridge, backport from 0.3.1.9):
13870 - Bridges now include notice in their descriptors that they are
13871 bridges, and notice of their distribution status, based on their
13872 publication settings. Implements ticket 18329. For more fine-
13873 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13876 o Minor features (geoip):
13877 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13881 Changes in version 0.3.2.5-alpha - 2017-11-22
13882 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
13883 fixes several stability and reliability bugs, including a fix for
13884 intermittent bootstrapping failures that some people have been seeing
13885 since the 0.3.0.x series.
13887 Please test this alpha out -- many of these fixes will soon be
13888 backported to stable Tor versions if no additional bugs are found
13891 o Major bugfixes (bootstrapping):
13892 - Fetch descriptors aggressively whenever we lack enough to build
13893 circuits, regardless of how many descriptors we are missing.
13894 Previously, we would delay launching the fetch when we had fewer
13895 than 15 missing descriptors, even if some of those descriptors
13896 were blocking circuits from building. Fixes bug 23985; bugfix on
13897 0.1.1.11-alpha. The effects of this bug became worse in
13898 0.3.0.3-alpha, when we began treating missing descriptors from our
13899 primary guards as a reason to delay circuits.
13900 - Don't try fetching microdescriptors from relays that have failed
13901 to deliver them in the past. Fixes bug 23817; bugfix
13904 o Minor features (directory authority):
13905 - Make the "Exit" flag assignment only depend on whether the exit
13906 policy allows connections to ports 80 and 443. Previously relays
13907 would get the Exit flag if they allowed connections to one of
13908 these ports and also port 6667. Resolves ticket 23637.
13910 o Minor features (geoip):
13911 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13914 o Minor features (linux seccomp2 sandbox):
13915 - Update the sandbox rules so that they should now work correctly
13916 with Glibc 2.26. Closes ticket 24315.
13918 o Minor features (logging):
13919 - Downgrade a pair of log messages that could occur when an exit's
13920 resolver gave us an unusual (but not forbidden) response. Closes
13922 - Improve the message we log when re-enabling circuit build timeouts
13923 after having received a consensus. Closes ticket 20963.
13925 o Minor bugfixes (compilation):
13926 - Fix a memory leak warning in one of the libevent-related
13927 configuration tests that could occur when manually specifying
13928 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
13929 Found and patched by Alex Xu.
13930 - When detecting OpenSSL on Windows from our configure script, make
13931 sure to try linking with the ws2_32 library. Fixes bug 23783;
13932 bugfix on 0.3.2.2-alpha.
13934 o Minor bugfixes (control port, linux seccomp2 sandbox):
13935 - Avoid a crash when attempting to use the seccomp2 sandbox together
13936 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
13939 o Minor bugfixes (control port, onion services):
13940 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
13941 HS_DESC event when a service is not able to upload a descriptor.
13942 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
13944 o Minor bugfixes (directory cache):
13945 - Recover better from empty or corrupt files in the consensus cache
13946 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
13947 - When a consensus diff calculation is only partially successful,
13948 only record the successful parts as having succeeded. Partial
13949 success can happen if (for example) one compression method fails
13950 but the others succeed. Previously we misrecorded all the
13951 calculations as having succeeded, which would later cause a
13952 nonfatal assertion failure. Fixes bug 24086; bugfix
13955 o Minor bugfixes (logging):
13956 - Only log once if we notice that KIST support is gone. Fixes bug
13957 24158; bugfix on 0.3.2.1-alpha.
13958 - Suppress a log notice when relay descriptors arrive. We already
13959 have a bootstrap progress for this so no need to log notice
13960 everytime tor receives relay descriptors. Microdescriptors behave
13961 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
13963 o Minor bugfixes (network layer):
13964 - When closing a connection via close_connection_immediately(), we
13965 mark it as "not blocked on bandwidth", to prevent later calls from
13966 trying to unblock it, and give it permission to read. This fixes a
13967 backtrace warning that can happen on relays under various
13968 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
13970 o Minor bugfixes (onion services):
13971 - The introduction circuit was being timed out too quickly while
13972 waiting for the rendezvous circuit to complete. Keep the intro
13973 circuit around longer instead of timing out and reopening new ones
13974 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
13975 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13976 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13978 - Silence a warning about failed v3 onion descriptor uploads that
13979 can happen naturally under certain edge cases. Fixes part of bug
13980 23662; bugfix on 0.3.2.1-alpha.
13982 o Minor bugfixes (tests):
13983 - Fix a memory leak in one of the bridge-distribution test cases.
13984 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
13985 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
13986 to correctly handle cases where a caller gives it an RSA key of
13987 under 160 bits. (This is not actually a bug in Tor itself, but
13988 rather in our fuzzing code.) Fixes bug 24247; bugfix on
13989 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
13992 - Add notes in man page regarding OS support for the various
13993 scheduler types. Attempt to use less jargon in the scheduler
13994 section. Closes ticket 24254.
13997 Changes in version 0.3.2.4-alpha - 2017-11-08
13998 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
13999 It fixes several stability and reliability bugs, especially including
14000 a major reliability issue that has been plaguing fast exit relays in
14003 o Major bugfixes (exit relays, DNS):
14004 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
14005 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
14006 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
14007 identifying and finding a workaround to this bug and to Moritz,
14008 Arthur Edelstein, and Roger for helping to track it down and
14011 o Major bugfixes (scheduler, channel):
14012 - Stop processing scheduled channels if they closed while flushing
14013 cells. This can happen if the write on the connection fails
14014 leading to the channel being closed while in the scheduler loop.
14015 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
14017 o Minor features (logging, scheduler):
14018 - Introduce a SCHED_BUG() function to log extra information about
14019 the scheduler state if we ever catch a bug in the scheduler.
14020 Closes ticket 23753.
14022 o Minor features (removed deprecations):
14023 - The ClientDNSRejectInternalAddresses flag can once again be set in
14024 non-testing Tor networks, so long as they do not use the default
14025 directory authorities. This change also removes the deprecation of
14026 this flag from 0.2.9.2-alpha. Closes ticket 21031.
14028 o Minor features (testing):
14029 - Our fuzzing tests now test the encrypted portions of v3 onion
14030 service descriptors. Implements more of 21509.
14032 o Minor bugfixes (directory client):
14033 - On failure to download directory information, delay retry attempts
14034 by a random amount based on the "decorrelated jitter" algorithm.
14035 Our previous delay algorithm tended to produce extra-long delays
14036 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
14038 o Minor bugfixes (IPv6, v3 single onion services):
14039 - Remove buggy code for IPv6-only v3 single onion services, and
14040 reject attempts to configure them. This release supports IPv4,
14041 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
14042 stack v3 single onion services. Fixes bug 23820; bugfix
14045 o Minor bugfixes (logging, relay):
14046 - Give only a protocol warning when the ed25519 key is not
14047 consistent between the descriptor and microdescriptor of a relay.
14048 This can happen, for instance, if the relay has been flagged
14049 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
14051 o Minor bugfixes (manpage, onion service):
14052 - Document that the HiddenServiceNumIntroductionPoints option is
14053 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
14054 bugfix on 0.3.2.1-alpha.
14056 o Minor bugfixes (memory leaks):
14057 - Fix a minor memory leak at exit in the KIST scheduler. This bug
14058 should have no user-visible impact. Fixes bug 23774; bugfix
14060 - Fix a memory leak when decrypting a badly formatted v3 onion
14061 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
14062 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
14064 o Minor bugfixes (onion services):
14065 - Cache some needed onion service client information instead of
14066 constantly computing it over and over again. Fixes bug 23623;
14067 bugfix on 0.3.2.1-alpha.
14068 - Properly retry HSv3 descriptor fetches when missing required
14069 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
14071 o Minor bugfixes (path selection):
14072 - When selecting relays by bandwidth, avoid a rounding error that
14073 could sometimes cause load to be imbalanced incorrectly.
14074 Previously, we would always round upwards; now, we round towards
14075 the nearest integer. This had the biggest effect when a relay's
14076 weight adjustments should have given it weight 0, but it got
14077 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
14078 - When calculating the fraction of nodes that have descriptors, and
14079 all nodes in the network have zero bandwidths, count the number of
14080 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
14081 - Actually log the total bandwidth in compute_weighted_bandwidths().
14082 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
14084 o Minor bugfixes (relay, crash):
14085 - Avoid a crash when transitioning from client mode to bridge mode.
14086 Previously, we would launch the worker threads whenever our
14087 "public server" mode changed, but not when our "server" mode
14088 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
14090 o Minor bugfixes (testing):
14091 - Fix a spurious fuzzing-only use of an uninitialized value. Found
14092 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
14093 - Test that IPv6-only clients can use microdescriptors when running
14094 "make test-network-all". Requires chutney master 61c28b9 or later.
14095 Closes ticket 24109.
14098 Changes in version 0.3.2.3-alpha - 2017-10-27
14099 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
14100 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
14101 directory authority, Bastet.
14103 o Directory authority changes:
14104 - Add "Bastet" as a ninth directory authority to the default list.
14105 Closes ticket 23910.
14106 - The directory authority "Longclaw" has changed its IP address.
14107 Closes ticket 23592.
14109 o Minor features (bridge):
14110 - Bridge relays can now set the BridgeDistribution config option to
14111 add a "bridge-distribution-request" line to their bridge
14112 descriptor, which tells BridgeDB how they'd like their bridge
14113 address to be given out. (Note that as of Oct 2017, BridgeDB does
14114 not yet implement this feature.) As a side benefit, this feature
14115 provides a way to distinguish bridge descriptors from non-bridge
14116 descriptors. Implements tickets 18329.
14118 o Minor features (client, entry guards):
14119 - Improve log messages when missing descriptors for primary guards.
14120 Resolves ticket 23670.
14122 o Minor features (geoip):
14123 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14126 o Minor bugfixes (bridge):
14127 - Overwrite the bridge address earlier in the process of retrieving
14128 its descriptor, to make sure we reach it on the configured
14129 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
14131 o Minor bugfixes (documentation):
14132 - Document better how to read gcov, and what our gcov postprocessing
14133 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
14135 o Minor bugfixes (entry guards):
14136 - Tor now updates its guard state when it reads a consensus
14137 regardless of whether it's missing descriptors. That makes tor use
14138 its primary guards to fetch descriptors in some edge cases where
14139 it would previously have used fallback directories. Fixes bug
14140 23862; bugfix on 0.3.0.1-alpha.
14142 o Minor bugfixes (hidden service client):
14143 - When handling multiple SOCKS request for the same .onion address,
14144 only fetch the service descriptor once.
14145 - When a descriptor fetch fails with a non-recoverable error, close
14146 all pending SOCKS requests for that .onion. Fixes bug 23653;
14147 bugfix on 0.3.2.1-alpha.
14149 o Minor bugfixes (hidden service):
14150 - Always regenerate missing hidden service public key files. Prior
14151 to this, if the public key was deleted from disk, it wouldn't get
14152 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
14154 - Make sure that we have a usable ed25519 key when the intro point
14155 relay supports ed25519 link authentication. Fixes bug 24002;
14156 bugfix on 0.3.2.1-alpha.
14158 o Minor bugfixes (hidden service, v2):
14159 - When reloading configured hidden services, copy all information
14160 from the old service object. Previously, some data was omitted,
14161 causing delays in descriptor upload, and other bugs. Fixes bug
14162 23790; bugfix on 0.2.1.9-alpha.
14164 o Minor bugfixes (memory safety, defensive programming):
14165 - Clear the target address when node_get_prim_orport() returns
14166 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14168 o Minor bugfixes (relay):
14169 - Avoid a BUG warning when receiving a dubious CREATE cell while an
14170 option transition is in progress. Fixes bug 23952; bugfix
14173 o Minor bugfixes (testing):
14174 - Adjust the GitLab CI configuration to more closely match that of
14175 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
14176 - Prevent scripts/test/coverage from attempting to move gcov output
14177 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
14178 - When running unit tests as root, skip a test that would fail
14179 because it expects a permissions error. This affects some
14180 continuous integration setups. Fixes bug 23758; bugfix
14182 - Stop unconditionally mirroring the tor repository in GitLab CI.
14183 This prevented developers from enabling GitLab CI on master. Fixes
14184 bug 23755; bugfix on 0.3.2.2-alpha.
14185 - Fix the hidden service v3 descriptor decoding fuzzing to use the
14186 latest decoding API correctly. Fixes bug 21509; bugfix
14189 o Minor bugfixes (warnings):
14190 - When we get an HTTP request on a SOCKS port, tell the user about
14191 the new HTTPTunnelPort option. Previously, we would give a "Tor is
14192 not an HTTP Proxy" message, which stopped being true when
14193 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
14197 Changes in version 0.2.5.15 - 2017-10-25
14198 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
14199 series. It also adds a new directory authority, Bastet.
14201 Note: the Tor 0.2.5 series will no longer be supported after 1 May
14202 2018. If you need a release with long-term support, please upgrade to
14203 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
14205 o Directory authority changes:
14206 - Add "Bastet" as a ninth directory authority to the default list.
14207 Closes ticket 23910.
14208 - The directory authority "Longclaw" has changed its IP address.
14209 Closes ticket 23592.
14211 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14212 - Avoid an assertion failure bug affecting our implementation of
14213 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14214 handling of "0xx" differs from what we had expected. Fixes bug
14215 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14217 o Minor features (geoip):
14218 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14221 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14222 - Fix a memset() off the end of an array when packing cells. This
14223 bug should be harmless in practice, since the corrupted bytes are
14224 still in the same structure, and are always padding bytes,
14225 ignored, or immediately overwritten, depending on compiler
14226 behavior. Nevertheless, because the memset()'s purpose is to make
14227 sure that any other cell-handling bugs can't expose bytes to the
14228 network, we need to fix it. Fixes bug 22737; bugfix on
14229 0.2.4.11-alpha. Fixes CID 1401591.
14231 o Build features (backport from 0.3.1.5-alpha):
14232 - Tor's repository now includes a Travis Continuous Integration (CI)
14233 configuration file (.travis.yml). This is meant to help new
14234 developers and contributors who fork Tor to a Github repository be
14235 better able to test their changes, and understand what we expect
14236 to pass. To use this new build feature, you must fork Tor to your
14237 Github account, then go into the "Integrations" menu in the
14238 repository settings for your fork and enable Travis, then push
14239 your changes. Closes ticket 22636.
14242 Changes in version 0.2.8.16 - 2017-10-25
14243 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
14244 series, including a bugfix for a crash issue that had affected relays
14245 under memory pressure. It also adds a new directory authority, Bastet.
14247 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
14248 2018. If you need a release with long-term support, please stick with
14249 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
14251 o Directory authority changes:
14252 - Add "Bastet" as a ninth directory authority to the default list.
14253 Closes ticket 23910.
14254 - The directory authority "Longclaw" has changed its IP address.
14255 Closes ticket 23592.
14257 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14258 - Fix a timing-based assertion failure that could occur when the
14259 circuit out-of-memory handler freed a connection's output buffer.
14260 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14262 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14263 - Remove longclaw's IPv6 address, as it will soon change. Authority
14264 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14265 3/8 directory authorities with IPv6 addresses, but there are also
14266 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14268 o Minor features (geoip):
14269 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14273 Changes in version 0.2.9.13 - 2017-10-25
14274 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
14275 series, including a bugfix for a crash issue that had affected relays
14276 under memory pressure. It also adds a new directory authority, Bastet.
14278 o Directory authority changes:
14279 - Add "Bastet" as a ninth directory authority to the default list.
14280 Closes ticket 23910.
14281 - The directory authority "Longclaw" has changed its IP address.
14282 Closes ticket 23592.
14284 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14285 - Fix a timing-based assertion failure that could occur when the
14286 circuit out-of-memory handler freed a connection's output buffer.
14287 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14289 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14290 - Remove longclaw's IPv6 address, as it will soon change. Authority
14291 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14292 3/8 directory authorities with IPv6 addresses, but there are also
14293 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14295 o Minor features (geoip):
14296 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14299 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
14300 - When a directory authority rejects a descriptor or extrainfo with
14301 a given digest, mark that digest as undownloadable, so that we do
14302 not attempt to download it again over and over. We previously
14303 tried to avoid downloading such descriptors by other means, but we
14304 didn't notice if we accidentally downloaded one anyway. This
14305 behavior became problematic in 0.2.7.2-alpha, when authorities
14306 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14309 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14310 - Clear the address when node_get_prim_orport() returns early.
14311 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14313 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
14314 - When running as a Windows service, set the ID of the main thread
14315 correctly. Failure to do so made us fail to send log messages to
14316 the controller in 0.2.1.16-rc, slowed down controller event
14317 delivery in 0.2.7.3-rc and later, and crash with an assertion
14318 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14319 Patch and diagnosis from "Vort".
14322 Changes in version 0.3.0.12 - 2017-10-25
14323 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
14324 series, including a bugfix for a crash issue that had affected relays
14325 under memory pressure. It also adds a new directory authority, Bastet.
14327 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
14328 2018. If you need a release with long-term support, please stick with
14329 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
14331 o Directory authority changes:
14332 - Add "Bastet" as a ninth directory authority to the default list.
14333 Closes ticket 23910.
14334 - The directory authority "Longclaw" has changed its IP address.
14335 Closes ticket 23592.
14337 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14338 - Fix a timing-based assertion failure that could occur when the
14339 circuit out-of-memory handler freed a connection's output buffer.
14340 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14342 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14343 - Remove longclaw's IPv6 address, as it will soon change. Authority
14344 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14345 3/8 directory authorities with IPv6 addresses, but there are also
14346 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14348 o Minor features (geoip):
14349 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14352 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
14353 - When a directory authority rejects a descriptor or extrainfo with
14354 a given digest, mark that digest as undownloadable, so that we do
14355 not attempt to download it again over and over. We previously
14356 tried to avoid downloading such descriptors by other means, but we
14357 didn't notice if we accidentally downloaded one anyway. This
14358 behavior became problematic in 0.2.7.2-alpha, when authorities
14359 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14362 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14363 - Avoid a possible double close of a circuit by the intro point on
14364 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14365 bugfix on 0.3.0.1-alpha.
14367 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14368 - Clear the address when node_get_prim_orport() returns early.
14369 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14371 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
14372 - When running as a Windows service, set the ID of the main thread
14373 correctly. Failure to do so made us fail to send log messages to
14374 the controller in 0.2.1.16-rc, slowed down controller event
14375 delivery in 0.2.7.3-rc and later, and crash with an assertion
14376 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14377 Patch and diagnosis from "Vort".
14380 Changes in version 0.3.1.8 - 2017-10-25
14381 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
14382 It includes several bugfixes, including a bugfix for a crash issue
14383 that had affected relays under memory pressure. It also adds
14384 a new directory authority, Bastet.
14386 o Directory authority changes:
14387 - Add "Bastet" as a ninth directory authority to the default list.
14388 Closes ticket 23910.
14389 - The directory authority "Longclaw" has changed its IP address.
14390 Closes ticket 23592.
14392 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14393 - Fix a timing-based assertion failure that could occur when the
14394 circuit out-of-memory handler freed a connection's output buffer.
14395 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14397 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14398 - Remove longclaw's IPv6 address, as it will soon change. Authority
14399 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14400 3/8 directory authorities with IPv6 addresses, but there are also
14401 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14403 o Minor features (geoip):
14404 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14407 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
14408 - Fix a compilation warning when building with zstd support on
14409 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14410 and fixed by Andreas Stieger.
14412 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
14413 - Handle a pathological case when decompressing Zstandard data when
14414 the output buffer size is zero. Fixes bug 23551; bugfix
14417 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
14418 - Remove the length limit on HTTP status lines that authorities can
14419 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
14421 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14422 - Avoid a possible double close of a circuit by the intro point on
14423 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14424 bugfix on 0.3.0.1-alpha.
14426 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14427 - Clear the address when node_get_prim_orport() returns early.
14428 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14430 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
14431 - Fix additional channelpadding unit test failures by using mocked
14432 time instead of actual time for all tests. Fixes bug 23608; bugfix
14436 Changes in version 0.3.2.2-alpha - 2017-09-29
14437 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
14438 release fixes several minor bugs in the new scheduler and next-
14439 generation onion services; both features were newly added in the 0.3.2
14440 series. Other fixes in this alpha include several fixes for non-fatal
14441 tracebacks which would appear in logs.
14443 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
14444 alpha does not contain any substantial new features. Minor features
14445 include better testing and logging.
14447 The following comprises the complete list of changes included
14450 o Major bugfixes (relay, crash, assertion failure):
14451 - Fix a timing-based assertion failure that could occur when the
14452 circuit out-of-memory handler freed a connection's output buffer.
14453 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14455 o Major bugfixes (scheduler):
14456 - If a channel is put into the scheduler's pending list, then it
14457 starts closing, and then if the scheduler runs before it finishes
14458 closing, the scheduler will get stuck trying to flush its cells
14459 while the lower layers refuse to cooperate. Fix that race
14460 condition by giving the scheduler an escape method. Fixes bug
14461 23676; bugfix on 0.3.2.1-alpha.
14463 o Minor features (build, compilation):
14464 - The "check-changes" feature is now part of the "make check" tests;
14465 we'll use it to try to prevent misformed changes files from
14466 accumulating. Closes ticket 23564.
14467 - Tor builds should now fail if there are any mismatches between the
14468 C type representing a configuration variable and the C type the
14469 data-driven parser uses to store a value there. Previously, we
14470 needed to check these by hand, which sometimes led to mistakes.
14471 Closes ticket 23643.
14473 o Minor features (directory authorities):
14474 - Remove longclaw's IPv6 address, as it will soon change. Authority
14475 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14476 3/8 directory authorities with IPv6 addresses, but there are also
14477 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14479 o Minor features (hidden service, circuit, logging):
14480 - Improve logging of many callsite in the circuit subsystem to print
14481 the circuit identifier(s).
14482 - Log when we cleanup an intro point from a service so we know when
14483 and for what reason it happened. Closes ticket 23604.
14485 o Minor features (logging):
14486 - Log more circuit information whenever we are about to try to
14487 package a relay cell on a circuit with a nonexistent n_chan.
14488 Attempt to diagnose ticket 8185.
14489 - Improve info-level log identification of particular circuits, to
14490 help with debugging. Closes ticket 23645.
14492 o Minor features (relay):
14493 - When choosing which circuits can be expired as unused, consider
14494 circuits from clients even if those clients used regular CREATE
14495 cells to make them; and do not consider circuits from relays even
14496 if they were made with CREATE_FAST. Part of ticket 22805.
14498 o Minor features (robustness):
14499 - Change several fatal assertions when flushing buffers into non-
14500 fatal assertions, to prevent any recurrence of 23690.
14502 o Minor features (spec conformance, bridge, diagnostic):
14503 - When handling the USERADDR command on an ExtOrPort, warn when the
14504 transports provides a USERADDR with no port. In a future version,
14505 USERADDR commands of this format may be rejected. Detects problems
14506 related to ticket 23080.
14508 o Minor features (testing):
14509 - Add a unit test to make sure that our own generated platform
14510 string will be accepted by directory authorities. Closes
14513 o Minor bugfixes (bootstrapping):
14514 - When warning about state file clock skew, report the correct
14515 direction for the detected skew. Fixes bug 23606; bugfix
14517 - Avoid an assertion failure when logging a state file clock skew
14518 very early in bootstrapping. Fixes bug 23607; bugfix
14521 o Minor bugfixes (build, compilation):
14522 - Fix a compilation warning when building with zstd support on
14523 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14524 and fixed by Andreas Stieger.
14525 - When searching for OpenSSL, don't accept any OpenSSL library that
14526 lacks TLSv1_1_method(): Tor doesn't build with those versions.
14527 Additionally, look in /usr/local/opt/openssl, if it's present.
14528 These changes together repair the default build on OSX systems
14529 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
14531 o Minor bugfixes (compression):
14532 - Handle a pathological case when decompressing Zstandard data when
14533 the output buffer size is zero. Fixes bug 23551; bugfix
14536 o Minor bugfixes (documentation):
14537 - Fix manpage to not refer to the obsolete (and misspelled)
14538 UseEntryGuardsAsDirectoryGuards parameter in the description of
14539 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
14541 o Minor bugfixes (hidden service v3):
14542 - Don't log an assertion failure when we can't find the right
14543 information to extend to an introduction point. In rare cases,
14544 this could happen, causing a warning, even though tor would
14545 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
14546 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
14547 much bigger so the rendezvous point can't distinguish which hidden
14548 service protocol is being used. Fixes bug 23420; bugfix
14551 o Minor bugfixes (hidden service, relay):
14552 - Avoid a possible double close of a circuit by the intro point on
14553 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14554 bugfix on 0.3.0.1-alpha.
14556 o Minor bugfixes (logging, relay shutdown, annoyance):
14557 - When a circuit is marked for close, do not attempt to package any
14558 cells for channels on that circuit. Previously, we would detect
14559 this condition lower in the call stack, when we noticed that the
14560 circuit had no attached channel, and log an annoying message.
14561 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
14563 o Minor bugfixes (scheduler):
14564 - When switching schedulers due to a consensus change, we didn't
14565 give the new scheduler a chance to react to the consensus. Fix
14566 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
14567 - Make the KISTSchedRunInterval option a non negative value. With
14568 this, the way to disable KIST through the consensus is to set it
14569 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
14570 - Only notice log the selected scheduler when we switch scheduler
14571 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
14572 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
14573 by a different tv_usec data type. Fixes bug 23575; bugfix
14575 - Make a hard exit if tor is unable to pick a scheduler which can
14576 happen if the user specifies a scheduler type that is not
14577 supported and not other types in Schedulers. Fixes bug 23581;
14578 bugfix on 0.3.2.1-alpha.
14579 - Properly initialize the scheduler last run time counter so it is
14580 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
14582 o Minor bugfixes (testing):
14583 - Capture and detect several "Result does not fit" warnings in unit
14584 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
14586 - Fix additional channelpadding unit test failures by using mocked
14587 time instead of actual time for all tests. Fixes bug 23608; bugfix
14589 - The removal of some old scheduler options caused some tests to
14590 fail on BSD systems. Assume current behavior is correct and make
14591 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
14593 o Code simplification and refactoring:
14594 - Remove various ways of testing circuits and connections for
14595 "clientness"; instead, favor channel_is_client(). Part of
14598 o Deprecated features:
14599 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
14600 now deprecated; they do not apply to relays, and they have had no
14601 effect on clients since 0.2.8.x. Closes ticket 19704.
14604 - HiddenServiceVersion man page entry wasn't mentioning the now
14605 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
14606 - Clarify that the Address option is entirely about setting an
14607 advertised IPv4 address. Closes ticket 18891.
14608 - Clarify the manpage's use of the term "address" to clarify what
14609 kind of address is intended. Closes ticket 21405.
14610 - Document that onion service subdomains are allowed, and ignored.
14611 Closes ticket 18736.
14614 Changes in version 0.3.2.1-alpha - 2017-09-18
14615 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
14616 includes support for our next-generation ("v3") onion service
14617 protocol, and adds a new circuit scheduler for more responsive
14618 forwarding decisions from relays. There are also numerous other small
14619 features and bugfixes here.
14621 Below are the changes since Tor 0.3.1.7.
14623 o Major feature (scheduler, channel):
14624 - Tor now uses new schedulers to decide which circuits should
14625 deliver cells first, in order to improve congestion at relays. The
14626 first type is called "KIST" ("Kernel Informed Socket Transport"),
14627 and is only available on Linux-like systems: it uses feedback from
14628 the kernel to prevent the kernel's TCP buffers from growing too
14629 full. The second new scheduler type is called "KISTLite": it
14630 behaves the same as KIST, but runs on systems without kernel
14631 support for inspecting TCP implementation details. The old
14632 scheduler is still available, under the name "Vanilla". To change
14633 the default scheduler preference order, use the new "Schedulers"
14634 option. (The default preference order is "KIST,KISTLite,Vanilla".)
14636 Matt Traudt implemented KIST, based on research by Rob Jansen,
14637 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
14638 more information, see the design paper at
14639 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
14640 followup implementation paper at https://arxiv.org/abs/1709.01044.
14641 Closes ticket 12541.
14643 o Major features (next-generation onion services):
14644 - Tor now supports the next-generation onion services protocol for
14645 clients and services! As part of this release, the core of
14646 proposal 224 has been implemented and is available for
14647 experimentation and testing by our users. This newer version of
14648 onion services ("v3") features many improvements over the legacy
14651 a) Better crypto (replaced SHA1/DH/RSA1024
14652 with SHA3/ed25519/curve25519)
14654 b) Improved directory protocol, leaking much less information to
14657 c) Improved directory protocol, with smaller surface for
14660 d) Better onion address security against impersonation.
14662 e) More extensible introduction/rendezvous protocol.
14664 f) A cleaner and more modular codebase.
14666 You can identify a next-generation onion address by its length:
14667 they are 56 characters long, as in
14668 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
14670 In the future, we will release more options and features for v3
14671 onion services, but we first need a testing period, so that the
14672 current codebase matures and becomes more robust. Planned features
14673 include: offline keys, advanced client authorization, improved
14674 guard algorithms, and statistics. For full details, see
14677 Legacy ("v2") onion services will still work for the foreseeable
14678 future, and will remain the default until this new codebase gets
14679 tested and hardened. Service operators who want to experiment with
14680 the new system can use the 'HiddenServiceVersion 3' torrc
14681 directive along with the regular onion service configuration
14682 options. We will publish a blog post about this new feature
14685 o Major bugfixes (usability, control port):
14686 - Report trusted clock skew indications as bootstrap errors, so
14687 controllers can more easily alert users when their clocks are
14688 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
14690 o Minor features (bug detection):
14691 - Log a warning message with a stack trace for any attempt to call
14692 get_options() during option validation. This pattern has caused
14693 subtle bugs in the past. Closes ticket 22281.
14695 o Minor features (client):
14696 - You can now use Tor as a tunneled HTTP proxy: use the new
14697 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
14698 requests. Closes ticket 22407.
14699 - Add an extra check to make sure that we always use the newer guard
14700 selection code for picking our guards. Closes ticket 22779.
14701 - When downloading (micro)descriptors, don't split the list into
14702 multiple requests unless we want at least 32 descriptors.
14703 Previously, we split at 4, not 32, which led to significant
14704 overhead in HTTP request size and degradation in compression
14705 performance. Closes ticket 23220.
14707 o Minor features (command line):
14708 - Add a new commandline option, --key-expiration, which prints when
14709 the current signing key is going to expire. Implements ticket
14710 17639; patch by Isis Lovecruft.
14712 o Minor features (control port):
14713 - If an application tries to use the control port as an HTTP proxy,
14714 respond with a meaningful "This is the Tor control port" message,
14715 and log the event. Closes ticket 1667. Patch from Ravi
14717 - Provide better error message for GETINFO desc/(id|name) when not
14718 fetching router descriptors. Closes ticket 5847. Patch by
14720 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
14721 whether Tor will try to download router descriptors and
14722 microdescriptors respectively. Closes ticket 22684.
14723 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
14724 so controllers can tell whether the geoip databases are loaded.
14725 Closes ticket 23237.
14726 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
14727 events. Closes ticket 19254. Patch by "DonnchaC".
14729 o Minor features (development support):
14730 - Developers can now generate a call-graph for Tor using the
14731 "calltool" python program, which post-processes object dumps. It
14732 should work okay on many Linux and OSX platforms, and might work
14733 elsewhere too. To run it, install calltool from
14734 https://gitweb.torproject.org/user/nickm/calltool.git and run
14735 "make callgraph". Closes ticket 19307.
14737 o Minor features (ed25519):
14738 - Add validation function to checks for torsion components in
14739 ed25519 public keys, used by prop224 client-side code. Closes
14740 ticket 22006. Math help by Ian Goldberg.
14742 o Minor features (exit relay, DNS):
14743 - Improve the clarity and safety of the log message from evdns when
14744 receiving an apparently spoofed DNS reply. Closes ticket 3056.
14746 o Minor features (integration, hardening):
14747 - Add a new NoExec option to prevent Tor from running other
14748 programs. When this option is set to 1, Tor will never try to run
14749 another program, regardless of the settings of
14750 PortForwardingHelper, ClientTransportPlugin, or
14751 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
14752 without restarting Tor. Closes ticket 22976.
14754 o Minor features (logging):
14755 - Improve the warning message for specifying a relay by nickname.
14756 The previous message implied that nickname registration was still
14757 part of the Tor network design, which it isn't. Closes
14759 - If the sandbox filter fails to load, suggest to the user that
14760 their kernel might not support seccomp2. Closes ticket 23090.
14762 o Minor features (portability):
14763 - Check at configure time whether uint8_t is the same type as
14764 unsigned char. Lots of existing code already makes this
14765 assumption, and there could be strict aliasing issues if the
14766 assumption is violated. Closes ticket 22410.
14768 o Minor features (relay, configuration):
14769 - Reject attempts to use relative file paths when RunAsDaemon is
14770 set. Previously, Tor would accept these, but the directory-
14771 changing step of RunAsDaemon would give strange and/or confusing
14772 results. Closes ticket 22731.
14774 o Minor features (startup, safety):
14775 - When configured to write a PID file, Tor now exits if it is unable
14776 to do so. Previously, it would warn and continue. Closes
14779 o Minor features (static analysis):
14780 - The BUG() macro has been changed slightly so that Coverity no
14781 longer complains about dead code if the bug is impossible. Closes
14784 o Minor features (testing):
14785 - The default chutney network tests now include tests for the v3
14786 hidden service design. Make sure you have the latest version of
14787 chutney if you want to run these. Closes ticket 22437.
14788 - Add a unit test to verify that we can parse a hardcoded v2 hidden
14789 service descriptor. Closes ticket 15554.
14791 o Minor bugfixes (certificate handling):
14792 - Fix a time handling bug in Tor certificates set to expire after
14793 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
14794 Coverity as CID 1415728.
14796 o Minor bugfixes (client, usability):
14797 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
14798 SOCKS4a requests that contain IP address strings, even when
14799 SafeSocks in enabled, as this prevents user from connecting to
14800 known IP addresses without relying on DNS for resolving. SafeSocks
14801 still rejects SOCKS connections that connect to IP addresses when
14802 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
14803 bugfix on Tor 0.2.6.2-alpha.
14805 o Minor bugfixes (code correctness):
14806 - Call htons() in extend_cell_format() for encoding a 16-bit value.
14807 Previously we used ntohs(), which happens to behave the same on
14808 all the platforms we support, but which isn't really correct.
14809 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
14810 - For defense-in-depth, make the controller's write_escaped_data()
14811 function robust to extremely long inputs. Fixes bug 19281; bugfix
14812 on 0.1.1.1-alpha. Reported by Guido Vranken.
14814 o Minor bugfixes (compilation):
14815 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
14816 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
14818 o Minor bugfixes (consensus expiry):
14819 - Check for adequate directory information correctly. Previously, Tor
14820 would reconsider whether it had sufficient directory information
14821 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
14823 o Minor bugfixes (directory protocol):
14824 - Directory servers now include a "Date:" http header for response
14825 codes other than 200. Clients starting with a skewed clock and a
14826 recent consensus were getting "304 Not modified" responses from
14827 directory authorities, so without the Date header, the client
14828 would never hear about a wrong clock. Fixes bug 23499; bugfix
14830 - Make clients wait for 6 seconds before trying to download a
14831 consensus from an authority. Fixes bug 17750; bugfix
14834 o Minor bugfixes (DoS-resistance):
14835 - If future code asks if there are any running bridges, without
14836 checking if bridges are enabled, log a BUG warning rather than
14837 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
14839 o Minor bugfixes (format strictness):
14840 - Restrict several data formats to decimal. Previously, the
14841 BuildTimeHistogram entries in the state file, the "bw=" entries in
14842 the bandwidth authority file, and the process IDs passed to the
14843 __OwningControllerProcess option could all be specified in hex or
14844 octal as well as in decimal. This was not an intentional feature.
14845 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
14848 o Minor bugfixes (heartbeat):
14849 - If we fail to write a heartbeat message, schedule a retry for the
14850 minimum heartbeat interval number of seconds in the future. Fixes
14851 bug 19476; bugfix on 0.2.3.1-alpha.
14853 o Minor bugfixes (linux seccomp2 sandbox, logging):
14854 - Fix some messages on unexpected errors from the seccomp2 library.
14855 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
14857 o Minor bugfixes (logging):
14858 - Remove duplicate log messages regarding opening non-local
14859 SocksPorts upon parsing config and opening listeners at startup.
14860 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
14861 - Use a more comprehensible log message when telling the user
14862 they've excluded every running exit node. Fixes bug 7890; bugfix
14864 - When logging the number of descriptors we intend to download per
14865 directory request, do not log a number higher than then the number
14866 of descriptors we're fetching in total. Fixes bug 19648; bugfix
14868 - When warning about a directory owned by the wrong user, log the
14869 actual name of the user owning the directory. Previously, we'd log
14870 the name of the process owner twice. Fixes bug 23487; bugfix
14872 - The tor specification says hop counts are 1-based, so fix two log
14873 messages that mistakenly logged 0-based hop counts. Fixes bug
14874 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
14875 Credit to Xiaofan Li for reporting this issue.
14877 o Minor bugfixes (portability):
14878 - Stop using the PATH_MAX variable, which is not defined on GNU
14879 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
14881 o Minor bugfixes (relay):
14882 - When uploading our descriptor for the first time after startup,
14883 report the reason for uploading as "Tor just started" rather than
14884 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
14885 - Avoid unnecessary calls to directory_fetches_from_authorities() on
14886 relays, to prevent spurious address resolutions and descriptor
14887 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
14888 bugfix on in 0.2.8.1-alpha.
14890 o Minor bugfixes (tests):
14891 - Fix a broken unit test for the OutboundAddress option: the parsing
14892 function was never returning an error on failure. Fixes bug 23366;
14893 bugfix on 0.3.0.3-alpha.
14894 - Fix a signed-integer overflow in the unit tests for
14895 dir/download_status_random_backoff, which was untriggered until we
14896 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
14898 o Minor bugfixes (usability, control port):
14899 - Stop making an unnecessary routerlist check in NETINFO clock skew
14900 detection; this was preventing clients from reporting NETINFO clock
14901 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
14903 o Code simplification and refactoring:
14904 - Extract the code for handling newly-open channels into a separate
14905 function from the general code to handle channel state
14906 transitions. This change simplifies our callgraph, reducing the
14907 size of the largest strongly connected component by roughly a
14908 factor of two. Closes ticket 22608.
14909 - Remove dead code for largely unused statistics on the number of
14910 times we've attempted various public key operations. Fixes bug
14911 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
14912 - Remove several now-obsolete functions for asking about old
14913 variants directory authority status. Closes ticket 22311; patch
14915 - Remove some of the code that once supported "Named" and "Unnamed"
14916 routers. Authorities no longer vote for these flags. Closes
14918 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
14919 and old hidden services, to indicate that they aren't suitable for
14920 new protocols or formats. Closes ticket 23026.
14921 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
14922 22521. Patch from Neel Chauhan.
14923 - Split the enormous circuit_send_next_onion_skin() function into
14924 multiple subfunctions. Closes ticket 22804.
14925 - Split the portions of the buffer.c module that handle particular
14926 protocols into separate modules. Part of ticket 23149.
14927 - Use our test macros more consistently, to produce more useful
14928 error messages when our unit tests fail. Add coccinelle patches to
14929 allow us to re-check for test macro uses. Closes ticket 22497.
14931 o Deprecated features:
14932 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
14933 only applies to direct unencrypted HTTP connections to your
14934 directory server, which your Tor probably isn't using. Closes
14938 - Clarify in the manual that "Sandbox 1" is only supported on Linux
14939 kernels. Closes ticket 22677.
14940 - Document all values of PublishServerDescriptor in the manpage.
14941 Closes ticket 15645.
14942 - Improve the documentation for the directory port part of the
14943 DirAuthority line. Closes ticket 20152.
14944 - Restore documentation for the authorities' "approved-routers"
14945 file. Closes ticket 21148.
14947 o Removed features:
14948 - The AllowDotExit option has been removed as unsafe. It has been
14949 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
14950 - The ClientDNSRejectInternalAddresses flag can no longer be set on
14951 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
14952 Closes ticket 21031.
14953 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
14954 nobody was using it any longer. Closes ticket 22377.
14957 Changes in version 0.2.8.15 - 2017-09-18
14958 Tor 0.2.8.15 backports a collection of bugfixes from later
14961 Most significantly, it includes a fix for TROVE-2017-008, a
14962 security bug that affects hidden services running with the
14963 SafeLogging option disabled. For more information, see
14964 https://trac.torproject.org/projects/tor/ticket/23490
14966 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
14967 2018. We suggest that you upgrade to the latest stable release if
14968 possible. If you can't, we recommend that you upgrade at least to
14969 0.2.9, which will be supported until 2020.
14971 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14972 - Avoid an assertion failure bug affecting our implementation of
14973 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14974 handling of "0xx" differs from what we had expected. Fixes bug
14975 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14978 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14981 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14982 - Backport a fix for an "unused variable" warning that appeared
14983 in some versions of mingw. Fixes bug 22838; bugfix on
14986 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14987 - Fix a memset() off the end of an array when packing cells. This
14988 bug should be harmless in practice, since the corrupted bytes are
14989 still in the same structure, and are always padding bytes,
14990 ignored, or immediately overwritten, depending on compiler
14991 behavior. Nevertheless, because the memset()'s purpose is to make
14992 sure that any other cell-handling bugs can't expose bytes to the
14993 network, we need to fix it. Fixes bug 22737; bugfix on
14994 0.2.4.11-alpha. Fixes CID 1401591.
14996 o Build features (backport from 0.3.1.5-alpha):
14997 - Tor's repository now includes a Travis Continuous Integration (CI)
14998 configuration file (.travis.yml). This is meant to help new
14999 developers and contributors who fork Tor to a Github repository be
15000 better able to test their changes, and understand what we expect
15001 to pass. To use this new build feature, you must fork Tor to your
15002 Github account, then go into the "Integrations" menu in the
15003 repository settings for your fork and enable Travis, then push
15004 your changes. Closes ticket 22636.
15007 Changes in version 0.2.9.12 - 2017-09-18
15008 Tor 0.2.9.12 backports a collection of bugfixes from later
15011 Most significantly, it includes a fix for TROVE-2017-008, a
15012 security bug that affects hidden services running with the
15013 SafeLogging option disabled. For more information, see
15014 https://trac.torproject.org/projects/tor/ticket/23490
15016 o Major features (security, backport from 0.3.0.2-alpha):
15017 - Change the algorithm used to decide DNS TTLs on client and server
15018 side, to better resist DNS-based correlation attacks like the
15019 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
15020 Feamster. Now relays only return one of two possible DNS TTL
15021 values, and clients are willing to believe DNS TTL values up to 3
15022 hours long. Closes ticket 19769.
15024 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
15025 - Fix a rare crash when sending a begin cell on a circuit whose
15026 linked directory connection had already been closed. Fixes bug
15027 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
15029 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
15030 - Fix a bug that prevented exit nodes from caching DNS records for
15031 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
15033 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
15034 - Fix a typo that had prevented TPROXY-based transparent proxying
15035 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15036 Patch from "d4fq0fQAgoJ".
15038 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
15039 - Avoid an assertion failure bug affecting our implementation of
15040 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15041 handling of "0xx" differs from what we had expected. Fixes bug
15042 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15044 o Minor features (code style, backport from 0.3.1.3-alpha):
15045 - Add "Falls through" comments to our codebase, in order to silence
15046 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15047 Stieger. Closes ticket 22446.
15049 o Minor features (geoip):
15050 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
15053 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
15054 - Roll over monthly accounting at the configured hour and minute,
15055 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15056 Found by Andrey Karpov with PVS-Studio.
15058 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
15059 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
15060 bugfix on 0.2.8.1-alpha.
15061 - Fix warnings when building with libscrypt and openssl scrypt support
15062 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15063 - When building with certain versions the mingw C header files, avoid
15064 float-conversion warnings when calling the C functions isfinite(),
15065 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
15067 o Minor bugfixes (compilation, backport from 0.3.1.7):
15068 - Avoid compiler warnings in the unit tests for running tor_sscanf()
15069 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
15071 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
15072 - Backport a fix for an "unused variable" warning that appeared
15073 in some versions of mingw. Fixes bug 22838; bugfix on
15076 o Minor bugfixes (controller, backport from 0.3.1.7):
15077 - Do not crash when receiving a HSPOST command with an empty body.
15078 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
15079 - Do not crash when receiving a POSTDESCRIPTOR command with an
15080 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
15082 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
15083 - Avoid Coverity build warnings related to our BUG() macro. By
15084 default, Coverity treats BUG() as the Linux kernel does: an
15085 instant abort(). We need to override that so our BUG() macro
15086 doesn't prevent Coverity from analyzing functions that use it.
15087 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15089 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
15090 - Fix a memset() off the end of an array when packing cells. This
15091 bug should be harmless in practice, since the corrupted bytes are
15092 still in the same structure, and are always padding bytes,
15093 ignored, or immediately overwritten, depending on compiler
15094 behavior. Nevertheless, because the memset()'s purpose is to make
15095 sure that any other cell-handling bugs can't expose bytes to the
15096 network, we need to fix it. Fixes bug 22737; bugfix on
15097 0.2.4.11-alpha. Fixes CID 1401591.
15099 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
15100 - When setting the maximum number of connections allowed by the OS,
15101 always allow some extra file descriptors for other files. Fixes
15102 bug 22797; bugfix on 0.2.0.10-alpha.
15104 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
15105 - Avoid a sandbox failure when trying to re-bind to a socket and
15106 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15108 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15109 - Permit the fchmod system call, to avoid crashing on startup when
15110 starting with the seccomp2 sandbox and an unexpected set of
15111 permissions on the data directory or its contents. Fixes bug
15112 22516; bugfix on 0.2.5.4-alpha.
15114 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
15115 - Avoid a double-marked-circuit warning that could happen when we
15116 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
15119 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15120 - Reject version numbers with non-numeric prefixes (such as +, -, or
15121 whitespace). Disallowing whitespace prevents differential version
15122 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15123 and part of 21508; bugfix on 0.0.8pre1.
15125 o Build features (backport from 0.3.1.5-alpha):
15126 - Tor's repository now includes a Travis Continuous Integration (CI)
15127 configuration file (.travis.yml). This is meant to help new
15128 developers and contributors who fork Tor to a Github repository be
15129 better able to test their changes, and understand what we expect
15130 to pass. To use this new build feature, you must fork Tor to your
15131 Github account, then go into the "Integrations" menu in the
15132 repository settings for your fork and enable Travis, then push
15133 your changes. Closes ticket 22636.
15136 Changes in version 0.3.0.11 - 2017-09-18
15137 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
15140 Most significantly, it includes a fix for TROVE-2017-008, a
15141 security bug that affects hidden services running with the
15142 SafeLogging option disabled. For more information, see
15143 https://trac.torproject.org/projects/tor/ticket/23490
15145 o Minor features (code style, backport from 0.3.1.7):
15146 - Add "Falls through" comments to our codebase, in order to silence
15147 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15148 Stieger. Closes ticket 22446.
15151 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
15154 o Minor bugfixes (compilation, backport from 0.3.1.7):
15155 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
15156 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
15158 o Minor bugfixes (controller, backport from 0.3.1.7):
15159 - Do not crash when receiving a HSPOST command with an empty body.
15160 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
15161 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
15162 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
15164 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
15165 - When setting the maximum number of connections allowed by the OS,
15166 always allow some extra file descriptors for other files. Fixes
15167 bug 22797; bugfix on 0.2.0.10-alpha.
15169 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
15170 - Remove a forgotten debugging message when an introduction point
15171 successfully establishes a hidden service prop224 circuit with
15173 - Change three other log_warn() for an introduction point to
15174 protocol warnings, because they can be failure from the network
15175 and are not relevant to the operator. Fixes bug 23078; bugfix on
15176 0.3.0.1-alpha and 0.3.0.2-alpha.
15179 Changes in version 0.3.1.7 - 2017-09-18
15180 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
15182 With the 0.3.1 series, Tor now serves and downloads directory
15183 information in more compact formats, to save on bandwidth overhead. It
15184 also contains a new padding system to resist netflow-based traffic
15185 analysis, and experimental support for building parts of Tor in Rust
15186 (though no parts of Tor are in Rust yet). There are also numerous
15187 small features, bugfixes on earlier release series, and groundwork for
15188 the hidden services revamp of 0.3.2.
15190 This release also includes a fix for TROVE-2017-008, a security bug
15191 that affects hidden services running with the SafeLogging option
15192 disabled. For more information, see
15193 https://trac.torproject.org/projects/tor/ticket/23490
15195 Per our stable release policy, we plan to support each stable release
15196 series for at least the next nine months, or for three months after
15197 the first stable release of the next series: whichever is longer. If
15198 you need a release with long-term support, we recommend that you stay
15199 with the 0.2.9 series.
15201 Below is a list of the changes since 0.3.1.6-rc. For a list of all
15202 changes since 0.3.0, see the ReleaseNotes file.
15204 o Major bugfixes (security, hidden services, loggging):
15205 - Fix a bug where we could log uninitialized stack when a certain
15206 hidden service error occurred while SafeLogging was disabled.
15207 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
15208 TROVE-2017-008 and CVE-2017-0380.
15210 o Minor features (defensive programming):
15211 - Create a pair of consensus parameters, nf_pad_tor2web and
15212 nf_pad_single_onion, to disable netflow padding in the consensus
15213 for non-anonymous connections in case the overhead is high. Closes
15216 o Minor features (diagnostic):
15217 - Add a stack trace to the bug warnings that can be logged when
15218 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
15219 attempt for bug 23105.
15221 o Minor features (geoip):
15222 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
15225 o Minor bugfixes (compilation):
15226 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
15227 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
15229 o Minor bugfixes (controller):
15230 - Do not crash when receiving a HSPOST command with an empty body.
15231 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
15232 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
15233 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
15235 o Minor bugfixes (relay):
15236 - Inform the geoip and rephist modules about all requests, even on
15237 relays that are only fetching microdescriptors. Fixes a bug
15238 related to 21585; bugfix on 0.3.0.1-alpha.
15240 o Minor bugfixes (unit tests):
15241 - Fix a channelpadding unit test failure on slow systems by using
15242 mocked time instead of actual time. Fixes bug 23077; bugfix
15246 Changes in version 0.3.1.6-rc - 2017-09-05
15247 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
15248 release series, including a bug that produced weird behavior on
15249 Windows directory caches.
15251 This is the first release candidate in the Tor 0.3.1 series. If we
15252 find no new bugs or regressions here, the first stable 0.3.1 release
15253 will be nearly identical to it.
15255 o Major bugfixes (windows, directory cache):
15256 - On Windows, do not try to delete cached consensus documents and
15257 diffs before they are unmapped from memory--Windows won't allow
15258 that. Instead, allow the consensus cache directory to grow larger,
15259 to hold files that might need to stay around longer. Fixes bug
15260 22752; bugfix on 0.3.1.1-alpha.
15262 o Minor features (directory authority):
15263 - Improve the message that authorities report to relays that present
15264 RSA/Ed25519 keypairs that conflict with previously pinned keys.
15265 Closes ticket 22348.
15267 o Minor features (geoip):
15268 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
15271 o Minor features (testing):
15272 - Add more tests for compression backend initialization. Closes
15275 o Minor bugfixes (directory cache):
15276 - Fix a memory leak when recovering space in the consensus cache.
15277 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
15279 o Minor bugfixes (hidden service):
15280 - Increase the number of circuits that a service is allowed to
15281 open over a specific period of time. The value was lower than it
15282 should be (8 vs 12) in the normal case of 3 introduction points.
15283 Fixes bug 22159; bugfix on 0.3.0.5-rc.
15284 - Fix a BUG warning during HSv3 descriptor decoding that could be
15285 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
15286 on 0.3.0.1-alpha. Bug found by "haxxpop".
15287 - Rate-limit the log messages if we exceed the maximum number of
15288 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
15290 o Minor bugfixes (logging, relay):
15291 - Remove a forgotten debugging message when an introduction point
15292 successfully establishes a hidden service prop224 circuit with
15294 - Change three other log_warn() for an introduction point to
15295 protocol warnings, because they can be failure from the network
15296 and are not relevant to the operator. Fixes bug 23078; bugfix on
15297 0.3.0.1-alpha and 0.3.0.2-alpha.
15299 o Minor bugfixes (relay):
15300 - When a relay is not running as a directory cache, it will no
15301 longer generate compressed consensuses and consensus diff
15302 information. Previously, this was a waste of disk and CPU. Fixes
15303 bug 23275; bugfix on 0.3.1.1-alpha.
15305 o Minor bugfixes (robustness, error handling):
15306 - Improve our handling of the cases where OpenSSL encounters a
15307 memory error while encoding keys and certificates. We haven't
15308 observed these errors in the wild, but if they do happen, we now
15309 detect and respond better. Fixes bug 19418; bugfix on all versions
15310 of Tor. Reported by Guido Vranken.
15312 o Minor bugfixes (stability):
15313 - Avoid crashing on a double-free when unable to load or process an
15314 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
15315 with the clang static analyzer.
15317 o Minor bugfixes (testing):
15318 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
15319 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
15320 - Port the hs_ntor handshake test to work correctly with recent
15321 versions of the pysha3 module. Fixes bug 23071; bugfix
15324 o Minor bugfixes (Windows service):
15325 - When running as a Windows service, set the ID of the main thread
15326 correctly. Failure to do so made us fail to send log messages to
15327 the controller in 0.2.1.16-rc, slowed down controller event
15328 delivery in 0.2.7.3-rc and later, and crash with an assertion
15329 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
15330 Patch and diagnosis from "Vort".
15333 Changes in version 0.3.0.10 - 2017-08-02
15334 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
15335 from the current Tor alpha series. OpenBSD users and TPROXY users
15336 should upgrade; others are probably okay sticking with 0.3.0.9.
15338 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
15339 - Tor's repository now includes a Travis Continuous Integration (CI)
15340 configuration file (.travis.yml). This is meant to help new
15341 developers and contributors who fork Tor to a Github repository be
15342 better able to test their changes, and understand what we expect
15343 to pass. To use this new build feature, you must fork Tor to your
15344 Github account, then go into the "Integrations" menu in the
15345 repository settings for your fork and enable Travis, then push
15346 your changes. Closes ticket 22636.
15348 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
15349 - Fix a typo that had prevented TPROXY-based transparent proxying
15350 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15351 Patch from "d4fq0fQAgoJ".
15353 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
15354 - Avoid an assertion failure bug affecting our implementation of
15355 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15356 handling of "0xbar" differs from what we had expected. Fixes bug
15357 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15359 o Minor features (backport from 0.3.1.5-alpha):
15360 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15363 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
15364 - Roll over monthly accounting at the configured hour and minute,
15365 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15366 Found by Andrey Karpov with PVS-Studio.
15368 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
15369 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
15370 bugfix on 0.2.8.1-alpha.
15371 - Fix warnings when building with libscrypt and openssl scrypt
15372 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15373 - When building with certain versions of the mingw C header files,
15374 avoid float-conversion warnings when calling the C functions
15375 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15378 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
15379 - Backport a fix for an "unused variable" warning that appeared
15380 in some versions of mingw. Fixes bug 22838; bugfix on
15383 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
15384 - Avoid Coverity build warnings related to our BUG() macro. By
15385 default, Coverity treats BUG() as the Linux kernel does: an
15386 instant abort(). We need to override that so our BUG() macro
15387 doesn't prevent Coverity from analyzing functions that use it.
15388 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15390 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
15391 - When rejecting a router descriptor for running an obsolete version
15392 of Tor without ntor support, warn about the obsolete tor version,
15393 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15395 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
15396 - Avoid a sandbox failure when trying to re-bind to a socket and
15397 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15399 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
15400 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15401 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15404 Changes in version 0.3.1.5-alpha - 2017-08-01
15405 Tor 0.3.1.5-alpha improves the performance of consensus diff
15406 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
15407 several other bugs. If no serious bugs are found in this version, the
15408 next version will be a release candidate.
15410 This release also marks the end of support for the Tor 0.2.4.x,
15411 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
15412 further bug or security fixes. Anyone still running or distributing
15413 one of those versions should upgrade.
15415 o Major features (build system, continuous integration):
15416 - Tor's repository now includes a Travis Continuous Integration (CI)
15417 configuration file (.travis.yml). This is meant to help new
15418 developers and contributors who fork Tor to a Github repository be
15419 better able to test their changes, and understand what we expect
15420 to pass. To use this new build feature, you must fork Tor to your
15421 Github account, then go into the "Integrations" menu in the
15422 repository settings for your fork and enable Travis, then push
15423 your changes. Closes ticket 22636.
15425 o Major bugfixes (openbsd, denial-of-service):
15426 - Avoid an assertion failure bug affecting our implementation of
15427 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15428 handling of "0xbar" differs from what we had expected. Fixes bug
15429 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15431 o Major bugfixes (relay, performance):
15432 - Perform circuit handshake operations at a higher priority than we
15433 use for consensus diff creation and compression. This should
15434 prevent circuits from starving when a relay or bridge receives a
15435 new consensus, especially on lower-powered machines. Fixes bug
15436 22883; bugfix on 0.3.1.1-alpha.
15438 o Minor features (bridge authority):
15439 - Add "fingerprint" lines to the networkstatus-bridges file produced
15440 by bridge authorities. Closes ticket 22207.
15442 o Minor features (directory cache, consensus diff):
15443 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
15444 operators with low-resource environments to adjust the number of
15445 consensuses they'll store and generate diffs from. Most cache
15446 operators should leave it unchanged. Helps to work around
15449 o Minor features (geoip):
15450 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15453 o Minor features (relay, performance):
15454 - Always start relays with at least two worker threads, to prevent
15455 priority inversion on slow tasks. Part of the fix for bug 22883.
15456 - Allow background work to be queued with different priorities, so
15457 that a big pile of slow low-priority jobs will not starve out
15458 higher priority jobs. This lays the groundwork for a fix for
15461 o Minor bugfixes (build system, rust):
15462 - Fix a problem where Rust toolchains were not being found when
15463 building without --enable-cargo-online-mode, due to setting the
15464 $HOME environment variable instead of $CARGO_HOME. Fixes bug
15465 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
15467 o Minor bugfixes (compatibility, zstd):
15468 - Write zstd epilogues correctly when the epilogue requires
15469 reallocation of the output buffer, even with zstd 1.3.0.
15470 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
15471 22927; bugfix on 0.3.1.1-alpha.
15473 o Minor bugfixes (compilation warnings):
15474 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
15475 22915; bugfix on 0.2.8.1-alpha.
15476 - Fix warnings when building with libscrypt and openssl scrypt
15477 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15478 - Compile correctly when both openssl 1.1.0 and libscrypt are
15479 detected. Previously this would cause an error. Fixes bug 22892;
15480 bugfix on 0.3.1.1-alpha.
15481 - When building with certain versions of the mingw C header files,
15482 avoid float-conversion warnings when calling the C functions
15483 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15486 o Minor bugfixes (coverity build support):
15487 - Avoid Coverity build warnings related to our BUG() macro. By
15488 default, Coverity treats BUG() as the Linux kernel does: an
15489 instant abort(). We need to override that so our BUG() macro
15490 doesn't prevent Coverity from analyzing functions that use it.
15491 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15493 o Minor bugfixes (directory authority):
15494 - When a directory authority rejects a descriptor or extrainfo with
15495 a given digest, mark that digest as undownloadable, so that we do
15496 not attempt to download it again over and over. We previously
15497 tried to avoid downloading such descriptors by other means, but we
15498 didn't notice if we accidentally downloaded one anyway. This
15499 behavior became problematic in 0.2.7.2-alpha, when authorities
15500 began pinning Ed25519 keys. Fixes bug 22349; bugfix
15503 o Minor bugfixes (error reporting, windows):
15504 - When formatting Windows error messages, use the English format to
15505 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
15508 o Minor bugfixes (file limits, osx):
15509 - When setting the maximum number of connections allowed by the OS,
15510 always allow some extra file descriptors for other files. Fixes
15511 bug 22797; bugfix on 0.2.0.10-alpha.
15513 o Minor bugfixes (linux seccomp2 sandbox):
15514 - Avoid a sandbox failure when trying to re-bind to a socket and
15515 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15517 o Minor bugfixes (memory leaks):
15518 - Fix a small memory leak when validating a configuration that uses
15519 two or more AF_UNIX sockets for the same port type. Fixes bug
15520 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
15522 o Minor bugfixes (unit tests):
15523 - test_consdiff_base64cmp would fail on OS X because while OS X
15524 follows the standard of (less than zero/zero/greater than zero),
15525 it doesn't follow the convention of (-1/0/+1). Make the test
15526 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
15527 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15528 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15531 Changes in version 0.3.1.4-alpha - 2017-06-29
15532 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
15533 to use a guard that was in the same network family as a chosen exit
15534 relay. This is a security regression; all clients running earlier
15535 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
15538 This release also fixes several other bugs introduced in 0.3.0.x
15539 and 0.3.1.x, including others that can affect bandwidth usage
15542 o New dependencies:
15543 - To build with zstd and lzma support, Tor now requires the
15544 pkg-config tool at build time. (This requirement was new in
15545 0.3.1.1-alpha, but was not noted at the time. Noting it here to
15546 close ticket 22623.)
15548 o Major bugfixes (path selection, security):
15549 - When choosing which guard to use for a circuit, avoid the exit's
15550 family along with the exit itself. Previously, the new guard
15551 selection logic avoided the exit, but did not consider its family.
15552 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15553 006 and CVE-2017-0377.
15555 o Major bugfixes (compression, zstd):
15556 - Correctly detect a full buffer when decompressing a large zstd-
15557 compressed input. Previously, we would sometimes treat a full
15558 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
15560 o Major bugfixes (directory protocol):
15561 - Ensure that we send "304 Not modified" as HTTP status code when a
15562 client is attempting to fetch a consensus or consensus diff, and
15563 the best one we can send them is one they already have. Fixes bug
15564 22702; bugfix on 0.3.1.1-alpha.
15566 o Major bugfixes (entry guards):
15567 - When starting with an old consensus, do not add new entry guards
15568 unless the consensus is "reasonably live" (under 1 day old). Fixes
15569 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15571 o Minor features (bug mitigation, diagnostics, logging):
15572 - Avoid an assertion failure, and log a better error message, when
15573 unable to remove a file from the consensus cache on Windows.
15574 Attempts to mitigate and diagnose bug 22752.
15576 o Minor features (geoip):
15577 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15580 o Minor bugfixes (compression):
15581 - When compressing or decompressing a buffer, check for a failure to
15582 create a compression object. Fixes bug 22626; bugfix
15584 - When decompressing a buffer, check for extra data after the end of
15585 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
15586 - When decompressing an object received over an anonymous directory
15587 connection, if we have already decompressed it using an acceptable
15588 compression method, do not reject it for looking like an
15589 unacceptable compression method. Fixes part of bug 22670; bugfix
15591 - When serving directory votes compressed with zlib, do not claim to
15592 have compressed them with zstd. Fixes bug 22669; bugfix
15594 - When spooling compressed data to an output buffer, don't try to
15595 spool more data when there is no more data to spool and we are not
15596 trying to flush the input. Previously, we would sometimes launch
15597 compression requests with nothing to do, which interferes with our
15598 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
15600 o Minor bugfixes (defensive programming):
15601 - Detect and break out of infinite loops in our compression code. We
15602 don't think that any such loops exist now, but it's best to be
15603 safe. Closes ticket 22672.
15604 - Fix a memset() off the end of an array when packing cells. This
15605 bug should be harmless in practice, since the corrupted bytes are
15606 still in the same structure, and are always padding bytes,
15607 ignored, or immediately overwritten, depending on compiler
15608 behavior. Nevertheless, because the memset()'s purpose is to make
15609 sure that any other cell-handling bugs can't expose bytes to the
15610 network, we need to fix it. Fixes bug 22737; bugfix on
15611 0.2.4.11-alpha. Fixes CID 1401591.
15613 o Minor bugfixes (linux seccomp2 sandbox):
15614 - Permit the fchmod system call, to avoid crashing on startup when
15615 starting with the seccomp2 sandbox and an unexpected set of
15616 permissions on the data directory or its contents. Fixes bug
15617 22516; bugfix on 0.2.5.4-alpha.
15618 - Fix a crash in the LZMA module, when the sandbox was enabled, and
15619 liblzma would allocate more than 16 MB of memory. We solve this by
15620 bumping the mprotect() limit in the sandbox module from 16 MB to
15621 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
15623 o Minor bugfixes (logging):
15624 - When decompressing, do not warn if we fail to decompress using a
15625 compression method that we merely guessed. Fixes part of bug
15626 22670; bugfix on 0.1.1.14-alpha.
15627 - When decompressing, treat mismatch between content-encoding and
15628 actual compression type as a protocol warning. Fixes part of bug
15629 22670; bugfix on 0.1.1.9-alpha.
15630 - Downgrade "assigned_to_cpuworker failed" message to info-level
15631 severity. In every case that can reach it, either a better warning
15632 has already been logged, or no warning is warranted. Fixes bug
15633 22356; bugfix on 0.2.6.3-alpha.
15634 - Demote a warn that was caused by libevent delays to info if
15635 netflow padding is less than 4.5 seconds late, or to notice
15636 if it is more (4.5 seconds is the amount of time that a netflow
15637 record might be emitted after, if we chose the maximum timeout).
15638 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
15640 o Minor bugfixes (process behavior):
15641 - When exiting because of an error, always exit with a nonzero exit
15642 status. Previously, we would fail to report an error in our exit
15643 status in cases related to __OwningControllerProcess failure,
15644 lockfile contention, and Ed25519 key initialization. Fixes bug
15645 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
15646 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
15650 - Add a manpage description for the key-pinning-journal file. Closes
15652 - Correctly note that bandwidth accounting values are stored in the
15653 state file, and the bw_accounting file is now obsolete. Closes
15655 - Document more of the files in the Tor data directory, including
15656 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
15657 approved-routers, sr-random, and diff-cache. Found while fixing
15661 Changes in version 0.3.0.9 - 2017-06-29
15662 Tor 0.3.0.9 fixes a path selection bug that would allow a client
15663 to use a guard that was in the same network family as a chosen exit
15664 relay. This is a security regression; all clients running earlier
15665 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
15668 This release also backports several other bugfixes from the 0.3.1.x
15671 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
15672 - When choosing which guard to use for a circuit, avoid the exit's
15673 family along with the exit itself. Previously, the new guard
15674 selection logic avoided the exit, but did not consider its family.
15675 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15676 006 and CVE-2017-0377.
15678 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
15679 - Don't block bootstrapping when a primary bridge is offline and we
15680 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15681 21969; bugfix on 0.3.0.3-alpha.
15683 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
15684 - When starting with an old consensus, do not add new entry guards
15685 unless the consensus is "reasonably live" (under 1 day old). Fixes
15686 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15688 o Minor features (geoip):
15689 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15692 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15693 - Reject version numbers with non-numeric prefixes (such as +, -, or
15694 whitespace). Disallowing whitespace prevents differential version
15695 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15696 and part of 21508; bugfix on 0.0.8pre1.
15698 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15699 - Permit the fchmod system call, to avoid crashing on startup when
15700 starting with the seccomp2 sandbox and an unexpected set of
15701 permissions on the data directory or its contents. Fixes bug
15702 22516; bugfix on 0.2.5.4-alpha.
15704 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
15705 - Fix a memset() off the end of an array when packing cells. This
15706 bug should be harmless in practice, since the corrupted bytes are
15707 still in the same structure, and are always padding bytes,
15708 ignored, or immediately overwritten, depending on compiler
15709 behavior. Nevertheless, because the memset()'s purpose is to make
15710 sure that any other cell-handling bugs can't expose bytes to the
15711 network, we need to fix it. Fixes bug 22737; bugfix on
15712 0.2.4.11-alpha. Fixes CID 1401591.
15715 Changes in version 0.3.1.3-alpha - 2017-06-08
15716 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
15717 remotely crash a hidden service with an assertion failure. Anyone
15718 running a hidden service should upgrade to this version, or to some
15719 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15721 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
15722 that sometimes made relays unreliable, as well as several other
15723 bugfixes described below.
15725 o Major bugfixes (hidden service, relay, security):
15726 - Fix a remotely triggerable assertion failure when a hidden service
15727 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15728 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15729 - Fix a remotely triggerable assertion failure caused by receiving a
15730 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15731 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15734 o Major bugfixes (relay, link handshake):
15735 - When performing the v3 link handshake on a TLS connection, report
15736 that we have the x509 certificate that we actually used on that
15737 connection, even if we have changed certificates since that
15738 connection was first opened. Previously, we would claim to have
15739 used our most recent x509 link certificate, which would sometimes
15740 make the link handshake fail. Fixes one case of bug 22460; bugfix
15743 o Major bugfixes (relays, key management):
15744 - Regenerate link and authentication certificates whenever the key
15745 that signs them changes; also, regenerate link certificates
15746 whenever the signed key changes. Previously, these processes were
15747 only weakly coupled, and we relays could (for minutes to hours)
15748 wind up with an inconsistent set of keys and certificates, which
15749 other relays would not accept. Fixes two cases of bug 22460;
15750 bugfix on 0.3.0.1-alpha.
15751 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15752 send the certificate that matches the x509 certificate that we
15753 used on the TLS connection. Previously, there was a race condition
15754 if the TLS context rotated after we began the TLS handshake but
15755 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15758 o Major bugfixes (torrc, crash):
15759 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
15760 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
15762 o Minor features (code style):
15763 - Add "Falls through" comments to our codebase, in order to silence
15764 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15765 Stieger. Closes ticket 22446.
15767 o Minor features (diagnostic):
15768 - Add logging messages to try to diagnose a rare bug that seems to
15769 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
15770 think this is happening because of incorrect system clocks, but
15771 we'd like to know for certain. Diagnostic for bug 22466.
15773 o Minor bugfixes (correctness):
15774 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15775 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15777 o Minor bugfixes (directory protocol):
15778 - Check for libzstd >= 1.1, because older versions lack the
15779 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
15781 o Minor bugfixes (link handshake):
15782 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15783 months, and regenerate it when it is within one month of expiring.
15784 Previously, we had generated this certificate at startup with a
15785 ten-year lifetime, but that could lead to weird behavior when Tor
15786 was started with a grossly inaccurate clock. Mitigates bug 22466;
15787 mitigation on 0.3.0.1-alpha.
15789 o Minor bugfixes (storage directories):
15790 - Always check for underflows in the cached storage directory usage.
15791 If the usage does underflow, re-calculate it. Also, avoid a
15792 separate underflow when the usage is not known. Fixes bug 22424;
15793 bugfix on 0.3.1.1-alpha.
15795 o Minor bugfixes (unit tests):
15796 - The unit tests now pass on systems where localhost is misconfigured
15797 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
15801 - Clarify the manpage for the (deprecated) torify script. Closes
15804 Changes in version 0.3.0.8 - 2017-06-08
15805 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
15806 remotely crash a hidden service with an assertion failure. Anyone
15807 running a hidden service should upgrade to this version, or to some
15808 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15810 Tor 0.3.0.8 also includes fixes for several key management bugs
15811 that sometimes made relays unreliable, as well as several other
15812 bugfixes described below.
15814 o Major bugfixes (hidden service, relay, security, backport
15815 from 0.3.1.3-alpha):
15816 - Fix a remotely triggerable assertion failure when a hidden service
15817 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15818 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15819 - Fix a remotely triggerable assertion failure caused by receiving a
15820 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15821 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15824 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15825 - When performing the v3 link handshake on a TLS connection, report
15826 that we have the x509 certificate that we actually used on that
15827 connection, even if we have changed certificates since that
15828 connection was first opened. Previously, we would claim to have
15829 used our most recent x509 link certificate, which would sometimes
15830 make the link handshake fail. Fixes one case of bug 22460; bugfix
15833 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
15834 - Regenerate link and authentication certificates whenever the key
15835 that signs them changes; also, regenerate link certificates
15836 whenever the signed key changes. Previously, these processes were
15837 only weakly coupled, and we relays could (for minutes to hours)
15838 wind up with an inconsistent set of keys and certificates, which
15839 other relays would not accept. Fixes two cases of bug 22460;
15840 bugfix on 0.3.0.1-alpha.
15841 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15842 send the certificate that matches the x509 certificate that we
15843 used on the TLS connection. Previously, there was a race condition
15844 if the TLS context rotated after we began the TLS handshake but
15845 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15848 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
15849 - Stop rejecting v3 hidden service descriptors because their size
15850 did not match an old padding rule. Fixes bug 22447; bugfix on
15853 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15854 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15855 December 2016 (of which ~126 were still functional) with a list of
15856 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15857 2017. Resolves ticket 21564.
15859 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
15860 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15861 bug 22252; bugfix on 0.2.9.3-alpha.
15863 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15864 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15865 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15867 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
15868 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15869 months, and regenerate it when it is within one month of expiring.
15870 Previously, we had generated this certificate at startup with a
15871 ten-year lifetime, but that could lead to weird behavior when Tor
15872 was started with a grossly inaccurate clock. Mitigates bug 22466;
15873 mitigation on 0.3.0.1-alpha.
15875 o Minor bugfixes (memory leak, directory authority, backport from
15877 - When directory authorities reject a router descriptor due to
15878 keypinning, free the router descriptor rather than leaking the
15879 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15882 Changes in version 0.2.9.11 - 2017-06-08
15883 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
15884 remotely crash a hidden service with an assertion failure. Anyone
15885 running a hidden service should upgrade to this version, or to some
15886 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15887 are not affected by TROVE-2017-004.)
15889 Tor 0.2.9.11 also backports fixes for several key management bugs
15890 that sometimes made relays unreliable, as well as several other
15891 bugfixes described below.
15893 o Major bugfixes (hidden service, relay, security, backport
15894 from 0.3.1.3-alpha):
15895 - Fix a remotely triggerable assertion failure caused by receiving a
15896 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15897 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15900 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15901 - When performing the v3 link handshake on a TLS connection, report
15902 that we have the x509 certificate that we actually used on that
15903 connection, even if we have changed certificates since that
15904 connection was first opened. Previously, we would claim to have
15905 used our most recent x509 link certificate, which would sometimes
15906 make the link handshake fail. Fixes one case of bug 22460; bugfix
15909 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15910 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15911 December 2016 (of which ~126 were still functional) with a list of
15912 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15913 2017. Resolves ticket 21564.
15915 o Minor features (future-proofing, backport from 0.3.0.7):
15916 - Tor no longer refuses to download microdescriptors or descriptors if
15917 they are listed as "published in the future". This change will
15918 eventually allow us to stop listing meaningful "published" dates
15919 in microdescriptor consensuses, and thereby allow us to reduce the
15920 resources required to download consensus diffs by over 50%.
15921 Implements part of ticket 21642; implements part of proposal 275.
15923 o Minor features (directory authorities, backport from 0.3.0.4-rc)
15924 - Directory authorities now reject relays running versions
15925 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15926 suffer from bug 20499 and don't keep their consensus cache
15927 up-to-date. Resolves ticket 20509.
15929 o Minor features (geoip):
15930 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15933 o Minor bugfixes (control port, backport from 0.3.0.6):
15934 - The GETINFO extra-info/digest/<digest> command was broken because
15935 of a wrong base16 decode return value check, introduced when
15936 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15938 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15939 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15940 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15942 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
15943 - The getpid() system call is now permitted under the Linux seccomp2
15944 sandbox, to avoid crashing with versions of OpenSSL (and other
15945 libraries) that attempt to learn the process's PID by using the
15946 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15949 o Minor bugfixes (memory leak, directory authority, backport
15950 from 0.3.1.2-alpha):
15951 - When directory authorities reject a router descriptor due to
15952 keypinning, free the router descriptor rather than leaking the
15953 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15955 Changes in version 0.2.8.14 - 2017-06-08
15956 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15957 remotely crash a hidden service with an assertion failure. Anyone
15958 running a hidden service should upgrade to this version, or to some
15959 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15960 are not affected by TROVE-2017-004.)
15962 o Major bugfixes (hidden service, relay, security):
15963 - Fix a remotely triggerable assertion failure caused by receiving a
15964 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15965 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15968 o Minor features (geoip):
15969 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15972 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15973 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15974 December 2016 (of which ~126 were still functional) with a list of
15975 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15976 2017. Resolves ticket 21564.
15978 o Minor bugfixes (correctness):
15979 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15980 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15982 Changes in version 0.2.7.8 - 2017-06-08
15983 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15984 remotely crash a hidden service with an assertion failure. Anyone
15985 running a hidden service should upgrade to this version, or to some
15986 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15987 are not affected by TROVE-2017-004.)
15989 o Major bugfixes (hidden service, relay, security):
15990 - Fix a remotely triggerable assertion failure caused by receiving a
15991 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15992 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15995 o Minor features (geoip):
15996 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15999 o Minor bugfixes (correctness):
16000 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16001 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16004 Changes in version 0.2.6.12 - 2017-06-08
16005 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
16006 remotely crash a hidden service with an assertion failure. Anyone
16007 running a hidden service should upgrade to this version, or to some
16008 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16009 are not affected by TROVE-2017-004.)
16011 o Major bugfixes (hidden service, relay, security):
16012 - Fix a remotely triggerable assertion failure caused by receiving a
16013 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16014 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16017 o Minor features (geoip):
16018 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16021 o Minor bugfixes (correctness):
16022 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16023 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16025 Changes in version 0.2.5.14 - 2017-06-08
16026 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
16027 remotely crash a hidden service with an assertion failure. Anyone
16028 running a hidden service should upgrade to this version, or to some
16029 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16030 are not affected by TROVE-2017-004.)
16032 o Major bugfixes (hidden service, relay, security):
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 Minor features (geoip):
16039 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16042 o Minor bugfixes (correctness):
16043 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16044 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16046 Changes in version 0.2.4.29 - 2017-06-08
16047 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
16048 remotely crash a hidden service with an assertion failure. Anyone
16049 running a hidden service should upgrade to this version, or to some
16050 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
16051 are not affected by TROVE-2017-004.)
16053 o Major bugfixes (hidden service, relay, security):
16054 - Fix a remotely triggerable assertion failure caused by receiving a
16055 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
16056 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
16059 o Minor features (geoip):
16060 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16063 o Minor bugfixes (correctness):
16064 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
16065 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
16068 Changes in version 0.3.1.2-alpha - 2017-05-26
16069 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
16070 fixes a few bugs found while testing 0.3.1.1-alpha, including a
16071 memory corruption bug that affected relay stability.
16073 o Major bugfixes (crash, relay):
16074 - Fix a memory-corruption bug in relays that set MyFamily.
16075 Previously, they would double-free MyFamily elements when making
16076 the next descriptor or when changing their configuration. Fixes
16077 bug 22368; bugfix on 0.3.1.1-alpha.
16079 o Minor bugfixes (logging):
16080 - Log a better message when a directory authority replies to an
16081 upload with an unexpected status code. Fixes bug 11121; bugfix
16084 o Minor bugfixes (memory leak, directory authority):
16085 - When directory authorities reject a router descriptor due to
16086 keypinning, free the router descriptor rather than leaking the
16087 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
16090 Changes in version 0.3.1.1-alpha - 2017-05-22
16091 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
16092 reduces the bandwidth usage for Tor's directory protocol, adds some
16093 basic padding to resist netflow-based traffic analysis and to serve as
16094 the basis of other padding in the future, and adds rust support to the
16097 It also contains numerous other small features and improvements to
16098 security, correctness, and performance.
16100 Below are the changes since 0.3.0.7.
16102 o Major features (directory protocol):
16103 - Tor relays and authorities can now serve clients an abbreviated
16104 version of the consensus document, containing only the changes
16105 since an older consensus document that the client holds. Clients
16106 now request these documents when available. When both client and
16107 server use this new protocol, they will use far less bandwidth (up
16108 to 94% less) to keep the client's consensus up-to-date. Implements
16109 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
16110 - Tor can now compress directory traffic with lzma or with zstd
16111 compression algorithms, which can deliver better bandwidth
16112 performance. Because lzma is computationally expensive, it's only
16113 used for documents that can be compressed once and served many
16114 times. Support for these algorithms requires that tor is built
16115 with the libzstd and/or liblzma libraries available. Implements
16116 proposal 278; closes ticket 21662.
16117 - Relays now perform the more expensive compression operations, and
16118 consensus diff generation, in worker threads. This separation
16119 avoids delaying the main thread when a new consensus arrives.
16121 o Major features (experimental):
16122 - Tor can now build modules written in Rust. To turn this on, pass
16123 the "--enable-rust" flag to the configure script. It's not time to
16124 get excited yet: currently, there is no actual Rust functionality
16125 beyond some simple glue code, and a notice at startup to tell you
16126 that Rust is running. Still, we hope that programmers and
16127 packagers will try building Tor with Rust support, so that we can
16128 find issues and solve portability problems. Closes ticket 22106.
16130 o Major features (traffic analysis resistance):
16131 - Connections between clients and relays now send a padding cell in
16132 each direction every 1.5 to 9.5 seconds (tunable via consensus
16133 parameters). This padding will not resist specialized
16134 eavesdroppers, but it should be enough to make many ISPs' routine
16135 network flow logging less useful in traffic analysis against
16138 Padding is negotiated using Tor's link protocol, so both relays
16139 and clients must upgrade for this to take effect. Clients may
16140 still send padding despite the relay's version by setting
16141 ConnectionPadding 1 in torrc, and may disable padding by setting
16142 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
16143 users with the torrc option ReducedConnectionPadding. Implements
16144 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
16145 - Relays will publish 24 hour totals of padding and non-padding cell
16146 counts to their extra-info descriptors, unless PaddingStatistics 0
16147 is set in torrc. These 24 hour totals are also rounded to
16148 multiples of 10000.
16150 o Major bugfixes (connection usage):
16151 - We use NETINFO cells to try to determine if both relays involved
16152 in a connection will agree on the canonical status of that
16153 connection. We prefer the connections where this is the case for
16154 extend cells, and try to close connections where relays disagree
16155 on their canonical status early. Also, we now prefer the oldest
16156 valid connection for extend cells. These two changes should reduce
16157 the number of long-term connections that are kept open between
16158 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
16159 - Relays now log hourly statistics (look for
16160 "channel_check_for_duplicates" lines) on the total number of
16161 connections to other relays. If the number of connections per
16162 relay is unexpectedly large, this log message is at notice level.
16163 Otherwise it is at info.
16165 o Major bugfixes (entry guards):
16166 - Don't block bootstrapping when a primary bridge is offline and we
16167 can't get its descriptor. Fixes bug 22325; fixes one case of bug
16168 21969; bugfix on 0.3.0.3-alpha.
16170 o Major bugfixes (linux TPROXY support):
16171 - Fix a typo that had prevented TPROXY-based transparent proxying
16172 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
16173 Patch from "d4fq0fQAgoJ".
16175 o Minor features (security, windows):
16176 - Enable a couple of pieces of Windows hardening: one
16177 (HeapEnableTerminationOnCorruption) that has been on-by-default
16178 since Windows 8, and unavailable before Windows 7; and one
16179 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
16180 affect us, but shouldn't do any harm. Closes ticket 21953.
16182 o Minor features (config options):
16183 - Allow "%include" directives in torrc configuration files. These
16184 directives import the settings from other files, or from all the
16185 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
16186 - Make SAVECONF return an error when overwriting a torrc that has
16187 includes. Using SAVECONF with the FORCE option will allow it to
16188 overwrite torrc even if includes are used. Related to ticket 1922.
16189 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
16190 will work without the FORCE option. Related to ticket 1922.
16192 o Minor features (controller):
16193 - Warn the first time that a controller requests data in the long-
16194 deprecated 'GETINFO network-status' format. Closes ticket 21703.
16196 o Minor features (defaults):
16197 - The default value for UseCreateFast is now 0: clients which
16198 haven't yet received a consensus document will now use a proper
16199 ntor handshake to talk to their directory servers whenever they
16200 can. Closes ticket 21407.
16201 - Onion key rotation and expiry intervals are now defined as a
16202 network consensus parameter, per proposal 274. The default
16203 lifetime of an onion key is increased from 7 to 28 days. Old onion
16204 keys will expire after 7 days by default. This change will make
16205 consensus diffs much smaller, and save significant bandwidth.
16206 Closes ticket 21641.
16208 o Minor features (fallback directory list):
16209 - Update the fallback directory mirror whitelist and blacklist based
16210 on operator emails. Closes task 21121.
16211 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
16212 December 2016 (of which ~126 were still functional) with a list of
16213 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
16214 2017. Resolves ticket 21564.
16216 o Minor features (hidden services, logging):
16217 - Log a message when a hidden service descriptor has fewer
16218 introduction points than specified in
16219 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
16220 - Log a message when a hidden service reaches its introduction point
16221 circuit limit, and when that limit is reset. Follow up to ticket
16222 21594; closes ticket 21622.
16223 - Warn user if multiple entries in EntryNodes and at least one
16224 HiddenService are used together. Pinning EntryNodes along with a
16225 hidden service can be possibly harmful; for instance see ticket
16226 14917 or 21155. Closes ticket 21155.
16228 o Minor features (linux seccomp2 sandbox):
16229 - We now have a document storage backend compatible with the Linux
16230 seccomp2 sandbox. This backend is used for consensus documents and
16231 diffs between them; in the long term, we'd like to use it for
16232 unparseable directory material too. Closes ticket 21645
16233 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
16234 from 1MB to 16MB. This was necessary with the glibc allocator in
16235 order to allow worker threads to allocate more memory -- which in
16236 turn is necessary because of our new use of worker threads for
16237 compression. Closes ticket 22096.
16239 o Minor features (logging):
16240 - Log files are no longer created world-readable by default.
16241 (Previously, most distributors would store the logs in a non-
16242 world-readable location to prevent inappropriate access. This
16243 change is an extra precaution.) Closes ticket 21729; patch
16246 o Minor features (performance):
16247 - Our Keccak (SHA-3) implementation now accesses memory more
16248 efficiently, especially on little-endian systems. Closes
16250 - Add an O(1) implementation of channel_find_by_global_id(), to
16251 speed some controller functions.
16253 o Minor features (relay, configuration):
16254 - The MyFamily option may now be repeated as many times as desired,
16255 for relays that want to configure large families. Closes ticket
16256 4998; patch by Daniel Pinto.
16258 o Minor features (safety):
16259 - Add an explicit check to extrainfo_parse_entry_from_string() for
16260 NULL inputs. We don't believe this can actually happen, but it may
16261 help silence a warning from the Clang analyzer. Closes
16264 o Minor features (testing):
16265 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
16266 When Tor is compiled with this option, we disable a number of
16267 redundant memory-safety failsafes that are intended to stop bugs
16268 from becoming security issues. This makes it easier to hunt for
16269 bugs that would be security issues without the failsafes turned
16270 on. Closes ticket 21439.
16271 - Add a general event-tracing instrumentation support to Tor. This
16272 subsystem will enable developers and researchers to add fine-
16273 grained instrumentation to their Tor instances, for use when
16274 examining Tor network performance issues. There are no trace
16275 events yet, and event-tracing is off by default unless enabled at
16276 compile time. Implements ticket 13802.
16277 - Improve our version parsing tests: add tests for typical version
16278 components, add tests for invalid versions, including numeric
16279 range and non-numeric prefixes. Unit tests 21278, 21450, and
16280 21507. Partially implements 21470.
16282 o Minor bugfixes (bandwidth accounting):
16283 - Roll over monthly accounting at the configured hour and minute,
16284 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
16285 Found by Andrey Karpov with PVS-Studio.
16287 o Minor bugfixes (code correctness):
16288 - Accurately identify client connections by their lack of peer
16289 authentication. This means that we bail out earlier if asked to
16290 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
16293 o Minor bugfixes (configuration):
16294 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
16295 bug 22252; bugfix on 0.2.9.3-alpha.
16297 o Minor bugfixes (connection lifespan):
16298 - Allow more control over how long TLS connections are kept open:
16299 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
16300 single option called CircuitsAvailableTimeout. Also, allow the
16301 consensus to control the default values for both this preference
16302 and the lifespan of relay-to-relay connections. Fixes bug 17592;
16303 bugfix on 0.2.5.5-alpha.
16304 - Increase the initial circuit build timeout testing frequency, to
16305 help ensure that ReducedConnectionPadding clients finish learning
16306 a timeout before their orconn would expire. The initial testing
16307 rate was set back in the days of TAP and before the Tor Browser
16308 updater, when we had to be much more careful about new clients
16309 making lots of circuits. With this change, a circuit build timeout
16310 is learned in about 15-20 minutes, instead of 100-120 minutes.
16312 o Minor bugfixes (controller):
16313 - GETINFO onions/current and onions/detached no longer respond with
16314 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
16315 - Trigger HS descriptor events on the control port when the client
16316 fails to pick a hidden service directory for a hidden service.
16317 This can happen if all the hidden service directories are in
16318 ExcludeNodes, or they have all been queried within the last 15
16319 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
16321 o Minor bugfixes (directory authority):
16322 - When rejecting a router descriptor for running an obsolete version
16323 of Tor without ntor support, warn about the obsolete tor version,
16324 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
16325 - Prevent the shared randomness subsystem from asserting when
16326 initialized by a bridge authority with an incomplete configuration
16327 file. Fixes bug 21586; bugfix on 0.2.9.8.
16329 o Minor bugfixes (exit-side DNS):
16330 - Fix an untriggerable assertion that checked the output of a
16331 libevent DNS error, so that the assertion actually behaves as
16332 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
16333 Karpov using PVS-Studio.
16335 o Minor bugfixes (fallback directories):
16336 - Make the usage example in updateFallbackDirs.py actually work, and
16337 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
16338 - Decrease the guard flag average required to be a fallback. This
16339 allows us to keep relays that have their guard flag removed when
16340 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
16341 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
16342 bugfix on 0.2.8.1-alpha.
16343 - Make sure fallback directory mirrors have the same address, port,
16344 and relay identity key for at least 30 days before they are
16345 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
16347 o Minor bugfixes (hidden services):
16348 - Stop printing a cryptic warning when a hidden service gets a
16349 request to connect to a virtual port that it hasn't configured.
16350 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
16351 - Simplify hidden service descriptor creation by using an existing
16352 flag to check if an introduction point is established. Fixes bug
16353 21599; bugfix on 0.2.7.2-alpha.
16355 o Minor bugfixes (memory leak):
16356 - Fix a small memory leak at exit from the backtrace handler code.
16357 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
16359 o Minor bugfixes (protocol, logging):
16360 - Downgrade a log statement about unexpected relay cells from "bug"
16361 to "protocol warning", because there is at least one use case
16362 where it can be triggered by a buggy tor implementation. Fixes bug
16363 21293; bugfix on 0.1.1.14-alpha.
16365 o Minor bugfixes (testing):
16366 - Use unbuffered I/O for utility functions around the
16367 process_handle_t type. This fixes unit test failures reported on
16368 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
16369 - Make display of captured unit test log messages consistent. Fixes
16370 bug 21510; bugfix on 0.2.9.3-alpha.
16371 - Make test-network.sh always call chutney's test-network.sh.
16372 Previously, this only worked on systems which had bash installed,
16373 due to some bash-specific code in the script. Fixes bug 19699;
16374 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
16376 o Minor bugfixes (voting consistency):
16377 - Reject version numbers with non-numeric prefixes (such as +, -, or
16378 whitespace). Disallowing whitespace prevents differential version
16379 parsing between POSIX-based and Windows platforms. Fixes bug 21507
16380 and part of 21508; bugfix on 0.0.8pre1.
16382 o Minor bugfixes (windows, relay):
16383 - Resolve "Failure from drain_fd: No error" warnings on Windows
16384 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
16386 o Code simplification and refactoring:
16387 - Break up the 630-line function connection_dir_client_reached_eof()
16388 into a dozen smaller functions. This change should help
16389 maintainability and readability of the client directory code.
16390 - Isolate our use of the openssl headers so that they are only
16391 included from our crypto wrapper modules, and from tests that
16392 examine those modules' internals. Closes ticket 21841.
16393 - Simplify our API to launch directory requests, making it more
16394 extensible and less error-prone. Now it's easier to add extra
16395 headers to directory requests. Closes ticket 21646.
16396 - Our base64 decoding functions no longer overestimate the output
16397 space that they need when parsing unpadded inputs. Closes
16399 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
16400 Resolves ticket 22213.
16401 - The logic that directory caches use to spool request to clients,
16402 serving them one part at a time so as not to allocate too much
16403 memory, has been refactored for consistency. Previously there was
16404 a separate spooling implementation per type of spoolable data. Now
16405 there is one common spooling implementation, with extensible data
16406 types. Closes ticket 21651.
16407 - Tor's compression module now supports multiple backends. Part of
16408 the implementation for proposal 278; closes ticket 21663.
16411 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
16412 Closes ticket 21873.
16413 - Correct documentation about the default DataDirectory value.
16414 Closes ticket 21151.
16415 - Document the default behavior of NumEntryGuards and
16416 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
16418 - Document key=value pluggable transport arguments for Bridge lines
16419 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
16420 - Note that bandwidth-limiting options don't affect TCP headers or
16421 DNS. Closes ticket 17170.
16423 o Removed features (configuration options, all in ticket 22060):
16424 - These configuration options are now marked Obsolete, and no longer
16425 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
16426 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
16427 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
16428 in 0.2.9.2-alpha and have now been removed. The previous default
16429 behavior is now always chosen; the previous (less secure) non-
16430 default behavior is now unavailable.
16431 - CloseHSClientCircuitsImmediatelyOnTimeout and
16432 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
16433 0.2.9.2-alpha and now have been removed. HS circuits never close
16434 on circuit build timeout; they have a longer timeout period.
16435 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
16436 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
16437 (and others) to configure listen-only and advertise-only addresses.
16439 o Removed features (tools):
16440 - We've removed the tor-checkkey tool from src/tools. Long ago, we
16441 used it to help people detect RSA keys that were generated by
16442 versions of Debian affected by CVE-2008-0166. But those keys have
16443 been out of circulation for ages, and this tool is no longer
16444 required. Closes ticket 21842.
16447 Changes in version 0.3.0.7 - 2017-05-15
16448 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
16449 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
16450 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
16451 clients are not affected.
16453 o Major bugfixes (hidden service directory, security):
16454 - Fix an assertion failure in the hidden service directory code, which
16455 could be used by an attacker to remotely cause a Tor relay process to
16456 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
16457 should upgrade. This security issue is tracked as TROVE-2017-002.
16458 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
16461 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16464 o Minor features (future-proofing):
16465 - Tor no longer refuses to download microdescriptors or descriptors
16466 if they are listed as "published in the future". This change will
16467 eventually allow us to stop listing meaningful "published" dates
16468 in microdescriptor consensuses, and thereby allow us to reduce the
16469 resources required to download consensus diffs by over 50%.
16470 Implements part of ticket 21642; implements part of proposal 275.
16472 o Minor bugfixes (Linux seccomp2 sandbox):
16473 - The getpid() system call is now permitted under the Linux seccomp2
16474 sandbox, to avoid crashing with versions of OpenSSL (and other
16475 libraries) that attempt to learn the process's PID by using the
16476 syscall rather than the VDSO code. Fixes bug 21943; bugfix
16480 Changes in version 0.3.0.6 - 2017-04-26
16481 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
16483 With the 0.3.0 series, clients and relays now use Ed25519 keys to
16484 authenticate their link connections to relays, rather than the old
16485 RSA1024 keys that they used before. (Circuit crypto has been
16486 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
16487 the guard selection and replacement algorithm to behave more robustly
16488 in the presence of unreliable networks, and to resist guard-
16491 This series also includes numerous other small features and bugfixes,
16492 along with more groundwork for the upcoming hidden-services revamp.
16494 Per our stable release policy, we plan to support the Tor 0.3.0
16495 release series for at least the next nine months, or for three months
16496 after the first stable release of the 0.3.1 series: whichever is
16497 longer. If you need a release with long-term support, we recommend
16498 that you stay with the 0.2.9 series.
16500 Below are the changes since 0.3.0.5-rc. For a list of all changes
16501 since 0.2.9, see the ReleaseNotes file.
16503 o Minor features (geoip):
16504 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
16507 o Minor bugfixes (control port):
16508 - The GETINFO extra-info/digest/<digest> command was broken because
16509 of a wrong base16 decode return value check, introduced when
16510 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
16512 o Minor bugfixes (crash prevention):
16513 - Fix a (currently untriggerable, but potentially dangerous) crash
16514 bug when base32-encoding inputs whose sizes are not a multiple of
16515 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
16518 Changes in version 0.3.0.5-rc - 2017-04-05
16519 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
16520 0.3.0 release series.
16522 This is the second release candidate in the Tor 0.3.0 series, and has
16523 much fewer changes than the first. If we find no new bugs or
16524 regressions here, the first stable 0.3.0 release will be nearly
16527 o Major bugfixes (crash, directory connections):
16528 - Fix a rare crash when sending a begin cell on a circuit whose
16529 linked directory connection had already been closed. Fixes bug
16530 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
16532 o Major bugfixes (guard selection):
16533 - Fix a guard selection bug where Tor would refuse to bootstrap in
16534 some cases if the user swapped a bridge for another bridge in
16535 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
16536 Reported by "torvlnt33r".
16538 o Minor features (geoip):
16539 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
16542 o Minor bugfix (compilation):
16543 - Fix a warning when compiling hs_service.c. Previously, it had no
16544 exported symbols when compiled for libor.a, resulting in a
16545 compilation warning from clang. Fixes bug 21825; bugfix
16548 o Minor bugfixes (hidden services):
16549 - Make hidden services check for failed intro point connections,
16550 even when they have exceeded their intro point creation limit.
16551 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
16552 - Make hidden services with 8 to 10 introduction points check for
16553 failed circuits immediately after startup. Previously, they would
16554 wait for 5 minutes before performing their first checks. Fixes bug
16555 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
16557 o Minor bugfixes (memory leaks):
16558 - Fix a memory leak when using GETCONF on a port option. Fixes bug
16559 21682; bugfix on 0.3.0.3-alpha.
16561 o Minor bugfixes (relay):
16562 - Avoid a double-marked-circuit warning that could happen when we
16563 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
16566 o Minor bugfixes (tests):
16567 - Run the entry_guard_parse_from_state_full() test with the time set
16568 to a specific date. (The guard state that this test was parsing
16569 contained guards that had expired since the test was first
16570 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
16573 - Update the description of the directory server options in the
16574 manual page, to clarify that a relay no longer needs to set
16575 DirPort in order to be a directory cache. Closes ticket 21720.
16579 Changes in version 0.2.8.13 - 2017-03-03
16580 Tor 0.2.8.13 backports a security fix from later Tor
16581 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
16582 this release, if for some reason they cannot upgrade to a later
16583 release series, and if they build Tor with the --enable-expensive-hardening
16586 Note that support for Tor 0.2.8.x is ending next year: we will not issue
16587 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
16588 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16590 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16591 - Fix an integer underflow bug when comparing malformed Tor
16592 versions. This bug could crash Tor when built with
16593 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16594 0.2.9.8, which were built with -ftrapv by default. In other cases
16595 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16596 on 0.0.8pre1. Found by OSS-Fuzz.
16598 o Minor features (geoip):
16599 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16603 Changes in version 0.2.7.7 - 2017-03-03
16604 Tor 0.2.7.7 backports a number of security fixes from later Tor
16605 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
16606 this release, if for some reason they cannot upgrade to a later
16609 Note that support for Tor 0.2.7.x is ending this year: we will not issue
16610 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
16611 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16613 o Directory authority changes (backport from 0.2.8.5-rc):
16614 - Urras is no longer a directory authority. Closes ticket 19271.
16616 o Directory authority changes (backport from 0.2.9.2-alpha):
16617 - The "Tonga" bridge authority has been retired; the new bridge
16618 authority is "Bifroest". Closes tickets 19728 and 19690.
16620 o Directory authority key updates (backport from 0.2.8.1-alpha):
16621 - Update the V3 identity key for the dannenberg directory authority:
16622 it was changed on 18 November 2015. Closes task 17906. Patch
16625 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16626 - Fix a bug in parsing that could cause clients to read a single
16627 byte past the end of an allocated region. This bug could be used
16628 to cause hardened clients (built with --enable-expensive-hardening)
16629 to crash if they tried to visit a hostile hidden service. Non-
16630 hardened clients are only affected depending on the details of
16631 their platform's memory allocator. Fixes bug 21018; bugfix on
16632 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16633 2016-12-002 and as CVE-2016-1254.
16635 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16636 - Stop a crash that could occur when a client running with DNSPort
16637 received a query with multiple address types, and the first
16638 address type was not supported. Found and fixed by Scott Dial.
16639 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16640 - Prevent a class of security bugs caused by treating the contents
16641 of a buffer chunk as if they were a NUL-terminated string. At
16642 least one such bug seems to be present in all currently used
16643 versions of Tor, and would allow an attacker to remotely crash
16644 most Tor instances, especially those compiled with extra compiler
16645 hardening. With this defense in place, such bugs can't crash Tor,
16646 though we should still fix them as they occur. Closes ticket
16647 20384 (TROVE-2016-10-001).
16649 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16650 - Avoid a difficult-to-trigger heap corruption attack when extending
16651 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16652 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16653 Reported by Guido Vranken.
16655 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16656 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16657 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16659 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16660 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16661 pointer to the previous (uninitialized) key value. The impact here
16662 should be limited to a difficult-to-trigger crash, if OpenSSL is
16663 running an engine that makes key generation failures possible, or
16664 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16665 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16668 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16669 - Fix an integer underflow bug when comparing malformed Tor
16670 versions. This bug could crash Tor when built with
16671 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16672 0.2.9.8, which were built with -ftrapv by default. In other cases
16673 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16674 on 0.0.8pre1. Found by OSS-Fuzz.
16676 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16677 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16678 zero size. Check size argument to memwipe() for underflow. Fixes
16679 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16682 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16683 - Make Tor survive errors involving connections without a
16684 corresponding event object. Previously we'd fail with an
16685 assertion; now we produce a log message. Related to bug 16248.
16687 o Minor features (geoip):
16688 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16692 Changes in version 0.2.6.11 - 2017-03-03
16693 Tor 0.2.6.11 backports a number of security fixes from later Tor
16694 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
16695 this release, if for some reason they cannot upgrade to a later
16698 Note that support for Tor 0.2.6.x is ending this year: we will not issue
16699 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
16700 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16702 o Directory authority changes (backport from 0.2.8.5-rc):
16703 - Urras is no longer a directory authority. Closes ticket 19271.
16705 o Directory authority changes (backport from 0.2.9.2-alpha):
16706 - The "Tonga" bridge authority has been retired; the new bridge
16707 authority is "Bifroest". Closes tickets 19728 and 19690.
16709 o Directory authority key updates (backport from 0.2.8.1-alpha):
16710 - Update the V3 identity key for the dannenberg directory authority:
16711 it was changed on 18 November 2015. Closes task 17906. Patch
16714 o Major features (security fixes, backport from 0.2.9.4-alpha):
16715 - Prevent a class of security bugs caused by treating the contents
16716 of a buffer chunk as if they were a NUL-terminated string. At
16717 least one such bug seems to be present in all currently used
16718 versions of Tor, and would allow an attacker to remotely crash
16719 most Tor instances, especially those compiled with extra compiler
16720 hardening. With this defense in place, such bugs can't crash Tor,
16721 though we should still fix them as they occur. Closes ticket
16722 20384 (TROVE-2016-10-001).
16724 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16725 - Fix a bug in parsing that could cause clients to read a single
16726 byte past the end of an allocated region. This bug could be used
16727 to cause hardened clients (built with --enable-expensive-hardening)
16728 to crash if they tried to visit a hostile hidden service. Non-
16729 hardened clients are only affected depending on the details of
16730 their platform's memory allocator. Fixes bug 21018; bugfix on
16731 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16732 2016-12-002 and as CVE-2016-1254.
16734 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16735 - Stop a crash that could occur when a client running with DNSPort
16736 received a query with multiple address types, and the first
16737 address type was not supported. Found and fixed by Scott Dial.
16738 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16740 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16741 - Fix an error that could cause us to read 4 bytes before the
16742 beginning of an openssl string. This bug could be used to cause
16743 Tor to crash on systems with unusual malloc implementations, or
16744 systems with unusual hardening installed. Fixes bug 17404; bugfix
16747 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16748 - Avoid a difficult-to-trigger heap corruption attack when extending
16749 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16750 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16751 Reported by Guido Vranken.
16753 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16754 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16755 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16757 o Major bugfixes (guard selection, backport from 0.2.7.6):
16758 - Actually look at the Guard flag when selecting a new directory
16759 guard. When we implemented the directory guard design, we
16760 accidentally started treating all relays as if they have the Guard
16761 flag during guard selection, leading to weaker anonymity and worse
16762 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16765 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16766 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16767 pointer to the previous (uninitialized) key value. The impact here
16768 should be limited to a difficult-to-trigger crash, if OpenSSL is
16769 running an engine that makes key generation failures possible, or
16770 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16771 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16774 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16775 - Fix an integer underflow bug when comparing malformed Tor
16776 versions. This bug could crash Tor when built with
16777 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16778 0.2.9.8, which were built with -ftrapv by default. In other cases
16779 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16780 on 0.0.8pre1. Found by OSS-Fuzz.
16782 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16783 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16784 zero size. Check size argument to memwipe() for underflow. Fixes
16785 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16788 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16789 - Make Tor survive errors involving connections without a
16790 corresponding event object. Previously we'd fail with an
16791 assertion; now we produce a log message. Related to bug 16248.
16793 o Minor features (geoip):
16794 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16797 o Minor bugfixes (compilation, backport from 0.2.7.6):
16798 - Fix a compilation warning with Clang 3.6: Do not check the
16799 presence of an address which can never be NULL. Fixes bug 17781.
16802 Changes in version 0.2.5.13 - 2017-03-03
16803 Tor 0.2.5.13 backports a number of security fixes from later Tor
16804 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
16805 this release, if for some reason they cannot upgrade to a later
16808 Note that support for Tor 0.2.5.x is ending next year: we will not issue
16809 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
16810 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16812 o Directory authority changes (backport from 0.2.8.5-rc):
16813 - Urras is no longer a directory authority. Closes ticket 19271.
16815 o Directory authority changes (backport from 0.2.9.2-alpha):
16816 - The "Tonga" bridge authority has been retired; the new bridge
16817 authority is "Bifroest". Closes tickets 19728 and 19690.
16819 o Directory authority key updates (backport from 0.2.8.1-alpha):
16820 - Update the V3 identity key for the dannenberg directory authority:
16821 it was changed on 18 November 2015. Closes task 17906. Patch
16824 o Major features (security fixes, backport from 0.2.9.4-alpha):
16825 - Prevent a class of security bugs caused by treating the contents
16826 of a buffer chunk as if they were a NUL-terminated string. At
16827 least one such bug seems to be present in all currently used
16828 versions of Tor, and would allow an attacker to remotely crash
16829 most Tor instances, especially those compiled with extra compiler
16830 hardening. With this defense in place, such bugs can't crash Tor,
16831 though we should still fix them as they occur. Closes ticket
16832 20384 (TROVE-2016-10-001).
16834 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16835 - Fix a bug in parsing that could cause clients to read a single
16836 byte past the end of an allocated region. This bug could be used
16837 to cause hardened clients (built with --enable-expensive-hardening)
16838 to crash if they tried to visit a hostile hidden service. Non-
16839 hardened clients are only affected depending on the details of
16840 their platform's memory allocator. Fixes bug 21018; bugfix on
16841 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16842 2016-12-002 and as CVE-2016-1254.
16844 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16845 - Stop a crash that could occur when a client running with DNSPort
16846 received a query with multiple address types, and the first
16847 address type was not supported. Found and fixed by Scott Dial.
16848 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16850 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16851 - Fix an error that could cause us to read 4 bytes before the
16852 beginning of an openssl string. This bug could be used to cause
16853 Tor to crash on systems with unusual malloc implementations, or
16854 systems with unusual hardening installed. Fixes bug 17404; bugfix
16857 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16858 - Avoid a difficult-to-trigger heap corruption attack when extending
16859 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16860 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16861 Reported by Guido Vranken.
16863 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16864 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16865 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16867 o Major bugfixes (guard selection, backport from 0.2.7.6):
16868 - Actually look at the Guard flag when selecting a new directory
16869 guard. When we implemented the directory guard design, we
16870 accidentally started treating all relays as if they have the Guard
16871 flag during guard selection, leading to weaker anonymity and worse
16872 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16875 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16876 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16877 pointer to the previous (uninitialized) key value. The impact here
16878 should be limited to a difficult-to-trigger crash, if OpenSSL is
16879 running an engine that makes key generation failures possible, or
16880 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16881 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16884 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16885 - Fix an integer underflow bug when comparing malformed Tor
16886 versions. This bug could crash Tor when built with
16887 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16888 0.2.9.8, which were built with -ftrapv by default. In other cases
16889 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16890 on 0.0.8pre1. Found by OSS-Fuzz.
16892 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16893 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16894 zero size. Check size argument to memwipe() for underflow. Fixes
16895 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16898 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16899 - Make Tor survive errors involving connections without a
16900 corresponding event object. Previously we'd fail with an
16901 assertion; now we produce a log message. Related to bug 16248.
16903 o Minor features (geoip):
16904 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16907 o Minor bugfixes (compilation, backport from 0.2.7.6):
16908 - Fix a compilation warning with Clang 3.6: Do not check the
16909 presence of an address which can never be NULL. Fixes bug 17781.
16911 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
16912 - Check for failures from crypto_early_init, and refuse to continue.
16913 A previous typo meant that we could keep going with an
16914 uninitialized crypto library, and would have OpenSSL initialize
16915 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
16916 when implementing ticket 4900. Patch by "teor".
16918 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16919 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16920 a client authorized hidden service. Fixes bug 15823; bugfix
16924 Changes in version 0.2.4.28 - 2017-03-03
16925 Tor 0.2.4.28 backports a number of security fixes from later Tor
16926 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
16927 this release, if for some reason they cannot upgrade to a later
16930 Note that support for Tor 0.2.4.x is ending soon: we will not issue
16931 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
16932 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
16934 o Directory authority changes (backport from 0.2.8.5-rc):
16935 - Urras is no longer a directory authority. Closes ticket 19271.
16937 o Directory authority changes (backport from 0.2.9.2-alpha):
16938 - The "Tonga" bridge authority has been retired; the new bridge
16939 authority is "Bifroest". Closes tickets 19728 and 19690.
16941 o Directory authority key updates (backport from 0.2.8.1-alpha):
16942 - Update the V3 identity key for the dannenberg directory authority:
16943 it was changed on 18 November 2015. Closes task 17906. Patch
16946 o Major features (security fixes, backport from 0.2.9.4-alpha):
16947 - Prevent a class of security bugs caused by treating the contents
16948 of a buffer chunk as if they were a NUL-terminated string. At
16949 least one such bug seems to be present in all currently used
16950 versions of Tor, and would allow an attacker to remotely crash
16951 most Tor instances, especially those compiled with extra compiler
16952 hardening. With this defense in place, such bugs can't crash Tor,
16953 though we should still fix them as they occur. Closes ticket
16954 20384 (TROVE-2016-10-001).
16956 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16957 - Fix a bug in parsing that could cause clients to read a single
16958 byte past the end of an allocated region. This bug could be used
16959 to cause hardened clients (built with --enable-expensive-hardening)
16960 to crash if they tried to visit a hostile hidden service. Non-
16961 hardened clients are only affected depending on the details of
16962 their platform's memory allocator. Fixes bug 21018; bugfix on
16963 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16964 2016-12-002 and as CVE-2016-1254.
16966 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16967 - Fix an error that could cause us to read 4 bytes before the
16968 beginning of an openssl string. This bug could be used to cause
16969 Tor to crash on systems with unusual malloc implementations, or
16970 systems with unusual hardening installed. Fixes bug 17404; bugfix
16973 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16974 - Avoid a difficult-to-trigger heap corruption attack when extending
16975 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16976 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16977 Reported by Guido Vranken.
16979 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16980 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16981 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16983 o Major bugfixes (guard selection, backport from 0.2.7.6):
16984 - Actually look at the Guard flag when selecting a new directory
16985 guard. When we implemented the directory guard design, we
16986 accidentally started treating all relays as if they have the Guard
16987 flag during guard selection, leading to weaker anonymity and worse
16988 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16991 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16992 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16993 pointer to the previous (uninitialized) key value. The impact here
16994 should be limited to a difficult-to-trigger crash, if OpenSSL is
16995 running an engine that makes key generation failures possible, or
16996 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16997 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
17000 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
17001 - Fix an integer underflow bug when comparing malformed Tor
17002 versions. This bug could crash Tor when built with
17003 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
17004 0.2.9.8, which were built with -ftrapv by default. In other cases
17005 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
17006 on 0.0.8pre1. Found by OSS-Fuzz.
17008 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
17009 - Make memwipe() do nothing when passed a NULL pointer or buffer of
17010 zero size. Check size argument to memwipe() for underflow. Fixes
17011 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
17014 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
17015 - Make Tor survive errors involving connections without a
17016 corresponding event object. Previously we'd fail with an
17017 assertion; now we produce a log message. Related to bug 16248.
17019 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
17020 - Make it harder for attackers to overload hidden services with
17021 introductions, by blocking multiple introduction requests on the
17022 same circuit. Resolves ticket 15515.
17024 o Minor features (geoip):
17025 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
17028 o Minor bugfixes (compilation, backport from 0.2.7.6):
17029 - Fix a compilation warning with Clang 3.6: Do not check the
17030 presence of an address which can never be NULL. Fixes bug 17781.
17032 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
17033 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
17034 a client authorized hidden service. Fixes bug 15823; bugfix
17038 Changes in version 0.3.0.4-rc - 2017-03-01
17039 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
17040 0.3.0 release series, and introduces a few reliability features to
17041 keep them from coming back.
17043 This is the first release candidate in the Tor 0.3.0 series. If we
17044 find no new bugs or regressions here, the first stable 0.3.0 release
17045 will be nearly identical to it.
17047 o Major bugfixes (bridges):
17048 - When the same bridge is configured multiple times with the same
17049 identity, but at different address:port combinations, treat those
17050 bridge instances as separate guards. This fix restores the ability
17051 of clients to configure the same bridge with multiple pluggable
17052 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
17054 o Major bugfixes (hidden service directory v3):
17055 - Stop crashing on a failed v3 hidden service descriptor lookup
17056 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
17058 o Major bugfixes (parsing):
17059 - When parsing a malformed content-length field from an HTTP
17060 message, do not read off the end of the buffer. This bug was a
17061 potential remote denial-of-service attack against Tor clients and
17062 relays. A workaround was released in October 2016, to prevent this
17063 bug from crashing Tor. This is a fix for the underlying issue,
17064 which should no longer matter (if you applied the earlier patch).
17065 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
17066 using AFL (http://lcamtuf.coredump.cx/afl/).
17067 - Fix an integer underflow bug when comparing malformed Tor
17068 versions. This bug could crash Tor when built with
17069 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
17070 0.2.9.8, which were built with -ftrapv by default. In other cases
17071 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
17072 on 0.0.8pre1. Found by OSS-Fuzz.
17074 o Minor feature (protocol versioning):
17075 - Add new protocol version for proposal 224. HSIntro now advertises
17076 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
17078 o Minor features (directory authorities):
17079 - Directory authorities now reject descriptors that claim to be
17080 malformed versions of Tor. Helps prevent exploitation of
17082 - Reject version numbers with components that exceed INT32_MAX.
17083 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
17084 Fixes bug 21450; bugfix on 0.0.8pre1.
17085 - Directory authorities now reject relays running versions
17086 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
17087 suffer from bug 20499 and don't keep their consensus cache
17088 up-to-date. Resolves ticket 20509.
17090 o Minor features (geoip):
17091 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
17094 o Minor features (reliability, crash):
17095 - Try better to detect problems in buffers where they might grow (or
17096 think they have grown) over 2 GB in size. Diagnostic for
17099 o Minor features (testing):
17100 - During 'make test-network-all', if tor logs any warnings, ask
17101 chutney to output them. Requires a recent version of chutney with
17102 the 21572 patch. Implements 21570.
17104 o Minor bugfixes (certificate expiration time):
17105 - Avoid using link certificates that don't become valid till some
17106 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
17108 o Minor bugfixes (code correctness):
17109 - Repair a couple of (unreachable or harmless) cases of the risky
17110 comparison-by-subtraction pattern that caused bug 21278.
17111 - Remove a redundant check for the UseEntryGuards option from the
17112 options_transition_affects_guards() function. Fixes bug 21492;
17113 bugfix on 0.3.0.1-alpha.
17115 o Minor bugfixes (directory mirrors):
17116 - Allow relays to use directory mirrors without a DirPort: these
17117 relays need to be contacted over their ORPorts using a begindir
17118 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
17119 - Clarify the message logged when a remote relay is unexpectedly
17120 missing an ORPort or DirPort: users were confusing this with a
17121 local port. Fixes another case of bug 20711; bugfix
17124 o Minor bugfixes (guards):
17125 - Don't warn about a missing guard state on timeout-measurement
17126 circuits: they aren't supposed to be using guards. Fixes an
17127 instance of bug 21007; bugfix on 0.3.0.1-alpha.
17128 - Silence a BUG() warning when attempting to use a guard whose
17129 descriptor we don't know, and make this scenario less likely to
17130 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
17132 o Minor bugfixes (hidden service):
17133 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
17134 cells. Previously, we were using sizeof() on a pointer, instead of
17135 the real destination buffer. Fortunately, that value was only used
17136 to double-check that there was enough room--which was already
17137 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
17139 o Minor bugfixes (testing):
17140 - Fix Raspbian build issues related to missing socket errno in
17141 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
17143 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
17144 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
17145 - Use bash in src/test/test-network.sh. This ensures we reliably
17146 call chutney's newer tools/test-network.sh when available. Fixes
17147 bug 21562; bugfix on 0.2.9.1-alpha.
17150 - Small fixes to the fuzzing documentation. Closes ticket 21472.
17153 Changes in version 0.2.9.10 - 2017-03-01
17154 Tor 0.2.9.10 backports a security fix from later Tor release. It also
17155 includes fixes for some major issues affecting directory authorities,
17156 LibreSSL compatibility, and IPv6 correctness.
17158 The Tor 0.2.9.x release series is now marked as a long-term-support
17159 series. We intend to backport security fixes to 0.2.9.x until at
17160 least January of 2020.
17162 o Major bugfixes (directory authority, 0.3.0.3-alpha):
17163 - During voting, when marking a relay as a probable sybil, do not
17164 clear its BadExit flag: sybils can still be bad in other ways
17165 too. (We still clear the other flags.) Fixes bug 21108; bugfix
17168 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
17169 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
17170 any IPv6 addresses. Instead, only reject a port over IPv6 if the
17171 exit policy rejects that port on more than an IPv6 /16 of
17172 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
17173 which rejected a relay's own IPv6 address by default. Fixes bug
17174 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
17176 o Major bugfixes (parsing, also in 0.3.0.4-rc):
17177 - Fix an integer underflow bug when comparing malformed Tor
17178 versions. This bug could crash Tor when built with
17179 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
17180 0.2.9.8, which were built with -ftrapv by default. In other cases
17181 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
17182 on 0.0.8pre1. Found by OSS-Fuzz.
17184 o Minor features (directory authorities, also in 0.3.0.4-rc):
17185 - Directory authorities now reject descriptors that claim to be
17186 malformed versions of Tor. Helps prevent exploitation of
17188 - Reject version numbers with components that exceed INT32_MAX.
17189 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
17190 Fixes bug 21450; bugfix on 0.0.8pre1.
17192 o Minor features (geoip):
17193 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
17196 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
17197 - Autoconf now checks to determine if OpenSSL structures are opaque,
17198 instead of explicitly checking for OpenSSL version numbers. Part
17200 - Support building with recent LibreSSL code that uses opaque
17201 structures. Closes ticket 21359.
17203 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
17204 - Repair a couple of (unreachable or harmless) cases of the risky
17205 comparison-by-subtraction pattern that caused bug 21278.
17207 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
17208 - The tor-resolve command line tool now rejects hostnames over 255
17209 characters in length. Previously, it would silently truncate them,
17210 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
17211 Patch by "junglefowl".
17214 Changes in version 0.3.0.3-alpha - 2017-02-03
17215 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
17216 0.3.0.x development series, including some that could cause
17217 authorities to behave badly. There is also a fix for a longstanding
17218 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
17219 includes some smaller features and bugfixes.
17221 The Tor 0.3.0.x release series is now in patch-freeze: no additional
17222 features will be considered for inclusion in 0.3.0.x. We suspect that
17223 some bugs will probably remain, however, and we encourage people to
17226 o Major bugfixes (directory authority):
17227 - During voting, when marking a relay as a probable sybil, do not
17228 clear its BadExit flag: sybils can still be bad in other ways
17229 too. (We still clear the other flags.) Fixes bug 21108; bugfix
17231 - When deciding whether we have just found a router to be reachable,
17232 do not penalize it for not having performed an Ed25519 link
17233 handshake if it does not claim to support an Ed25519 handshake.
17234 Previously, we would treat such relays as non-running. Fixes bug
17235 21107; bugfix on 0.3.0.1-alpha.
17237 o Major bugfixes (entry guards):
17238 - Stop trying to build circuits through entry guards for which we
17239 have no descriptor. Also, stop crashing in the case that we *do*
17240 accidentally try to build a circuit in such a state. Fixes bug
17241 21242; bugfix on 0.3.0.1-alpha.
17243 o Major bugfixes (IPv6 Exits):
17244 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
17245 any IPv6 addresses. Instead, only reject a port over IPv6 if the
17246 exit policy rejects that port on more than an IPv6 /16 of
17247 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
17248 which rejected a relay's own IPv6 address by default. Fixes bug
17249 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
17251 o Minor feature (client):
17252 - Enable IPv6 traffic on the SocksPort by default. To disable this,
17253 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
17255 o Minor feature (fallback scripts):
17256 - Add a check_existing mode to updateFallbackDirs.py, which checks
17257 if fallbacks in the hard-coded list are working. Closes ticket
17258 20174. Patch by haxxpop.
17260 o Minor features (ciphersuite selection):
17261 - Clients now advertise a list of ciphersuites closer to the ones
17262 preferred by Firefox. Closes part of ticket 15426.
17263 - Allow relays to accept a wider range of ciphersuites, including
17264 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
17266 o Minor features (controller, configuration):
17267 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
17268 and so on, now comes with a __*Port variant that will not be saved
17269 to the torrc file by the controller's SAVECONF command. This
17270 change allows TorBrowser to set up a single-use domain socket for
17271 each time it launches Tor. Closes ticket 20956.
17272 - The GETCONF command can now query options that may only be
17273 meaningful in context-sensitive lists. This allows the controller
17274 to query the mixed SocksPort/__SocksPort style options introduced
17275 in feature 20956. Implements ticket 21300.
17277 o Minor features (portability, compilation):
17278 - Autoconf now checks to determine if OpenSSL structures are opaque,
17279 instead of explicitly checking for OpenSSL version numbers. Part
17281 - Support building with recent LibreSSL code that uses opaque
17282 structures. Closes ticket 21359.
17284 o Minor features (relay):
17285 - We now allow separation of exit and relay traffic to different
17286 source IP addresses, using the OutboundBindAddressExit and
17287 OutboundBindAddressOR options respectively. Closes ticket 17975.
17288 Written by Michael Sonntag.
17290 o Minor bugfix (logging):
17291 - Don't recommend the use of Tor2web in non-anonymous mode.
17292 Recommending Tor2web is a bad idea because the client loses all
17293 anonymity. Tor2web should only be used in specific cases by users
17294 who *know* and understand the issues. Fixes bug 21294; bugfix
17297 o Minor bugfixes (client):
17298 - Always recover from failures in extend_info_from_node(), in an
17299 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
17300 bugfix on 0.2.3.1-alpha.
17302 o Minor bugfixes (client, entry guards):
17303 - Fix a bug warning (with backtrace) when we fail a channel that
17304 circuits to fallback directories on it. Fixes bug 21128; bugfix
17306 - Fix a spurious bug warning (with backtrace) when removing an
17307 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
17308 - Fix a bug of the new guard algorithm where tor could stall for up
17309 to 10 minutes before retrying a guard after a long period of no
17310 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
17311 - Do not try to build circuits until we have descriptors for our
17312 primary entry guards. Related to fix for bug 21242.
17314 o Minor bugfixes (configure, autoconf):
17315 - Rename the configure option --enable-expensive-hardening to
17316 --enable-fragile-hardening. Expensive hardening makes the tor
17317 daemon abort when some kinds of issues are detected. Thus, it
17318 makes tor more at risk of remote crashes but safer against RCE or
17319 heartbleed bug category. We now try to explain this issue in a
17320 message from the configure script. Fixes bug 21290; bugfix
17323 o Minor bugfixes (controller):
17324 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
17325 20824; bugfix on 0.3.0.1-alpha.
17327 o Minor bugfixes (hidden service):
17328 - Clean up the code for expiring intro points with no associated
17329 circuits. It was causing, rarely, a service with some expiring
17330 introduction points to not open enough additional introduction
17331 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
17332 - Stop setting the torrc option HiddenServiceStatistics to "0" just
17333 because we're not a bridge or relay. Instead, we preserve whatever
17334 value the user set (or didn't set). Fixes bug 21150; bugfix
17336 - Resolve two possible underflows which could lead to creating and
17337 closing a lot of introduction point circuits in a non-stop loop.
17338 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
17340 o Minor bugfixes (portability):
17341 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
17342 It is supported by OpenBSD itself, and also by most OpenBSD
17343 variants (such as Bitrig). Fixes bug 20980; bugfix
17345 - When mapping a file of length greater than SIZE_MAX, do not
17346 silently truncate its contents. This issue could occur on 32 bit
17347 systems with large file support and files which are larger than 4
17348 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
17350 o Minor bugfixes (tor-resolve):
17351 - The tor-resolve command line tool now rejects hostnames over 255
17352 characters in length. Previously, it would silently truncate them,
17353 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
17354 Patch by "junglefowl".
17356 o Minor bugfixes (Windows services):
17357 - Be sure to initialize the monotonic time subsystem before using
17358 it, even when running as an NT service. Fixes bug 21356; bugfix
17362 Changes in version 0.3.0.2-alpha - 2017-01-23
17363 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
17364 cause relays and clients to crash, even if they were not built with
17365 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17366 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17367 version should upgrade.
17369 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
17370 time-to-live values, makes directory authorities enforce the 1-to-1
17371 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
17372 client-side onion service reachability bug, does better at selecting
17373 the set of fallback directories, and more.
17375 o Major bugfixes (security, also in 0.2.9.9):
17376 - Downgrade the "-ftrapv" option from "always on" to "only on when
17377 --enable-expensive-hardening is provided." This hardening option, like
17378 others, can turn survivable bugs into crashes--and having it on by
17379 default made a (relatively harmless) integer overflow bug into a
17380 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
17383 o Major features (security):
17384 - Change the algorithm used to decide DNS TTLs on client and server
17385 side, to better resist DNS-based correlation attacks like the
17386 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
17387 Feamster. Now relays only return one of two possible DNS TTL
17388 values, and clients are willing to believe DNS TTL values up to 3
17389 hours long. Closes ticket 19769.
17391 o Major features (directory authority, security):
17392 - The default for AuthDirPinKeys is now 1: directory authorities
17393 will reject relays where the RSA identity key matches a previously
17394 seen value, but the Ed25519 key has changed. Closes ticket 18319.
17396 o Major bugfixes (client, guard, crash):
17397 - In circuit_get_global_origin_list(), return the actual list of
17398 origin circuits. The previous version of this code returned the
17399 list of all the circuits, and could have caused strange bugs,
17400 including possible crashes. Fixes bug 21118; bugfix
17403 o Major bugfixes (client, onion service, also in 0.2.9.9):
17404 - Fix a client-side onion service reachability bug, where multiple
17405 socks requests to an onion service (or a single slow request)
17406 could cause us to mistakenly mark some of the service's
17407 introduction points as failed, and we cache that failure so
17408 eventually we run out and can't reach the service. Also resolves a
17409 mysterious "Remote server sent bogus reason code 65021" log
17410 warning. The bug was introduced in ticket 17218, where we tried to
17411 remember the circuit end reason as a uint16_t, which mangled
17412 negative values. Partially fixes bug 21056 and fixes bug 20307;
17413 bugfix on 0.2.8.1-alpha.
17415 o Major bugfixes (DNS):
17416 - Fix a bug that prevented exit nodes from caching DNS records for
17417 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
17419 o Minor features (controller):
17420 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
17421 shared-random values to the controller. Closes ticket 19925.
17423 o Minor features (entry guards):
17424 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
17425 break regression tests.
17426 - Require UseEntryGuards when UseBridges is set, in order to make
17427 sure bridges aren't bypassed. Resolves ticket 20502.
17429 o Minor features (fallback directories):
17430 - Select 200 fallback directories for each release. Closes
17432 - Allow 3 fallback relays per operator, which is safe now that we
17433 are choosing 200 fallback relays. Closes ticket 20912.
17434 - Exclude relays affected by bug 20499 from the fallback list.
17435 Exclude relays from the fallback list if they are running versions
17436 known to be affected by bug 20499, or if in our tests they deliver
17437 a stale consensus (i.e. one that expired more than 24 hours ago).
17438 Closes ticket 20539.
17439 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
17441 - Require fallback directories to have the same address and port for
17442 7 days (now that we have enough relays with this stability).
17443 Relays whose OnionOO stability timer is reset on restart by bug
17444 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
17445 this issue. Closes ticket 20880; maintains short-term fix
17447 - Require fallbacks to have flags for 90% of the time (weighted
17448 decaying average), rather than 95%. This allows at least 73% of
17449 clients to bootstrap in the first 5 seconds without contacting an
17450 authority. Part of ticket 18828.
17451 - Annotate updateFallbackDirs.py with the bandwidth and consensus
17452 weight for each candidate fallback. Closes ticket 20878.
17453 - Make it easier to change the output sort order of fallbacks.
17454 Closes ticket 20822.
17455 - Display the relay fingerprint when downloading consensuses from
17456 fallbacks. Closes ticket 20908.
17458 o Minor features (geoip, also in 0.2.9.9):
17459 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17462 o Minor features (next-gen onion service directories):
17463 - Remove the "EnableOnionServicesV3" consensus parameter that we
17464 introduced in 0.3.0.1-alpha: relays are now always willing to act
17465 as v3 onion service directories. Resolves ticket 19899.
17467 o Minor features (linting):
17468 - Enhance the changes file linter to warn on Tor versions that are
17469 prefixed with "tor-". Closes ticket 21096.
17471 o Minor features (logging):
17472 - In several places, describe unset ed25519 keys as "<unset>",
17473 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
17475 o Minor bugfix (control protocol):
17476 - The reply to a "GETINFO config/names" request via the control
17477 protocol now spells the type "Dependent" correctly. This is a
17478 breaking change in the control protocol. (The field seems to be
17479 ignored by the most common known controllers.) Fixes bug 18146;
17480 bugfix on 0.1.1.4-alpha.
17482 o Minor bugfixes (bug resilience):
17483 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
17484 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
17485 Hans Jerry Illikainen.
17487 o Minor bugfixes (build):
17488 - Replace obsolete Autoconf macros with their modern equivalent and
17489 prevent similar issues in the future. Fixes bug 20990; bugfix
17492 o Minor bugfixes (client, guards):
17493 - Fix bug where Tor would think that there are circuits waiting for
17494 better guards even though those circuits have been freed. Fixes
17495 bug 21142; bugfix on 0.3.0.1-alpha.
17497 o Minor bugfixes (config):
17498 - Don't assert on startup when trying to get the options list and
17499 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
17500 options so of course they aren't ready yet. Fixes bug 21062;
17501 bugfix on 0.2.9.3-alpha.
17503 o Minor bugfixes (controller):
17504 - Make the GETINFO interface for inquiring about entry guards
17505 support the new guards backend. Fixes bug 20823; bugfix
17508 o Minor bugfixes (dead code):
17509 - Remove a redundant check for PidFile changes at runtime in
17510 options_transition_allowed(): this check is already performed
17511 regardless of whether the sandbox is active. Fixes bug 21123;
17512 bugfix on 0.2.5.4-alpha.
17514 o Minor bugfixes (documentation):
17515 - Update the tor manual page to document every option that can not
17516 be changed while tor is running. Fixes bug 21122.
17518 o Minor bugfixes (fallback directories):
17519 - Stop failing when a relay has no uptime data in
17520 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
17521 - Avoid checking fallback candidates' DirPorts if they are down in
17522 OnionOO. When a relay operator has multiple relays, this
17523 prioritizes relays that are up over relays that are down. Fixes
17524 bug 20926; bugfix on 0.2.8.3-alpha.
17525 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
17526 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
17528 o Minor bugfixes (guards, bootstrapping):
17529 - When connecting to a directory guard during bootstrap, do not mark
17530 the guard as successful until we receive a good-looking directory
17531 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
17533 o Minor bugfixes (onion services):
17534 - Fix the config reload pruning of old vs new services so it
17535 actually works when both ephemeral and non-ephemeral services are
17536 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
17537 - Allow the number of introduction points to be as low as 0, rather
17538 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
17540 o Minor bugfixes (IPv6):
17541 - Make IPv6-using clients try harder to find an IPv6 directory
17542 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
17543 - When IPv6 addresses have not been downloaded yet (microdesc
17544 consensus documents don't list relay IPv6 addresses), use hard-
17545 coded addresses for authorities, fallbacks, and configured
17546 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
17547 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
17549 o Minor bugfixes (memory leaks):
17550 - Fix a memory leak when configuring hidden services. Fixes bug
17551 20987; bugfix on 0.3.0.1-alpha.
17553 o Minor bugfixes (portability, also in 0.2.9.9):
17554 - Avoid crashing when Tor is built using headers that contain
17555 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17556 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17558 - Fix Libevent detection on platforms without Libevent 1 headers
17559 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17561 o Minor bugfixes (relay):
17562 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
17563 initializing the keys would reset the DataDirectory to 0700
17564 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
17565 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
17567 o Minor bugfixes (testing):
17568 - Remove undefined behavior from the backtrace generator by removing
17569 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
17571 o Minor bugfixes (unit tests):
17572 - Allow the unit tests to pass even when DNS lookups of bogus
17573 addresses do not fail as expected. Fixes bug 20862 and 20863;
17574 bugfix on unit tests introduced in 0.2.8.1-alpha
17575 through 0.2.9.4-alpha.
17577 o Code simplification and refactoring:
17578 - Refactor code to manipulate global_origin_circuit_list into
17579 separate functions. Closes ticket 20921.
17581 o Documentation (formatting):
17582 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
17583 blocks were incorrectly appearing. Closes ticket 20885.
17585 o Documentation (man page):
17586 - Clarify many options in tor.1 and add some min/max values for
17587 HiddenService options. Closes ticket 21058.
17590 Changes in version 0.2.9.9 - 2017-01-23
17591 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
17592 cause relays and clients to crash, even if they were not built with
17593 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17594 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17595 version should upgrade.
17597 This release also resolves a client-side onion service reachability
17598 bug, and resolves a pair of small portability issues.
17600 o Major bugfixes (security):
17601 - Downgrade the "-ftrapv" option from "always on" to "only on when
17602 --enable-expensive-hardening is provided." This hardening option,
17603 like others, can turn survivable bugs into crashes -- and having
17604 it on by default made a (relatively harmless) integer overflow bug
17605 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
17606 bugfix on 0.2.9.1-alpha.
17608 o Major bugfixes (client, onion service):
17609 - Fix a client-side onion service reachability bug, where multiple
17610 socks requests to an onion service (or a single slow request)
17611 could cause us to mistakenly mark some of the service's
17612 introduction points as failed, and we cache that failure so
17613 eventually we run out and can't reach the service. Also resolves a
17614 mysterious "Remote server sent bogus reason code 65021" log
17615 warning. The bug was introduced in ticket 17218, where we tried to
17616 remember the circuit end reason as a uint16_t, which mangled
17617 negative values. Partially fixes bug 21056 and fixes bug 20307;
17618 bugfix on 0.2.8.1-alpha.
17620 o Minor features (geoip):
17621 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17624 o Minor bugfixes (portability):
17625 - Avoid crashing when Tor is built using headers that contain
17626 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17627 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17629 - Fix Libevent detection on platforms without Libevent 1 headers
17630 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17633 Changes in version 0.3.0.1-alpha - 2016-12-19
17634 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
17635 series. It strengthens Tor's link and circuit handshakes by
17636 identifying relays by their Ed25519 keys, improves the algorithm that
17637 clients use to choose and maintain their list of guards, and includes
17638 additional backend support for the next-generation hidden service
17639 design. It also contains numerous other small features and
17640 improvements to security, correctness, and performance.
17642 Below are the changes since 0.2.9.8.
17644 o Major features (guard selection algorithm):
17645 - Tor's guard selection algorithm has been redesigned from the
17646 ground up, to better support unreliable networks and restrictive
17647 sets of entry nodes, and to better resist guard-capture attacks by
17648 hostile local networks. Implements proposal 271; closes
17651 o Major features (next-generation hidden services):
17652 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
17653 prop224 aka "Next Generation Hidden Services". Service and clients
17654 don't use this functionality yet. Closes ticket 19043. Based on
17655 initial code by Alec Heifetz.
17656 - Relays now support the HSDir version 3 protocol, so that they can
17657 can store and serve v3 descriptors. This is part of the next-
17658 generation onion service work detailed in proposal 224. Closes
17661 o Major features (protocol, ed25519 identity keys):
17662 - Relays now use Ed25519 to prove their Ed25519 identities and to
17663 one another, and to clients. This algorithm is faster and more
17664 secure than the RSA-based handshake we've been doing until now.
17665 Implements the second big part of proposal 220; Closes
17667 - Clients now support including Ed25519 identity keys in the EXTEND2
17668 cells they generate. By default, this is controlled by a consensus
17669 parameter, currently disabled. You can turn this feature on for
17670 testing by setting ExtendByEd25519ID in your configuration. This
17671 might make your traffic appear different than the traffic
17672 generated by other users, however. Implements part of ticket
17673 15056; part of proposal 220.
17674 - Relays now understand requests to extend to other relays by their
17675 Ed25519 identity keys. When an Ed25519 identity key is included in
17676 an EXTEND2 cell, the relay will only extend the circuit if the
17677 other relay can prove ownership of that identity. Implements part
17678 of ticket 15056; part of proposal 220.
17680 o Major bugfixes (scheduler):
17681 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
17682 caused the channel scheduler to behave more or less randomly,
17683 rather than preferring channels with higher-priority circuits.
17684 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
17686 o Minor features (controller):
17687 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
17688 rather than "unrecognized." Closes ticket 20389; patch from
17691 o Minor features (diagnostic, directory client):
17692 - Warn when we find an unexpected inconsistency in directory
17693 download status objects. Prevents some negative consequences of
17696 o Minor features (directory authority):
17697 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
17698 default) to control whether authorities should try to probe relays
17699 by their Ed25519 link keys. This option will go away in a few
17700 releases--unless we encounter major trouble in our ed25519 link
17701 protocol rollout, in which case it will serve as a safety option.
17703 o Minor features (directory cache):
17704 - Relays and bridges will now refuse to serve the consensus they
17705 have if they know it is too old for a client to use. Closes
17708 o Minor features (ed25519 link handshake):
17709 - Advertise support for the ed25519 link handshake using the
17710 subprotocol-versions mechanism, so that clients can tell which
17711 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
17713 o Minor features (fingerprinting resistance, authentication):
17714 - Extend the length of RSA keys used for TLS link authentication to
17715 2048 bits. (These weren't used for forward secrecy; for forward
17716 secrecy, we used P256.) Closes ticket 13752.
17718 o Minor features (infrastructure):
17719 - Implement smartlist_add_strdup() function. Replaces the use of
17720 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
17722 o Minor bugfixes (client):
17723 - When clients that use bridges start up with a cached consensus on
17724 disk, they were ignoring it and downloading a new one. Now they
17725 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
17727 o Minor bugfixes (configuration):
17728 - Accept non-space whitespace characters after the severity level in
17729 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
17730 - Support "TByte" and "TBytes" units in options given in bytes.
17731 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
17732 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
17734 o Minor bugfixes (consensus weight):
17735 - Add new consensus method that initializes bw weights to 1 instead
17736 of 0. This prevents a zero weight from making it all the way to
17737 the end (happens in small testing networks) and causing an error.
17738 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
17740 o Minor bugfixes (descriptors):
17741 - Correctly recognise downloaded full descriptors as valid, even
17742 when using microdescriptors as circuits. This affects clients with
17743 FetchUselessDescriptors set, and may affect directory authorities.
17744 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
17746 o Minor bugfixes (directory system):
17747 - Download all consensus flavors, descriptors, and authority
17748 certificates when FetchUselessDescriptors is set, regardless of
17749 whether tor is a directory cache or not. Fixes bug 20667; bugfix
17750 on all recent tor versions.
17751 - Bridges and relays now use microdescriptors (like clients do)
17752 rather than old-style router descriptors. Now bridges will blend
17753 in with clients in terms of the circuits they build. Fixes bug
17754 6769; bugfix on 0.2.3.2-alpha.
17756 o Minor bugfixes (ed25519 certificates):
17757 - Correctly interpret ed25519 certificates that would expire some
17758 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
17760 o Minor bugfixes (hidden services):
17761 - Stop ignoring misconfigured hidden services. Instead, refuse to
17762 start tor until the misconfigurations have been corrected. Fixes
17763 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
17766 o Minor bugfixes (memory leak at exit):
17767 - Fix a small harmless memory leak at exit of the previously unused
17768 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
17771 o Minor bugfixes (util):
17772 - When finishing writing a file to disk, if we were about to replace
17773 the file with the temporary file created before and we fail to
17774 replace it, remove the temporary file so it doesn't stay on disk.
17775 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
17777 o Minor bugfixes (Windows):
17778 - Check for getpagesize before using it to mmap files. This fixes
17779 compilation in some MinGW environments. Fixes bug 20530; bugfix on
17780 0.1.2.1-alpha. Reported by "ice".
17782 o Code simplification and refactoring:
17783 - Abolish all global guard context in entrynodes.c; replace with new
17784 guard_selection_t structure as preparation for proposal 271.
17785 Closes ticket 19858.
17786 - Introduce rend_service_is_ephemeral() that tells if given onion
17787 service is ephemeral. Replace unclear NULL-checkings for service
17788 directory with this function. Closes ticket 20526.
17789 - Extract magic numbers in circuituse.c into defined variables.
17790 - Refactor circuit_is_available_for_use to remove unnecessary check.
17791 - Refactor circuit_predict_and_launch_new for readability and
17792 testability. Closes ticket 18873.
17793 - Refactor large if statement in purpose_needs_anonymity to use
17794 switch statement instead. Closes part of ticket 20077.
17795 - Refactor the hashing API to return negative values for errors, as
17796 is done as throughout the codebase. Closes ticket 20717.
17797 - Remove data structures that were used to index or_connection
17798 objects by their RSA identity digests. These structures are fully
17799 redundant with the similar structures used in the
17800 channel abstraction.
17801 - Remove duplicate code in the channel_write_*cell() functions.
17802 Closes ticket 13827; patch from Pingl.
17803 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
17804 use only purpose_needs_anonymity. Closes part of ticket 20077.
17805 - The code to generate and parse EXTEND and EXTEND2 cells has been
17806 replaced with code automatically generated by the
17810 - Include the "TBits" unit in Tor's man page. Fixes part of bug
17811 20622; bugfix on 0.2.5.1-alpha.
17812 - Change '1' to 'weight_scale' in consensus bw weights calculation
17813 comments, as that is reality. Closes ticket 20273. Patch
17815 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
17816 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
17818 - Stop the man page from incorrectly stating that HiddenServiceDir
17819 must already exist. Fixes 20486.
17820 - Clarify that when ClientRejectInternalAddresses is enabled (which
17821 is the default), multicast DNS hostnames for machines on the local
17822 network (of the form *.local) are also rejected. Closes
17825 o Removed features:
17826 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
17827 limit for relays running on a single IP applies to authority IP
17828 addresses as well as to non-authority IP addresses. Closes
17830 - The UseDirectoryGuards torrc option no longer exists: all users
17831 that use entry guards will also use directory guards. Related to
17832 proposal 271; implements part of ticket 20831.
17835 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
17836 from "overcaffeinated".
17837 - Perform the coding style checks when running the tests and fail
17838 when coding style violations are found. Closes ticket 5500.
17839 - Add tests for networkstatus_compute_bw_weights_v10.
17840 - Add unit tests circuit_predict_and_launch_new.
17841 - Extract dummy_origin_circuit_new so it can be used by other
17845 Changes in version 0.2.8.12 - 2016-12-19
17846 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
17847 below) where Tor clients could crash when attempting to visit a
17848 hostile hidden service. Clients are recommended to upgrade as packages
17849 become available for their systems.
17851 It also includes an updated list of fallback directories, backported
17854 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
17855 backported to 0.2.8 in the future.
17857 o Major bugfixes (parsing, security, backported from 0.2.9.8):
17858 - Fix a bug in parsing that could cause clients to read a single
17859 byte past the end of an allocated region. This bug could be used
17860 to cause hardened clients (built with --enable-expensive-hardening)
17861 to crash if they tried to visit a hostile hidden service. Non-
17862 hardened clients are only affected depending on the details of
17863 their platform's memory allocator. Fixes bug 21018; bugfix on
17864 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17865 2016-12-002 and as CVE-2016-1254.
17867 o Minor features (fallback directory list, backported from 0.2.9.8):
17868 - Replace the 81 remaining fallbacks of the 100 originally
17869 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17870 fallbacks (123 new, 54 existing, 27 removed) generated in December
17871 2016. Resolves ticket 20170.
17873 o Minor features (geoip, backported from 0.2.9.7-rc):
17874 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17878 Changes in version 0.2.9.8 - 2016-12-19
17879 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
17881 The Tor 0.2.9 series makes mandatory a number of security features
17882 that were formerly optional. It includes support for a new shared-
17883 randomness protocol that will form the basis for next generation
17884 hidden services, includes a single-hop hidden service mode for
17885 optimizing .onion services that don't actually want to be hidden,
17886 tries harder not to overload the directory authorities with excessive
17887 downloads, and supports a better protocol versioning scheme for
17888 improved compatibility with other implementations of the Tor protocol.
17890 And of course, there are numerous other bugfixes and improvements.
17892 This release also includes a fix for a medium-severity issue (bug
17893 21018 below) where Tor clients could crash when attempting to visit a
17894 hostile hidden service. Clients are recommended to upgrade as packages
17895 become available for their systems.
17897 Below are the changes since 0.2.9.7-rc. For a list of all changes
17898 since 0.2.8, see the ReleaseNotes file.
17900 o Major bugfixes (parsing, security):
17901 - Fix a bug in parsing that could cause clients to read a single
17902 byte past the end of an allocated region. This bug could be used
17903 to cause hardened clients (built with --enable-expensive-hardening)
17904 to crash if they tried to visit a hostile hidden service. Non-
17905 hardened clients are only affected depending on the details of
17906 their platform's memory allocator. Fixes bug 21018; bugfix on
17907 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17908 2016-12-002 and as CVE-2016-1254.
17910 o Minor features (fallback directory list):
17911 - Replace the 81 remaining fallbacks of the 100 originally
17912 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17913 fallbacks (123 new, 54 existing, 27 removed) generated in December
17914 2016. Resolves ticket 20170.
17917 Changes in version 0.2.9.7-rc - 2016-12-12
17918 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
17919 including a few that had prevented tests from passing on
17922 o Minor features (geoip):
17923 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17926 o Minor bugfix (build):
17927 - The current Git revision when building from a local repository is
17928 now detected correctly when using git worktrees. Fixes bug 20492;
17929 bugfix on 0.2.3.9-alpha.
17931 o Minor bugfixes (directory authority):
17932 - When computing old Tor protocol line version in protover, we were
17933 looking at 0.2.7.5 twice instead of a specific case for
17934 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
17936 o Minor bugfixes (download scheduling):
17937 - Resolve a "bug" warning when considering a download schedule whose
17938 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
17940 o Minor bugfixes (logging):
17941 - Downgrade a harmless log message about the
17942 pending_entry_connections list from "warn" to "info". Mitigates
17945 o Minor bugfixes (memory leak):
17946 - Fix a small memory leak when receiving AF_UNIX connections on a
17947 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
17948 - When moving a signed descriptor object from a source to an
17949 existing destination, free the allocated memory inside that
17950 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
17952 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
17953 - Fix a memory leak and use-after-free error when removing entries
17954 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
17955 0.2.5.5-alpha. Patch from "cypherpunks".
17957 o Minor bugfixes (portability):
17958 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
17959 Fixes bug 20935; bugfix on 0.2.9.6-rc.
17961 o Minor bugfixes (unit tests):
17962 - Stop expecting NetBSD unit tests to report success for ipfw. Part
17963 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
17964 - Fix tolerances in unit tests for monotonic time comparisons
17965 between nanoseconds and microseconds. Previously, we accepted a 10
17966 us difference only, which is not realistic on every platform's
17967 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
17968 - Remove a double-free in the single onion service unit test. Stop
17969 ignoring a return value. Make future changes less error-prone.
17970 Fixes bug 20864; bugfix on 0.2.9.6-rc.
17973 Changes in version 0.2.8.11 - 2016-12-08
17974 Tor 0.2.8.11 backports fixes for additional portability issues that
17975 could prevent Tor from building correctly on OSX Sierra, or with
17976 OpenSSL 1.1. Affected users should upgrade; others can safely stay
17979 o Minor bugfixes (portability):
17980 - Avoid compilation errors when building on OSX Sierra. Sierra began
17981 to support the getentropy() and clock_gettime() APIs, but created
17982 a few problems in doing so. Tor 0.2.9 has a more thorough set of
17983 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
17984 monotonic time interfaces. Fixes bug 20865. Bugfix
17987 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17988 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17989 architectures. Closes ticket 20588.
17992 Changes in version 0.2.8.10 - 2016-12-02
17993 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
17994 unusable after they left standby mode. It also backports fixes for
17995 a few portability issues and a small but problematic memory leak.
17997 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
17998 - When Tor leaves standby because of a new application request, open
17999 circuits as needed to serve that request. Previously, we would
18000 potentially wait a very long time. Fixes part of bug 19969; bugfix
18003 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
18004 - Clients now respond to new application stream requests immediately
18005 when they arrive, rather than waiting up to one second before
18006 starting to handle them. Fixes part of bug 19969; bugfix
18009 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
18010 - Work around a bug in the OSX 10.12 SDK that would prevent us from
18011 successfully targeting earlier versions of OSX. Resolves
18014 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
18015 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
18016 20551; bugfix on 0.2.1.1-alpha.
18018 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
18019 - Work around a memory leak in OpenSSL 1.1 when encoding public
18020 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
18022 o Minor features (geoip):
18023 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
18026 Changes in version 0.2.9.6-rc - 2016-12-02
18027 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
18028 version. We hope that it will be ready to become stable soon, and we
18029 encourage everyone to test this release. If no showstopper bugs are
18030 found here, the next 0.2.9 release will be stable.
18032 o Major bugfixes (relay, resolver, logging):
18033 - For relays that don't know their own address, avoid attempting a
18034 local hostname resolve for each descriptor we download. This
18035 will cut down on the number of "Success: chose address 'x.x.x.x'"
18036 log lines, and also avoid confusing clock jumps if the resolver
18037 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
18039 o Minor bugfixes (client, fascistfirewall):
18040 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
18041 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
18043 o Minor bugfixes (hidden services):
18044 - Stop ignoring the anonymity status of saved keys for hidden
18045 services and single onion services when first starting tor.
18046 Instead, refuse to start tor if any hidden service key has been
18047 used in a different hidden service anonymity mode. Fixes bug
18048 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
18050 o Minor bugfixes (portability):
18051 - Work around a bug in the OSX 10.12 SDK that would prevent us from
18052 successfully targeting earlier versions of OSX. Resolves
18054 - Run correctly when built on Windows build environments that
18055 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
18057 o Minor bugfixes (single onion services, Tor2web):
18058 - Stop complaining about long-term one-hop circuits deliberately
18059 created by single onion services and Tor2web. These log messages
18060 are intended to diagnose issue 8387, which relates to circuits
18061 hanging around forever for no reason. Fixes bug 20613; bugfix on
18062 0.2.9.1-alpha. Reported by "pastly".
18064 o Minor bugfixes (unit tests):
18065 - Stop spurious failures in the local interface address discovery
18066 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
18070 - Correct the minimum bandwidth value in torrc.sample, and queue a
18071 corresponding change for torrc.minimal. Closes ticket 20085.
18074 Changes in version 0.2.9.5-alpha - 2016-11-08
18075 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
18076 version. We believe one or two probably remain, and we encourage
18077 everyone to test this release.
18079 o Major bugfixes (client performance):
18080 - Clients now respond to new application stream requests immediately
18081 when they arrive, rather than waiting up to one second before
18082 starting to handle them. Fixes part of bug 19969; bugfix
18085 o Major bugfixes (client reliability):
18086 - When Tor leaves standby because of a new application request, open
18087 circuits as needed to serve that request. Previously, we would
18088 potentially wait a very long time. Fixes part of bug 19969; bugfix
18091 o Major bugfixes (download scheduling):
18092 - When using an exponential backoff schedule, do not give up on
18093 downloading just because we have failed a bunch of times. Since
18094 each delay is longer than the last, retrying indefinitely won't
18095 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
18096 - If a consensus expires while we are waiting for certificates to
18097 download, stop waiting for certificates.
18098 - If we stop waiting for certificates less than a minute after we
18099 started downloading them, do not consider the certificate download
18100 failure a separate failure. Fixes bug 20533; bugfix
18102 - Remove the maximum delay on exponential-backoff scheduling. Since
18103 we now allow an infinite number of failures (see ticket 20536), we
18104 must now allow the time to grow longer on each failure. Fixes part
18105 of bug 20534; bugfix on 0.2.9.1-alpha.
18106 - Make our initial download delays closer to those from 0.2.8. Fixes
18107 another part of bug 20534; bugfix on 0.2.9.1-alpha.
18108 - When determining when to download a directory object, handle times
18109 after 2038 if the operating system supports them. (Someday this
18110 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
18111 - When using exponential backoff in test networks, use a lower
18112 exponent, so the delays do not vary as much. This helps test
18113 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
18115 o Minor features (geoip):
18116 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
18119 o Minor bugfixes (client directory scheduling):
18120 - Treat "relay too busy to answer request" as a failed request and a
18121 reason to back off on our retry frequency. This is safe now that
18122 exponential backoffs retry indefinitely, and avoids a bug where we
18123 would reset our download schedule erroneously. Fixes bug 20593;
18124 bugfix on 0.2.9.1-alpha.
18126 o Minor bugfixes (client, logging):
18127 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
18128 assume all nodes support EXTEND2. Use ntor whenever a key is
18129 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
18130 - On DNSPort, stop logging a BUG warning on a failed hostname
18131 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
18133 o Minor bugfixes (hidden services):
18134 - When configuring hidden services, check every hidden service
18135 directory's permissions. Previously, we only checked the last
18136 hidden service. Fixes bug 20529; bugfix the work to fix 13942
18139 o Minor bugfixes (portability):
18140 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
18141 architectures. Closes ticket 20588.
18142 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
18143 removed the ECDH ciphers which caused the tests to fail on
18144 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
18145 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
18146 20551; bugfix on 0.2.1.1-alpha.
18148 o Minor bugfixes (relay bootstrap):
18149 - Ensure relays don't make multiple connections during bootstrap.
18150 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
18152 o Minor bugfixes (relay):
18153 - Work around a memory leak in OpenSSL 1.1 when encoding public
18154 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
18155 - Avoid a small memory leak when informing worker threads about
18156 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
18157 - Do not try to parallelize workers more than 16x without the user
18158 explicitly configuring us to do so, even if we do detect more than
18159 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
18161 o Minor bugfixes (single onion services):
18162 - Start correctly when creating a single onion service in a
18163 directory that did not previously exist. Fixes bug 20484; bugfix
18166 o Minor bugfixes (testing):
18167 - Avoid a unit test failure on systems with over 16 detectable CPU
18168 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
18171 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
18172 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
18173 - Module-level documentation for several more modules. Closes
18174 tickets 19287 and 19290.
18177 Changes in version 0.2.8.9 - 2016-10-17
18178 Tor 0.2.8.9 backports a fix for a security hole in previous versions
18179 of Tor that would allow a remote attacker to crash a Tor client,
18180 hidden service, relay, or authority. All Tor users should upgrade to
18181 this version, or to 0.2.9.4-alpha. Patches will be released for older
18184 o Major features (security fixes, also in 0.2.9.4-alpha):
18185 - Prevent a class of security bugs caused by treating the contents
18186 of a buffer chunk as if they were a NUL-terminated string. At
18187 least one such bug seems to be present in all currently used
18188 versions of Tor, and would allow an attacker to remotely crash
18189 most Tor instances, especially those compiled with extra compiler
18190 hardening. With this defense in place, such bugs can't crash Tor,
18191 though we should still fix them as they occur. Closes ticket
18192 20384 (TROVE-2016-10-001).
18194 o Minor features (geoip):
18195 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
18199 Changes in version 0.2.9.4-alpha - 2016-10-17
18200 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
18201 that would allow a remote attacker to crash a Tor client, hidden
18202 service, relay, or authority. All Tor users should upgrade to this
18203 version, or to 0.2.8.9. Patches will be released for older versions
18206 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
18207 previous versions of Tor, including the implementation of a feature to
18208 future- proof the Tor ecosystem against protocol changes, some bug
18209 fixes necessary for Tor Browser to use unix domain sockets correctly,
18210 and several portability improvements. We anticipate that this will be
18211 the last alpha in the Tor 0.2.9 series, and that the next release will
18212 be a release candidate.
18214 o Major features (security fixes):
18215 - Prevent a class of security bugs caused by treating the contents
18216 of a buffer chunk as if they were a NUL-terminated string. At
18217 least one such bug seems to be present in all currently used
18218 versions of Tor, and would allow an attacker to remotely crash
18219 most Tor instances, especially those compiled with extra compiler
18220 hardening. With this defense in place, such bugs can't crash Tor,
18221 though we should still fix them as they occur. Closes ticket
18222 20384 (TROVE-2016-10-001).
18224 o Major features (subprotocol versions):
18225 - Tor directory authorities now vote on a set of recommended
18226 subprotocol versions, and on a set of required subprotocol
18227 versions. Clients and relays that lack support for a _required_
18228 subprotocol version will not start; those that lack support for a
18229 _recommended_ subprotocol version will warn the user to upgrade.
18230 Closes ticket 19958; implements part of proposal 264.
18231 - Tor now uses "subprotocol versions" to indicate compatibility.
18232 Previously, versions of Tor looked at the declared Tor version of
18233 a relay to tell whether they could use a given feature. Now, they
18234 should be able to rely on its declared subprotocol versions. This
18235 change allows compatible implementations of the Tor protocol(s) to
18236 exist without pretending to be 100% bug-compatible with particular
18237 releases of Tor itself. Closes ticket 19958; implements part of
18240 o Minor feature (fallback directories):
18241 - Remove broken fallbacks from the hard-coded fallback directory
18242 list. Closes ticket 20190; patch by teor.
18244 o Minor features (client, directory):
18245 - Since authorities now omit all routers that lack the Running and
18246 Valid flags, we assume that any relay listed in the consensus must
18247 have those flags. Closes ticket 20001; implements part of
18250 o Minor features (compilation, portability):
18251 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
18254 o Minor features (development tools, etags):
18255 - Teach the "make tags" Makefile target how to correctly find
18256 "MOCK_IMPL" function definitions. Patch from nherring; closes
18259 o Minor features (geoip):
18260 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
18263 o Minor features (unix domain sockets):
18264 - When configuring a unix domain socket for a SocksPort,
18265 ControlPort, or Hidden service, you can now wrap the address in
18266 quotes, using C-style escapes inside the quotes. This allows unix
18267 domain socket paths to contain spaces.
18269 o Minor features (virtual addresses):
18270 - Increase the maximum number of bits for the IPv6 virtual network
18271 prefix from 16 to 104. In this way, the condition for address
18272 allocation is less restrictive. Closes ticket 20151; feature
18275 o Minor bugfixes (address discovery):
18276 - Stop reordering IP addresses returned by the OS. This makes it
18277 more likely that Tor will guess the same relay IP address every
18278 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
18279 Reported by René Mayrhofer, patch by "cypherpunks".
18281 o Minor bugfixes (client, unix domain sockets):
18282 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
18283 the client address is meaningless. Fixes bug 20261; bugfix
18286 o Minor bugfixes (compilation, OpenBSD):
18287 - Detect Libevent2 functions correctly on systems that provide
18288 libevent2, but where libevent1 is linked with -levent. Fixes bug
18289 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
18291 o Minor bugfixes (configuration):
18292 - When parsing quoted configuration values from the torrc file,
18293 handle windows line endings correctly. Fixes bug 19167; bugfix on
18294 0.2.0.16-alpha. Patch from "Pingl".
18296 o Minor bugfixes (getpass):
18297 - Defensively fix a non-triggerable heap corruption at do_getpass()
18298 to protect ourselves from mistakes in the future. Fixes bug
18299 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
18302 o Minor bugfixes (hidden service):
18303 - Allow hidden services to run on IPv6 addresses even when the
18304 IPv6Exit option is not set. Fixes bug 18357; bugfix
18308 - Add module-level internal documentation for 36 C files that
18309 previously didn't have a high-level overview. Closes ticket #20385.
18311 o Required libraries:
18312 - When building with OpenSSL, Tor now requires version 1.0.1 or
18313 later. OpenSSL 1.0.0 and earlier are no longer supported by the
18314 OpenSSL team, and should not be used. Closes ticket 20303.
18317 Changes in version 0.2.9.3-alpha - 2016-09-23
18318 Tor 0.2.9.3-alpha adds improved support for entities that want to make
18319 high-performance services available through the Tor .onion mechanism
18320 without themselves receiving anonymity as they host those services. It
18321 also tries harder to ensure that all steps on a circuit are using the
18322 strongest crypto possible, strengthens some TLS properties, and
18323 resolves several bugs -- including a pair of crash bugs from the 0.2.8
18324 series. Anybody running an earlier version of 0.2.9.x should upgrade.
18326 o Major bugfixes (crash, also in 0.2.8.8):
18327 - Fix a complicated crash bug that could affect Tor clients
18328 configured to use bridges when replacing a networkstatus consensus
18329 in which one of their bridges was mentioned. OpenBSD users saw
18330 more crashes here, but all platforms were potentially affected.
18331 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18333 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
18334 - Fix a timing-dependent assertion failure that could occur when we
18335 tried to flush from a circuit after having freed its cells because
18336 of an out-of-memory condition. Fixes bug 20203; bugfix on
18337 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18340 o Major features (circuit building, security):
18341 - Authorities, relays and clients now require ntor keys in all
18342 descriptors, for all hops (except for rare hidden service protocol
18343 cases), for all circuits, and for all other roles. Part of
18345 - Tor authorities, relays, and clients only use ntor, except for
18346 rare cases in the hidden service protocol. Part of ticket 19163.
18348 o Major features (single-hop "hidden" services):
18349 - Add experimental HiddenServiceSingleHopMode and
18350 HiddenServiceNonAnonymousMode options. When both are set to 1,
18351 every hidden service on a Tor instance becomes a non-anonymous
18352 Single Onion Service. Single Onions make one-hop (direct)
18353 connections to their introduction and rendezvous points. One-hop
18354 circuits make Single Onion servers easily locatable, but clients
18355 remain location-anonymous. This is compatible with the existing
18356 hidden service implementation, and works on the current tor
18357 network without any changes to older relays or clients. Implements
18358 proposal 260, completes ticket 17178. Patch by teor and asn.
18360 o Major features (resource management):
18361 - Tor can now notice it is about to run out of sockets, and
18362 preemptively close connections of lower priority. (This feature is
18363 off by default for now, since the current prioritizing method is
18364 yet not mature enough. You can enable it by setting
18365 "DisableOOSCheck 0", but watch out: it might close some sockets
18366 you would rather have it keep.) Closes ticket 18640.
18368 o Major bugfixes (circuit building):
18369 - Hidden service client-to-intro-point and service-to-rendezvous-
18370 point circuits use the TAP key supplied by the protocol, to avoid
18371 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
18373 o Major bugfixes (compilation, OpenBSD):
18374 - Fix a Libevent-detection bug in our autoconf script that would
18375 prevent Tor from linking successfully on OpenBSD. Patch from
18376 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
18378 o Major bugfixes (hidden services):
18379 - Clients now require hidden services to include the TAP keys for
18380 their intro points in the hidden service descriptor. This prevents
18381 an inadvertent upgrade to ntor, which a malicious hidden service
18382 could use to distinguish clients by consensus version. Fixes bug
18383 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
18385 o Minor features (security, TLS):
18386 - Servers no longer support clients that without AES ciphersuites.
18387 (3DES is no longer considered an acceptable cipher.) We believe
18388 that no such Tor clients currently exist, since Tor has required
18389 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
18391 o Minor feature (fallback directories):
18392 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18393 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18394 2016. Closes ticket 20190; patch by teor.
18396 o Minor features (geoip, also in 0.2.8.8):
18397 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18400 o Minor feature (port flags):
18401 - Add new flags to the *Port options to finer control over which
18402 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
18403 and the synthetic flag OnionTrafficOnly, which is equivalent to
18404 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
18405 18693; patch by "teor".
18407 o Minor features (directory authority):
18408 - After voting, if the authorities decide that a relay is not
18409 "Valid", they no longer include it in the consensus at all. Closes
18410 ticket 20002; implements part of proposal 272.
18412 o Minor features (testing):
18413 - Disable memory protections on OpenBSD when performing our unit
18414 tests for memwipe(). The test deliberately invokes undefined
18415 behavior, and the OpenBSD protections interfere with this. Patch
18416 from "rubiate". Closes ticket 20066.
18418 o Minor features (testing, ipv6):
18419 - Add the single-onion and single-onion-ipv6 chutney targets to
18420 "make test-network-all". This requires a recent chutney version
18421 with the single onion network flavours (git c72a652 or later).
18422 Closes ticket 20072; patch by teor.
18423 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
18424 tests. Remove bridges+hs, as it's somewhat redundant. This
18425 requires a recent chutney version that supports IPv6 clients,
18426 relays, and authorities. Closes ticket 20069; patch by teor.
18428 o Minor features (Tor2web):
18429 - Make Tor2web clients respect ReachableAddresses. This feature was
18430 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
18431 0.2.8.7. Implements feature 20034. Patch by teor.
18433 o Minor features (unit tests):
18434 - We've done significant work to make the unit tests run faster.
18435 - Our link-handshake unit tests now check that when invalid
18436 handshakes fail, they fail with the error messages we expected.
18437 - Our unit testing code that captures log messages no longer
18438 prevents them from being written out if the user asked for them
18439 (by passing --debug or --info or or --notice --warn to the "test"
18440 binary). This change prevents us from missing unexpected log
18441 messages simply because we were looking for others. Related to
18443 - The unit tests now log all warning messages with the "BUG" flag.
18444 Previously, they only logged errors by default. This change will
18445 help us make our testing code more correct, and make sure that we
18446 only hit this code when we mean to. In the meantime, however,
18447 there will be more warnings in the unit test logs than before.
18448 This is preparatory work for ticket 19999.
18449 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
18450 assertion as a test failure.
18452 o Minor bug fixes (circuits):
18453 - Use the CircuitBuildTimeout option whenever
18454 LearnCircuitBuildTimeout is disabled. Previously, we would respect
18455 the option when a user disabled it, but not when it was disabled
18456 because some other option was set. Fixes bug 20073; bugfix on
18457 0.2.4.12-alpha. Patch by teor.
18459 o Minor bugfixes (allocation):
18460 - Change how we allocate memory for large chunks on buffers, to
18461 avoid a (currently impossible) integer overflow, and to waste less
18462 space when allocating unusually large chunks. Fixes bug 20081;
18463 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
18464 - Always include orconfig.h before including any other C headers.
18465 Sometimes, it includes macros that affect the behavior of the
18466 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
18467 first version to use AC_USE_SYSTEM_EXTENSIONS).
18468 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
18469 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
18470 Patch from Gisle Vanem.
18471 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
18472 They apparently require a set of annotations that we aren't
18473 currently using, and they create false positives in our pthreads
18474 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
18476 o Minor bugfixes (directory authority):
18477 - Die with a more useful error when the operator forgets to place
18478 the authority_signing_key file into the keys directory. This
18479 avoids an uninformative assert & traceback about having an invalid
18480 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
18481 - When allowing private addresses, mark Exits that only exit to
18482 private locations as such. Fixes bug 20064; bugfix
18485 o Minor bugfixes (documentation):
18486 - Document the default PathsNeededToBuildCircuits value that's used
18487 by clients when the directory authorities don't set
18488 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
18489 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
18490 - Fix manual for the User option: it takes a username, not a UID.
18491 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
18494 o Minor bugfixes (hidden services):
18495 - Stop logging intro point details to the client log on certain
18496 error conditions. Fixed as part of bug 20012; bugfix on
18497 0.2.4.8-alpha. Patch by teor.
18499 o Minor bugfixes (IPv6, testing):
18500 - Check for IPv6 correctly on Linux when running test networks.
18501 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
18503 o Minor bugfixes (Linux seccomp2 sandbox):
18504 - Add permission to run the sched_yield() and sigaltstack() system
18505 calls, in order to support versions of Tor compiled with asan or
18506 ubsan code that use these calls. Now "sandbox 1" and
18507 "--enable-expensive-hardening" should be compatible on more
18508 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
18510 o Minor bugfixes (logging):
18511 - When logging a message from the BUG() macro, be explicit about
18512 what we were asserting. Previously we were confusing what we were
18513 asserting with what the bug was. Fixes bug 20093; bugfix
18515 - When we are unable to remove the bw_accounting file, do not warn
18516 if the reason we couldn't remove it was that it didn't exist.
18517 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
18519 o Minor bugfixes (option parsing):
18520 - Count unix sockets when counting client listeners (SOCKS, Trans,
18521 NATD, and DNS). This has no user-visible behaviour changes: these
18522 options are set once, and never read. Required for correct
18523 behaviour in ticket 17178. Fixes bug 19677; bugfix on
18524 0.2.6.3-alpha. Patch by teor.
18526 o Minor bugfixes (options):
18527 - Check the consistency of UseEntryGuards and EntryNodes more
18528 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
18530 - Stop changing the configured value of UseEntryGuards on
18531 authorities and Tor2web clients. Fixes bug 20074; bugfix on
18532 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
18535 o Minor bugfixes (Tor2web):
18536 - Prevent Tor2web clients running hidden services, these services
18537 are not anonymous due to the one-hop client paths. Fixes bug
18538 19678. Patch by teor.
18540 o Minor bugfixes (unit tests):
18541 - Fix a shared-random unit test that was failing on big endian
18542 architectures due to internal representation of a integer copied
18543 to a buffer. The test is changed to take a full 32 bytes of data
18544 and use the output of a python script that make the COMMIT and
18545 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
18547 - The tor_tls_server_info_callback unit test no longer crashes when
18548 debug-level logging is turned on. Fixes bug 20041; bugfix
18552 Changes in version 0.2.8.8 - 2016-09-23
18553 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
18554 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
18555 who select public relays as their bridges.
18557 o Major bugfixes (crash):
18558 - Fix a complicated crash bug that could affect Tor clients
18559 configured to use bridges when replacing a networkstatus consensus
18560 in which one of their bridges was mentioned. OpenBSD users saw
18561 more crashes here, but all platforms were potentially affected.
18562 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18564 o Major bugfixes (relay, OOM handler):
18565 - Fix a timing-dependent assertion failure that could occur when we
18566 tried to flush from a circuit after having freed its cells because
18567 of an out-of-memory condition. Fixes bug 20203; bugfix on
18568 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18571 o Minor feature (fallback directories):
18572 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18573 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18574 2016. Closes ticket 20190; patch by teor.
18576 o Minor features (geoip):
18577 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18581 Changes in version 0.2.9.2-alpha - 2016-08-24
18582 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
18583 several new features and bugfixes. It also includes an important
18584 authority update and an important bugfix from 0.2.8.7. Everyone who
18585 sets the ReachableAddresses option, and all bridges, are strongly
18586 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
18588 o Directory authority changes (also in 0.2.8.7):
18589 - The "Tonga" bridge authority has been retired; the new bridge
18590 authority is "Bifroest". Closes tickets 19728 and 19690.
18592 o Major bugfixes (client, security, also in 0.2.8.7):
18593 - Only use the ReachableAddresses option to restrict the first hop
18594 in a path. In earlier versions of 0.2.8.x, it would apply to
18595 every hop in the path, with a possible degradation in anonymity
18596 for anyone using an uncommon ReachableAddress setting. Fixes bug
18597 19973; bugfix on 0.2.8.2-alpha.
18599 o Major features (user interface):
18600 - Tor now supports the ability to declare options deprecated, so
18601 that we can recommend that people stop using them. Previously,
18602 this was done in an ad-hoc way. Closes ticket 19820.
18604 o Major bugfixes (directory downloads):
18605 - Avoid resetting download status for consensuses hourly, since we
18606 already have another, smarter retry mechanism. Fixes bug 8625;
18607 bugfix on 0.2.0.9-alpha.
18609 o Minor features (config):
18610 - Warn users when descriptor and port addresses are inconsistent.
18611 Mitigates bug 13953; patch by teor.
18613 o Minor features (geoip):
18614 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18617 o Minor features (user interface):
18618 - There is a new --list-deprecated-options command-line option to
18619 list all of the deprecated options. Implemented as part of
18622 o Minor bugfixes (code style):
18623 - Fix an integer signedness conversion issue in the case conversion
18624 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
18626 o Minor bugfixes (compilation):
18627 - Build correctly on versions of libevent2 without support for
18628 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
18630 - Fix a compilation warning on GCC versions before 4.6. Our
18631 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
18632 when it is also required as an argument to the compiler pragma.
18633 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
18635 o Minor bugfixes (compilation, also in 0.2.8.7):
18636 - Remove an inappropriate "inline" in tortls.c that was causing
18637 warnings on older versions of GCC. Fixes bug 19903; bugfix
18640 o Minor bugfixes (fallback directories, also in 0.2.8.7):
18641 - Avoid logging a NULL string pointer when loading fallback
18642 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18643 and 0.2.8.1-alpha. Report and patch by "rubiate".
18645 o Minor bugfixes (logging):
18646 - Log a more accurate message when we fail to dump a microdescriptor.
18647 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
18649 o Minor bugfixes (memory leak):
18650 - Fix a series of slow memory leaks related to parsing torrc files
18651 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
18653 o Deprecated features:
18654 - A number of DNS-cache-related sub-options for client ports are now
18655 deprecated for security reasons, and may be removed in a future
18656 version of Tor. (We believe that client-side DNS caching is a bad
18657 idea for anonymity, and you should not turn it on.) The options
18658 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
18659 UseIPv4Cache, and UseIPv6Cache.
18660 - A number of options are deprecated for security reasons, and may
18661 be removed in a future version of Tor. The options are:
18662 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
18663 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
18664 CloseHSClientCircuitsImmediatelyOnTimeout,
18665 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
18666 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
18667 UseNTorHandshake, and WarnUnsafeSocks.
18668 - The *ListenAddress options are now deprecated as unnecessary: the
18669 corresponding *Port options should be used instead. These options
18670 may someday be removed. The affected options are:
18671 ControlListenAddress, DNSListenAddress, DirListenAddress,
18672 NATDListenAddress, ORListenAddress, SocksListenAddress,
18673 and TransListenAddress.
18676 - Correct the IPv6 syntax in our documentation for the
18677 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
18680 - We no longer include the (dead, deprecated) bufferevent code in
18681 Tor. Closes ticket 19450. Based on a patch from U+039b.
18684 Changes in version 0.2.8.7 - 2016-08-24
18685 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
18686 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
18687 who sets the ReachableAddresses option, and all bridges, are strongly
18688 encouraged to upgrade.
18690 o Directory authority changes:
18691 - The "Tonga" bridge authority has been retired; the new bridge
18692 authority is "Bifroest". Closes tickets 19728 and 19690.
18694 o Major bugfixes (client, security):
18695 - Only use the ReachableAddresses option to restrict the first hop
18696 in a path. In earlier versions of 0.2.8.x, it would apply to
18697 every hop in the path, with a possible degradation in anonymity
18698 for anyone using an uncommon ReachableAddress setting. Fixes bug
18699 19973; bugfix on 0.2.8.2-alpha.
18701 o Minor features (geoip):
18702 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18705 o Minor bugfixes (compilation):
18706 - Remove an inappropriate "inline" in tortls.c that was causing
18707 warnings on older versions of GCC. Fixes bug 19903; bugfix
18710 o Minor bugfixes (fallback directories):
18711 - Avoid logging a NULL string pointer when loading fallback
18712 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18713 and 0.2.8.1-alpha. Report and patch by "rubiate".
18716 Changes in version 0.2.9.1-alpha - 2016-08-08
18717 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
18718 series. It improves our support for hardened builds and compiler
18719 warnings, deploys some critical infrastructure for improvements to
18720 hidden services, includes a new timing backend that we hope to use for
18721 better support for traffic padding, makes it easier for programmers to
18722 log unexpected events, and contains other small improvements to
18723 security, correctness, and performance.
18725 Below are the changes since 0.2.8.6.
18727 o New system requirements:
18728 - Tor now requires Libevent version 2.0.10-stable or later. Older
18729 versions of Libevent have less efficient backends for several
18730 platforms, and lack the DNS code that we use for our server-side
18731 DNS support. This implements ticket 19554.
18732 - Tor now requires zlib version 1.2 or later, for security,
18733 efficiency, and (eventually) gzip support. (Back when we started,
18734 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
18735 released in 2003. We recommend the latest version.)
18737 o Major features (build, hardening):
18738 - Tor now builds with -ftrapv by default on compilers that support
18739 it. This option detects signed integer overflow (which C forbids),
18740 and turns it into a hard-failure. We do not apply this option to
18741 code that needs to run in constant time to avoid side-channels;
18742 instead, we use -fwrapv in that code. Closes ticket 17983.
18743 - When --enable-expensive-hardening is selected, stop applying the
18744 clang/gcc sanitizers to code that needs to run in constant time.
18745 Although we are aware of no introduced side-channels, we are not
18746 able to prove that there are none. Related to ticket 17983.
18748 o Major features (compilation):
18749 - Our big list of extra GCC warnings is now enabled by default when
18750 building with GCC (or with anything like Clang that claims to be
18751 GCC-compatible). To make all warnings into fatal compilation
18752 errors, pass --enable-fatal-warnings to configure. Closes
18754 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
18755 turn on C and POSIX extensions. (Previously, we attempted to do
18756 this on an ad hoc basis.) Closes ticket 19139.
18758 o Major features (directory authorities, hidden services):
18759 - Directory authorities can now perform the shared randomness
18760 protocol specified by proposal 250. Using this protocol, directory
18761 authorities generate a global fresh random value every day. In the
18762 future, this value will be used by hidden services to select
18763 HSDirs. This release implements the directory authority feature;
18764 the hidden service side will be implemented in the future as part
18765 of proposal 224. Resolves ticket 16943; implements proposal 250.
18767 o Major features (downloading, random exponential backoff):
18768 - When we fail to download an object from a directory service, wait
18769 for an (exponentially increasing) randomized amount of time before
18770 retrying, rather than a fixed interval as we did before. This
18771 prevents a group of Tor instances from becoming too synchronized,
18772 or a single Tor instance from becoming too predictable, in its
18773 download schedule. Closes ticket 15942.
18775 o Major bugfixes (exit policies):
18776 - Avoid disclosing exit outbound bind addresses, configured port
18777 bind addresses, and local interface addresses in relay descriptors
18778 by default under ExitPolicyRejectPrivate. Instead, only reject
18779 these (otherwise unlisted) addresses if
18780 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
18781 0.2.7.2-alpha. Patch by teor.
18783 o Major bugfixes (hidden service client):
18784 - Allow Tor clients with appropriate controllers to work with
18785 FetchHidServDescriptors set to 0. Previously, this option also
18786 disabled descriptor cache lookup, thus breaking hidden services
18787 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
18789 o Minor features (build, hardening):
18790 - Detect and work around a libclang_rt problem that would prevent
18791 clang from finding __mulodi4() on some 32-bit platforms, and thus
18792 keep -ftrapv from linking on those systems. Closes ticket 19079.
18793 - When building on a system without runtime support for the runtime
18794 hardening options, try to log a useful warning at configuration
18795 time, rather than an incomprehensible warning at link time. If
18796 expensive hardening was requested, this warning becomes an error.
18797 Closes ticket 18895.
18799 o Minor features (code safety):
18800 - In our integer-parsing functions, ensure that maxiumum value we
18801 give is no smaller than the minimum value. Closes ticket 19063;
18804 o Minor features (controller):
18805 - Implement new GETINFO queries for all downloads that use
18806 download_status_t to schedule retries. This allows controllers to
18807 examine the schedule for pending downloads. Closes ticket 19323.
18808 - Allow controllers to configure basic client authorization on
18809 hidden services when they create them with the ADD_ONION control
18810 command. Implements ticket 15588. Patch by "special".
18811 - Fire a STATUS_SERVER controller event whenever the hibernation
18812 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
18814 o Minor features (directory authority):
18815 - Directory authorities now only give the Guard flag to a relay if
18816 they are also giving it the Stable flag. This change allows us to
18817 simplify path selection for clients. It should have minimal effect
18818 in practice, since >99% of Guards already have the Stable flag.
18819 Implements ticket 18624.
18820 - Directory authorities now write their v3-status-votes file out to
18821 disk earlier in the consensus process, so we have a record of the
18822 votes even if we abort the consensus process. Resolves
18825 o Minor features (hidden service):
18826 - Stop being so strict about the payload length of "rendezvous1"
18827 cells. We used to be locked in to the "TAP" handshake length, and
18828 now we can handle better handshakes like "ntor". Resolves
18831 o Minor features (infrastructure, time):
18832 - Tor now uses the operating system's monotonic timers (where
18833 available) for internal fine-grained timing. Previously we would
18834 look at the system clock, and then attempt to compensate for the
18835 clock running backwards. Closes ticket 18908.
18836 - Tor now includes an improved timer backend, so that we can
18837 efficiently support tens or hundreds of thousands of concurrent
18838 timers, as will be needed for some of our planned anti-traffic-
18839 analysis work. This code is based on William Ahern's "timeout.c"
18840 project, which implements a "tickless hierarchical timing wheel".
18841 Closes ticket 18365.
18843 o Minor features (logging):
18844 - Provide a more useful warning message when configured with an
18845 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
18846 - When dumping unparseable router descriptors, optionally store them
18847 in separate files, named by digest, up to a configurable size
18848 limit. You can change the size limit by setting the
18849 MaxUnparseableDescSizeToLog option, and disable this feature by
18850 setting that option to 0. Closes ticket 18322.
18851 - Add a set of macros to check nonfatal assertions, for internal
18852 use. Migrating more of our checks to these should help us avoid
18853 needless crash bugs. Closes ticket 18613.
18855 o Minor features (performance):
18856 - Change the "optimistic data" extension from "off by default" to
18857 "on by default". The default was ordinarily overridden by a
18858 consensus option, but when clients were bootstrapping for the
18859 first time, they would not have a consensus to get the option
18860 from. Changing this default saves a round-trip during startup.
18861 Closes ticket 18815.
18863 o Minor features (relay, usability):
18864 - When the directory authorities refuse a bad relay's descriptor,
18865 encourage the relay operator to contact us. Many relay operators
18866 won't notice this line in their logs, but it's a win if even a few
18867 learn why we don't like what their relay was doing. Resolves
18870 o Minor features (testing):
18871 - Let backtrace tests work correctly under AddressSanitizer. Fixes
18872 part of bug 18934; bugfix on 0.2.5.2-alpha.
18873 - Move the test-network.sh script to chutney, and modify tor's test-
18874 network.sh to call the (newer) chutney version when available.
18875 Resolves ticket 19116. Patch by teor.
18876 - Use the lcov convention for marking lines as unreachable, so that
18877 we don't count them when we're generating test coverage data.
18878 Update our coverage tools to understand this convention. Closes
18881 o Minor bugfixes (bootstrap):
18882 - Remember the directory we fetched the consensus or previous
18883 certificates from, and use it to fetch future authority
18884 certificates. This change improves bootstrapping performance.
18885 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
18887 o Minor bugfixes (build):
18888 - The test-stem and test-network makefile targets now depend only on
18889 the tor binary that they are testing. Previously, they depended on
18890 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
18891 patch from "cypherpunks".
18893 o Minor bugfixes (circuits):
18894 - Make sure extend_info_from_router() is only called on servers.
18895 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
18897 o Minor bugfixes (compilation):
18898 - When building with Clang, use a full set of GCC warnings.
18899 (Previously, we included only a subset, because of the way we
18900 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
18902 o Minor bugfixes (directory authority):
18903 - Authorities now sort the "package" lines in their votes, for ease
18904 of debugging. (They are already sorted in consensus documents.)
18905 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
18906 - When parsing a detached signature, make sure we use the length of
18907 the digest algorithm instead of an hardcoded DIGEST256_LEN in
18908 order to avoid comparing bytes out-of-bounds with a smaller digest
18909 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
18911 o Minor bugfixes (documentation):
18912 - Document the --passphrase-fd option in the tor manpage. Fixes bug
18913 19504; bugfix on 0.2.7.3-rc.
18914 - Fix the description of the --passphrase-fd option in the
18915 tor-gencert manpage. The option is used to pass the number of a
18916 file descriptor to read the passphrase from, not to read the file
18917 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
18919 o Minor bugfixes (ephemeral hidden service):
18920 - When deleting an ephemeral hidden service, close its intro points
18921 even if they are not completely open. Fixes bug 18604; bugfix
18924 o Minor bugfixes (guard selection):
18925 - Use a single entry guard even if the NumEntryGuards consensus
18926 parameter is not provided. Fixes bug 17688; bugfix
18928 - Don't mark guards as unreachable if connection_connect() fails.
18929 That function fails for local reasons, so it shouldn't reveal
18930 anything about the status of the guard. Fixes bug 14334; bugfix
18933 o Minor bugfixes (hidden service client):
18934 - Increase the minimum number of internal circuits we preemptively
18935 build from 2 to 3, so a circuit is available when a client
18936 connects to another onion service. Fixes bug 13239; bugfix
18939 o Minor bugfixes (logging):
18940 - When logging a directory ownership mismatch, log the owning
18941 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
18943 o Minor bugfixes (memory leaks):
18944 - Fix a small, uncommon memory leak that could occur when reading a
18945 truncated ed25519 key file. Fixes bug 18956; bugfix
18948 o Minor bugfixes (testing):
18949 - Allow clients to retry HSDirs much faster in test networks. Fixes
18950 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
18951 - Disable ASAN's detection of segmentation faults while running
18952 test_bt.sh, so that we can make sure that our own backtrace
18953 generation code works. Fixes another aspect of bug 18934; bugfix
18954 on 0.2.5.2-alpha. Patch from "cypherpunks".
18955 - Fix the test-network-all target on out-of-tree builds by using the
18956 correct path to the test driver script. Fixes bug 19421; bugfix
18959 o Minor bugfixes (time):
18960 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
18961 bugfix on all released tor versions.
18962 - When computing the difference between two times in milliseconds,
18963 we now round to the nearest millisecond correctly. Previously, we
18964 could sometimes round in the wrong direction. Fixes bug 19428;
18965 bugfix on 0.2.2.2-alpha.
18967 o Minor bugfixes (user interface):
18968 - Display a more accurate number of suppressed messages in the log
18969 rate-limiter. Previously, there was a potential integer overflow
18970 in the counter. Now, if the number of messages hits a maximum, the
18971 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
18973 - Fix a typo in the passphrase prompt for the ed25519 identity key.
18974 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
18976 o Code simplification and refactoring:
18977 - Remove redundant declarations of the MIN macro. Closes
18979 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
18980 Closes ticket 18462; patch from "icanhasaccount".
18981 - Split the 600-line directory_handle_command_get function into
18982 separate functions for different URL types. Closes ticket 16698.
18985 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
18986 ticket 19153. Patch from "U+039b".
18988 o Removed features:
18989 - Remove support for "GET /tor/bytes.txt" DirPort request, and
18990 "GETINFO dir-usage" controller request, which were only available
18991 via a compile-time option in Tor anyway. Feature was added in
18992 0.2.2.1-alpha. Resolves ticket 19035.
18993 - There is no longer a compile-time option to disable support for
18994 TransPort. (If you don't want TransPort; just don't use it.) Patch
18995 from "U+039b". Closes ticket 19449.
18998 - Run more workqueue tests as part of "make check". These had
18999 previously been implemented, but you needed to know special
19000 command-line options to enable them.
19001 - We now have unit tests for our code to reject zlib "compression
19002 bombs". (Fortunately, the code works fine.)
19005 Changes in version 0.2.8.6 - 2016-08-02
19007 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
19009 The Tor 0.2.8 series improves client bootstrapping performance,
19010 completes the authority-side implementation of improved identity
19011 keys for relays, and includes numerous bugfixes and performance
19012 improvements throughout the program. This release continues to
19013 improve the coverage of Tor's test suite. For a full list of
19014 changes since Tor 0.2.7, see the ReleaseNotes file.
19016 Changes since 0.2.8.5-rc:
19018 o Minor features (geoip):
19019 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
19022 o Minor bugfixes (compilation):
19023 - Fix a compilation warning in the unit tests on systems where char
19024 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
19026 o Minor bugfixes (fallback directories):
19027 - Remove 1 fallback that was on the hardcoded list, then opted-out,
19028 leaving 89 of the 100 fallbacks originally introduced in Tor
19029 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
19031 o Minor bugfixes (Linux seccomp2 sandbox):
19032 - Allow more syscalls when running with "Sandbox 1" enabled:
19033 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
19034 some systems, these are required for Tor to start. Fixes bug
19035 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
19036 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
19037 so that get_interface_address6_via_udp_socket_hack() can work.
19038 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
19041 Changes in version 0.2.8.5-rc - 2016-07-07
19042 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
19043 series. If we find no new bugs or regressions here, the first stable
19044 0.2.8 release will be identical to it. It has a few small bugfixes
19045 against previous versions.
19047 o Directory authority changes:
19048 - Urras is no longer a directory authority. Closes ticket 19271.
19050 o Major bugfixes (heartbeat):
19051 - Fix a regression that would crash Tor when the periodic
19052 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
19053 0.2.8.1-alpha. Reported by "kubaku".
19055 o Minor features (build):
19056 - Tor now again builds with the recent OpenSSL 1.1 development
19057 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
19058 - When building manual pages, set the timezone to "UTC", so that the
19059 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
19060 Patch from intrigeri.
19062 o Minor bugfixes (fallback directory selection):
19063 - Avoid errors during fallback selection if there are no eligible
19064 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
19067 o Minor bugfixes (IPv6, microdescriptors):
19068 - Don't check node addresses when we only have a routerstatus. This
19069 allows IPv6-only clients to bootstrap by fetching microdescriptors
19070 from fallback directory mirrors. (The microdescriptor consensus
19071 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
19074 o Minor bugfixes (logging):
19075 - Reduce pointlessly verbose log messages when directory servers
19076 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
19077 0.2.8.1-alpha. Patch by teor.
19078 - When a fallback directory changes its fingerprint from the hard-
19079 coded fingerprint, log a less severe, more explanatory log
19080 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
19082 o Minor bugfixes (Linux seccomp2 sandboxing):
19083 - Allow statistics to be written to disk when "Sandbox 1" is
19084 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
19085 0.2.6.1-alpha respectively.
19087 o Minor bugfixes (user interface):
19088 - Remove a warning message "Service [scrubbed] not found after
19089 descriptor upload". This message appears when one uses HSPOST
19090 control command to upload a service descriptor. Since there is
19091 only a descriptor and no service, showing this message is
19092 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
19094 o Fallback directory list:
19095 - Add a comment to the generated fallback directory list that
19096 explains how to comment out unsuitable fallbacks in a way that's
19097 compatible with the stem fallback parser.
19098 - Update fallback whitelist and blacklist based on relay operator
19099 emails. Blacklist unsuitable (non-working, over-volatile)
19100 fallbacks. Resolves ticket 19071. Patch by teor.
19101 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
19102 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
19103 ticket 19071; patch by teor.
19106 Changes in version 0.2.8.4-rc - 2016-06-15
19107 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
19108 If we find no new bugs or regressions here, the first stable 0.2.8
19109 release will be identical to it. It has a few small bugfixes against
19112 o Major bugfixes (user interface):
19113 - Correctly give a warning in the cases where a relay is specified
19114 by nickname, and one such relay is found, but it is not officially
19115 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
19117 o Minor features (build):
19118 - Tor now builds once again with the recent OpenSSL 1.1 development
19119 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
19121 o Minor features (geoip):
19122 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
19125 o Minor bugfixes (compilation):
19126 - Cause the unit tests to compile correctly on mingw64 versions that
19127 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
19129 o Minor bugfixes (downloading):
19130 - Predict more correctly whether we'll be downloading over HTTP when
19131 we determine the maximum length of a URL. This should avoid a
19132 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
19136 Changes in version 0.2.8.3-alpha - 2016-05-26
19137 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
19138 the course of the 0.2.8 development cycle. It improves the behavior of
19139 directory clients, fixes several crash bugs, fixes a gap in compiler
19140 hardening, and allows the full integration test suite to run on
19143 o Major bugfixes (security, client, DNS proxy):
19144 - Stop a crash that could occur when a client running with DNSPort
19145 received a query with multiple address types, and the first
19146 address type was not supported. Found and fixed by Scott Dial.
19147 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
19149 o Major bugfixes (security, compilation):
19150 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
19151 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
19152 cause a compiler warning, thereby making other checks fail, and
19153 needlessly disabling compiler-hardening support. Fixes one case of
19154 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
19156 o Major bugfixes (security, directory authorities):
19157 - Fix a crash and out-of-bounds write during authority voting, when
19158 the list of relays includes duplicate ed25519 identity keys. Fixes
19159 bug 19032; bugfix on 0.2.8.2-alpha.
19161 o Major bugfixes (client, bootstrapping):
19162 - Check if bootstrap consensus downloads are still needed when the
19163 linked connection attaches. This prevents tor making unnecessary
19164 begindir-style connections, which are the only directory
19165 connections tor clients make since the fix for 18483 was merged.
19166 - Fix some edge cases where consensus download connections may not
19167 have been closed, even though they were not needed. Related to fix
19169 - Make relays retry consensus downloads the correct number of times,
19170 rather than the more aggressive client retry count. Fixes part of
19172 - Stop downloading consensuses when we have a consensus, even if we
19173 don't have all the certificates for it yet. Fixes bug 18809;
19174 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
19176 o Major bugfixes (directory mirrors):
19177 - Decide whether to advertise begindir support in the the same way
19178 we decide whether to advertise our DirPort. Allowing these
19179 decisions to become out-of-sync led to surprising behavior like
19180 advertising begindir support when hibernation made us not
19181 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
19184 o Major bugfixes (IPv6 bridges, client):
19185 - Actually use IPv6 addresses when selecting directory addresses for
19186 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
19189 o Major bugfixes (key management):
19190 - If OpenSSL fails to generate an RSA key, do not retain a dangling
19191 pointer to the previous (uninitialized) key value. The impact here
19192 should be limited to a difficult-to-trigger crash, if OpenSSL is
19193 running an engine that makes key generation failures possible, or
19194 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
19195 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
19198 o Major bugfixes (testing):
19199 - Fix a bug that would block 'make test-network-all' on systems where
19200 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
19201 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
19202 bugfix on 0.2.8.1-alpha.
19204 o Minor features (clients):
19205 - Make clients, onion services, and bridge relays always use an
19206 encrypted begindir connection for directory requests. Resolves
19207 ticket 18483. Patch by "teor".
19209 o Minor features (fallback directory mirrors):
19210 - Give each fallback the same weight for client selection; restrict
19211 fallbacks to one per operator; report fallback directory detail
19212 changes when rebuilding list; add new fallback directory mirrors
19213 to the whitelist; and many other minor simplifications and fixes.
19214 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
19215 0.2.8.1-alpha; patch by "teor".
19216 - Replace the 21 fallbacks generated in January 2016 and included in
19217 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
19218 2016. Closes task 17158; patch by "teor".
19220 o Minor features (geoip):
19221 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
19224 o Minor bugfixes (assert, portability):
19225 - Fix an assertion failure in memarea.c on systems where "long" is
19226 shorter than the size of a pointer. Fixes bug 18716; bugfix
19229 o Minor bugfixes (bootstrap):
19230 - Consistently use the consensus download schedule for authority
19231 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
19233 o Minor bugfixes (build):
19234 - Remove a pair of redundant AM_CONDITIONAL declarations from
19235 configure.ac. Fixes one final case of bug 17744; bugfix
19237 - Resolve warnings when building on systems that are concerned with
19238 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
19240 - When libscrypt.h is found, but no libscrypt library can be linked,
19241 treat libscrypt as absent. Fixes bug 19161; bugfix
19244 o Minor bugfixes (client):
19245 - Turn all TestingClientBootstrap* into non-testing torrc options.
19246 This changes simply renames them by removing "Testing" in front of
19247 them and they do not require TestingTorNetwork to be enabled
19248 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
19249 - Make directory node selection more reliable, mainly for IPv6-only
19250 clients and clients with few reachable addresses. Fixes bug 18929;
19251 bugfix on 0.2.8.1-alpha. Patch by "teor".
19253 o Minor bugfixes (controller, microdescriptors):
19254 - Make GETINFO dir/status-vote/current/consensus conform to the
19255 control specification by returning "551 Could not open cached
19256 consensus..." when not caching consensuses. Fixes bug 18920;
19257 bugfix on 0.2.2.6-alpha.
19259 o Minor bugfixes (crypto, portability):
19260 - The SHA3 and SHAKE routines now produce the correct output on Big
19261 Endian systems. No code calls either algorithm yet, so this is
19262 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
19263 - Tor now builds again with the recent OpenSSL 1.1 development
19264 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
19267 o Minor bugfixes (directories):
19268 - When fetching extrainfo documents, compare their SHA256 digests
19269 and Ed25519 signing key certificates with the routerinfo that led
19270 us to fetch them, rather than with the most recent routerinfo.
19271 Otherwise we generate many spurious warnings about mismatches.
19272 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
19274 o Minor bugfixes (logging):
19275 - When we can't generate a signing key because OfflineMasterKey is
19276 set, do not imply that we should have been able to load it. Fixes
19277 bug 18133; bugfix on 0.2.7.2-alpha.
19278 - Stop periodic_event_dispatch() from blasting twelve lines per
19279 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
19280 - When rejecting a misformed INTRODUCE2 cell, only log at
19281 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
19283 o Minor bugfixes (pluggable transports):
19284 - Avoid reporting a spurious error when we decide that we don't need
19285 to terminate a pluggable transport because it has already exited.
19286 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
19288 o Minor bugfixes (pointer arithmetic):
19289 - Fix a bug in memarea_alloc() that could have resulted in remote
19290 heap write access, if Tor had ever passed an unchecked size to
19291 memarea_alloc(). Fortunately, all the sizes we pass to
19292 memarea_alloc() are pre-checked to be less than 128 kilobytes.
19293 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
19296 o Minor bugfixes (relays):
19297 - Consider more config options when relays decide whether to
19298 regenerate their descriptor. Fixes more of bug 12538; bugfix
19300 - Resolve some edge cases where we might launch an ORPort
19301 reachability check even when DisableNetwork is set. Noticed while
19302 fixing bug 18616; bugfix on 0.2.3.9-alpha.
19304 o Minor bugfixes (statistics):
19305 - We now include consensus downloads via IPv6 in our directory-
19306 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
19308 o Minor bugfixes (testing):
19309 - Allow directories in small networks to bootstrap by skipping
19310 DirPort checks when the consensus has no exits. Fixes bug 19003;
19311 bugfix on 0.2.8.1-alpha. Patch by teor.
19312 - Fix a small memory leak that would occur when the
19313 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
19314 bugfix on 0.2.5.2-alpha.
19316 o Minor bugfixes (time handling):
19317 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
19318 field. Otherwise, our unit tests crash on Windows. Fixes bug
19319 18977; bugfix on 0.2.2.25-alpha.
19322 - Document the contents of the 'datadir/keys' subdirectory in the
19323 manual page. Closes ticket 17621.
19324 - Stop recommending use of nicknames to identify relays in our
19325 MapAddress documentation. Closes ticket 18312.
19328 Changes in version 0.2.8.2-alpha - 2016-03-28
19329 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
19330 bugs in earlier versions of Tor, including some that prevented
19331 authorities using Tor 0.2.7.x from running correctly. IPv6 and
19332 directory support should also be much improved.
19334 o New system requirements:
19335 - Tor no longer supports versions of OpenSSL with a broken
19336 implementation of counter mode. (This bug was present in OpenSSL
19337 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
19338 longer runs with, these versions.
19339 - Tor no longer attempts to support platforms where the "time_t"
19340 type is unsigned. (To the best of our knowledge, only OpenVMS does
19341 this, and Tor has never actually built on OpenVMS.) Closes
19343 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
19344 later (released in 2008 and 2009 respectively). If you are
19345 building Tor from the git repository instead of from the source
19346 distribution, and your tools are older than this, you will need to
19347 upgrade. Closes ticket 17732.
19349 o Major bugfixes (security, pointers):
19350 - Avoid a difficult-to-trigger heap corruption attack when extending
19351 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
19352 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
19353 Reported by Guido Vranken.
19355 o Major bugfixes (bridges, pluggable transports):
19356 - Modify the check for OR connections to private addresses. Allow
19357 bridges on private addresses, including pluggable transports that
19358 ignore the (potentially private) address in the bridge line. Fixes
19359 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
19361 o Major bugfixes (compilation):
19362 - Repair hardened builds under the clang compiler. Previously, our
19363 use of _FORTIFY_SOURCE would conflict with clang's address
19364 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
19366 o Major bugfixes (crash on shutdown):
19367 - Correctly handle detaching circuits from muxes when shutting down.
19368 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
19369 - Fix an assert-on-exit bug related to counting memory usage in
19370 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
19372 o Major bugfixes (crash on startup):
19373 - Fix a segfault during startup: If a Unix domain socket was
19374 configured as listener (such as a ControlSocket or a SocksPort
19375 "unix:" socket), and tor was started as root but not configured to
19376 switch to another user, tor would segfault while trying to string
19377 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
19380 o Major bugfixes (dns proxy mode, crash):
19381 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
19382 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
19384 o Major bugfixes (relays, bridge clients):
19385 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
19386 bridge clients use the address configured in the bridge line.
19387 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
19390 o Major bugfixes (voting):
19391 - Actually enable support for authorities to match routers by their
19392 Ed25519 identities. Previously, the code had been written, but
19393 some debugging code that had accidentally been left in the
19394 codebase made it stay turned off. Fixes bug 17702; bugfix
19396 - When collating votes by Ed25519 identities, authorities now
19397 include a "NoEdConsensus" flag if the ed25519 value (or lack
19398 thereof) for a server does not reflect the majority consensus.
19399 Related to bug 17668; bugfix on 0.2.7.2-alpha.
19400 - When generating a vote with keypinning disabled, never include two
19401 entries for the same ed25519 identity. This bug was causing
19402 authorities to generate votes that they could not parse when a
19403 router violated key pinning by changing its RSA identity but
19404 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
19405 18318. Bugfix on 0.2.7.2-alpha.
19407 o Minor features (security, win32):
19408 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
19409 attack. Fixes bug 18123; bugfix on all tor versions. Patch
19412 o Minor features (bug-resistance):
19413 - Make Tor survive errors involving connections without a
19414 corresponding event object. Previously we'd fail with an
19415 assertion; now we produce a log message. Related to bug 16248.
19417 o Minor features (build):
19418 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
19419 as having possible IPFW support. Closes ticket 18448. Patch from
19420 Steven Chamberlain.
19422 o Minor features (code hardening):
19423 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
19424 level code, to harden against accidental failures to NUL-
19425 terminate. Part of ticket 17852. Patch from jsturgix. Found
19428 o Minor features (crypto):
19429 - Validate the hard-coded Diffie-Hellman parameters and ensure that
19430 p is a safe prime, and g is a suitable generator. Closes
19433 o Minor features (geoip):
19434 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
19437 o Minor features (hidden service directory):
19438 - Streamline relay-side hsdir handling: when relays consider whether
19439 to accept an uploaded hidden service descriptor, they no longer
19440 check whether they are one of the relays in the network that is
19441 "supposed" to handle that descriptor. Implements ticket 18332.
19443 o Minor features (IPv6):
19444 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
19445 to 1, tor prefers IPv6 directory addresses.
19446 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
19447 avoids using IPv4 for client OR and directory connections.
19448 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
19449 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
19450 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
19452 o Minor features (linux seccomp2 sandbox):
19453 - Reject attempts to change our Address with "Sandbox 1" enabled.
19454 Changing Address with Sandbox turned on would never actually work,
19455 but previously it would fail in strange and confusing ways. Found
19456 while fixing 18548.
19458 o Minor features (robustness):
19459 - Exit immediately with an error message if the code attempts to use
19460 Libevent without having initialized it. This should resolve some
19461 frequently-made mistakes in our unit tests. Closes ticket 18241.
19463 o Minor features (unix domain sockets):
19464 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
19465 Unix domain sockets without checking the permissions on the parent
19466 directory. (Tor checks permissions by default because some
19467 operating systems only check permissions on the parent directory.
19468 However, some operating systems do look at permissions on the
19469 socket, and tor's default check is unneeded.) Closes ticket 18458.
19472 o Minor bugfixes (exit policies, security):
19473 - Refresh an exit relay's exit policy when interface addresses
19474 change. Previously, tor only refreshed the exit policy when the
19475 configured external address changed. Fixes bug 18208; bugfix on
19476 0.2.7.3-rc. Patch by teor.
19478 o Minor bugfixes (security, hidden services):
19479 - Prevent hidden services connecting to client-supplied rendezvous
19480 addresses that are reserved as internal or multicast. Fixes bug
19481 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
19483 o Minor bugfixes (build):
19484 - Do not link the unit tests against both the testing and non-
19485 testing versions of the static libraries. Fixes bug 18490; bugfix
19487 - Avoid spurious failures from configure files related to calling
19488 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
19489 0.2.0.1-alpha. Patch from "cypherpunks".
19490 - Silence spurious clang-scan warnings in the ed25519_donna code by
19491 explicitly initializing some objects. Fixes bug 18384; bugfix on
19492 0.2.7.2-alpha. Patch by teor.
19494 o Minor bugfixes (client, bootstrap):
19495 - Count receipt of new microdescriptors as progress towards
19496 bootstrapping. Previously, with EntryNodes set, Tor might not
19497 successfully repopulate the guard set on bootstrapping. Fixes bug
19498 16825; bugfix on 0.2.3.1-alpha.
19500 o Minor bugfixes (code correctness):
19501 - Update to the latest version of Trunnel, which tries harder to
19502 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
19503 by clang address sanitizer. Fixes bug 18373; bugfix
19506 o Minor bugfixes (configuration):
19507 - Fix a tiny memory leak when parsing a port configuration ending in
19508 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
19510 o Minor bugfixes (containers):
19511 - If we somehow attempt to construct a heap with more than
19512 1073741822 elements, avoid an integer overflow when maintaining
19513 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
19515 o Minor bugfixes (correctness):
19516 - Fix a bad memory handling bug that would occur if we had queued a
19517 cell on a channel's incoming queue. Fortunately, we can't actually
19518 queue a cell like that as our code is constructed today, but it's
19519 best to avoid this kind of error, even if there isn't any code
19520 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
19522 o Minor bugfixes (directory):
19523 - When generating a URL for a directory server on an IPv6 address,
19524 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
19525 on 0.2.3.9-alpha. Patch from Malek.
19527 o Minor bugfixes (fallback directory mirrors):
19528 - When requesting extrainfo descriptors from a trusted directory
19529 server, check whether it is an authority or a fallback directory
19530 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
19531 0.2.4.7-alpha. Reported by atagar, patch by teor.
19533 o Minor bugfixes (hidden service, client):
19534 - Handle the case where the user makes several fast consecutive
19535 requests to the same .onion address. Previously, the first six
19536 requests would each trigger a descriptor fetch, each picking a
19537 directory (there are 6 overall) and the seventh one would fail
19538 because no directories were left, thereby triggering a close on
19539 all current directory connections asking for the hidden service.
19540 The solution here is to not close the connections if we have
19541 pending directory fetches. Fixes bug 15937; bugfix
19544 o Minor bugfixes (hidden service, control port):
19545 - Add the onion address to the HS_DESC event for the UPLOADED action
19546 both on success or failure. It was previously hardcoded with
19547 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
19549 o Minor bugfixes (hidden service, directory):
19550 - Bridges now refuse "rendezvous2" (hidden service descriptor)
19551 publish attempts. Suggested by ticket 18332.
19553 o Minor bugfixes (linux seccomp2 sandbox):
19554 - Allow the setrlimit syscall, and the prlimit and prlimit64
19555 syscalls, which some libc implementations use under the hood.
19556 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
19557 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
19558 enabled and no DNS resolvers configured. This should help TAILS
19559 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
19560 - Fix the sandbox's interoperability with unix domain sockets under
19561 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
19563 o Minor bugfixes (logging):
19564 - When logging information about an unparsable networkstatus vote or
19565 consensus, do not say "vote" when we mean consensus. Fixes bug
19566 18368; bugfix on 0.2.0.8-alpha.
19567 - Scrub service name in "unrecognized service ID" log messages.
19568 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
19569 - Downgrade logs and backtraces about IP versions to info-level.
19570 Only log backtraces once each time tor runs. Assists in diagnosing
19571 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
19572 Christian, patch by teor.
19574 o Minor bugfixes (memory safety):
19575 - Avoid freeing an uninitialized pointer when opening a socket fails
19576 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
19577 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
19579 - Correctly duplicate addresses in get_interface_address6_list().
19580 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
19581 patch by "cypherpunks".
19582 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
19584 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
19585 18672; bugfix on 0.2.5.1-alpha.
19587 o Minor bugfixes (private directory):
19588 - Prevent a race condition when creating private directories. Fixes
19589 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
19590 Patch from jsturgix. Found with Flawfinder.
19592 o Minor bugfixes (test networks, IPv6):
19593 - Allow internal IPv6 addresses in descriptors in test networks.
19594 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
19597 o Minor bugfixes (testing):
19598 - We no longer disable assertions in the unit tests when coverage is
19599 enabled. Instead, we require you to say --disable-asserts-in-tests
19600 to the configure script if you need assertions disabled in the
19601 unit tests (for example, if you want to perform branch coverage).
19602 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
19604 o Minor bugfixes (time parsing):
19605 - Avoid overflow in tor_timegm when parsing dates in and after 2038
19606 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
19607 0.0.2pre14. Patch by teor.
19609 o Minor bugfixes (tor-gencert):
19610 - Correctly handle the case where an authority operator enters a
19611 passphrase but sends an EOF before sending a newline. Fixes bug
19612 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
19614 o Code simplification and refactoring:
19615 - Quote all the string interpolations in configure.ac -- even those
19616 which we are pretty sure can't contain spaces. Closes ticket
19617 17744. Patch from zerosion.
19618 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
19619 inplace, so there's no need to have a separate implementation for
19620 the non-inplace code. Closes ticket 18258. Patch from Malek.
19621 - Simplify return types for some crypto functions that can't
19622 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
19625 - Change build messages to refer to "Fedora" instead of "Fedora
19626 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
19627 Patches from "icanhasaccount" and "cypherpunks".
19629 o Removed features:
19630 - We no longer maintain an internal freelist in memarea.c.
19631 Allocators should be good enough to make this code unnecessary,
19632 and it's doubtful that it ever had any performance benefit.
19635 - Fix several warnings from clang's address sanitizer produced in
19637 - Treat backtrace test failures as expected on FreeBSD until we
19638 solve bug 17808. Closes ticket 18204.
19641 Changes in version 0.2.8.1-alpha - 2016-02-04
19642 Tor 0.2.8.1-alpha is the first alpha release in its series. It
19643 includes numerous small features and bugfixes against previous Tor
19644 versions, and numerous small infrastructure improvements. The most
19645 notable features are a set of improvements to the directory subsystem.
19647 o Major features (security, Linux):
19648 - When Tor starts as root on Linux and is told to switch user ID, it
19649 can now retain the capability to bind to low ports. By default,
19650 Tor will do this only when it's switching user ID and some low
19651 ports have been configured. You can change this behavior with the
19652 new option KeepBindCapabilities. Closes ticket 8195.
19654 o Major features (directory system):
19655 - When bootstrapping multiple consensus downloads at a time, use the
19656 first one that starts downloading, and close the rest. This
19657 reduces failures when authorities or fallback directories are slow
19658 or down. Together with the code for feature 15775, this feature
19659 should reduces failures due to fallback churn. Implements ticket
19660 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
19661 "mikeperry" and "teor".
19662 - Include a trial list of 21 default fallback directories, generated
19663 in January 2016, based on an opt-in survey of suitable relays.
19664 Doing this should make clients bootstrap more quickly and reliably,
19665 and reduce the load on the directory authorities. Closes ticket
19666 15775. Patch by "teor".
19667 Candidates identified using an OnionOO script by "weasel", "teor",
19668 "gsathya", and "karsten".
19669 - Previously only relays that explicitly opened a directory port
19670 (DirPort) accepted directory requests from clients. Now all
19671 relays, with and without a DirPort, accept and serve tunneled
19672 directory requests that they receive through their ORPort. You can
19673 disable this behavior using the new DirCache option. Closes
19676 o Major key updates:
19677 - Update the V3 identity key for the dannenberg directory authority:
19678 it was changed on 18 November 2015. Closes task 17906. Patch
19681 o Minor features (security, clock):
19682 - Warn when the system clock appears to move back in time (when the
19683 state file was last written in the future). Tor doesn't know that
19684 consensuses have expired if the clock is in the past. Patch by
19685 "teor". Implements ticket 17188.
19687 o Minor features (security, exit policies):
19688 - ExitPolicyRejectPrivate now rejects more private addresses by
19689 default. Specifically, it now rejects the relay's outbound bind
19690 addresses (if configured), and the relay's configured port
19691 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
19692 0.2.0.11-alpha. Patch by "teor".
19694 o Minor features (security, memory erasure):
19695 - Set the unused entries in a smartlist to NULL. This helped catch
19696 a (harmless) bug, and shouldn't affect performance too much.
19697 Implements ticket 17026.
19698 - Use SecureMemoryWipe() function to securely clean memory on
19699 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
19700 Implements feature 17986.
19701 - Use explicit_bzero or memset_s when present. Previously, we'd use
19702 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
19703 from <logan@hackers.mu> and <selven@hackers.mu>.
19704 - Make memwipe() do nothing when passed a NULL pointer or buffer of
19705 zero size. Check size argument to memwipe() for underflow. Fixes
19706 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
19709 o Minor features (security, RNG):
19710 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
19711 positively are not allowed to fail. Previously we depended on
19712 internal details of OpenSSL's behavior. Closes ticket 17686.
19713 - Never use the system entropy output directly for anything besides
19714 seeding the PRNG. When we want to generate important keys, instead
19715 of using system entropy directly, we now hash it with the PRNG
19716 stream. This may help resist certain attacks based on broken OS
19717 entropy implementations. Closes part of ticket 17694.
19718 - Use modern system calls (like getentropy() or getrandom()) to
19719 generate strong entropy on platforms that have them. Closes
19722 o Minor features (accounting):
19723 - Added two modes to the AccountingRule option: One for limiting
19724 only the number of bytes sent ("AccountingRule out"), and one for
19725 limiting only the number of bytes received ("AccountingRule in").
19726 Closes ticket 15989; patch from "unixninja92".
19728 o Minor features (build):
19729 - Since our build process now uses "make distcheck", we no longer
19730 force "make dist" to depend on "make check". Closes ticket 17893;
19731 patch from "cypherpunks."
19732 - Tor now builds successfully with the recent OpenSSL 1.1
19733 development branch, and with the latest LibreSSL. Closes tickets
19734 17549, 17921, and 17984.
19736 o Minor features (controller):
19737 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
19738 tickets 16774 and 17817. Patch by George Tankersley.
19739 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
19740 service descriptor from a service's local hidden service
19741 descriptor cache. Closes ticket 14846.
19742 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
19743 controllers can examine the the reject rules added by
19744 ExitPolicyRejectPrivate. This makes it easier for stem to display
19747 o Minor features (crypto):
19748 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
19750 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
19751 - When allocating a digest state object, allocate no more space than
19752 we actually need. Previously, we would allocate as much space as
19753 the state for the largest algorithm would need. This change saves
19754 up to 672 bytes per circuit. Closes ticket 17796.
19755 - Improve performance when hashing non-multiple of 8 sized buffers,
19756 based on Andrew Moon's public domain SipHash-2-4 implementation.
19757 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
19759 o Minor features (directory downloads):
19760 - Wait for busy authorities and fallback directories to become non-
19761 busy when bootstrapping. (A similar change was made in 6c443e987d
19762 for directory caches chosen from the consensus.) Closes ticket
19763 17864; patch by "teor".
19764 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
19765 directory mirrors. The default is 1; set it to 0 to disable
19766 fallbacks. Implements ticket 17576. Patch by "teor".
19768 o Minor features (geoip):
19769 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
19772 o Minor features (IPv6):
19773 - Add an argument 'ipv6=address:orport' to the DirAuthority and
19774 FallbackDir torrc options, to specify an IPv6 address for an
19775 authority or fallback directory. Add hard-coded ipv6 addresses for
19776 directory authorities that have them. Closes ticket 17327; patch
19777 from Nick Mathewson and "teor".
19778 - Add address policy assume_action support for IPv6 addresses.
19779 - Limit IPv6 mask bits to 128.
19780 - Warn when comparing against an AF_UNSPEC address in a policy, it's
19781 almost always a bug. Closes ticket 17863; patch by "teor".
19782 - Allow users to configure directory authorities and fallback
19783 directory servers with IPv6 addresses and ORPorts. Resolves
19785 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
19786 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
19787 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
19788 17638; bugfix on 0.0.2pre8. Patch by "teor".
19790 o Minor features (logging):
19791 - When logging to syslog, allow a tag to be added to the syslog
19792 identity (the string prepended to every log message). The tag can
19793 be configured with SyslogIdentityTag and defaults to none. Setting
19794 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
19797 o Minor features (portability):
19798 - Use timingsafe_memcmp() where available. Closes ticket 17944;
19799 patch from <logan@hackers.mu>.
19801 o Minor features (relay, address discovery):
19802 - Add a family argument to get_interface_addresses_raw() and
19803 subfunctions to make network interface address interogation more
19804 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
19805 types of interfaces from the operating system. Resolves
19807 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
19808 fails to enumerate interface addresses using the platform-specific
19809 API, have it rely on the UDP socket fallback technique to try and
19810 find out what IP addresses (both IPv4 and IPv6) our machine has.
19811 Resolves ticket 17951.
19813 o Minor features (replay cache):
19814 - The replay cache now uses SHA256 instead of SHA1. Implements
19815 feature 8961. Patch by "teor", issue reported by "rransom".
19817 o Minor features (unix file permissions):
19818 - Defer creation of Unix sockets until after setuid. This avoids
19819 needing CAP_CHOWN and CAP_FOWNER when using systemd's
19820 CapabilityBoundingSet, or chown and fowner when using SELinux.
19821 Implements part of ticket 17562. Patch from Jamie Nguyen.
19822 - If any directory created by Tor is marked as group readable, the
19823 filesystem group is allowed to be either the default GID or the
19824 root user. Allowing root to read the DataDirectory prevents the
19825 need for CAP_READ_SEARCH when using systemd's
19826 CapabilityBoundingSet, or dac_read_search when using SELinux.
19827 Implements part of ticket 17562. Patch from Jamie Nguyen.
19828 - Introduce a new DataDirectoryGroupReadable option. If it is set to
19829 1, the DataDirectory will be made readable by the default GID.
19830 Implements part of ticket 17562. Patch from Jamie Nguyen.
19832 o Minor bugfixes (accounting):
19833 - The max bandwidth when using 'AccountRule sum' is now correctly
19834 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
19835 from "unixninja92".
19837 o Minor bugfixes (code correctness):
19838 - When closing an entry connection, generate a warning if we should
19839 have sent an end cell for it but we haven't. Fixes bug 17876;
19840 bugfix on 0.2.3.2-alpha.
19841 - Assert that allocated memory held by the reputation code is freed
19842 according to its internal counters. Fixes bug 17753; bugfix
19844 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
19847 o Minor bugfixes (compilation):
19848 - Mark all object files that include micro-revision.i as depending
19849 on it, so as to make parallel builds more reliable. Fixes bug
19850 17826; bugfix on 0.2.5.1-alpha.
19851 - Don't try to use the pthread_condattr_setclock() function unless
19852 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
19853 17819; bugfix on 0.2.6.3-alpha.
19854 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
19856 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19857 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19858 - Fix search for libevent libraries on OpenBSD (and other systems
19859 that install libevent 1 and libevent 2 in parallel). Fixes bug
19860 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
19861 - Isolate environment variables meant for tests from the rest of the
19862 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
19863 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
19865 - Remove config.log only from make distclean, not from make clean.
19866 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
19868 o Minor bugfixes (crypto):
19869 - Check the return value of HMAC() and assert on failure. Fixes bug
19870 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
19872 o Minor bugfixes (fallback directories):
19873 - Mark fallbacks as "too busy" when they return a 503 response,
19874 rather than just marking authorities. Fixes bug 17572; bugfix on
19875 0.2.4.7-alpha. Patch by "teor".
19877 o Minor bugfixes (IPv6):
19878 - Update the limits in max_dl_per_request for IPv6 address length.
19879 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
19881 o Minor bugfixes (linux seccomp2 sandbox):
19882 - Fix a crash when using offline master ed25519 keys with the Linux
19883 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
19885 o Minor bugfixes (logging):
19886 - In log messages that include a function name, use __FUNCTION__
19887 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
19888 with clang __PRETTY_FUNCTION__ has extra information we don't
19889 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
19891 - Remove needless quotes from a log message about unparseable
19892 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
19894 o Minor bugfixes (portability):
19895 - Remove an #endif from configure.ac so that we correctly detect the
19896 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
19899 o Minor bugfixes (relays):
19900 - Check that both the ORPort and DirPort (if present) are reachable
19901 before publishing a relay descriptor. Otherwise, relays publish a
19902 descriptor with DirPort 0 when the DirPort reachability test takes
19903 longer than the ORPort reachability test. Fixes bug 18050; bugfix
19904 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
19906 o Minor bugfixes (relays, hidden services):
19907 - Refuse connection requests to private OR addresses unless
19908 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
19909 then refuse to send any cells to a private address. Fixes bugs
19910 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
19912 o Minor bugfixes (safe logging):
19913 - When logging a malformed hostname received through socks4, scrub
19914 it if SafeLogging says we should. Fixes bug 17419; bugfix
19917 o Minor bugfixes (statistics code):
19918 - Consistently check for overflow in round_*_to_next_multiple_of
19919 functions, and add unit tests with additional and maximal values.
19920 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
19921 - Handle edge cases in the laplace functions: avoid division by
19922 zero, avoid taking the log of zero, and silence clang type
19923 conversion warnings using round and trunc. Add unit tests for edge
19924 cases with maximal values. Fixes part of bug 13192; bugfix
19927 o Minor bugfixes (testing):
19928 - The test for log_heartbeat was incorrectly failing in timezones
19929 with non-integer offsets. Instead of comparing the end of the time
19930 string against a constant, compare it to the output of
19931 format_local_iso_time when given the correct input. Fixes bug
19932 18039; bugfix on 0.2.5.4-alpha.
19933 - Make unit tests pass on IPv6-only systems, and systems without
19934 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
19935 bugfix on 0.2.7.3-rc. Patch by "teor".
19936 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
19938 - Check the full results of SHA256 and SHA512 digests in the unit
19939 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
19941 o Code simplification and refactoring:
19942 - Move logging of redundant policy entries in
19943 policies_parse_exit_policy_internal into its own function. Closes
19944 ticket 17608; patch from "juce".
19945 - Extract the more complicated parts of circuit_mark_for_close()
19946 into a new function that we run periodically before circuits are
19947 freed. This change removes more than half of the functions
19948 currently in the "blob". Closes ticket 17218.
19949 - Clean up a little duplicated code in
19950 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
19952 - Decouple the list of streams waiting to be attached to circuits
19953 from the overall connection list. This change makes it possible to
19954 attach streams quickly while simplifying Tor's callgraph and
19955 avoiding O(N) scans of the entire connection list. Closes
19957 - When a direct directory request fails immediately on launch,
19958 instead of relaunching that request from inside the code that
19959 launches it, instead mark the connection for teardown. This change
19960 simplifies Tor's callback and prevents the directory-request
19961 launching code from invoking itself recursively. Closes
19963 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
19964 use them. Closes ticket 17926.
19967 - Add a description of the correct use of the '--keygen' command-
19968 line option. Closes ticket 17583; based on text by 's7r'.
19969 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
19970 - Explain actual minima for BandwidthRate. Closes ticket 16382.
19971 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
19972 - Mention torspec URL in the manpage and point the reader to it
19973 whenever we mention a document that belongs in torspce. Fixes
19976 o Removed features:
19977 - Remove client-side support for connecting to Tor relays running
19978 versions of Tor before 0.2.3.6-alpha. These relays didn't support
19979 the v3 TLS handshake protocol, and are no longer allowed on the
19980 Tor network. Implements the client side of ticket 11150. Based on
19981 patches by Tom van der Woerdt.
19984 - Add unit tests to check for common RNG failure modes, such as
19985 returning all zeroes, identical values, or incrementing values
19986 (OpenSSL's rand_predictable feature). Patch by "teor".
19987 - Log more information when the backtrace tests fail. Closes ticket
19988 17892. Patch from "cypherpunks."
19989 - Always test both ed25519 backends, so that we can be sure that our
19990 batch-open replacement code works. Part of ticket 16794.
19991 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
19992 portion of ticket 16831.
19993 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
19994 util_format.c, directory.c, and options_validate.c. Closes tickets
19995 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
19997 - Unit tests for directory_handle_command_get. Closes ticket 17004.
19998 Patch from Reinaldo de Souza Jr.
20001 Changes in version 0.2.7.6 - 2015-12-10
20002 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
20003 well as a minor bug in hidden service reliability.
20005 o Major bugfixes (guard selection):
20006 - Actually look at the Guard flag when selecting a new directory
20007 guard. When we implemented the directory guard design, we
20008 accidentally started treating all relays as if they have the Guard
20009 flag during guard selection, leading to weaker anonymity and worse
20010 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
20013 o Minor features (geoip):
20014 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
20017 o Minor bugfixes (compilation):
20018 - When checking for net/pfvar.h, include netinet/in.h if possible.
20019 This fixes transparent proxy detection on OpenBSD. Fixes bug
20020 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
20021 - Fix a compilation warning with Clang 3.6: Do not check the
20022 presence of an address which can never be NULL. Fixes bug 17781.
20024 o Minor bugfixes (correctness):
20025 - When displaying an IPv6 exit policy, include the mask bits
20026 correctly even when the number is greater than 31. Fixes bug
20027 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
20028 - The wrong list was used when looking up expired intro points in a
20029 rend service object, causing what we think could be reachability
20030 issues for hidden services, and triggering a BUG log. Fixes bug
20031 16702; bugfix on 0.2.7.2-alpha.
20032 - Fix undefined behavior in the tor_cert_checksig function. Fixes
20033 bug 17722; bugfix on 0.2.7.2-alpha.
20036 Changes in version 0.2.7.5 - 2015-11-20
20037 The Tor 0.2.7 release series is dedicated to the memory of Tor user
20038 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
20039 tirelessly to advocate human rights regardless of national borders,
20040 and oppose the encroachments of mass surveillance. He opposed national
20041 exceptionalism, he brought clarity to legal and policy debates, he
20042 understood and predicted the impact of mass surveillance on the world,
20043 and he laid the groundwork for resisting it. While serving on the Tor
20044 Project's board of directors, he brought us his uncompromising focus
20045 on technical excellence in the service of humankind. Caspar was an
20046 inimitable force for good and a wonderful friend. He was kind,
20047 humorous, generous, gallant, and believed we should protect one
20048 another without exception. We honor him here for his ideals, his
20049 efforts, and his accomplishments. Please honor his memory with works
20050 that would make him proud.
20052 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
20054 The 0.2.7 series adds a more secure identity key type for relays,
20055 improves cryptography performance, resolves several longstanding
20056 hidden-service performance issues, improves controller support for
20057 hidden services, and includes small bugfixes and performance
20058 improvements throughout the program. This release series also includes
20059 more tests than before, and significant simplifications to which parts
20060 of Tor invoke which others.
20062 (This release contains no code changes since 0.2.7.4-rc.)
20065 Changes in version 0.2.7.4-rc - 2015-10-21
20066 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
20067 fixes some important memory leaks, and a scary-looking (but mostly
20068 harmless in practice) invalid-read bug. It also has a few small
20069 bugfixes, notably fixes for compilation and portability on different
20070 platforms. If no further significant bounds are found, the next
20071 release will the the official stable release.
20073 o Major bugfixes (security, correctness):
20074 - Fix an error that could cause us to read 4 bytes before the
20075 beginning of an openssl string. This bug could be used to cause
20076 Tor to crash on systems with unusual malloc implementations, or
20077 systems with unusual hardening installed. Fixes bug 17404; bugfix
20080 o Major bugfixes (correctness):
20081 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
20082 bug 17401; bugfix on 0.2.7.3-rc.
20084 o Major bugfixes (memory leaks):
20085 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
20086 17398; bugfix on 0.2.6.1-alpha.
20087 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
20088 17402; bugfix on 0.2.7.3-rc.
20089 - Fix a memory leak when reading an expired signing key from disk.
20090 Fixes bug 17403; bugfix on 0.2.7.2-rc.
20092 o Minor features (geoIP):
20093 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
20096 o Minor bugfixes (compilation):
20097 - Repair compilation with the most recent (unreleased, alpha)
20098 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
20099 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
20100 17251; bugfix on 0.2.7.2-alpha.
20101 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
20102 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
20104 o Minor bugfixes (portability):
20105 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
20106 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
20109 o Minor bugfixes (sandbox):
20110 - Add the "hidserv-stats" filename to our sandbox filter for the
20111 HiddenServiceStatistics option to work properly. Fixes bug 17354;
20112 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
20114 o Minor bugfixes (testing):
20115 - Add unit tests for get_interface_address* failure cases. Fixes bug
20116 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
20117 - Fix breakage when running 'make check' with BSD make. Fixes bug
20118 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
20119 - Make the get_ifaddrs_* unit tests more tolerant of different
20120 network configurations. (Don't assume every test box has an IPv4
20121 address, and don't assume every test box has a non-localhost
20122 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
20123 - Skip backtrace tests when backtrace support is not compiled in.
20124 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
20128 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
20129 - Note that HiddenServicePorts can take a unix domain socket. Closes
20133 Changes in version 0.2.7.3-rc - 2015-09-25
20134 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
20135 contains numerous usability fixes for Ed25519 keys, safeguards against
20136 several misconfiguration problems, significant simplifications to
20137 Tor's callgraph, and numerous bugfixes and small features.
20139 This is the most tested release of Tor to date. The unit tests cover
20140 39.40% of the code, and the integration tests (accessible with "make
20141 test-full-online", requiring stem and chutney and a network
20142 connection) raise the coverage to 64.49%.
20144 o Major features (security, hidden services):
20145 - Hidden services, if using the EntryNodes option, are required to
20146 use more than one EntryNode, in order to avoid a guard discovery
20147 attack. (This would only affect people who had configured hidden
20148 services and manually specified the EntryNodes option with a
20149 single entry-node. The impact was that it would be easy to
20150 remotely identify the guard node used by such a hidden service.
20151 See ticket for more information.) Fixes ticket 14917.
20153 o Major features (Ed25519 keys, keypinning):
20154 - The key-pinning option on directory authorities is now advisory-
20155 only by default. In a future version, or when the AuthDirPinKeys
20156 option is set, pins are enforced again. Disabling key-pinning
20157 seemed like a good idea so that we can survive the fallout of any
20158 usability problems associated with Ed25519 keys. Closes
20161 o Major features (Ed25519 performance):
20162 - Improve the speed of Ed25519 operations and Curve25519 keypair
20163 generation when built targeting 32 bit x86 platforms with SSE2
20164 available. Implements ticket 16535.
20165 - Improve the runtime speed of Ed25519 signature verification by
20166 using Ed25519-donna's batch verification support. Implements
20169 o Major features (performance testing):
20170 - The test-network.sh script now supports performance testing.
20171 Requires corresponding chutney performance testing changes. Patch
20172 by "teor". Closes ticket 14175.
20174 o Major features (relay, Ed25519):
20175 - Significant usability improvements for Ed25519 key management. Log
20176 messages are better, and the code can recover from far more
20177 failure conditions. Thanks to "s7r" for reporting and diagnosing
20179 - Add a new OfflineMasterKey option to tell Tor never to try loading
20180 or generating a secret Ed25519 identity key. You can use this in
20181 combination with tor --keygen to manage offline and/or encrypted
20182 Ed25519 keys. Implements ticket 16944.
20183 - Add a --newpass option to allow changing or removing the
20184 passphrase of an encrypted key with tor --keygen. Implements part
20186 - On receiving a HUP signal, check to see whether the Ed25519
20187 signing key has changed, and reload it if so. Closes ticket 16790.
20189 o Major bugfixes (relay, Ed25519):
20190 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
20191 0.2.7.2-alpha. Reported by "s7r".
20192 - Improve handling of expired signing keys with offline master keys.
20193 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
20195 o Minor features (client-side privacy):
20196 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
20197 lifespan when IsolateSOCKSAuth and streams with SOCKS
20198 authentication are attached to the circuit. This allows
20199 applications like TorBrowser to manage circuit lifetime on their
20200 own. Implements feature 15482.
20201 - When logging malformed hostnames from SOCKS5 requests, respect
20202 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
20204 o Minor features (compilation):
20205 - Give a warning as early as possible when trying to build with an
20206 unsupported OpenSSL version. Closes ticket 16901.
20207 - Fail during configure if we're trying to build against an OpenSSL
20208 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
20209 which started requiring ECC.
20211 o Minor features (geoip):
20212 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
20215 o Minor features (hidden services):
20216 - Relays need to have the Fast flag to get the HSDir flag. As this
20217 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
20218 drop. This change should make some attacks against the hidden
20219 service directory system harder. Fixes ticket 15963.
20220 - Turn on hidden service statistics collection by setting the torrc
20221 option HiddenServiceStatistics to "1" by default. (This keeps
20222 track only of the fraction of traffic used by hidden services, and
20223 the total number of hidden services in existence.) Closes
20225 - Client now uses an introduction point failure cache to know when
20226 to fetch or keep a descriptor in their cache. Previously, failures
20227 were recorded implicitly, but not explicitly remembered. Closes
20230 o Minor features (testing, authorities, documentation):
20231 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
20232 explicitly manage consensus flags in testing networks. Patch by
20233 "robgjansen", modified by "teor". Implements part of ticket 14882.
20235 o Minor bugfixes (security, exit policies):
20236 - ExitPolicyRejectPrivate now also rejects the relay's published
20237 IPv6 address (if any), and any publicly routable IPv4 or IPv6
20238 addresses on any local interfaces. ticket 17027. Patch by "teor".
20239 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
20241 o Minor bug fixes (torrc exit policies):
20242 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
20243 produce IPv6 wildcard addresses. Previously they would produce
20244 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
20245 of bug 16069; bugfix on 0.2.4.7-alpha.
20246 - When parsing torrc ExitPolicies, we now warn for a number of cases
20247 where the user's intent is likely to differ from Tor's actual
20248 behavior. These include: using an IPv4 address with an accept6 or
20249 reject6 line; using "private" on an accept6 or reject6 line; and
20250 including any ExitPolicy lines after accept *:* or reject *:*.
20251 Related to ticket 16069.
20252 - When parsing torrc ExitPolicies, we now issue an info-level
20253 message when expanding an "accept/reject *" line to include both
20254 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
20255 - In each instance above, usage advice is provided to avoid the
20256 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
20257 16069; bugfix on 0.2.4.7-alpha.
20259 o Minor bugfixes (authority):
20260 - Don't assign "HSDir" to a router if it isn't Valid and Running.
20261 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
20262 - Downgrade log messages about Ed25519 key issues if they are in old
20263 cached router descriptors. Fixes part of bug 16286; bugfix
20265 - When we find an Ed25519 key issue in a cached descriptor, stop
20266 saying the descriptor was just "uploaded". Fixes another part of
20267 bug 16286; bugfix on 0.2.7.2-alpha.
20269 o Minor bugfixes (control port):
20270 - Repair a warning and a spurious result when getting the maximum
20271 number of file descriptors from the controller. Fixes bug 16697;
20272 bugfix on 0.2.7.2-alpha.
20274 o Minor bugfixes (correctness):
20275 - When calling channel_free_list(), avoid calling smartlist_remove()
20276 while inside a FOREACH loop. This partially reverts commit
20277 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
20278 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
20280 o Minor bugfixes (documentation):
20281 - Advise users on how to configure separate IPv4 and IPv6 exit
20282 policies in the manpage and sample torrcs. Related to ticket 16069.
20283 - Fix the usage message of tor-resolve(1) so that it no longer lists
20284 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
20285 - Fix an error in the manual page and comments for
20286 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
20287 required "ORPort connectivity". While this is true, it is in no
20288 way unique to the HSDir flag. Of all the flags, only HSDirs need a
20289 DirPort configured in order for the authorities to assign that
20290 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
20293 o Minor bugfixes (Ed25519):
20294 - Fix a memory leak when reading router descriptors with expired
20295 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
20297 o Minor bugfixes (linux seccomp2 sandbox):
20298 - Allow bridge authorities to run correctly under the seccomp2
20299 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
20300 - Allow routers with ed25519 keys to run correctly under the
20301 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
20303 o Minor bugfixes (open file limit):
20304 - Fix set_max_file_descriptors() to set by default the max open file
20305 limit to the current limit when setrlimit() fails. Fixes bug
20306 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
20308 o Minor bugfixes (portability):
20309 - Try harder to normalize the exit status of the Tor process to the
20310 standard-provided range. Fixes bug 16975; bugfix on every version
20312 - Check correctly for Windows socket errors in the workqueue
20313 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
20314 - Fix the behavior of crypto_rand_time_range() when told to consider
20315 times before 1970. (These times were possible when running in a
20316 simulated network environment where time()'s output starts at
20317 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
20318 - Restore correct operation of TLS client-cipher detection on
20319 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
20321 o Minor bugfixes (relay):
20322 - Ensure that worker threads actually exit when a fatal error or
20323 shutdown is indicated. This fix doesn't currently affect the
20324 behavior of Tor, because Tor workers never indicates fatal error
20325 or shutdown except in the unit tests. Fixes bug 16868; bugfix
20327 - Unblock threads before releasing the work queue mutex to ensure
20328 predictable scheduling behavior. Fixes bug 16644; bugfix
20331 o Code simplification and refactoring:
20332 - Change the function that's called when we need to retry all
20333 downloads so that it only reschedules the downloads to happen
20334 immediately, rather than launching them all at once itself. This
20335 further simplifies Tor's callgraph.
20336 - Move some format-parsing functions out of crypto.c and
20337 crypto_curve25519.c into crypto_format.c and/or util_format.c.
20338 - Move the client-only parts of init_keys() into a separate
20339 function. Closes ticket 16763.
20340 - Simplify the microdesc_free() implementation so that it no longer
20341 appears (to code analysis tools) to potentially invoke a huge
20342 suite of other microdesc functions.
20343 - Simply the control graph further by deferring the inner body of
20344 directory_all_unreachable() into a callback. Closes ticket 16762.
20345 - Treat the loss of an owning controller as equivalent to a SIGTERM
20346 signal. This removes a tiny amount of duplicated code, and
20347 simplifies our callgraph. Closes ticket 16788.
20348 - When generating an event to send to the controller, we no longer
20349 put the event over the network immediately. Instead, we queue
20350 these events, and use a Libevent callback to deliver them. This
20351 change simplifies Tor's callgraph by reducing the number of
20352 functions from which all other Tor functions are reachable. Closes
20354 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
20355 that try to scan or compile every file on Unix won't decide that
20357 - Remove the unused "nulterminate" argument from buf_pullup().
20360 - Recommend a 40 GB example AccountingMax in torrc.sample rather
20361 than a 4 GB max. Closes ticket 16742.
20362 - Include the TUNING document in our source tarball. It is referred
20363 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
20367 - The internal pure-C tor-fw-helper tool is now removed from the Tor
20368 distribution, in favor of the pure-Go clone available from
20369 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
20370 used by the C tor-fw-helper are not, in our opinion, very
20371 confidence- inspiring in their secure-programming techniques.
20372 Closes ticket 13338.
20373 - Remove the code that would try to aggressively flush controller
20374 connections while writing to them. This code was introduced in
20375 0.1.2.7-alpha, in order to keep output buffers from exceeding
20376 their limits. But there is no longer a maximum output buffer size,
20377 and flushing data in this way caused some undesirable recursions
20378 in our call graph. Closes ticket 16480.
20381 - Make "bridges+hs" the default test network. This tests almost all
20382 tor functionality during make test-network, while allowing tests
20383 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
20384 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
20385 (chutney). Patches by "teor".
20386 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
20387 by-side in the same parent directory. Closes ticket 16903. Patch
20389 - Use environment variables rather than autoconf substitutions to
20390 send variables from the build system to the test scripts. This
20391 change should be easier to maintain, and cause 'make distcheck' to
20392 work better than before. Fixes bug 17148.
20393 - Add a new set of callgraph analysis scripts that use clang to
20394 produce a list of which Tor functions are reachable from which
20395 other Tor functions. We're planning to use these to help simplify
20396 our code structure by identifying illogical dependencies.
20397 - Add new 'test-full' and 'test-full-online' targets to run all
20398 tests, including integration tests with stem and chutney.
20399 - Make the test-workqueue test work on Windows by initializing the
20400 network before we begin.
20401 - New make target (make test-network-all) to run multiple applicable
20402 chutney test cases. Patch from Teor; closes 16953.
20403 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
20404 functions in dns.c. Implements a portion of ticket 16831.
20405 - When building Tor with testing coverage enabled, run Chutney tests
20406 (if any) using the 'tor-cov' coverage binary.
20407 - When running test-network or test-stem, check for the absence of
20408 stem/chutney before doing any build operations.
20411 Changes in version 0.2.7.2-alpha - 2015-07-27
20412 This, the second alpha in the Tor 0.2.7 series, has a number of new
20413 features, including a way to manually pick the number of introduction
20414 points for hidden services, and the much stronger Ed25519 signing key
20415 algorithm for regular Tor relays (including support for encrypted
20416 offline identity keys in the new algorithm).
20418 Support for Ed25519 on relays is currently limited to signing router
20419 descriptors; later alphas in this series will extend Ed25519 key
20420 support to more parts of the Tor protocol.
20422 o Major features (Ed25519 identity keys, Proposal 220):
20423 - All relays now maintain a stronger identity key, using the Ed25519
20424 elliptic curve signature format. This master key is designed so
20425 that it can be kept offline. Relays also generate an online
20426 signing key, and a set of other Ed25519 keys and certificates.
20427 These are all automatically regenerated and rotated as needed.
20428 Implements part of ticket 12498.
20429 - Directory authorities now vote on Ed25519 identity keys along with
20430 RSA1024 keys. Implements part of ticket 12498.
20431 - Directory authorities track which Ed25519 identity keys have been
20432 used with which RSA1024 identity keys, and do not allow them to
20433 vary freely. Implements part of ticket 12498.
20434 - Microdescriptors now include Ed25519 identity keys. Implements
20435 part of ticket 12498.
20436 - Add support for offline encrypted Ed25519 master keys. To use this
20437 feature on your tor relay, run "tor --keygen" to make a new master
20438 key (or to make a new signing key if you already have a master
20439 key). Closes ticket 13642.
20441 o Major features (Hidden services):
20442 - Add the torrc option HiddenServiceNumIntroductionPoints, to
20443 specify a fixed number of introduction points. Its maximum value
20444 is 10 and default is 3. Using this option can increase a hidden
20445 service's reliability under load, at the cost of making it more
20446 visible that the hidden service is facing extra load. Closes
20448 - Remove the adaptive algorithm for choosing the number of
20449 introduction points, which used to change the number of
20450 introduction points (poorly) depending on the number of
20451 connections the HS sees. Closes ticket 4862.
20453 o Major features (onion key cross-certification):
20454 - Relay descriptors now include signatures of their own identity
20455 keys, made using the TAP and ntor onion keys. These signatures
20456 allow relays to prove ownership of their own onion keys. Because
20457 of this change, microdescriptors will no longer need to include
20458 RSA identity keys. Implements proposal 228; closes ticket 12499.
20460 o Major features (performance):
20461 - Improve the runtime speed of Ed25519 operations by using the
20462 public-domain Ed25519-donna by Andrew M. ("floodyberry").
20463 Implements ticket 16467.
20464 - Improve the runtime speed of the ntor handshake by using an
20465 optimized curve25519 basepoint scalarmult implementation from the
20466 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
20467 ideas by Adam Langley. Implements ticket 9663.
20469 o Major bugfixes (client-side privacy, also in 0.2.6.9):
20470 - Properly separate out each SOCKSPort when applying stream
20471 isolation. The error occurred because each port's session group
20472 was being overwritten by a default value when the listener
20473 connection was initialized. Fixes bug 16247; bugfix on
20474 0.2.6.3-alpha. Patch by "jojelino".
20476 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
20477 - Stop refusing to store updated hidden service descriptors on a
20478 client. This reverts commit 9407040c59218 (which indeed fixed bug
20479 14219, but introduced a major hidden service reachability
20480 regression detailed in bug 16381). This is a temporary fix since
20481 we can live with the minor issue in bug 14219 (it just results in
20482 some load on the network) but the regression of 16381 is too much
20483 of a setback. First-round fix for bug 16381; bugfix
20486 o Major bugfixes (hidden services):
20487 - When cannibalizing a circuit for an introduction point, always
20488 extend to the chosen exit node (creating a 4 hop circuit).
20489 Previously Tor would use the current circuit exit node, which
20490 changed the original choice of introduction point, and could cause
20491 the hidden service to skip excluded introduction points or
20492 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
20495 o Major bugfixes (open file limit):
20496 - The open file limit wasn't checked before calling
20497 tor_accept_socket_nonblocking(), which would make Tor exceed the
20498 limit. Now, before opening a new socket, Tor validates the open
20499 file limit just before, and if the max has been reached, return an
20500 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
20502 o Major bugfixes (stability, also in 0.2.6.10):
20503 - Stop crashing with an assertion failure when parsing certain kinds
20504 of malformed or truncated microdescriptors. Fixes bug 16400;
20505 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20506 by "cypherpunks_backup".
20507 - Stop random client-side assertion failures that could occur when
20508 connecting to a busy hidden service, or connecting to a hidden
20509 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20512 o Minor features (directory authorities, security, also in 0.2.6.9):
20513 - The HSDir flag given by authorities now requires the Stable flag.
20514 For the current network, this results in going from 2887 to 2806
20515 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20516 attack by raising the effort for a relay to become Stable to
20517 require at the very least 7 days, while maintaining the 96 hours
20518 uptime requirement for HSDir. Implements ticket 8243.
20520 o Minor features (client):
20521 - Relax the validation of hostnames in SOCKS5 requests, allowing the
20522 character '_' to appear, in order to cope with domains observed in
20523 the wild that are serving non-RFC compliant records. Resolves
20525 - Relax the validation done to hostnames in SOCKS5 requests, and
20526 allow a single trailing '.' to cope with clients that pass FQDNs
20527 using that syntax to explicitly indicate that the domain name is
20528 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
20529 - Add GroupWritable and WorldWritable options to unix-socket based
20530 SocksPort and ControlPort options. These options apply to a single
20531 socket, and override {Control,Socks}SocketsGroupWritable. Closes
20534 o Minor features (control protocol):
20535 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
20536 the control protocol. Resolves ticket 15358.
20538 o Minor features (directory authorities):
20539 - Directory authorities no longer vote against the "Fast", "Stable",
20540 and "HSDir" flags just because they were going to vote against
20541 "Running": if the consensus turns out to be that the router was
20542 running, then the authority's vote should count. Patch from Peter
20543 Retzlaff; closes issue 8712.
20545 o Minor features (geoip, also in 0.2.6.10):
20546 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20547 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20549 o Minor features (hidden services):
20550 - Add the new options "HiddenServiceMaxStreams" and
20551 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
20552 limit the maximum number of simultaneous streams per circuit, and
20553 optionally tear down the circuit when the limit is exceeded. Part
20556 o Minor features (portability):
20557 - Use C99 variadic macros when the compiler is not GCC. This avoids
20558 failing compilations on MSVC, and fixes a log-file-based race
20559 condition in our old workarounds. Original patch from Gisle Vanem.
20561 o Minor bugfixes (compilation, also in 0.2.6.9):
20562 - Build with --enable-systemd correctly when libsystemd is
20563 installed, but systemd is not. Fixes bug 16164; bugfix on
20564 0.2.6.3-alpha. Patch from Peter Palfrader.
20566 o Minor bugfixes (controller):
20567 - Add the descriptor ID in each HS_DESC control event. It was
20568 missing, but specified in control-spec.txt. Fixes bug 15881;
20569 bugfix on 0.2.5.2-alpha.
20571 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
20572 - Check for failures from crypto_early_init, and refuse to continue.
20573 A previous typo meant that we could keep going with an
20574 uninitialized crypto library, and would have OpenSSL initialize
20575 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20576 when implementing ticket 4900. Patch by "teor".
20578 o Minor bugfixes (hidden services):
20579 - Fix a crash when reloading configuration while at least one
20580 configured and one ephemeral hidden service exists. Fixes bug
20581 16060; bugfix on 0.2.7.1-alpha.
20582 - Avoid crashing with a double-free bug when we create an ephemeral
20583 hidden service but adding it fails for some reason. Fixes bug
20584 16228; bugfix on 0.2.7.1-alpha.
20586 o Minor bugfixes (Linux seccomp2 sandbox):
20587 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
20588 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
20590 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
20591 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20592 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20593 on 0.2.6.3-alpha. Patch from "teor".
20595 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
20596 - Fix sandboxing to work when running as a relay, by allowing the
20597 renaming of secret_id_key, and allowing the eventfd2 and futex
20598 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
20600 - Allow systemd connections to work with the Linux seccomp2 sandbox
20601 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20604 o Minor bugfixes (relay):
20605 - Fix a rarely-encountered memory leak when failing to initialize
20606 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
20607 from "cypherpunks".
20609 o Minor bugfixes (systemd):
20610 - Fix an accidental formatting error that broke the systemd
20611 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
20612 - Tor's systemd unit file no longer contains extraneous spaces.
20613 These spaces would sometimes confuse tools like deb-systemd-
20614 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
20616 o Minor bugfixes (tests):
20617 - Use the configured Python executable when running test-stem-full.
20618 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
20620 o Minor bugfixes (tests, also in 0.2.6.9):
20621 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20622 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20624 o Minor bugfixes (threads, comments):
20625 - Always initialize return value in compute_desc_id in rendcommon.c
20626 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20627 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
20628 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20629 - Remove undefined directive-in-macro in test_util_writepid clang
20630 3.7 complains that using a preprocessor directive inside a macro
20631 invocation in test_util_writepid in test_util.c is undefined.
20632 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20634 o Code simplification and refactoring:
20635 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
20636 to ensure they remain consistent and visible everywhere.
20637 - Remove some vestigial workarounds for the MSVC6 compiler. We
20638 haven't supported that in ages.
20639 - The link authentication code has been refactored for better
20640 testability and reliability. It now uses code generated with the
20641 "trunnel" binary encoding generator, to reduce the risk of bugs
20642 due to programmer error. Done as part of ticket 12498.
20645 - Include a specific and (hopefully) accurate documentation of the
20646 torrc file's meta-format in doc/torrc_format.txt. This is mainly
20647 of interest to people writing programs to parse or generate torrc
20648 files. This document is not a commitment to long-term
20649 compatibility; some aspects of the current format are a bit
20650 ridiculous. Closes ticket 2325.
20652 o Removed features:
20653 - Tor no longer supports copies of OpenSSL that are missing support
20654 for Elliptic Curve Cryptography. (We began using ECC when
20655 available in 0.2.4.8-alpha, for more safe and efficient key
20656 negotiation.) In particular, support for at least one of P256 or
20657 P224 is now required, with manual configuration needed if only
20658 P224 is available. Resolves ticket 16140.
20659 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
20660 on an operating system that has not upgraded to OpenSSL 1.0 or
20661 later, and you compile Tor from source, you will need to install a
20662 more recent OpenSSL to link Tor against.) These versions of
20663 OpenSSL are still supported by the OpenSSL, but the numerous
20664 cryptographic improvements in later OpenSSL releases makes them a
20665 clear choice. Resolves ticket 16034.
20666 - Remove the HidServDirectoryV2 option. Now all relays offer to
20667 store hidden service descriptors. Related to 16543.
20668 - Remove the VoteOnHidServDirectoriesV2 option, since all
20669 authorities have long set it to 1. Closes ticket 16543.
20672 - Document use of coverity, clang static analyzer, and clang dynamic
20673 undefined behavior and address sanitizers in doc/HACKING. Include
20674 detailed usage instructions in the blacklist. Patch by "teor".
20675 Closes ticket 15817.
20676 - The link authentication protocol code now has extensive tests.
20677 - The relay descriptor signature testing code now has
20679 - The test_workqueue program now runs faster, and is enabled by
20680 default as a part of "make check".
20681 - Now that OpenSSL has its own scrypt implementation, add an unit
20682 test that checks for interoperability between libscrypt_scrypt()
20683 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
20684 and rely on EVP_PBE_scrypt() whenever possible. Resolves
20688 Changes in version 0.2.6.10 - 2015-07-12
20689 Tor version 0.2.6.10 fixes some significant stability and hidden
20690 service client bugs, bulletproofs the cryptography init process, and
20691 fixes a bug when using the sandbox code with some older versions of
20692 Linux. Everyone running an older version, especially an older version
20693 of 0.2.6, should upgrade.
20695 o Major bugfixes (hidden service clients, stability):
20696 - Stop refusing to store updated hidden service descriptors on a
20697 client. This reverts commit 9407040c59218 (which indeed fixed bug
20698 14219, but introduced a major hidden service reachability
20699 regression detailed in bug 16381). This is a temporary fix since
20700 we can live with the minor issue in bug 14219 (it just results in
20701 some load on the network) but the regression of 16381 is too much
20702 of a setback. First-round fix for bug 16381; bugfix
20705 o Major bugfixes (stability):
20706 - Stop crashing with an assertion failure when parsing certain kinds
20707 of malformed or truncated microdescriptors. Fixes bug 16400;
20708 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20709 by "cypherpunks_backup".
20710 - Stop random client-side assertion failures that could occur when
20711 connecting to a busy hidden service, or connecting to a hidden
20712 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20715 o Minor features (geoip):
20716 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20717 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20719 o Minor bugfixes (crypto error-handling):
20720 - Check for failures from crypto_early_init, and refuse to continue.
20721 A previous typo meant that we could keep going with an
20722 uninitialized crypto library, and would have OpenSSL initialize
20723 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20724 when implementing ticket 4900. Patch by "teor".
20726 o Minor bugfixes (Linux seccomp2 sandbox):
20727 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20728 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20729 on 0.2.6.3-alpha. Patch from "teor".
20732 Changes in version 0.2.6.9 - 2015-06-11
20733 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
20734 requirements for receiving an HSDir flag, and addresses some other small
20735 bugs in the systemd and sandbox code. Clients using circuit isolation
20736 should upgrade; all directory authorities should upgrade.
20738 o Major bugfixes (client-side privacy):
20739 - Properly separate out each SOCKSPort when applying stream
20740 isolation. The error occurred because each port's session group was
20741 being overwritten by a default value when the listener connection
20742 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
20745 o Minor feature (directory authorities, security):
20746 - The HSDir flag given by authorities now requires the Stable flag.
20747 For the current network, this results in going from 2887 to 2806
20748 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20749 attack by raising the effort for a relay to become Stable which
20750 takes at the very least 7 days to do so and by keeping the 96
20751 hours uptime requirement for HSDir. Implements ticket 8243.
20753 o Minor bugfixes (compilation):
20754 - Build with --enable-systemd correctly when libsystemd is
20755 installed, but systemd is not. Fixes bug 16164; bugfix on
20756 0.2.6.3-alpha. Patch from Peter Palfrader.
20758 o Minor bugfixes (Linux seccomp2 sandbox):
20759 - Fix sandboxing to work when running as a relaymby renaming of
20760 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
20761 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
20762 - Allow systemd connections to work with the Linux seccomp2 sandbox
20763 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20766 o Minor bugfixes (tests):
20767 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20768 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20771 Changes in version 0.2.6.8 - 2015-05-21
20772 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
20773 fixes an authority-side bug in assigning the HSDir flag. All directory
20774 authorities should upgrade.
20776 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
20777 - Revert commit that made directory authorities assign the HSDir
20778 flag to relays without a DirPort; this was bad because such relays
20779 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20782 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
20783 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20784 a client authorized hidden service. Fixes bug 15823; bugfix
20787 o Minor features (geoip):
20788 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20789 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20793 Changes in version 0.2.7.1-alpha - 2015-05-12
20794 Tor 0.2.7.1-alpha is the first alpha release in its series. It
20795 includes numerous small features and bugfixes against previous Tor
20796 versions, and numerous small infrastructure improvements. The most
20797 notable features are several new ways for controllers to interact with
20798 the hidden services subsystem.
20800 o New system requirements:
20801 - Tor no longer includes workarounds to support Libevent versions
20802 before 1.3e. Libevent 2.0 or later is recommended. Closes
20805 o Major features (controller):
20806 - Add the ADD_ONION and DEL_ONION commands that allow the creation
20807 and management of hidden services via the controller. Closes
20809 - New "GETINFO onions/current" and "GETINFO onions/detached"
20810 commands to get information about hidden services created via the
20811 controller. Part of ticket 6411.
20812 - New HSFETCH command to launch a request for a hidden service
20813 descriptor. Closes ticket 14847.
20814 - New HSPOST command to upload a hidden service descriptor. Closes
20815 ticket 3523. Patch by "DonnchaC".
20817 o Major bugfixes (hidden services):
20818 - Revert commit that made directory authorities assign the HSDir
20819 flag to relays without a DirPort; this was bad because such relays
20820 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20823 o Minor features (clock-jump tolerance):
20824 - Recover better when our clock jumps back many hours, like might
20825 happen for Tails or Whonix users who start with a very wrong
20826 hardware clock, use Tor to discover a more accurate time, and then
20827 fix their clock. Resolves part of ticket 8766.
20829 o Minor features (command-line interface):
20830 - Make --hash-password imply --hush to prevent unnecessary noise.
20831 Closes ticket 15542. Patch from "cypherpunks".
20832 - Print a warning whenever we find a relative file path being used
20833 as torrc option. Resolves issue 14018.
20835 o Minor features (controller):
20836 - Add DirAuthority lines for default directory authorities to the
20837 output of the "GETINFO config/defaults" command if not already
20838 present. Implements ticket 14840.
20839 - Controllers can now use "GETINFO hs/client/desc/id/..." to
20840 retrieve items from the client's hidden service descriptor cache.
20841 Closes ticket 14845.
20842 - Implement a new controller command "GETINFO status/fresh-relay-
20843 descs" to fetch a descriptor/extrainfo pair that was generated on
20844 demand just for the controller's use. Implements ticket 14784.
20846 o Minor features (DoS-resistance):
20847 - Make it harder for attackers to overload hidden services with
20848 introductions, by blocking multiple introduction requests on the
20849 same circuit. Resolves ticket 15515.
20851 o Minor features (geoip):
20852 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20853 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20856 o Minor features (HS popularity countermeasure):
20857 - To avoid leaking HS popularity, don't cycle the introduction point
20858 when we've handled a fixed number of INTRODUCE2 cells but instead
20859 cycle it when a random number of introductions is reached, thus
20860 making it more difficult for an attacker to find out the amount of
20861 clients that have used the introduction point for a specific HS.
20862 Closes ticket 15745.
20864 o Minor features (logging):
20865 - Include the Tor version in all LD_BUG log messages, since people
20866 tend to cut and paste those into the bugtracker. Implements
20869 o Minor features (pluggable transports):
20870 - When launching managed pluggable transports on Linux systems,
20871 attempt to have the kernel deliver a SIGTERM on tor exit if the
20872 pluggable transport process is still running. Resolves
20874 - When launching managed pluggable transports, setup a valid open
20875 stdin in the child process that can be used to detect if tor has
20876 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
20877 can be used by implementations to detect this new behavior.
20878 Resolves ticket 15435.
20880 o Minor features (testing):
20881 - Add a test to verify that the compiler does not eliminate our
20882 memwipe() implementation. Closes ticket 15377.
20883 - Add make rule `check-changes` to verify the format of changes
20884 files. Closes ticket 15180.
20885 - Add unit tests for control_event_is_interesting(). Add a compile-
20886 time check that the number of events doesn't exceed the capacity
20887 of control_event_t.event_mask. Closes ticket 15431, checks for
20888 bugs similar to 13085. Patch by "teor".
20889 - Command-line argument tests moved to Stem. Resolves ticket 14806.
20890 - Integrate the ntor, backtrace, and zero-length keys tests into the
20891 automake test suite. Closes ticket 15344.
20892 - Remove assertions during builds to determine Tor's test coverage.
20893 We don't want to trigger these even in assertions, so including
20894 them artificially makes our branch coverage look worse than it is.
20895 This patch provides the new test-stem-full and coverage-html-full
20896 configure options. Implements ticket 15400.
20898 o Minor bugfixes (build):
20899 - Improve out-of-tree builds by making non-standard rules work and
20900 clean up additional files and directories. Fixes bug 15053; bugfix
20903 o Minor bugfixes (command-line interface):
20904 - When "--quiet" is provided along with "--validate-config", do not
20905 write anything to stdout on success. Fixes bug 14994; bugfix
20907 - When complaining about bad arguments to "--dump-config", use
20908 stderr, not stdout.
20910 o Minor bugfixes (configuration, unit tests):
20911 - Only add the default fallback directories when the DirAuthorities,
20912 AlternateDirAuthority, and FallbackDir directory config options
20913 are set to their defaults. The default fallback directory list is
20914 currently empty, this fix will only change tor's behavior when it
20915 has default fallback directories. Includes unit tests for
20916 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
20917 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
20919 o Minor bugfixes (correctness):
20920 - For correctness, avoid modifying a constant string in
20921 handle_control_postdescriptor. Fixes bug 15546; bugfix
20923 - Remove side-effects from tor_assert() calls. This was harmless,
20924 because we never disable assertions, but it is bad style and
20925 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
20928 o Minor bugfixes (hidden service):
20929 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20930 a client authorized hidden service. Fixes bug 15823; bugfix
20932 - Remove an extraneous newline character from the end of hidden
20933 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
20935 o Minor bugfixes (interface):
20936 - Print usage information for --dump-config when it is used without
20937 an argument. Also, fix the error message to use different wording
20938 and add newline at the end. Fixes bug 15541; bugfix
20941 o Minor bugfixes (logs):
20942 - When building Tor under Clang, do not include an extra set of
20943 parentheses in log messages that include function names. Fixes bug
20944 15269; bugfix on every released version of Tor when compiled with
20945 recent enough Clang.
20947 o Minor bugfixes (network):
20948 - When attempting to use fallback technique for network interface
20949 lookup, disregard loopback and multicast addresses since they are
20950 unsuitable for public communications.
20952 o Minor bugfixes (statistics):
20953 - Disregard the ConnDirectionStatistics torrc options when Tor is
20954 not a relay since in that mode of operation no sensible data is
20955 being collected and because Tor might run into measurement hiccups
20956 when running as a client for some time, then becoming a relay.
20957 Fixes bug 15604; bugfix on 0.2.2.35.
20959 o Minor bugfixes (test networks):
20960 - When self-testing reachability, use ExtendAllowPrivateAddresses to
20961 determine if local/private addresses imply reachability. The
20962 previous fix used TestingTorNetwork, which implies
20963 ExtendAllowPrivateAddresses, but this excluded rare configurations
20964 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
20965 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
20966 issue discovered by CJ Ess.
20968 o Minor bugfixes (testing):
20969 - Check for matching value in server response in ntor_ref.py. Fixes
20970 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
20972 - Set the severity correctly when testing
20973 get_interface_addresses_ifaddrs() and
20974 get_interface_addresses_win32(), so that the tests fail gracefully
20975 instead of triggering an assertion. Fixes bug 15759; bugfix on
20976 0.2.6.3-alpha. Reported by Nicolas Derive.
20978 o Code simplification and refactoring:
20979 - Move the hacky fallback code out of get_interface_address6() into
20980 separate function and get it covered with unit-tests. Resolves
20982 - Refactor hidden service client-side cache lookup to intelligently
20983 report its various failure cases, and disentangle failure cases
20984 involving a lack of introduction points. Closes ticket 14391.
20985 - Use our own Base64 encoder instead of OpenSSL's, to allow more
20986 control over the output. Part of ticket 15652.
20989 - Improve the descriptions of statistics-related torrc options in
20990 the manpage to describe rationale and possible uses cases. Fixes
20992 - Improve the layout and formatting of ./configure --help messages.
20993 Closes ticket 15024. Patch from "cypherpunks".
20994 - Standardize on the term "server descriptor" in the manual page.
20995 Previously, we had used "router descriptor", "server descriptor",
20996 and "relay descriptor" interchangeably. Part of ticket 14987.
20999 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
21000 and always use the internal Base64 decoder. The internal decoder
21001 has been part of tor since 0.2.0.10-alpha, and no one should
21002 be using the OpenSSL one. Part of ticket 15652.
21003 - Remove the 'tor_strclear()' function; use memwipe() instead.
21004 Closes ticket 14922.
21006 o Removed features:
21007 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
21008 fingerprinting we now recommend pluggable transports; for forward-
21009 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
21010 - Remove the undocumented "--digests" command-line option. It
21011 complicated our build process, caused subtle build issues on
21012 multiple platforms, and is now redundant since we started
21013 including git version identifiers. Closes ticket 14742.
21014 - Tor no longer contains checks for ancient directory cache versions
21015 that didn't know about microdescriptors.
21016 - Tor no longer contains workarounds for stat files generated by
21017 super-old versions of Tor that didn't choose guards sensibly.
21020 Changes in version 0.2.4.27 - 2015-04-06
21021 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
21022 could be used by an attacker to crash hidden services, or crash clients
21023 visiting hidden services. Hidden services should upgrade as soon as
21024 possible; clients should upgrade whenever packages become available.
21026 This release also backports a simple improvement to make hidden
21027 services a bit less vulnerable to denial-of-service attacks.
21029 o Major bugfixes (security, hidden service):
21030 - Fix an issue that would allow a malicious client to trigger an
21031 assertion failure and halt a hidden service. Fixes bug 15600;
21032 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
21033 - Fix a bug that could cause a client to crash with an assertion
21034 failure when parsing a malformed hidden service descriptor. Fixes
21035 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
21037 o Minor features (DoS-resistance, hidden service):
21038 - Introduction points no longer allow multiple INTRODUCE1 cells to
21039 arrive on the same circuit. This should make it more expensive for
21040 attackers to overwhelm hidden services with introductions.
21041 Resolves ticket 15515.
21044 Changes in version 0.2.5.12 - 2015-04-06
21045 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
21046 could be used by an attacker to crash hidden services, or crash clients
21047 visiting hidden services. Hidden services should upgrade as soon as
21048 possible; clients should upgrade whenever packages become available.
21050 This release also backports a simple improvement to make hidden
21051 services a bit less vulnerable to denial-of-service attacks.
21053 o Major bugfixes (security, hidden service):
21054 - Fix an issue that would allow a malicious client to trigger an
21055 assertion failure and halt a hidden service. Fixes bug 15600;
21056 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
21057 - Fix a bug that could cause a client to crash with an assertion
21058 failure when parsing a malformed hidden service descriptor. Fixes
21059 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
21061 o Minor features (DoS-resistance, hidden service):
21062 - Introduction points no longer allow multiple INTRODUCE1 cells to
21063 arrive on the same circuit. This should make it more expensive for
21064 attackers to overwhelm hidden services with introductions.
21065 Resolves ticket 15515.
21068 Changes in version 0.2.6.7 - 2015-04-06
21069 Tor 0.2.6.7 fixes two security issues that could be used by an
21070 attacker to crash hidden services, or crash clients visiting hidden
21071 services. Hidden services should upgrade as soon as possible; clients
21072 should upgrade whenever packages become available.
21074 This release also contains two simple improvements to make hidden
21075 services a bit less vulnerable to denial-of-service attacks.
21077 o Major bugfixes (security, hidden service):
21078 - Fix an issue that would allow a malicious client to trigger an
21079 assertion failure and halt a hidden service. Fixes bug 15600;
21080 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
21081 - Fix a bug that could cause a client to crash with an assertion
21082 failure when parsing a malformed hidden service descriptor. Fixes
21083 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
21085 o Minor features (DoS-resistance, hidden service):
21086 - Introduction points no longer allow multiple INTRODUCE1 cells to
21087 arrive on the same circuit. This should make it more expensive for
21088 attackers to overwhelm hidden services with introductions.
21089 Resolves ticket 15515.
21090 - Decrease the amount of reattempts that a hidden service performs
21091 when its rendezvous circuits fail. This reduces the computational
21092 cost for running a hidden service under heavy load. Resolves
21096 Changes in version 0.2.6.6 - 2015-03-24
21097 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
21099 It adds numerous safety, security, correctness, and performance
21100 improvements. Client programs can be configured to use more kinds of
21101 sockets, AutomapHosts works better, the multithreading backend is
21102 improved, cell transmission is refactored, test coverage is much
21103 higher, more denial-of-service attacks are handled, guard selection is
21104 improved to handle long-term guards better, pluggable transports
21105 should work a bit better, and some annoying hidden service performance
21106 bugs should be addressed.
21108 o Minor bugfixes (portability):
21109 - Use the correct datatype in the SipHash-2-4 function to prevent
21110 compilers from assuming any sort of alignment. Fixes bug 15436;
21111 bugfix on 0.2.5.3-alpha.
21113 Changes in version 0.2.6.5-rc - 2015-03-18
21114 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
21115 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
21117 o Major bugfixes (client):
21118 - Avoid crashing when making certain configuration option changes on
21119 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
21122 o Major bugfixes (pluggable transports):
21123 - Initialize the extended OR Port authentication cookie before
21124 launching pluggable transports. This prevents a race condition
21125 that occurred when server-side pluggable transports would cache the
21126 authentication cookie before it has been (re)generated. Fixes bug
21127 15240; bugfix on 0.2.5.1-alpha.
21129 o Major bugfixes (portability):
21130 - Do not crash on startup when running on Solaris. Fixes a bug
21131 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
21134 o Minor features (heartbeat):
21135 - On relays, report how many connections we negotiated using each
21136 version of the Tor link protocols. This information will let us
21137 know if removing support for very old versions of the Tor
21138 protocols is harming the network. Closes ticket 15212.
21140 o Code simplification and refactoring:
21141 - Refactor main loop to extract the 'loop' part. This makes it
21142 easier to run Tor under Shadow. Closes ticket 15176.
21145 Changes in version 0.2.5.11 - 2015-03-17
21146 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
21148 It backports several bugfixes from the 0.2.6 branch, including a
21149 couple of medium-level security fixes for relays and exit nodes.
21150 It also updates the list of directory authorities.
21152 o Directory authority changes:
21153 - Remove turtles as a directory authority.
21154 - Add longclaw as a new (v3) directory authority. This implements
21155 ticket 13296. This keeps the directory authority count at 9.
21156 - The directory authority Faravahar has a new IP address. This
21157 closes ticket 14487.
21159 o Major bugfixes (crash, OSX, security):
21160 - Fix a remote denial-of-service opportunity caused by a bug in
21161 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
21164 o Major bugfixes (relay, stability, possible security):
21165 - Fix a bug that could lead to a relay crashing with an assertion
21166 failure if a buffer of exactly the wrong layout was passed to
21167 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
21168 0.2.0.10-alpha. Patch from 'cypherpunks'.
21169 - Do not assert if the 'data' pointer on a buffer is advanced to the
21170 very end of the buffer; log a BUG message instead. Only assert if
21171 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
21173 o Major bugfixes (exit node stability):
21174 - Fix an assertion failure that could occur under high DNS load.
21175 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21176 diagnosed and fixed by "cypherpunks".
21178 o Major bugfixes (Linux seccomp2 sandbox):
21179 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
21180 crash during attempts to call wait4. Fixes bug 15088; bugfix on
21181 0.2.5.1-alpha. Patch from "sanic".
21183 o Minor features (controller):
21184 - New "GETINFO bw-event-cache" to get information about recent
21185 bandwidth events. Closes ticket 14128. Useful for controllers to
21186 get recent bandwidth history after the fix for ticket 13988.
21188 o Minor features (geoip):
21189 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
21190 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
21193 o Minor bugfixes (client, automapping):
21194 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
21195 no value follows the option. Fixes bug 14142; bugfix on
21196 0.2.4.7-alpha. Patch by "teor".
21197 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
21198 14195; bugfix on 0.1.0.1-rc.
21200 o Minor bugfixes (compilation):
21201 - Build without warnings with the stock OpenSSL srtp.h header, which
21202 has a duplicate declaration of SSL_get_selected_srtp_profile().
21203 Fixes bug 14220; this is OpenSSL's bug, not ours.
21205 o Minor bugfixes (directory authority):
21206 - Allow directory authorities to fetch more data from one another if
21207 they find themselves missing lots of votes. Previously, they had
21208 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21209 bugfix on 0.1.2.5-alpha.
21210 - Enlarge the buffer to read bwauth generated files to avoid an
21211 issue when parsing the file in dirserv_read_measured_bandwidths().
21212 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21214 o Minor bugfixes (statistics):
21215 - Increase period over which bandwidth observations are aggregated
21216 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21218 o Minor bugfixes (preventative security, C safety):
21219 - When reading a hexadecimal, base-32, or base-64 encoded value from
21220 a string, always overwrite the whole output buffer. This prevents
21221 some bugs where we would look at (but fortunately, not reveal)
21222 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21226 Changes in version 0.2.4.26 - 2015-03-17
21227 Tor 0.2.4.26 includes an updated list of directory authorities. It
21228 also backports a couple of stability and security bugfixes from 0.2.5
21231 o Directory authority changes:
21232 - Remove turtles as a directory authority.
21233 - Add longclaw as a new (v3) directory authority. This implements
21234 ticket 13296. This keeps the directory authority count at 9.
21235 - The directory authority Faravahar has a new IP address. This
21236 closes ticket 14487.
21238 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
21239 - Fix an assertion failure that could occur under high DNS load.
21240 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21241 diagnosed and fixed by "cypherpunks".
21243 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
21244 - Fix a bug that could lead to a relay crashing with an assertion
21245 failure if a buffer of exactly the wrong layout was passed to
21246 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
21247 0.2.0.10-alpha. Patch from 'cypherpunks'.
21248 - Do not assert if the 'data' pointer on a buffer is advanced to the
21249 very end of the buffer; log a BUG message instead. Only assert if
21250 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
21252 o Minor features (geoip):
21253 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
21254 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
21257 Changes in version 0.2.6.4-rc - 2015-03-09
21258 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
21259 attacker might be able to use in order to crash certain Tor
21260 directories. It also resolves some minor issues left over from, or
21261 introduced in, Tor 0.2.6.3-alpha or earlier.
21263 o Major bugfixes (crash, OSX, security):
21264 - Fix a remote denial-of-service opportunity caused by a bug in
21265 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
21268 o Major bugfixes (relay, stability, possible security):
21269 - Fix a bug that could lead to a relay crashing with an assertion
21270 failure if a buffer of exactly the wrong layout is passed to
21271 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
21272 0.2.0.10-alpha. Patch from "cypherpunks".
21273 - Do not assert if the 'data' pointer on a buffer is advanced to the
21274 very end of the buffer; log a BUG message instead. Only assert if
21275 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
21277 o Major bugfixes (FreeBSD IPFW transparent proxy):
21278 - Fix address detection with FreeBSD transparent proxies, when
21279 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
21282 o Major bugfixes (Linux seccomp2 sandbox):
21283 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
21284 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
21286 - Allow AF_UNIX hidden services to be used with the seccomp2
21287 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
21288 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
21289 crash during attempts to call wait4. Fixes bug 15088; bugfix on
21290 0.2.5.1-alpha. Patch from "sanic".
21292 o Minor features (controller):
21293 - Messages about problems in the bootstrap process now include
21294 information about the server we were trying to connect to when we
21295 noticed the problem. Closes ticket 15006.
21297 o Minor features (geoip):
21298 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
21299 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
21302 o Minor features (logs):
21303 - Quiet some log messages in the heartbeat and at startup. Closes
21306 o Minor bugfixes (certificate handling):
21307 - If an authority operator accidentally makes a signing certificate
21308 with a future publication time, do not discard its real signing
21309 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
21310 - Remove any old authority certificates that have been superseded
21311 for at least two days. Previously, we would keep superseded
21312 certificates until they expired, if they were published close in
21313 time to the certificate that superseded them. Fixes bug 11454;
21314 bugfix on 0.2.1.8-alpha.
21316 o Minor bugfixes (compilation):
21317 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
21319 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
21322 o Minor bugfixes (testing):
21323 - Fix endianness issues in unit test for resolve_my_address() to
21324 have it pass on big endian systems. Fixes bug 14980; bugfix on
21326 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
21327 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
21328 - When running the new 'make test-stem' target, use the configured
21329 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
21330 from "cypherpunks".
21331 - When running the zero-length-keys tests, do not use the default
21332 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
21335 o Directory authority IP change:
21336 - The directory authority Faravahar has a new IP address. This
21337 closes ticket 14487.
21340 - Remove some lingering dead code that once supported mempools.
21341 Mempools were disabled by default in 0.2.5, and removed entirely
21342 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
21346 Changes in version 0.2.6.3-alpha - 2015-02-19
21347 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
21348 the 0.2.6.x series. It introduces support for more kinds of sockets,
21349 makes it harder to accidentally run an exit, improves our
21350 multithreading backend, incorporates several fixes for the
21351 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
21353 If no major regressions or security holes are found in this version,
21354 the next version will be a release candidate.
21356 o Deprecated versions:
21357 - Tor relays older than 0.2.4.18-rc are no longer allowed to
21358 advertise themselves on the network. Closes ticket 13555.
21360 o Major features (security, unix domain sockets):
21361 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
21362 applications can reach Tor without having to create AF_INET or
21363 AF_INET6 sockets, meaning they can completely disable their
21364 ability to make non-Tor network connections. To create a socket of
21365 this type, use "SocksPort unix:/path/to/socket". Implements
21367 - Support mapping hidden service virtual ports to AF_UNIX sockets.
21368 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
21369 Implements ticket 11485.
21371 o Major features (changed defaults):
21372 - Prevent relay operators from unintentionally running exits: When a
21373 relay is configured as an exit node, we now warn the user unless
21374 the "ExitRelay" option is set to 1. We warn even more loudly if
21375 the relay is configured with the default exit policy, since this
21376 can indicate accidental misconfiguration. Setting "ExitRelay 0"
21377 stops Tor from running as an exit relay. Closes ticket 10067.
21379 o Major features (directory system):
21380 - When downloading server- or microdescriptors from a directory
21381 server, we no longer launch multiple simultaneous requests to the
21382 same server. This reduces load on the directory servers,
21383 especially when directory guards are in use. Closes ticket 9969.
21384 - When downloading server- or microdescriptors over a tunneled
21385 connection, do not limit the length of our requests to what the
21386 Squid proxy is willing to handle. Part of ticket 9969.
21387 - Authorities can now vote on the correct digests and latest
21388 versions for different software packages. This allows packages
21389 that include Tor to use the Tor authority system as a way to get
21390 notified of updates and their correct digests. Implements proposal
21391 227. Closes ticket 10395.
21393 o Major features (guards):
21394 - Introduce the Guardfraction feature to improves load balancing on
21395 guard nodes. Specifically, it aims to reduce the traffic gap that
21396 guard nodes experience when they first get the Guard flag. This is
21397 a required step if we want to increase the guard lifetime to 9
21398 months or greater. Closes ticket 9321.
21400 o Major features (performance):
21401 - Make the CPU worker implementation more efficient by avoiding the
21402 kernel and lengthening pipelines. The original implementation used
21403 sockets to transfer data from the main thread to the workers, and
21404 didn't allow any thread to be assigned more than a single piece of
21405 work at once. The new implementation avoids communications
21406 overhead by making requests in shared memory, avoiding kernel IO
21407 where possible, and keeping more requests in flight at once.
21408 Implements ticket 9682.
21410 o Major features (relay):
21411 - Raise the minimum acceptable configured bandwidth rate for bridges
21412 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
21413 20 KiB/sec.) Closes ticket 13822.
21415 o Major bugfixes (exit node stability):
21416 - Fix an assertion failure that could occur under high DNS load.
21417 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21418 diagnosed and fixed by "cypherpunks".
21420 o Major bugfixes (mixed relay-client operation):
21421 - When running as a relay and client at the same time (not
21422 recommended), if we decide not to use a new guard because we want
21423 to retry older guards, only close the locally-originating circuits
21424 passing through that guard. Previously we would close all the
21425 circuits through that guard. Fixes bug 9819; bugfix on
21426 0.2.1.1-alpha. Reported by "skruffy".
21428 o Minor features (build):
21429 - New --disable-system-torrc compile-time option to prevent Tor from
21430 looking for the system-wide torrc or torrc-defaults files.
21431 Resolves ticket 13037.
21433 o Minor features (controller):
21434 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
21435 events so controllers can observe circuit isolation inputs. Closes
21437 - ControlPort now supports the unix:/path/to/socket syntax as an
21438 alternative to the ControlSocket option, for consistency with
21439 SocksPort and HiddenServicePort. Closes ticket 14451.
21440 - New "GETINFO bw-event-cache" to get information about recent
21441 bandwidth events. Closes ticket 14128. Useful for controllers to
21442 get recent bandwidth history after the fix for ticket 13988.
21444 o Minor features (Denial of service resistance):
21445 - Count the total number of bytes used storing hidden service
21446 descriptors against the value of MaxMemInQueues. If we're low on
21447 memory, and more than 20% of our memory is used holding hidden
21448 service descriptors, free them until no more than 10% of our
21449 memory holds hidden service descriptors. Free the least recently
21450 fetched descriptors first. Resolves ticket 13806.
21451 - When we have recently been under memory pressure (over 3/4 of
21452 MaxMemInQueues is allocated), then allocate smaller zlib objects
21453 for small requests. Closes ticket 11791.
21455 o Minor features (geoip):
21456 - Update geoip and geoip6 files to the January 7 2015 Maxmind
21457 GeoLite2 Country database.
21459 o Minor features (guard nodes):
21460 - Reduce the time delay before saving guard status to disk from 10
21461 minutes to 30 seconds (or from one hour to 10 minutes if
21462 AvoidDiskWrites is set). Closes ticket 12485.
21464 o Minor features (hidden service):
21465 - Make Sybil attacks against hidden services harder by changing the
21466 minimum time required to get the HSDir flag from 25 hours up to 96
21467 hours. Addresses ticket 14149.
21468 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
21469 services to disable the anti-scanning feature introduced in
21470 0.2.6.2-alpha. With this option not set, a connection to an
21471 unlisted port closes the circuit. With this option set, only a
21472 RELAY_DONE cell is sent. Closes ticket 14084.
21474 o Minor features (interface):
21475 - Implement "-f -" command-line option to read torrc configuration
21476 from standard input, if you don't want to store the torrc file in
21477 the file system. Implements feature 13865.
21479 o Minor features (logging):
21480 - Add a count of unique clients to the bridge heartbeat message.
21481 Resolves ticket 6852.
21482 - Suppress "router info incompatible with extra info" message when
21483 reading extrainfo documents from cache. (This message got loud
21484 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
21486 - Elevate hidden service authorized-client message from DEBUG to
21487 INFO. Closes ticket 14015.
21489 o Minor features (stability):
21490 - Add assertions in our hash-table iteration code to check for
21491 corrupted values that could cause infinite loops. Closes
21494 o Minor features (systemd):
21495 - Various improvements and modernizations in systemd hardening
21496 support. Closes ticket 13805. Patch from Craig Andrews.
21498 o Minor features (testing networks):
21499 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
21500 and the default on a testing network to 2 minutes. Drop the
21501 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
21502 keep the default on a testing network at 30 seconds. This reduces
21503 HS bootstrap time to around 25 seconds. Also, change the default
21504 time in test-network.sh to match. Closes ticket 13401. Patch
21506 - Create TestingDirAuthVoteHSDir to correspond to
21507 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
21508 HSDir flag for the listed relays regardless of uptime or ORPort
21509 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
21510 Partial implementation for ticket 14067. Patch by "teor".
21512 o Minor features (tor2web mode):
21513 - Introduce the config option Tor2webRendezvousPoints, which allows
21514 clients in Tor2webMode to select a specific Rendezvous Point to be
21515 used in HS circuits. This might allow better performance for
21516 Tor2Web nodes. Implements ticket 12844.
21518 o Minor bugfixes (client DNS):
21519 - Report the correct cached DNS expiration times on SOCKS port or in
21520 DNS replies. Previously, we would report everything as "never
21521 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
21522 - Avoid a small memory leak when we find a cached answer for a
21523 reverse DNS lookup in a client-side DNS cache. (Remember, client-
21524 side DNS caching is off by default, and is not recommended.) Fixes
21525 bug 14259; bugfix on 0.2.0.1-alpha.
21527 o Minor bugfixes (client, automapping):
21528 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
21529 no value follows the option. Fixes bug 14142; bugfix on
21530 0.2.4.7-alpha. Patch by "teor".
21531 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
21532 14195; bugfix on 0.1.0.1-rc.
21533 - Prevent changes to other options from removing the wildcard value
21534 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
21536 - Allow MapAddress and AutomapHostsOnResolve to work together when
21537 an address is mapped into another address type (like .onion) that
21538 must be automapped at resolve time. Fixes bug 7555; bugfix
21541 o Minor bugfixes (client, bridges):
21542 - When we are using bridges and we had a network connectivity
21543 problem, only retry connecting to our currently configured
21544 bridges, not all bridges we know about and remember using. Fixes
21545 bug 14216; bugfix on 0.2.2.17-alpha.
21547 o Minor bugfixes (client, IPv6):
21548 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
21549 flag is not set; and not because the NoIPv4Traffic flag was set.
21550 Previously we'd looked at the NoIPv4Traffic flag for both types of
21551 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
21553 o Minor bugfixes (compilation):
21554 - The address of an array in the middle of a structure will always
21555 be non-NULL. clang recognises this and complains. Disable the
21556 tautologous and redundant check to silence this warning. Fixes bug
21557 14001; bugfix on 0.2.1.2-alpha.
21558 - Avoid warnings when building with systemd 209 or later. Fixes bug
21559 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
21560 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
21561 Addresses ticket 14188.
21562 - Build without warnings with the stock OpenSSL srtp.h header, which
21563 has a duplicate declaration of SSL_get_selected_srtp_profile().
21564 Fixes bug 14220; this is OpenSSL's bug, not ours.
21565 - Do not compile any code related to Tor2Web mode when Tor2Web mode
21566 is not enabled at compile time. Previously, this code was included
21567 in a disabled state. See discussion on ticket 12844.
21568 - Remove the --disable-threads configure option again. It was
21569 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
21570 14819; bugfix on 0.2.6.2-alpha.
21572 o Minor bugfixes (controller):
21573 - Report "down" in response to the "GETINFO entry-guards" command
21574 when relays are down with an unreachable_since value. Previously,
21575 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
21576 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
21577 14116; bugfix on 0.2.2.9-alpha.
21578 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
21579 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
21581 o Minor bugfixes (directory authority):
21582 - Allow directory authorities to fetch more data from one another if
21583 they find themselves missing lots of votes. Previously, they had
21584 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21585 bugfix on 0.1.2.5-alpha.
21586 - Do not attempt to download extrainfo documents which we will be
21587 unable to validate with a matching server descriptor. Fixes bug
21588 13762; bugfix on 0.2.0.1-alpha.
21589 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
21590 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
21591 - Enlarge the buffer to read bwauth generated files to avoid an
21592 issue when parsing the file in dirserv_read_measured_bandwidths().
21593 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21595 o Minor bugfixes (file handling):
21596 - Stop failing when key files are zero-length. Instead, generate new
21597 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
21598 on all versions of Tor. Patch by "teor".
21599 - Stop generating a fresh .old RSA onion key file when the .old file
21600 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
21601 - Avoid overwriting .old key files with empty key files.
21602 - Skip loading zero-length extrainfo store, router store, stats,
21603 state, and key files.
21604 - Avoid crashing when trying to reload a torrc specified as a
21605 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
21608 o Minor bugfixes (hidden services):
21609 - Close the introduction circuit when we have no more usable intro
21610 points, instead of waiting for it to time out. This also ensures
21611 that no follow-up HS descriptor fetch is triggered when the
21612 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
21613 - When fetching a hidden service descriptor for a down service that
21614 was recently up, do not keep refetching until we try the same
21615 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
21616 - Successfully launch Tor with a nonexistent hidden service
21617 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
21618 14106; bugfix on 0.2.6.2-alpha.
21620 o Minor bugfixes (logging):
21621 - Avoid crashing when there are more log domains than entries in
21622 domain_list. Bugfix on 0.2.3.1-alpha.
21623 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
21625 - Don't log messages to stdout twice when starting up. Fixes bug
21626 13993; bugfix on 0.2.6.1-alpha.
21628 o Minor bugfixes (parsing):
21629 - Stop accepting milliseconds (or other junk) at the end of
21630 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
21631 - Support two-number and three-number version numbers correctly, in
21632 case we change the Tor versioning system in the future. Fixes bug
21633 13661; bugfix on 0.0.8pre1.
21635 o Minor bugfixes (path counting):
21636 - When deciding whether the consensus lists any exit nodes, count
21637 the number listed in the consensus, not the number we have
21638 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
21639 - When deciding whether we have any exit nodes, only examine
21640 ExitNodes when the ExitNodes option is actually set. Fixes part of
21641 bug 14918; bugfix on 0.2.6.2-alpha.
21642 - Get rid of redundant and possibly scary warnings that we are
21643 missing directory information while we bootstrap. Fixes part of
21644 bug 14918; bugfix on 0.2.6.2-alpha.
21646 o Minor bugfixes (portability):
21647 - Fix the ioctl()-based network interface lookup code so that it
21648 will work on systems that have variable-length struct ifreq, for
21650 - Fix scheduler compilation on targets where char is unsigned. Fixes
21651 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
21653 o Minor bugfixes (sandbox):
21654 - Allow glibc fatal errors to be sent to stderr before Tor exits.
21655 Previously, glibc would try to write them to /dev/tty, and the
21656 sandbox would trap the call and make Tor exit prematurely. Fixes
21657 bug 14759; bugfix on 0.2.5.1-alpha.
21659 o Minor bugfixes (shutdown):
21660 - When shutting down, always call event_del() on lingering read or
21661 write events before freeing them. Otherwise, we risk double-frees
21662 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
21665 o Minor bugfixes (small memory leaks):
21666 - Avoid leaking memory when using IPv6 virtual address mappings.
21667 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
21670 o Minor bugfixes (statistics):
21671 - Increase period over which bandwidth observations are aggregated
21672 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21674 o Minor bugfixes (systemd support):
21675 - Fix detection and operation of systemd watchdog. Fixes part of bug
21676 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
21677 - Run correctly under systemd with the RunAsDaemon option set. Fixes
21678 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
21679 - Inform the systemd supervisor about more changes in the Tor
21680 process status. Implements part of ticket 14141. Patch from
21682 - Cause the "--disable-systemd" option to actually disable systemd
21683 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
21686 o Minor bugfixes (TLS):
21687 - Check more thoroughly throughout the TLS code for possible
21688 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
21690 o Minor bugfixes (transparent proxy):
21691 - Use getsockname, not getsockopt, to retrieve the address for a
21692 TPROXY-redirected connection. Fixes bug 13796; bugfix
21695 o Code simplification and refactoring:
21696 - Move fields related to isolating and configuring client ports into
21697 a shared structure. Previously, they were duplicated across
21698 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
21699 to copy them correctly had been the cause of at least one bug in
21700 the past. Closes ticket 8546.
21701 - Refactor the get_interface_addresses_raw() doom-function into
21702 multiple smaller and simpler subfunctions. Cover the resulting
21703 subfunctions with unit-tests. Fixes a significant portion of
21705 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
21706 only for version <= 0.2.2.24 which is now deprecated. Closes
21708 - Remove a test for a long-defunct broken version-one
21712 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
21713 for writing the OpenBSD-specific tips. Resolves ticket 13702.
21714 - Make the tor-resolve documentation match its help string and its
21715 options. Resolves part of ticket 14325.
21716 - Log a more useful error message from tor-resolve when failing to
21717 look up a hidden service address. Resolves part of ticket 14325.
21719 o Downgraded warnings:
21720 - Don't warn when we've attempted to contact a relay using the wrong
21721 ntor onion key. Closes ticket 9635.
21723 o Removed features:
21724 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
21725 longer silently accepted as an alias for "ExitNodes".
21726 - The --enable-mempool and --enable-buf-freelists options, which
21727 were originally created to work around bad malloc implementations,
21728 no longer exist. They were off-by-default in 0.2.5. Closes
21732 - Make the checkdir/perms test complete successfully even if the
21733 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
21734 - Test that tor does not fail when key files are zero-length. Check
21735 that tor generates new keys, and overwrites the empty key files.
21736 - Test that tor generates new keys when keys are missing
21737 (existing behavior).
21738 - Test that tor does not overwrite key files that already contain
21739 data (existing behavior). Tests bug 13111. Patch by "teor".
21740 - New "make test-stem" target to run stem integration tests.
21741 Requires that the "STEM_SOURCE_DIR" environment variable be set.
21742 Closes ticket 14107.
21743 - Make the test_cmdline_args.py script work correctly on Windows.
21744 Patch from Gisle Vanem.
21745 - Move the slower unit tests into a new "./src/test/test-slow"
21746 binary that can be run independently of the other tests. Closes
21748 - Avoid undefined behavior when sampling huge values from the
21749 Laplace distribution. This made unittests fail on Raspberry Pi.
21750 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
21753 Changes in version 0.2.6.2-alpha - 2014-12-31
21754 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
21755 It introduces a major new backend for deciding when to send cells on
21756 channels, which should lead down the road to big performance
21757 increases. It contains security and statistics features for better
21758 work on hidden services, and numerous bugfixes.
21760 This release contains many new unit tests, along with major
21761 performance improvements for running testing networks using Chutney.
21762 Thanks to a series of patches contributed by "teor", testing networks
21763 should now bootstrap in seconds, rather than minutes.
21765 o Major features (relay, infrastructure):
21766 - Complete revision of the code that relays use to decide which cell
21767 to send next. Formerly, we selected the best circuit to write on
21768 each channel, but we didn't select among channels in any
21769 sophisticated way. Now, we choose the best circuits globally from
21770 among those whose channels are ready to deliver traffic.
21772 This patch implements a new inter-cmux comparison API, a global
21773 high/low watermark mechanism and a global scheduler loop for
21774 transmission prioritization across all channels as well as among
21775 circuits on one channel. This schedule is currently tuned to
21776 (tolerantly) avoid making changes in network performance, but it
21777 should form the basis for major circuit performance increases in
21778 the future. Code by Andrea; tuning by Rob Jansen; implements
21781 o Major features (hidden services):
21782 - Make HS port scanning more difficult by immediately closing the
21783 circuit when a user attempts to connect to a nonexistent port.
21784 Closes ticket 13667.
21785 - Add a HiddenServiceStatistics option that allows Tor relays to
21786 gather and publish statistics about the overall size and volume of
21787 hidden service usage. Specifically, when this option is turned on,
21788 an HSDir will publish an approximate number of hidden services
21789 that have published descriptors to it the past 24 hours. Also, if
21790 a relay has acted as a hidden service rendezvous point, it will
21791 publish the approximate amount of rendezvous cells it has relayed
21792 the past 24 hours. The statistics themselves are obfuscated so
21793 that the exact values cannot be derived. For more details see
21794 proposal 238, "Better hidden service stats from Tor relays". This
21795 feature is currently disabled by default. Implements feature 13192.
21797 o Major bugfixes (client, automap):
21798 - Repair automapping with IPv6 addresses. This automapping should
21799 have worked previously, but one piece of debugging code that we
21800 inserted to detect a regression actually caused the regression to
21801 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
21802 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
21805 o Major bugfixes (hidden services):
21806 - When closing an introduction circuit that was opened in parallel
21807 with others, don't mark the introduction point as unreachable.
21808 Previously, the first successful connection to an introduction
21809 point would make the other introduction points get marked as
21810 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
21812 o Directory authority changes:
21813 - Remove turtles as a directory authority.
21814 - Add longclaw as a new (v3) directory authority. This implements
21815 ticket 13296. This keeps the directory authority count at 9.
21817 o Major removed features:
21818 - Tor clients no longer support connecting to hidden services
21819 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
21820 option has been removed. (There shouldn't be any hidden services
21821 running these versions on the network.) Closes ticket 7803.
21823 o Minor features (client):
21824 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
21825 is enabled, reject requests with IP addresses as hostnames.
21826 Resolves ticket 13315.
21828 o Minor features (controller):
21829 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
21830 write an unscheduled heartbeat message to the log. Implements
21833 o Minor features (geoip):
21834 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
21837 o Minor features (hidden services):
21838 - When re-enabling the network, don't try to build introduction
21839 circuits until we have successfully built a circuit. This makes
21840 hidden services come up faster when the network is re-enabled.
21841 Patch from "akwizgran". Closes ticket 13447.
21842 - When we fail to retrieve a hidden service descriptor, send the
21843 controller an "HS_DESC FAILED" controller event. Implements
21845 - New HiddenServiceDirGroupReadable option to cause hidden service
21846 directories and hostname files to be created group-readable. Patch
21847 from "anon", David Stainton, and "meejah". Closes ticket 11291.
21849 o Minor features (systemd):
21850 - Where supported, when running with systemd, report successful
21851 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
21852 - When running with systemd, support systemd watchdog messages. Part
21853 of ticket 11016. Patch by Michael Scherer.
21855 o Minor features (transparent proxy):
21856 - Update the transparent proxy option checks to allow for both ipfw
21857 and pf on OS X. Closes ticket 14002.
21858 - Use the correct option when using IPv6 with transparent proxy
21859 support on Linux. Resolves 13808. Patch by Francisco Blas
21862 o Minor bugfixes (preventative security, C safety):
21863 - When reading a hexadecimal, base-32, or base-64 encoded value from
21864 a string, always overwrite the whole output buffer. This prevents
21865 some bugs where we would look at (but fortunately, not reveal)
21866 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21868 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
21869 just the part that's used. This makes it harder for data leak bugs
21870 to occur in the event of other programming failures. Resolves
21873 o Minor bugfixes (client, microdescriptors):
21874 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
21875 computing which microdescriptors to download. This keeps us from
21876 erroneous download behavior if two microdescriptor digests ever
21877 have the same first 160 bits. Fixes part of bug 13399; bugfix
21879 - Reset a router's status if its microdescriptor digest changes,
21880 even if the first 160 bits remain the same. Fixes part of bug
21881 13399; bugfix on 0.2.3.1-alpha.
21883 o Minor bugfixes (compilation):
21884 - Silence clang warnings under --enable-expensive-hardening,
21885 including implicit truncation of 64 bit values to 32 bit, const
21886 char assignment to self, tautological compare, and additional
21887 parentheses around equality tests. Fixes bug 13577; bugfix
21889 - Fix a clang warning about checking whether an address in the
21890 middle of a structure is NULL. Fixes bug 14001; bugfix
21893 o Minor bugfixes (hidden services):
21894 - Correctly send a controller event when we find that a rendezvous
21895 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
21896 - Pre-check directory permissions for new hidden-services to avoid
21897 at least one case of "Bug: Acting on config options left us in a
21898 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
21899 - When adding a new hidden service (for example, via SETCONF), Tor
21900 no longer congratulates the user for running a relay. Fixes bug
21901 13941; bugfix on 0.2.6.1-alpha.
21902 - When fetching hidden service descriptors, we now check not only
21903 for whether we got the hidden service we had in mind, but also
21904 whether we got the particular descriptors we wanted. This prevents
21905 a class of inefficient but annoying DoS attacks by hidden service
21906 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
21909 o Minor bugfixes (Linux seccomp2 sandbox):
21910 - Make transparent proxy support work along with the seccomp2
21911 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
21912 by Francisco Blas Izquierdo Riera.
21913 - Fix a memory leak in tor-resolve when running with the sandbox
21914 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
21916 o Minor bugfixes (logging):
21917 - Downgrade warnings about RSA signature failures to info log level.
21918 Emit a warning when an extra info document is found incompatible
21919 with a corresponding router descriptor. Fixes bug 9812; bugfix
21921 - Make connection_ap_handshake_attach_circuit() log the circuit ID
21922 correctly. Fixes bug 13701; bugfix on 0.0.6.
21924 o Minor bugfixes (misc):
21925 - Stop allowing invalid address patterns like "*/24" that contain
21926 both a wildcard address and a bit prefix length. This affects all
21927 our address-range parsing code. Fixes bug 7484; bugfix
21930 o Minor bugfixes (testing networks, fast startup):
21931 - Allow Tor to build circuits using a consensus with no exits. If
21932 the consensus has no exits (typical of a bootstrapping test
21933 network), allow Tor to build circuits once enough descriptors have
21934 been downloaded. This assists in bootstrapping a testing Tor
21935 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
21937 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
21938 header to directory servers. This allows us to obtain consensuses
21939 promptly when the consensus interval is very short. This assists
21940 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
21941 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
21942 - Stop assuming that private addresses are local when checking
21943 reachability in a TestingTorNetwork. Instead, when testing, assume
21944 all OR connections are remote. (This is necessary due to many test
21945 scenarios running all relays on localhost.) This assists in
21946 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
21947 0.1.0.1-rc. Patch by "teor".
21948 - Avoid building exit circuits from a consensus with no exits. Now
21949 thanks to our fix for 13718, we accept a no-exit network as not
21950 wholly lost, but we need to remember not to try to build exit
21951 circuits on it. Closes ticket 13814; patch by "teor".
21952 - Stop requiring exits to have non-zero bandwithcapacity in a
21953 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
21954 ignore exit bandwidthcapacity. This assists in bootstrapping a
21955 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
21956 on 0.2.0.3-alpha. Patch by "teor".
21957 - Add "internal" to some bootstrap statuses when no exits are
21958 available. If the consensus does not contain Exits, Tor will only
21959 build internal circuits. In this case, relevant statuses will
21960 contain the word "internal" as indicated in the Tor control-
21961 spec.txt. When bootstrap completes, Tor will be ready to build
21962 internal circuits. If a future consensus contains Exits, exit
21963 circuits may become available. Fixes part of bug 13718; bugfix on
21964 0.2.4.10-alpha. Patch by "teor".
21965 - Decrease minimum consensus interval to 10 seconds when
21966 TestingTorNetwork is set, or 5 seconds for the first consensus.
21967 Fix assumptions throughout the code that assume larger intervals.
21968 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
21970 - Avoid excluding guards from path building in minimal test
21971 networks, when we're in a test network and excluding guards would
21972 exclude all relays. This typically occurs in incredibly small tor
21973 networks, and those using "TestingAuthVoteGuard *". Fixes part of
21974 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
21976 o Code simplification and refactoring:
21977 - Stop using can_complete_circuits as a global variable; access it
21978 with a function instead.
21979 - Avoid using operators directly as macro arguments: this lets us
21980 apply coccinelle transformations to our codebase more directly.
21981 Closes ticket 13172.
21982 - Combine the functions used to parse ClientTransportPlugin and
21983 ServerTransportPlugin into a single function. Closes ticket 6456.
21984 - Add inline functions and convenience macros for inspecting channel
21985 state. Refactor the code to use convenience macros instead of
21986 checking channel state directly. Fixes issue 7356.
21987 - Document all members of was_router_added_t and rename
21988 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
21989 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
21990 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
21991 constant instead of hardcoded value. Fixes issue 13840.
21992 - Refactor our generic strmap and digestmap types into a single
21993 implementation, so that we can add a new digest256map
21997 - Document the bridge-authority-only 'networkstatus-bridges' file.
21998 Closes ticket 13713; patch from "tom".
21999 - Fix typo in PredictedPortsRelevanceTime option description in
22000 manpage. Resolves issue 13707.
22001 - Stop suggesting that users specify relays by nickname: it isn't a
22002 good idea. Also, properly cross-reference how to specify relays in
22003 all parts of manual documenting options that take a list of
22004 relays. Closes ticket 13381.
22005 - Clarify the HiddenServiceDir option description in manpage to make
22006 it clear that relative paths are taken with respect to the current
22007 working directory. Also clarify that this behavior is not
22008 guaranteed to remain indefinitely. Fixes issue 13913.
22011 - New tests for many parts of channel, relay, and circuitmux
22012 functionality. Code by Andrea; part of 9262.
22013 - New tests for parse_transport_line(). Part of ticket 6456.
22014 - In the unit tests, use chgrp() to change the group of the unit
22015 test temporary directory to the current user, so that the sticky
22016 bit doesn't interfere with tests that check directory groups.
22018 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
22022 Changes in version 0.2.6.1-alpha - 2014-10-30
22023 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
22024 includes numerous code cleanups and new tests, and fixes a large
22025 number of annoying bugs. Out-of-memory conditions are handled better
22026 than in 0.2.5, pluggable transports have improved proxy support, and
22027 clients now use optimistic data for contacting hidden services. Also,
22028 we are now more robust to changes in what we consider a parseable
22029 directory object, so that tightening restrictions does not have a risk
22030 of introducing infinite download loops.
22032 This is the first alpha release in a new series, so expect there to be
22033 bugs. Users who would rather test out a more stable branch should stay
22034 with 0.2.5.x for now.
22036 o New compiler and system requirements:
22037 - Tor 0.2.6.x requires that your compiler support more of the C99
22038 language standard than before. The 'configure' script now detects
22039 whether your compiler supports C99 mid-block declarations and
22040 designated initializers. If it does not, Tor will not compile.
22042 We may revisit this requirement if it turns out that a significant
22043 number of people need to build Tor with compilers that don't
22044 bother implementing a 15-year-old standard. Closes ticket 13233.
22045 - Tor no longer supports systems without threading support. When we
22046 began working on Tor, there were several systems that didn't have
22047 threads, or where the thread support wasn't able to run the
22048 threads of a single process on multiple CPUs. That no longer
22049 holds: every system where Tor needs to run well now has threading
22050 support. Resolves ticket 12439.
22052 o Removed platform support:
22053 - We no longer include special code to build on Windows CE; as far
22054 as we know, nobody has used Tor on Windows CE in a very long time.
22055 Closes ticket 11446.
22057 o Major features (bridges):
22058 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
22059 transports if they are configured via the "TOR_PT_PROXY"
22060 environment variable. Implements proposal 232. Resolves
22063 o Major features (client performance, hidden services):
22064 - Allow clients to use optimistic data when connecting to a hidden
22065 service, which should remove a round-trip from hidden service
22066 initialization. See proposal 181 for details. Implements
22069 o Major features (directory system):
22070 - Upon receiving an unparseable directory object, if its digest
22071 matches what we expected, then don't try to download it again.
22072 Previously, when we got a descriptor we didn't like, we would keep
22073 trying to download it over and over. Closes ticket 11243.
22075 o Major features (sample torrc):
22076 - Add a new, infrequently-changed "torrc.minimal". This file is
22077 similar to torrc.sample, but it will change as infrequently as
22078 possible, for the benefit of users whose systems prompt them for
22079 intervention whenever a default configuration file is changed.
22080 Making this change allows us to update torrc.sample to be a more
22081 generally useful "sample torrc".
22083 o Major bugfixes (directory authorities):
22084 - Do not assign the HSDir flag to relays if they are not Valid, or
22085 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
22087 o Major bugfixes (directory bandwidth performance):
22088 - Don't flush the zlib buffer aggressively when compressing
22089 directory information for clients. This should save about 7% of
22090 the bandwidth currently used for compressed descriptors and
22091 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
22093 o Minor features (security, memory wiping):
22094 - Ensure we securely wipe keys from memory after
22095 crypto_digest_get_digest and init_curve25519_keypair_from_file
22096 have finished using them. Resolves ticket 13477.
22098 o Minor features (security, out-of-memory handling):
22099 - When handling an out-of-memory condition, allocate less memory for
22100 temporary data structures. Fixes issue 10115.
22101 - When handling an out-of-memory condition, consider more types of
22102 buffers, including those on directory connections, and zlib
22103 buffers. Resolves ticket 11792.
22106 - When identity keypair is generated for first time, log a
22107 congratulatory message that links to the new relay lifecycle
22108 document. Implements feature 10427.
22110 o Minor features (client):
22111 - Clients are now willing to send optimistic data (before they
22112 receive a 'connected' cell) to relays of any version. (Relays
22113 without support for optimistic data are no longer supported on the
22114 Tor network.) Resolves ticket 13153.
22116 o Minor features (directory authorities):
22117 - Don't list relays with a bandwidth estimate of 0 in the consensus.
22118 Implements a feature proposed during discussion of bug 13000.
22119 - In tor-gencert, report an error if the user provides the same
22120 argument more than once.
22121 - If a directory authority can't find a best consensus method in the
22122 votes that it holds, it now falls back to its favorite consensus
22123 method. Previously, it fell back to method 1. Neither of these is
22124 likely to get enough signatures, but "fall back to favorite"
22125 doesn't require us to maintain support an obsolete consensus
22126 method. Implements part of proposal 215.
22128 o Minor features (logging):
22129 - On Unix-like systems, you can now use named pipes as the target of
22130 the Log option, and other options that try to append to files.
22131 Closes ticket 12061. Patch from "carlo von lynX".
22132 - When opening a log file at startup, send it every log message that
22133 we generated between startup and opening it. Previously, log
22134 messages that were generated before opening the log file were only
22135 logged to stdout. Closes ticket 6938.
22136 - Add a TruncateLogFile option to overwrite logs instead of
22137 appending to them. Closes ticket 5583.
22139 o Minor features (portability, Solaris):
22140 - Threads are no longer disabled by default on Solaris; we believe
22141 that the versions of Solaris with broken threading support are all
22142 obsolete by now. Resolves ticket 9495.
22144 o Minor features (relay):
22145 - Re-check our address after we detect a changed IP address from
22146 getsockname(). This ensures that the controller command "GETINFO
22147 address" will report the correct value. Resolves ticket 11582.
22149 - A new AccountingRule option lets Relays set whether they'd like
22150 AccountingMax to be applied separately to inbound and outbound
22151 traffic, or applied to the sum of inbound and outbound traffic.
22152 Resolves ticket 961. Patch by "chobe".
22154 o Minor features (testing networks):
22155 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
22156 the "Exit" flag regardless of their uptime, bandwidth, or exit
22157 policy. TestingTorNetwork must be set for this option to have any
22158 effect. Previously, authorities would take up to 35 minutes to
22159 give nodes the Exit flag in a test network. Partially implements
22162 o Minor features (validation):
22163 - Check all date/time values passed to tor_timegm and
22164 parse_rfc1123_time for validity, taking leap years into account.
22165 Improves HTTP header validation. Implemented with bug 13476.
22166 - In correct_tm(), limit the range of values returned by system
22167 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
22168 This means we don't have to deal with negative or too large dates,
22169 even if a clock is wrong. Otherwise we might fail to read a file
22170 written by us which includes such a date. Fixes bug 13476.
22172 o Minor bugfixes (bridge clients):
22173 - When configured to use a bridge without an identity digest (not
22174 recommended), avoid launching an extra channel to it when
22175 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
22177 o Minor bugfixes (bridges):
22178 - When DisableNetwork is set, do not launch pluggable transport
22179 plugins, and if any are running, terminate them. Fixes bug 13213;
22180 bugfix on 0.2.3.6-alpha.
22182 o Minor bugfixes (C correctness):
22183 - Fix several instances of possible integer overflow/underflow/NaN.
22184 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
22186 - In circuit_build_times_calculate_timeout() in circuitstats.c,
22187 avoid dividing by zero in the pareto calculations. This traps
22188 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
22190 - Fix an integer overflow in format_time_interval(). Fixes bug
22191 13393; bugfix on 0.2.0.10-alpha.
22192 - Set the correct day of year value when the system's localtime(_r)
22193 or gmtime(_r) functions fail to set struct tm. Not externally
22194 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
22195 - Avoid unlikely signed integer overflow in tor_timegm on systems
22196 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
22198 o Minor bugfixes (client):
22199 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
22200 BadExit flag are not considered worthy candidates. Fixes bug
22201 13066; bugfix on 0.1.2.3-alpha.
22202 - Use the consensus schedule for downloading consensuses, and not
22203 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
22204 - Handle unsupported or malformed SOCKS5 requests properly by
22205 responding with the appropriate error message before closing the
22206 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
22208 o Minor bugfixes (client, torrc):
22209 - Stop modifying the value of our DirReqStatistics torrc option just
22210 because we're not a bridge or relay. This bug was causing Tor
22211 Browser users to write "DirReqStatistics 0" in their torrc files
22212 as if they had chosen to change the config. Fixes bug 4244; bugfix
22214 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
22215 that our options have changed every time we SIGHUP. Fixes bug
22216 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
22218 o Minor bugfixes (controller):
22219 - Return an error when the second or later arguments of the
22220 "setevents" controller command are invalid events. Previously we
22221 would return success while silently skipping invalid events. Fixes
22222 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
22224 o Minor bugfixes (directory system):
22225 - Always believe that v3 directory authorities serve extra-info
22226 documents, whether they advertise "caches-extra-info" or not.
22227 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
22228 - When running as a v3 directory authority, advertise that you serve
22229 extra-info documents so that clients who want them can find them
22230 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
22231 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
22232 Previously, directories offering BRIDGE_DIRINFO and some other
22233 flag (i.e. microdescriptors or extrainfo) would be ignored when
22234 looking for bridges. Partially fixes bug 13163; bugfix
22237 o Minor bugfixes (networking):
22238 - Check for orconns and use connection_or_close_for_error() rather
22239 than connection_mark_for_close() directly in the getsockopt()
22240 failure case of connection_handle_write_impl(). Fixes bug 11302;
22241 bugfix on 0.2.4.4-alpha.
22243 o Minor bugfixes (relay):
22244 - When generating our family list, remove spaces from around the
22245 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
22246 - If our previous bandwidth estimate was 0 bytes, allow publishing a
22247 new relay descriptor immediately. Fixes bug 13000; bugfix
22250 o Minor bugfixes (testing networks):
22251 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
22252 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
22253 - Stop using the default authorities in networks which provide both
22254 AlternateDirAuthority and AlternateBridgeAuthority. Partially
22255 fixes bug 13163; bugfix on 0.2.0.13-alpha.
22257 o Minor bugfixes (testing):
22258 - Stop spawn test failures due to a race condition between the
22259 SIGCHLD handler updating the process status, and the test reading
22260 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
22262 o Minor bugfixes (testing, Windows):
22263 - Avoid passing an extra backslash when creating a temporary
22264 directory for running the unit tests on Windows. Fixes bug 12392;
22265 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
22267 o Minor bugfixes (windows):
22268 - Remove code to special-case handling of NTE_BAD_KEYSET when
22269 acquiring windows CryptoAPI context. This error can't actually
22270 occur for the parameters we're providing. Fixes bug 10816; bugfix
22273 o Minor bugfixes (zlib):
22274 - Avoid truncating a zlib stream when trying to finalize it with an
22275 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
22278 - Allow our configure script to build correctly with autoconf 2.62
22279 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
22280 - Improve the error message from ./configure to make it clear that
22281 when asciidoc has not been found, the user will have to either add
22282 --disable-asciidoc argument or install asciidoc. Resolves
22285 o Code simplification and refactoring:
22286 - Change the entry_is_live() function to take named bitfield
22287 elements instead of an unnamed list of booleans. Closes
22289 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
22290 Resolves ticket 12205.
22291 - Use calloc and reallocarray functions instead of multiply-
22292 then-malloc. This makes it less likely for us to fall victim to an
22293 integer overflow attack when allocating. Resolves ticket 12855.
22294 - Use the standard macro name SIZE_MAX, instead of our
22296 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
22297 functions which take them as arguments. Replace 0 with NO_DIRINFO
22298 in a function call for clarity. Seeks to prevent future issues
22300 - Avoid 4 null pointer errors under clang static analysis by using
22301 tor_assert() to prove that the pointers aren't null. Fixes
22303 - Rework the API of policies_parse_exit_policy() to use a bitmask to
22304 represent parsing options, instead of a confusing mess of
22305 booleans. Resolves ticket 8197.
22306 - Introduce a helper function to parse ExitPolicy in
22307 or_options_t structure.
22310 - Add a doc/TUNING document with tips for handling large numbers of
22311 TCP connections when running busy Tor relay. Update the warning
22312 message to point to this file when running out of sockets
22313 operating system is allowing to use simultaneously. Resolves
22316 o Removed features:
22317 - We no longer remind the user about configuration options that have
22318 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
22319 - Remove our old, non-weighted bandwidth-based node selection code.
22320 Previously, we used it as a fallback when we couldn't perform
22321 weighted bandwidth-based node selection. But that would only
22322 happen in the cases where we had no consensus, or when we had a
22323 consensus generated by buggy or ancient directory authorities. In
22324 either case, it's better to use the more modern, better maintained
22325 algorithm, with reasonable defaults for the weights. Closes
22327 - Remove the --disable-curve25519 configure option. Relays and
22328 clients now are required to support curve25519 and the
22330 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
22331 used to be deprecated synonyms for "StrictNodes", are now marked
22332 obsolete. Resolves ticket 12226.
22333 - Clients don't understand the BadDirectory flag in the consensus
22334 anymore, and ignore it.
22337 - Refactor the function that chooses guard nodes so that it can more
22338 easily be tested; write some tests for it.
22339 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
22340 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
22341 - Create unit tests for format_time_interval(). With bug 13393.
22342 - Add unit tests for tor_timegm signed overflow, tor_timegm and
22343 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
22344 tests (visible) fixes in bug 13476.
22345 - Add a "coverage-html" make target to generate HTML-visualized
22346 coverage results when building with --enable-coverage. (Requires
22347 lcov.) Patch from Kevin Murray.
22348 - Enable the backtrace handler (where supported) when running the
22350 - Revise all unit tests that used the legacy test_* macros to
22351 instead use the recommended tt_* macros. This patch was generated
22352 with coccinelle, to avoid manual errors. Closes ticket 13119.
22354 o Distribution (systemd):
22355 - systemd unit file: only allow tor to write to /var/lib/tor and
22356 /var/log/tor. The rest of the filesystem is accessible for reading
22357 only. Patch by intrigeri; resolves ticket 12751.
22358 - systemd unit file: ensure that the process and all its children
22359 can never gain new privileges. Patch by intrigeri; resolves
22361 - systemd unit file: set up /var/run/tor as writable for the Tor
22362 service. Patch by intrigeri; resolves ticket 13196.
22364 o Removed features (directory authorities):
22365 - Remove code that prevented authorities from listing Tor relays
22366 affected by CVE-2011-2769 as guards. These relays are already
22367 rejected altogether due to the minimum version requirement of
22368 0.2.3.16-alpha. Closes ticket 13152.
22369 - The "AuthDirRejectUnlisted" option no longer has any effect, as
22370 the fingerprints file (approved-routers) has been deprecated.
22371 - Directory authorities do not support being Naming dirauths anymore.
22372 The "NamingAuthoritativeDir" config option is now obsolete.
22373 - Directory authorities do not support giving out the BadDirectory
22375 - Directory authorities no longer advertise or support consensus
22376 methods 1 through 12 inclusive. These consensus methods were
22377 obsolete and/or insecure: maintaining the ability to support them
22378 served no good purpose. Implements part of proposal 215; closes
22381 o Testing (test-network.sh):
22382 - Stop using "echo -n", as some shells' built-in echo doesn't
22383 support "-n". Instead, use "/bin/echo -n". Partially fixes
22385 - Stop an apparent test-network hang when used with make -j2. Fixes
22387 - Add a --delay option to test-network.sh, which configures the
22388 delay before the chutney network tests for data transmission.
22389 Partially implements ticket 13161.
22392 Changes in version 0.2.5.10 - 2014-10-24
22393 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
22395 It adds several new security features, including improved
22396 denial-of-service resistance for relays, new compiler hardening
22397 options, and a system-call sandbox for hardened installations on Linux
22398 (requires seccomp2). The controller protocol has several new features,
22399 resolving IPv6 addresses should work better than before, and relays
22400 should be a little more CPU-efficient. We've added support for more
22401 OpenBSD and FreeBSD transparent proxy types. We've improved the build
22402 system and testing infrastructure to allow unit testing of more parts
22403 of the Tor codebase. Finally, we've addressed several nagging pluggable
22404 transport usability issues, and included numerous other small bugfixes
22405 and features mentioned below.
22407 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
22408 have accumulated many known flaws; everyone should upgrade.
22410 o Deprecated versions:
22411 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
22412 attention for some while.
22415 Changes in version 0.2.5.9-rc - 2014-10-20
22416 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
22417 series. It disables SSL3 in response to the recent "POODLE" attack
22418 (even though POODLE does not affect Tor). It also works around a crash
22419 bug caused by some operating systems' response to the "POODLE" attack
22420 (which does affect Tor). It also contains a few miscellaneous fixes.
22422 o Major security fixes:
22423 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22424 today support TLS 1.0 or later, so we can safely turn off support
22425 for this old (and insecure) protocol. Fixes bug 13426.
22427 o Major bugfixes (openssl bug workaround):
22428 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22429 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22430 13471. This is a workaround for an OpenSSL bug.
22433 - Disable the sandbox name resolver cache when running tor-resolve:
22434 tor-resolve doesn't use the sandbox code, and turning it on was
22435 breaking attempts to do tor-resolve on a non-default server on
22436 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
22438 o Compilation fixes:
22439 - Build and run correctly on systems like OpenBSD-current that have
22440 patched OpenSSL to remove get_cipher_by_char and/or its
22441 implementations. Fixes issue 13325.
22443 o Downgraded warnings:
22444 - Downgrade the severity of the 'unexpected sendme cell from client'
22445 from 'warn' to 'protocol warning'. Closes ticket 8093.
22448 Changes in version 0.2.4.25 - 2014-10-20
22449 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
22450 (even though POODLE does not affect Tor). It also works around a crash
22451 bug caused by some operating systems' response to the "POODLE" attack
22452 (which does affect Tor).
22454 o Major security fixes (also in 0.2.5.9-rc):
22455 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22456 today support TLS 1.0 or later, so we can safely turn off support
22457 for this old (and insecure) protocol. Fixes bug 13426.
22459 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
22460 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22461 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22462 13471. This is a workaround for an OpenSSL bug.
22465 Changes in version 0.2.5.8-rc - 2014-09-22
22466 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
22467 series. It fixes a bug that affects consistency and speed when
22468 connecting to hidden services, and it updates the location of one of
22469 the directory authorities.
22472 - Clients now send the correct address for their chosen rendezvous
22473 point when trying to access a hidden service. They used to send
22474 the wrong address, which would still work some of the time because
22475 they also sent the identity digest of the rendezvous point, and if
22476 the hidden service happened to try connecting to the rendezvous
22477 point from a relay that already had a connection open to it,
22478 the relay would reuse that connection. Now connections to hidden
22479 services should be more robust and faster. Also, this bug meant
22480 that clients were leaking to the hidden service whether they were
22481 on a little-endian (common) or big-endian (rare) system, which for
22482 some users might have reduced their anonymity. Fixes bug 13151;
22483 bugfix on 0.2.1.5-alpha.
22485 o Directory authority changes:
22486 - Change IP address for gabelmoo (v3 directory authority).
22489 Changes in version 0.2.4.24 - 2014-09-22
22490 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
22491 connecting to hidden services, and it updates the location of one of
22492 the directory authorities.
22495 - Clients now send the correct address for their chosen rendezvous
22496 point when trying to access a hidden service. They used to send
22497 the wrong address, which would still work some of the time because
22498 they also sent the identity digest of the rendezvous point, and if
22499 the hidden service happened to try connecting to the rendezvous
22500 point from a relay that already had a connection open to it,
22501 the relay would reuse that connection. Now connections to hidden
22502 services should be more robust and faster. Also, this bug meant
22503 that clients were leaking to the hidden service whether they were
22504 on a little-endian (common) or big-endian (rare) system, which for
22505 some users might have reduced their anonymity. Fixes bug 13151;
22506 bugfix on 0.2.1.5-alpha.
22508 o Directory authority changes:
22509 - Change IP address for gabelmoo (v3 directory authority).
22511 o Minor features (geoip):
22512 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22516 Changes in version 0.2.5.7-rc - 2014-09-11
22517 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
22518 release series, and some long-standing bugs related to ORPort reachability
22519 testing and failure to send CREATE cells. It is the first release
22520 candidate for the Tor 0.2.5.x series.
22522 o Major bugfixes (client, startup):
22523 - Start making circuits as soon as DisabledNetwork is turned off.
22524 When Tor started with DisabledNetwork set, it would correctly
22525 conclude that it shouldn't build circuits, but it would mistakenly
22526 cache this conclusion, and continue believing it even when
22527 DisableNetwork is set to 0. Fixes the bug introduced by the fix
22528 for bug 11200; bugfix on 0.2.5.4-alpha.
22529 - Resume expanding abbreviations for command-line options. The fix
22530 for bug 4647 accidentally removed our hack from bug 586 that
22531 rewrote HashedControlPassword to __HashedControlSessionPassword
22532 when it appears on the commandline (which allowed the user to set
22533 her own HashedControlPassword in the torrc file while the
22534 controller generates a fresh session password for each run). Fixes
22535 bug 12948; bugfix on 0.2.5.1-alpha.
22536 - Warn about attempts to run hidden services and relays in the same
22537 process: that's probably not a good idea. Closes ticket 12908.
22539 o Major bugfixes (relay):
22540 - Avoid queuing or sending destroy cells for circuit ID zero when we
22541 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
22542 Found and fixed by "cypherpunks".
22543 - Fix ORPort reachability detection on relays running behind a
22544 proxy, by correctly updating the "local" mark on the controlling
22545 channel when changing the address of an or_connection_t after the
22546 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
22548 o Minor features (bridge):
22549 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
22550 cookie file for the ExtORPort g+r by default.
22552 o Minor features (geoip):
22553 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22556 o Minor bugfixes (logging):
22557 - Reduce the log severity of the "Pluggable transport proxy does not
22558 provide any needed transports and will not be launched." message,
22559 since Tor Browser includes several ClientTransportPlugin lines in
22560 its torrc-defaults file, leading every Tor Browser user who looks
22561 at her logs to see these notices and wonder if they're dangerous.
22562 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
22563 - Downgrade "Unexpected onionskin length after decryption" warning
22564 to a protocol-warn, since there's nothing relay operators can do
22565 about a client that sends them a malformed create cell. Resolves
22566 bug 12996; bugfix on 0.0.6rc1.
22567 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
22568 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
22569 - When logging information about an EXTEND2 or EXTENDED2 cell, log
22570 their names correctly. Fixes part of bug 12700; bugfix
22572 - When logging information about a relay cell whose command we don't
22573 recognize, log its command as an integer. Fixes part of bug 12700;
22574 bugfix on 0.2.1.10-alpha.
22575 - Escape all strings from the directory connection before logging
22576 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
22578 o Minor bugfixes (controller):
22579 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
22580 bug 12864; bugfix on 0.2.5.1-alpha.
22581 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
22582 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
22585 o Minor bugfixes (compilation):
22586 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
22587 bugfix on 0.2.5.5-alpha.
22588 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
22589 0.2.5.1-alpha. Patch from "NewEraCracker".
22590 - In routerlist_assert_ok(), don't take the address of a
22591 routerinfo's cache_info member unless that routerinfo is non-NULL.
22592 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
22593 - Fix a large number of false positive warnings from the clang
22594 analyzer static analysis tool. This should make real warnings
22595 easier for clang analyzer to find. Patch from "teor". Closes
22598 o Distribution (systemd):
22599 - Verify configuration file via ExecStartPre in the systemd unit
22600 file. Patch from intrigeri; resolves ticket 12730.
22601 - Explicitly disable RunAsDaemon in the systemd unit file. Our
22602 current systemd unit uses "Type = simple", so systemd does not
22603 expect tor to fork. If the user has "RunAsDaemon 1" in their
22604 torrc, then things won't work as expected. This is e.g. the case
22605 on Debian (and derivatives), since there we pass "--defaults-torrc
22606 /usr/share/tor/tor-service-defaults-torrc" (that contains
22607 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
22611 - Adjust the URLs in the README to refer to the new locations of
22612 several documents on the website. Fixes bug 12830. Patch from
22614 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
22618 Changes in version 0.2.5.6-alpha - 2014-07-28
22619 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
22620 risk from guard rotation, and fixes a variety of other issues to get
22621 us closer to a release candidate.
22623 o Major features (also in 0.2.4.23):
22624 - Make the number of entry guards configurable via a new
22625 NumEntryGuards consensus parameter, and the number of directory
22626 guards configurable via a new NumDirectoryGuards consensus
22627 parameter. Implements ticket 12688.
22629 o Major bugfixes (also in 0.2.4.23):
22630 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22631 implementation that caused incorrect results on 32-bit
22632 implementations when certain malformed inputs were used along with
22633 a small class of private ntor keys. This bug does not currently
22634 appear to allow an attacker to learn private keys or impersonate a
22635 Tor server, but it could provide a means to distinguish 32-bit Tor
22636 implementations from 64-bit Tor implementations. Fixes bug 12694;
22637 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22641 - Perform circuit cleanup operations even when circuit
22642 construction operations are disabled (because the network is
22643 disabled, or because there isn't enough directory information).
22644 Previously, when we were not building predictive circuits, we
22645 were not closing expired circuits either. Fixes bug 8387; bugfix on
22646 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
22647 became more strict about when we have "enough directory information
22648 to build circuits".
22651 - Authorities now assign the Guard flag to the fastest 25% of the
22652 network (it used to be the fastest 50%). Also raise the consensus
22653 weight that guarantees the Guard flag from 250 to 2000. For the
22654 current network, this results in about 1100 guards, down from 2500.
22655 This step paves the way for moving the number of entry guards
22656 down to 1 (proposal 236) while still providing reasonable expected
22657 performance for most users. Implements ticket 12690.
22658 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22660 - Slightly enhance the diagnostic message for bug 12184.
22662 o Minor bugfixes (also in 0.2.4.23):
22663 - Warn and drop the circuit if we receive an inbound 'relay early'
22664 cell. Those used to be normal to receive on hidden service circuits
22665 due to bug 1038, but the buggy Tor versions are long gone from
22666 the network so we can afford to resume watching for them. Resolves
22667 the rest of bug 1038; bugfix on 0.2.1.19.
22668 - Correct a confusing error message when trying to extend a circuit
22669 via the control protocol but we don't know a descriptor or
22670 microdescriptor for one of the specified relays. Fixes bug 12718;
22671 bugfix on 0.2.3.1-alpha.
22674 - Fix compilation when building with bufferevents enabled. (This
22675 configuration is still not expected to work, however.)
22676 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
22677 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
22679 - Compile correctly with builds and forks of OpenSSL (such as
22680 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
22681 0.2.1.1-alpha. Patch from "dhill".
22684 Changes in version 0.2.4.23 - 2014-07-28
22685 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
22686 guard rotation, and also backports several important fixes from the
22687 Tor 0.2.5 alpha release series.
22690 - Clients now look at the "usecreatefast" consensus parameter to
22691 decide whether to use CREATE_FAST or CREATE cells for the first hop
22692 of their circuit. This approach can improve security on connections
22693 where Tor's circuit handshake is stronger than the available TLS
22694 connection security levels, but the tradeoff is more computational
22695 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22696 - Make the number of entry guards configurable via a new
22697 NumEntryGuards consensus parameter, and the number of directory
22698 guards configurable via a new NumDirectoryGuards consensus
22699 parameter. Implements ticket 12688.
22702 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22703 implementation that caused incorrect results on 32-bit
22704 implementations when certain malformed inputs were used along with
22705 a small class of private ntor keys. This bug does not currently
22706 appear to allow an attacker to learn private keys or impersonate a
22707 Tor server, but it could provide a means to distinguish 32-bit Tor
22708 implementations from 64-bit Tor implementations. Fixes bug 12694;
22709 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22713 - Warn and drop the circuit if we receive an inbound 'relay early'
22714 cell. Those used to be normal to receive on hidden service circuits
22715 due to bug 1038, but the buggy Tor versions are long gone from
22716 the network so we can afford to resume watching for them. Resolves
22717 the rest of bug 1038; bugfix on 0.2.1.19.
22718 - Correct a confusing error message when trying to extend a circuit
22719 via the control protocol but we don't know a descriptor or
22720 microdescriptor for one of the specified relays. Fixes bug 12718;
22721 bugfix on 0.2.3.1-alpha.
22722 - Avoid an illegal read from stack when initializing the TLS
22723 module using a version of OpenSSL without all of the ciphers
22724 used by the v2 link handshake. Fixes bug 12227; bugfix on
22725 0.2.4.8-alpha. Found by "starlight".
22728 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22732 Changes in version 0.2.5.5-alpha - 2014-06-18
22733 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
22734 0.2.5.x release series, including a couple of DoS issues, some
22735 performance regressions, a large number of bugs affecting the Linux
22736 seccomp2 sandbox code, and various other bugfixes. It also adds
22737 diagnostic bugfixes for a few tricky issues that we're trying to
22740 o Major features (security, traffic analysis resistance):
22741 - Several major improvements to the algorithm used to decide when to
22742 close TLS connections. Previous versions of Tor closed connections
22743 at a fixed interval after the last time a non-padding cell was
22744 sent over the connection, regardless of the target of the
22745 connection. Now, we randomize the intervals by adding up to 50% of
22746 their base value, we measure the length of time since connection
22747 last had at least one circuit, and we allow connections to known
22748 ORs to remain open a little longer (15 minutes instead of 3
22749 minutes minimum). These changes should improve Tor's resistance
22750 against some kinds of traffic analysis, and lower some overhead
22751 from needlessly closed connections. Fixes ticket 6799.
22752 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
22754 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
22755 - Fix a memory leak that could occur if a microdescriptor parse
22756 fails during the tokenizing step. This bug could enable a memory
22757 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22760 o Major bugfixes (security, directory authorities):
22761 - Directory authorities now include a digest of each relay's
22762 identity key as a part of its microdescriptor.
22764 This is a workaround for bug 11743 (reported by "cypherpunks"),
22765 where Tor clients do not support receiving multiple
22766 microdescriptors with the same SHA256 digest in the same
22767 consensus. When clients receive a consensus like this, they only
22768 use one of the relays. Without this fix, a hostile relay could
22769 selectively disable some client use of target relays by
22770 constructing a router descriptor with a different identity and the
22771 same microdescriptor parameters and getting the authorities to
22772 list it in a microdescriptor consensus. This fix prevents an
22773 attacker from causing a microdescriptor collision, because the
22774 router's identity is not forgeable.
22776 o Major bugfixes (relay):
22777 - Use a direct dirport connection when uploading non-anonymous
22778 descriptors to the directory authorities. Previously, relays would
22779 incorrectly use tunnel connections under a fairly wide variety of
22780 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
22781 - When a circuit accidentally has the same circuit ID for its
22782 forward and reverse direction, correctly detect the direction of
22783 cells using that circuit. Previously, this bug made roughly one
22784 circuit in a million non-functional. Fixes bug 12195; this is a
22785 bugfix on every version of Tor.
22787 o Major bugfixes (client, pluggable transports):
22788 - When managing pluggable transports, use OS notification facilities
22789 to learn if they have crashed, and don't attempt to kill any
22790 process that has already exited. Fixes bug 8746; bugfix
22793 o Minor features (diagnostic):
22794 - When logging a warning because of bug 7164, additionally check the
22795 hash table for consistency (as proposed on ticket 11737). This may
22796 help diagnose bug 7164.
22797 - When we log a heartbeat, log how many one-hop circuits we have
22798 that are at least 30 minutes old, and log status information about
22799 a few of them. This is an attempt to track down bug 8387.
22800 - When encountering an unexpected CR while writing text to a file on
22801 Windows, log the name of the file. Should help diagnosing
22803 - Give more specific warnings when a client notices that an onion
22804 handshake has failed. Fixes ticket 9635.
22805 - Add significant new logging code to attempt to diagnose bug 12184,
22806 where relays seem to run out of available circuit IDs.
22807 - Improve the diagnostic log message for bug 8387 even further to
22808 try to improve our odds of figuring out why one-hop directory
22809 circuits sometimes do not get closed.
22811 o Minor features (security, memory management):
22812 - Memory allocation tricks (mempools and buffer freelists) are now
22813 disabled by default. You can turn them back on with
22814 --enable-mempools and --enable-buf-freelists respectively. We're
22815 disabling these features because malloc performance is good enough
22816 on most platforms, and a similar feature in OpenSSL exacerbated
22817 exploitation of the Heartbleed attack. Resolves ticket 11476.
22819 o Minor features (security):
22820 - Apply the secure SipHash-2-4 function to the hash table mapping
22821 circuit IDs and channels to circuits. We missed this one when we
22822 were converting all the other hash functions to use SipHash back
22823 in 0.2.5.3-alpha. Resolves ticket 11750.
22825 o Minor features (build):
22826 - The configure script has a --disable-seccomp option to turn off
22827 support for libseccomp on systems that have it, in case it (or
22828 Tor's use of it) is broken. Resolves ticket 11628.
22830 o Minor features (other):
22831 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
22834 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
22835 - When running a hidden service, do not allow TunneledDirConns 0;
22836 this will keep the hidden service from running, and also
22837 make it publish its descriptors directly over HTTP. Fixes bug 10849;
22838 bugfix on 0.2.1.1-alpha.
22840 o Minor bugfixes (performance):
22841 - Avoid a bug where every successful connection made us recompute
22842 the flag telling us whether we have sufficient information to
22843 build circuits. Previously, we would forget our cached value
22844 whenever we successfully opened a channel (or marked a router as
22845 running or not running for any other reason), regardless of
22846 whether we had previously believed the router to be running. This
22847 forced us to run an expensive update operation far too often.
22848 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
22849 - Avoid using tor_memeq() for checking relay cell integrity. This
22850 removes a possible performance bottleneck. Fixes part of bug
22851 12169; bugfix on 0.2.1.31.
22853 o Minor bugfixes (compilation):
22854 - Fix compilation of test_status.c when building with MVSC. Bugfix
22855 on 0.2.5.4-alpha. Patch from Gisle Vanem.
22856 - Resolve GCC complaints on OpenBSD about discarding constness in
22857 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
22858 on 0.1.1.23. Patch from Dana Koch.
22859 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
22860 treatment of long and time_t as comparable types. Fixes part of
22861 bug 11633. Patch from Dana Koch.
22862 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
22863 11623; bugfix on 0.2.5.3-alpha.
22864 - When deciding whether to build the 64-bit curve25519
22865 implementation, detect platforms where we can compile 128-bit
22866 arithmetic but cannot link it. Fixes bug 11729; bugfix on
22867 0.2.4.8-alpha. Patch from "conradev".
22868 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
22869 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
22870 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
22873 o Minor bugfixes (Directory server):
22874 - When sending a compressed set of descriptors or microdescriptors,
22875 make sure to finalize the zlib stream. Previously, we would write
22876 all the compressed data, but if the last descriptor we wanted to
22877 send was missing or too old, we would not mark the stream as
22878 finished. This caused problems for decompression tools. Fixes bug
22879 11648; bugfix on 0.1.1.23.
22881 o Minor bugfixes (Linux seccomp sandbox):
22882 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
22883 11622; bugfix on 0.2.5.1-alpha.
22884 - Avoid crashing when re-opening listener ports with the seccomp
22885 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
22886 - Avoid crashing with the seccomp sandbox enabled along with
22887 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
22888 - When we receive a SIGHUP with the sandbox enabled, correctly
22889 support rotating our log files. Fixes bug 12032; bugfix
22891 - Avoid crash when running with sandboxing enabled and
22892 DirReqStatistics not disabled. Fixes bug 12035; bugfix
22894 - Fix a "BUG" warning when trying to write bridge-stats files with
22895 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
22897 - Prevent the sandbox from crashing on startup when run with the
22898 --enable-expensive-hardening configuration option. Fixes bug
22899 11477; bugfix on 0.2.5.4-alpha.
22900 - When running with DirPortFrontPage and sandboxing both enabled,
22901 reload the DirPortFrontPage correctly when restarting. Fixes bug
22902 12028; bugfix on 0.2.5.1-alpha.
22903 - Don't try to enable the sandbox when using the Tor binary to check
22904 its configuration, hash a passphrase, or so on. Doing so was
22905 crashing on startup for some users. Fixes bug 11609; bugfix
22907 - Avoid warnings when running with sandboxing and node statistics
22908 enabled at the same time. Fixes part of 12064; bugfix on
22909 0.2.5.1-alpha. Patch from Michael Wolf.
22910 - Avoid warnings when running with sandboxing enabled at the same
22911 time as cookie authentication, hidden services, or directory
22912 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
22913 - Do not allow options that require calls to exec to be enabled
22914 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
22915 bug 12043; bugfix on 0.2.5.1-alpha.
22916 - Handle failures in getpwnam()/getpwuid() when running with the
22917 User option set and the Linux syscall sandbox enabled. Fixes bug
22918 11946; bugfix on 0.2.5.1-alpha.
22919 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
22920 to avoid calling getaddrinfo() after installing the sandbox
22921 filters. Previously, it preloaded a cache with the IPv4 address
22922 for our hostname, and nothing else. Now, it loads the cache with
22923 every address that it used to initialize the Tor process. Fixes
22924 bug 11970; bugfix on 0.2.5.1-alpha.
22926 o Minor bugfixes (pluggable transports):
22927 - Enable the ExtORPortCookieAuthFile option, to allow changing the
22928 default location of the authentication token for the extended OR
22929 Port as used by sever-side pluggable transports. We had
22930 implemented this option before, but the code to make it settable
22931 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
22932 - Avoid another 60-second delay when starting Tor in a pluggable-
22933 transport-using configuration when we already have cached
22934 descriptors for our bridges. Fixes bug 11965; bugfix
22937 o Minor bugfixes (client):
22938 - Avoid "Tried to open a socket with DisableNetwork set" warnings
22939 when starting a client with bridges configured and DisableNetwork
22940 set. (Tor launcher starts Tor with DisableNetwork set the first
22941 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
22943 o Minor bugfixes (testing):
22944 - The Python parts of the test scripts now work on Python 3 as well
22945 as Python 2, so systems where '/usr/bin/python' is Python 3 will
22946 no longer have the tests break. Fixes bug 11608; bugfix
22948 - When looking for versions of python that we could run the tests
22949 with, check for "python2.7" and "python3.3"; previously we were
22950 only looking for "python", "python2", and "python3". Patch from
22951 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
22952 - Fix all valgrind warnings produced by the unit tests. There were
22953 over a thousand memory leak warnings previously, mostly produced
22954 by forgetting to free things in the unit test code. Fixes bug
22955 11618, bugfixes on many versions of Tor.
22957 o Minor bugfixes (tor-fw-helper):
22958 - Give a correct log message when tor-fw-helper fails to launch.
22959 (Previously, we would say something like "tor-fw-helper sent us a
22960 string we could not parse".) Fixes bug 9781; bugfix
22963 o Minor bugfixes (relay, threading):
22964 - Check return code on spawn_func() in cpuworker code, so that we
22965 don't think we've spawned a nonworking cpuworker and write junk to
22966 it forever. Fix related to bug 4345; bugfix on all released Tor
22967 versions. Found by "skruffy".
22968 - Use a pthread_attr to make sure that spawn_func() cannot return an
22969 error while at the same time launching a thread. Fix related to
22970 bug 4345; bugfix on all released Tor versions. Reported
22973 o Minor bugfixes (relay, oom prevention):
22974 - Correctly detect the total available system memory. We tried to do
22975 this in 0.2.5.4-alpha, but the code was set up to always return an
22976 error value, even on success. Fixes bug 11805; bugfix
22979 o Minor bugfixes (relay, other):
22980 - We now drop CREATE cells for already-existent circuit IDs and for
22981 zero-valued circuit IDs, regardless of other factors that might
22982 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
22984 - Avoid an illegal read from stack when initializing the TLS module
22985 using a version of OpenSSL without all of the ciphers used by the
22986 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
22988 - When rejecting DATA cells for stream_id zero, still count them
22989 against the circuit's deliver window so that we don't fail to send
22990 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
22992 o Minor bugfixes (logging):
22993 - Fix a misformatted log message about delayed directory fetches.
22994 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
22995 - Squelch a spurious LD_BUG message "No origin circuit for
22996 successful SOCKS stream" in certain hidden service failure cases;
23000 - Include a tor.service file in contrib/dist for use with systemd.
23001 Some distributions will be able to use this file unmodified;
23002 others will need to tweak it, or write their own. Patch from Jamie
23003 Nguyen; resolves ticket 8368.
23006 - Clean up several option names in the manpage to match their real
23007 names, add the missing documentation for a couple of testing and
23008 directory authority options, remove the documentation for a
23009 V2-directory fetching option that no longer exists. Resolves
23011 - Correct the documentation so that it lists the correct directory
23012 for the stats files. (They are in a subdirectory called "stats",
23014 - In the manpage, move more authority-only options into the
23015 directory authority section so that operators of regular directory
23016 caches don't get confused.
23019 - The contrib directory has been sorted and tidied. Before, it was
23020 an unsorted dumping ground for useful and not-so-useful things.
23021 Now, it is divided based on functionality, and the items which
23022 seemed to be nonfunctional or useless have been removed. Resolves
23023 ticket 8966; based on patches from "rl1987".
23026 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
23027 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
23028 - The TunnelDirConns and PreferTunnelledDirConns options no longer
23029 exist; tunneled directory connections have been available since
23030 0.1.2.5-alpha, and turning them off is not a good idea. This is a
23031 brute-force fix for 10849, where "TunnelDirConns 0" would break
23035 Changes in version 0.2.4.22 - 2014-05-16
23036 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
23037 alpha release series. These include blocking all authority signing
23038 keys that may have been affected by the OpenSSL "heartbleed" bug,
23039 choosing a far more secure set of TLS ciphersuites by default, closing
23040 a couple of memory leaks that could be used to run a target relay out
23041 of RAM, and several others.
23043 o Major features (security, backport from 0.2.5.4-alpha):
23044 - Block authority signing keys that were used on authorities
23045 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
23046 don't have any evidence that these keys _were_ compromised; we're
23047 doing this to be prudent.) Resolves ticket 11464.
23049 o Major bugfixes (security, OOM):
23050 - Fix a memory leak that could occur if a microdescriptor parse
23051 fails during the tokenizing step. This bug could enable a memory
23052 exhaustion attack by directory servers. Fixes bug 11649; bugfix
23055 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
23056 - The relay ciphersuite list is now generated automatically based on
23057 uniform criteria, and includes all OpenSSL ciphersuites with
23058 acceptable strength and forward secrecy. Previously, we had left
23059 some perfectly fine ciphersuites unsupported due to omission or
23060 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
23061 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
23062 - Relays now trust themselves to have a better view than clients of
23063 which TLS ciphersuites are better than others. (Thanks to bug
23064 11513, the relay list is now well-considered, whereas the client
23065 list has been chosen mainly for anti-fingerprinting purposes.)
23066 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
23067 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
23068 AES128. Resolves ticket 11528.
23069 - Clients now try to advertise the same list of ciphersuites as
23070 Firefox 28. This change enables selection of (fast) GCM
23071 ciphersuites, disables some strange old ciphers, and stops
23072 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
23073 Resolves ticket 11438.
23075 o Minor bugfixes (configuration, security):
23076 - When running a hidden service, do not allow TunneledDirConns 0:
23077 trying to set that option together with a hidden service would
23078 otherwise prevent the hidden service from running, and also make
23079 it publish its descriptors directly over HTTP. Fixes bug 10849;
23080 bugfix on 0.2.1.1-alpha.
23082 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
23083 - Avoid sending a garbage value to the controller when a circuit is
23084 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
23086 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
23087 - Stop leaking memory when we successfully resolve a PTR record.
23088 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
23090 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
23091 - Avoid 60-second delays in the bootstrapping process when Tor is
23092 launching for a second time while using bridges. Fixes bug 9229;
23093 bugfix on 0.2.0.3-alpha.
23095 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
23096 - Give the correct URL in the warning message when trying to run a
23097 relay on an ancient version of Windows. Fixes bug 9393.
23099 o Minor bugfixes (compilation):
23100 - Fix a compilation error when compiling with --disable-curve25519.
23101 Fixes bug 9700; bugfix on 0.2.4.17-rc.
23104 - Downgrade the warning severity for the the "md was still
23105 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
23106 for trying to diagnose this bug, and the current warning in
23107 earlier versions of tor achieves nothing useful. Addresses warning
23110 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
23111 - When we run out of usable circuit IDs on a channel, log only one
23112 warning for the whole channel, and describe how many circuits
23113 there were on the channel. Fixes part of ticket 11553.
23115 o Minor features (security, backport from 0.2.5.4-alpha):
23116 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
23117 leave the default at 8GBytes), to better support Raspberry Pi
23118 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
23120 o Documentation (backport from 0.2.5.4-alpha):
23121 - Correctly document that we search for a system torrc file before
23122 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
23126 Changes in version 0.2.5.4-alpha - 2014-04-25
23127 Tor 0.2.5.4-alpha includes several security and performance
23128 improvements for clients and relays, including blacklisting authority
23129 signing keys that were used while susceptible to the OpenSSL
23130 "heartbleed" bug, fixing two expensive functions on busy relays,
23131 improved TLS ciphersuite preference lists, support for run-time
23132 hardening on compilers that support AddressSanitizer, and more work on
23133 the Linux sandbox code.
23135 There are also several usability fixes for clients (especially clients
23136 that use bridges), two new TransPort protocols supported (one on
23137 OpenBSD, one on FreeBSD), and various other bugfixes.
23139 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
23140 have accumulated many known flaws; everyone should upgrade.
23142 o Major features (security):
23143 - If you don't specify MaxMemInQueues yourself, Tor now tries to
23144 pick a good value based on your total system memory. Previously,
23145 the default was always 8 GB. You can still override the default by
23146 setting MaxMemInQueues yourself. Resolves ticket 11396.
23147 - Block authority signing keys that were used on authorities
23148 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
23149 don't have any evidence that these keys _were_ compromised; we're
23150 doing this to be prudent.) Resolves ticket 11464.
23152 o Major features (relay performance):
23153 - Speed up server-side lookups of rendezvous and introduction point
23154 circuits by using hashtables instead of linear searches. These
23155 functions previously accounted between 3 and 7% of CPU usage on
23156 some busy relays. Resolves ticket 9841.
23157 - Avoid wasting CPU when extending a circuit over a channel that is
23158 nearly out of circuit IDs. Previously, we would do a linear scan
23159 over possible circuit IDs before finding one or deciding that we
23160 had exhausted our possibilities. Now, we try at most 64 random
23161 circuit IDs before deciding that we probably won't succeed. Fixes
23162 a possible root cause of ticket 11553.
23164 o Major features (seccomp2 sandbox, Linux only):
23165 - The seccomp2 sandbox can now run a test network for multiple hours
23166 without crashing. The sandbox is still experimental, and more bugs
23167 will probably turn up. To try it, enable "Sandbox 1" on a Linux
23168 host. Resolves ticket 11351.
23169 - Strengthen sandbox code: the sandbox can now test the arguments
23170 for rename(), and blocks _sysctl() entirely. Resolves another part
23172 - When the sandbox blocks a system call, it now tries to log a stack
23173 trace before exiting. Resolves ticket 11465.
23175 o Major bugfixes (TLS cipher selection):
23176 - The relay ciphersuite list is now generated automatically based on
23177 uniform criteria, and includes all OpenSSL ciphersuites with
23178 acceptable strength and forward secrecy. Previously, we had left
23179 some perfectly fine ciphersuites unsupported due to omission or
23180 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
23181 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
23182 - Relays now trust themselves to have a better view than clients of
23183 which TLS ciphersuites are better than others. (Thanks to bug
23184 11513, the relay list is now well-considered, whereas the client
23185 list has been chosen mainly for anti-fingerprinting purposes.)
23186 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
23187 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
23188 AES128. Resolves ticket 11528.
23189 - Clients now try to advertise the same list of ciphersuites as
23190 Firefox 28. This change enables selection of (fast) GCM
23191 ciphersuites, disables some strange old ciphers, and stops
23192 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
23193 Resolves ticket 11438.
23195 o Major bugfixes (bridge client):
23196 - Avoid 60-second delays in the bootstrapping process when Tor is
23197 launching for a second time while using bridges. Fixes bug 9229;
23198 bugfix on 0.2.0.3-alpha.
23200 o Minor features (transparent proxy, *BSD):
23201 - Support FreeBSD's ipfw firewall interface for TransPort ports on
23202 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
23203 10267; patch from "yurivict".
23204 - Support OpenBSD's divert-to rules with the pf firewall for
23205 transparent proxy ports. To enable it, set "TransProxyType
23206 pf-divert". This allows Tor to run a TransPort transparent proxy
23207 port on OpenBSD 4.4 or later without root privileges. See the
23208 pf.conf(5) manual page for information on configuring pf to use
23209 divert-to rules. Closes ticket 10896; patch from Dana Koch.
23211 o Minor features (security):
23212 - New --enable-expensive-hardening option to enable security
23213 hardening options that consume nontrivial amounts of CPU and
23214 memory. Right now, this includes AddressSanitizer and UbSan, which
23215 are supported in newer versions of GCC and Clang. Closes ticket
23218 o Minor features (log verbosity):
23219 - Demote the message that we give when a flushing connection times
23220 out for too long from NOTICE to INFO. It was usually meaningless.
23221 Resolves ticket 5286.
23222 - Don't log so many notice-level bootstrapping messages at startup
23223 about downloading descriptors. Previously, we'd log a notice
23224 whenever we learned about more routers. Now, we only log a notice
23225 at every 5% of progress. Fixes bug 9963.
23226 - Warn less verbosely when receiving a malformed
23227 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
23228 - When we run out of usable circuit IDs on a channel, log only one
23229 warning for the whole channel, and describe how many circuits
23230 there were on the channel. Fixes part of ticket 11553.
23232 o Minor features (relay):
23233 - If a circuit timed out for at least 3 minutes, check if we have a
23234 new external IP address, and publish a new descriptor with the new
23235 IP address if it changed. Resolves ticket 2454.
23237 o Minor features (controller):
23238 - Make the entire exit policy available from the control port via
23239 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
23241 - Because of the fix for ticket 11396, the real limit for memory
23242 usage may no longer match the configured MaxMemInQueues value. The
23243 real limit is now exposed via GETINFO limits/max-mem-in-queues.
23245 o Minor features (bridge client):
23246 - Report a more useful failure message when we can't connect to a
23247 bridge because we don't have the right pluggable transport
23248 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
23250 o Minor features (diagnostic):
23251 - Add more log messages to diagnose bug 7164, which causes
23252 intermittent "microdesc_free() called but md was still referenced"
23253 warnings. We now include more information, to figure out why we
23254 might be cleaning a microdescriptor for being too old if it's
23255 still referenced by a live node_t object.
23257 o Minor bugfixes (client, DNSPort):
23258 - When using DNSPort, try to respond to AAAA requests with AAAA
23259 answers. Previously, we hadn't looked at the request type when
23260 deciding which answer type to prefer. Fixes bug 10468; bugfix on
23262 - When receiving a DNS query for an unsupported record type, reply
23263 with no answer rather than with a NOTIMPL error. This behavior
23264 isn't correct either, but it will break fewer client programs, we
23265 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
23268 o Minor bugfixes (exit relay):
23269 - Stop leaking memory when we successfully resolve a PTR record.
23270 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
23272 o Minor bugfixes (bridge client):
23273 - Stop accepting bridge lines containing hostnames. Doing so would
23274 cause clients to perform DNS requests on the hostnames, which was
23275 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
23276 - Avoid a 60-second delay in the bootstrapping process when a Tor
23277 client with pluggable transports re-reads its configuration at
23278 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
23280 o Minor bugfixes (client, logging during bootstrap):
23281 - Warn only once if we start logging in an unsafe way. Previously,
23282 we complain as many times as we had problems. Fixes bug 9870;
23283 bugfix on 0.2.5.1-alpha.
23284 - Only report the first fatal bootstrap error on a given OR
23285 connection. This stops us from telling the controller bogus error
23286 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
23287 - Be more helpful when trying to run sandboxed on Linux without
23288 libseccomp. Instead of saying "Sandbox is not implemented on this
23289 platform", we now explain that we need to be built with
23290 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
23291 - Avoid generating spurious warnings when starting with
23292 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
23295 o Minor bugfixes (closing OR connections):
23296 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
23297 check if it's an or_connection_t and correctly call
23298 connection_or_close_for_error() rather than
23299 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
23301 - When closing all connections on setting DisableNetwork to 1, use
23302 connection_or_close_normally() rather than closing OR connections
23303 out from under the channel layer. Fixes bug 11306; bugfix on
23306 o Minor bugfixes (controller):
23307 - Avoid sending a garbage value to the controller when a circuit is
23308 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
23310 o Minor bugfixes (tor-fw-helper):
23311 - Allow tor-fw-helper to build again by adding src/ext to its
23312 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
23314 o Minor bugfixes (bridges):
23315 - Avoid potential crashes or bad behavior when launching a
23316 server-side managed proxy with ORPort or ExtORPort temporarily
23317 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
23319 o Minor bugfixes (platform-specific):
23320 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
23321 bug 11426; bugfix on 0.2.5.3-alpha.
23322 - When dumping a malformed directory object to disk, save it in
23323 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
23325 - Don't report failures from make_socket_reuseable() on incoming
23326 sockets on OSX: this can happen when incoming connections close
23327 early. Fixes bug 10081.
23329 o Minor bugfixes (trivial memory leaks):
23330 - Fix a small memory leak when signing a directory object. Fixes bug
23331 11275; bugfix on 0.2.4.13-alpha.
23332 - Free placeholder entries in our circuit table at exit; fixes a
23333 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
23334 - Don't re-initialize a second set of OpenSSL mutexes when starting
23335 up. Previously, we'd make one set of mutexes, and then immediately
23336 replace them with another. Fixes bug 11726; bugfix on
23338 - Resolve some memory leaks found by coverity in the unit tests, on
23339 exit in tor-gencert, and on a failure to compute digests for our
23340 own keys when generating a v3 networkstatus vote. These leaks
23341 should never have affected anyone in practice.
23343 o Minor bugfixes (hidden service):
23344 - Only retry attempts to connect to a chosen rendezvous point 8
23345 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
23347 o Minor bugfixes (misc code correctness):
23348 - Fix various instances of undefined behavior in channeltls.c,
23349 tor_memmem(), and eventdns.c that would cause us to construct
23350 pointers to memory outside an allocated object. (These invalid
23351 pointers were not accessed, but C does not even allow them to
23352 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
23353 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
23354 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
23355 fix some miscellaneous errors in our tests and codebase. Fixes bug
23356 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
23357 - Always check return values for unlink, munmap, UnmapViewOfFile;
23358 check strftime return values more often. In some cases all we can
23359 do is report a warning, but this may help prevent deeper bugs from
23360 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
23362 - Fix numerous warnings from the clang "scan-build" static analyzer.
23363 Some of these are programming style issues; some of them are false
23364 positives that indicated awkward code; some are undefined behavior
23365 cases related to constructing (but not using) invalid pointers;
23366 some are assumptions about API behavior; some are (harmlessly)
23367 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
23368 correct; and one or two are genuine bugs that weren't reachable
23369 from the rest of the program. Fixes bug 8793; bugfixes on many,
23373 - Build the torify.1 manpage again. Previously, we were only trying
23374 to build it when also building tor-fw-helper. That's why we didn't
23375 notice that we'd broken the ability to build it. Fixes bug 11321;
23376 bugfix on 0.2.5.1-alpha.
23377 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
23378 11061; bugfix on 0.2.4.7-alpha.
23379 - Correctly document that we search for a system torrc file before
23380 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
23382 - Resolve warnings from Doxygen.
23384 o Code simplifications and refactoring:
23385 - Remove is_internal_IP() function. Resolves ticket 4645.
23386 - Remove unused function circuit_dump_by_chan from circuitlist.c.
23387 Closes issue 9107; patch from "marek".
23388 - Change our use of the ENUM_BF macro to avoid declarations that
23391 o Deprecated versions:
23392 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
23393 attention for some while. Directory authorities no longer accept
23394 descriptors from relays running any version of Tor prior to Tor
23395 0.2.3.16-alpha. Resolves ticket 11149.
23398 - New macros in test.h to simplify writing mock-functions for unit
23399 tests. Part of ticket 11507. Patch from Dana Koch.
23400 - Complete tests for the status.c module. Resolves ticket 11507.
23401 Patch from Dana Koch.
23404 - Remove all code for the long unused v1 directory protocol.
23405 Resolves ticket 11070.
23408 Changes in version 0.2.5.3-alpha - 2014-03-22
23409 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
23410 two new anti-DoS features for Tor relays, resolves a bug that kept
23411 SOCKS5 support for IPv6 from working, fixes several annoying usability
23412 issues for bridge users, and removes more old code for unused
23415 The Tor 0.2.5.x release series is now in patch-freeze: no feature
23416 patches not already written will be considered for inclusion in 0.2.5.x.
23418 o Major features (relay security, DoS-resistance):
23419 - When deciding whether we have run out of memory and we need to
23420 close circuits, also consider memory allocated in buffers for
23421 streams attached to each circuit.
23423 This change, which extends an anti-DoS feature introduced in
23424 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
23425 better resist more memory-based DoS attacks than before. Since the
23426 MaxMemInCellQueues option now applies to all queues, it is renamed
23427 to MaxMemInQueues. This feature fixes bug 10169.
23428 - Avoid hash-flooding denial-of-service attacks by using the secure
23429 SipHash-2-4 hash function for our hashtables. Without this
23430 feature, an attacker could degrade performance of a targeted
23431 client or server by flooding their data structures with a large
23432 number of entries to be stored at the same hash table position,
23433 thereby slowing down the Tor instance. With this feature, hash
23434 table positions are derived from a randomized cryptographic key,
23435 and an attacker cannot predict which entries will collide. Closes
23437 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
23438 the default at 8GBytes), to better support Raspberry Pi users. Fixes
23439 bug 9686; bugfix on 0.2.4.14-alpha.
23441 o Minor features (bridges, pluggable transports):
23442 - Bridges now write the SHA1 digest of their identity key
23443 fingerprint (that is, a hash of a hash of their public key) to
23444 notice-level logs, and to a new hashed-fingerprint file. This
23445 information will help bridge operators look up their bridge in
23446 Globe and similar tools. Resolves ticket 10884.
23447 - Improve the message that Tor displays when running as a bridge
23448 using pluggable transports without an Extended ORPort listener.
23449 Also, log the message in the log file too. Resolves ticket 11043.
23451 o Minor features (other):
23452 - Add a new option, PredictedPortsRelevanceTime, to control how long
23453 after having received a request to connect to a given port Tor
23454 will try to keep circuits ready in anticipation of future requests
23455 for that port. Patch from "unixninja92"; implements ticket 9176.
23456 - Generate a warning if any ports are listed in the SocksPolicy,
23457 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
23458 AuthDirBadExit options. (These options only support address
23459 ranges.) Fixes part of ticket 11108.
23460 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
23463 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
23464 - Build without warnings under clang 3.4. (We have some macros that
23465 define static functions only some of which will get used later in
23466 the module. Starting with clang 3.4, these give a warning unless the
23467 unused attribute is set on them.) Resolves ticket 10904.
23468 - Fix build warnings about missing "a2x" comment when building the
23469 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23470 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23472 o Minor bugfixes (client):
23473 - Improve the log message when we can't connect to a hidden service
23474 because all of the hidden service directory nodes hosting its
23475 descriptor are excluded. Improves on our fix for bug 10722, which
23476 was a bugfix on 0.2.0.10-alpha.
23477 - Raise a control port warning when we fail to connect to all of
23478 our bridges. Previously, we didn't inform the controller, and
23479 the bootstrap process would stall. Fixes bug 11069; bugfix on
23481 - Exit immediately when a process-owning controller exits.
23482 Previously, tor relays would wait for a little while after their
23483 controller exited, as if they had gotten an INT signal -- but this
23484 was problematic, since there was no feedback for the user. To do a
23485 clean shutdown, controllers should send an INT signal and give Tor
23486 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
23487 - Stop attempting to connect to bridges before our pluggable
23488 transports are configured (harmless but resulted in some erroneous
23489 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
23490 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
23491 generating incorrect SOCKS5 responses, and confusing client
23492 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
23494 o Minor bugfixes (relays and bridges):
23495 - Avoid crashing on a malformed resolv.conf file when running a
23496 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
23497 - Non-exit relays no longer launch mock DNS requests to check for
23498 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
23499 non-exit relays stopped servicing DNS requests. Fixes bug 965;
23500 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
23501 - Bridges now report complete directory request statistics. Related
23502 to bug 5824; bugfix on 0.2.2.1-alpha.
23503 - Bridges now never collect statistics that were designed for
23504 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
23505 - Stop giving annoying warning messages when we decide not to launch
23506 a pluggable transport proxy that we don't need (because there are
23507 no bridges configured to use it). Resolves ticket 5018; bugfix
23509 - Give the correct URL in the warning message when trying to run a
23510 relay on an ancient version of Windows. Fixes bug 9393.
23512 o Minor bugfixes (backtrace support):
23513 - Support automatic backtraces on more platforms by using the
23514 "-fasynchronous-unwind-tables" compiler option. This option is
23515 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
23516 is on by default and table generation is not. This doesn't yet
23517 add Windows support; only Linux, OSX, and some BSDs are affected.
23518 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
23519 - Avoid strange behavior if two threads hit failed assertions at the
23520 same time and both try to log backtraces at once. (Previously, if
23521 this had happened, both threads would have stored their intermediate
23522 results in the same buffer, and generated junk outputs.) Reported by
23523 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
23524 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
23525 0.2.5.2-alpha; patch from Nick Hopper.
23527 o Minor bugfixes (unit tests):
23528 - Fix a small bug in the unit tests that might have made the tests
23529 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
23530 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
23533 - Remove all remaining code related to version-0 hidden service
23534 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
23535 the rest of bug 10841.
23538 - Document in the manpage that "KBytes" may also be written as
23539 "kilobytes" or "KB", that "Kbits" may also be written as
23540 "kilobits", and so forth. Closes ticket 9222.
23541 - Document that the ClientOnly config option overrides ORPort.
23542 Our old explanation made ClientOnly sound as though it did
23543 nothing at all. Resolves bug 9059.
23544 - Explain that SocksPolicy, DirPolicy, and similar options don't
23545 take port arguments. Fixes the other part of ticket 11108.
23546 - Fix a comment about the rend_server_descriptor_t.protocols field
23547 to more accurately describe its range. Also, make that field
23548 unsigned, to more accurately reflect its usage. Fixes bug 9099;
23549 bugfix on 0.2.1.5-alpha.
23550 - Fix the manpage's description of HiddenServiceAuthorizeClient:
23551 the maximum client name length is 16, not 19. Fixes bug 11118;
23552 bugfix on 0.2.1.6-alpha.
23554 o Code simplifications and refactoring:
23555 - Get rid of router->address, since in all cases it was just the
23556 string representation of router->addr. Resolves ticket 5528.
23558 o Test infrastructure:
23559 - Update to the latest version of tinytest.
23560 - Improve the tinytest implementation of string operation tests so
23561 that comparisons with NULL strings no longer crash the tests; they
23562 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
23565 Changes in version 0.2.4.21 - 2014-02-28
23566 Tor 0.2.4.21 further improves security against potential adversaries who
23567 find breaking 1024-bit crypto doable, and backports several stability
23568 and robustness patches from the 0.2.5 branch.
23570 o Major features (client security):
23571 - When we choose a path for a 3-hop circuit, make sure it contains
23572 at least one relay that supports the NTor circuit extension
23573 handshake. Otherwise, there is a chance that we're building
23574 a circuit that's worth attacking by an adversary who finds
23575 breaking 1024-bit crypto doable, and that chance changes the game
23576 theory. Implements ticket 9777.
23579 - Do not treat streams that fail with reason
23580 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23581 since it could also indicate an ENETUNREACH connection error. Fixes
23582 part of bug 10777; bugfix on 0.2.4.8-alpha.
23584 o Code simplification and refactoring:
23585 - Remove data structures which were introduced to implement the
23586 CellStatistics option: they are now redundant with the new timestamp
23587 field in the regular packed_cell_t data structure, which we did
23588 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
23591 - Always clear OpenSSL bignums before freeing them -- even bignums
23592 that don't contain secrets. Resolves ticket 10793. Patch by
23594 - Build without warnings under clang 3.4. (We have some macros that
23595 define static functions only some of which will get used later in
23596 the module. Starting with clang 3.4, these give a warning unless the
23597 unused attribute is set on them.) Resolves ticket 10904.
23598 - Update geoip and geoip6 files to the February 7 2014 Maxmind
23599 GeoLite2 Country database.
23602 - Set the listen() backlog limit to the largest actually supported
23603 on the system, not to the value in a header file. Fixes bug 9716;
23604 bugfix on every released Tor.
23605 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23606 exit node as a NOROUTE error, not an INTERNAL error, since they
23607 can apparently happen when trying to connect to the wrong sort
23608 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23609 - Fix build warnings about missing "a2x" comment when building the
23610 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23611 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23612 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23613 not entirely remove it from the connection lists. Fixes bug 9602;
23614 bugfix on 0.2.4.4-alpha.
23615 - Fix a segmentation fault in our benchmark code when running with
23616 Fedora's OpenSSL package, or any other OpenSSL that provides
23617 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23618 - Turn "circuit handshake stats since last time" log messages into a
23619 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23621 o Documentation fixes:
23622 - Document that all but one DirPort entry must have the NoAdvertise
23623 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23626 Changes in version 0.2.5.2-alpha - 2014-02-13
23627 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
23628 like the "poor random number generation" fix and the "building too many
23629 circuits" fix. It also further improves security against potential
23630 adversaries who find breaking 1024-bit crypto doable, and launches
23631 pluggable transports on demand (which gets us closer to integrating
23632 pluggable transport support by default -- not to be confused with Tor
23633 bundles enabling pluggable transports and bridges by default).
23635 o Major features (client security):
23636 - When we choose a path for a 3-hop circuit, make sure it contains
23637 at least one relay that supports the NTor circuit extension
23638 handshake. Otherwise, there is a chance that we're building
23639 a circuit that's worth attacking by an adversary who finds
23640 breaking 1024-bit crypto doable, and that chance changes the game
23641 theory. Implements ticket 9777.
23642 - Clients now look at the "usecreatefast" consensus parameter to
23643 decide whether to use CREATE_FAST or CREATE cells for the first hop
23644 of their circuit. This approach can improve security on connections
23645 where Tor's circuit handshake is stronger than the available TLS
23646 connection security levels, but the tradeoff is more computational
23647 load on guard relays. Implements proposal 221. Resolves ticket 9386.
23649 o Major features (bridges):
23650 - Don't launch pluggable transport proxies if we don't have any
23651 bridges configured that would use them. Now we can list many
23652 pluggable transports, and Tor will dynamically start one when it
23653 hears a bridge address that needs it. Resolves ticket 5018.
23654 - The bridge directory authority now assigns status flags (Stable,
23655 Guard, etc) to bridges based on thresholds calculated over all
23656 Running bridges. Now bridgedb can finally make use of its features
23657 to e.g. include at least one Stable bridge in its answers. Fixes
23660 o Major features (other):
23661 - Extend ORCONN controller event to include an "ID" parameter,
23662 and add four new controller event types CONN_BW, CIRC_BW,
23663 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
23664 The new events are emitted in private Tor networks only, with the
23665 goal of being able to better track performance and load during
23666 full-network simulations. Implements proposal 218 and ticket 7359.
23667 - On some platforms (currently: recent OSX versions, glibc-based
23668 platforms that support the ELF format, and a few other
23669 Unix-like operating systems), Tor can now dump stack traces
23670 when a crash occurs or an assertion fails. By default, traces
23671 are dumped to stderr (if possible) and to any logs that are
23672 reporting errors. Implements ticket 9299.
23675 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23676 not entirely remove it from the connection lists. Fixes bug 9602;
23677 bugfix on 0.2.4.4-alpha.
23678 - Do not treat streams that fail with reason
23679 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23680 since it could also indicate an ENETUNREACH connection error. Fixes
23681 part of bug 10777; bugfix on 0.2.4.8-alpha.
23683 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23684 - Do not allow OpenSSL engines to replace the PRNG, even when
23685 HardwareAccel is set. The only default builtin PRNG engine uses
23686 the Intel RDRAND instruction to replace the entire PRNG, and
23687 ignores all attempts to seed it with more entropy. That's
23688 cryptographically stupid: the right response to a new alleged
23689 entropy source is never to discard all previously used entropy
23690 sources. Fixes bug 10402; works around behavior introduced in
23691 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23693 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23694 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23695 - Avoid launching spurious extra circuits when a stream is pending.
23696 This fixes a bug where any circuit that _wasn't_ unusable for new
23697 streams would be treated as if it were, causing extra circuits to
23698 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23700 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23701 - No longer stop reading or writing on cpuworker connections when
23702 our rate limiting buckets go empty. Now we should handle circuit
23703 handshake requests more promptly. Resolves bug 9731.
23704 - Stop trying to bootstrap all our directory information from
23705 only our first guard. Discovered while fixing bug 9946; bugfix
23708 o Minor features (bridges, pluggable transports):
23709 - Add threshold cutoffs to the networkstatus document created by
23710 the Bridge Authority. Fixes bug 1117.
23711 - On Windows, spawn background processes using the CREATE_NO_WINDOW
23712 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
23713 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
23714 Vidalia set this option for us.) Implements ticket 10297.
23716 o Minor features (security):
23717 - Always clear OpenSSL bignums before freeing them -- even bignums
23718 that don't contain secrets. Resolves ticket 10793. Patch by
23721 o Minor features (config options and command line):
23722 - Add an --allow-missing-torrc commandline option that tells Tor to
23723 run even if the configuration file specified by -f is not available.
23724 Implements ticket 10060.
23725 - Add support for the TPROXY transparent proxying facility on Linux.
23726 See documentation for the new TransProxyType option for more
23727 details. Implementation by "thomo". Closes ticket 10582.
23729 o Minor features (controller):
23730 - Add a new "HS_DESC" controller event that reports activities
23731 related to hidden service descriptors. Resolves ticket 8510.
23732 - New "DROPGUARDS" controller command to forget all current entry
23733 guards. Not recommended for ordinary use, since replacing guards
23734 too frequently makes several attacks easier. Resolves ticket 9934;
23737 o Minor features (build):
23738 - Assume that a user using ./configure --host wants to cross-compile,
23739 and give an error if we cannot find a properly named
23740 tool-chain. Add a --disable-tool-name-check option to proceed
23741 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
23742 - If we run ./configure and the compiler recognizes -fstack-protector
23743 but the linker rejects it, warn the user about a potentially missing
23744 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
23746 o Minor features (testing):
23747 - If Python is installed, "make check" now runs extra tests beyond
23748 the unit test scripts.
23749 - When bootstrapping a test network, sometimes very few relays get
23750 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
23751 specify a set of relays which should be voted Guard regardless of
23752 their uptime or bandwidth. Addresses ticket 9206.
23754 o Minor features (log messages):
23755 - When ServerTransportPlugin is set on a bridge, Tor can write more
23756 useful statistics about bridge use in its extrainfo descriptors,
23757 but only if the Extended ORPort ("ExtORPort") is set too. Add a
23758 log message to inform the user in this case. Resolves ticket 9651.
23759 - When receiving a new controller connection, log the origin address.
23760 Resolves ticket 9698; patch from "sigpipe".
23761 - When logging OpenSSL engine status at startup, log the status of
23762 more engines. Fixes ticket 10043; patch from Joshua Datko.
23763 - Turn "circuit handshake stats since last time" log messages into a
23764 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23766 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23767 - Improve the circuit queue out-of-memory handler. Previously, when
23768 we ran low on memory, we'd close whichever circuits had the most
23769 queued cells. Now, we close those that have the *oldest* queued
23770 cells, on the theory that those are most responsible for us
23771 running low on memory. Based on analysis from a forthcoming paper
23772 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23773 - Generate bootstrapping status update events correctly when fetching
23774 microdescriptors. Fixes bug 9927.
23775 - Update to the October 2 2013 Maxmind GeoLite Country database.
23777 o Minor bugfixes (clients):
23778 - When closing a channel that has already been open, do not close
23779 pending circuits that were waiting to connect to the same relay.
23780 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
23783 o Minor bugfixes (relays):
23784 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23785 exit node as a NOROUTE error, not an INTERNAL error, since they
23786 can apparently happen when trying to connect to the wrong sort
23787 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23789 o Minor bugfixes (bridges):
23790 - Fix a bug where the first connection works to a bridge that uses a
23791 pluggable transport with client-side parameters, but we don't send
23792 the client-side parameters on subsequent connections. (We don't
23793 use any pluggable transports with client-side parameters yet,
23794 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
23795 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
23797 o Minor bugfixes (node selection):
23798 - If ExcludeNodes is set, consider non-excluded hidden service
23799 directory servers before excluded ones. Do not consider excluded
23800 hidden service directory servers at all if StrictNodes is
23801 set. (Previously, we would sometimes decide to connect to those
23802 servers, and then realize before we initiated a connection that
23803 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
23804 Reported by "mr-4".
23805 - If we set the ExitNodes option but it doesn't include any nodes
23806 that have the Exit flag, we would choose not to bootstrap. Now we
23807 bootstrap so long as ExitNodes includes nodes which can exit to
23808 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
23810 o Minor bugfixes (controller and command-line):
23811 - If changing a config option via "setconf" fails in a recoverable
23812 way, we used to nonetheless write our new control ports to the
23813 file described by the "ControlPortWriteToFile" option. Now we only
23814 write out that file if we successfully switch to the new config
23815 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
23816 - When a command-line option such as --version or --help that
23817 ordinarily implies --hush appears on the command line along with
23818 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
23819 only if it appeared later on the command line. Fixes bug 9578;
23820 bugfix on 0.2.5.1-alpha.
23822 o Minor bugfixes (code correctness):
23823 - Previously we used two temporary files when writing descriptors to
23824 disk; now we only use one. Fixes bug 1376.
23825 - Remove an erroneous (but impossible and thus harmless) pointer
23826 comparison that would have allowed compilers to skip a bounds
23827 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
23828 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
23829 - Fix an always-true assertion in pluggable transports code so it
23830 actually checks what it was trying to check. Fixes bug 10046;
23831 bugfix on 0.2.3.9-alpha. Found by "dcb".
23833 o Minor bugfixes (protocol correctness):
23834 - When receiving a VERSIONS cell with an odd number of bytes, close
23835 the connection immediately since the cell is malformed. Fixes bug
23836 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
23839 o Minor bugfixes (build):
23840 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
23841 turned off (that is, without support for v2 link handshakes). Fixes
23842 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
23843 - Fix compilation warnings and startup issues when running with
23844 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
23846 - Fix compilation on Solaris 9, which didn't like us having an
23847 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
23849 o Minor bugfixes (testing):
23850 - Fix a segmentation fault in our benchmark code when running with
23851 Fedora's OpenSSL package, or any other OpenSSL that provides
23852 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23854 o Minor bugfixes (log messages):
23855 - Fix a bug where clients using bridges would report themselves
23856 as 50% bootstrapped even without a live consensus document.
23857 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
23858 - Suppress a warning where, if there's only one directory authority
23859 in the network, we would complain that votes and signatures cannot
23860 be uploaded to other directory authorities. Fixes bug 10842;
23861 bugfix on 0.2.2.26-beta.
23862 - Report bootstrapping progress correctly when we're downloading
23863 microdescriptors. We had updated our "do we have enough microdescs
23864 to begin building circuits?" logic most recently in 0.2.4.10-alpha
23865 (see bug 5956), but we left the bootstrap status event logic at
23866 "how far through getting 1/4 of them are we?" Fixes bug 9958;
23867 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
23869 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23870 - Avoid a crash bug when starting with a corrupted microdescriptor
23871 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23872 - If we fail to dump a previously cached microdescriptor to disk, avoid
23873 freeing duplicate data later on. Fixes bug 10423; bugfix on
23874 0.2.4.13-alpha. Spotted by "bobnomnom".
23876 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23877 - Correctly log long IPv6 exit policies, instead of truncating them
23878 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23879 - Our default TLS ecdhe groups were backwards: we meant to be using
23880 P224 for relays (for performance win) and P256 for bridges (since
23881 it is more common in the wild). Instead we had it backwards. After
23882 reconsideration, we decided that the default should be P256 on all
23883 hosts, since its security is probably better, and since P224 is
23884 reportedly used quite little in the wild. Found by "skruffy" on
23885 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23886 - Free directory authority certificate download statuses on exit
23887 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23889 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23890 - If the guard we choose first doesn't answer, we would try the
23891 second guard, but once we connected to the second guard we would
23892 abandon it and retry the first one, slowing down bootstrapping.
23893 The fix is to treat all our initially chosen guards as acceptable
23894 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23895 - Fix an assertion failure that would occur when disabling the
23896 ORPort setting on a running Tor process while accounting was
23897 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23898 - When examining the list of network interfaces to find our address,
23899 do not consider non-running or disabled network interfaces. Fixes
23900 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23901 - Avoid an off-by-one error when checking buffer boundaries when
23902 formatting the exit status of a pluggable transport helper.
23903 This is probably not an exploitable bug, but better safe than
23904 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23907 o Removed code and features:
23908 - Clients now reject any directory authority certificates lacking
23909 a dir-key-crosscert element. These have been included since
23910 0.2.1.9-alpha, so there's no real reason for them to be optional
23911 any longer. Completes proposal 157. Resolves ticket 10162.
23912 - Remove all code that existed to support the v2 directory system,
23913 since there are no longer any v2 directory authorities. Resolves
23915 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
23916 options, which were used for designating authorities as "Hidden
23917 service authorities". There has been no use of hidden service
23918 authorities since 0.2.2.1-alpha, when we stopped uploading or
23919 downloading v0 hidden service descriptors. Fixes bug 10881; also
23920 part of a fix for bug 10841.
23922 o Code simplification and refactoring:
23923 - Remove some old fallback code designed to keep Tor clients working
23924 in a network with only two working relays. Elsewhere in the code we
23925 have long since stopped supporting such networks, so there wasn't
23926 much point in keeping it around. Addresses ticket 9926.
23927 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
23928 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
23929 - Remove data structures which were introduced to implement the
23930 CellStatistics option: they are now redundant with the addition
23931 of a timestamp to the regular packed_cell_t data structure, which
23932 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
23935 o Documentation (man page) fixes:
23936 - Update manpage to describe some of the files you can expect to
23937 find in Tor's DataDirectory. Addresses ticket 9839.
23938 - Document that all but one DirPort entry must have the NoAdvertise
23939 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23941 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23942 - Clarify the usage and risks of setting the ContactInfo torrc line
23943 for your relay or bridge. Resolves ticket 9854.
23944 - Add anchors to the manpage so we can link to the html version of
23945 the documentation for specific options. Resolves ticket 9866.
23946 - Replace remaining references to DirServer in man page and
23947 log entries. Resolves ticket 10124.
23950 - Make the "tor-gencert" tool used by directory authority operators
23951 create 2048-bit signing keys by default (rather than 1024-bit, since
23952 1024-bit is uncomfortably small these days). Addresses ticket 10324.
23955 Changes in version 0.2.4.20 - 2013-12-22
23956 Tor 0.2.4.20 fixes potentially poor random number generation for users
23957 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
23958 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
23959 and 4) have no state file in their DataDirectory (as would happen on
23960 first start). Users who generated relay or hidden service identity
23961 keys in such a situation should discard them and generate new ones.
23963 This release also fixes a logic error that caused Tor clients to build
23964 many more preemptive circuits than they actually need.
23967 - Do not allow OpenSSL engines to replace the PRNG, even when
23968 HardwareAccel is set. The only default builtin PRNG engine uses
23969 the Intel RDRAND instruction to replace the entire PRNG, and
23970 ignores all attempts to seed it with more entropy. That's
23971 cryptographically stupid: the right response to a new alleged
23972 entropy source is never to discard all previously used entropy
23973 sources. Fixes bug 10402; works around behavior introduced in
23974 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23976 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23977 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23978 - Avoid launching spurious extra circuits when a stream is pending.
23979 This fixes a bug where any circuit that _wasn't_ unusable for new
23980 streams would be treated as if it were, causing extra circuits to
23981 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23984 - Avoid a crash bug when starting with a corrupted microdescriptor
23985 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23986 - If we fail to dump a previously cached microdescriptor to disk, avoid
23987 freeing duplicate data later on. Fixes bug 10423; bugfix on
23988 0.2.4.13-alpha. Spotted by "bobnomnom".
23991 Changes in version 0.2.4.19 - 2013-12-11
23992 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
23993 (1986-2013). Aaron worked on diverse projects including helping to guide
23994 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
23995 transparency to the U.S government's PACER documents, and contributing
23996 design and development for Tor and Tor2Web. Aaron was one of the latest
23997 martyrs in our collective fight for civil liberties and human rights,
23998 and his death is all the more painful because he was one of us.
24000 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
24001 a new circuit handshake and link encryption that use ECC to provide
24002 better security and efficiency; makes relays better manage circuit
24003 creation requests; uses "directory guards" to reduce client enumeration
24004 risks; makes bridges collect and report statistics about the pluggable
24005 transports they support; cleans up and improves our geoip database;
24006 gets much closer to IPv6 support for clients, bridges, and relays; makes
24007 directory authorities use measured bandwidths rather than advertised
24008 ones when computing flags and thresholds; disables client-side DNS
24009 caching to reduce tracking risks; and fixes a big bug in bridge
24010 reachability testing. This release introduces two new design
24011 abstractions in the code: a new "channel" abstraction between circuits
24012 and or_connections to allow for implementing alternate relay-to-relay
24013 transports, and a new "circuitmux" abstraction storing the queue of
24014 circuits for a channel. The release also includes many stability,
24015 security, and privacy fixes.
24018 Changes in version 0.2.4.18-rc - 2013-11-16
24019 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
24020 series. It takes a variety of fixes from the 0.2.5.x branch to improve
24021 stability, performance, and better handling of edge cases.
24024 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
24025 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
24026 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
24027 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
24028 them to solve bug 6033.)
24031 - No longer stop reading or writing on cpuworker connections when
24032 our rate limiting buckets go empty. Now we should handle circuit
24033 handshake requests more promptly. Resolves bug 9731.
24034 - If we are unable to save a microdescriptor to the journal, do not
24035 drop it from memory and then reattempt downloading it. Fixes bug
24036 9645; bugfix on 0.2.2.6-alpha.
24037 - Stop trying to bootstrap all our directory information from
24038 only our first guard. Discovered while fixing bug 9946; bugfix
24040 - The new channel code sometimes lost track of in-progress circuits,
24041 causing long-running clients to stop building new circuits. The
24042 fix is to always call circuit_n_chan_done(chan, 0) from
24043 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
24045 o Minor bugfixes (on 0.2.4.x):
24046 - Correctly log long IPv6 exit policies, instead of truncating them
24047 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
24048 - Our default TLS ecdhe groups were backwards: we meant to be using
24049 P224 for relays (for performance win) and P256 for bridges (since
24050 it is more common in the wild). Instead we had it backwards. After
24051 reconsideration, we decided that the default should be P256 on all
24052 hosts, since its security is probably better, and since P224 is
24053 reportedly used quite little in the wild. Found by "skruffy" on
24054 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
24055 - Free directory authority certificate download statuses on exit
24056 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
24058 o Minor bugfixes (on 0.2.3.x and earlier):
24059 - If the guard we choose first doesn't answer, we would try the
24060 second guard, but once we connected to the second guard we would
24061 abandon it and retry the first one, slowing down bootstrapping.
24062 The fix is to treat all our initially chosen guards as acceptable
24063 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
24064 - Fix an assertion failure that would occur when disabling the
24065 ORPort setting on a running Tor process while accounting was
24066 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
24067 - When examining the list of network interfaces to find our address,
24068 do not consider non-running or disabled network interfaces. Fixes
24069 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
24070 - Avoid an off-by-one error when checking buffer boundaries when
24071 formatting the exit status of a pluggable transport helper.
24072 This is probably not an exploitable bug, but better safe than
24073 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
24076 o Minor features (protecting client timestamps):
24077 - Clients no longer send timestamps in their NETINFO cells. These were
24078 not used for anything, and they provided one small way for clients
24079 to be distinguished from each other as they moved from network to
24080 network or behind NAT. Implements part of proposal 222.
24081 - Clients now round timestamps in INTRODUCE cells down to the nearest
24082 10 minutes. If a new Support022HiddenServices option is set to 0, or
24083 if it's set to "auto" and the feature is disabled in the consensus,
24084 the timestamp is sent as 0 instead. Implements part of proposal 222.
24085 - Stop sending timestamps in AUTHENTICATE cells. This is not such
24086 a big deal from a security point of view, but it achieves no actual
24087 good purpose, and isn't needed. Implements part of proposal 222.
24088 - Reduce down accuracy of timestamps in hidden service descriptors.
24089 Implements part of proposal 222.
24091 o Minor features (other):
24092 - Improve the circuit queue out-of-memory handler. Previously, when
24093 we ran low on memory, we'd close whichever circuits had the most
24094 queued cells. Now, we close those that have the *oldest* queued
24095 cells, on the theory that those are most responsible for us
24096 running low on memory. Based on analysis from a forthcoming paper
24097 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
24098 - Generate bootstrapping status update events correctly when fetching
24099 microdescriptors. Fixes bug 9927.
24100 - Update to the October 2 2013 Maxmind GeoLite Country database.
24102 o Documentation fixes:
24103 - Clarify the usage and risks of setting the ContactInfo torrc line
24104 for your relay or bridge. Resolves ticket 9854.
24105 - Add anchors to the manpage so we can link to the html version of
24106 the documentation for specific options. Resolves ticket 9866.
24107 - Replace remaining references to DirServer in man page and
24108 log entries. Resolves ticket 10124.
24111 Changes in version 0.2.5.1-alpha - 2013-10-02
24112 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
24113 on Linux, allows bridges that offer pluggable transports to report usage
24114 statistics, fixes many issues to make testing easier, and provides
24115 a pile of minor features and bugfixes that have been waiting for a
24116 release of the new branch.
24118 This is the first alpha release in a new series, so expect there to
24119 be bugs. Users who would rather test out a more stable branch should
24120 stay with 0.2.4.x for now.
24122 o Major features (security):
24123 - Use the seccomp2 syscall filtering facility on Linux to limit
24124 which system calls Tor can invoke. This is an experimental,
24125 Linux-only feature to provide defense-in-depth against unknown
24126 attacks. To try turning it on, set "Sandbox 1" in your torrc
24127 file. Please be ready to report bugs. We hope to add support
24128 for better sandboxing in the future, including more fine-grained
24129 filters, better division of responsibility, and support for more
24130 platforms. This work has been done by Cristian-Matei Toader for
24131 Google Summer of Code.
24132 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
24133 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
24134 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
24135 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
24136 them to solve bug 6033.)
24138 o Major features (other):
24139 - Add support for passing arguments to managed pluggable transport
24140 proxies. Implements ticket 3594.
24141 - Bridges now track GeoIP information and the number of their users
24142 even when pluggable transports are in use, and report usage
24143 statistics in their extra-info descriptors. Resolves tickets 4773
24145 - Make testing Tor networks bootstrap better: lower directory fetch
24146 retry schedules and maximum interval without directory requests,
24147 and raise maximum download tries. Implements ticket 6752.
24148 - Add make target 'test-network' to run tests on a Chutney network.
24149 Implements ticket 8530.
24150 - The ntor handshake is now on-by-default, no matter what the
24151 directory authorities recommend. Implements ticket 8561.
24154 - Instead of writing destroy cells directly to outgoing connection
24155 buffers, queue them and intersperse them with other outgoing cells.
24156 This can prevent a set of resource starvation conditions where too
24157 many pending destroy cells prevent data cells from actually getting
24158 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
24159 bugfix on 0.2.0.1-alpha.
24160 - If we are unable to save a microdescriptor to the journal, do not
24161 drop it from memory and then reattempt downloading it. Fixes bug
24162 9645; bugfix on 0.2.2.6-alpha.
24163 - The new channel code sometimes lost track of in-progress circuits,
24164 causing long-running clients to stop building new circuits. The
24165 fix is to always call circuit_n_chan_done(chan, 0) from
24166 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
24169 - Tor now builds each source file in two modes: a mode that avoids
24170 exposing identifiers needlessly, and another mode that exposes
24171 more identifiers for testing. This lets the compiler do better at
24172 optimizing the production code, while enabling us to take more
24173 radical measures to let the unit tests test things.
24174 - The production builds no longer include functions used only in
24175 the unit tests; all functions exposed from a module only for
24176 unit-testing are now static in production builds.
24177 - Add an --enable-coverage configuration option to make the unit
24178 tests (and a new src/or/tor-cov target) to build with gcov test
24182 - We now have rudimentary function mocking support that our unit
24183 tests can use to test functions in isolation. Function mocking
24184 lets the tests temporarily replace a function's dependencies with
24185 stub functions, so that the tests can check the function without
24186 invoking the other functions it calls.
24187 - Add more unit tests for the <circid,channel>->circuit map, and
24188 the destroy-cell-tracking code to fix bug 7912.
24189 - Unit tests for failing cases of the TAP onion handshake.
24190 - More unit tests for address-manipulation functions.
24192 o Minor features (protecting client timestamps):
24193 - Clients no longer send timestamps in their NETINFO cells. These were
24194 not used for anything, and they provided one small way for clients
24195 to be distinguished from each other as they moved from network to
24196 network or behind NAT. Implements part of proposal 222.
24197 - Clients now round timestamps in INTRODUCE cells down to the nearest
24198 10 minutes. If a new Support022HiddenServices option is set to 0, or
24199 if it's set to "auto" and the feature is disabled in the consensus,
24200 the timestamp is sent as 0 instead. Implements part of proposal 222.
24201 - Stop sending timestamps in AUTHENTICATE cells. This is not such
24202 a big deal from a security point of view, but it achieves no actual
24203 good purpose, and isn't needed. Implements part of proposal 222.
24204 - Reduce down accuracy of timestamps in hidden service descriptors.
24205 Implements part of proposal 222.
24207 o Minor features (config options):
24208 - Config (torrc) lines now handle fingerprints which are missing
24209 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
24210 - Support a --dump-config option to print some or all of the
24211 configured options. Mainly useful for debugging the command-line
24212 option parsing code. Helps resolve ticket 4647.
24213 - Raise awareness of safer logging: notify user of potentially
24214 unsafe config options, like logging more verbosely than severity
24215 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
24216 - Add a new configuration option TestingV3AuthVotingStartOffset
24217 that bootstraps a network faster by changing the timing for
24218 consensus votes. Addresses ticket 8532.
24219 - Add a new torrc option "ServerTransportOptions" that allows
24220 bridge operators to pass configuration parameters to their
24221 pluggable transports. Resolves ticket 8929.
24222 - The config (torrc) file now accepts bandwidth and space limits in
24223 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
24224 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
24227 o Minor features (build):
24228 - Add support for `--library-versions` flag. Implements ticket 6384.
24229 - Return the "unexpected sendme" warnings to a warn severity, but make
24230 them rate limited, to help diagnose ticket 8093.
24231 - Detect a missing asciidoc, and warn the user about it, during
24232 configure rather than at build time. Fixes issue 6506. Patch from
24235 o Minor features (other):
24236 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
24237 sockets in a single system call. Implements ticket 5129.
24238 - Log current accounting state (bytes sent and received + remaining
24239 time for the current accounting period) in the relay's heartbeat
24240 message. Implements ticket 5526; patch from Peter Retzlaff.
24241 - Implement the TRANSPORT_LAUNCHED control port event that
24242 notifies controllers about new launched pluggable
24243 transports. Resolves ticket 5609.
24244 - If we're using the pure-C 32-bit curve25519_donna implementation
24245 of curve25519, build it with the -fomit-frame-pointer option to
24246 make it go faster on register-starved hosts. This improves our
24247 handshake performance by about 6% on i386 hosts without nacl.
24248 Closes ticket 8109.
24249 - Update to the September 4 2013 Maxmind GeoLite Country database.
24252 - Set the listen() backlog limit to the largest actually supported
24253 on the system, not to the value in a header file. Fixes bug 9716;
24254 bugfix on every released Tor.
24255 - No longer accept malformed http headers when parsing urls from
24256 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
24257 bugfix on 0.0.6pre1.
24258 - In munge_extrainfo_into_routerinfo(), check the return value of
24259 memchr(). This would have been a serious issue if we ever passed
24260 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
24262 - On the chance that somebody manages to build Tor on a
24263 platform where time_t is unsigned, correct the way that
24264 microdesc_add_to_cache() handles negative time arguments.
24265 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
24266 - Reject relative control socket paths and emit a warning. Previously,
24267 single-component control socket paths would be rejected, but Tor
24268 would not log why it could not validate the config. Fixes bug 9258;
24269 bugfix on 0.2.3.16-alpha.
24271 o Minor bugfixes (command line):
24272 - Use a single command-line parser for parsing torrc options on the
24273 command line and for finding special command-line options to avoid
24274 inconsistent behavior for torrc option arguments that have the same
24275 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
24277 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
24278 9573; bugfix on 0.0.9pre5.
24280 o Minor fixes (build, auxiliary programs):
24281 - Stop preprocessing the "torify" script with autoconf, since
24282 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
24284 - The tor-fw-helper program now follows the standard convention and
24285 exits with status code "0" on success. Fixes bug 9030; bugfix on
24286 0.2.3.1-alpha. Patch by Arlo Breault.
24287 - Corrected ./configure advice for what openssl dev package you should
24288 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
24290 o Minor code improvements:
24291 - Remove constants and tests for PKCS1 padding; it's insecure and
24292 shouldn't be used for anything new. Fixes bug 8792; patch
24294 - Remove instances of strcpy() from the unit tests. They weren't
24295 hurting anything, since they were only in the unit tests, but it's
24296 embarrassing to have strcpy() in the code at all, and some analysis
24297 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
24298 0.2.3.8-alpha. Patch from Arlo Breault.
24300 o Removed features:
24301 - Remove migration code from when we renamed the "cached-routers"
24302 file to "cached-descriptors" back in 0.2.0.8-alpha. This
24303 incidentally resolves ticket 6502 by cleaning up the related code
24304 a bit. Patch from Akshay Hebbar.
24306 o Code simplification and refactoring:
24307 - Extract the common duplicated code for creating a subdirectory
24308 of the data directory and writing to a file in it. Fixes ticket
24309 4282; patch from Peter Retzlaff.
24310 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
24311 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
24312 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
24313 - Add a set of accessor functions for the circuit timeout data
24314 structure. Fixes ticket 6153; patch from "piet".
24315 - Clean up exit paths from connection_listener_new(). Closes ticket
24316 8789. Patch from Arlo Breault.
24317 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
24318 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
24319 - Use a doubly-linked list to implement the global circuit list.
24320 Resolves ticket 9108. Patch from Marek Majkowski.
24321 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
24324 Changes in version 0.2.4.17-rc - 2013-09-05
24325 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
24326 series. It adds an emergency step to help us tolerate the massive
24327 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
24328 circuit-level handshakes now effectively jump the queue compared to
24329 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
24330 big bug hindering bridge reachability tests.
24333 - Relays now process the new "NTor" circuit-level handshake requests
24334 with higher priority than the old "TAP" circuit-level handshake
24335 requests. We still process some TAP requests to not totally starve
24336 0.2.3 clients when NTor becomes popular. A new consensus parameter
24337 "NumNTorsPerTAP" lets us tune the balance later if we need to.
24338 Implements ticket 9574.
24341 - If the circuit build timeout logic is disabled (via the consensus,
24342 or because we are an authority), then don't build testing circuits.
24343 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
24344 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
24345 previously they did not, which prevented them from receiving
24346 successful connections from relays for self-test or bandwidth
24347 testing. Also, when a relay is extending a circuit to a bridge,
24348 it needs to send a NETINFO cell, even when the bridge hasn't sent
24349 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
24350 - If the time to download the next old-style networkstatus is in
24351 the future, do not decline to consider whether to download the
24352 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
24356 - Avoid double-closing the listener socket in our socketpair()
24357 replacement (used on Windows) in the case where the addresses on
24358 our opened sockets don't match what we expected. Fixes bug 9400;
24359 bugfix on 0.0.2pre7. Found by Coverity.
24361 o Minor fixes (config options):
24362 - Avoid overflows when the user sets MaxCircuitDirtiness to a
24363 ridiculously high value, by imposing a (ridiculously high) 30-day
24364 maximum on MaxCircuitDirtiness.
24365 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
24366 message is logged at notice, not at info.
24367 - Warn and fail if a server is configured not to advertise any
24368 ORPorts at all. (We need *something* to put in our descriptor,
24369 or we just won't work.)
24372 - Track how many "TAP" and "NTor" circuit handshake requests we get,
24373 and how many we complete, and log it every hour to help relay
24374 operators follow trends in network load. Addresses ticket 9658.
24375 - Update to the August 7 2013 Maxmind GeoLite Country database.
24378 Changes in version 0.2.4.16-rc - 2013-08-10
24379 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
24380 series. It fixes several crash bugs in the 0.2.4 branch.
24383 - Fix a bug in the voting algorithm that could yield incorrect results
24384 when a non-naming authority declared too many flags. Fixes bug 9200;
24385 bugfix on 0.2.0.3-alpha.
24386 - Fix an uninitialized read that could in some cases lead to a remote
24387 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
24388 Anybody running a hidden service on the experimental 0.2.4.x
24389 branch should upgrade. (This is, so far as we know, unrelated to
24391 - Avoid an assertion failure when processing DNS replies without the
24392 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
24393 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
24394 0.2.4.15-rc. Found by stem integration tests.
24397 - Fix an invalid memory read that occurred when a pluggable
24398 transport proxy failed its configuration protocol.
24399 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
24400 - When evaluating whether to use a connection that we haven't
24401 decided is canonical using a recent link protocol version,
24402 decide that it's canonical only if it used address _does_
24403 match the desired address. Fixes bug 9309; bugfix on
24404 0.2.4.4-alpha. Reported by skruffy.
24405 - Make the default behavior of NumDirectoryGuards be to track
24406 NumEntryGuards. Now a user who changes only NumEntryGuards will get
24407 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
24408 - Fix a spurious compilation warning with some older versions of
24409 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
24412 - Update to the July 3 2013 Maxmind GeoLite Country database.
24415 Changes in version 0.2.4.15-rc - 2013-07-01
24416 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
24417 series. It fixes a few smaller bugs, but generally appears stable.
24418 Please test it and let us know whether it is!
24421 - When receiving a new configuration file via the control port's
24422 LOADCONF command, do not treat the defaults file as absent.
24423 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
24426 - Issue a warning when running with the bufferevents backend enabled.
24427 It's still not stable, and people should know that they're likely
24428 to hit unexpected problems. Closes ticket 9147.
24431 Changes in version 0.2.4.14-alpha - 2013-06-18
24432 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
24433 present in 0.2.4.13-alpha.
24436 - When we have too much memory queued in circuits (according to a new
24437 MaxMemInCellQueues option), close the circuits consuming the most
24438 memory. This prevents us from running out of memory as a relay if
24439 circuits fill up faster than they can be drained. Fixes bug 9063;
24440 bugfix on the 54th commit of Tor. This bug is a further fix beyond
24441 bug 6252, whose fix was merged into 0.2.3.21-rc.
24443 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
24444 where we tried to solve this issue simply by imposing an upper limit
24445 on the number of queued cells for a single circuit. That approach
24446 proved to be problematic, since there are ways to provoke clients to
24447 send a number of cells in excess of any such reasonable limit. Fixes
24448 bug 9072; bugfix on 0.2.4.13-alpha.
24450 - Limit hidden service descriptors to at most ten introduction
24451 points, to slow one kind of guard enumeration. Fixes bug 9002;
24452 bugfix on 0.1.1.11-alpha.
24455 Changes in version 0.2.4.13-alpha - 2013-06-14
24456 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
24457 vulnerabilities, makes socks5 username/password circuit isolation
24458 actually actually work (this time for sure!), and cleans up a bunch
24459 of other issues in preparation for a release candidate.
24461 o Major bugfixes (robustness):
24462 - Close any circuit that has too many cells queued on it. Fixes
24463 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
24464 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
24465 - Prevent the get_freelists() function from running off the end of
24466 the list of freelists if it somehow gets an unrecognized
24467 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
24469 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
24470 when an exit connection with optimistic data succeeds immediately
24471 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
24473 - Fix a directory authority crash bug when building a consensus
24474 using an older consensus as its basis. Fixes bug 8833. Bugfix
24478 - Avoid a memory leak where we would leak a consensus body when we
24479 find that a consensus which we couldn't previously verify due to
24480 missing certificates is now verifiable. Fixes bug 8719; bugfix
24482 - We used to always request authority certificates by identity digest,
24483 meaning we'd get the newest one even when we wanted one with a
24484 different signing key. Then we would complain about being given
24485 a certificate we already had, and never get the one we really
24486 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
24487 resource to request the one we want. Fixes bug 5595; bugfix on
24489 - Follow the socks5 protocol when offering username/password
24490 authentication. The fix for bug 8117 exposed this bug, and it
24491 turns out real-world applications like Pidgin do care. Bugfix on
24492 0.2.3.2-alpha; fixes bug 8879.
24493 - Prevent failures on Windows Vista and later when rebuilding the
24494 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
24495 bugfix on 0.2.4.12-alpha.
24498 - Fix an impossible buffer overrun in the AES unit tests. Fixes
24499 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
24500 - If for some reason we fail to write a microdescriptor while
24501 rebuilding the cache, do not let the annotations from that
24502 microdescriptor linger in the cache file, and do not let the
24503 microdescriptor stay recorded as present in its old location.
24504 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
24505 - Fix a memory leak that would occur whenever a configuration
24506 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
24507 - Paste the description for PathBias parameters from the man
24508 page into or.h, so the code documents them too. Fixes bug 7982;
24509 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
24510 - Relays now treat a changed IPv6 ORPort as sufficient reason to
24511 publish an updated descriptor. Fixes bug 6026; bugfix on
24513 - When launching a resolve request on behalf of an AF_UNIX control
24514 socket, omit the address field of the new entry connection, used in
24515 subsequent controller events, rather than letting tor_dup_addr()
24516 set it to "<unknown address type>". Fixes bug 8639; bugfix on
24519 o Minor bugfixes (log messages):
24520 - Fix a scaling issue in the path bias accounting code that
24521 resulted in "Bug:" log messages from either
24522 pathbias_scale_close_rates() or pathbias_count_build_success().
24523 This represents a bugfix on a previous bugfix: the original fix
24524 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
24526 - Give a less useless error message when the user asks for an IPv4
24527 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
24531 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
24532 to tolerate bug 8093 for now.
24533 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
24534 in directory authority votes to describe whether they have enough
24535 measured bandwidths to ignore advertised (relay descriptor)
24536 bandwidth claims. Resolves ticket 8711.
24537 - Update to the June 5 2013 Maxmind GeoLite Country database.
24539 o Removed documentation:
24540 - Remove some of the older contents of doc/ as obsolete; move others
24541 to torspec.git. Fixes bug 8965.
24543 o Code simplification and refactoring:
24544 - Avoid using character buffers when constructing most directory
24545 objects: this approach was unwieldy and error-prone. Instead,
24546 build smartlists of strings, and concatenate them when done.
24549 Changes in version 0.2.4.12-alpha - 2013-04-18
24550 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
24551 process for lengthening the guard rotation period, makes directory
24552 authority opinions in the consensus a bit less gameable, makes socks5
24553 username/password circuit isolation actually work, and fixes a wide
24554 variety of other issues.
24557 - Raise the default time that a client keeps an entry guard from
24558 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
24559 2012 paper. (We would make it even longer, but we need better client
24560 load balancing first.) Also, make the guard lifetime controllable
24561 via a new GuardLifetime torrc option and a GuardLifetime consensus
24562 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
24563 - Directory authorities now prefer using measured bandwidths to
24564 advertised ones when computing flags and thresholds. Resolves
24566 - Directory authorities that have more than a threshold number
24567 of relays with measured bandwidths now treat relays with unmeasured
24568 bandwidths as having bandwidth 0. Resolves ticket 8435.
24570 o Major bugfixes (assert / resource use):
24571 - Avoid a bug where our response to TLS renegotiation under certain
24572 network conditions could lead to a busy-loop, with 100% CPU
24573 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
24574 - Avoid an assertion when we discover that we'd like to write a cell
24575 onto a closing connection: just discard the cell. Fixes another
24576 case of bug 7350; bugfix on 0.2.4.4-alpha.
24578 o Major bugfixes (client-side privacy):
24579 - When we mark a circuit as unusable for new circuits, have it
24580 continue to be unusable for new circuits even if MaxCircuitDirtiness
24581 is increased too much at the wrong time, or the system clock jumps
24582 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
24583 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
24584 which have resolved to internal addresses") is set, apply that
24585 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
24586 - When an exit relay rejects a stream with reason "exit policy", but
24587 we only know an exit policy summary (e.g. from the microdesc
24588 consensus) for it, do not mark the relay as useless for all exiting.
24589 Instead, mark just the circuit as unsuitable for that particular
24590 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
24591 - Allow applications to get proper stream isolation with
24592 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
24593 username/password authentication also offer "no authentication". Tor
24594 had previously preferred "no authentication", so the applications
24595 never actually sent Tor their auth details. Now Tor selects
24596 username/password authentication if it's offered. You can disable
24597 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
24598 bug 8117; bugfix on 0.2.3.3-alpha.
24600 o Major bugfixes (other):
24601 - When unable to find any working directory nodes to use as a
24602 directory guard, give up rather than adding the same non-working
24603 nodes to the directory guard list over and over. Fixes bug 8231;
24604 bugfix on 0.2.4.8-alpha.
24607 - Reject as invalid most directory objects containing a NUL.
24608 Belt-and-suspender fix for bug 8037.
24609 - In our testsuite, create temporary directories with a bit more
24610 entropy in their name to make name collisions less likely. Fixes
24612 - Add CACHED keyword to ADDRMAP events in the control protocol
24613 to indicate whether a DNS result will be cached or not. Resolves
24615 - Update to the April 3 2013 Maxmind GeoLite Country database.
24617 o Minor features (build):
24618 - Detect and reject attempts to build Tor with threading support
24619 when OpenSSL has been compiled without threading support.
24621 - Clarify that when autoconf is checking for nacl, it is checking
24622 specifically for nacl with a fast curve25519 implementation.
24624 - Warn if building on a platform with an unsigned time_t: there
24625 are too many places where Tor currently assumes that time_t can
24626 hold negative values. We'd like to fix them all, but probably
24629 o Minor bugfixes (build):
24630 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
24631 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
24632 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
24633 - Add the old src/or/micro-revision.i filename to CLEANFILES.
24634 On the off chance that somebody has one, it will go away as soon
24635 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
24636 - Build Tor correctly on 32-bit platforms where the compiler can build
24637 but not run code using the "uint128_t" construction. Fixes bug 8587;
24638 bugfix on 0.2.4.8-alpha.
24639 - Fix compilation warning with some versions of clang that would
24640 prefer the -Wswitch-enum compiler flag to warn about switch
24641 statements with missing enum values, even if those switch
24642 statements have a "default:" statement. Fixes bug 8598; bugfix
24645 o Minor bugfixes (protocol):
24646 - Fix the handling of a TRUNCATE cell when it arrives while the
24647 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
24648 - Fix a misframing issue when reading the version numbers in a
24649 VERSIONS cell. Previously we would recognize [00 01 00 02] as
24650 'version 1, version 2, and version 0x100', when it should have
24651 only included versions 1 and 2. Fixes bug 8059; bugfix on
24652 0.2.0.10-alpha. Reported pseudonymously.
24653 - Make the format and order of STREAM events for DNS lookups
24654 consistent among the various ways to launch DNS lookups. Fixes
24655 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
24656 - Correct our check for which versions of Tor support the EXTEND2
24657 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
24658 later, when support was really added in version 0.2.4.8-alpha.
24659 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
24661 o Minor bugfixes (other):
24662 - Correctly store microdescriptors and extrainfo descriptors with
24663 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
24664 Bug reported by "cypherpunks".
24665 - Increase the width of the field used to remember a connection's
24666 link protocol version to two bytes. Harmless for now, since the
24667 only currently recognized versions are one byte long. Reported
24668 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
24669 - If the state file's path bias counts are invalid (presumably from a
24670 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
24671 additional checks and log messages to the scaling of Path Bias
24672 counts, in case there still are remaining issues with scaling.
24673 Should help resolve bug 8235.
24674 - Eliminate several instances where we use "Nickname=ID" to refer to
24675 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
24676 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
24677 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
24679 o Minor bugfixes (syscalls):
24680 - Always check the return values of functions fcntl() and
24681 setsockopt(). We don't believe these are ever actually failing in
24682 practice, but better safe than sorry. Also, checking these return
24683 values should please analysis tools like Coverity. Patch from
24684 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
24685 - Use direct writes rather than stdio when building microdescriptor
24686 caches, in an attempt to mitigate bug 8031, or at least make it
24689 o Minor bugfixes (config):
24690 - When rejecting a configuration because we were unable to parse a
24691 quoted string, log an actual error message. Fixes bug 7950; bugfix
24693 - Behave correctly when the user disables LearnCircuitBuildTimeout
24694 but doesn't tell us what they would like the timeout to be. Fixes
24695 bug 6304; bugfix on 0.2.2.14-alpha.
24696 - When autodetecting the number of CPUs, use the number of available
24697 CPUs in preference to the number of configured CPUs. Inform the
24698 user if this reduces the number of available CPUs. Fixes bug 8002;
24699 bugfix on 0.2.3.1-alpha.
24700 - Make it an error when you set EntryNodes but disable UseGuardNodes,
24701 since it will (surprisingly to some users) ignore EntryNodes. Fixes
24702 bug 8180; bugfix on 0.2.3.11-alpha.
24703 - Allow TestingTorNetworks to override the 4096-byte minimum for
24704 the Fast threshold. Otherwise they can't bootstrap until they've
24705 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
24706 - Fix some logic errors when the user manually overrides the
24707 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
24710 o Minor bugfixes (log messages to help diagnose bugs):
24711 - If we fail to free a microdescriptor because of bug 7164, log
24712 the filename and line number from which we tried to free it.
24713 - Add another diagnostic to the heartbeat message: track and log
24714 overhead that TLS is adding to the data we write. If this is
24715 high, we are sending too little data to SSL_write at a time.
24716 Diagnostic for bug 7707.
24717 - Add more detail to a log message about relaxed timeouts, to help
24719 - Warn more aggressively when flushing microdescriptors to a
24720 microdescriptor cache fails, in an attempt to mitigate bug 8031,
24721 or at least make it more diagnosable.
24722 - Improve debugging output to help track down bug 8185 ("Bug:
24723 outgoing relay cell has n_chan==NULL. Dropping.")
24724 - Log the purpose of a path-bias testing circuit correctly.
24725 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
24727 o Minor bugfixes (0.2.4.x log messages that were too noisy):
24728 - Don't attempt to relax the timeout of already opened 1-hop circuits.
24729 They might never timeout. This should eliminate some/all cases of
24730 the relaxed timeout log message.
24731 - Use circuit creation time for network liveness evaluation. This
24732 should eliminate warning log messages about liveness caused
24733 by changes in timeout evaluation. Fixes bug 6572; bugfix on
24735 - Reduce a path bias length check from notice to info. The message
24736 is triggered when creating controller circuits. Fixes bug 8196;
24737 bugfix on 0.2.4.8-alpha.
24738 - Fix a path state issue that triggered a notice during relay startup.
24739 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
24740 - Reduce occurrences of warns about circuit purpose in
24741 connection_ap_expire_building(). Fixes bug 8477; bugfix on
24744 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
24745 - If we encounter a write failure on a SOCKS connection before we
24746 finish our SOCKS handshake, don't warn that we closed the
24747 connection before we could send a SOCKS reply. Fixes bug 8427;
24748 bugfix on 0.1.0.1-rc.
24749 - Correctly recognize that [::1] is a loopback address. Fixes
24750 bug 8377; bugfix on 0.2.1.3-alpha.
24751 - Fix a directory authority warn caused when we have a large amount
24752 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
24753 - Don't log inappropriate heartbeat messages when hibernating: a
24754 hibernating node is _expected_ to drop out of the consensus,
24755 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
24756 bugfix on 0.2.3.1-alpha.
24757 - Don't complain about bootstrapping problems while hibernating.
24758 These complaints reflect a general code problem, but not one
24759 with any problematic effects (no connections are actually
24760 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
24762 o Documentation fixes:
24763 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
24764 names match. Fixes bug 7768.
24765 - Make the torify manpage no longer refer to tsocks; torify hasn't
24766 supported tsocks since 0.2.3.14-alpha.
24767 - Make the tor manpage no longer reference tsocks.
24768 - Fix the GeoIPExcludeUnknown documentation to refer to
24769 ExcludeExitNodes rather than the currently nonexistent
24770 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
24773 - The tor-tsocks.conf is no longer distributed or installed. We
24774 recommend that tsocks users use torsocks instead. Resolves
24778 Changes in version 0.2.4.11-alpha - 2013-03-11
24779 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
24780 more robust, makes hidden service authentication work again, and
24781 resolves a DPI fingerprint for Tor's SSL transport.
24783 o Major features (directory authorities):
24784 - Directory authorities now support a new consensus method (17)
24785 where they cap the published bandwidth of servers for which
24786 insufficient bandwidth measurements exist. Fixes part of bug 2286.
24787 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
24788 serve any v2 directory information. Now we can test disabling the
24789 old deprecated v2 directory format, and see whether doing so has
24790 any effect on network load. Begins to fix bug 6783.
24791 - Directory authorities now include inside each vote a statement of
24792 the performance thresholds they used when assigning flags.
24793 Implements ticket 8151.
24795 o Major bugfixes (directory authorities):
24796 - Stop marking every relay as having been down for one hour every
24797 time we restart a directory authority. These artificial downtimes
24798 were messing with our Stable and Guard flag calculations. Fixes
24799 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
24801 o Major bugfixes (hidden services):
24802 - Allow hidden service authentication to succeed again. When we
24803 refactored the hidden service introduction code back
24804 in 0.2.4.1-alpha, we didn't update the code that checks
24805 whether authentication information is present, causing all
24806 authentication checks to return "false". Fix for bug 8207; bugfix
24807 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
24809 o Minor features (relays, bridges):
24810 - Make bridge relays check once a minute for whether their IP
24811 address has changed, rather than only every 15 minutes. Resolves
24812 bugs 1913 and 1992.
24813 - Refactor resolve_my_address() so it returns the method by which we
24814 decided our public IP address (explicitly configured, resolved from
24815 explicit hostname, guessed from interfaces, learned by gethostname).
24816 Now we can provide more helpful log messages when a relay guesses
24817 its IP address incorrectly (e.g. due to unexpected lines in
24818 /etc/hosts). Resolves ticket 2267.
24819 - Teach bridge-using clients to avoid 0.2.2 bridges when making
24820 microdescriptor-related dir requests, and only fall back to normal
24821 descriptors if none of their bridges can handle microdescriptors
24822 (as opposed to the fix in ticket 4013, which caused them to fall
24823 back to normal descriptors if *any* of their bridges preferred
24824 them). Resolves ticket 4994.
24825 - Randomize the lifetime of our SSL link certificate, so censors can't
24826 use the static value for filtering Tor flows. Resolves ticket 8443;
24827 related to ticket 4014 which was included in 0.2.2.33.
24828 - Support a new version of the link protocol that allows 4-byte circuit
24829 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
24830 a possible resource exhaustion issue. Closes ticket 7351; implements
24833 o Minor features (portability):
24834 - Tweak the curve25519-donna*.c implementations to tolerate systems
24835 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
24836 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
24837 the signs of types during autoconf. This is better than our old
24838 approach, which didn't work when cross-compiling.
24839 - Detect the sign of enum values, rather than assuming that MSC is the
24840 only compiler where enum types are all signed. Fixes bug 7727;
24841 bugfix on 0.2.4.10-alpha.
24843 o Minor features (other):
24844 - Say "KBytes" rather than "KB" in the man page (for various values
24845 of K), to further reduce confusion about whether Tor counts in
24846 units of memory or fractions of units of memory. Resolves ticket 7054.
24847 - Clear the high bit on curve25519 public keys before passing them to
24848 our backend, in case we ever wind up using a backend that doesn't do
24849 so itself. If we used such a backend, and *didn't* clear the high bit,
24850 we could wind up in a situation where users with such backends would
24851 be distinguishable from users without. Fixes bug 8121; bugfix on
24853 - Update to the March 6 2013 Maxmind GeoLite Country database.
24855 o Minor bugfixes (clients):
24856 - When we receive a RELAY_END cell with the reason DONE, or with no
24857 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
24858 status as "connection refused". Previously we reported these cases
24859 as success but then immediately closed the connection. Fixes bug
24860 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
24861 - Downgrade an assertion in connection_ap_expire_beginning to an
24862 LD_BUG message. The fix for bug 8024 should prevent this message
24863 from displaying, but just in case, a warn that we can diagnose
24864 is better than more assert crashes. Fixes bug 8065; bugfix on
24866 - Lower path use bias thresholds to .80 for notice and .60 for warn.
24867 Also make the rate limiting flags for the path use bias log messages
24868 independent from the original path bias flags. Fixes bug 8161;
24869 bugfix on 0.2.4.10-alpha.
24871 o Minor bugfixes (relays):
24872 - Stop trying to resolve our hostname so often (e.g. every time we
24873 think about doing a directory fetch). Now we reuse the cached
24874 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
24875 and 2410 (bugfix on 0.1.2.2-alpha).
24876 - Stop sending a stray "(null)" in some cases for the server status
24877 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
24879 - When choosing which stream on a formerly stalled circuit to wake
24880 first, make better use of the platform's weak RNG. Previously,
24881 we had been using the % ("modulo") operator to try to generate a
24882 1/N chance of picking each stream, but this behaves badly with
24883 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
24885 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
24886 Irix's random() only return 15 bits; Solaris's random() returns more
24887 bits but its RAND_MAX says it only returns 15, and so on. Motivated
24888 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
24890 o Minor bugfixes (directory authorities):
24891 - Directory authorities now use less space when formatting identical
24892 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
24895 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
24896 - Avoid leaking memory if we fail to compute a consensus signature
24897 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
24898 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
24900 - Fix a memory leak during safe-cookie controller authentication.
24901 Bugfix on 0.2.3.13-alpha.
24902 - Avoid memory leak of IPv6 policy content if we fail to format it into
24903 a router descriptor. Bugfix on 0.2.4.7-alpha.
24905 o Minor bugfixes (other code correctness issues):
24906 - Avoid a crash if we fail to generate an extrainfo descriptor.
24907 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
24908 this is CID 718634.
24909 - When detecting the largest possible file descriptor (in order to
24910 close all file descriptors when launching a new program), actually
24911 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
24912 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
24914 - Fix a copy-and-paste error when adding a missing A1 to a routerset
24915 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
24916 Bugfix on 0.2.4.10-alpha.
24917 - Fix an impossible-to-trigger integer overflow when estimating how
24918 long our onionskin queue would take. (This overflow would require us
24919 to accept 4 million onionskins before processing 100 of them.) Fixes
24920 bug 8210; bugfix on 0.2.4.10-alpha.
24922 o Code simplification and refactoring:
24923 - Add a wrapper function for the common "log a message with a
24927 Changes in version 0.2.4.10-alpha - 2013-02-04
24928 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
24929 certain attacks that flood the network with relays; changes the queue
24930 for circuit create requests from a sized-based limit to a time-based
24931 limit; resumes building with MSVC on Windows; and fixes a wide variety
24934 o Major bugfixes (directory authority):
24935 - When computing directory thresholds, ignore any rejected-as-sybil
24936 nodes during the computation so that they can't influence Fast,
24937 Guard, etc. (We should have done this for proposal 109.) Fixes
24939 - When marking a node as a likely sybil, reset its uptime metrics
24940 to zero, so that it cannot time towards getting marked as Guard,
24941 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
24945 - When a TLS write is partially successful but incomplete, remember
24946 that the flushed part has been flushed, and notice that bytes were
24947 actually written. Reported and fixed pseudonymously. Fixes bug
24948 7708; bugfix on Tor 0.1.0.5-rc.
24949 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
24950 ID: these could be used to create unexpected streams and circuits
24951 which would count as "present" to some parts of Tor but "absent"
24952 to others, leading to zombie circuits and streams or to a bandwidth
24953 denial-of-service. Fixes bug 7889; bugfix on every released version
24954 of Tor. Reported by "oftc_must_be_destroyed".
24955 - Rename all macros in our local copy of queue.h to begin with "TOR_".
24956 This change seems the only good way to permanently prevent conflicts
24957 with queue.h on various operating systems. Fixes bug 8107; bugfix
24960 o Major features (relay):
24961 - Instead of limiting the number of queued onionskins (aka circuit
24962 create requests) to a fixed, hard-to-configure number, we limit
24963 the size of the queue based on how many we expect to be able to
24964 process in a given amount of time. We estimate the time it will
24965 take to process an onionskin based on average processing time
24966 of previous onionskins. Closes ticket 7291. You'll never have to
24967 configure MaxOnionsPending again.
24969 o Major features (portability):
24970 - Resume building correctly with MSVC and Makefile.nmake. This patch
24971 resolves numerous bugs and fixes reported by ultramage, including
24972 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
24973 - Make the ntor and curve25519 code build correctly with MSVC.
24974 Fix on 0.2.4.8-alpha.
24977 - When directory authorities are computing thresholds for flags,
24978 never let the threshold for the Fast flag fall below 4096
24979 bytes. Also, do not consider nodes with extremely low bandwidths
24980 when deciding thresholds for various directory flags. This change
24981 should raise our threshold for Fast relays, possibly in turn
24982 improving overall network performance; see ticket 1854. Resolves
24984 - The Tor client now ignores sub-domain components of a .onion
24985 address. This change makes HTTP "virtual" hosting
24986 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
24987 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
24988 hosted on the same hidden service. Implements proposal 204.
24989 - We compute the overhead from passing onionskins back and forth to
24990 cpuworkers, and report it when dumping statistics in response to
24991 SIGUSR1. Supports ticket 7291.
24993 o Minor features (path selection):
24994 - When deciding whether we have enough descriptors to build circuits,
24995 instead of looking at raw relay counts, look at which fraction
24996 of (bandwidth-weighted) paths we're able to build. This approach
24997 keeps clients from building circuits if their paths are likely to
24998 stand out statistically. The default fraction of paths needed is
24999 taken from the consensus directory; you can override it with the
25000 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
25001 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
25002 and we have GeoIP information, also exclude all nodes with unknown
25003 countries "??" and "A1". This behavior is controlled by the
25004 new GeoIPExcludeUnknown option: you can make such nodes always
25005 excluded with "GeoIPExcludeUnknown 1", and disable the feature
25006 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
25007 gets you the default behavior. Implements feature 7706.
25008 - Path Use Bias: Perform separate accounting for successful circuit
25009 use. Keep separate statistics on stream attempt rates versus stream
25010 success rates for each guard. Provide configurable thresholds to
25011 determine when to emit log messages or disable use of guards that
25012 fail too many stream attempts. Resolves ticket 7802.
25014 o Minor features (log messages):
25015 - When learning a fingerprint for a bridge, log its corresponding
25016 transport type. Implements ticket 7896.
25017 - Improve the log message when "Bug/attack: unexpected sendme cell
25018 from client" occurs, to help us track bug 8093.
25021 - Remove a couple of extraneous semicolons that were upsetting the
25022 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
25023 bugfix on 0.2.2.1-alpha.
25024 - Remove a source of rounding error during path bias count scaling;
25025 don't count cannibalized circuits as used for path bias until we
25026 actually try to use them; and fix a circuit_package_relay_cell()
25027 warning message about n_chan==NULL. Fixes bug 7802.
25028 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
25029 actually link against nacl when we're configured to use it. Fixes
25030 bug 7972; bugfix on 0.2.4.8-alpha.
25031 - Compile correctly with the --disable-curve25519 option. Fixes
25032 bug 8153; bugfix on 0.2.4.8-alpha.
25034 o Build improvements:
25035 - Do not report status verbosely from autogen.sh unless the -v flag
25036 is specified. Fixes issue 4664. Patch from Onizuka.
25037 - Replace all calls to snprintf() outside of src/ext with
25038 tor_snprintf(). Also remove the #define to replace snprintf with
25039 _snprintf on Windows; they have different semantics, and all of
25040 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
25041 - Try to detect if we are ever building on a platform where
25042 memset(...,0,...) does not set the value of a double to 0.0. Such
25043 platforms are permitted by the C standard, though in practice
25044 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
25045 currently support them, but it's better to detect them and fail
25046 than to perform erroneously.
25048 o Removed features:
25049 - Stop exporting estimates of v2 and v3 directory traffic shares
25050 in extrainfo documents. They were unneeded and sometimes inaccurate.
25051 Also stop exporting any v2 directory request statistics. Resolves
25053 - Drop support for detecting and warning about versions of Libevent
25054 before 1.3e. Nothing reasonable ships with them any longer;
25055 warning the user about them shouldn't be needed. Resolves ticket
25058 o Code simplifications and refactoring:
25059 - Rename "isin" functions to "contains", for grammar. Resolves
25061 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
25062 with the natural logarithm function from the system libm. Resolves
25066 Changes in version 0.2.4.9-alpha - 2013-01-15
25067 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
25068 work more robustly.
25071 - Fix backward compatibility logic when receiving an embedded ntor
25072 handshake tunneled in a CREATE cell. This clears up the "Bug:
25073 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
25077 Changes in version 0.2.4.8-alpha - 2013-01-14
25078 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
25079 risks, adds a new stronger and faster circuit handshake, and offers
25080 stronger and faster link encryption when both sides support it.
25083 - Preliminary support for directory guards (proposal 207): when
25084 possible, clients now use their entry guards for non-anonymous
25085 directory requests. This can help prevent client enumeration. Note
25086 that this behavior only works when we have a usable consensus
25087 directory, and when options about what to download are more or less
25088 standard. In the future we should re-bootstrap from our guards,
25089 rather than re-bootstrapping from the preconfigured list of
25090 directory sources that ships with Tor. Resolves ticket 6526.
25091 - Tor relays and clients now support a better CREATE/EXTEND cell
25092 format, allowing the sender to specify multiple address, identity,
25093 and handshake types. Implements Robert Ransom's proposal 200;
25094 closes ticket 7199.
25096 o Major features (new circuit handshake):
25097 - Tor now supports a new circuit extension handshake designed by Ian
25098 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
25099 circuit extension handshake, later called "TAP", was a bit slow
25100 (especially on the relay side), had a fragile security proof, and
25101 used weaker keys than we'd now prefer. The new circuit handshake
25102 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
25103 function, making it significantly more secure than the older
25104 handshake, and significantly faster. Tor can use one of two built-in
25105 pure-C curve25519-donna implementations by Adam Langley, or it
25106 can link against the "nacl" library for a tuned version if present.
25108 The built-in version is very fast for 64-bit systems when building
25109 with GCC. The built-in 32-bit version is still faster than the
25110 old TAP protocol, but using libnacl is better on most such hosts.
25112 Clients don't currently use this protocol by default, since
25113 comparatively few clients support it so far. To try it, set
25114 UseNTorHandshake to 1.
25116 Implements proposal 216; closes ticket 7202.
25118 o Major features (better link encryption):
25119 - Relays can now enable the ECDHE TLS ciphersuites when available
25120 and appropriate. These ciphersuites let us negotiate forward-secure
25121 TLS secret keys more safely and more efficiently than with our
25122 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
25123 public relays prefer the (faster) P224 group, and bridges prefer
25124 the (more common) P256 group; you can override this with the
25127 Enabling these ciphers was a little tricky, since for a long time,
25128 clients had been claiming to support them without actually doing
25129 so, in order to foil fingerprinting. But with the client-side
25130 implementation of proposal 198 in 0.2.3.17-beta, clients can now
25131 match the ciphers from recent Firefox versions *and* list the
25132 ciphers they actually mean, so relays can believe such clients
25133 when they advertise ECDHE support in their TLS ClientHello messages.
25135 This feature requires clients running 0.2.3.17-beta or later,
25136 and requires both sides to be running OpenSSL 1.0.0 or later
25137 with ECC support. OpenSSL 1.0.1, with the compile-time option
25138 "enable-ec_nistp_64_gcc_128", is highly recommended.
25140 Implements the relay side of proposal 198; closes ticket 7200.
25143 - Avoid crashing when, as a relay without IPv6-exit support, a
25144 client insists on getting an IPv6 address or nothing. Fixes bug
25145 7814; bugfix on 0.2.4.7-alpha.
25148 - Improve circuit build timeout handling for hidden services.
25149 In particular: adjust build timeouts more accurately depending
25150 upon the number of hop-RTTs that a particular circuit type
25151 undergoes. Additionally, launch intro circuits in parallel
25152 if they timeout, and take the first one to reply as valid.
25153 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
25154 separate error codes; or at least, don't break for that reason.
25155 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
25156 - Update to the January 2 2013 Maxmind GeoLite Country database.
25158 o Minor features (testing):
25159 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
25160 (P-256) Diffie-Hellman handshakes to src/or/bench.
25161 - Add benchmark functions to test onion handshake performance.
25163 o Minor features (path bias detection):
25164 - Alter the Path Bias log messages to be more descriptive in terms
25165 of reporting timeouts and other statistics.
25166 - Create three levels of Path Bias log messages, as opposed to just
25167 two. These are configurable via consensus as well as via the torrc
25168 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
25169 The default values are 0.70, 0.50, and 0.30 respectively.
25170 - Separate the log message levels from the decision to drop guards,
25171 which also is available via torrc option PathBiasDropGuards.
25172 PathBiasDropGuards still defaults to 0 (off).
25173 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
25174 in combination with PathBiasExtremeRate.
25175 - Increase the default values for PathBiasScaleThreshold and
25176 PathBiasCircThreshold from (200, 20) to (300, 150).
25177 - Add in circuit usage accounting to path bias. If we try to use a
25178 built circuit but fail for any reason, it counts as path bias.
25179 Certain classes of circuits where the adversary gets to pick your
25180 destination node are exempt from this accounting. Usage accounting
25181 can be specifically disabled via consensus parameter or torrc.
25182 - Convert all internal path bias state to double-precision floating
25183 point, to avoid roundoff error and other issues.
25184 - Only record path bias information for circuits that have completed
25185 *two* hops. Assuming end-to-end tagging is the attack vector, this
25186 makes us more resilient to ambient circuit failure without any
25187 detection capability loss.
25189 o Minor bugfixes (log messages):
25190 - Rate-limit the "No circuits are opened. Relaxed timeout for a
25191 circuit with channel state open..." message to once per hour to
25192 keep it from filling the notice logs. Mitigates bug 7799 but does
25193 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
25194 - Avoid spurious warnings when configuring multiple client ports of
25195 which only some are nonlocal. Previously, we had claimed that some
25196 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
25199 o Code simplifications and refactoring:
25200 - Get rid of a couple of harmless clang warnings, where we compared
25201 enums to ints. These warnings are newly introduced in clang 3.2.
25202 - Split the onion.c file into separate modules for the onion queue
25203 and the different handshakes it supports.
25204 - Remove the marshalling/unmarshalling code for sending requests to
25205 cpuworkers over a socket, and instead just send structs. The
25206 recipient will always be the same Tor binary as the sender, so
25207 any encoding is overkill.
25210 Changes in version 0.2.4.7-alpha - 2012-12-24
25211 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
25212 directory mirrors for more robust bootstrapping; fixes more issues where
25213 clients with changing network conditions refuse to make any circuits;
25214 adds initial support for exiting to IPv6 addresses; resumes being able
25215 to update our GeoIP database, and includes the geoip6 file this time;
25216 turns off the client-side DNS cache by default due to privacy risks;
25217 and fixes a variety of other issues.
25219 o Major features (client resilience):
25220 - Add a new "FallbackDir" torrc option to use when we can't use
25221 a directory mirror from the consensus (either because we lack a
25222 consensus, or because they're all down). Currently, all authorities
25223 are fallbacks by default, and there are no other default fallbacks,
25224 but that will change. This option will allow us to give clients a
25225 longer list of servers to try to get a consensus from when first
25226 connecting to the Tor network, and thereby reduce load on the
25227 directory authorities. Implements proposal 206, "Preconfigured
25228 directory sources for bootstrapping". We also removed the old
25229 "FallbackNetworkstatus" option, since we never got it working well
25230 enough to use it. Closes bug 572.
25231 - If we have no circuits open, use a relaxed timeout (the
25232 95-percentile cutoff) until a circuit succeeds. This heuristic
25233 should allow Tor to succeed at building circuits even when the
25234 network connection drastically changes. Should help with bug 3443.
25236 o Major features (IPv6):
25237 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
25238 connectivity, then set the IPv6Exit flag to 1. Also make sure your
25239 exit policy reads as you would like: the address * applies to all
25240 address families, whereas *4 is IPv4 address only, and *6 is IPv6
25241 addresses only. On the client side, you'll need to wait until the
25242 authorities have upgraded, wait for enough exits to support IPv6,
25243 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
25244 ticket 5547, implements proposal 117 as revised in proposal 208.
25246 We DO NOT recommend that clients with actual anonymity needs start
25247 using IPv6 over Tor yet, since not enough exits support it yet.
25249 o Major features (geoip database):
25250 - Maxmind began labelling Tor relays as being in country "A1",
25251 which breaks by-country node selection inside Tor. Now we use a
25252 script to replace "A1" ("Anonymous Proxy") entries in our geoip
25253 file with real country codes. This script fixes about 90% of "A1"
25254 entries automatically and uses manual country code assignments to
25255 fix the remaining 10%. See src/config/README.geoip for details.
25256 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
25257 Country database, as modified above.
25259 o Major bugfixes (client-side DNS):
25260 - Turn off the client-side DNS cache by default. Updating and using
25261 the DNS cache is now configurable on a per-client-port
25262 level. SOCKSPort, DNSPort, etc lines may now contain
25263 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
25264 cache these types of DNS answers when we receive them from an
25265 exit node in response to an application request on this port, and
25266 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
25267 cached DNS answers of these types, we shouldn't use them. It's
25268 potentially risky to use cached DNS answers at the client, since
25269 doing so can indicate to one exit what answers we've gotten
25270 for DNS lookups in the past. With IPv6, this becomes especially
25271 problematic. Using cached DNS answers for requests on the same
25272 circuit would present less linkability risk, since all traffic
25273 on a circuit is already linkable, but it would also provide
25274 little performance benefit: the exit node caches DNS replies
25275 too. Implements a simplified version of Proposal 205. Implements
25278 o Major bugfixes (other):
25279 - Alter circuit build timeout measurement to start at the point
25280 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
25281 initialization). This should make our timeout measurements more
25282 uniform. Previously, we were sometimes including ORconn setup time
25283 in our circuit build time measurements. Should resolve bug 3443.
25284 - Fix an assertion that could trigger in hibernate_go_dormant() when
25285 closing an or_connection_t: call channel_mark_for_close() rather
25286 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
25288 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
25289 7655; bugfix on 0.2.4.6-alpha.
25292 - Add a new torrc option "ServerTransportListenAddr" to let bridge
25293 operators select the address where their pluggable transports will
25294 listen for connections. Resolves ticket 7013.
25295 - Allow an optional $ before the node identity digest in the
25296 controller command GETINFO ns/id/<identity>, for consistency with
25297 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
25298 - Log packaged cell fullness as part of the heartbeat message.
25299 Diagnosis to try to determine the extent of bug 7743.
25301 o Minor features (IPv6):
25302 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
25303 prefer to hand out virtual IPv6 addresses, since there are more of
25304 them and we can't run out. To override this behavior and make IPv4
25305 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
25306 or DNSPort you're using for resolving. Implements ticket 7571.
25307 - AutomapHostsOnResolve responses are now randomized, to avoid
25308 annoying situations where Tor is restarted and applications
25309 connect to the wrong addresses.
25310 - Never try more than 1000 times to pick a new virtual address when
25311 AutomapHostsOnResolve is set. That's good enough so long as we
25312 aren't close to handing out our entire virtual address space;
25313 if you're getting there, it's best to switch to IPv6 virtual
25317 - The ADDRMAP command can no longer generate an ill-formed error
25318 code on a failed MAPADDRESS. It now says "internal" rather than
25319 an English sentence fragment with spaces in the middle. Bugfix on
25320 Tor 0.2.0.19-alpha.
25321 - Fix log messages and comments to avoid saying "GMT" when we mean
25322 "UTC". Fixes bug 6113.
25323 - Compile on win64 using mingw64. Fixes bug 7260; patches from
25325 - Fix a crash when debugging unit tests on Windows: deallocate a
25326 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
25327 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
25330 - The DirServer option is now DirAuthority, for consistency with
25331 current naming patterns. You can still use the old DirServer form.
25333 o Code simplification and refactoring:
25334 - Move the client-side address-map/virtual-address/DNS-cache code
25335 out of connection_edge.c into a new addressmap.c module.
25336 - Remove unused code for parsing v1 directories and "running routers"
25337 documents. Fixes bug 6887.
25340 Changes in version 0.2.3.25 - 2012-11-19
25341 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
25342 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
25343 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
25344 programmer, and friend. Unstinting in his dedication to the cause of
25345 freedom, he inspired and helped many of us as we began our work on
25346 anonymity, and inspires us still. Please honor his memory by writing
25347 software to protect people's freedoms, and by helping others to do so.
25349 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
25350 significantly reduced directory overhead (via microdescriptors),
25351 enormous crypto performance improvements for fast relays on new
25352 enough hardware, a new v3 TLS handshake protocol that can better
25353 resist fingerprinting, support for protocol obfuscation plugins (aka
25354 pluggable transports), better scalability for hidden services, IPv6
25355 support for bridges, performance improvements like allowing clients
25356 to skip the first round-trip on the circuit ("optimistic data") and
25357 refilling token buckets more often, a new "stream isolation" design
25358 to isolate different applications on different circuits, and many
25359 stability, security, and privacy fixes.
25362 - Tor tries to wipe potentially sensitive data after using it, so
25363 that if some subsequent security failure exposes Tor's memory,
25364 the damage will be limited. But we had a bug where the compiler
25365 was eliminating these wipe operations when it decided that the
25366 memory was no longer visible to a (correctly running) program,
25367 hence defeating our attempt at defense in depth. We fix that
25368 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25369 is unlikely to optimize away. Future versions of Tor may use
25370 a less ridiculously heavy approach for this. Fixes bug 7352.
25371 Reported in an article by Andrey Karpov.
25374 - Fix a harmless bug when opting against publishing a relay descriptor
25375 because DisableNetwork is set. Fixes bug 7464; bugfix on
25379 Changes in version 0.2.4.6-alpha - 2012-11-13
25380 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
25381 makes our defense-in-depth memory wiping more reliable, and begins to
25382 count IPv6 addresses in bridge statistics,
25385 - Fix an assertion failure that could occur when closing a connection
25386 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
25388 - Tor tries to wipe potentially sensitive data after using it, so
25389 that if some subsequent security failure exposes Tor's memory,
25390 the damage will be limited. But we had a bug where the compiler
25391 was eliminating these wipe operations when it decided that the
25392 memory was no longer visible to a (correctly running) program,
25393 hence defeating our attempt at defense in depth. We fix that
25394 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25395 is unlikely to optimize away. Future versions of Tor may use
25396 a less ridiculously heavy approach for this. Fixes bug 7352.
25397 Reported in an article by Andrey Karpov.
25400 - Add GeoIP database for IPv6 addresses. The new config option
25402 - Bridge statistics now count bridge clients connecting over IPv6:
25403 bridge statistics files now list "bridge-ip-versions" and
25404 extra-info documents list "geoip6-db-digest". The control protocol
25405 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
25406 implementation by "shkoo", addressing ticket 5055.
25409 - Warn when we are binding low ports when hibernation is enabled;
25410 previously we had warned when we were _advertising_ low ports with
25411 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
25412 - Fix a harmless bug when opting against publishing a relay descriptor
25413 because DisableNetwork is set. Fixes bug 7464; bugfix on
25415 - Add warning message when a managed proxy dies during configuration.
25416 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
25417 - Fix a linking error when building tor-fw-helper without miniupnp.
25418 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
25419 - Check for closing an or_connection_t without going through correct
25420 channel functions; emit a warning and then call
25421 connection_or_close_for_error() so we don't assert as in bugs 7212
25423 - Compile correctly on compilers without C99 designated initializer
25424 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
25425 - Avoid a possible assert that can occur when channel_send_destroy() is
25426 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
25427 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
25428 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
25429 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
25430 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
25432 o Code simplification and refactoring:
25433 - Start using OpenBSD's implementation of queue.h, so that we don't
25434 need to hand-roll our own pointer and list structures whenever we
25435 need them. (We can't rely on a sys/queue.h, since some operating
25436 systems don't have them, and the ones that do have them don't all
25437 present the same extensions.)
25440 Changes in version 0.2.4.5-alpha - 2012-10-25
25441 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
25442 two important security vulnerabilities that could lead to remotely
25443 triggerable relay crashes, fix a major bug that was preventing clients
25444 from choosing suitable exit nodes, and refactor some of our code.
25446 o Major bugfixes (security, also in 0.2.3.24-rc):
25447 - Fix a group of remotely triggerable assertion failures related to
25448 incorrect link protocol negotiation. Found, diagnosed, and fixed
25449 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25451 - Fix a denial of service attack by which any directory authority
25452 could crash all the others, or by which a single v2 directory
25453 authority could crash everybody downloading v2 directory
25454 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25456 o Major bugfixes (also in 0.2.3.24-rc):
25457 - When parsing exit policy summaries from microdescriptors, we had
25458 previously been ignoring the last character in each one, so that
25459 "accept 80,443,8080" would be treated by clients as indicating
25460 a node that allows access to ports 80, 443, and 808. That would
25461 lead to clients attempting connections that could never work,
25462 and ignoring exit nodes that would support their connections. Now
25463 clients parse these exit policy summaries correctly. Fixes bug 7192;
25464 bugfix on 0.2.3.1-alpha.
25466 o Minor bugfixes (also in 0.2.3.24-rc):
25467 - Clients now consider the ClientRejectInternalAddresses config option
25468 when using a microdescriptor consensus stanza to decide whether
25469 an exit relay would allow exiting to an internal address. Fixes
25470 bug 7190; bugfix on 0.2.3.1-alpha.
25473 - Only disable TLS session ticket support when running as a TLS
25474 server. Now clients will blend better with regular Firefox
25475 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
25477 o Code simplification and refactoring:
25478 - Start using OpenBSD's implementation of queue.h (originally by
25480 - Move the entry node code from circuitbuild.c to its own file.
25481 - Move the circuit build timeout tracking code from circuitbuild.c
25485 Changes in version 0.2.3.24-rc - 2012-10-25
25486 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
25487 could lead to remotely triggerable relay crashes, and fixes
25488 a major bug that was preventing clients from choosing suitable exit
25491 o Major bugfixes (security):
25492 - Fix a group of remotely triggerable assertion failures related to
25493 incorrect link protocol negotiation. Found, diagnosed, and fixed
25494 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25496 - Fix a denial of service attack by which any directory authority
25497 could crash all the others, or by which a single v2 directory
25498 authority could crash everybody downloading v2 directory
25499 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25502 - When parsing exit policy summaries from microdescriptors, we had
25503 previously been ignoring the last character in each one, so that
25504 "accept 80,443,8080" would be treated by clients as indicating
25505 a node that allows access to ports 80, 443, and 808. That would
25506 lead to clients attempting connections that could never work,
25507 and ignoring exit nodes that would support their connections. Now
25508 clients parse these exit policy summaries correctly. Fixes bug 7192;
25509 bugfix on 0.2.3.1-alpha.
25512 - Clients now consider the ClientRejectInternalAddresses config option
25513 when using a microdescriptor consensus stanza to decide whether
25514 an exit relay would allow exiting to an internal address. Fixes
25515 bug 7190; bugfix on 0.2.3.1-alpha.
25518 Changes in version 0.2.4.4-alpha - 2012-10-20
25519 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
25520 vulnerability introduced by a change in OpenSSL, fixes a remotely
25521 triggerable assert, and adds new channel_t and circuitmux_t abstractions
25522 that will make it easier to test new connection transport and cell
25523 scheduling algorithms.
25525 o New directory authorities (also in 0.2.3.23-rc):
25526 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25527 authority. Closes ticket 5749.
25529 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
25530 - Disable TLS session tickets. OpenSSL's implementation was giving
25531 our TLS session keys the lifetime of our TLS context objects, when
25532 perfect forward secrecy would want us to discard anything that
25533 could decrypt a link connection as soon as the link connection
25534 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25535 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25536 - Discard extraneous renegotiation attempts once the V3 link
25537 protocol has been initiated. Failure to do so left us open to
25538 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25539 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25541 o Internal abstraction features:
25542 - Introduce new channel_t abstraction between circuits and
25543 or_connection_t to allow for implementing alternate OR-to-OR
25544 transports. A channel_t is an abstract object which can either be a
25545 cell-bearing channel, which is responsible for authenticating and
25546 handshaking with the remote OR and transmitting cells to and from
25547 it, or a listening channel, which spawns new cell-bearing channels
25548 at the request of remote ORs. Implements part of ticket 6465.
25549 - Also new is the channel_tls_t subclass of channel_t, adapting it
25550 to the existing or_connection_t code. The V2/V3 protocol handshaking
25551 code which formerly resided in command.c has been moved below the
25552 channel_t abstraction layer and may be found in channeltls.c now.
25553 Implements the rest of ticket 6465.
25554 - Introduce new circuitmux_t storing the queue of circuits for
25555 a channel; this encapsulates and abstracts the queue logic and
25556 circuit selection policy, and allows the latter to be overridden
25557 easily by switching out a policy object. The existing EWMA behavior
25558 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
25560 o Required libraries:
25561 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
25562 strongly recommended.
25565 - Warn users who run hidden services on a Tor client with
25566 UseEntryGuards disabled that their hidden services will be
25567 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
25568 attack which motivated Tor to support entry guards in the first
25569 place). Resolves ticket 6889.
25570 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
25571 dhill. Resolves ticket 6982.
25572 - Option OutboundBindAddress can be specified multiple times and
25573 accepts IPv6 addresses. Resolves ticket 6876.
25575 o Minor bugfixes (also in 0.2.3.23-rc):
25576 - Don't serve or accept v2 hidden service descriptors over a
25577 relay's DirPort. It's never correct to do so, and disabling it
25578 might make it more annoying to exploit any bugs that turn up in the
25579 descriptor-parsing code. Fixes bug 7149.
25580 - Fix two cases in src/or/transports.c where we were calling
25581 fmt_addr() twice in a parameter list. Bug found by David
25582 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25583 - Fix memory leaks whenever we logged any message about the "path
25584 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25585 - When relays refuse a "create" cell because their queue of pending
25586 create cells is too big (typically because their cpu can't keep up
25587 with the arrival rate), send back reason "resource limit" rather
25588 than reason "internal", so network measurement scripts can get a
25589 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
25592 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
25593 - Free some more still-in-use memory at exit, to make hunting for
25594 memory leaks easier. Resolves bug 7029.
25595 - When a Tor client gets a "truncated" relay cell, the first byte of
25596 its payload specifies why the circuit was truncated. We were
25597 ignoring this 'reason' byte when tearing down the circuit, resulting
25598 in the controller not being told why the circuit closed. Now we
25599 pass the reason from the truncated cell to the controller. Bugfix
25600 on 0.1.2.3-alpha; fixes bug 7039.
25601 - Downgrade "Failed to hand off onionskin" messages to "debug"
25602 severity, since they're typically redundant with the "Your computer
25603 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
25604 - Make clients running with IPv6 bridges connect over IPv6 again,
25605 even without setting new config options ClientUseIPv6 and
25606 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
25607 - Use square brackets around IPv6 addresses in numerous places
25608 that needed them, including log messages, HTTPS CONNECT proxy
25609 requests, TransportProxy statefile entries, and pluggable transport
25610 extra-info lines. Fixes bug 7011; patch by David Fifield.
25612 o Code refactoring and cleanup:
25613 - Source files taken from other packages now reside in src/ext;
25614 previously they were scattered around the rest of Tor.
25615 - Avoid use of reserved identifiers in our C code. The C standard
25616 doesn't like us declaring anything that starts with an
25617 underscore, so let's knock it off before we get in trouble. Fix
25618 for bug 1031; bugfix on the first Tor commit.
25621 Changes in version 0.2.3.23-rc - 2012-10-20
25622 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
25623 vulnerability introduced by a change in OpenSSL, and fixes a variety
25624 of smaller bugs in preparation for the release.
25626 o New directory authorities:
25627 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25628 authority. Closes ticket 5749.
25630 o Major bugfixes (security/privacy):
25631 - Disable TLS session tickets. OpenSSL's implementation was giving
25632 our TLS session keys the lifetime of our TLS context objects, when
25633 perfect forward secrecy would want us to discard anything that
25634 could decrypt a link connection as soon as the link connection
25635 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25636 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25637 - Discard extraneous renegotiation attempts once the V3 link
25638 protocol has been initiated. Failure to do so left us open to
25639 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25640 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25643 - Fix a possible crash bug when checking for deactivated circuits
25644 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25645 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25647 o Minor bugfixes (on 0.2.3.x):
25648 - Fix two cases in src/or/transports.c where we were calling
25649 fmt_addr() twice in a parameter list. Bug found by David
25650 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25651 - Convert an assert in the pathbias code to a log message. The assert
25652 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25653 bugfix on 0.2.3.17-beta.
25654 - Fix memory leaks whenever we logged any message about the "path
25655 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25657 o Minor bugfixes (on 0.2.2.x and earlier):
25658 - Don't serve or accept v2 hidden service descriptors over a relay's
25659 DirPort. It's never correct to do so, and disabling it might
25660 make it more annoying to exploit any bugs that turn up in the
25661 descriptor-parsing code. Fixes bug 7149.
25662 - When relays refuse a "create" cell because their queue of pending
25663 create cells is too big (typically because their cpu can't keep up
25664 with the arrival rate), send back reason "resource limit" rather
25665 than reason "internal", so network measurement scripts can get a
25666 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
25667 - Correct file sizes when reading binary files on Cygwin, to avoid
25668 a bug where Tor would fail to read its state file. Fixes bug 6844;
25669 bugfix on 0.1.2.7-alpha.
25670 - Avoid undefined behavior when parsing the list of supported
25671 rendezvous/introduction protocols in a hidden service descriptor.
25672 Previously, Tor would have confused (as-yet-unused) protocol version
25673 numbers greater than 32 with lower ones on many platforms. Fixes
25674 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25676 o Documentation fixes:
25677 - Clarify that hidden services are TCP only. Fixes bug 6024.
25680 Changes in version 0.2.4.3-alpha - 2012-09-22
25681 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
25682 assertion, resumes letting relays test reachability of their DirPort,
25683 and cleans up a bunch of smaller bugs.
25686 - Fix an assertion failure in tor_timegm() that could be triggered
25687 by a badly formatted directory object. Bug found by fuzzing with
25688 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25691 - Fix a possible crash bug when checking for deactivated circuits
25692 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25693 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25694 - Allow routers to detect that their own DirPorts are running. When
25695 we removed support for versions_supports_begindir, we also
25696 accidentally removed the mechanism we used to self-test our
25697 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
25698 bugfix on 0.2.4.2-alpha.
25700 o Security features:
25701 - Switch to a completely time-invariant approach for picking nodes
25702 weighted by bandwidth. Our old approach would run through the
25703 part of the loop after it had made its choice slightly slower
25704 than it ran through the part of the loop before it had made its
25705 choice. Addresses ticket 6538.
25706 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
25707 by tor2web clients allows hidden services to identify tor2web
25708 clients through their repeated selection of the same rendezvous
25709 and introduction point circuit endpoints (their guards). Resolves
25713 - Enable Tor to read configuration, state, and key information from
25714 a FIFO. Previously Tor would only read from files with a positive
25715 stat.st_size. Code from meejah; fixes bug 6044.
25718 - Correct file sizes when reading binary files on Cygwin, to avoid
25719 a bug where Tor would fail to read its state file. Fixes bug 6844;
25720 bugfix on 0.1.2.7-alpha.
25721 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
25722 bugfix on 0.2.0.3-alpha.
25723 - When complaining about a client port on a public address, log
25724 which address we're complaining about. Fixes bug 4020; bugfix on
25725 0.2.3.3-alpha. Patch by Tom Fitzhenry.
25726 - Convert an assert in the pathbias code to a log message. The assert
25727 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25728 bugfix on 0.2.3.17-beta.
25729 - Our new buildsystem was overzealous about rebuilding manpages: it
25730 would rebuild them all whenever any one of them changed. Now our
25731 dependency checking should be correct. Fixes bug 6843; bugfix on
25733 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
25734 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
25735 - Correct log printout about which address family is preferred
25736 when connecting to a bridge with both an IPv4 and IPv6 OR port.
25737 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
25739 o Minor bugfixes (code cleanliness):
25740 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
25741 with large values. This situation was untriggered, but nevertheless
25742 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
25743 - Reject consensus votes with more than 64 known-flags. We aren't even
25744 close to that limit yet, and our code doesn't handle it correctly.
25745 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
25746 - Avoid undefined behavior when parsing the list of supported
25747 rendezvous/introduction protocols in a hidden service descriptor.
25748 Previously, Tor would have confused (as-yet-unused) protocol version
25749 numbers greater than 32 with lower ones on many platforms. Fixes
25750 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25751 - Fix handling of rendezvous client authorization types over 8.
25752 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
25753 - Fix building with older versions of GCC (2.95, for one) that don't
25754 like preprocessor directives inside macro arguments. Found by
25755 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
25756 - Switch weighted node selection rule from using a list of doubles
25757 to using a list of int64_t. This change should make the process
25758 slightly easier to debug and maintain. Needed to finish ticket 6538.
25760 o Code simplification and refactoring:
25761 - Move the generic "config" code into a new file, and have "config.c"
25762 hold only torrc- and state-related code. Resolves ticket 6823.
25763 - Move the core of our "choose a weighted element at random" logic
25764 into its own function, and give it unit tests. Now the logic is
25765 testable, and a little less fragile too.
25766 - Removed the testing_since field of node_t, which hasn't been used
25767 for anything since 0.2.0.9-alpha.
25769 o Documentation fixes:
25770 - Clarify that hidden services are TCP only. Fixes bug 6024.
25771 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
25775 Changes in version 0.2.3.22-rc - 2012-09-11
25776 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
25780 - Fix an assertion failure in tor_timegm() that could be triggered
25781 by a badly formatted directory object. Bug found by fuzzing with
25782 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25785 - Avoid segfault when starting up having run with an extremely old
25786 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25790 Changes in version 0.2.2.39 - 2012-09-11
25791 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
25795 - Fix an assertion failure in tor_timegm() that could be triggered
25796 by a badly formatted directory object. Bug found by fuzzing with
25797 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25798 - Do not crash when comparing an address with port value 0 to an
25799 address policy. This bug could have been used to cause a remote
25800 assertion failure by or against directory authorities, or to
25801 allow some applications to crash clients. Fixes bug 6690; bugfix
25805 Changes in version 0.2.4.2-alpha - 2012-09-10
25806 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
25807 raises the default rate limiting even more, and makes the bootstrapping
25808 log messages less noisy.
25811 - Automatically forward the TCP ports of pluggable transport
25812 proxies using tor-fw-helper if PortForwarding is enabled. Implements
25816 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
25817 to 1GB/1GB. The previous defaults were intended to be "basically
25818 infinite", but it turns out they're now limiting our 100mbit+
25819 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
25820 last time we raised it).
25823 - Detect when we're running with a version of OpenSSL other than the
25824 one we compiled with. This has occasionally given people hard-to-
25826 - Log fewer lines at level "notice" about our OpenSSL and Libevent
25827 versions and capabilities when everything is going right. Resolves
25828 part of ticket 6736.
25829 - Directory authorities no long accept descriptors for any version of
25830 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
25831 These versions are insecure, unsupported, or both. Implements
25835 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
25836 to start with a triple-underscore so the controller won't touch it.
25837 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
25838 - Avoid segfault when starting up having run with an extremely old
25839 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25841 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
25842 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
25843 - Don't follow the NULL pointer if microdescriptor generation fails.
25844 (This does not appear to be triggerable, but it's best to be safe.)
25845 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
25846 - Fix mis-declared dependencies on src/common/crypto.c and
25847 src/or/tor_main.c that could break out-of-tree builds under some
25848 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
25849 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
25850 6778; bugfix on 0.2.4.1-alpha.
25851 - Fix a harmless (in this case) build warning for implicitly
25852 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
25854 o Removed features:
25855 - Now that all versions before 0.2.2.x are disallowed, we no longer
25856 need to work around their missing features. Thus we can remove a
25857 bunch of compatibility code.
25859 o Code refactoring:
25860 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
25861 TCP ports to forward. In the past it only accepted two ports:
25862 the ORPort and the DirPort.
25865 Changes in version 0.2.4.1-alpha - 2012-09-05
25866 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
25867 bridgedb; lets relays use IPv6 addresses and directory authorities
25868 advertise them; and switches to a cleaner build interface.
25870 This is the first alpha release in a new series, so expect there to
25871 be bugs. Users who would rather test out a more stable branch should
25872 stay with 0.2.3.x for now.
25874 o Major features (bridges):
25875 - Bridges now report the pluggable transports they support to the
25876 bridge authority, so it can pass the supported transports on to
25877 bridgedb and/or eventually do reachability testing. Implements
25880 o Major features (IPv6):
25881 - Bridge authorities now accept IPv6 bridge addresses and include
25882 them in network status documents. Implements ticket 5534.
25883 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
25884 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
25885 to happen. Implements ticket 5535.
25886 - All kind of relays, not just bridges, can now advertise an IPv6
25887 OR port. Implements ticket 6362.
25888 - Directory authorities vote on IPv6 OR ports using the new consensus
25889 method 14. Implements ticket 6363.
25891 o Major features (build):
25892 - Switch to a nonrecursive Makefile structure. Now instead of each
25893 Makefile.am invoking other Makefile.am's, there is a master
25894 Makefile.am that includes the others. This change makes our build
25895 process slightly more maintainable, and improves parallelism for
25896 building with make -j. Original patch by Stewart Smith; various
25897 fixes by Jim Meyering.
25898 - Where available, we now use automake's "silent" make rules by
25899 default, so that warnings are easier to spot. You can get the old
25900 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
25902 o Minor features (code security and spec conformance):
25903 - Clear keys and key-derived material left on the stack in
25904 rendservice.c and rendclient.c. Check return value of
25905 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
25906 These fixes should make us more forward-secure against cold-boot
25907 attacks and the like. Fixes bug 2385.
25908 - Reject EXTEND cells sent to nonexistent streams. According to the
25909 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
25910 we were only checking for stream IDs that were currently in use.
25911 Found while hunting for more instances of bug 6271. Bugfix on
25912 0.0.2pre8, which introduced incremental circuit construction.
25914 o Minor features (streamlining);
25915 - No longer include the "opt" prefix when generating routerinfos
25916 or v2 directories: it has been needless since Tor 0.1.2. Closes
25918 - Remove some now-needless code that tried to aggressively flush
25919 OR connections as data was added to them. Since 0.2.0.1-alpha, our
25920 cell queue logic has saved us from the failure mode that this code
25921 was supposed to prevent. Removing this code will limit the number
25922 of baroque control flow paths through Tor's network logic. Reported
25923 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
25925 o Minor features (controller):
25926 - Add a "GETINFO signal/names" control port command. Implements
25928 - Provide default values for all options via "GETINFO config/defaults".
25929 Implements ticket 4971.
25931 o Minor features (IPv6):
25932 - New config option "AuthDirHasIPv6Connectivity 1" that directory
25933 authorities should set if they have IPv6 connectivity and want to
25934 do reachability tests for IPv6 relays. Implements feature 5974.
25935 - A relay with an IPv6 OR port now sends that address in NETINFO
25936 cells (in addition to its other address). Implements ticket 6364.
25938 o Minor features (log messages):
25939 - Omit the first heartbeat log message, because it never has anything
25940 useful to say, and it clutters up the bootstrapping messages.
25941 Resolves ticket 6758.
25942 - Don't log about reloading the microdescriptor cache at startup. Our
25943 bootstrap warnings are supposed to tell the user when there's a
25944 problem, and our bootstrap notices say when there isn't. Resolves
25945 ticket 6759; bugfix on 0.2.2.6-alpha.
25946 - Don't log "I learned some more directory information" when we're
25947 reading cached directory information. Reserve it for when new
25948 directory information arrives in response to a fetch. Resolves
25950 - Prevent rounding error in path bias counts when scaling
25951 them down, and use the correct scale factor default. Also demote
25952 some path bias related log messages down a level and make others
25953 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
25954 - We no longer warn so much when generating manpages from their
25957 o Code simplifications and refactoring:
25958 - Enhance our internal sscanf replacement so that we can eliminate
25959 the last remaining uses of the system sscanf. (Though those uses
25960 of sscanf were safe, sscanf itself is generally error prone, so
25961 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
25963 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
25964 - Move last_reachable and testing_since from routerinfo_t to node_t.
25965 Implements ticket 5529.
25966 - Add replaycache_t structure, functions and unit tests, then refactor
25967 rend_service_introduce() to be more clear to read, improve, debug,
25968 and test. Resolves bug 6177.
25969 - Finally remove support for malloc_good_size and malloc_usable_size.
25970 We had hoped that these functions would let us eke a little more
25971 memory out of our malloc implementation. Unfortunately, the only
25972 implementations that provided these functions are also ones that
25973 are already efficient about not overallocation: they never got us
25974 more than 7 or so bytes per allocation. Removing them saves us a
25975 little code complexity and a nontrivial amount of build complexity.
25977 o New requirements:
25978 - Tor maintainers now require Automake version 1.9 or later to build
25979 Tor from the Git repository. (Automake is not required when building
25980 from a source distribution.)
25983 Changes in version 0.2.3.21-rc - 2012-09-05
25984 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
25985 series. It fixes a trio of potential security bugs, fixes a bug where
25986 we were leaving some of the fast relays out of the microdescriptor
25987 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
25988 and cleans up other smaller issues.
25990 o Major bugfixes (security):
25991 - Tear down the circuit if we get an unexpected SENDME cell. Clients
25992 could use this trick to make their circuits receive cells faster
25993 than our flow control would have allowed, or to gum up the network,
25994 or possibly to do targeted memory denial-of-service attacks on
25995 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
25996 from July 2002, before the release of Tor 0.0.0. We had committed
25997 this patch previously, but we had to revert it because of bug 6271.
25998 Now that 6271 is fixed, this patch appears to work.
25999 - Reject any attempt to extend to an internal address. Without
26000 this fix, a router could be used to probe addresses on an internal
26001 network to see whether they were accepting connections. Fixes bug
26002 6710; bugfix on 0.0.8pre1.
26003 - Do not crash when comparing an address with port value 0 to an
26004 address policy. This bug could have been used to cause a remote
26005 assertion failure by or against directory authorities, or to
26006 allow some applications to crash clients. Fixes bug 6690; bugfix
26010 - Remove the upper bound on microdescriptor length. We were hitting
26011 the limit for routers with complex exit policies or family
26012 declarations, causing clients to not use them. Fixes the first
26013 piece of bug 6404; fix on 0.2.2.6-alpha.
26014 - Detect "ORPort 0" as meaning, uniformly, that we're not running
26015 as a relay. Previously, some of our code would treat the presence
26016 of any ORPort line as meaning that we should act like a relay,
26017 even though our new listener code would correctly not open any
26018 ORPorts for ORPort 0. Similar bugs in other Port options are also
26019 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
26022 - Avoid a pair of double-free and use-after-mark bugs that can
26023 occur with certain timings in canceled and re-received DNS
26024 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
26025 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
26026 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
26027 - Allow one-hop directory fetching circuits the full "circuit build
26028 timeout" period, rather than just half of it, before failing them
26029 and marking the relay down. This fix should help reduce cases where
26030 clients declare relays (or worse, bridges) unreachable because
26031 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
26032 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
26034 - Authorities no longer include any router in their microdescriptor
26035 consensuses for which they couldn't generate or agree on a
26036 microdescriptor. Fixes the second piece of bug 6404; fix on
26038 - Detect and reject attempts to specify both "FooPort" and
26039 "FooPort 0" in the same configuration domain. (It's still okay
26040 to have a FooPort in your configuration file, and use "FooPort 0"
26041 on the command line to disable it.) Fixes the second half of bug
26042 6507; bugfix on 0.2.3.3-alpha.
26043 - Make wildcarded addresses (that is, ones beginning with "*.") work
26044 when provided via the controller's MapAddress command. Previously,
26045 they were accepted, but we never actually noticed that they were
26046 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
26047 - Avoid crashing on a malformed state file where EntryGuardPathBias
26048 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
26049 - Add a (probably redundant) memory clear between iterations of
26050 the router status voting loop, to prevent future coding errors
26051 where data might leak between iterations of the loop. Resolves
26054 o Minor bugfixes (log messages):
26055 - Downgrade "set buildtimeout to low value" messages to "info"
26056 severity; they were never an actual problem, there was never
26057 anything reasonable to do about them, and they tended to spam logs
26058 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
26059 - Downgrade path-bias warning messages to "info". We'll try to get
26060 them working better in 0.2.4. Add internal circuit construction
26061 state to protect against the noisy warn message "Unexpectedly high
26062 circuit_successes". Also add some additional rate-limited notice
26063 messages to help determine the root cause of the warn. Fixes bug
26064 6475. Bugfix against 0.2.3.17-beta.
26065 - Move log message when unable to find a microdesc in a routerstatus
26066 entry to parse time. Previously we'd spam this warning every time
26067 we tried to figure out which microdescriptors to download. Fixes
26068 the third piece of bug 6404; fix on 0.2.3.18-rc.
26071 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
26072 change when the authority is deciding whether to accept a newly
26073 uploaded descriptor. Implements ticket 6423.
26074 - Add missing documentation for consensus and microdesc files.
26075 Resolves ticket 6732.
26078 Changes in version 0.2.2.38 - 2012-08-12
26079 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
26080 attack that could in theory leak path information.
26083 - Avoid an uninitialized memory read when reading a vote or consensus
26084 document that has an unrecognized flavor name. This read could
26085 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
26086 - Try to leak less information about what relays a client is
26087 choosing to a side-channel attacker. Previously, a Tor client would
26088 stop iterating through the list of available relays as soon as it
26089 had chosen one, thus finishing a little earlier when it picked
26090 a router earlier in the list. If an attacker can recover this
26091 timing information (nontrivial but not proven to be impossible),
26092 they could learn some coarse-grained information about which relays
26093 a client was picking (middle nodes in particular are likelier to
26094 be affected than exits). The timing attack might be mitigated by
26095 other factors (see bug 6537 for some discussion), but it's best
26096 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
26099 Changes in version 0.2.3.20-rc - 2012-08-05
26100 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
26101 series. It fixes a pair of code security bugs and a potential anonymity
26102 issue, updates our RPM spec files, and cleans up other smaller issues.
26105 - Avoid read-from-freed-memory and double-free bugs that could occur
26106 when a DNS request fails while launching it. Fixes bug 6480;
26107 bugfix on 0.2.0.1-alpha.
26108 - Avoid an uninitialized memory read when reading a vote or consensus
26109 document that has an unrecognized flavor name. This read could
26110 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
26111 - Try to leak less information about what relays a client is
26112 choosing to a side-channel attacker. Previously, a Tor client would
26113 stop iterating through the list of available relays as soon as it
26114 had chosen one, thus finishing a little earlier when it picked
26115 a router earlier in the list. If an attacker can recover this
26116 timing information (nontrivial but not proven to be impossible),
26117 they could learn some coarse-grained information about which relays
26118 a client was picking (middle nodes in particular are likelier to
26119 be affected than exits). The timing attack might be mitigated by
26120 other factors (see bug 6537 for some discussion), but it's best
26121 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
26124 - Try to make the warning when giving an obsolete SOCKSListenAddress
26125 a little more useful.
26126 - Terminate active server managed proxies if Tor stops being a
26127 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
26128 - Provide a better error message about possible OSX Asciidoc failure
26129 reasons. Fixes bug 6436.
26130 - Warn when Tor is configured to use accounting in a way that can
26131 link a hidden service to some other hidden service or public
26132 address. Resolves ticket 6490.
26135 - Check return value of fputs() when writing authority certificate
26136 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
26137 - Ignore ServerTransportPlugin lines when Tor is not configured as
26138 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
26139 - When disabling guards for having too high a proportion of failed
26140 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
26144 - Update our default RPM spec files to work with mock and rpmbuild
26145 on RHEL/Fedora. They have an updated set of dependencies and
26146 conflicts, a fix for an ancient typo when creating the "_tor"
26147 user, and better instructions. Thanks to Ondrej Mikle for the
26148 patch series. Fixes bug 6043.
26151 - Make it possible to set the TestingTorNetwork configuration
26152 option using AlternateDirAuthority and AlternateBridgeAuthority
26153 as an alternative to setting DirServer. Addresses ticket 6377.
26156 - Clarify the documentation for the Alternate*Authority options.
26158 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
26160 o Code simplification and refactoring:
26161 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
26162 10 lines. Also, don't nest them. Doing so in the past has
26163 led to hard-to-debug code. The new style is to use the
26164 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
26167 Changes in version 0.2.3.19-rc - 2012-07-06
26168 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
26169 series. It fixes the compile on Windows, reverts to a GeoIP database
26170 that isn't as broken, and fixes a flow control bug that has been around
26171 since the beginning of Tor.
26174 - Fix a bug handling SENDME cells on nonexistent streams that could
26175 result in bizarre window values. Report and patch contributed
26176 pseudonymously. Fixes part of bug 6271. This bug was introduced
26177 before the first Tor release, in svn commit r152.
26178 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
26179 June 2012 database, Maxmind marked many Tor relays as country "A1",
26180 which will cause risky behavior for clients that set EntryNodes
26181 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
26182 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
26183 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
26186 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
26187 bugfix on 0.2.1.10-alpha.
26190 Changes in version 0.2.3.18-rc - 2012-06-28
26191 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
26192 series. It fixes a few smaller bugs, but generally appears stable.
26193 Please test it and let us know whether it is!
26196 - Allow wildcarded mapaddress targets to be specified on the
26197 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
26198 - Make our linker option detection code more robust against linkers
26199 such as on FreeBSD 8, where a bad combination of options completes
26200 successfully but makes an unrunnable binary. Fixes bug 6173;
26201 bugfix on 0.2.3.17-beta.
26203 o Minor bugfixes (on 0.2.2.x and earlier):
26204 - Avoid a false positive in the util/threads unit test by increasing
26205 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
26206 - Replace "Sending publish request" log messages with "Launching
26207 upload", so that they no longer confusingly imply that we're
26208 sending something to a directory we might not even be connected
26209 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
26210 - Make sure to set *socket_error in all error cases in
26211 connection_connect(), so it can't produce a warning about
26212 errno being zero from errno_to_orconn_end_reason(). Bugfix on
26213 0.2.1.1-alpha; resolves ticket 6028.
26214 - Downgrade "Got a certificate, but we already have it" log messages
26215 from warning to info, except when we're a dirauth. Fixes bug 5238;
26216 bugfix on 0.2.1.7-alpha.
26217 - When checking for requested signatures on the latest consensus
26218 before serving it to a client, make sure to check the right
26219 consensus flavor. Bugfix on 0.2.2.6-alpha.
26220 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
26221 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
26223 o Minor bugfixes (on 0.2.3.x):
26224 - Make format_helper_exit_status() avoid unnecessary space padding
26225 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
26227 - Downgrade a message about cleaning the microdescriptor cache to
26228 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
26229 - Log a BUG message at severity INFO if we have a networkstatus with
26230 a missing entry for some microdescriptor. Continues on a patch
26232 - Improve the log message when a managed proxy fails to launch. Fixes
26233 bug 5099; bugfix on 0.2.3.6-alpha.
26234 - Don't do DNS lookups when parsing corrupted managed proxy protocol
26235 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
26236 - When formatting wildcarded address mappings for the controller,
26237 be sure to include "*." as appropriate. Partially fixes bug 6244;
26238 bugfix on 0.2.3.9-alpha.
26239 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
26240 Bugfix on 0.2.3.13-alpha.
26241 - Stop logging messages about running with circuit timeout learning
26242 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
26243 - Disable a spurious warning about reading on a marked and flushing
26244 connection. We shouldn't be doing that, but apparently we
26245 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
26246 - Fix a bug that stopped AllowDotExit from working on addresses
26247 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
26250 o Code simplification, refactoring, unit tests:
26251 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
26252 Libevent's notion of cached time when possible.
26253 - Remove duplicate code for invoking getrlimit() from control.c.
26254 - Add a unit test for the environment_variable_names_equal function.
26257 - Document the --defaults-torrc option, and the new (in 0.2.3)
26258 semantics for overriding, extending, and clearing lists of
26259 options. Closes bug 4748.
26262 Changes in version 0.2.3.17-beta - 2012-06-15
26263 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
26264 gets our TLS handshake back on track for being able to blend in with
26265 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
26266 with Vidalia, and otherwise continues to get us closer to a release
26270 - Enable gcc and ld hardening by default. Resolves ticket 5210.
26271 - Update TLS cipher list to match Firefox 8 and later. Resolves
26273 - Implement the client side of proposal 198: remove support for
26274 clients falsely claiming to support standard ciphersuites that
26275 they can actually provide. As of modern OpenSSL versions, it's not
26276 necessary to fake any standard ciphersuite, and doing so prevents
26277 us from using better ciphersuites in the future, since servers
26278 can't know whether an advertised ciphersuite is really supported or
26279 not. Some hosts -- notably, ones with very old versions of OpenSSL
26280 or where OpenSSL has been built with ECC disabled -- will stand
26281 out because of this change; TBB users should not be affected.
26284 - Change the default value for DynamicDHGroups (introduced in
26285 0.2.3.9-alpha) to 0. This feature can make Tor relays less
26286 identifiable by their use of the mod_ssl DH group, but at
26287 the cost of some usability (#4721) and bridge tracing (#6087)
26288 regressions. Resolves ticket 5598.
26289 - Send a CRLF at the end of each STATUS_* control protocol event. This
26290 bug tickled a bug in Vidalia which would make it freeze. Fixes
26291 bug 6094; bugfix on 0.2.3.16-alpha.
26294 - Disable writing on marked-for-close connections when they are
26295 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
26296 bug 5263; bugfix on 0.0.2pre13, where we first added a special
26297 case for flushing marked connections.
26298 - Detect SSL handshake even when the initial attempt to write the
26299 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
26300 - Change the AllowDotExit rules so they should actually work.
26301 We now enforce AllowDotExit only immediately after receiving an
26302 address via SOCKS or DNSPort: other sources are free to provide
26303 .exit addresses after the resolution occurs. Fixes bug 3940;
26304 bugfix on 0.2.2.1-alpha.
26305 - Fix a (harmless) integer overflow in cell statistics reported by
26306 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
26307 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
26308 right places and never depends on the consensus parameters or
26309 computes adaptive timeouts when it is disabled. Fixes bug 5049;
26310 bugfix on 0.2.2.14-alpha.
26311 - When building Tor on Windows with -DUNICODE (not default), ensure
26312 that error messages, filenames, and DNS server names are always
26313 NUL-terminated when we convert them to a single-byte encoding.
26314 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
26315 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
26316 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
26317 - Fix an edge case where TestingTorNetwork is set but the authorities
26318 and relays all have an uptime of zero, where the private Tor network
26319 could briefly lack support for hidden services. Fixes bug 3886;
26320 bugfix on 0.2.2.18-alpha.
26321 - Correct the manpage's descriptions for the default values of
26322 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
26324 - Fix the documentation for the --hush and --quiet command line
26325 options, which changed their behavior back in 0.2.3.3-alpha.
26326 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
26330 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
26331 more information to it, so that we can track it down in case it
26332 returns again. Mitigates bug 5235.
26333 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
26334 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
26335 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
26336 - Warn the user when HTTPProxy, but no other proxy type, is
26337 configured. This can cause surprising behavior: it doesn't send
26338 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
26339 directory traffic only. Resolves ticket 4663.
26340 - Issue a notice if a guard completes less than 40% of your circuits.
26341 Threshold is configurable by torrc option PathBiasNoticeRate and
26342 consensus parameter pb_noticepct. There is additional, off-by-
26343 default code to disable guards which fail too many circuits.
26344 Addresses ticket 5458.
26345 - Update to the June 6 2012 Maxmind GeoLite Country database.
26347 o Code simplifications and refactoring:
26348 - Remove validate_pluggable_transports_config(): its warning
26349 message is now handled by connection_or_connect().
26352 Changes in version 0.2.2.37 - 2012-06-06
26353 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
26354 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26358 - Work around a bug in OpenSSL that broke renegotiation with TLS
26359 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26360 the v2 Tor connection protocol when both sides were using OpenSSL
26361 1.0.1 would fail. Resolves ticket 6033.
26362 - When waiting for a client to renegotiate, don't allow it to add
26363 any bytes to the input buffer. This fixes a potential DoS issue.
26364 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26365 - Fix an edge case where if we fetch or publish a hidden service
26366 descriptor, we might build a 4-hop circuit and then use that circuit
26367 for exiting afterwards -- even if the new last hop doesn't obey our
26368 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26371 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26372 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26375 - Tell GCC and Clang to check for any errors in format strings passed
26376 to the tor_v*(print|scan)f functions.
26379 Changes in version 0.2.3.16-alpha - 2012-06-05
26380 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
26381 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26382 currently). It also fixes a variety of smaller bugs and other cleanups
26383 that get us closer to a release candidate.
26385 o Major bugfixes (general):
26386 - Work around a bug in OpenSSL that broke renegotiation with TLS
26387 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26388 the v2 Tor connection protocol when both sides were using OpenSSL
26389 1.0.1 would fail. Resolves ticket 6033.
26390 - When waiting for a client to renegotiate, don't allow it to add
26391 any bytes to the input buffer. This fixes a potential DoS issue.
26392 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26393 - Pass correct OR address to managed proxies (like obfsproxy),
26394 even when ORListenAddress is used. Fixes bug 4865; bugfix on
26396 - The advertised platform of a router now includes only its operating
26397 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
26398 service pack level (for Windows) or its CPU architecture (for Unix).
26399 We also no longer include the "git-XYZ" tag in the version. Resolves
26402 o Major bugfixes (clients):
26403 - If we are unable to find any exit that supports our predicted ports,
26404 stop calling them predicted, so that we don't loop and build
26405 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
26406 which introduced predicted ports.
26407 - Fix an edge case where if we fetch or publish a hidden service
26408 descriptor, we might build a 4-hop circuit and then use that circuit
26409 for exiting afterwards -- even if the new last hop doesn't obey our
26410 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26411 - Check at each new consensus whether our entry guards were picked
26412 long enough ago that we should rotate them. Previously, we only
26413 did this check at startup, which could lead to us holding a guard
26414 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
26415 - When fetching a bridge descriptor from a bridge authority,
26416 always do so anonymously, whether we have been able to open
26417 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
26418 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
26419 but we'll need to wait for bug 6010 before it's actually usable.
26421 o Major bugfixes (directory authorities):
26422 - When computing weight parameters, behave more robustly in the
26423 presence of a bad bwweightscale value. Previously, the authorities
26424 would crash if they agreed on a sufficiently broken weight_scale
26425 value: now, they use a reasonable default and carry on. Partial
26426 fix for 5786; bugfix on 0.2.2.17-alpha.
26427 - Check more thoroughly to prevent a rogue authority from
26428 double-voting on any consensus directory parameter. Previously,
26429 authorities would crash in this case if the total number of
26430 votes for any parameter exceeded the number of active voters,
26431 but would let it pass otherwise. Partial fix for bug 5786; bugfix
26435 - Rate-limit log messages when asked to connect anonymously to
26436 a private address. When these hit, they tended to hit fast and
26437 often. Also, don't bother trying to connect to addresses that we
26438 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
26439 reply makes us think we have been lied to, even when the address the
26440 client tried to connect to was "localhost." Resolves ticket 2822.
26441 - Allow packagers to insert an extra string in server descriptor
26442 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
26443 Resolves the rest of ticket 2988.
26444 - Raise the threshold of server descriptors needed (75%) and exit
26445 server descriptors needed (50%) before we will declare ourselves
26446 bootstrapped. This will make clients start building circuits a
26447 little later, but makes the initially constructed circuits less
26448 skewed and less in conflict with further directory fetches. Fixes
26450 - Close any connection that sends unrecognized junk before the
26451 handshake. Solves an issue noted in bug 4369.
26452 - Improve log messages about managed transports. Resolves ticket 5070.
26453 - Tag a bridge's descriptor as "never to be sent unencrypted".
26454 This shouldn't matter, since bridges don't open non-anonymous
26455 connections to the bridge authority and don't allow unencrypted
26456 directory connections from clients, but we might as well make
26457 sure. Closes bug 5139.
26458 - Expose our view of whether we have gone dormant to the controller,
26459 via a new "GETINFO dormant" value. Torbutton and other controllers
26460 can use this to avoid doing periodic requests through Tor while
26461 it's dormant (bug 4718). Fixes bug 5954.
26462 - Tell GCC and Clang to check for any errors in format strings passed
26463 to the tor_v*(print|scan)f functions.
26464 - Update to the May 1 2012 Maxmind GeoLite Country database.
26466 o Minor bugfixes (already included in 0.2.2.36):
26467 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26468 Fixes bug 5346; bugfix on 0.0.8pre3.
26469 - Correct parsing of certain date types in parse_http_time().
26470 Without this patch, If-Modified-Since would behave
26471 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26472 Esteban Manchado Velázques.
26473 - Make our number-parsing functions always treat too-large values
26474 as an error, even when those values exceed the width of the
26475 underlying type. Previously, if the caller provided these
26476 functions with minima or maxima set to the extreme values of the
26477 underlying integer type, these functions would return those
26478 values on overflow rather than treating overflow as an error.
26479 Fixes part of bug 5786; bugfix on 0.0.9.
26480 - If we hit the error case where routerlist_insert() replaces an
26481 existing (old) server descriptor, make sure to remove that
26482 server descriptor from the old_routers list. Fix related to bug
26483 1776. Bugfix on 0.2.2.18-alpha.
26484 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26485 circuits. Fixes issue 5259.
26487 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
26488 - Prevent a null-pointer dereference when receiving a data cell
26489 for a nonexistent stream when the circuit in question has an
26490 empty deliver window. We don't believe this is triggerable,
26491 since we don't currently allow deliver windows to become empty,
26492 but the logic is tricky enough that it's better to make the code
26493 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
26494 - Fix a memory leak when trying to launch a DNS request when the
26495 network is disabled or the nameservers are unconfigurable. Fixes
26496 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
26497 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
26498 - Don't hold a Windows file handle open for every file mapping;
26499 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
26501 - Avoid O(n^2) performance characteristics when parsing a large
26502 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
26503 - Format more doubles with %f, not %lf. Patch from grarpamp to make
26504 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
26506 - Make our replacement implementation of strtok_r() compatible with
26507 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
26508 bugfix on 0.2.2.1-alpha.
26509 - Fix a NULL-pointer dereference on a badly formed
26510 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
26511 bugfix on 0.2.2.9-alpha.
26512 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26513 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26514 - Defensively refactor rend_mid_rendezvous() so that protocol
26515 violations and length checks happen in the beginning. Fixes
26517 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
26518 that IPv6 stuff will compile on MSVC, and compilation issues
26519 will be easier to track down. Fixes bug 5861.
26521 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
26522 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
26523 resource exhaustion, so that clients can adjust their load to
26524 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
26525 started using END_STREAM_REASON_RESOURCELIMIT.
26526 - Don't check for whether the address we're using for outbound
26527 connections has changed until after the outbound connection has
26528 completed. On Windows, getsockname() doesn't succeed until the
26529 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
26530 - If the configuration tries to set MyFamily on a bridge, refuse to
26531 do so, and warn about the security implications. Fixes bug 4657;
26532 bugfix on 0.2.0.3-alpha.
26533 - If the client fails to set a reasonable set of ciphersuites
26534 during its v2 handshake renegotiation, allow the renegotiation to
26535 continue nevertheless (i.e. send all the required certificates).
26536 Fixes bug 4591; bugfix on 0.2.0.20-rc.
26537 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
26538 option is set to 0 (which Vidalia version 0.2.16 now does when
26539 a SAVECONF attempt fails), perform other actions that SIGHUP
26540 usually causes (like reopening the logs). Fixes bug 5095; bugfix
26542 - If we fail to write a microdescriptor to the disk cache, do not
26543 continue replacing the old microdescriptor file. Fixes bug 2954;
26544 bugfix on 0.2.2.6-alpha.
26545 - Exit nodes don't need to fetch certificates for authorities that
26546 they don't recognize; only directory authorities, bridges,
26547 and caches need to do that. Fixes part of bug 2297; bugfix on
26549 - Correctly handle checking the permissions on the parent
26550 directory of a control socket in the root directory. Bug found
26551 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
26553 - When told to add a bridge with the same digest as a preexisting
26554 bridge but a different addr:port, change the addr:port as
26555 requested. Previously we would not notice the change. Fixes half
26556 of bug 5603; fix on 0.2.2.26-beta.
26557 - End AUTHCHALLENGE error messages (in the control protocol) with
26558 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
26560 o Minor bugfixes (on 0.2.3.x):
26561 - Turn an assertion (that the number of handshakes received as a
26562 server is not < 1) into a warning. Fixes bug 4873; bugfix on
26564 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
26565 we had reversed them when the answer was cached.) Fixes bug
26566 5723; bugfix on 0.2.3.1-alpha.
26567 - Work correctly on Linux systems with accept4 support advertised in
26568 their headers, but without accept4 support in the kernel. Fix
26569 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
26570 - When told to add a bridge with the same addr:port as a preexisting
26571 bridge but a different transport, change the transport as
26572 requested. Previously we would not notice the change. Fixes half
26573 of bug 5603; fix on 0.2.3.2-alpha.
26574 - Avoid a "double-reply" warning when replying to a SOCKS request
26575 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
26576 bugfix on 0.2.3.4-alpha.
26577 - Fix a bug where a bridge authority crashes if it has seen no
26578 directory requests when it's time to write statistics to disk.
26579 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
26581 - Don't try to open non-control listeners when DisableNetwork is set.
26582 Previously, we'd open all listeners, then immediately close them.
26583 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
26584 - Don't abort the managed proxy protocol if the managed proxy
26585 sends us an unrecognized line; ignore it instead. Fixes bug
26586 5910; bugfix on 0.2.3.9-alpha.
26587 - Fix a compile warning in crypto.c when compiling with clang 3.1.
26588 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
26589 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
26590 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
26591 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
26592 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
26593 - Resolve numerous small warnings and build issues with MSVC. Resolves
26596 o Documentation fixes:
26597 - Improve the manual's documentation for the NT Service command-line
26598 options. Addresses ticket 3964.
26599 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
26600 - Document the changes to the ORPort and DirPort options, and the
26601 fact that {OR/Dir}ListenAddress is now unnecessary (and
26602 therefore deprecated). Resolves ticket 5597.
26605 - Remove the torrc.bridge file: we don't use it for anything, and
26606 it had become badly desynchronized from torrc.sample. Resolves
26610 Changes in version 0.2.2.36 - 2012-05-24
26611 Tor 0.2.2.36 updates the addresses for two of the eight directory
26612 authorities, fixes some potential anonymity and security issues,
26613 and fixes several crash bugs.
26615 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
26616 known flaws, and nobody should be using them. You should upgrade. If
26617 you're using a Linux or BSD and its packages are obsolete, stop using
26618 those packages and upgrade anyway.
26620 o Directory authority changes:
26621 - Change IP address for maatuska (v3 directory authority).
26622 - Change IP address for ides (v3 directory authority), and rename
26626 - When building or running with any version of OpenSSL earlier
26627 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26628 versions have a bug (CVE-2011-4576) in which their block cipher
26629 padding includes uninitialized data, potentially leaking sensitive
26630 information to any peer with whom they make a SSLv3 connection. Tor
26631 does not use SSL v3 by default, but a hostile client or server
26632 could force an SSLv3 connection in order to gain information that
26633 they shouldn't have been able to get. The best solution here is to
26634 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26635 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26636 to make sure that the bug can't happen.
26637 - Never use a bridge or a controller-supplied node as an exit, even
26638 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26639 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26640 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26641 - Only build circuits if we have a sufficient threshold of the total
26642 descriptors that are marked in the consensus with the "Exit"
26643 flag. This mitigates an attack proposed by wanoskarnet, in which
26644 all of a client's bridges collude to restrict the exit nodes that
26645 the client knows about. Fixes bug 5343.
26646 - Provide controllers with a safer way to implement the cookie
26647 authentication mechanism. With the old method, if another locally
26648 running program could convince a controller that it was the Tor
26649 process, then that program could trick the controller into telling
26650 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26651 authentication method uses a challenge-response approach to prevent
26652 this attack. Fixes bug 5185; implements proposal 193.
26655 - Avoid logging uninitialized data when unable to decode a hidden
26656 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26657 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26658 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26660 - Fix builds when the path to sed, openssl, or sha1sum contains
26661 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26663 - Correct our replacements for the timeradd() and timersub() functions
26664 on platforms that lack them (for example, Windows). The timersub()
26665 function is used when expiring circuits, while timeradd() is
26666 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26667 bugfix on 0.2.2.24-alpha.
26668 - Fix the SOCKET_OK test that we use to tell when socket
26669 creation fails so that it works on Win64. Fixes part of bug 4533;
26670 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26673 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26674 Fixes bug 5346; bugfix on 0.0.8pre3.
26675 - Make our number-parsing functions always treat too-large values
26676 as an error, even when those values exceed the width of the
26677 underlying type. Previously, if the caller provided these
26678 functions with minima or maxima set to the extreme values of the
26679 underlying integer type, these functions would return those
26680 values on overflow rather than treating overflow as an error.
26681 Fixes part of bug 5786; bugfix on 0.0.9.
26682 - Older Linux kernels erroneously respond to strange nmap behavior
26683 by having accept() return successfully with a zero-length
26684 socket. When this happens, just close the connection. Previously,
26685 we would try harder to learn the remote address: but there was
26686 no such remote address to learn, and our method for trying to
26687 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26688 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26689 - Correct parsing of certain date types in parse_http_time().
26690 Without this patch, If-Modified-Since would behave
26691 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26692 Esteban Manchado Velázques.
26693 - Change the BridgePassword feature (part of the "bridge community"
26694 design, which is not yet implemented) to use a time-independent
26695 comparison. The old behavior might have allowed an adversary
26696 to use timing to guess the BridgePassword value. Fixes bug 5543;
26697 bugfix on 0.2.0.14-alpha.
26698 - Detect and reject certain misformed escape sequences in
26699 configuration values. Previously, these values would cause us
26700 to crash if received in a torrc file or over an authenticated
26701 control port. Bug found by Esteban Manchado Velázquez, and
26702 independently by Robert Connolly from Matta Consulting who further
26703 noted that it allows a post-authentication heap overflow. Patch
26704 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26705 bugfix on 0.2.0.16-alpha.
26706 - Fix a compile warning when using the --enable-openbsd-malloc
26707 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26708 - During configure, detect when we're building with clang version
26709 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26710 CFLAGS. clang doesn't support them yet.
26711 - When sending an HTTP/1.1 proxy request, include a Host header.
26712 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26713 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
26714 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
26715 - If we hit the error case where routerlist_insert() replaces an
26716 existing (old) server descriptor, make sure to remove that
26717 server descriptor from the old_routers list. Fix related to bug
26718 1776. Bugfix on 0.2.2.18-alpha.
26720 o Minor bugfixes (documentation and log messages):
26721 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26722 Fixes bug 4856; bugfix on Tor 0.0.6.
26723 - Update "ClientOnly" man page entry to explain that there isn't
26724 really any point to messing with it. Resolves ticket 5005.
26725 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26726 directory authority option (introduced in Tor 0.2.2.34).
26727 - Downgrade the "We're missing a certificate" message from notice
26728 to info: people kept mistaking it for a real problem, whereas it
26729 is seldom the problem even when we are failing to bootstrap. Fixes
26730 bug 5067; bugfix on 0.2.0.10-alpha.
26731 - Correctly spell "connect" in a log message on failure to create a
26732 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
26733 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26734 circuits. Fixes issue 5259.
26737 - Directory authorities now reject versions of Tor older than
26738 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26739 inclusive. These versions accounted for only a small fraction of
26740 the Tor network, and have numerous known security issues. Resolves
26742 - Update to the May 1 2012 Maxmind GeoLite Country database.
26745 - When sending or relaying a RELAY_EARLY cell, we used to convert
26746 it to a RELAY cell if the connection was using the v1 link
26747 protocol. This was a workaround for older versions of Tor, which
26748 didn't handle RELAY_EARLY cells properly. Now that all supported
26749 versions can handle RELAY_EARLY cells, and now that we're enforcing
26750 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26751 remove this workaround. Addresses bug 4786.
26754 Changes in version 0.2.3.15-alpha - 2012-04-30
26755 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
26756 the development branch build on Windows again.
26758 o Minor bugfixes (on 0.2.2.x and earlier):
26759 - Make sure that there are no unhandled pending TLS errors before
26760 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
26761 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
26762 Bugfix on 0.1.0.5-rc; fixes bug 4528.
26763 - Fix an assert that directory authorities could trigger on sighup
26764 during some configuration state transitions. We now don't treat
26765 it as a fatal error when the new descriptor we just generated in
26766 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
26767 - After we pick a directory mirror, we would refuse to use it if
26768 it's in our ExcludeExitNodes list, resulting in mysterious failures
26769 to bootstrap for people who just wanted to avoid exiting from
26770 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
26771 - When building with --enable-static-tor on OpenBSD, do not
26772 erroneously attempt to link -lrt. Fixes bug 5103.
26774 o Minor bugfixes (on 0.2.3.x):
26775 - When Tor is built with kernel headers from a recent (last few
26776 years) Linux kernel, do not fail to run on older (pre-2.6.28
26777 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
26778 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
26779 and 0.2.3.12-alpha.
26780 - Fix compilation with miniupnpc version 1.6; patch from
26781 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
26782 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
26783 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
26784 - Fix compilation on platforms without unistd.h, or where environ
26785 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
26788 - Directory authorities are now a little more lenient at accepting
26789 older router descriptors, or newer router descriptors that don't
26790 make big changes. This should help ameliorate past and future
26791 issues where routers think they have uploaded valid descriptors,
26792 but the authorities don't think so. Fix for ticket 2479.
26793 - Make the code that clients use to detect an address change be
26794 IPv6-aware, so that it won't fill clients' logs with error
26795 messages when trying to get the IPv4 address of an IPv6
26796 connection. Implements ticket 5537.
26798 o Removed features:
26799 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
26800 authorities needed to use it for a while to keep the network working
26801 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
26802 that was six months ago. As of now, it should no longer be needed
26806 Changes in version 0.2.3.14-alpha - 2012-04-23
26807 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
26808 candidate. It also dramatically speeds up AES: fast relays should
26809 consider switching to the newer OpenSSL library.
26811 o Directory authority changes:
26812 - Change IP address for ides (v3 directory authority), and rename
26816 - Avoid logging uninitialized data when unable to decode a hidden
26817 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26818 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26819 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26821 - If authorities are unable to get a v2 consensus document from other
26822 directory authorities, they no longer fall back to fetching
26823 them from regular directory caches. Fixes bug 5635; bugfix on
26824 0.2.2.26-beta, where routers stopped downloading v2 consensus
26825 documents entirely.
26826 - When we start a Tor client with a normal consensus already cached,
26827 be willing to download a microdescriptor consensus. Fixes bug 4011;
26828 fix on 0.2.3.1-alpha.
26830 o Major features (performance):
26831 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
26832 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
26833 vectorized AES implementations as appropriate. These can be much,
26834 much faster than other AES implementations.
26836 o Minor bugfixes (0.2.2.x and earlier):
26837 - Don't launch more than 10 service-side introduction-point circuits
26838 for a hidden service in five minutes. Previously, we would consider
26839 launching more introduction-point circuits if at least one second
26840 had passed without any introduction-point circuits failing. Fixes
26841 bug 4607; bugfix on 0.0.7pre1.
26842 - Change the BridgePassword feature (part of the "bridge community"
26843 design, which is not yet implemented) to use a time-independent
26844 comparison. The old behavior might have allowed an adversary
26845 to use timing to guess the BridgePassword value. Fixes bug 5543;
26846 bugfix on 0.2.0.14-alpha.
26847 - Enforce correct return behavior of tor_vsscanf() when the '%%'
26848 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
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 - Don't log that we have "decided to publish new relay descriptor"
26852 unless we are actually publishing a descriptor. Fixes bug 3942;
26853 bugfix on 0.2.2.28-beta.
26855 o Minor bugfixes (0.2.3.x):
26856 - Fix a bug where a bridge authority crashes (on a failed assert)
26857 if it has seen no directory requests when it's time to write
26858 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
26859 - Fix bug stomping on ORPort option NoListen and ignoring option
26860 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
26861 - In the testsuite, provide a large enough buffer in the tor_sscanf
26862 unit test. Otherwise we'd overrun that buffer and crash during
26863 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
26865 - Make sure we create the keys directory if it doesn't exist and we're
26866 about to store the dynamic Diffie-Hellman parameters. Fixes bug
26867 5572; bugfix on 0.2.3.13-alpha.
26868 - Fix a small memory leak when trying to decode incorrect base16
26869 authenticator during SAFECOOKIE authentication. Found by
26870 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
26873 - Add more information to a log statement that might help track down
26874 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
26875 non-IP address" messages (or any Bug messages, for that matter!),
26876 please let us know about it.
26877 - Relays now understand an IPv6 address when they get one from a
26878 directory server. Resolves ticket 4875.
26879 - Resolve IPv6 addresses in bridge and entry statistics to country
26880 code "??" which means we at least count them. Resolves ticket 5053;
26881 improves on 0.2.3.9-alpha.
26882 - Update to the April 3 2012 Maxmind GeoLite Country database.
26883 - Begin a doc/state-contents.txt file to explain the contents of
26884 the Tor state file. Fixes bug 2987.
26886 o Default torrc changes:
26887 - Stop listing "socksport 9050" in torrc.sample. We open a socks
26888 port on 9050 by default anyway, so this should not change anything
26890 - Stop mentioning the deprecated *ListenAddress options in
26891 torrc.sample. Fixes bug 5438.
26892 - Document unit of bandwidth related options in sample torrc.
26895 o Removed features:
26896 - The "torify" script no longer supports the "tsocks" socksifier
26897 tool, since tsocks doesn't support DNS and UDP right for Tor.
26898 Everyone should be using torsocks instead. Fixes bugs 3530 and
26899 5180. Based on a patch by "ugh".
26901 o Code refactoring:
26902 - Change the symmetric cipher interface so that creating and
26903 initializing a stream cipher are no longer separate functions.
26904 - Remove all internal support for unpadded RSA. We never used it, and
26905 it would be a bad idea to start.
26908 Changes in version 0.2.3.13-alpha - 2012-03-26
26909 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
26910 in managed pluggable transports, as well as providing other cleanups
26911 that get us closer to a release candidate.
26913 o Directory authority changes:
26914 - Change IP address for maatuska (v3 directory authority).
26917 - Provide controllers with a safer way to implement the cookie
26918 authentication mechanism. With the old method, if another locally
26919 running program could convince a controller that it was the Tor
26920 process, then that program could trick the controller into telling
26921 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26922 authentication method uses a challenge-response approach to prevent
26923 this attack. Fixes bug 5185, implements proposal 193.
26924 - Never use a bridge or a controller-supplied node as an exit, even
26925 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26926 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26927 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26928 - Only build circuits if we have a sufficient threshold of the total
26929 descriptors that are marked in the consensus with the "Exit"
26930 flag. This mitigates an attack proposed by wanoskarnet, in which
26931 all of a client's bridges collude to restrict the exit nodes that
26932 the client knows about. Fixes bug 5343.
26934 o Major bugfixes (on Tor 0.2.3.x):
26935 - Avoid an assert when managed proxies like obfsproxy are configured,
26936 and we receive HUP signals or setconf attempts too rapidly. This
26937 situation happens most commonly when Vidalia tries to attach to
26938 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
26939 bugfix on 0.2.3.6-alpha.
26940 - Fix a relay-side pluggable transports bug where managed proxies were
26941 unreachable from the Internet, because Tor asked them to bind on
26942 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
26943 - Stop discarding command-line arguments when TestingTorNetwork
26944 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
26945 0.2.3.9-alpha, where task 4552 added support for two layers of
26947 - Resume allowing the unit tests to run in gdb. This was accidentally
26948 made impossible when the DisableDebuggerAttachment option was
26949 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
26950 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
26951 0.2.3.11-alpha. Reported by Anthony G. Basile.
26953 o Minor bugfixes (on 0.2.2.x and earlier):
26954 - Ensure we don't cannibalize circuits that are longer than three hops
26955 already, so we don't end up making circuits with 5 or more
26956 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
26957 0.1.0.1-rc which introduced cannibalization.
26958 - Detect and reject certain misformed escape sequences in
26959 configuration values. Previously, these values would cause us
26960 to crash if received in a torrc file or over an authenticated
26961 control port. Bug found by Esteban Manchado Velázquez, and
26962 independently by Robert Connolly from Matta Consulting who further
26963 noted that it allows a post-authentication heap overflow. Patch
26964 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26965 bugfix on 0.2.0.16-alpha.
26966 - Fix a compile warning when using the --enable-openbsd-malloc
26967 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26968 - Directory caches no longer refuse to clean out descriptors because
26969 of missing v2 networkstatus documents, unless they're configured
26970 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
26971 0.2.2.26-beta. Patch by Daniel Bryg.
26972 - Update to the latest version of the tinytest unit testing framework.
26973 This includes a couple of bugfixes that can be relevant for
26974 running forked unit tests on Windows, and removes all reserved
26977 o Minor bugfixes (on 0.2.3.x):
26978 - On a failed pipe() call, don't leak file descriptors. Fixes bug
26979 4296; bugfix on 0.2.3.1-alpha.
26980 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
26981 until after we have received a CERTS cell. Fixes bug 4361; bugfix
26982 on 0.2.3.6-alpha. Patch by "frosty".
26983 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
26984 option, so that the IP stack doesn't decide to use it for IPv4
26985 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
26986 - Ensure that variables set in Tor's environment cannot override
26987 environment variables that Tor passes to a managed
26988 pluggable-transport proxy. Previously, Tor would pass every
26989 variable in its environment to managed proxies along with the new
26990 ones, in such a way that on many operating systems, the inherited
26991 environment variables would override those which Tor tried to
26992 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
26993 bugfix on 0.2.3.9-alpha for Windows.
26996 - A wide variety of new unit tests by Esteban Manchado Velázquez.
26997 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
26998 - Update to the March 6 2012 Maxmind GeoLite Country database.
27001 Changes in version 0.2.3.12-alpha - 2012-02-13
27002 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
27003 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
27004 when Tor is configured to use a pluggable transport like obfsproxy.
27007 - Fix builds when the path to sed, openssl, or sha1sum contains
27008 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
27010 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
27011 connections. This change should allow busy exit relays to stop
27012 running out of available sockets as quickly. Fixes bug 4950;
27013 bugfix on 0.2.2.26-beta.
27014 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
27015 would ask the bridge for microdescriptors, which are only supported
27016 in 0.2.3.x, and then fail to bootstrap when it didn't get the
27017 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
27018 - Properly set up obfsproxy's environment when in managed mode. The
27019 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
27020 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
27021 5076 and 5082; bugfix on 0.2.3.6-alpha.
27024 - Use the dead_strip option when building Tor on OS X. This reduces
27025 binary size by almost 19% when linking openssl and libevent
27026 statically, which we do for Tor Browser Bundle.
27027 - Fix broken URLs in the sample torrc file, and tell readers about
27028 the OutboundBindAddress, ExitPolicyRejectPrivate, and
27029 PublishServerDescriptor options. Addresses bug 4652.
27030 - Update to the February 7 2012 Maxmind GeoLite Country database.
27033 - Downgrade the "We're missing a certificate" message from notice
27034 to info: people kept mistaking it for a real problem, whereas it
27035 is seldom the problem even when we are failing to bootstrap. Fixes
27036 bug 5067; bugfix on 0.2.0.10-alpha.
27037 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
27038 managed pluggable transport server proxy's environment.
27039 Previously, we would put it there, even though Tor doesn't
27040 implement an 'extended server port' yet, and even though Tor
27041 almost certainly isn't listening at that address. For now, we set
27042 it to an empty string to avoid crashing older obfsproxies. Bugfix
27044 - Log the heartbeat message every HeartbeatPeriod seconds, not every
27045 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
27046 0.2.3.1-alpha. Bug reported by Scott Bennett.
27047 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
27048 bugfix on 0.2.3.11-alpha.
27049 - Update "ClientOnly" man page entry to explain that there isn't
27050 really any point to messing with it. Resolves ticket 5005.
27051 - Use the correct CVE number for CVE-2011-4576 in our comments and
27052 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
27055 o Code simplifications and refactoring:
27056 - Use the _WIN32 macro throughout our code to detect Windows.
27057 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
27061 Changes in version 0.2.3.11-alpha - 2012-01-22
27062 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
27063 the last step of the plan to limit maximum circuit length, includes
27064 a wide variety of hidden service performance and correctness fixes,
27065 works around an OpenSSL security flaw if your distro is too stubborn
27066 to upgrade, and fixes a bunch of smaller issues.
27069 - Now that Tor 0.2.0.x is completely deprecated, enable the final
27070 part of "Proposal 110: Avoiding infinite length circuits" by
27071 refusing all circuit-extend requests that do not use a relay_early
27072 cell. This change helps Tor resist a class of denial-of-service
27073 attacks by limiting the maximum circuit length.
27074 - Adjust the number of introduction points that a hidden service
27075 will try to maintain based on how long its introduction points
27076 remain in use and how many introductions they handle. Fixes
27078 - Try to use system facilities for enumerating local interface
27079 addresses, before falling back to our old approach (which was
27080 binding a UDP socket, and calling getsockname() on it). That
27081 approach was scaring OS X users whose draconian firewall
27082 software warned about binding to UDP sockets, regardless of
27083 whether packets were sent. Now we try to use getifaddrs(),
27084 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
27085 system supports. Resolves ticket 1827.
27087 o Major security workaround:
27088 - When building or running with any version of OpenSSL earlier
27089 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
27090 versions have a bug (CVE-2011-4576) in which their block cipher
27091 padding includes uninitialized data, potentially leaking sensitive
27092 information to any peer with whom they make a SSLv3 connection. Tor
27093 does not use SSL v3 by default, but a hostile client or server
27094 could force an SSLv3 connection in order to gain information that
27095 they shouldn't have been able to get. The best solution here is to
27096 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
27097 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
27098 to make sure that the bug can't happen.
27101 - Fix the SOCKET_OK test that we use to tell when socket
27102 creation fails so that it works on Win64. Fixes part of bug 4533;
27103 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
27104 - Correct our replacements for the timeradd() and timersub() functions
27105 on platforms that lack them (for example, Windows). The timersub()
27106 function is used when expiring circuits, while timeradd() is
27107 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
27108 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
27109 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
27110 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
27111 bug at runtime, not compile time, because some distributions hack
27112 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
27113 on 0.2.3.9-alpha. Found by Pascal.
27115 o Minor features (controller):
27116 - Use absolute path names when reporting the torrc filename in the
27117 control protocol, so a controller can more easily find the torrc
27118 file. Resolves bug 1101.
27119 - Extend the control protocol to report flags that control a circuit's
27120 path selection in CIRC events and in replies to 'GETINFO
27121 circuit-status'. Implements part of ticket 2411.
27122 - Extend the control protocol to report the hidden service address
27123 and current state of a hidden-service-related circuit in CIRC
27124 events and in replies to 'GETINFO circuit-status'. Implements part
27126 - When reporting the path to the cookie file to the controller,
27127 give an absolute path. Resolves ticket 4881.
27128 - Allow controllers to request an event notification whenever a
27129 circuit is cannibalized or its purpose is changed. Implements
27130 part of ticket 3457.
27131 - Include the creation time of a circuit in CIRC and CIRC2
27132 control-port events and the list produced by the 'GETINFO
27133 circuit-status' control-port command.
27135 o Minor features (directory authorities):
27136 - Directory authorities now reject versions of Tor older than
27137 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
27138 inclusive. These versions accounted for only a small fraction of
27139 the Tor network, and have numerous known security issues. Resolves
27141 - Authority operators can now vote for all relays in a given
27142 set of countries to be BadDir/BadExit/Invalid/Rejected.
27143 - Provide two consensus parameters (FastFlagMinThreshold and
27144 FastFlagMaxThreshold) to control the range of allowable bandwidths
27145 for the Fast directory flag. These allow authorities to run
27146 experiments on appropriate requirements for being a "Fast" node.
27147 The AuthDirFastGuarantee config value still applies. Implements
27149 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
27150 directory authority option (introduced in Tor 0.2.2.34).
27152 o Minor features (other):
27153 - Don't disable the DirPort when we cannot exceed our AccountingMax
27154 limit during this interval because the effective bandwidthrate is
27155 low enough. This is useful in a situation where AccountMax is only
27156 used as an additional safeguard or to provide statistics.
27157 - Prepend an informative header to generated dynamic_dh_params files.
27158 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
27159 EntryNodes will have no effect. Resolves issue 2571.
27160 - Log more useful messages when we fail to disable debugger
27162 - Log which authority we're missing votes from when we go to fetch
27163 them from the other auths.
27164 - Log (at debug level) whenever a circuit's purpose is changed.
27165 - Add missing documentation for the MaxClientCircuitsPending,
27166 UseMicrodescriptors, UserspaceIOCPBuffers, and
27167 _UseFilteringSSLBufferevents options, all introduced during
27168 the 0.2.3.x series.
27169 - Update to the January 3 2012 Maxmind GeoLite Country database.
27171 o Minor bugfixes (hidden services):
27172 - Don't close hidden service client circuits which have almost
27173 finished connecting to their destination when they reach
27174 the normal circuit-build timeout. Previously, we would close
27175 introduction circuits which are waiting for an acknowledgement
27176 from the introduction point, and rendezvous circuits which have
27177 been specified in an INTRODUCE1 cell sent to a hidden service,
27178 after the normal CBT. Now, we mark them as 'timed out', and launch
27179 another rendezvous attempt in parallel. This behavior change can
27180 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
27181 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
27182 - Don't close hidden-service-side rendezvous circuits when they
27183 reach the normal circuit-build timeout. This behavior change can
27184 be disabled using the new
27185 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
27186 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
27187 - Make sure we never mark the wrong rendezvous circuit as having
27188 had its introduction cell acknowledged by the introduction-point
27189 relay. Previously, when we received an INTRODUCE_ACK cell on a
27190 client-side hidden-service introduction circuit, we might have
27191 marked a rendezvous circuit other than the one we specified in
27192 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
27193 a warning message and interfered with the hidden service
27194 connection-establishment process. Fixes bug 4759; bugfix on
27195 0.2.3.3-alpha, when we added the stream-isolation feature which
27196 might cause Tor to open multiple rendezvous circuits for the same
27198 - Don't trigger an assertion failure when we mark a new client-side
27199 hidden-service introduction circuit for close during the process
27200 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
27203 o Minor bugfixes (log messages):
27204 - Correctly spell "connect" in a log message on failure to create a
27205 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
27207 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
27208 Fixes bug 4856; bugfix on Tor 0.0.6.
27209 - Fix the log message describing how we work around discovering
27210 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
27211 4837; bugfix on 0.2.2.9-alpha.
27212 - When logging about a disallowed .exit name, do not also call it
27213 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
27215 o Minor bugfixes (build fixes):
27216 - During configure, detect when we're building with clang version
27217 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
27218 CFLAGS. clang doesn't support them yet.
27219 - During configure, search for library containing cos function as
27220 libm lives in libcore on some platforms (BeOS/Haiku). Linking
27221 against libm was hard-coded before. Fixes the first part of bug
27222 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
27224 - Detect attempts to build Tor on (as yet hypothetical) versions
27225 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
27226 fix for bug 4533. Bugfix on 0.2.2.28-beta.
27227 - Preprocessor directives should not be put inside the arguments
27228 of a macro. This would break compilation with GCC releases prior
27229 to version 3.3. We would never recommend such an old GCC version,
27230 but it is apparently required for binary compatibility on some
27231 platforms (namely, certain builds of Haiku). Fixes the other part
27232 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
27235 o Minor bugfixes (other):
27236 - Older Linux kernels erroneously respond to strange nmap behavior
27237 by having accept() return successfully with a zero-length
27238 socket. When this happens, just close the connection. Previously,
27239 we would try harder to learn the remote address: but there was
27240 no such remote address to learn, and our method for trying to
27241 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
27242 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
27243 - Fix null-pointer access that could occur if TLS allocation failed.
27244 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
27245 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
27246 accidentally been reverted.
27247 - Fix our implementation of crypto_random_hostname() so it can't
27248 overflow on ridiculously large inputs. (No Tor version has ever
27249 provided this kind of bad inputs, but let's be correct in depth.)
27250 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
27251 - Find more places in the code that should have been testing for
27252 invalid sockets using the SOCKET_OK macro. Required for a fix
27253 for bug 4533. Bugfix on 0.2.2.28-beta.
27254 - Fix an assertion failure when, while running with bufferevents, a
27255 connection finishes connecting after it is marked for close, but
27256 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
27257 - test_util_spawn_background_ok() hardcoded the expected value
27258 for ENOENT to 2. This isn't portable as error numbers are
27259 platform specific, and particularly the hurd has ENOENT at
27260 0x40000002. Construct expected string at runtime, using the correct
27261 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
27262 - Reject attempts to disable DisableDebuggerAttachment while Tor is
27263 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
27264 - Use an appropriate-width type for sockets in tor-fw-helper on
27265 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
27268 - When sending or relaying a RELAY_EARLY cell, we used to convert
27269 it to a RELAY cell if the connection was using the v1 link
27270 protocol. This was a workaround for older versions of Tor, which
27271 didn't handle RELAY_EARLY cells properly. Now that all supported
27272 versions can handle RELAY_EARLY cells, and now that we're enforcing
27273 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
27274 remove this workaround. Addresses bug 4786.
27276 o Code simplifications and refactoring:
27277 - Use OpenSSL's built-in SSL_state_string_long() instead of our
27278 own homebrewed ssl_state_to_string() replacement. Patch from
27279 Emile Snyder. Fixes bug 4653.
27280 - Use macros to indicate OpenSSL versions, so we don't need to worry
27281 about accidental hexadecimal bit shifts.
27282 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
27284 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
27285 - Use the smartlist_add_asprintf() alias more consistently.
27286 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
27287 invalid value, rather than just -1.
27288 - Rename a handful of old identifiers, mostly related to crypto
27289 structures and crypto functions. By convention, our "create an
27290 object" functions are called "type_new()", our "free an object"
27291 functions are called "type_free()", and our types indicate that
27292 they are types only with a final "_t". But a handful of older
27293 types and functions broke these rules, with function names like
27294 "type_create" or "subsystem_op_type", or with type names like
27298 Changes in version 0.2.3.10-alpha - 2011-12-16
27299 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
27300 Tor's buffers code. Absolutely everybody should upgrade.
27302 The bug relied on an incorrect calculation when making data continuous
27303 in one of our IO buffers, if the first chunk of the buffer was
27304 misaligned by just the wrong amount. The miscalculation would allow an
27305 attacker to overflow a piece of heap-allocated memory. To mount this
27306 attack, the attacker would need to either open a SOCKS connection to
27307 Tor's SocksPort (usually restricted to localhost), or target a Tor
27308 instance configured to make its connections through a SOCKS proxy
27309 (which Tor does not do by default).
27311 Good security practice requires that all heap-overflow bugs should be
27312 presumed to be exploitable until proven otherwise, so we are treating
27313 this as a potential code execution attack. Please upgrade immediately!
27314 This bug does not affect bufferevents-based builds of Tor. Special
27315 thanks to "Vektor" for reporting this issue to us!
27317 This release also contains a few minor bugfixes for issues discovered
27321 - Fix a heap overflow bug that could occur when trying to pull
27322 data into the first chunk of a buffer, when that chunk had
27323 already had some data drained from it. Fixes CVE-2011-2778;
27324 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27327 - If we can't attach streams to a rendezvous circuit when we
27328 finish connecting to a hidden service, clear the rendezvous
27329 circuit's stream-isolation state and try to attach streams
27330 again. Previously, we cleared rendezvous circuits' isolation
27331 state either too early (if they were freshly built) or not at all
27332 (if they had been built earlier and were cannibalized). Bugfix on
27333 0.2.3.3-alpha; fixes bug 4655.
27334 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
27335 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
27336 - Fix an assertion failure when a relay with accounting enabled
27337 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
27340 - Update to the December 6 2011 Maxmind GeoLite Country database.
27343 Changes in version 0.2.2.35 - 2011-12-16
27344 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
27345 buffers code. Absolutely everybody should upgrade.
27347 The bug relied on an incorrect calculation when making data continuous
27348 in one of our IO buffers, if the first chunk of the buffer was
27349 misaligned by just the wrong amount. The miscalculation would allow an
27350 attacker to overflow a piece of heap-allocated memory. To mount this
27351 attack, the attacker would need to either open a SOCKS connection to
27352 Tor's SocksPort (usually restricted to localhost), or target a Tor
27353 instance configured to make its connections through a SOCKS proxy
27354 (which Tor does not do by default).
27356 Good security practice requires that all heap-overflow bugs should be
27357 presumed to be exploitable until proven otherwise, so we are treating
27358 this as a potential code execution attack. Please upgrade immediately!
27359 This bug does not affect bufferevents-based builds of Tor. Special
27360 thanks to "Vektor" for reporting this issue to us!
27362 Tor 0.2.2.35 also fixes several bugs in previous versions, including
27363 crash bugs for unusual configurations, and a long-term bug that
27364 would prevent Tor from starting on Windows machines with draconian
27367 With this release, we remind everyone that 0.2.0.x has reached its
27368 formal end-of-life. Those Tor versions have many known flaws, and
27369 nobody should be using them. You should upgrade -- ideally to the
27370 0.2.2.x series. If you're using a Linux or BSD and its packages are
27371 obsolete, stop using those packages and upgrade anyway.
27373 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
27374 longer receive support after some time in early 2012.
27377 - Fix a heap overflow bug that could occur when trying to pull
27378 data into the first chunk of a buffer, when that chunk had
27379 already had some data drained from it. Fixes CVE-2011-2778;
27380 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27381 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27382 that it doesn't attempt to allocate a socketpair. This could cause
27383 some problems on Windows systems with overzealous firewalls. Fix for
27384 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27386 - If we mark an OR connection for close based on a cell we process,
27387 don't process any further cells on it. We already avoid further
27388 reads on marked-for-close connections, but now we also discard the
27389 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27390 which was the first version where we might mark a connection for
27391 close based on processing a cell on it.
27392 - Correctly sanity-check that we don't underflow on a memory
27393 allocation (and then assert) for hidden service introduction
27394 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27395 bugfix on 0.2.1.5-alpha.
27396 - Fix a memory leak when we check whether a hidden service
27397 descriptor has any usable introduction points left. Fixes bug
27398 4424. Bugfix on 0.2.2.25-alpha.
27399 - Don't crash when we're running as a relay and don't have a GeoIP
27400 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
27401 we've had in the 0.2.3.x branch already.
27402 - When running as a client, do not print a misleading (and plain
27403 wrong) log message that we're collecting "directory request"
27404 statistics: clients don't collect statistics. Also don't create a
27405 useless (because empty) stats file in the stats/ directory. Fixes
27406 bug 4353; bugfix on 0.2.2.34.
27409 - Detect failure to initialize Libevent. This fix provides better
27410 detection for future instances of bug 4457.
27411 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27412 function. This was eating up hideously large amounts of time on some
27413 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27414 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27415 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27417 - Don't warn about unused log_mutex in log.c when building with
27418 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27419 0.1.0.6-rc which introduced --disable-threads.
27420 - When configuring, starting, or stopping an NT service, stop
27421 immediately after the service configuration attempt has succeeded
27422 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27423 - When sending a NETINFO cell, include the original address
27424 received for the other side, not its canonical address. Found
27425 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27426 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
27427 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27428 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27429 occurred when a client tried to fetch a descriptor for a bridge
27430 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27431 - Backport fixes for a pair of compilation warnings on Windows.
27432 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
27433 - If we had ever tried to call tor_addr_to_str on an address of
27434 unknown type, we would have done a strdup on an uninitialized
27435 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27436 Reported by "troll_un".
27437 - Correctly detect and handle transient lookup failures from
27438 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27439 Reported by "troll_un".
27440 - Fix null-pointer access that could occur if TLS allocation failed.
27441 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27442 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27443 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27446 - Add two new config options for directory authorities:
27447 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27448 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27449 that is always sufficient to satisfy the bandwidth requirement for
27450 the Guard flag. Now it will be easier for researchers to simulate
27451 Tor networks with different values. Resolves ticket 4484.
27452 - When Tor ignores a hidden service specified in its configuration,
27453 include the hidden service's directory in the warning message.
27454 Previously, we would only tell the user that some hidden service
27455 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27456 - Update to the December 6 2011 Maxmind GeoLite Country database.
27458 o Packaging changes:
27459 - Make it easier to automate expert package builds on Windows,
27460 by removing an absolute path from makensis.exe command.
27463 Changes in version 0.2.1.32 - 2011-12-16
27464 Tor 0.2.1.32 backports important security and privacy fixes for
27465 oldstable. This release is intended only for package maintainers and
27466 others who cannot use the 0.2.2 stable series. All others should be
27467 using Tor 0.2.2.x or newer.
27469 The Tor 0.2.1.x series will reach formal end-of-life some time in
27470 early 2012; we will stop releasing patches for it then.
27472 o Major bugfixes (also included in 0.2.2.x):
27473 - Correctly sanity-check that we don't underflow on a memory
27474 allocation (and then assert) for hidden service introduction
27475 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27476 bugfix on 0.2.1.5-alpha.
27477 - Fix a heap overflow bug that could occur when trying to pull
27478 data into the first chunk of a buffer, when that chunk had
27479 already had some data drained from it. Fixes CVE-2011-2778;
27480 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27483 - Update to the December 6 2011 Maxmind GeoLite Country database.
27486 Changes in version 0.2.3.9-alpha - 2011-12-08
27487 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
27488 a "DisableNetwork" security feature that bundles can use to avoid
27489 touching the network until bridges are configured, moves forward on
27490 the pluggable transport design, fixes a flaw in the hidden service
27491 design that unnecessarily prevented clients with wrong clocks from
27492 reaching hidden services, and fixes a wide variety of other issues.
27495 - Clients can now connect to private bridges over IPv6. Bridges
27496 still need at least one IPv4 address in order to connect to
27497 other relays. Note that we don't yet handle the case where the
27498 user has two bridge lines for the same bridge (one IPv4, one
27499 IPv6). Implements parts of proposal 186.
27500 - New "DisableNetwork" config option to prevent Tor from launching any
27501 connections or accepting any connections except on a control port.
27502 Bundles and controllers can set this option before letting Tor talk
27503 to the rest of the network, for example to prevent any connections
27504 to a non-bridge address. Packages like Orbot can also use this
27505 option to instruct Tor to save power when the network is off.
27506 - Clients and bridges can now be configured to use a separate
27507 "transport" proxy. This approach makes the censorship arms race
27508 easier by allowing bridges to use protocol obfuscation plugins. It
27509 implements the "managed proxy" part of proposal 180 (ticket 3472).
27510 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
27511 implementation. It makes AES_CTR about 7% faster than our old one
27512 (which was about 10% faster than the one OpenSSL used to provide).
27513 Resolves ticket 4526.
27514 - Add a "tor2web mode" for clients that want to connect to hidden
27515 services non-anonymously (and possibly more quickly). As a safety
27516 measure to try to keep users from turning this on without knowing
27517 what they are doing, tor2web mode must be explicitly enabled at
27518 compile time, and a copy of Tor compiled to run in tor2web mode
27519 cannot be used as a normal Tor client. Implements feature 2553.
27520 - Add experimental support for running on Windows with IOCP and no
27521 kernel-space socket buffers. This feature is controlled by a new
27522 "UserspaceIOCPBuffers" config option (off by default), which has
27523 no effect unless Tor has been built with support for bufferevents,
27524 is running on Windows, and has enabled IOCP. This may, in the long
27525 run, help solve or mitigate bug 98.
27526 - Use a more secure consensus parameter voting algorithm. Now at
27527 least three directory authorities or a majority of them must
27528 vote on a given parameter before it will be included in the
27529 consensus. Implements proposal 178.
27532 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
27533 They used to check that the timestamp was within 30 minutes
27534 of their system clock, so they could cap the size of their
27535 replay-detection cache, but that approach unnecessarily refused
27536 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
27537 the v3 intro-point protocol (the first one which sent a timestamp
27538 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
27539 - Only use the EVP interface when AES acceleration is enabled,
27540 to avoid a 5-7% performance regression. Resolves issue 4525;
27541 bugfix on 0.2.3.8-alpha.
27543 o Privacy/anonymity features (bridge detection):
27544 - Make bridge SSL certificates a bit more stealthy by using random
27545 serial numbers, in the same fashion as OpenSSL when generating
27546 self-signed certificates. Implements ticket 4584.
27547 - Introduce a new config option "DynamicDHGroups", enabled by
27548 default, which provides each bridge with a unique prime DH modulus
27549 to be used during SSL handshakes. This option attempts to help
27550 against censors who might use the Apache DH modulus as a static
27551 identifier for bridges. Addresses ticket 4548.
27553 o Minor features (new/different config options):
27554 - New configuration option "DisableDebuggerAttachment" (on by default)
27555 to prevent basic debugging attachment attempts by other processes.
27556 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
27557 - Allow MapAddress directives to specify matches against super-domains,
27558 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
27559 Implements issue 933.
27560 - Slightly change behavior of "list" options (that is, config
27561 options that can appear more than once) when they appear both in
27562 torrc and on the command line. Previously, the command-line options
27563 would be appended to the ones from torrc. Now, the command-line
27564 options override the torrc options entirely. This new behavior
27565 allows the user to override list options (like exit policies and
27566 ports to listen on) from the command line, rather than simply
27567 appending to the list.
27568 - You can get the old (appending) command-line behavior for "list"
27569 options by prefixing the option name with a "+".
27570 - You can remove all the values for a "list" option from the command
27571 line without adding any new ones by prefixing the option name
27573 - Add experimental support for a "defaults" torrc file to be parsed
27574 before the regular torrc. Torrc options override the defaults file's
27575 options in the same way that the command line overrides the torrc.
27576 The SAVECONF controller command saves only those options which
27577 differ between the current configuration and the defaults file. HUP
27578 reloads both files. (Note: This is an experimental feature; its
27579 behavior will probably be refined in future 0.2.3.x-alpha versions
27580 to better meet packagers' needs.) Implements task 4552.
27583 - Try to make the introductory warning message that Tor prints on
27584 startup more useful for actually finding help and information.
27585 Resolves ticket 2474.
27586 - Running "make version" now displays the version of Tor that
27587 we're about to build. Idea from katmagic; resolves issue 4400.
27588 - Expire old or over-used hidden service introduction points.
27589 Required by fix for bug 3460.
27590 - Move the replay-detection cache for the RSA-encrypted parts of
27591 INTRODUCE2 cells to the introduction point data structures.
27592 Previously, we would use one replay-detection cache per hidden
27593 service. Required by fix for bug 3460.
27594 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
27595 public key replay-detection cache from 60 minutes to 5 minutes. This
27596 replay-detection cache is now used only to detect multiple
27597 INTRODUCE2 cells specifying the same rendezvous point, so we can
27598 avoid launching multiple simultaneous attempts to connect to it.
27600 o Minor bugfixes (on Tor 0.2.2.x and earlier):
27601 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27602 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27604 - Fix a minor formatting issue in one of tor-gencert's error messages.
27606 - Prevent a false positive from the check-spaces script, by disabling
27607 the "whitespace between function name and (" check for functions
27609 - Fix a log message suggesting that people contact a non-existent
27610 email address. Fixes bug 3448.
27611 - Fix null-pointer access that could occur if TLS allocation failed.
27612 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27613 - Report a real bootstrap problem to the controller on router
27614 identity mismatch. Previously we just said "foo", which probably
27615 made a lot of sense at the time. Fixes bug 4169; bugfix on
27617 - If we had ever tried to call tor_addr_to_str() on an address of
27618 unknown type, we would have done a strdup() on an uninitialized
27619 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27620 Reported by "troll_un".
27621 - Correctly detect and handle transient lookup failures from
27622 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27623 Reported by "troll_un".
27624 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27625 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27626 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
27627 bug 4532; found by "troll_un".
27629 o Minor bugfixes (on Tor 0.2.3.x):
27630 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
27632 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
27633 circuit for use as a hidden service client's rendezvous point.
27634 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
27635 with help from wanoskarnet.
27636 - Restore behavior of overriding SocksPort, ORPort, and similar
27637 options from the command line. Bugfix on 0.2.3.3-alpha.
27640 - Properly handle the case where the build-tree is not the same
27641 as the source tree when generating src/common/common_sha1.i,
27642 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
27643 bugfix on 0.2.0.1-alpha.
27645 o Code simplifications, cleanups, and refactorings:
27646 - Remove the pure attribute from all functions that used it
27647 previously. In many cases we assigned it incorrectly, because the
27648 functions might assert or call impure functions, and we don't have
27649 evidence that keeping the pure attribute is worthwhile. Implements
27650 changes suggested in ticket 4421.
27651 - Remove some dead code spotted by coverity. Fixes cid 432.
27652 Bugfix on 0.2.3.1-alpha, closes bug 4637.
27655 Changes in version 0.2.3.8-alpha - 2011-11-22
27656 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
27657 socketpair-related bug that has been bothering Windows users. It adds
27658 support to serve microdescriptors to controllers, so Vidalia's network
27659 map can resume listing relays (once Vidalia implements its side),
27660 and adds better support for hardware AES acceleration. Finally, it
27661 starts the process of adjusting the bandwidth cutoff for getting the
27662 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
27663 that tiny relays harm performance more than they help network capacity.
27666 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27667 that it doesn't attempt to allocate a socketpair. This could cause
27668 some problems on Windows systems with overzealous firewalls. Fix for
27669 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27671 - Correctly sanity-check that we don't underflow on a memory
27672 allocation (and then assert) for hidden service introduction
27673 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27674 bugfix on 0.2.1.5-alpha.
27675 - Remove the artificially low cutoff of 20KB to guarantee the Fast
27676 flag. In the past few years the average relay speed has picked
27677 up, and while the "top 7/8 of the network get the Fast flag" and
27678 "all relays with 20KB or more of capacity get the Fast flag" rules
27679 used to have the same result, now the top 7/8 of the network has
27680 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
27681 - Fix a rare assertion failure when checking whether a v0 hidden
27682 service descriptor has any usable introduction points left, and
27683 we don't have enough information to build a circuit to the first
27684 intro point named in the descriptor. The HS client code in
27685 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
27686 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
27687 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
27688 - Make bridge authorities not crash when they are asked for their own
27689 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
27690 - When running as a client, do not print a misleading (and plain
27691 wrong) log message that we're collecting "directory request"
27692 statistics: clients don't collect statistics. Also don't create a
27693 useless (because empty) stats file in the stats/ directory. Fixes
27694 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
27697 - Allow Tor controllers like Vidalia to obtain the microdescriptor
27698 for a relay by identity digest or nickname. Previously,
27699 microdescriptors were only available by their own digests, so a
27700 controller would have to ask for and parse the whole microdescriptor
27701 consensus in order to look up a single relay's microdesc. Fixes
27702 bug 3832; bugfix on 0.2.3.1-alpha.
27703 - Use OpenSSL's EVP interface for AES encryption, so that all AES
27704 operations can use hardware acceleration (if present). Resolves
27707 o Minor bugfixes (on 0.2.2.x and earlier):
27708 - Detect failure to initialize Libevent. This fix provides better
27709 detection for future instances of bug 4457.
27710 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27711 function. This was eating up hideously large amounts of time on some
27712 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27713 - Don't warn about unused log_mutex in log.c when building with
27714 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27715 0.1.0.6-rc which introduced --disable-threads.
27716 - Allow manual 'authenticate' commands to the controller interface
27717 from netcat (nc) as well as telnet. We were rejecting them because
27718 they didn't come with the expected whitespace at the end of the
27719 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
27720 - Fix some (not actually triggerable) buffer size checks in usage of
27721 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
27723 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
27724 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
27725 - When configuring, starting, or stopping an NT service, stop
27726 immediately after the service configuration attempt has succeeded
27727 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27728 - When sending a NETINFO cell, include the original address
27729 received for the other side, not its canonical address. Found
27730 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27731 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
27732 can pick them up when the tests aren't disabled. Bugfix on
27733 0.2.2.4-alpha which introduced tinytest.
27734 - Fix a memory leak when we check whether a hidden service
27735 descriptor has any usable introduction points left. Fixes bug
27736 4424. Bugfix on 0.2.2.25-alpha.
27737 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27738 occurred when a client tried to fetch a descriptor for a bridge
27739 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27741 o Minor bugfixes (on 0.2.3.x):
27742 - Make util unit tests build correctly with MSVC. Bugfix on
27743 0.2.3.3-alpha. Patch by Gisle Vanem.
27744 - Successfully detect AUTH_CHALLENGE cells with no recognized
27745 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
27746 Found by frosty_un.
27747 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
27748 it should still send a NETINFO cell to allow the connection to
27749 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
27751 - Log less loudly when we get an invalid authentication certificate
27752 from a source other than a directory authority: it's not unusual
27753 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
27755 - Tolerate servers with more clock skew in their authentication
27756 certificates than previously. Fixes bug 4371; bugfix on
27758 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
27759 on 0.2.3.4-alpha and 0.2.3.6-alpha.
27762 - Add two new config options for directory authorities:
27763 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27764 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27765 that is always sufficient to satisfy the bandwidth requirement for
27766 the Guard flag. Now it will be easier for researchers to simulate
27767 Tor networks with different values. Resolves ticket 4484.
27768 - When Tor ignores a hidden service specified in its configuration,
27769 include the hidden service's directory in the warning message.
27770 Previously, we would only tell the user that some hidden service
27771 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27772 - When we fail to initialize Libevent, retry with IOCP disabled so we
27773 don't need to turn on multi-threading support in Libevent, which in
27774 turn requires a working socketpair(). This is a workaround for bug
27775 4457, which affects Libevent versions from 2.0.1-alpha through
27777 - Detect when we try to build on a platform that doesn't define
27778 AF_UNSPEC to 0. We don't work there, so refuse to compile.
27779 - Update to the November 1 2011 Maxmind GeoLite Country database.
27781 o Packaging changes:
27782 - Make it easier to automate expert package builds on Windows,
27783 by removing an absolute path from makensis.exe command.
27785 o Code simplifications and refactoring:
27786 - Remove some redundant #include directives throughout the code.
27787 Patch from Andrea Gelmini.
27788 - Unconditionally use OpenSSL's AES implementation instead of our
27789 old built-in one. OpenSSL's AES has been better for a while, and
27790 relatively few servers should still be on any version of OpenSSL
27791 that doesn't have good optimized assembly AES.
27792 - Use the name "CERTS" consistently to refer to the new cell type;
27793 we were calling it CERT in some places and CERTS in others.
27796 - Numerous new unit tests for functions in util.c and address.c by
27798 - The long-disabled benchmark tests are now split into their own
27799 ./src/test/bench binary.
27800 - The benchmark tests can now use more accurate timers than
27801 gettimeofday() when such timers are available.
27804 Changes in version 0.2.3.7-alpha - 2011-10-30
27805 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
27806 the new v3 handshake. It also resolves yet another bridge address
27810 - If we mark an OR connection for close based on a cell we process,
27811 don't process any further cells on it. We already avoid further
27812 reads on marked-for-close connections, but now we also discard the
27813 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27814 which was the first version where we might mark a connection for
27815 close based on processing a cell on it.
27816 - Fix a double-free bug that would occur when we received an invalid
27817 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
27818 bugfix on 0.2.3.6-alpha.
27819 - Bridges no longer include their address in NETINFO cells on outgoing
27820 OR connections, to allow them to blend in better with clients.
27821 Removes another avenue for enumerating bridges. Reported by
27822 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
27823 cells were introduced.
27826 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
27827 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27830 Changes in version 0.2.3.6-alpha - 2011-10-26
27831 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
27832 anonymity vulnerability where an attacker can deanonymize Tor
27833 users. Everybody should upgrade.
27835 This release also features support for a new v3 connection handshake
27836 protocol, and fixes to make hidden service connections more robust.
27839 - Implement a new handshake protocol (v3) for authenticating Tors to
27840 each other over TLS. It should be more resistant to fingerprinting
27841 than previous protocols, and should require less TLS hacking for
27842 future Tor implementations. Implements proposal 176.
27843 - Allow variable-length padding cells to disguise the length of
27844 Tor's TLS records. Implements part of proposal 184.
27846 o Privacy/anonymity fixes (clients):
27847 - Clients and bridges no longer send TLS certificate chains on
27848 outgoing OR connections. Previously, each client or bridge would
27849 use the same cert chain for all outgoing OR connections until
27850 its IP address changes, which allowed any relay that the client
27851 or bridge contacted to determine which entry guards it is using.
27852 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27853 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27854 no longer considers that connection as suitable for satisfying a
27855 circuit EXTEND request. Now relays can protect clients from the
27856 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27857 - Directory authorities no longer assign the Guard flag to relays
27858 that haven't upgraded to the above "refuse EXTEND requests
27859 to client connections" fix. Now directory authorities can
27860 protect clients from the CVE-2011-2768 issue even if neither
27861 the clients nor the relays have upgraded yet. There's a new
27862 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27863 to let us transition smoothly, else tomorrow there would be no
27866 o Major bugfixes (hidden services):
27867 - Improve hidden service robustness: when an attempt to connect to
27868 a hidden service ends, be willing to refetch its hidden service
27869 descriptors from each of the HSDir relays responsible for them
27870 immediately. Previously, we would not consider refetching the
27871 service's descriptors from each HSDir for 15 minutes after the last
27872 fetch, which was inconvenient if the hidden service was not running
27873 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
27874 - When one of a hidden service's introduction points appears to be
27875 unreachable, stop trying it. Previously, we would keep trying
27876 to build circuits to the introduction point until we lost the
27877 descriptor, usually because the user gave up and restarted Tor.
27878 Partly fixes bug 3825.
27879 - Don't launch a useless circuit after failing to use one of a
27880 hidden service's introduction points. Previously, we would
27881 launch a new introduction circuit, but not set the hidden service
27882 which that circuit was intended to connect to, so it would never
27883 actually be used. A different piece of code would then create a
27884 new introduction circuit correctly. Bug reported by katmagic and
27885 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27887 o Major bugfixes (other):
27888 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27889 that they initiated. Relays could distinguish incoming bridge
27890 connections from client connections, creating another avenue for
27891 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27892 Found by "frosty_un".
27893 - Don't update the AccountingSoftLimitHitAt state file entry whenever
27894 tor gets started. This prevents a wrong average bandwidth
27895 estimate, which would cause relays to always start a new accounting
27896 interval at the earliest possible moment. Fixes bug 2003; bugfix
27897 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
27898 immensely in tracking this bug down.
27899 - Fix a crash bug when changing node restrictions while a DNS lookup
27900 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27903 o Minor bugfixes (on 0.2.2.x and earlier):
27904 - When a hidden service turns an extra service-side introduction
27905 circuit into a general-purpose circuit, free the rend_data and
27906 intro_key fields first, so we won't leak memory if the circuit
27907 is cannibalized for use as another service-side introduction
27908 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27909 - Rephrase the log message emitted if the TestSocks check is
27910 successful. Patch from Fabian Keil; fixes bug 4094.
27911 - Bridges now skip DNS self-tests, to act a little more stealthily.
27912 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27913 bridges. Patch by "warms0x".
27914 - Remove a confusing dollar sign from the example fingerprint in the
27915 man page, and also make the example fingerprint a valid one. Fixes
27916 bug 4309; bugfix on 0.2.1.3-alpha.
27917 - Fix internal bug-checking logic that was supposed to catch
27918 failures in digest generation so that it will fail more robustly
27919 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27920 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27921 - Report any failure in init_keys() calls launched because our
27922 IP address has changed. Spotted by Coverity Scan. Bugfix on
27923 0.1.1.4-alpha; fixes CID 484.
27925 o Minor bugfixes (on 0.2.3.x):
27926 - Fix a bug in configure.in that kept it from building a configure
27927 script with autoconf versions earlier than 2.61. Fixes bug 2430;
27928 bugfix on 0.2.3.1-alpha.
27929 - Don't warn users that they are exposing a client port to the
27930 Internet if they have specified an RFC1918 address. Previously,
27931 we would warn if the user had specified any non-loopback
27932 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
27933 - Fix memory leaks in the failing cases of the new SocksPort and
27934 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
27935 fixes coverity CIDs 485, 486, and 487.
27938 - When a hidden service's introduction point times out, consider
27939 trying it again during the next attempt to connect to the
27940 HS. Previously, we would not try it again unless a newly fetched
27941 descriptor contained it. Required by fixes for bugs 1297 and 3825.
27942 - The next version of Windows will be called Windows 8, and it has
27943 a major version of 6, minor version of 2. Correctly identify that
27944 version instead of calling it "Very recent version". Resolves
27945 ticket 4153; reported by funkstar.
27946 - The Bridge Authority now writes statistics on how many bridge
27947 descriptors it gave out in total, and how many unique descriptors
27948 it gave out. It also lists how often the most and least commonly
27949 fetched descriptors were given out, as well as the median and
27950 25th/75th percentile. Implements tickets 4200 and 4294.
27951 - Update to the October 4 2011 Maxmind GeoLite Country database.
27953 o Code simplifications and refactoring:
27954 - Remove some old code to remember statistics about which descriptors
27955 we've served as a directory mirror. The feature wasn't used and
27956 is outdated now that microdescriptors are around.
27957 - Rename Tor functions that turn strings into addresses, so that
27958 "parse" indicates that no hostname resolution occurs, and
27959 "lookup" indicates that hostname resolution may occur. This
27960 should help prevent mistakes in the future. Fixes bug 3512.
27963 Changes in version 0.2.2.34 - 2011-10-26
27964 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
27965 can deanonymize Tor users. Everybody should upgrade.
27967 The attack relies on four components: 1) Clients reuse their TLS cert
27968 when talking to different relays, so relays can recognize a user by
27969 the identity key in her cert. 2) An attacker who knows the client's
27970 identity key can probe each guard relay to see if that identity key
27971 is connected to that guard relay right now. 3) A variety of active
27972 attacks in the literature (starting from "Low-Cost Traffic Analysis
27973 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
27974 discover the guard relays that a Tor user visiting the website is using.
27975 4) Clients typically pick three guards at random, so the set of guards
27976 for a given user could well be a unique fingerprint for her. This
27977 release fixes components #1 and #2, which is enough to block the attack;
27978 the other two remain as open research problems. Special thanks to
27979 "frosty_un" for reporting the issue to us!
27981 Clients should upgrade so they are no longer recognizable by the TLS
27982 certs they present. Relays should upgrade so they no longer allow a
27983 remote attacker to probe them to test whether unpatched clients are
27984 currently connected to them.
27986 This release also fixes several vulnerabilities that allow an attacker
27987 to enumerate bridge relays. Some bridge enumeration attacks still
27988 remain; see for example proposal 188.
27990 o Privacy/anonymity fixes (clients):
27991 - Clients and bridges no longer send TLS certificate chains on
27992 outgoing OR connections. Previously, each client or bridge would
27993 use the same cert chain for all outgoing OR connections until
27994 its IP address changes, which allowed any relay that the client
27995 or bridge contacted to determine which entry guards it is using.
27996 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27997 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27998 no longer considers that connection as suitable for satisfying a
27999 circuit EXTEND request. Now relays can protect clients from the
28000 CVE-2011-2768 issue even if the clients haven't upgraded yet.
28001 - Directory authorities no longer assign the Guard flag to relays
28002 that haven't upgraded to the above "refuse EXTEND requests
28003 to client connections" fix. Now directory authorities can
28004 protect clients from the CVE-2011-2768 issue even if neither
28005 the clients nor the relays have upgraded yet. There's a new
28006 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
28007 to let us transition smoothly, else tomorrow there would be no
28010 o Privacy/anonymity fixes (bridge enumeration):
28011 - Bridge relays now do their directory fetches inside Tor TLS
28012 connections, like all the other clients do, rather than connecting
28013 directly to the DirPort like public relays do. Removes another
28014 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
28015 - Bridges relays now build circuits for themselves in a more similar
28016 way to how clients build them. Removes another avenue for
28017 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
28018 when bridges were introduced.
28019 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
28020 that they initiated. Relays could distinguish incoming bridge
28021 connections from client connections, creating another avenue for
28022 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
28023 Found by "frosty_un".
28026 - Fix a crash bug when changing node restrictions while a DNS lookup
28027 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
28029 - Don't launch a useless circuit after failing to use one of a
28030 hidden service's introduction points. Previously, we would
28031 launch a new introduction circuit, but not set the hidden service
28032 which that circuit was intended to connect to, so it would never
28033 actually be used. A different piece of code would then create a
28034 new introduction circuit correctly. Bug reported by katmagic and
28035 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
28038 - Change an integer overflow check in the OpenBSD_Malloc code so
28039 that GCC is less likely to eliminate it as impossible. Patch
28040 from Mansour Moufid. Fixes bug 4059.
28041 - When a hidden service turns an extra service-side introduction
28042 circuit into a general-purpose circuit, free the rend_data and
28043 intro_key fields first, so we won't leak memory if the circuit
28044 is cannibalized for use as another service-side introduction
28045 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
28046 - Bridges now skip DNS self-tests, to act a little more stealthily.
28047 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
28048 bridges. Patch by "warms0x".
28049 - Fix internal bug-checking logic that was supposed to catch
28050 failures in digest generation so that it will fail more robustly
28051 if we ask for a nonexistent algorithm. Found by Coverity Scan.
28052 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
28053 - Report any failure in init_keys() calls launched because our
28054 IP address has changed. Spotted by Coverity Scan. Bugfix on
28055 0.1.1.4-alpha; fixes CID 484.
28057 o Minor bugfixes (log messages and documentation):
28058 - Remove a confusing dollar sign from the example fingerprint in the
28059 man page, and also make the example fingerprint a valid one. Fixes
28060 bug 4309; bugfix on 0.2.1.3-alpha.
28061 - The next version of Windows will be called Windows 8, and it has
28062 a major version of 6, minor version of 2. Correctly identify that
28063 version instead of calling it "Very recent version". Resolves
28064 ticket 4153; reported by funkstar.
28065 - Downgrade log messages about circuit timeout calibration from
28066 "notice" to "info": they don't require or suggest any human
28067 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
28068 bugfix on 0.2.2.14-alpha.
28071 - Turn on directory request statistics by default and include them in
28072 extra-info descriptors. Don't break if we have no GeoIP database.
28073 Backported from 0.2.3.1-alpha; implements ticket 3951.
28074 - Update to the October 4 2011 Maxmind GeoLite Country database.
28077 Changes in version 0.2.1.31 - 2011-10-26
28078 Tor 0.2.1.31 backports important security and privacy fixes for
28079 oldstable. This release is intended only for package maintainers and
28080 others who cannot use the 0.2.2 stable series. All others should be
28081 using Tor 0.2.2.x or newer.
28083 o Security fixes (also included in 0.2.2.x):
28084 - Replace all potentially sensitive memory comparison operations
28085 with versions whose runtime does not depend on the data being
28086 compared. This will help resist a class of attacks where an
28087 adversary can use variations in timing information to learn
28088 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28089 implementation by Robert Ransom based partially on code by DJB.)
28090 - Fix an assert in parsing router descriptors containing IPv6
28091 addresses. This one took down the directory authorities when
28092 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
28094 o Privacy/anonymity fixes (also included in 0.2.2.x):
28095 - Clients and bridges no longer send TLS certificate chains on
28096 outgoing OR connections. Previously, each client or bridge would
28097 use the same cert chain for all outgoing OR connections until
28098 its IP address changes, which allowed any relay that the client
28099 or bridge contacted to determine which entry guards it is using.
28100 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
28101 - If a relay receives a CREATE_FAST cell on a TLS connection, it
28102 no longer considers that connection as suitable for satisfying a
28103 circuit EXTEND request. Now relays can protect clients from the
28104 CVE-2011-2768 issue even if the clients haven't upgraded yet.
28105 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
28106 that they initiated. Relays could distinguish incoming bridge
28107 connections from client connections, creating another avenue for
28108 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
28109 Found by "frosty_un".
28110 - When receiving a hidden service descriptor, check that it is for
28111 the hidden service we wanted. Previously, Tor would store any
28112 hidden service descriptors that a directory gave it, whether it
28113 wanted them or not. This wouldn't have let an attacker impersonate
28114 a hidden service, but it did let directories pre-seed a client
28115 with descriptors that it didn't want. Bugfix on 0.0.6.
28116 - Avoid linkability based on cached hidden service descriptors: forget
28117 all hidden service descriptors cached as a client when processing a
28118 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28119 - Make the bridge directory authority refuse to answer directory
28120 requests for "all" descriptors. It used to include bridge
28121 descriptors in its answer, which was a major information leak.
28122 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
28123 - Don't attach new streams to old rendezvous circuits after SIGNAL
28124 NEWNYM. Previously, we would keep using an existing rendezvous
28125 circuit if it remained open (i.e. if it were kept open by a
28126 long-lived stream, or if a new stream were attached to it before
28127 Tor could notice that it was old and no longer in use). Bugfix on
28128 0.1.1.15-rc; fixes bug 3375.
28130 o Minor bugfixes (also included in 0.2.2.x):
28131 - When we restart our relay, we might get a successful connection
28132 from the outside before we've started our reachability tests,
28133 triggering a warning: "ORPort found reachable, but I have no
28134 routerinfo yet. Failing to inform controller of success." This
28135 bug was harmless unless Tor is running under a controller
28136 like Vidalia, in which case the controller would never get a
28137 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
28139 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
28140 enabled. Fixes bug 1526.
28141 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28142 anything since 0.2.1.16-rc.
28143 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
28144 None of the cases where we did this before were wrong, but by making
28145 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
28146 - Fix a rare crash bug that could occur when a client was configured
28147 with a large number of bridges. Fixes bug 2629; bugfix on
28148 0.2.1.2-alpha. Bugfix by trac user "shitlei".
28149 - Correct the warning displayed when a rendezvous descriptor exceeds
28150 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
28152 - Fix an uncommon assertion failure when running with DNSPort under
28153 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28154 - When warning about missing zlib development packages during compile,
28155 give the correct package names. Bugfix on 0.2.0.1-alpha.
28156 - Require that introduction point keys and onion keys have public
28157 exponent 65537. Bugfix on 0.2.0.10-alpha.
28158 - Do not crash when our configuration file becomes unreadable, for
28159 example due to a permissions change, between when we start up
28160 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28162 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28164 - Always NUL-terminate the sun_path field of a sockaddr_un before
28165 passing it to the kernel. (Not a security issue: kernels are
28166 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28167 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28168 - Don't stack-allocate the list of supplementary GIDs when we're
28169 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28170 could take up to 256K, which is way too much stack. Found by
28171 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28173 o Minor bugfixes (only in 0.2.1.x):
28174 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
28175 rely on them. Bugfix on 0.2.1.30.
28176 - Use git revisions instead of svn revisions when generating our
28177 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
28179 o Minor features (also included in 0.2.2.x):
28180 - Adjust the expiration time on our SSL session certificates to
28181 better match SSL certs seen in the wild. Resolves ticket 4014.
28182 - Allow nameservers with IPv6 address. Resolves bug 2574.
28183 - Update to the October 4 2011 Maxmind GeoLite Country database.
28186 Changes in version 0.2.3.5-alpha - 2011-09-28
28187 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
28188 bridge relays; fixes an assertion error that many users started hitting
28189 today; and adds the ability to refill token buckets more often than
28190 once per second, allowing significant performance improvements.
28193 - Bridge relays now do their directory fetches inside Tor TLS
28194 connections, like all the other clients do, rather than connecting
28195 directly to the DirPort like public relays do. Removes another
28196 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
28197 - Bridges relays now build circuits for themselves in a more similar
28198 way to how clients build them. Removes another avenue for
28199 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
28200 when bridges were introduced.
28203 - Fix an "Assertion md->held_by_node == 1 failed" error that could
28204 occur when the same microdescriptor was referenced by two node_t
28205 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
28207 o Major features (networking):
28208 - Add a new TokenBucketRefillInterval option to refill token buckets
28209 more frequently than once per second. This should improve network
28210 performance, alleviate queueing problems, and make traffic less
28211 bursty. Implements proposal 183; closes ticket 3630. Design by
28212 Florian Tschorsch and Björn Scheuermann; implementation by
28216 - Change an integer overflow check in the OpenBSD_Malloc code so
28217 that GCC is less likely to eliminate it as impossible. Patch
28218 from Mansour Moufid. Fixes bug 4059.
28220 o Minor bugfixes (usability):
28221 - Downgrade log messages about circuit timeout calibration from
28222 "notice" to "info": they don't require or suggest any human
28223 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
28224 bugfix on 0.2.2.14-alpha.
28226 o Minor features (diagnostics):
28227 - When the system call to create a listener socket fails, log the
28228 error message explaining why. This may help diagnose bug 4027.
28231 Changes in version 0.2.3.4-alpha - 2011-09-13
28232 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
28233 tweak to Tor's TLS handshake that makes relays and bridges that run
28234 this new version reachable from Iran again. It also fixes a few new
28235 bugs in 0.2.3.x, and teaches relays to recognize when they're not
28236 listed in the network consensus and republish.
28238 o Major bugfixes (also part of 0.2.2.33):
28239 - Avoid an assertion failure when reloading a configuration with
28240 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
28241 3923; bugfix on 0.2.2.25-alpha.
28243 o Minor features (security, also part of 0.2.2.33):
28244 - Check for replays of the public-key encrypted portion of an
28245 INTRODUCE1 cell, in addition to the current check for replays of
28246 the g^x value. This prevents a possible class of active attacks
28247 by an attacker who controls both an introduction point and a
28248 rendezvous point, and who uses the malleability of AES-CTR to
28249 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
28250 that these attacks are infeasible (requiring the attacker to send
28251 on the order of zettabytes of altered cells in a short interval),
28252 but we'd rather block them off in case there are any classes of
28253 this attack that we missed. Reported by Willem Pinckaers.
28255 o Minor features (also part of 0.2.2.33):
28256 - Adjust the expiration time on our SSL session certificates to
28257 better match SSL certs seen in the wild. Resolves ticket 4014.
28258 - Change the default required uptime for a relay to be accepted as
28259 a HSDir (hidden service directory) from 24 hours to 25 hours.
28260 Improves on 0.2.0.10-alpha; resolves ticket 2649.
28261 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
28262 authorities to abstain from voting on assignment of the HSDir
28263 consensus flag. Related to bug 2649.
28264 - Update to the September 6 2011 Maxmind GeoLite Country database.
28266 o Minor bugfixes (also part of 0.2.2.33):
28267 - Demote the 'replay detected' log message emitted when a hidden
28268 service receives the same Diffie-Hellman public key in two different
28269 INTRODUCE2 cells to info level. A normal Tor client can cause that
28270 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
28271 fixes part of bug 2442.
28272 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
28273 level. There is nothing that a hidden service's operator can do
28274 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
28276 - Clarify a log message specifying the characters permitted in
28277 HiddenServiceAuthorizeClient client names. Previously, the log
28278 message said that "[A-Za-z0-9+-_]" were permitted; that could have
28279 given the impression that every ASCII character between "+" and "_"
28280 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
28282 o Build fixes (also part of 0.2.2.33):
28283 - Clean up some code issues that prevented Tor from building on older
28284 BSDs. Fixes bug 3894; reported by "grarpamp".
28285 - Search for a platform-specific version of "ar" when cross-compiling.
28286 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
28289 - Fix a bug where the SocksPort option (for example) would get
28290 ignored and replaced by the default if a SocksListenAddress
28291 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
28295 - Relays now try regenerating and uploading their descriptor more
28296 frequently if they are not listed in the consensus, or if the
28297 version of their descriptor listed in the consensus is too
28298 old. This fix should prevent situations where a server declines
28299 to re-publish itself because it has done so too recently, even
28300 though the authorities decided not to list its recent-enough
28301 descriptor. Fix for bug 3327.
28304 - Relays now include a reason for regenerating their descriptors
28305 in an HTTP header when uploading to the authorities. This will
28306 make it easier to debug descriptor-upload issues in the future.
28307 - When starting as root and then changing our UID via the User
28308 control option, and we have a ControlSocket configured, make sure
28309 that the ControlSocket is owned by the same account that Tor will
28310 run under. Implements ticket 3421; fix by Jérémy Bobbio.
28313 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
28314 utility function used in the control-port code). This shouldn't
28315 ever happen unless Tor is completely out of memory, but if it did
28316 happen and Tor somehow recovered from it, Tor could have sent a log
28317 message to a control port in the middle of a reply to a controller
28318 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
28319 - Make 'FetchUselessDescriptors' cause all descriptor types and
28320 all consensus types (including microdescriptors) to get fetched.
28321 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
28323 o Code refactoring:
28324 - Make a new "entry connection" struct as an internal subtype of "edge
28325 connection", to simplify the code and make exit connections smaller.
28328 Changes in version 0.2.2.33 - 2011-09-13
28329 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
28330 TLS handshake that makes relays and bridges that run this new version
28331 reachable from Iran again.
28334 - Avoid an assertion failure when reloading a configuration with
28335 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
28336 3923; bugfix on 0.2.2.25-alpha.
28338 o Minor features (security):
28339 - Check for replays of the public-key encrypted portion of an
28340 INTRODUCE1 cell, in addition to the current check for replays of
28341 the g^x value. This prevents a possible class of active attacks
28342 by an attacker who controls both an introduction point and a
28343 rendezvous point, and who uses the malleability of AES-CTR to
28344 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
28345 that these attacks are infeasible (requiring the attacker to send
28346 on the order of zettabytes of altered cells in a short interval),
28347 but we'd rather block them off in case there are any classes of
28348 this attack that we missed. Reported by Willem Pinckaers.
28351 - Adjust the expiration time on our SSL session certificates to
28352 better match SSL certs seen in the wild. Resolves ticket 4014.
28353 - Change the default required uptime for a relay to be accepted as
28354 a HSDir (hidden service directory) from 24 hours to 25 hours.
28355 Improves on 0.2.0.10-alpha; resolves ticket 2649.
28356 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
28357 authorities to abstain from voting on assignment of the HSDir
28358 consensus flag. Related to bug 2649.
28359 - Update to the September 6 2011 Maxmind GeoLite Country database.
28361 o Minor bugfixes (documentation and log messages):
28362 - Correct the man page to explain that HashedControlPassword and
28363 CookieAuthentication can both be set, in which case either method
28364 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28365 when we decided to allow these config options to both be set. Issue
28366 raised by bug 3898.
28367 - Demote the 'replay detected' log message emitted when a hidden
28368 service receives the same Diffie-Hellman public key in two different
28369 INTRODUCE2 cells to info level. A normal Tor client can cause that
28370 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
28371 fixes part of bug 2442.
28372 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
28373 level. There is nothing that a hidden service's operator can do
28374 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
28376 - Clarify a log message specifying the characters permitted in
28377 HiddenServiceAuthorizeClient client names. Previously, the log
28378 message said that "[A-Za-z0-9+-_]" were permitted; that could have
28379 given the impression that every ASCII character between "+" and "_"
28380 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
28383 - Provide a substitute implementation of lround() for MSVC, which
28384 apparently lacks it. Patch from Gisle Vanem.
28385 - Clean up some code issues that prevented Tor from building on older
28386 BSDs. Fixes bug 3894; reported by "grarpamp".
28387 - Search for a platform-specific version of "ar" when cross-compiling.
28388 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
28391 Changes in version 0.2.3.3-alpha - 2011-09-01
28392 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
28393 security, and provides client-side support for the microdescriptor
28394 and optimistic data features introduced earlier in the 0.2.3.x
28395 series. It also includes numerous critical bugfixes in the (optional)
28396 bufferevent-based networking backend.
28398 o Major features (stream isolation):
28399 - You can now configure Tor so that streams from different
28400 applications are isolated on different circuits, to prevent an
28401 attacker who sees your streams as they leave an exit node from
28402 linking your sessions to one another. To do this, choose some way
28403 to distinguish the applications: have them connect to different
28404 SocksPorts, or have one of them use SOCKS4 while the other uses
28405 SOCKS5, or have them pass different authentication strings to the
28406 SOCKS proxy. Then, use the new SocksPort syntax to configure the
28407 degree of isolation you need. This implements Proposal 171.
28408 - There's a new syntax for specifying multiple client ports (such as
28409 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
28410 multiple *Port entries with full addr:port syntax on each.
28411 The old *ListenAddress format is still supported, but you can't
28412 mix it with the new *Port syntax.
28414 o Major features (other):
28415 - Enable microdescriptor fetching by default for clients. This allows
28416 clients to download a much smaller amount of directory information.
28417 To disable it (and go back to the old-style consensus and
28418 descriptors), set "UseMicrodescriptors 0" in your torrc file.
28419 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
28420 "PortForwarding" config option), now supports Windows.
28421 - When using an exit relay running 0.2.3.x, clients can now
28422 "optimistically" send data before the exit relay reports that
28423 the stream has opened. This saves a round trip when starting
28424 connections where the client speaks first (such as web browsing).
28425 This behavior is controlled by a consensus parameter (currently
28426 disabled). To turn it on or off manually, use the "OptimisticData"
28427 torrc option. Implements proposal 181; code by Ian Goldberg.
28429 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
28430 - When using IOCP on Windows, we need to enable Libevent windows
28432 - The IOCP backend now works even when the user has not specified
28433 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
28434 Fixes part of bug 3752.
28435 - Correctly record the bytes we've read and written when using
28436 bufferevents, so that we can include them in our bandwidth history
28437 and advertised bandwidth. Fixes bug 3803.
28438 - Apply rate-limiting only at the bottom of a chain of filtering
28439 bufferevents. This prevents us from filling up internal read
28440 buffers and violating rate-limits when filtering bufferevents
28441 are enabled. Fixes part of bug 3804.
28442 - Add high-watermarks to the output buffers for filtered
28443 bufferevents. This prevents us from filling up internal write
28444 buffers and wasting CPU cycles when filtering bufferevents are
28445 enabled. Fixes part of bug 3804.
28446 - Correctly notice when data has been written from a bufferevent
28447 without flushing it completely. Fixes bug 3805.
28448 - Fix a bug where server-side tunneled bufferevent-based directory
28449 streams would get closed prematurely. Fixes bug 3814.
28450 - Fix a use-after-free error with per-connection rate-limiting
28451 buckets. Fixes bug 3888.
28453 o Major bugfixes (also part of 0.2.2.31-rc):
28454 - If we're configured to write our ControlPorts to disk, only write
28455 them after switching UID and creating the data directory. This way,
28456 we don't fail when starting up with a nonexistent DataDirectory
28457 and a ControlPortWriteToFile setting based on that directory. Fixes
28458 bug 3747; bugfix on Tor 0.2.2.26-beta.
28461 - Added a new CONF_CHANGED event so that controllers can be notified
28462 of any configuration changes made by other controllers, or by the
28463 user. Implements ticket 1692.
28464 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
28465 leak when using bufferevents, and lets Libevent worry about how to
28466 best copy data out of a buffer.
28467 - Replace files in stats/ rather than appending to them. Now that we
28468 include statistics in extra-info descriptors, it makes no sense to
28469 keep old statistics forever. Implements ticket 2930.
28471 o Minor features (build compatibility):
28472 - Limited, experimental support for building with nmake and MSVC.
28473 - Provide a substitute implementation of lround() for MSVC, which
28474 apparently lacks it. Patch from Gisle Vanem.
28476 o Minor features (also part of 0.2.2.31-rc):
28477 - Update to the August 2 2011 Maxmind GeoLite Country database.
28479 o Minor bugfixes (on 0.2.3.x-alpha):
28480 - Fix a spurious warning when parsing SOCKS requests with
28481 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
28482 - Get rid of a harmless warning that could happen on relays running
28483 with bufferevents. The warning was caused by someone doing an http
28484 request to a relay's orport. Also don't warn for a few related
28485 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
28487 o Minor bugfixes (on 2.2.x and earlier):
28488 - Correct the man page to explain that HashedControlPassword and
28489 CookieAuthentication can both be set, in which case either method
28490 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28491 when we decided to allow these config options to both be set. Issue
28492 raised by bug 3898.
28493 - The "--quiet" and "--hush" options now apply not only to Tor's
28494 behavior before logs are configured, but also to Tor's behavior in
28495 the absence of configured logs. Fixes bug 3550; bugfix on
28498 o Minor bugfixes (also part of 0.2.2.31-rc):
28499 - Write several files in text mode, on OSes that distinguish text
28500 mode from binary mode (namely, Windows). These files are:
28501 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28502 that collect those statistics; 'client_keys' and 'hostname' for
28503 hidden services that use authentication; and (in the tor-gencert
28504 utility) newly generated identity and signing keys. Previously,
28505 we wouldn't specify text mode or binary mode, leading to an
28506 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28507 the DirRecordUsageByCountry option which would have triggered
28508 the assertion failure was added), although this assertion failure
28509 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28510 - Selectively disable deprecation warnings on OS X because Lion
28511 started deprecating the shipped copy of openssl. Fixes bug 3643.
28512 - Remove an extra pair of quotation marks around the error
28513 message in control-port STATUS_GENERAL BUG events. Bugfix on
28514 0.1.2.6-alpha; fixes bug 3732.
28515 - When unable to format an address as a string, report its value
28516 as "???" rather than reusing the last formatted address. Bugfix
28519 o Code simplifications and refactoring:
28520 - Rewrite the listener-selection logic so that parsing which ports
28521 we want to listen on is now separate from binding to the ports
28525 - Building Tor with bufferevent support now requires Libevent
28526 2.0.13-stable or later. Previous versions of Libevent had bugs in
28527 SSL-related bufferevents and related issues that would make Tor
28528 work badly with bufferevents. Requiring 2.0.13-stable also allows
28529 Tor with bufferevents to take advantage of Libevent APIs
28530 introduced after 2.0.8-rc.
28533 Changes in version 0.2.2.32 - 2011-08-27
28534 The Tor 0.2.2 release series is dedicated to the memory of Andreas
28535 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
28536 a founder of the PETS community, a leader in our field, a mentor,
28537 and a friend. He left us with these words: "I had the possibility
28538 to contribute to this world that is not as it should be. I hope I
28539 could help in some areas to make the world a better place, and that
28540 I could also encourage other people to be engaged in improving the
28541 world. Please, stay engaged. This world needs you, your love, your
28542 initiative -- now I cannot be part of that anymore."
28544 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
28545 ready. More than two years in the making, this release features improved
28546 client performance and hidden service reliability, better compatibility
28547 for Android, correct behavior for bridges that listen on more than
28548 one address, more extensible and flexible directory object handling,
28549 better reporting of network statistics, improved code security, and
28550 many many other features and bugfixes.
28553 Changes in version 0.2.2.31-rc - 2011-08-17
28554 Tor 0.2.2.31-rc is the second and hopefully final release candidate
28555 for the Tor 0.2.2.x series.
28558 - Remove an extra pair of quotation marks around the error
28559 message in control-port STATUS_GENERAL BUG events. Bugfix on
28560 0.1.2.6-alpha; fixes bug 3732.
28561 - If we're configured to write our ControlPorts to disk, only write
28562 them after switching UID and creating the data directory. This way,
28563 we don't fail when starting up with a nonexistent DataDirectory
28564 and a ControlPortWriteToFile setting based on that directory. Fixes
28565 bug 3747; bugfix on Tor 0.2.2.26-beta.
28568 - Update to the August 2 2011 Maxmind GeoLite Country database.
28571 - Allow GETINFO fingerprint to return a fingerprint even when
28572 we have not yet built a router descriptor. Fixes bug 3577;
28573 bugfix on 0.2.0.1-alpha.
28574 - Write several files in text mode, on OSes that distinguish text
28575 mode from binary mode (namely, Windows). These files are:
28576 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28577 that collect those statistics; 'client_keys' and 'hostname' for
28578 hidden services that use authentication; and (in the tor-gencert
28579 utility) newly generated identity and signing keys. Previously,
28580 we wouldn't specify text mode or binary mode, leading to an
28581 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28582 the DirRecordUsageByCountry option which would have triggered
28583 the assertion failure was added), although this assertion failure
28584 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28585 - Selectively disable deprecation warnings on OS X because Lion
28586 started deprecating the shipped copy of openssl. Fixes bug 3643.
28587 - When unable to format an address as a string, report its value
28588 as "???" rather than reusing the last formatted address. Bugfix
28592 Changes in version 0.2.3.2-alpha - 2011-07-18
28593 Tor 0.2.3.2-alpha introduces two new experimental features:
28594 microdescriptors and pluggable transports. It also continues cleaning
28595 up a variety of recently introduced features.
28598 - Clients can now use microdescriptors instead of regular descriptors
28599 to build circuits. Microdescriptors are authority-generated
28600 summaries of regular descriptors' contents, designed to change
28601 very rarely (see proposal 158 for details). This feature is
28602 designed to save bandwidth, especially for clients on slow internet
28603 connections. It's off by default for now, since nearly no caches
28604 support it, but it will be on-by-default for clients in a future
28605 version. You can use the UseMicrodescriptors option to turn it on.
28606 - Tor clients using bridges can now be configured to use a separate
28607 'transport' proxy for each bridge. This approach helps to resist
28608 censorship by allowing bridges to use protocol obfuscation
28609 plugins. It implements part of proposal 180. Implements ticket 2841.
28610 - While we're trying to bootstrap, record how many TLS connections
28611 fail in each state, and report which states saw the most failures
28612 in response to any bootstrap failures. This feature may speed up
28613 diagnosis of censorship events. Implements ticket 3116.
28615 o Major bugfixes (on 0.2.3.1-alpha):
28616 - When configuring a large set of nodes in EntryNodes (as with
28617 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
28618 random subset to be guards, and choose them in random
28619 order. Fixes bug 2798.
28620 - Tor could crash when remembering a consensus in a non-used consensus
28621 flavor without having a current consensus set. Fixes bug 3361.
28622 - Comparing an unknown address to a microdescriptor's shortened exit
28623 policy would always give a "rejected" result. Fixes bug 3599.
28624 - Using microdescriptors as a client no longer prevents Tor from
28625 uploading and downloading hidden service descriptors. Fixes
28629 - Allow nameservers with IPv6 address. Resolves bug 2574.
28630 - Accept attempts to include a password authenticator in the
28631 handshake, as supported by SOCKS5. This handles SOCKS clients that
28632 don't know how to omit a password when authenticating. Resolves
28634 - When configuring a large set of nodes in EntryNodes, and there are
28635 enough of them listed as Guard so that we don't need to consider
28636 the non-guard entries, prefer the ones listed with the Guard flag.
28637 - Check for and recover from inconsistency in the microdescriptor
28638 cache. This will make it harder for us to accidentally free a
28639 microdescriptor without removing it from the appropriate data
28640 structures. Fixes issue 3135; issue noted by "wanoskarnet".
28641 - Log SSL state transitions at log level DEBUG, log domain
28642 HANDSHAKE. This can be useful for debugging censorship events.
28643 Implements ticket 3264.
28644 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
28645 implements ticket 3439.
28647 o Minor bugfixes (on 0.2.3.1-alpha):
28648 - Do not free all general-purpose regular descriptors just
28649 because microdescriptor use is enabled. Fixes bug 3113.
28650 - Correctly link libevent_openssl when --enable-static-libevent
28651 is passed to configure. Fixes bug 3118.
28652 - Bridges should not complain during their heartbeat log messages that
28653 they are unlisted in the consensus: that's more or less the point
28654 of being a bridge. Fixes bug 3183.
28655 - Report a SIGNAL event to controllers when acting on a delayed
28656 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
28657 event to the controller if we acted on a SIGNAL NEWNYM command
28658 immediately, and otherwise not report a SIGNAL event for the
28659 command at all. Fixes bug 3349.
28660 - Fix a crash when handling the SIGNAL controller command or
28661 reporting ERR-level status events with bufferevents enabled. Found
28662 by Robert Ransom. Fixes bug 3367.
28663 - Always ship the tor-fw-helper manpage in our release tarballs.
28664 Fixes bug 3389. Reported by Stephen Walker.
28665 - Fix a class of double-mark-for-close bugs when bufferevents
28666 are enabled. Fixes bug 3403.
28667 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
28668 - Add SIGNAL to the list returned by the 'GETINFO events/names'
28669 control-port command. Fixes part of bug 3465.
28670 - Prevent using negative indices during unit test runs when read_all()
28671 fails. Spotted by coverity.
28672 - Fix a rare memory leak when checking the nodelist without it being
28673 present. Found by coverity.
28674 - Only try to download a microdescriptor-flavored consensus from
28675 a directory cache that provides them.
28677 o Minor bugfixes (on 0.2.2.x and earlier):
28678 - Assert that hidden-service-related operations are not performed
28679 using single-hop circuits. Previously, Tor would assert that
28680 client-side streams are not attached to single-hop circuits,
28681 but not that other sensitive operations on the client and service
28682 side are not performed using single-hop circuits. Fixes bug 3332;
28684 - Don't publish a new relay descriptor when we reload our onion key,
28685 unless the onion key has actually changed. Fixes bug 3263 and
28686 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
28687 - Allow GETINFO fingerprint to return a fingerprint even when
28688 we have not yet built a router descriptor. Fixes bug 3577;
28689 bugfix on 0.2.0.1-alpha.
28690 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
28691 on 0.2.2.4-alpha; fixes bug 3427.
28693 o Code simplification and refactoring:
28694 - Use tor_sscanf() in place of scanf() in more places through the
28695 code. This makes us a little more locale-independent, and
28696 should help shut up code-analysis tools that can't tell
28697 a safe sscanf string from a dangerous one.
28698 - Use tt_assert(), not tor_assert(), for checking for test failures.
28699 This makes the unit tests more able to go on in the event that
28701 - Split connection_about_to_close() into separate functions for each
28705 - On Windows, we now define the _WIN32_WINNT macros only if they
28706 are not already defined. This lets the person building Tor decide,
28707 if they want, to require a later version of Windows.
28710 Changes in version 0.2.2.30-rc - 2011-07-07
28711 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
28712 series. It fixes a few smaller bugs, but generally appears stable.
28713 Please test it and let us know whether it is!
28716 - Send a SUCCEEDED stream event to the controller when a reverse
28717 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
28718 discovered by katmagic.
28719 - Always NUL-terminate the sun_path field of a sockaddr_un before
28720 passing it to the kernel. (Not a security issue: kernels are
28721 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28722 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28723 - Don't stack-allocate the list of supplementary GIDs when we're
28724 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28725 could take up to 256K, which is way too much stack. Found by
28726 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28727 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
28728 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
28729 fixes part of bug 3465.
28730 - Fix a memory leak when receiving a descriptor for a hidden
28731 service we didn't ask for. Found by Coverity; CID #30. Bugfix
28735 - Update to the July 1 2011 Maxmind GeoLite Country database.
28738 Changes in version 0.2.2.29-beta - 2011-06-20
28739 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
28740 have bridge lines in their torrc but don't want to use them; gets
28741 us closer to having the control socket feature working on Debian;
28742 and fixes a variety of smaller bugs.
28745 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
28746 When we changed the default behavior to "use bridges if any
28747 are listed in the torrc", we surprised users who had bridges
28748 in their torrc files but who didn't actually want to use them.
28749 Partial resolution for bug 3354.
28752 - Don't attach new streams to old rendezvous circuits after SIGNAL
28753 NEWNYM. Previously, we would keep using an existing rendezvous
28754 circuit if it remained open (i.e. if it were kept open by a
28755 long-lived stream, or if a new stream were attached to it before
28756 Tor could notice that it was old and no longer in use). Bugfix on
28757 0.1.1.15-rc; fixes bug 3375.
28760 - Fix a bug when using ControlSocketsGroupWritable with User. The
28761 directory's group would be checked against the current group, not
28762 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
28763 bugfix on 0.2.2.26-beta.
28764 - Make connection_printf_to_buf()'s behavior sane. Its callers
28765 expect it to emit a CRLF iff the format string ends with CRLF;
28766 it actually emitted a CRLF iff (a) the format string ended with
28767 CRLF or (b) the resulting string was over 1023 characters long or
28768 (c) the format string did not end with CRLF *and* the resulting
28769 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
28770 fixes part of bug 3407.
28771 - Make send_control_event_impl()'s behavior sane. Its callers
28772 expect it to always emit a CRLF at the end of the string; it
28773 might have emitted extra control characters as well. Bugfix on
28774 0.1.1.9-alpha; fixes another part of bug 3407.
28775 - Make crypto_rand_int() check the value of its input correctly.
28776 Previously, it accepted values up to UINT_MAX, but could return a
28777 negative number if given a value above INT_MAX+1. Found by George
28778 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
28779 - Avoid a segfault when reading a malformed circuit build state
28780 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
28782 - When asked about a DNS record type we don't support via a
28783 client DNSPort, reply with NOTIMPL rather than an empty
28784 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
28785 - Fix a rare memory leak during stats writing. Found by coverity.
28788 - Update to the June 1 2011 Maxmind GeoLite Country database.
28790 o Code simplifications and refactoring:
28791 - Remove some dead code as indicated by coverity.
28792 - Remove a few dead assignments during router parsing. Found by
28794 - Add some forgotten return value checks during unit tests. Found
28796 - Don't use 1-bit wide signed bit fields. Found by coverity.
28799 Changes in version 0.2.2.28-beta - 2011-06-04
28800 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
28801 fixed a big bug in whether relays stay in the consensus consistently,
28802 we moved closer to handling bridges and hidden services correctly,
28803 and we started the process of better handling the dreaded "my Vidalia
28804 died, and now my Tor demands a password when I try to reconnect to it"
28808 - Don't decide to make a new descriptor when receiving a HUP signal.
28809 This bug has caused a lot of 0.2.2.x relays to disappear from the
28810 consensus periodically. Fixes the most common case of triggering
28811 bug 1810; bugfix on 0.2.2.7-alpha.
28812 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
28813 - Don't try to build descriptors if "ORPort auto" is set and we
28814 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
28816 - Resolve a crash that occurred when setting BridgeRelay to 1 with
28817 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
28818 - Apply circuit timeouts to opened hidden-service-related circuits
28819 based on the correct start time. Previously, we would apply the
28820 circuit build timeout based on time since the circuit's creation;
28821 it was supposed to be applied based on time since the circuit
28822 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
28823 - Use the same circuit timeout for client-side introduction
28824 circuits as for other four-hop circuits, rather than the timeout
28825 for single-hop directory-fetch circuits; the shorter timeout may
28826 have been appropriate with the static circuit build timeout in
28827 0.2.1.x and earlier, but caused many hidden service access attempts
28828 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
28829 on 0.2.2.2-alpha; fixes another part of bug 1297.
28830 - In ticket 2511 we fixed a case where you could use an unconfigured
28831 bridge if you had configured it as a bridge the last time you ran
28832 Tor. Now fix another edge case: if you had configured it as a bridge
28833 but then switched to a different bridge via the controller, you
28834 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
28838 - Add an __OwningControllerProcess configuration option and a
28839 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
28840 that when it exits, Tor will shut down. Implements feature 3049.
28841 - If "UseBridges 1" is set and no bridges are configured, Tor will
28842 now refuse to build any circuits until some bridges are set.
28843 If "UseBridges auto" is set, Tor will use bridges if they are
28844 configured and we are not running as a server, but otherwise will
28845 make circuits as usual. The new default is "auto". Patch by anonym,
28846 so the Tails LiveCD can stop automatically revealing you as a Tor
28850 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28851 - Remove a trailing asterisk from "exit-policy/default" in the
28852 output of the control port command "GETINFO info/names". Bugfix
28854 - Use a wide type to hold sockets when built for 64-bit Windows builds.
28856 - Warn when the user configures two HiddenServiceDir lines that point
28857 to the same directory. Bugfix on 0.0.6 (the version introducing
28858 HiddenServiceDir); fixes bug 3289.
28859 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
28860 part of bug 2748; bugfix on 0.2.0.10-alpha.
28861 - Log malformed requests for rendezvous descriptors as protocol
28862 warnings, not warnings. Also, use a more informative log message
28863 in case someone sees it at log level warning without prior
28864 info-level messages. Fixes the other part of bug 2748; bugfix
28866 - Clear the table recording the time of the last request for each
28867 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
28868 Previously, we would clear our HS descriptor cache on SIGNAL
28869 NEWNYM, but if we had previously retrieved a descriptor (or tried
28870 to) from every directory responsible for it, we would refuse to
28871 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
28873 - Fix a log message that said "bits" while displaying a value in
28874 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
28876 - When checking for 1024-bit keys, check for 1024 bits, not 128
28877 bytes. This allows Tor to correctly discard keys of length 1017
28878 through 1023. Bugfix on 0.0.9pre5.
28881 - Relays now log the reason for publishing a new relay descriptor,
28882 so we have a better chance of hunting down instances of bug 1810.
28883 Resolves ticket 3252.
28884 - Revise most log messages that refer to nodes by nickname to
28885 instead use the "$key=nickname at address" format. This should be
28886 more useful, especially since nicknames are less and less likely
28887 to be unique. Resolves ticket 3045.
28888 - Log (at info level) when purging pieces of hidden-service-client
28889 state because of SIGNAL NEWNYM.
28892 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28893 anything since 0.2.1.16-rc.
28896 Changes in version 0.2.2.27-beta - 2011-05-18
28897 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
28898 release, and also adds a few more general bugfixes.
28901 - Fix a crash bug when changing bridges in a running Tor process.
28902 Fixes bug 3213; bugfix on 0.2.2.26-beta.
28903 - When the controller configures a new bridge, don't wait 10 to 60
28904 seconds before trying to fetch its descriptor. Bugfix on
28905 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
28908 - Require that onion keys have exponent 65537 in microdescriptors too.
28909 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
28910 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
28911 Changed the limit to 512 characters by removing base64 newlines.
28912 Fixes bug 2752. Fix by Michael Yakubovich.
28913 - When a client starts or stops using bridges, never use a circuit
28914 that was built before the configuration change. This behavior could
28915 put at risk a user who uses bridges to ensure that her traffic
28916 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
28920 Changes in version 0.2.2.26-beta - 2011-05-17
28921 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
28922 also introduces a new "socksport auto" approach that should make it
28923 easier to run multiple Tors on the same system, and does a lot of
28924 cleanup to get us closer to a release candidate.
28926 o Security/privacy fixes:
28927 - Replace all potentially sensitive memory comparison operations
28928 with versions whose runtime does not depend on the data being
28929 compared. This will help resist a class of attacks where an
28930 adversary can use variations in timing information to learn
28931 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28932 implementation by Robert Ransom based partially on code by DJB.)
28933 - When receiving a hidden service descriptor, check that it is for
28934 the hidden service we wanted. Previously, Tor would store any
28935 hidden service descriptors that a directory gave it, whether it
28936 wanted them or not. This wouldn't have let an attacker impersonate
28937 a hidden service, but it did let directories pre-seed a client
28938 with descriptors that it didn't want. Bugfix on 0.0.6.
28939 - On SIGHUP, do not clear out all TrackHostExits mappings, client
28940 DNS cache entries, and virtual address mappings: that's what
28941 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
28944 - The options SocksPort, ControlPort, and so on now all accept a
28945 value "auto" that opens a socket on an OS-selected port. A
28946 new ControlPortWriteToFile option tells Tor to write its
28947 actual control port or ports to a chosen file. If the option
28948 ControlPortFileGroupReadable is set, the file is created as
28949 group-readable. Now users can run two Tor clients on the same
28950 system without needing to manually mess with parameters. Resolves
28951 part of ticket 3076.
28952 - Set SO_REUSEADDR on all sockets, not just listeners. This should
28953 help busy exit nodes avoid running out of useable ports just
28954 because all the ports have been used in the near past. Resolves
28958 - New "GETINFO net/listeners/(type)" controller command to return
28959 a list of addresses and ports that are bound for listeners for a
28960 given connection type. This is useful when the user has configured
28961 "SocksPort auto" and the controller needs to know which port got
28962 chosen. Resolves another part of ticket 3076.
28963 - Add a new ControlSocketsGroupWritable configuration option: when
28964 it is turned on, ControlSockets are group-writeable by the default
28965 group of the current user. Patch by Jérémy Bobbio; implements
28967 - Tor now refuses to create a ControlSocket in a directory that is
28968 world-readable (or group-readable if ControlSocketsGroupWritable
28969 is 0). This is necessary because some operating systems do not
28970 enforce permissions on an AF_UNIX sockets. Permissions on the
28971 directory holding the socket, however, seems to work everywhere.
28972 - Rate-limit a warning about failures to download v2 networkstatus
28973 documents. Resolves part of bug 1352.
28974 - Backport code from 0.2.3.x that allows directory authorities to
28975 clean their microdescriptor caches. Needed to resolve bug 2230.
28976 - When an HTTPS proxy reports "403 Forbidden", we now explain
28977 what it means rather than calling it an unexpected status code.
28978 Closes bug 2503. Patch from Michael Yakubovich.
28979 - Update to the May 1 2011 Maxmind GeoLite Country database.
28982 - Authorities now clean their microdesc cache periodically and when
28983 reading from disk initially, not only when adding new descriptors.
28984 This prevents a bug where we could lose microdescriptors. Bugfix
28985 on 0.2.2.6-alpha. Fixes bug 2230.
28986 - Do not crash when our configuration file becomes unreadable, for
28987 example due to a permissions change, between when we start up
28988 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28990 - Avoid a bug that would keep us from replacing a microdescriptor
28991 cache on Windows. (We would try to replace the file while still
28992 holding it open. That's fine on Unix, but Windows doesn't let us
28993 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
28994 - Add missing explanations for the authority-related torrc options
28995 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
28996 man page. Resolves issue 2379.
28997 - As an authority, do not upload our own vote or signature set to
28998 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
28999 it would get flagged as a duplicate. Resolves bug 3026.
29000 - Accept hidden service descriptors if we think we might be a hidden
29001 service directory, regardless of what our consensus says. This
29002 helps robustness, since clients and hidden services can sometimes
29003 have a more up-to-date view of the network consensus than we do,
29004 and if they think that the directory authorities list us a HSDir,
29005 we might actually be one. Related to bug 2732; bugfix on
29007 - When a controller changes TrackHostExits, remove mappings for
29008 hosts that should no longer have their exits tracked. Bugfix on
29010 - When a controller changes VirtualAddrNetwork, remove any mappings
29011 for hosts that were automapped to the old network. Bugfix on
29013 - When a controller changes one of the AutomapHosts* options, remove
29014 any mappings for hosts that should no longer be automapped. Bugfix
29016 - Do not reset the bridge descriptor download status every time we
29017 re-parse our configuration or get a configuration change. Fixes
29018 bug 3019; bugfix on 0.2.0.3-alpha.
29020 o Minor bugfixes (code cleanup):
29021 - When loading the microdesc journal, remember its current size.
29022 In 0.2.2, this helps prevent the microdesc journal from growing
29023 without limit on authorities (who are the only ones to use it in
29024 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
29025 Fix posted by "cypherpunks."
29026 - The microdesc journal is supposed to get rebuilt only if it is
29027 at least _half_ the length of the store, not _twice_ the length
29028 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
29029 - Fix a potential null-pointer dereference while computing a
29030 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
29032 - Avoid a possible null-pointer dereference when rebuilding the mdesc
29033 cache without actually having any descriptors to cache. Bugfix on
29034 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
29035 - If we fail to compute the identity digest of a v3 legacy keypair,
29036 warn, and don't use a buffer-full of junk instead. Bugfix on
29037 0.2.1.1-alpha; fixes bug 3106.
29038 - Resolve an untriggerable issue in smartlist_string_num_isin(),
29039 where if the function had ever in the future been used to check
29040 for the presence of a too-large number, it would have given an
29041 incorrect result. (Fortunately, we only used it for 16-bit
29042 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
29043 - Require that introduction point keys and onion handshake keys
29044 have a public exponent of 65537. Starts to fix bug 3207; bugfix
29047 o Removed features:
29048 - Caches no longer download and serve v2 networkstatus documents
29049 unless FetchV2Networkstatus flag is set: these documents haven't
29050 haven't been used by clients or relays since 0.2.0.x. Resolves
29054 Changes in version 0.2.3.1-alpha - 2011-05-05
29055 Tor 0.2.3.1-alpha adds some new experimental features, including support
29056 for an improved network IO backend, IOCP networking on Windows,
29057 microdescriptor caching, "fast-start" support for streams, and automatic
29058 home router configuration. There are also numerous internal improvements
29059 to try to make the code easier for developers to work with.
29061 This is the first alpha release in a new series, so expect there to be
29062 bugs. Users who would rather test out a more stable branch should
29063 stay with 0.2.2.x for now.
29066 - Tor can now optionally build with the "bufferevents" buffered IO
29067 backend provided by Libevent 2. To use this feature, make sure you
29068 have the latest possible version of Libevent, and pass the
29069 --enable-bufferevents flag to configure when building Tor from
29070 source. This feature will make our networking code more flexible,
29071 let us stack layers on each other, and let us use more efficient
29072 zero-copy transports where available.
29073 - As an experimental feature, Tor can use IOCP for networking on Windows.
29074 Once this code is tuned and optimized, it promises much better
29075 performance than the select-based backend we've used in the past. To
29076 try this feature, you must build Tor with Libevent 2, configure Tor
29077 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
29078 your torrc. There are known bugs here: only try this if you can help
29079 debug it as it breaks.
29080 - The EntryNodes option can now include country codes like {de} or IP
29081 addresses or network masks. Previously we had disallowed these options
29082 because we didn't have an efficient way to keep the list up to
29083 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
29084 - Exit nodes now accept and queue data on not-yet-connected streams.
29085 Previously, the client wasn't allowed to send data until the stream was
29086 connected, which slowed down all connections. This change will enable
29087 clients to perform a "fast-start" on streams and send data without
29088 having to wait for a confirmation that the stream has opened. (Patch
29089 from Ian Goldberg; implements the server side of Proposal 174.)
29090 - Tor now has initial support for automatic port mapping on the many
29091 home routers that support NAT-PMP or UPnP. (Not yet supported on
29092 Windows). To build the support code, you'll need to have libnatpnp
29093 library and/or the libminiupnpc library, and you'll need to enable the
29094 feature specifically by passing "--enable-upnp" and/or
29095 "--enable-natpnp" to configure. To turn it on, use the new
29096 PortForwarding option.
29097 - Caches now download, cache, and serve multiple "flavors" of the
29098 consensus, including a flavor that describes microdescriptors.
29099 - Caches now download, cache, and serve microdescriptors -- small
29100 summaries of router descriptors that are authenticated by all of the
29101 directory authorities. Once enough caches are running this code,
29102 clients will be able to save significant amounts of directory bandwidth
29103 by downloading microdescriptors instead of router descriptors.
29106 - Make logging resolution configurable with a new LogTimeGranularity
29107 option, and change the default from 1 millisecond to 1 second.
29108 Implements enhancement 1668.
29109 - We log which torrc file we're using on startup. Implements ticket
29111 - Ordinarily, Tor does not count traffic from private addresses (like
29112 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
29113 There is now a new option, CountPrivateBandwidth, to disable this
29114 behavior. Patch from Daniel Cagara.
29115 - New --enable-static-tor configure option for building Tor as
29116 statically as possible. Idea, general hackery and thoughts from
29117 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
29119 - If you set the NumCPUs option to 0, Tor will now try to detect how
29120 many CPUs you have. This is the new default behavior.
29121 - Turn on directory request statistics by default and include them in
29122 extra-info descriptors. Don't break if we have no GeoIP database.
29123 - Relays that set "ConnDirectionStatistics 1" write statistics on the
29124 bidirectional use of connections to disk every 24 hours.
29125 - Add a GeoIP file digest to the extra-info descriptor. Implements
29127 - The NodeFamily option -- which let you declare that you want to
29128 consider nodes to be part of a family whether they list themselves
29129 that way or not -- now allows IP address ranges and country codes.
29130 - Add a new 'Heartbeat' log message type to periodically log a message
29131 describing Tor's status at level Notice. This feature is meant for
29132 operators who log at notice, and want to make sure that their Tor
29133 server is still working. Implementation by George Kadianakis.
29135 o Minor bugfixes (on 0.2.2.25-alpha):
29136 - When loading the microdesc journal, remember its current size.
29137 In 0.2.2, this helps prevent the microdesc journal from growing
29138 without limit on authorities (who are the only ones to use it in
29139 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
29140 Fix posted by "cypherpunks."
29141 - The microdesc journal is supposed to get rebuilt only if it is
29142 at least _half_ the length of the store, not _twice_ the length
29143 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
29144 - If as an authority we fail to compute the identity digest of a v3
29145 legacy keypair, warn, and don't use a buffer-full of junk instead.
29146 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
29147 - Authorities now clean their microdesc cache periodically and when
29148 reading from disk initially, not only when adding new descriptors.
29149 This prevents a bug where we could lose microdescriptors. Bugfix
29152 o Minor features (controller):
29153 - Add a new SIGNAL event to the controller interface so that
29154 controllers can be notified when Tor handles a signal. Resolves
29155 issue 1955. Patch by John Brooks.
29156 - Add a new GETINFO option to get total bytes read and written. Patch
29157 from pipe, revised by atagar. Resolves ticket 2345.
29158 - Implement some GETINFO controller fields to provide information about
29159 the Tor process's pid, euid, username, and resource limits.
29162 - Our build system requires automake 1.6 or later to create the
29163 Makefile.in files. Previously, you could have used 1.4.
29164 This only affects developers and people building Tor from git;
29165 people who build Tor from the source distribution without changing
29166 the Makefile.am files should be fine.
29167 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
29168 so on. This is more robust against some of the failure modes
29169 associated with running the autotools pieces on their own.
29171 o Minor packaging issues:
29172 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
29173 already created. Patch from Andreas Stieger. Fixes bug 2573.
29175 o Code simplifications and refactoring:
29176 - A major revision to our internal node-selecting and listing logic.
29177 Tor already had at least two major ways to look at the question of
29178 "which Tor servers do we know about": a list of router descriptors,
29179 and a list of entries in the current consensus. With
29180 microdescriptors, we're adding a third. Having so many systems
29181 without an abstraction layer over them was hurting the codebase.
29182 Now, we have a new "node_t" abstraction that presents a consistent
29183 interface to a client's view of a Tor node, and holds (nearly) all
29184 of the mutable state formerly in routerinfo_t and routerstatus_t.
29185 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
29186 no longer link against Libevent: they never used it, but
29187 our library structure used to force them to link it.
29189 o Removed features:
29190 - Remove some old code to work around even older versions of Tor that
29191 used forked processes to handle DNS requests. Such versions of Tor
29192 are no longer in use as servers.
29194 o Documentation fixes:
29195 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
29196 - Add missing documentation for the authority-related torrc options
29197 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
29201 Changes in version 0.2.2.25-alpha - 2011-04-29
29202 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
29203 robust, routers no longer overreport their bandwidth, Win7 should crash
29204 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
29205 now prevents hidden service-related activity from being linkable. It
29206 provides more information to Vidalia so you can see if your bridge is
29207 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
29208 StrictNodes configuration options to make them more reliable, more
29209 understandable, and more regularly applied. If you use those options,
29210 please see the revised documentation for them in the manual page.
29213 - Relays were publishing grossly inflated bandwidth values because
29214 they were writing their state files wrong--now they write the
29215 correct value. Also, resume reading bandwidth history from the
29216 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
29217 - Improve hidden service robustness: When we find that we have
29218 extended a hidden service's introduction circuit to a relay not
29219 listed as an introduction point in the HS descriptor we currently
29220 have, retry with an introduction point from the current
29221 descriptor. Previously we would just give up. Fixes bugs 1024 and
29222 1930; bugfix on 0.2.0.10-alpha.
29223 - Clients now stop trying to use an exit node associated with a given
29224 destination by TrackHostExits if they fail to reach that exit node.
29225 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
29226 - Fix crash bug on platforms where gmtime and localtime can return
29227 NULL. Windows 7 users were running into this one. Fixes part of bug
29228 2077. Bugfix on all versions of Tor. Found by boboper.
29230 o Security and stability fixes:
29231 - Don't double-free a parsable, but invalid, microdescriptor, even if
29232 it is followed in the blob we're parsing by an unparsable
29233 microdescriptor. Fixes an issue reported in a comment on bug 2954.
29234 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
29235 - If the Nickname configuration option isn't given, Tor would pick a
29236 nickname based on the local hostname as the nickname for a relay.
29237 Because nicknames are not very important in today's Tor and the
29238 "Unnamed" nickname has been implemented, this is now problematic
29239 behavior: It leaks information about the hostname without being
29240 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
29241 introduced the Unnamed nickname. Reported by tagnaq.
29242 - Fix an uncommon assertion failure when running with DNSPort under
29243 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
29244 - Avoid linkability based on cached hidden service descriptors: forget
29245 all hidden service descriptors cached as a client when processing a
29246 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
29249 - Export GeoIP information on bridge usage to controllers even if we
29250 have not yet been running for 24 hours. Now Vidalia bridge operators
29251 can get more accurate and immediate feedback about their
29252 contributions to the network.
29254 o Major features and bugfixes (node selection):
29255 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
29256 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
29257 options. Previously, we had been ambiguous in describing what
29258 counted as an "exit" node, and what operations exactly "StrictNodes
29259 0" would permit. This created confusion when people saw nodes built
29260 through unexpected circuits, and made it hard to tell real bugs from
29261 surprises. Now the intended behavior is:
29262 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
29263 a node that delivers user traffic outside the Tor network.
29264 . "Entry", in the context of EntryNodes, means a node used as the
29265 first hop of a multihop circuit. It doesn't include direct
29266 connections to directory servers.
29267 . "ExcludeNodes" applies to all nodes.
29268 . "StrictNodes" changes the behavior of ExcludeNodes only. When
29269 StrictNodes is set, Tor should avoid all nodes listed in
29270 ExcludeNodes, even when it will make user requests fail. When
29271 StrictNodes is *not* set, then Tor should follow ExcludeNodes
29272 whenever it can, except when it must use an excluded node to
29273 perform self-tests, connect to a hidden service, provide a
29274 hidden service, fulfill a .exit request, upload directory
29275 information, or fetch directory information.
29276 Collectively, the changes to implement the behavior fix bug 1090.
29277 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
29278 a node is listed in both, it's treated as excluded.
29279 - ExcludeNodes now applies to directory nodes -- as a preference if
29280 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
29281 Don't exclude all the directory authorities and set StrictNodes to 1
29282 unless you really want your Tor to break.
29283 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
29284 - ExcludeExitNodes now overrides .exit requests.
29285 - We don't use bridges listed in ExcludeNodes.
29286 - When StrictNodes is 1:
29287 . We now apply ExcludeNodes to hidden service introduction points
29288 and to rendezvous points selected by hidden service users. This
29289 can make your hidden service less reliable: use it with caution!
29290 . If we have used ExcludeNodes on ourself, do not try relay
29291 reachability self-tests.
29292 . If we have excluded all the directory authorities, we will not
29293 even try to upload our descriptor if we're a relay.
29294 . Do not honor .exit requests to an excluded node.
29295 - Remove a misfeature that caused us to ignore the Fast/Stable flags
29296 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
29297 - When the set of permitted nodes changes, we now remove any mappings
29298 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
29300 - We never cannibalize a circuit that had excluded nodes on it, even
29301 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
29302 - Revert a change where we would be laxer about attaching streams to
29303 circuits than when building the circuits. This was meant to prevent
29304 a set of bugs where streams were never attachable, but our improved
29305 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
29306 - Keep track of how many times we launch a new circuit to handle a
29307 given stream. Too many launches could indicate an inconsistency
29308 between our "launch a circuit to handle this stream" logic and our
29309 "attach this stream to one of the available circuits" logic.
29310 - Improve log messages related to excluded nodes.
29313 - Fix a spurious warning when moving from a short month to a long
29314 month on relays with month-based BandwidthAccounting. Bugfix on
29315 0.2.2.17-alpha; fixes bug 3020.
29316 - When a client finds that an origin circuit has run out of 16-bit
29317 stream IDs, we now mark it as unusable for new streams. Previously,
29318 we would try to close the entire circuit. Bugfix on 0.0.6.
29319 - Add a forgotten cast that caused a compile warning on OS X 10.6.
29320 Bugfix on 0.2.2.24-alpha.
29321 - Be more careful about reporting the correct error from a failed
29322 connect() system call. Under some circumstances, it was possible to
29323 look at an incorrect value for errno when sending the end reason.
29324 Bugfix on 0.1.0.1-rc.
29325 - Correctly handle an "impossible" overflow cases in connection byte
29326 counting, where we write or read more than 4GB on an edge connection
29327 in a single second. Bugfix on 0.1.2.8-beta.
29328 - Correct the warning displayed when a rendezvous descriptor exceeds
29329 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
29331 - Clients and hidden services now use HSDir-flagged relays for hidden
29332 service descriptor downloads and uploads even if the relays have no
29333 DirPort set and the client has disabled TunnelDirConns. This will
29334 eventually allow us to give the HSDir flag to relays with no
29335 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
29336 - Downgrade "no current certificates known for authority" message from
29337 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
29338 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
29339 2917. Bugfix on 0.1.1.1-alpha.
29340 - Only limit the lengths of single HS descriptors, even when multiple
29341 HS descriptors are published to an HSDir relay in a single POST
29342 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
29343 - Write the current time into the LastWritten line in our state file,
29344 rather than the time from the previous write attempt. Also, stop
29345 trying to use a time of -1 in our log statements. Fixes bug 3039;
29346 bugfix on 0.2.2.14-alpha.
29347 - Be more consistent in our treatment of file system paths. "~" should
29348 get expanded to the user's home directory in the Log config option.
29349 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
29350 feature for the -f and --DataDirectory options.
29353 - Make sure every relay writes a state file at least every 12 hours.
29354 Previously, a relay could go for weeks without writing its state
29355 file, and on a crash could lose its bandwidth history, capacity
29356 estimates, client country statistics, and so on. Addresses bug 3012.
29357 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
29358 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
29359 clients are already deprecated because of security bugs.
29360 - Don't allow v0 hidden service authorities to act as clients.
29361 Required by fix for bug 3000.
29362 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
29363 by fix for bug 3000.
29364 - Ensure that no empty [dirreq-](read|write)-history lines are added
29365 to an extrainfo document. Implements ticket 2497.
29367 o Code simplification and refactoring:
29368 - Remove workaround code to handle directory responses from servers
29369 that had bug 539 (they would send HTTP status 503 responses _and_
29370 send a body too). Since only server versions before
29371 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
29372 keep the workaround in place.
29373 - Remove the old 'fuzzy time' logic. It was supposed to be used for
29374 handling calculations where we have a known amount of clock skew and
29375 an allowed amount of unknown skew. But we only used it in three
29376 places, and we never adjusted the known/unknown skew values. This is
29377 still something we might want to do someday, but if we do, we'll
29378 want to do it differently.
29379 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
29380 None of the cases where we did this before were wrong, but by making
29381 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
29382 - Use GetTempDir to find the proper temporary directory location on
29383 Windows when generating temporary files for the unit tests. Patch by
29387 Changes in version 0.2.2.24-alpha - 2011-04-08
29388 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
29389 prevented Tor clients from effectively using "multihomed" bridges,
29390 that is, bridges that listen on multiple ports or IP addresses so users
29391 can continue to use some of their addresses even if others get blocked.
29394 - Fix a bug where bridge users who configure the non-canonical
29395 address of a bridge automatically switch to its canonical
29396 address. If a bridge listens at more than one address, it should be
29397 able to advertise those addresses independently and any non-blocked
29398 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
29400 - If you configured Tor to use bridge A, and then quit and
29401 configured Tor to use bridge B instead, it would happily continue
29402 to use bridge A if it's still reachable. While this behavior is
29403 a feature if your goal is connectivity, in some scenarios it's a
29404 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
29405 - Directory authorities now use data collected from their own
29406 uptime observations when choosing whether to assign the HSDir flag
29407 to relays, instead of trusting the uptime value the relay reports in
29408 its descriptor. This change helps prevent an attack where a small
29409 set of nodes with frequently-changing identity keys can blackhole
29410 a hidden service. (Only authorities need upgrade; others will be
29411 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
29414 - When we restart our relay, we might get a successful connection
29415 from the outside before we've started our reachability tests,
29416 triggering a warning: "ORPort found reachable, but I have no
29417 routerinfo yet. Failing to inform controller of success." This
29418 bug was harmless unless Tor is running under a controller
29419 like Vidalia, in which case the controller would never get a
29420 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
29422 - Make directory authorities more accurate at recording when
29423 relays that have failed several reachability tests became
29424 unreachable, so we can provide more accuracy at assigning Stable,
29425 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
29426 - Fix an issue that prevented static linking of libevent on
29427 some platforms (notably Linux). Fixes bug 2698; bugfix on
29428 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
29429 the --with-static-libevent configure option).
29430 - We now ask the other side of a stream (the client or the exit)
29431 for more data on that stream when the amount of queued data on
29432 that stream dips low enough. Previously, we wouldn't ask the
29433 other side for more data until either it sent us more data (which
29434 it wasn't supposed to do if it had exhausted its window!) or we
29435 had completely flushed all our queued data. This flow control fix
29436 should improve throughput. Fixes bug 2756; bugfix on the earliest
29437 released versions of Tor (svn commit r152).
29438 - Avoid a double-mark-for-free warning when failing to attach a
29439 transparent proxy connection. (We thought we had fixed this in
29440 0.2.2.23-alpha, but it turns out our fix was checking the wrong
29441 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
29442 bug) and 0.2.2.23-alpha (the incorrect fix).
29443 - When warning about missing zlib development packages during compile,
29444 give the correct package names. Bugfix on 0.2.0.1-alpha.
29447 - Directory authorities now log the source of a rejected POSTed v3
29448 networkstatus vote.
29449 - Make compilation with clang possible when using
29450 --enable-gcc-warnings by removing two warning options that clang
29451 hasn't implemented yet and by fixing a few warnings. Implements
29453 - When expiring circuits, use microsecond timers rather than
29454 one-second timers. This can avoid an unpleasant situation where a
29455 circuit is launched near the end of one second and expired right
29456 near the beginning of the next, and prevent fluctuations in circuit
29458 - Use computed circuit-build timeouts to decide when to launch
29459 parallel introduction circuits for hidden services. (Previously,
29460 we would retry after 15 seconds.)
29461 - Update to the April 1 2011 Maxmind GeoLite Country database.
29464 - Create the /var/run/tor directory on startup on OpenSUSE if it is
29465 not already created. Patch from Andreas Stieger. Fixes bug 2573.
29467 o Documentation changes:
29468 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
29469 - Resolve all doxygen warnings except those for missing documentation.
29471 - Add doxygen documentation for more functions, fields, and types.
29474 Changes in version 0.2.2.23-alpha - 2011-03-08
29475 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
29476 they restart they don't lose their bandwidth capacity estimate. This
29477 release also fixes a diverse set of user-facing bugs, ranging from
29478 relays overrunning their rate limiting to clients falsely warning about
29479 clock skew to bridge descriptor leaks by our bridge directory authority.
29482 - Stop sending a CLOCK_SKEW controller status event whenever
29483 we fetch directory information from a relay that has a wrong clock.
29484 Instead, only inform the controller when it's a trusted authority
29485 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29486 the rest of bug 1074.
29487 - Fix an assert in parsing router descriptors containing IPv6
29488 addresses. This one took down the directory authorities when
29489 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
29490 - Make the bridge directory authority refuse to answer directory
29491 requests for "all" descriptors. It used to include bridge
29492 descriptors in its answer, which was a major information leak.
29493 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
29494 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29495 Tor would ignore their RelayBandwidthBurst setting,
29496 potentially using more bandwidth than expected. Bugfix on
29497 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29498 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29499 hidserv" in her torrc. The 'hidserv' argument never controlled
29500 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29503 - Relays now save observed peak bandwidth throughput rates to their
29504 state file (along with total usage, which was already saved)
29505 so that they can determine their correct estimated bandwidth on
29506 restart. Resolves bug 1863, where Tor relays would reset their
29507 estimated bandwidth to 0 after restarting.
29508 - Directory authorities now take changes in router IP address and
29509 ORPort into account when determining router stability. Previously,
29510 if a router changed its IP or ORPort, the authorities would not
29511 treat it as having any downtime for the purposes of stability
29512 calculation, whereas clients would experience downtime since the
29513 change could take a while to propagate to them. Resolves issue 1035.
29514 - Enable Address Space Layout Randomization (ASLR) and Data Execution
29515 Prevention (DEP) by default on Windows to make it harder for
29516 attackers to exploit vulnerabilities. Patch from John Brooks.
29518 o Minor bugfixes (on 0.2.1.x and earlier):
29519 - Fix a rare crash bug that could occur when a client was configured
29520 with a large number of bridges. Fixes bug 2629; bugfix on
29521 0.2.1.2-alpha. Bugfix by trac user "shitlei".
29522 - Avoid a double mark-for-free warning when failing to attach a
29523 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
29525 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
29526 found by "cypherpunks". This bug was introduced before the first
29527 Tor release, in svn commit r110.
29528 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
29529 don't mention them in the manpage. Fixes bug 2450; issue
29530 spotted by keb and G-Lo.
29531 - Fix a bug in bandwidth history state parsing that could have been
29532 triggered if a future version of Tor ever changed the timing
29533 granularity at which bandwidth history is measured. Bugfix on
29534 Tor 0.1.1.11-alpha.
29535 - When a relay decides that its DNS is too broken for it to serve
29536 as an exit server, it advertised itself as a non-exit, but
29537 continued to act as an exit. This could create accidental
29538 partitioning opportunities for users. Instead, if a relay is
29539 going to advertise reject *:* as its exit policy, it should
29540 really act with exit policy "reject *:*". Fixes bug 2366.
29541 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
29542 - In the special case where you configure a public exit relay as your
29543 bridge, Tor would be willing to use that exit relay as the last
29544 hop in your circuit as well. Now we fail that circuit instead.
29545 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
29546 - Fix a bug with our locking implementation on Windows that couldn't
29547 correctly detect when a file was already locked. Fixes bug 2504,
29548 bugfix on 0.2.1.6-alpha.
29549 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
29550 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
29552 - Set target port in get_interface_address6() correctly. Bugfix
29553 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
29554 - Directory authorities are now more robust to hops back in time
29555 when calculating router stability. Previously, if a run of uptime
29556 or downtime appeared to be negative, the calculation could give
29557 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
29559 - Fix an assert that got triggered when using the TestingTorNetwork
29560 configuration option and then issuing a GETINFO config-text control
29561 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
29563 o Minor bugfixes (on 0.2.2.x):
29564 - Clients should not weight BadExit nodes as Exits in their node
29565 selection. Similarly, directory authorities should not count BadExit
29566 bandwidth as Exit bandwidth when computing bandwidth-weights.
29567 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
29568 - Correctly clear our dir_read/dir_write history when there is an
29569 error parsing any bw history value from the state file. Bugfix on
29570 Tor 0.2.2.15-alpha.
29571 - Resolve a bug in verifying signatures of directory objects
29572 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
29573 Fixes bug 2409. Found by "piebeer".
29574 - Bridge authorities no longer crash on SIGHUP when they try to
29575 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
29579 - Log less aggressively about circuit timeout changes, and improve
29580 some other circuit timeout messages. Resolves bug 2004.
29581 - Log a little more clearly about the times at which we're no longer
29582 accepting new connections. Resolves bug 2181.
29583 - Reject attempts at the client side to open connections to private
29584 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
29585 a randomly chosen exit node. Attempts to do so are always
29586 ill-defined, generally prevented by exit policies, and usually
29587 in error. This will also help to detect loops in transparent
29588 proxy configurations. You can disable this feature by setting
29589 "ClientRejectInternalAddresses 0" in your torrc.
29590 - Always treat failure to allocate an RSA key as an unrecoverable
29592 - Update to the March 1 2011 Maxmind GeoLite Country database.
29594 o Minor features (log subsystem):
29595 - Add documentation for configuring logging at different severities in
29596 different log domains. We've had this feature since 0.2.1.1-alpha,
29597 but for some reason it never made it into the manpage. Fixes
29599 - Make it simpler to specify "All log domains except for A and B".
29600 Previously you needed to say "[*,~A,~B]". Now you can just say
29602 - Add a "LogMessageDomains 1" option to include the domains of log
29603 messages along with the messages. Without this, there's no way
29604 to use log domains without reading the source or doing a lot
29607 o Packaging changes:
29608 - Stop shipping the Tor specs files and development proposal documents
29609 in the tarball. They are now in a separate git repository at
29610 git://git.torproject.org/torspec.git
29613 Changes in version 0.2.1.30 - 2011-02-23
29614 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
29615 change is a slight tweak to Tor's TLS handshake that makes relays
29616 and bridges that run this new version reachable from Iran again.
29617 We don't expect this tweak will win the arms race long-term, but it
29618 buys us time until we roll out a better solution.
29621 - Stop sending a CLOCK_SKEW controller status event whenever
29622 we fetch directory information from a relay that has a wrong clock.
29623 Instead, only inform the controller when it's a trusted authority
29624 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29625 the rest of bug 1074.
29626 - Fix a bounds-checking error that could allow an attacker to
29627 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29628 Found by "piebeer".
29629 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29630 Tor would ignore their RelayBandwidthBurst setting,
29631 potentially using more bandwidth than expected. Bugfix on
29632 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29633 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29634 hidserv" in her torrc. The 'hidserv' argument never controlled
29635 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29638 - Adjust our TLS Diffie-Hellman parameters to match those used by
29640 - Update to the February 1 2011 Maxmind GeoLite Country database.
29643 - Check for and reject overly long directory certificates and
29644 directory tokens before they have a chance to hit any assertions.
29645 Bugfix on 0.2.1.28. Found by "doorss".
29646 - Bring the logic that gathers routerinfos and assesses the
29647 acceptability of circuits into line. This prevents a Tor OP from
29648 getting locked in a cycle of choosing its local OR as an exit for a
29649 path (due to a .exit request) and then rejecting the circuit because
29650 its OR is not listed yet. It also prevents Tor clients from using an
29651 OR running in the same instance as an exit (due to a .exit request)
29652 if the OR does not meet the same requirements expected of an OR
29653 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29655 o Packaging changes:
29656 - Stop shipping the Tor specs files and development proposal documents
29657 in the tarball. They are now in a separate git repository at
29658 git://git.torproject.org/torspec.git
29659 - Do not include Git version tags as though they are SVN tags when
29660 generating a tarball from inside a repository that has switched
29661 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
29664 Changes in version 0.2.2.22-alpha - 2011-01-25
29665 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
29666 main other change is a slight tweak to Tor's TLS handshake that makes
29667 relays and bridges that run this new version reachable from Iran again.
29668 We don't expect this tweak will win the arms race long-term, but it
29669 will buy us a bit more time until we roll out a better solution.
29672 - Fix a bounds-checking error that could allow an attacker to
29673 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29674 Found by "piebeer".
29675 - Don't assert when changing from bridge to relay or vice versa
29676 via the controller. The assert happened because we didn't properly
29677 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
29678 bug 2433. Reported by bastik.
29681 - Adjust our TLS Diffie-Hellman parameters to match those used by
29683 - Provide a log message stating which geoip file we're parsing
29684 instead of just stating that we're parsing the geoip file.
29685 Implements ticket 2432.
29688 - Check for and reject overly long directory certificates and
29689 directory tokens before they have a chance to hit any assertions.
29690 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
29693 Changes in version 0.2.2.21-alpha - 2011-01-15
29694 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
29695 continues our recent code security audit work. The main fix resolves
29696 a remote heap overflow vulnerability that can allow remote code
29697 execution (CVE-2011-0427). Other fixes address a variety of assert
29698 and crash bugs, most of which we think are hard to exploit remotely.
29700 o Major bugfixes (security), also included in 0.2.1.29:
29701 - Fix a heap overflow bug where an adversary could cause heap
29702 corruption. This bug probably allows remote code execution
29703 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29705 - Prevent a denial-of-service attack by disallowing any
29706 zlib-compressed data whose compression factor is implausibly
29707 high. Fixes part of bug 2324; reported by "doorss".
29708 - Zero out a few more keys in memory before freeing them. Fixes
29709 bug 2384 and part of bug 2385. These key instances found by
29710 "cypherpunks", based on Andrew Case's report about being able
29711 to find sensitive data in Tor's memory space if you have enough
29712 permissions. Bugfix on 0.0.2pre9.
29714 o Major bugfixes (crashes), also included in 0.2.1.29:
29715 - Prevent calls to Libevent from inside Libevent log handlers.
29716 This had potential to cause a nasty set of crashes, especially
29717 if running Libevent with debug logging enabled, and running
29718 Tor with a controller watching for low-severity log messages.
29719 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29720 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29721 underflow errors there too. Fixes the other part of bug 2324.
29722 - Fix a bug where we would assert if we ever had a
29723 cached-descriptors.new file (or another file read directly into
29724 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29725 on 0.2.1.25. Found by doorss.
29726 - Fix some potential asserts and parsing issues with grossly
29727 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29730 o Minor bugfixes (other), also included in 0.2.1.29:
29731 - Fix a bug with handling misformed replies to reverse DNS lookup
29732 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29733 bug reported by doorss.
29734 - Fix compilation on mingw when a pthreads compatibility library
29735 has been installed. (We don't want to use it, so we shouldn't
29736 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29737 - Fix a bug where we would declare that we had run out of virtual
29738 addresses when the address space was only half-exhausted. Bugfix
29740 - Correctly handle the case where AutomapHostsOnResolve is set but
29741 no virtual addresses are available. Fixes bug 2328; bugfix on
29742 0.1.2.1-alpha. Bug found by doorss.
29743 - Correctly handle wrapping around when we run out of virtual
29744 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
29746 o Minor features, also included in 0.2.1.29:
29747 - Update to the January 1 2011 Maxmind GeoLite Country database.
29748 - Introduce output size checks on all of our decryption functions.
29750 o Build changes, also included in 0.2.1.29:
29751 - Tor does not build packages correctly with Automake 1.6 and earlier;
29752 added a check to Makefile.am to make sure that we're building with
29753 Automake 1.7 or later.
29754 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29755 because we built it with a too-old version of automake. Thus that
29756 release broke ./configure --enable-openbsd-malloc, which is popular
29757 among really fast exit relays on Linux.
29759 o Major bugfixes, new in 0.2.2.21-alpha:
29760 - Prevent crash/heap corruption when the cbtnummodes consensus
29761 parameter is set to 0 or large values. Fixes bug 2317; bugfix
29764 o Major features, new in 0.2.2.21-alpha:
29765 - Introduce minimum/maximum values that clients will believe
29766 from the consensus. Now we'll have a better chance to avoid crashes
29767 or worse when a consensus param has a weird value.
29769 o Minor features, new in 0.2.2.21-alpha:
29770 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
29771 used on bridges, and it makes bridge scanning somewhat easier.
29772 - If writing the state file to disk fails, wait up to an hour before
29773 retrying again, rather than trying again each second. Fixes bug
29774 2346; bugfix on Tor 0.1.1.3-alpha.
29775 - Make Libevent log messages get delivered to controllers later,
29776 and not from inside the Libevent log handler. This prevents unsafe
29777 reentrant Libevent calls while still letting the log messages
29779 - Detect platforms that brokenly use a signed size_t, and refuse to
29780 build there. Found and analyzed by doorss and rransom.
29781 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
29784 o Minor bugfixes, new in 0.2.2.21-alpha:
29785 - Handle SOCKS messages longer than 128 bytes long correctly, rather
29786 than waiting forever for them to finish. Fixes bug 2330; bugfix
29787 on 0.2.0.16-alpha. Found by doorss.
29788 - Add assertions to check for overflow in arguments to
29789 base32_encode() and base32_decode(); fix a signed-unsigned
29790 comparison there too. These bugs are not actually reachable in Tor,
29791 but it's good to prevent future errors too. Found by doorss.
29792 - Correctly detect failures to create DNS requests when using Libevent
29793 versions before v2. (Before Libevent 2, we used our own evdns
29794 implementation. Its return values for Libevent's evdns_resolve_*()
29795 functions are not consistent with those from Libevent.) Fixes bug
29796 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
29798 o Documentation, new in 0.2.2.21-alpha:
29799 - Document the default socks host and port (127.0.0.1:9050) for
29803 Changes in version 0.2.1.29 - 2011-01-15
29804 Tor 0.2.1.29 continues our recent code security audit work. The main
29805 fix resolves a remote heap overflow vulnerability that can allow remote
29806 code execution. Other fixes address a variety of assert and crash bugs,
29807 most of which we think are hard to exploit remotely.
29809 o Major bugfixes (security):
29810 - Fix a heap overflow bug where an adversary could cause heap
29811 corruption. This bug probably allows remote code execution
29812 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29814 - Prevent a denial-of-service attack by disallowing any
29815 zlib-compressed data whose compression factor is implausibly
29816 high. Fixes part of bug 2324; reported by "doorss".
29817 - Zero out a few more keys in memory before freeing them. Fixes
29818 bug 2384 and part of bug 2385. These key instances found by
29819 "cypherpunks", based on Andrew Case's report about being able
29820 to find sensitive data in Tor's memory space if you have enough
29821 permissions. Bugfix on 0.0.2pre9.
29823 o Major bugfixes (crashes):
29824 - Prevent calls to Libevent from inside Libevent log handlers.
29825 This had potential to cause a nasty set of crashes, especially
29826 if running Libevent with debug logging enabled, and running
29827 Tor with a controller watching for low-severity log messages.
29828 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29829 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29830 underflow errors there too. Fixes the other part of bug 2324.
29831 - Fix a bug where we would assert if we ever had a
29832 cached-descriptors.new file (or another file read directly into
29833 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29834 on 0.2.1.25. Found by doorss.
29835 - Fix some potential asserts and parsing issues with grossly
29836 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29839 o Minor bugfixes (other):
29840 - Fix a bug with handling misformed replies to reverse DNS lookup
29841 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29842 bug reported by doorss.
29843 - Fix compilation on mingw when a pthreads compatibility library
29844 has been installed. (We don't want to use it, so we shouldn't
29845 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29846 - Fix a bug where we would declare that we had run out of virtual
29847 addresses when the address space was only half-exhausted. Bugfix
29849 - Correctly handle the case where AutomapHostsOnResolve is set but
29850 no virtual addresses are available. Fixes bug 2328; bugfix on
29851 0.1.2.1-alpha. Bug found by doorss.
29852 - Correctly handle wrapping around to when we run out of virtual
29853 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
29854 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29855 because we built it with a too-old version of automake. Thus that
29856 release broke ./configure --enable-openbsd-malloc, which is popular
29857 among really fast exit relays on Linux.
29860 - Update to the January 1 2011 Maxmind GeoLite Country database.
29861 - Introduce output size checks on all of our decryption functions.
29864 - Tor does not build packages correctly with Automake 1.6 and earlier;
29865 added a check to Makefile.am to make sure that we're building with
29866 Automake 1.7 or later.
29869 Changes in version 0.2.2.20-alpha - 2010-12-17
29870 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
29871 exploitable bugs. We also fix a variety of other significant bugs,
29872 change the IP address for one of our directory authorities, and update
29873 the minimum version that Tor relays must run to join the network.
29876 - Fix a remotely exploitable bug that could be used to crash instances
29877 of Tor remotely by overflowing on the heap. Remote-code execution
29878 hasn't been confirmed, but can't be ruled out. Everyone should
29879 upgrade. Bugfix on the 0.1.1 series and later.
29880 - Fix a bug that could break accounting on 64-bit systems with large
29881 time_t values, making them hibernate for impossibly long intervals.
29882 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
29883 - Fix a logic error in directory_fetches_from_authorities() that
29884 would cause all _non_-exits refusing single-hop-like circuits
29885 to fetch from authorities, when we wanted to have _exits_ fetch
29886 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
29888 - Fix a stream fairness bug that would cause newer streams on a given
29889 circuit to get preference when reading bytes from the origin or
29890 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
29891 introduced before the first Tor release, in svn revision r152.
29893 o Directory authority changes:
29894 - Change IP address and ports for gabelmoo (v3 directory authority).
29897 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
29898 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
29899 - Fix an off-by-one error in calculating some controller command
29900 argument lengths. Fortunately, this mistake is harmless since
29901 the controller code does redundant NUL termination too. Found by
29902 boboper. Bugfix on 0.1.1.1-alpha.
29903 - Do not dereference NULL if a bridge fails to build its
29904 extra-info descriptor. Found by an anonymous commenter on
29905 Trac. Bugfix on 0.2.2.19-alpha.
29908 - Update to the December 1 2010 Maxmind GeoLite Country database.
29909 - Directory authorities now reject relays running any versions of
29910 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
29911 known bugs that keep RELAY_EARLY cells from working on rendezvous
29912 circuits. Followup to fix for bug 2081.
29913 - Directory authorities now reject relays running any version of Tor
29914 older than 0.2.0.26-rc. That version is the earliest that fetches
29915 current directory information correctly. Fixes bug 2156.
29916 - Report only the top 10 ports in exit-port stats in order not to
29917 exceed the maximum extra-info descriptor length of 50 KB. Implements
29921 Changes in version 0.2.1.28 - 2010-12-17
29922 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
29923 exploitable bugs. We also took this opportunity to change the IP address
29924 for one of our directory authorities, and to update the geoip database
29928 - Fix a remotely exploitable bug that could be used to crash instances
29929 of Tor remotely by overflowing on the heap. Remote-code execution
29930 hasn't been confirmed, but can't be ruled out. Everyone should
29931 upgrade. Bugfix on the 0.1.1 series and later.
29933 o Directory authority changes:
29934 - Change IP address and ports for gabelmoo (v3 directory authority).
29937 - Update to the December 1 2010 Maxmind GeoLite Country database.
29940 Changes in version 0.2.1.27 - 2010-11-23
29941 Yet another OpenSSL security patch broke its compatibility with Tor:
29942 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
29943 also took this opportunity to fix several crash bugs, integrate a new
29944 directory authority, and update the bundled GeoIP database.
29947 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29948 No longer set the tlsext_host_name extension on server SSL objects;
29949 but continue to set it on client SSL objects. Our goal in setting
29950 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29951 bugfix on 0.2.1.1-alpha.
29952 - Do not log messages to the controller while shrinking buffer
29953 freelists. Doing so would sometimes make the controller connection
29954 try to allocate a buffer chunk, which would mess up the internals
29955 of the freelist and cause an assertion failure. Fixes bug 1125;
29956 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29957 - Learn our external IP address when we're a relay or bridge, even if
29958 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29959 where we introduced bridge relays that don't need to publish to
29960 be useful. Fixes bug 2050.
29961 - Do even more to reject (and not just ignore) annotations on
29962 router descriptors received anywhere but from the cache. Previously
29963 we would ignore such annotations at first, but cache them to disk
29964 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29965 - When you're using bridges and your network goes away and your
29966 bridges get marked as down, recover when you attempt a new socks
29967 connection (if the network is back), rather than waiting up to an
29968 hour to try fetching new descriptors for your bridges. Bugfix on
29969 0.2.0.3-alpha; fixes bug 1981.
29972 - Move to the November 2010 Maxmind GeoLite country db (rather
29973 than the June 2009 ip-to-country GeoIP db) for our statistics that
29974 count how many users relays are seeing from each country. Now we'll
29975 have more accurate data, especially for many African countries.
29977 o New directory authorities:
29978 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29982 - Fix an assertion failure that could occur in directory caches or
29983 bridge users when using a very short voting interval on a testing
29984 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
29986 - Enforce multiplicity rules when parsing annotations. Bugfix on
29987 0.2.0.8-alpha. Found by piebeer.
29988 - Allow handshaking OR connections to take a full KeepalivePeriod
29989 seconds to handshake. Previously, we would close them after
29990 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29991 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29993 - When building with --enable-gcc-warnings on OpenBSD, disable
29994 warnings in system headers. This makes --enable-gcc-warnings
29995 pass on OpenBSD 4.8.
29998 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29999 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
30000 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
30001 Servers can start sending this code when enough clients recognize
30002 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
30003 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
30004 Patch from mingw-san.
30007 - Remove the old debian/ directory from the main Tor distribution.
30008 The official Tor-for-debian git repository lives at the URL
30009 https://git.torproject.org/debian/tor.git
30010 - Stop shipping the old doc/website/ directory in the tarball. We
30011 changed the website format in late 2010, and what we shipped in
30012 0.2.1.26 really wasn't that useful anyway.
30015 Changes in version 0.2.2.19-alpha - 2010-11-22
30016 Yet another OpenSSL security patch broke its compatibility with Tor:
30017 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
30020 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
30021 No longer set the tlsext_host_name extension on server SSL objects;
30022 but continue to set it on client SSL objects. Our goal in setting
30023 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
30024 bugfix on 0.2.1.1-alpha.
30027 - Try harder not to exceed the maximum length of 50 KB when writing
30028 statistics to extra-info descriptors. This bug was triggered by very
30029 fast relays reporting exit-port, entry, and dirreq statistics.
30030 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
30031 - Publish a router descriptor even if generating an extra-info
30032 descriptor fails. Previously we would not publish a router
30033 descriptor without an extra-info descriptor; this can cause fast
30034 exit relays collecting exit-port statistics to drop from the
30035 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
30038 Changes in version 0.2.2.18-alpha - 2010-11-16
30039 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
30040 us lately, makes unpublished bridge relays able to detect their IP
30041 address, and fixes a wide variety of other bugs to get us much closer
30042 to a stable release.
30045 - Do even more to reject (and not just ignore) annotations on
30046 router descriptors received anywhere but from the cache. Previously
30047 we would ignore such annotations at first, but cache them to disk
30048 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
30049 - Do not log messages to the controller while shrinking buffer
30050 freelists. Doing so would sometimes make the controller connection
30051 try to allocate a buffer chunk, which would mess up the internals
30052 of the freelist and cause an assertion failure. Fixes bug 1125;
30053 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
30054 - Learn our external IP address when we're a relay or bridge, even if
30055 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
30056 where we introduced bridge relays that don't need to publish to
30057 be useful. Fixes bug 2050.
30058 - Maintain separate TLS contexts and certificates for incoming and
30059 outgoing connections in bridge relays. Previously we would use the
30060 same TLS contexts and certs for incoming and outgoing connections.
30061 Bugfix on 0.2.0.3-alpha; addresses bug 988.
30062 - Maintain separate identity keys for incoming and outgoing TLS
30063 contexts in bridge relays. Previously we would use the same
30064 identity keys for incoming and outgoing TLS contexts. Bugfix on
30065 0.2.0.3-alpha; addresses the other half of bug 988.
30066 - Avoid an assertion failure when we as an authority receive a
30067 duplicate upload of a router descriptor that we already have,
30068 but which we previously considered an obsolete descriptor.
30069 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
30070 - Avoid a crash bug triggered by looking at a dangling pointer while
30071 setting the network status consensus. Found by Robert Ransom.
30072 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
30073 - Fix a logic error where servers that _didn't_ act as exits would
30074 try to keep their server lists more aggressively up to date than
30075 exits, when it was supposed to be the other way around. Bugfix
30078 o Minor bugfixes (on Tor 0.2.1.x and earlier):
30079 - When we're trying to guess whether we know our IP address as
30080 a relay, we would log various ways that we failed to guess
30081 our address, but never log that we ended up guessing it
30082 successfully. Now add a log line to help confused and anxious
30083 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
30084 - Bring the logic that gathers routerinfos and assesses the
30085 acceptability of circuits into line. This prevents a Tor OP from
30086 getting locked in a cycle of choosing its local OR as an exit for a
30087 path (due to a .exit request) and then rejecting the circuit because
30088 its OR is not listed yet. It also prevents Tor clients from using an
30089 OR running in the same instance as an exit (due to a .exit request)
30090 if the OR does not meet the same requirements expected of an OR
30091 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
30092 - Correctly describe errors that occur when generating a TLS object.
30093 Previously we would attribute them to a failure while generating a
30094 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
30096 - Enforce multiplicity rules when parsing annotations. Bugfix on
30097 0.2.0.8-alpha. Found by piebeer.
30098 - Fix warnings that newer versions of autoconf produced during
30099 ./autogen.sh. These warnings appear to be harmless in our case,
30100 but they were extremely verbose. Fixes bug 2020.
30102 o Minor bugfixes (on Tor 0.2.2.x):
30103 - Enable protection of small arrays whenever we build with gcc
30104 hardening features, not only when also building with warnings
30105 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
30108 - Make hidden services work better in private Tor networks by not
30109 requiring any uptime to join the hidden service descriptor
30110 DHT. Implements ticket 2088.
30111 - Rate-limit the "your application is giving Tor only an IP address"
30112 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
30113 - When AllowSingleHopExits is set, print a warning to explain to the
30114 relay operator why most clients are avoiding her relay.
30115 - Update to the November 1 2010 Maxmind GeoLite Country database.
30117 o Code simplifications and refactoring:
30118 - When we fixed bug 1038 we had to put in a restriction not to send
30119 RELAY_EARLY cells on rend circuits. This was necessary as long
30120 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
30121 active. Now remove this obsolete check. Resolves bug 2081.
30122 - Some options used different conventions for uppercasing of acronyms
30123 when comparing manpage and source. Fix those in favor of the
30124 manpage, as it makes sense to capitalize acronyms.
30125 - Remove the torrc.complete file. It hasn't been kept up to date
30126 and users will have better luck checking out the manpage.
30127 - Remove the obsolete "NoPublish" option; it has been flagged
30128 as obsolete and has produced a warning since 0.1.1.18-rc.
30129 - Remove everything related to building the expert bundle for OS X.
30130 It has confused many users, doesn't work right on OS X 10.6,
30131 and is hard to get rid of once installed. Resolves bug 1274.
30134 Changes in version 0.2.2.17-alpha - 2010-09-30
30135 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
30136 to use one-hop circuits (which can put the exit relays at higher risk,
30137 plus unbalance the network); fixes a big bug in bandwidth accounting
30138 for relays that want to limit their monthly bandwidth use; fixes a
30139 big pile of bugs in how clients tolerate temporary network failure;
30140 and makes our adaptive circuit build timeout feature (which improves
30141 client performance if your network is fast while not breaking things
30142 if your network is slow) better handle bad networks.
30145 - Exit relays now try harder to block exit attempts from unknown
30146 relays, to make it harder for people to use them as one-hop proxies
30147 a la tortunnel. Controlled by the refuseunknownexits consensus
30148 parameter (currently enabled), or you can override it on your
30149 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
30151 o Major bugfixes (0.2.1.x and earlier):
30152 - Fix a bug in bandwidth accounting that could make us use twice
30153 the intended bandwidth when our interval start changes due to
30154 daylight saving time. Now we tolerate skew in stored vs computed
30155 interval starts: if the start of the period changes by no more than
30156 50% of the period's duration, we remember bytes that we transferred
30157 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
30158 - Always search the Windows system directory for system DLLs, and
30159 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
30160 - When you're using bridges and your network goes away and your
30161 bridges get marked as down, recover when you attempt a new socks
30162 connection (if the network is back), rather than waiting up to an
30163 hour to try fetching new descriptors for your bridges. Bugfix on
30164 0.2.0.3-alpha; fixes bug 1981.
30166 o Major bugfixes (on 0.2.2.x):
30167 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
30169 - Fix a segfault that could happen when operating a bridge relay with
30170 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
30171 - The consensus bandwidth-weights (used by clients to choose fast
30172 relays) entered an unexpected edge case in September where
30173 Exits were much scarcer than Guards, resulting in bad weight
30174 recommendations. Now we compute them using new constraints that
30175 should succeed in all cases. Also alter directory authorities to
30176 not include the bandwidth-weights line if they fail to produce
30177 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
30178 - When weighting bridges during path selection, we used to trust
30179 the bandwidths they provided in their descriptor, only capping them
30180 at 10MB/s. This turned out to be problematic for two reasons:
30181 Bridges could claim to handle a lot more traffic then they
30182 actually would, thus making more clients pick them and have a
30183 pretty effective DoS attack. The other issue is that new bridges
30184 that might not have a good estimate for their bw capacity yet
30185 would not get used at all unless no other bridges are available
30186 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
30188 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
30189 - Ignore cannibalized circuits when recording circuit build times.
30190 This should provide for a minor performance improvement for hidden
30191 service users using 0.2.2.14-alpha, and should remove two spurious
30192 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
30193 - Simplify the logic that causes us to decide if the network is
30194 unavailable for purposes of recording circuit build times. If we
30195 receive no cells whatsoever for the entire duration of a circuit's
30196 full measured lifetime, the network is probably down. Also ignore
30197 one-hop directory fetching circuit timeouts when calculating our
30198 circuit build times. These changes should hopefully reduce the
30199 cases where we see ridiculous circuit build timeouts for people
30200 with spotty wireless connections. Fixes part of bug 1772; bugfix
30202 - Prevent the circuit build timeout from becoming larger than
30203 the maximum build time we have ever seen. Also, prevent the time
30204 period for measurement circuits from becoming larger than twice that
30205 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
30208 - When we run out of directory information such that we can't build
30209 circuits, but then get enough that we can build circuits, log when
30210 we actually construct a circuit, so the user has a better chance of
30211 knowing what's going on. Fixes bug 1362.
30212 - Be more generous with how much bandwidth we'd use up (with
30213 accounting enabled) before entering "soft hibernation". Previously,
30214 we'd refuse new connections and circuits once we'd used up 95% of
30215 our allotment. Now, we use up 95% of our allotment, AND make sure
30216 that we have no more than 500MB (or 3 hours of expected traffic,
30217 whichever is lower) remaining before we enter soft hibernation.
30218 - If we've configured EntryNodes and our network goes away and/or all
30219 our entrynodes get marked down, optimistically retry them all when
30220 a new socks application request appears. Fixes bug 1882.
30221 - Add some more defensive programming for architectures that can't
30222 handle unaligned integer accesses. We don't know of any actual bugs
30223 right now, but that's the best time to fix them. Fixes bug 1943.
30224 - Support line continuations in the torrc config file. If a line
30225 ends with a single backslash character, the newline is ignored, and
30226 the configuration value is treated as continuing on the next line.
30229 o Minor bugfixes (on 0.2.1.x and earlier):
30230 - For bandwidth accounting, calculate our expected bandwidth rate
30231 based on the time during which we were active and not in
30232 soft-hibernation during the last interval. Previously, we were
30233 also considering the time spent in soft-hibernation. If this
30234 was a long time, we would wind up underestimating our bandwidth
30235 by a lot, and skewing our wakeup time towards the start of the
30236 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
30238 o Minor bugfixes (on 0.2.2.x):
30239 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
30240 which were disabled by the circuit build timeout changes in
30241 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
30242 - Make sure we don't warn about missing bandwidth weights when
30243 choosing bridges or other relays not in the consensus. Bugfix on
30244 0.2.2.10-alpha; fixes bug 1805.
30245 - In our logs, do not double-report signatures from unrecognized
30246 authorities both as "from unknown authority" and "not
30247 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
30250 Changes in version 0.2.2.16-alpha - 2010-09-17
30251 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
30252 evident at exit relays), and also continues to resolve all the little
30253 bugs that have been filling up trac lately.
30255 o Major bugfixes (stream-level fairness):
30256 - When receiving a circuit-level SENDME for a blocked circuit, try
30257 to package cells fairly from all the streams that had previously
30258 been blocked on that circuit. Previously, we had started with the
30259 oldest stream, and allowed each stream to potentially exhaust
30260 the circuit's package window. This gave older streams on any
30261 given circuit priority over newer ones. Fixes bug 1937. Detected
30262 originally by Camilo Viecco. This bug was introduced before the
30263 first Tor release, in svn commit r152: it is the new winner of
30264 the longest-lived bug prize.
30265 - When the exit relay got a circuit-level sendme cell, it started
30266 reading on the exit streams, even if had 500 cells queued in the
30267 circuit queue already, so the circuit queue just grew and grew in
30268 some cases. We fix this by not re-enabling reading on receipt of a
30269 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
30270 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
30272 - Newly created streams were allowed to read cells onto circuits,
30273 even if the circuit's cell queue was blocked and waiting to drain.
30274 This created potential unfairness, as older streams would be
30275 blocked, but newer streams would gladly fill the queue completely.
30276 We add code to detect this situation and prevent any stream from
30277 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
30281 - Update to the September 1 2010 Maxmind GeoLite Country database.
30282 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
30283 not. This would lead to a cookie that is still not group readable.
30284 Closes bug 1843. Suggested by katmagic.
30285 - When logging a rate-limited warning, we now mention how many messages
30286 got suppressed since the last warning.
30287 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
30288 do individual connection-level rate limiting of clients. The torrc
30289 config options with the same names trump the consensus params, if
30290 both are present. Replaces the old "bwconnrate" and "bwconnburst"
30291 consensus params which were broken from 0.2.2.7-alpha through
30292 0.2.2.14-alpha. Closes bug 1947.
30293 - When a router changes IP address or port, authorities now launch
30294 a new reachability test for it. Implements ticket 1899.
30295 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
30296 2 no signature, 4 required" messages about consensus signatures
30297 easier to read, and make sure they get logged at the same severity
30298 as the messages explaining which keys are which. Fixes bug 1290.
30299 - Don't warn when we have a consensus that we can't verify because
30300 of missing certificates, unless those certificates are ones
30301 that we have been trying and failing to download. Fixes bug 1145.
30302 - If you configure your bridge with a known identity fingerprint,
30303 and the bridge authority is unreachable (as it is in at least
30304 one country now), fall back to directly requesting the descriptor
30305 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
30307 - When building with --enable-gcc-warnings on OpenBSD, disable
30308 warnings in system headers. This makes --enable-gcc-warnings
30309 pass on OpenBSD 4.8.
30311 o Minor bugfixes (on 0.2.1.x and earlier):
30312 - Authorities will now attempt to download consensuses if their
30313 own efforts to make a live consensus have failed. This change
30314 means authorities that restart will fetch a valid consensus, and
30315 it means authorities that didn't agree with the current consensus
30316 will still fetch and serve it if it has enough signatures. Bugfix
30317 on 0.2.0.9-alpha; fixes bug 1300.
30318 - Ensure DNS requests launched by "RESOLVE" commands from the
30319 controller respect the __LeaveStreamsUnattached setconf options. The
30320 same goes for requests launched via DNSPort or transparent
30321 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
30322 - Allow handshaking OR connections to take a full KeepalivePeriod
30323 seconds to handshake. Previously, we would close them after
30324 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
30325 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
30327 - Rate-limit "Failed to hand off onionskin" warnings.
30328 - Never relay a cell for a circuit we have already destroyed.
30329 Between marking a circuit as closeable and finally closing it,
30330 it may have been possible for a few queued cells to get relayed,
30331 even though they would have been immediately dropped by the next
30332 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
30333 - Never queue a cell for a circuit that's already been marked
30335 - Never vote for a server as "Running" if we have a descriptor for
30336 it claiming to be hibernating, and that descriptor was published
30337 more recently than our last contact with the server. Bugfix on
30338 0.2.0.3-alpha; fixes bug 911.
30339 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
30342 o Minor bugfixes (on 0.2.2.x):
30343 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
30344 down if a directory fetch fails and you've configured either
30345 bridges or EntryNodes. The intent was to mark the relay as down
30346 _unless_ you're using bridges or EntryNodes, since if you are
30347 then you could quickly run out of entry points.
30348 - Fix the Windows directory-listing code. A bug introduced in
30349 0.2.2.14-alpha could make Windows directory servers forget to load
30350 some of their cached v2 networkstatus files.
30351 - Really allow clients to use relays as bridges. Fixes bug 1776;
30352 bugfix on 0.2.2.15-alpha.
30353 - Demote a warn to info that happens when the CellStatistics option
30354 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
30355 Reported by Moritz Bartl.
30356 - On Windows, build correctly either with or without Unicode support.
30357 This is necessary so that Tor can support fringe platforms like
30358 Windows 98 (which has no Unicode), or Windows CE (which has no
30359 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
30362 - Add a unit test for cross-platform directory-listing code.
30365 Changes in version 0.2.2.15-alpha - 2010-08-18
30366 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
30367 fixes a variety of other bugs that were preventing performance
30368 experiments from moving forward, fixes several bothersome memory leaks,
30369 and generally closes a lot of smaller bugs that have been filling up
30373 - Stop assigning the HSDir flag to relays that disable their
30374 DirPort (and thus will refuse to answer directory requests). This
30375 fix should dramatically improve the reachability of hidden services:
30376 hidden services and hidden service clients pick six HSDir relays
30377 to store and retrieve the hidden service descriptor, and currently
30378 about half of the HSDir relays will refuse to work. Bugfix on
30379 0.2.0.10-alpha; fixes part of bug 1693.
30380 - The PerConnBWRate and Burst config options, along with the
30381 bwconnrate and bwconnburst consensus params, initialized each conn's
30382 token bucket values only when the connection is established. Now we
30383 update them if the config options change, and update them every time
30384 we get a new consensus. Otherwise we can encounter an ugly edge
30385 case where we initialize an OR conn to client-level bandwidth,
30386 but then later the relay joins the consensus and we leave it
30387 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
30388 - Fix a regression that caused Tor to rebind its ports if it receives
30389 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
30392 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
30393 should give us approximately 40-50% more Guard-flagged nodes,
30394 improving the anonymity the Tor network can provide and also
30395 decreasing the dropoff in throughput that relays experience when
30396 they first get the Guard flag.
30397 - Allow enabling or disabling the *Statistics config options while
30401 - Update to the August 1 2010 Maxmind GeoLite Country database.
30402 - Have the controller interface give a more useful message than
30403 "Internal Error" in response to failed GETINFO requests.
30404 - Warn when the same option is provided more than once in a torrc
30405 file, on the command line, or in a single SETCONF statement, and
30406 the option is one that only accepts a single line. Closes bug 1384.
30407 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
30408 Patch from mingw-san.
30409 - Add support for the country code "{??}" in torrc options like
30410 ExcludeNodes, to indicate all routers of unknown country. Closes
30412 - Relays report the number of bytes spent on answering directory
30413 requests in extra-info descriptors similar to {read,write}-history.
30414 Implements enhancement 1790.
30416 o Minor bugfixes (on 0.2.1.x and earlier):
30417 - Complain if PublishServerDescriptor is given multiple arguments that
30418 include 0 or 1. This configuration will be rejected in the future.
30419 Bugfix on 0.2.0.1-alpha; closes bug 1107.
30420 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
30421 Bugfix on 0.2.0.13-alpha; closes bug 928.
30422 - Change "Application request when we're believed to be offline."
30423 notice to "Application request when we haven't used client
30424 functionality lately.", to clarify that it's not an error. Bugfix
30425 on 0.0.9.3; fixes bug 1222.
30426 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
30427 would return "551 Internal error" rather than "552 Unrecognized key
30428 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
30429 - Users can't configure a regular relay to be their bridge. It didn't
30430 work because when Tor fetched the bridge descriptor, it found
30431 that it already had it, and didn't realize that the purpose of the
30432 descriptor had changed. Now we replace routers with a purpose other
30433 than bridge with bridge descriptors when fetching them. Bugfix on
30434 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
30435 refetch the descriptor with router purpose 'general', disabling
30437 - Fix a rare bug in rend_fn unit tests: we would fail a test when
30438 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
30439 on 0.2.0.10-alpha; fixes bug 1808.
30440 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
30441 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
30442 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
30443 Servers can start sending this code when enough clients recognize
30444 it. Also update the spec to reflect this new reason. Bugfix on
30445 0.1.0.1-rc; fixes part of bug 1793.
30446 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
30447 when we switch from being a public relay to a bridge. Otherwise
30448 there will still be clients that see the relay in their consensus,
30449 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
30451 - Instead of giving an assertion failure on an internal mismatch
30452 on estimated freelist size, just log a BUG warning and try later.
30453 Mitigates but does not fix bug 1125.
30454 - Fix an assertion failure that could occur in caches or bridge users
30455 when using a very short voting interval on a testing network.
30456 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
30458 o Minor bugfixes (on 0.2.2.x):
30459 - Alter directory authorities to always consider Exit-flagged nodes
30460 as potential Guard nodes in their votes. The actual decision to
30461 use Exits as Guards is done in the consensus bandwidth weights.
30462 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
30463 - When the controller is reporting the purpose of circuits that
30464 didn't finish building before the circuit build timeout, it was
30465 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
30466 - Our libevent version parsing code couldn't handle versions like
30467 1.4.14b-stable and incorrectly warned the user about using an
30468 old and broken version of libevent. Treat 1.4.14b-stable like
30469 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
30471 - Don't use substitution references like $(VAR:MOD) when
30472 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
30473 '$(:x)' to 'x' rather than the empty string. This bites us in
30474 doc/ when configured with --disable-asciidoc. Bugfix on
30475 0.2.2.9-alpha; fixes bug 1773.
30476 - Remove a spurious hidden service server-side log notice about
30477 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
30479 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
30481 - Correctly report written bytes on linked connections. Found while
30482 implementing 1790. Bugfix on 0.2.2.4-alpha.
30483 - Fix three memory leaks: one in circuit_build_times_parse_state(),
30484 one in dirvote_add_signatures_to_pending_consensus(), and one every
30485 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
30486 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
30488 o Code simplifications and refactoring:
30489 - Take a first step towards making or.h smaller by splitting out
30490 function definitions for all source files in src/or/. Leave
30491 structures and defines in or.h for now.
30492 - Remove a bunch of unused function declarations as well as a block of
30493 #if 0'd code from the unit tests. Closes bug 1824.
30494 - New unit tests for exit-port history statistics; refactored exit
30495 statistics code to be more easily tested.
30496 - Remove the old debian/ directory from the main Tor distribution.
30497 The official Tor-for-debian git repository lives at the URL
30498 https://git.torproject.org/debian/tor.git
30501 Changes in version 0.2.2.14-alpha - 2010-07-12
30502 Tor 0.2.2.14-alpha greatly improves client-side handling of
30503 circuit build timeouts, which are used to estimate speed and improve
30504 performance. We also move to a much better GeoIP database, port Tor to
30505 Windows CE, introduce new compile flags that improve code security,
30506 add an eighth v3 directory authority, and address a lot of more
30510 - Tor directory authorities no longer crash when started with a
30511 cached-microdesc-consensus file in their data directory. Bugfix
30512 on 0.2.2.6-alpha; fixes bug 1532.
30513 - Treat an unset $HOME like an empty $HOME rather than triggering an
30514 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
30515 - Ignore negative and large circuit build timeout values that can
30516 happen during a suspend or hibernate. These values caused various
30517 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
30518 - Alter calculation of Pareto distribution parameter 'Xm' for
30519 Circuit Build Timeout learning to use the weighted average of the
30520 top N=3 modes (because we have three entry guards). Considering
30521 multiple modes should improve the timeout calculation in some cases,
30522 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
30524 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
30525 right censored distribution model. This approach improves over the
30526 synthetic timeout generation approach that was producing insanely
30527 high timeout values. Now we calculate build timeouts using truncated
30528 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
30529 - Do not close circuits that are under construction when they reach
30530 the circuit build timeout. Instead, leave them building (but do not
30531 use them) for up until the time corresponding to the 95th percentile
30532 on the Pareto CDF or 60 seconds, whichever is greater. This is done
30533 to provide better data for the new Pareto model. This percentile
30534 can be controlled by the consensus.
30537 - Move to the June 2010 Maxmind GeoLite country db (rather than the
30538 June 2009 ip-to-country GeoIP db) for our statistics that count
30539 how many users relays are seeing from each country. Now we have
30540 more accurate data for many African countries.
30541 - Port Tor to build and run correctly on Windows CE systems, using
30542 the wcecompat library. Contributed by Valerio Lupi.
30543 - New "--enable-gcc-hardening" ./configure flag (off by default)
30544 to turn on gcc compile time hardening options. It ensures
30545 that signed ints have defined behavior (-fwrapv), enables
30546 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
30547 with canaries (-fstack-protector-all), turns on ASLR protection if
30548 supported by the kernel (-fPIE, -pie), and adds additional security
30549 related warnings. Verified to work on Mac OS X and Debian Lenny.
30550 - New "--enable-linker-hardening" ./configure flag (off by default)
30551 to turn on ELF specific hardening features (relro, now). This does
30552 not work with Mac OS X or any other non-ELF binary format.
30554 o New directory authorities:
30555 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
30559 - New config option "WarnUnsafeSocks 0" disables the warning that
30560 occurs whenever Tor receives a socks handshake using a version of
30561 the socks protocol that can only provide an IP address (rather
30562 than a hostname). Setups that do DNS locally over Tor are fine,
30563 and we shouldn't spam the logs in that case.
30564 - Convert the HACKING file to asciidoc, and add a few new sections
30565 to it, explaining how we use Git, how we make changelogs, and
30566 what should go in a patch.
30567 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
30568 event, to give information on the current rate of circuit timeouts
30569 over our stored history.
30570 - Add ability to disable circuit build time learning via consensus
30571 parameter and via a LearnCircuitBuildTimeout config option. Also
30572 automatically disable circuit build time calculation if we are
30573 either a AuthoritativeDirectory, or if we fail to write our state
30574 file. Fixes bug 1296.
30575 - More gracefully handle corrupt state files, removing asserts
30576 in favor of saving a backup and resetting state.
30577 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
30581 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
30583 - When a2x fails, mention that the user could disable manpages instead
30584 of trying to fix their asciidoc installation.
30585 - Where available, use Libevent 2.0's periodic timers so that our
30586 once-per-second cleanup code gets called even more closely to
30587 once per second than it would otherwise. Fixes bug 943.
30588 - If you run a bridge that listens on multiple IP addresses, and
30589 some user configures a bridge address that uses a different IP
30590 address than your bridge writes in its router descriptor, and the
30591 user doesn't specify an identity key, their Tor would discard the
30592 descriptor because "it isn't one of our configured bridges", and
30593 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
30594 Bugfix on 0.2.0.3-alpha.
30595 - If OpenSSL fails to make a duplicate of a private or public key, log
30596 an error message and try to exit cleanly. May help with debugging
30597 if bug 1209 ever remanifests.
30598 - Save a couple bytes in memory allocation every time we escape
30599 certain characters in a string. Patch from Florian Zumbiehl.
30600 - Make it explicit that we don't cannibalize one-hop circuits. This
30601 happens in the wild, but doesn't turn out to be a problem because
30602 we fortunately don't use those circuits. Many thanks to outofwords
30603 for the initial analysis and to swissknife who confirmed that
30604 two-hop circuits are actually created.
30605 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
30606 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
30607 - Eliminate a case where a circuit build time warning was displayed
30608 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
30611 Changes in version 0.2.1.26 - 2010-05-02
30612 Tor 0.2.1.26 addresses the recent connection and memory overload
30613 problems we've been seeing on relays, especially relays with their
30614 DirPort open. If your relay has been crashing, or you turned it off
30615 because it used too many resources, give this release a try.
30617 This release also fixes yet another instance of broken OpenSSL libraries
30618 that was causing some relays to drop out of the consensus.
30621 - Teach relays to defend themselves from connection overload. Relays
30622 now close idle circuits early if it looks like they were intended
30623 for directory fetches. Relays are also more aggressive about closing
30624 TLS connections that have no circuits on them. Such circuits are
30625 unlikely to be re-used, and tens of thousands of them were piling
30626 up at the fast relays, causing the relays to run out of sockets
30627 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30628 their directory fetches over TLS).
30629 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30630 that claim to be earlier than 0.9.8m, but which have in reality
30631 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30632 behavior. Possible fix for some cases of bug 1346.
30633 - Directory mirrors were fetching relay descriptors only from v2
30634 directory authorities, rather than v3 authorities like they should.
30635 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30636 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30639 - Finally get rid of the deprecated and now harmful notion of "clique
30640 mode", where directory authorities maintain TLS connections to
30644 - In the util/threads test, no longer free the test_mutex before all
30645 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30646 - The master thread could starve the worker threads quite badly on
30647 certain systems, causing them to run only partially in the allowed
30648 window. This resulted in test failures. Now the master thread sleeps
30649 occasionally for a few microseconds while the two worker-threads
30650 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30653 Changes in version 0.2.2.13-alpha - 2010-04-24
30654 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
30655 problems we've been seeing on relays, especially relays with their
30656 DirPort open. If your relay has been crashing, or you turned it off
30657 because it used too many resources, give this release a try.
30660 - Teach relays to defend themselves from connection overload. Relays
30661 now close idle circuits early if it looks like they were intended
30662 for directory fetches. Relays are also more aggressive about closing
30663 TLS connections that have no circuits on them. Such circuits are
30664 unlikely to be re-used, and tens of thousands of them were piling
30665 up at the fast relays, causing the relays to run out of sockets
30666 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30667 their directory fetches over TLS).
30670 - Finally get rid of the deprecated and now harmful notion of "clique
30671 mode", where directory authorities maintain TLS connections to
30673 - Directory authorities now do an immediate reachability check as soon
30674 as they hear about a new relay. This change should slightly reduce
30675 the time between setting up a relay and getting listed as running
30676 in the consensus. It should also improve the time between setting
30677 up a bridge and seeing use by bridge users.
30678 - Directory authorities no longer launch a TLS connection to every
30679 relay as they startup. Now that we have 2k+ descriptors cached,
30680 the resulting network hiccup is becoming a burden. Besides,
30681 authorities already avoid voting about Running for the first half
30682 hour of their uptime.
30685 Changes in version 0.2.2.12-alpha - 2010-04-20
30686 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
30687 handle and vote on descriptors. It was causing relays to drop out of
30691 - Many relays have been falling out of the consensus lately because
30692 not enough authorities know about their descriptor for them to get
30693 a majority of votes. When we deprecated the v2 directory protocol,
30694 we got rid of the only way that v3 authorities can hear from each
30695 other about other descriptors. Now authorities examine every v3
30696 vote for new descriptors, and fetch them from that authority. Bugfix
30698 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
30699 and a warning in or.h related to bandwidth_weight_rule_t that
30700 prevented clean compile on OS X. Fixes bug 1363; bugfix on
30702 - Fix a segfault on relays when DirReqStatistics is enabled
30703 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
30707 - Demote a confusing TLS warning that relay operators might get when
30708 someone tries to talk to their OrPort. It is neither the operator's
30709 fault nor can they do anything about it. Fixes bug 1364; bugfix
30713 Changes in version 0.2.2.11-alpha - 2010-04-15
30714 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
30715 libraries that was causing some relays to drop out of the consensus.
30718 - Directory mirrors were fetching relay descriptors only from v2
30719 directory authorities, rather than v3 authorities like they should.
30720 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30721 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30722 - Fix a parsing error that made every possible value of
30723 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
30724 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
30725 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
30726 about the option without breaking older ones.
30727 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30728 that claim to be earlier than 0.9.8m, but which have in reality
30729 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30730 behavior. Possible fix for some cases of bug 1346.
30733 - Experiment with a more aggressive approach to preventing clients
30734 from making one-hop exit streams. Exit relays who want to try it
30735 out can set "RefuseUnknownExits 1" in their torrc, and then look
30736 for "Attempt by %s to open a stream" log messages. Let us know
30738 - Add support for statically linking zlib by specifying
30739 --enable-static-zlib, to go with our support for statically linking
30740 openssl and libevent. Resolves bug 1358.
30743 - Fix a segfault that happens whenever a Tor client that is using
30744 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
30746 - When we cleaned up the contrib/tor-exit-notice.html file, we left
30747 out the first line. Fixes bug 1295.
30748 - When building the manpage from a tarball, we required asciidoc, but
30749 the asciidoc -> roff/html conversion was already done for the
30750 tarball. Make 'make' complain only when we need asciidoc (either
30751 because we're compiling directly from git, or because we altered
30752 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
30753 - When none of the directory authorities vote on any params, Tor
30754 segfaulted when trying to make the consensus from the votes. We
30755 didn't trigger the bug in practice, because authorities do include
30756 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
30759 - In the util/threads test, no longer free the test_mutex before all
30760 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30761 - The master thread could starve the worker threads quite badly on
30762 certain systems, causing them to run only partially in the allowed
30763 window. This resulted in test failures. Now the master thread sleeps
30764 occasionally for a few microseconds while the two worker-threads
30765 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30768 Changes in version 0.2.2.10-alpha - 2010-03-07
30769 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
30770 could prevent relays from guessing their IP address correctly. It also
30771 starts the groundwork for another client-side performance boost, since
30772 currently we're not making efficient use of relays that have both the
30773 Guard flag and the Exit flag.
30776 - Fix a regression from our patch for bug 1244 that caused relays
30777 to guess their IP address incorrectly if they didn't set Address
30778 in their torrc and/or their address fails to resolve. Bugfix on
30779 0.2.2.9-alpha; fixes bug 1269.
30781 o Major features (performance):
30782 - Directory authorities now compute consensus weightings that instruct
30783 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
30784 and no flag. Clients that use these weightings will distribute
30785 network load more evenly across these different relay types. The
30786 weightings are in the consensus so we can change them globally in
30787 the future. Extra thanks to "outofwords" for finding some nasty
30788 security bugs in the first implementation of this feature.
30790 o Minor features (performance):
30791 - Always perform router selections using weighted relay bandwidth,
30792 even if we don't need a high capacity circuit at the time. Non-fast
30793 circuits now only differ from fast ones in that they can use relays
30794 not marked with the Fast flag. This "feature" could turn out to
30795 be a horrible bug; we should investigate more before it goes into
30799 - Allow disabling building of the manpages. Skipping the manpage
30800 speeds up the build considerably.
30802 o Minor bugfixes (on 0.2.2.x):
30803 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
30804 Bugfix on 0.2.2.9-alpha.
30805 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
30806 config option. Bugfix on 0.2.2.7-alpha.
30807 - Ship the asciidoc-helper file in the tarball, so that people can
30808 build from source if they want to, and touching the .1.txt files
30809 doesn't break the build. Bugfix on 0.2.2.9-alpha.
30811 o Minor bugfixes (on 0.2.1.x or earlier):
30812 - Fix a dereference-then-NULL-check sequence when publishing
30813 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30815 - Fix another dereference-then-NULL-check sequence. Bugfix on
30816 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30817 - Make sure we treat potentially not NUL-terminated strings correctly.
30818 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30820 o Code simplifications and refactoring:
30821 - Fix some urls in the exit notice file and make it XHTML1.1 strict
30822 compliant. Based on a patch from Christian Kujau.
30823 - Don't use sed in asciidoc-helper anymore.
30824 - Make the build process fail if asciidoc cannot be found and
30825 building with asciidoc isn't disabled.
30828 Changes in version 0.2.2.9-alpha - 2010-02-22
30829 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
30830 location of a directory authority, and cleans up a bunch of small bugs.
30832 o Directory authority changes:
30833 - Change IP address for dannenberg (v3 directory authority), and
30834 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30835 service directory authority) from the list.
30838 - Make Tor work again on the latest OS X: when deciding whether to
30839 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30840 version at run-time, not compile time. We need to do this because
30841 Apple doesn't update its dev-tools headers when it updates its
30842 libraries in a security patch.
30843 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30844 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30845 a memory leak when requesting a hidden service descriptor we've
30846 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30848 - Authorities could be tricked into giving out the Exit flag to relays
30849 that didn't allow exiting to any ports. This bug could screw
30850 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
30851 1238. Bug discovered by Martin Kowalczyk.
30852 - When freeing a session key, zero it out completely. We only zeroed
30853 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30854 patched by ekir. Fixes bug 1254.
30857 - Fix static compilation by listing the openssl libraries in the right
30858 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
30859 - Resume handling .exit hostnames in a special way: originally we
30860 stripped the .exit part and used the requested exit relay. In
30861 0.2.2.1-alpha we stopped treating them in any special way, meaning
30862 if you use a .exit address then Tor will pass it on to the exit
30863 relay. Now we reject the .exit stream outright, since that behavior
30864 might be more expected by the user. Found and diagnosed by Scott
30865 Bennett and Downie on or-talk.
30866 - Don't spam the controller with events when we have no file
30867 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
30868 for log messages was already solved from bug 748.)
30869 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
30871 - Make the DNSPort option work with libevent 2.x. Don't alter the
30872 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
30873 - Emit a GUARD DROPPED controller event for a case we missed.
30874 - Make more fields in the controller protocol case-insensitive, since
30875 control-spec.txt said they were.
30876 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30877 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30878 - Fix a spec conformance issue: the network-status-version token
30879 must be the first token in a v3 consensus or vote. Discovered by
30880 parakeep. Bugfix on 0.2.0.3-alpha.
30882 o Code simplifications and refactoring:
30883 - Generate our manpage and HTML documentation using Asciidoc. This
30884 change should make it easier to maintain the documentation, and
30885 produce nicer HTML.
30886 - Remove the --enable-iphone option. According to reports from Marco
30887 Bonetti, Tor builds fine without any special tweaking on recent
30888 iPhone SDK versions.
30889 - Removed some unnecessary files from the source distribution. The
30890 AUTHORS file has now been merged into the people page on the
30891 website. The roadmaps and design doc can now be found in the
30892 projects directory in svn.
30893 - Enabled various circuit build timeout constants to be controlled
30894 by consensus parameters. Also set better defaults for these
30895 parameters based on experimentation on broadband and simulated
30896 high latency links.
30899 - The 'EXTENDCIRCUIT' control port command can now be used with
30900 a circ id of 0 and no path. This feature will cause Tor to build
30901 a new 'fast' general purpose circuit using its own path selection
30903 - Added a BUILDTIMEOUT_SET controller event to describe changes
30904 to the circuit build timeout.
30905 - Future-proof the controller protocol a bit by ignoring keyword
30906 arguments we do not recognize.
30907 - Expand homedirs passed to tor-checkkey. This should silence a
30908 coverity complaint about passing a user-supplied string into
30909 open() without checking it.
30912 Changes in version 0.2.1.25 - 2010-03-16
30913 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
30914 prevent relays from guessing their IP address correctly. It also fixes
30915 several minor potential security bugs.
30918 - Fix a regression from our patch for bug 1244 that caused relays
30919 to guess their IP address incorrectly if they didn't set Address
30920 in their torrc and/or their address fails to resolve. Bugfix on
30921 0.2.1.23; fixes bug 1269.
30922 - When freeing a session key, zero it out completely. We only zeroed
30923 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30924 patched by ekir. Fixes bug 1254.
30927 - Fix a dereference-then-NULL-check sequence when publishing
30928 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30930 - Fix another dereference-then-NULL-check sequence. Bugfix on
30931 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30932 - Make sure we treat potentially not NUL-terminated strings correctly.
30933 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30937 Changes in version 0.2.1.24 - 2010-02-21
30938 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
30942 - Work correctly out-of-the-box with even more vendor-patched versions
30943 of OpenSSL. In particular, make it so Debian and OS X don't need
30944 customized patches to run/build.
30947 Changes in version 0.2.1.23 - 2010-02-13
30948 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
30949 again on the latest OS X, and updates the location of a directory
30952 o Major bugfixes (performance):
30953 - We were selecting our guards uniformly at random, and then weighting
30954 which of our guards we'd use uniformly at random. This imbalance
30955 meant that Tor clients were severely limited on throughput (and
30956 probably latency too) by the first hop in their circuit. Now we
30957 select guards weighted by currently advertised bandwidth. We also
30958 automatically discard guards picked using the old algorithm. Fixes
30959 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30962 - Make Tor work again on the latest OS X: when deciding whether to
30963 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30964 version at run-time, not compile time. We need to do this because
30965 Apple doesn't update its dev-tools headers when it updates its
30966 libraries in a security patch.
30967 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30968 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30969 a memory leak when requesting a hidden service descriptor we've
30970 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30973 o Directory authority changes:
30974 - Change IP address for dannenberg (v3 directory authority), and
30975 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30976 service directory authority) from the list.
30979 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30980 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30983 - Avoid a mad rush at the beginning of each month when each client
30984 rotates half of its guards. Instead we spread the rotation out
30985 throughout the month, but we still avoid leaving a precise timestamp
30986 in the state file about when we first picked the guard. Improves
30987 over the behavior introduced in 0.1.2.17.
30990 Changes in version 0.2.2.8-alpha - 2010-01-26
30991 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
30992 causing bridge relays to disappear. If you're running a bridge,
30996 - Fix a memory corruption bug on bridges that occurred during the
30997 inclusion of stats data in extra-info descriptors. Also fix the
30998 interface for geoip_get_bridge_stats* to prevent similar bugs in
30999 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
31000 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
31003 - Ignore OutboundBindAddress when connecting to localhost.
31004 Connections to localhost need to come _from_ localhost, or else
31005 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
31009 Changes in version 0.2.2.7-alpha - 2010-01-19
31010 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
31011 as laying the groundwork for further relay-side performance fixes. It
31012 also starts cleaning up client behavior with respect to the EntryNodes,
31013 ExitNodes, and StrictNodes config options.
31015 This release also rotates two directory authority keys, due to a
31016 security breach of some of the Torproject servers.
31018 o Directory authority changes:
31019 - Rotate keys (both v3 identity and relay identity) for moria1
31022 o Major features (performance):
31023 - We were selecting our guards uniformly at random, and then weighting
31024 which of our guards we'd use uniformly at random. This imbalance
31025 meant that Tor clients were severely limited on throughput (and
31026 probably latency too) by the first hop in their circuit. Now we
31027 select guards weighted by currently advertised bandwidth. We also
31028 automatically discard guards picked using the old algorithm. Fixes
31029 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
31030 - When choosing which cells to relay first, relays can now favor
31031 circuits that have been quiet recently, to provide lower latency
31032 for low-volume circuits. By default, relays enable or disable this
31033 feature based on a setting in the consensus. You can override
31034 this default by using the new "CircuitPriorityHalflife" config
31035 option. Design and code by Ian Goldberg, Can Tang, and Chris
31037 - Add separate per-conn write limiting to go with the per-conn read
31038 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
31039 but never per-conn write limits.
31040 - New consensus params "bwconnrate" and "bwconnburst" to let us
31041 rate-limit client connections as they enter the network. It's
31042 controlled in the consensus so we can turn it on and off for
31043 experiments. It's starting out off. Based on proposal 163.
31045 o Major features (relay selection options):
31046 - Switch to a StrictNodes config option, rather than the previous
31047 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
31048 "StrictExcludeNodes" option.
31049 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
31050 change during a config reload, mark and discard all our origin
31051 circuits. This fix should address edge cases where we change the
31052 config options and but then choose a circuit that we created before
31054 - If EntryNodes or ExitNodes are set, be more willing to use an
31055 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
31057 - Make EntryNodes config option much more aggressive even when
31058 StrictNodes is not set. Before it would prepend your requested
31059 entrynodes to your list of guard nodes, but feel free to use others
31060 after that. Now it chooses only from your EntryNodes if any of
31061 those are available, and only falls back to others if a) they're
31062 all down and b) StrictNodes is not set.
31063 - Now we refresh your entry guards from EntryNodes at each consensus
31064 fetch -- rather than just at startup and then they slowly rot as
31065 the network changes.
31068 - Stop bridge directory authorities from answering dbg-stability.txt
31069 directory queries, which would let people fetch a list of all
31070 bridge identities they track. Bugfix on 0.2.1.6-alpha.
31073 - Log a notice when we get a new control connection. Now it's easier
31074 for security-conscious users to recognize when a local application
31075 is knocking on their controller door. Suggested by bug 1196.
31076 - New config option "CircuitStreamTimeout" to override our internal
31077 timeout schedule for how many seconds until we detach a stream from
31078 a circuit and try a new circuit. If your network is particularly
31079 slow, you might want to set this to a number like 60.
31080 - New controller command "getinfo config-text". It returns the
31081 contents that Tor would write if you send it a SAVECONF command,
31082 so the controller can write the file to disk itself.
31083 - New options for SafeLogging to allow scrubbing only log messages
31084 generated while acting as a relay.
31085 - Ship the bridges spec file in the tarball too.
31086 - Avoid a mad rush at the beginning of each month when each client
31087 rotates half of its guards. Instead we spread the rotation out
31088 throughout the month, but we still avoid leaving a precise timestamp
31089 in the state file about when we first picked the guard. Improves
31090 over the behavior introduced in 0.1.2.17.
31092 o Minor bugfixes (compiling):
31093 - Fix compilation on OS X 10.3, which has a stub mlockall() but
31094 hides it. Bugfix on 0.2.2.6-alpha.
31095 - Fix compilation on Solaris by removing support for the
31096 DisableAllSwap config option. Solaris doesn't have an rlimit for
31097 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
31100 o Minor bugfixes (crashes):
31101 - Do not segfault when writing buffer stats when we haven't observed
31102 a single circuit to report about. Found by Fabian Lanze. Bugfix on
31104 - If we're in the pathological case where there's no exit bandwidth
31105 but there is non-exit bandwidth, or no guard bandwidth but there
31106 is non-guard bandwidth, don't crash during path selection. Bugfix
31108 - Fix an impossible-to-actually-trigger buffer overflow in relay
31109 descriptor generation. Bugfix on 0.1.0.15.
31111 o Minor bugfixes (privacy):
31112 - Fix an instance where a Tor directory mirror might accidentally
31113 log the IP address of a misbehaving Tor client. Bugfix on
31115 - Don't list Windows capabilities in relay descriptors. We never made
31116 use of them, and maybe it's a bad idea to publish them. Bugfix
31119 o Minor bugfixes (other):
31120 - Resolve an edge case in path weighting that could make us misweight
31121 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
31122 - Fix statistics on client numbers by country as seen by bridges that
31123 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
31124 intervals instead of variable 12-to-48-hour intervals.
31125 - After we free an internal connection structure, overwrite it
31126 with a different memory value than we use for overwriting a freed
31127 internal circuit structure. Should help with debugging. Suggested
31129 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
31132 o Removed features:
31133 - Remove the HSAuthorityRecordStats option that version 0 hidden
31134 service authorities could have used to track statistics of overall
31135 hidden service usage.
31138 Changes in version 0.2.1.22 - 2010-01-19
31139 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
31140 authorities -- it would tell you its whole history of bridge descriptors
31141 if you make the right directory request. This stable update also
31142 rotates two of the seven v3 directory authority keys and locations.
31144 o Directory authority changes:
31145 - Rotate keys (both v3 identity and relay identity) for moria1
31149 - Stop bridge directory authorities from answering dbg-stability.txt
31150 directory queries, which would let people fetch a list of all
31151 bridge identities they track. Bugfix on 0.2.1.6-alpha.
31154 Changes in version 0.2.1.21 - 2009-12-21
31155 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
31156 library. If you use Tor on Linux / Unix and you're getting SSL
31157 renegotiation errors, upgrading should help. We also recommend an
31158 upgrade if you're an exit relay.
31161 - Work around a security feature in OpenSSL 0.9.8l that prevents our
31162 handshake from working unless we explicitly tell OpenSSL that we
31163 are using SSL renegotiation safely. We are, of course, but OpenSSL
31164 0.9.8l won't work unless we say we are.
31165 - Avoid crashing if the client is trying to upload many bytes and the
31166 circuit gets torn down at the same time, or if the flip side
31167 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
31170 - Do not refuse to learn about authority certs and v2 networkstatus
31171 documents that are older than the latest consensus. This bug might
31172 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
31173 Spotted and fixed by xmux.
31174 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
31175 trigger platform-specific option misparsing case found by Coverity
31177 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
31178 trigger assert. Fixes bug 1173.
31181 Changes in version 0.2.2.6-alpha - 2009-11-19
31182 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
31183 support for the new lower-footprint "microdescriptor" directory design,
31184 future-proofing our consensus format against new hash functions or
31185 other changes, and an Android port. It also makes Tor compatible with
31186 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
31189 - Directory authorities can now create, vote on, and serve multiple
31190 parallel formats of directory data as part of their voting process.
31191 Partially implements Proposal 162: "Publish the consensus in
31193 - Directory authorities can now agree on and publish small summaries
31194 of router information that clients can use in place of regular
31195 server descriptors. This transition will eventually allow clients
31196 to use far less bandwidth for downloading information about the
31197 network. Begins the implementation of Proposal 158: "Clients
31198 download consensus + microdescriptors".
31199 - The directory voting system is now extensible to use multiple hash
31200 algorithms for signatures and resource selection. Newer formats
31201 are signed with SHA256, with a possibility for moving to a better
31202 hash algorithm in the future.
31203 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
31204 current and future memory pages via mlockall(). On supported
31205 platforms (modern Linux and probably BSD but not Windows or OS X),
31206 this should effectively disable any and all attempts to page out
31207 memory. This option requires that you start your Tor as root --
31208 if you use DisableAllSwap, please consider using the User option
31209 to properly reduce the privileges of your Tor.
31210 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
31211 to help Tor build correctly for Android phones.
31214 - Work around a security feature in OpenSSL 0.9.8l that prevents our
31215 handshake from working unless we explicitly tell OpenSSL that we
31216 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
31217 won't work unless we say we are.
31220 - Fix a crash bug when trying to initialize the evdns module in
31221 Libevent 2. Bugfix on 0.2.1.16-rc.
31222 - Stop logging at severity 'warn' when some other Tor client tries
31223 to establish a circuit with us using weak DH keys. It's a protocol
31224 violation, but that doesn't mean ordinary users need to hear about
31225 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
31226 - Do not refuse to learn about authority certs and v2 networkstatus
31227 documents that are older than the latest consensus. This bug might
31228 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
31229 Spotted and fixed by xmux.
31230 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
31231 - If all authorities restart at once right before a consensus vote,
31232 nobody will vote about "Running", and clients will get a consensus
31233 with no usable relays. Instead, authorities refuse to build a
31234 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
31235 - If your relay can't keep up with the number of incoming create
31236 cells, it would log one warning per failure into your logs. Limit
31237 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
31238 - Bridges now use "reject *:*" as their default exit policy. Bugfix
31239 on 0.2.0.3-alpha; fixes bug 1113.
31240 - Fix a memory leak on directory authorities during voting that was
31241 introduced in 0.2.2.1-alpha. Found via valgrind.
31244 Changes in version 0.2.1.20 - 2009-10-15
31245 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
31246 services at once, prepares for more performance improvements, and
31247 fixes a bunch of smaller bugs.
31249 The Windows and OS X bundles also include a more recent Vidalia,
31250 and switch from Privoxy to Polipo.
31252 The OS X installers are now drag and drop. It's best to un-install
31253 Tor/Vidalia and then install this new bundle, rather than upgrade. If
31254 you want to upgrade, you'll need to update the paths for Tor and Polipo
31255 in the Vidalia Settings window.
31258 - Send circuit or stream sendme cells when our window has decreased
31259 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
31260 by Karsten when testing the "reduce circuit window" performance
31261 patch. Bugfix on the 54th commit on Tor -- from July 2002,
31262 before the release of Tor 0.0.0. This is the new winner of the
31264 - Fix a remotely triggerable memory leak when a consensus document
31265 contains more than one signature from the same voter. Bugfix on
31267 - Avoid segfault in rare cases when finishing an introduction circuit
31268 as a client and finding out that we don't have an introduction key
31269 for it. Fixes bug 1073. Reported by Aaron Swartz.
31272 - Tor now reads the "circwindow" parameter out of the consensus,
31273 and uses that value for its circuit package window rather than the
31274 default of 1000 cells. Begins the implementation of proposal 168.
31276 o New directory authorities:
31277 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
31279 - Move moria1 and tonga to alternate IP addresses.
31282 - Fix a signed/unsigned compile warning in 0.2.1.19.
31283 - Fix possible segmentation fault on directory authorities. Bugfix on
31285 - Fix an extremely rare infinite recursion bug that could occur if
31286 we tried to log a message after shutting down the log subsystem.
31287 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
31288 - Fix an obscure bug where hidden services on 64-bit big-endian
31289 systems might mis-read the timestamp in v3 introduce cells, and
31290 refuse to connect back to the client. Discovered by "rotor".
31291 Bugfix on 0.2.1.6-alpha.
31292 - We were triggering a CLOCK_SKEW controller status event whenever
31293 we connect via the v2 connection protocol to any relay that has
31294 a wrong clock. Instead, we should only inform the controller when
31295 it's a trusted authority that claims our clock is wrong. Bugfix
31296 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31297 - We were telling the controller about CHECKING_REACHABILITY and
31298 REACHABILITY_FAILED status events whenever we launch a testing
31299 circuit or notice that one has failed. Instead, only tell the
31300 controller when we want to inform the user of overall success or
31301 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31303 - Don't warn when we're using a circuit that ends with a node
31304 excluded in ExcludeExitNodes, but the circuit is not used to access
31305 the outside world. This should help fix bug 1090. Bugfix on
31307 - Work around a small memory leak in some versions of OpenSSL that
31308 stopped the memory used by the hostname TLS extension from being
31312 - Add a "getinfo status/accepted-server-descriptor" controller
31313 command, which is the recommended way for controllers to learn
31314 whether our server descriptor has been successfully received by at
31315 least on directory authority. Un-recommend good-server-descriptor
31316 getinfo and status events until we have a better design for them.
31319 Changes in version 0.2.2.5-alpha - 2009-10-11
31320 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
31323 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
31325 o Directory authorities:
31326 - Temporarily (just for this release) move dizum to an alternate
31330 Changes in version 0.2.2.4-alpha - 2009-10-10
31331 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
31332 introduces a new unit test framework, shifts directry authority
31333 addresses around to reduce the impact from recent blocking events,
31334 and fixes a few smaller bugs.
31337 - Fix several more asserts in the circuit_build_times code, for
31338 example one that causes Tor to fail to start once we have
31339 accumulated 5000 build times in the state file. Bugfixes on
31340 0.2.2.2-alpha; fixes bug 1108.
31342 o New directory authorities:
31343 - Move moria1 and Tonga to alternate IP addresses.
31346 - Log SSL state transitions at debug level during handshake, and
31347 include SSL states in error messages. This may help debug future
31348 SSL handshake issues.
31349 - Add a new "Handshake" log domain for activities that happen
31350 during the TLS handshake.
31351 - Revert to the "June 3 2009" ip-to-country file. The September one
31352 seems to have removed most US IP addresses.
31353 - Directory authorities now reject Tor relays with versions less than
31354 0.1.2.14. This step cuts out four relays from the current network,
31355 none of which are very big.
31358 - Fix a couple of smaller issues with gathering statistics. Bugfixes
31360 - Fix two memory leaks in the error case of
31361 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
31362 - Don't count one-hop circuits when we're estimating how long it
31363 takes circuits to build on average. Otherwise we'll set our circuit
31364 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
31365 - Directory authorities no longer change their opinion of, or vote on,
31366 whether a router is Running, unless they have themselves been
31367 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
31370 o Code simplifications and refactoring:
31371 - Revise our unit tests to use the "tinytest" framework, so we
31372 can run tests in their own processes, have smarter setup/teardown
31373 code, and so on. The unit test code has moved to its own
31374 subdirectory, and has been split into multiple modules.
31377 Changes in version 0.2.2.3-alpha - 2009-09-23
31378 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
31381 - Fix an overzealous assert in our new circuit build timeout code.
31382 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
31385 - If the networkstatus consensus tells us that we should use a
31386 negative circuit package window, ignore it. Otherwise we'll
31387 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
31390 Changes in version 0.2.2.2-alpha - 2009-09-21
31391 Tor 0.2.2.2-alpha introduces our latest performance improvement for
31392 clients: Tor tracks the average time it takes to build a circuit, and
31393 avoids using circuits that take too long to build. For fast connections,
31394 this feature can cut your expected latency in half. For slow or flaky
31395 connections, it could ruin your Tor experience. Let us know if it does!
31398 - Tor now tracks how long it takes to build client-side circuits
31399 over time, and adapts its timeout to local network performance.
31400 Since a circuit that takes a long time to build will also provide
31401 bad performance, we get significant latency improvements by
31402 discarding the slowest 20% of circuits. Specifically, Tor creates
31403 circuits more aggressively than usual until it has enough data
31404 points for a good timeout estimate. Implements proposal 151.
31405 We are especially looking for reports (good and bad) from users with
31406 both EDGE and broadband connections that can move from broadband
31407 to EDGE and find out if the build-time data in the .tor/state gets
31408 reset without loss of Tor usability. You should also see a notice
31409 log message telling you that Tor has reset its timeout.
31410 - Directory authorities can now vote on arbitrary integer values as
31411 part of the consensus process. This is designed to help set
31412 network-wide parameters. Implements proposal 167.
31413 - Tor now reads the "circwindow" parameter out of the consensus,
31414 and uses that value for its circuit package window rather than the
31415 default of 1000 cells. Begins the implementation of proposal 168.
31418 - Fix a remotely triggerable memory leak when a consensus document
31419 contains more than one signature from the same voter. 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 parsing for memory or time units given without a space between
31427 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
31428 - A networkstatus vote must contain exactly one signature. Spec
31429 conformance issue. Bugfix on 0.2.0.3-alpha.
31430 - Fix an obscure bug where hidden services on 64-bit big-endian
31431 systems might mis-read the timestamp in v3 introduce cells, and
31432 refuse to connect back to the client. Discovered by "rotor".
31433 Bugfix on 0.2.1.6-alpha.
31434 - We were triggering a CLOCK_SKEW controller status event whenever
31435 we connect via the v2 connection protocol to any relay that has
31436 a wrong clock. Instead, we should only inform the controller when
31437 it's a trusted authority that claims our clock is wrong. Bugfix
31438 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31439 - We were telling the controller about CHECKING_REACHABILITY and
31440 REACHABILITY_FAILED status events whenever we launch a testing
31441 circuit or notice that one has failed. Instead, only tell the
31442 controller when we want to inform the user of overall success or
31443 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31445 - Don't warn when we're using a circuit that ends with a node
31446 excluded in ExcludeExitNodes, but the circuit is not used to access
31447 the outside world. This should help fix bug 1090, but more problems
31448 remain. Bugfix on 0.2.1.6-alpha.
31449 - Work around a small memory leak in some versions of OpenSSL that
31450 stopped the memory used by the hostname TLS extension from being
31452 - Make our 'torify' script more portable; if we have only one of
31453 'torsocks' or 'tsocks' installed, don't complain to the user;
31454 and explain our warning about tsocks better.
31457 - Add a "getinfo status/accepted-server-descriptor" controller
31458 command, which is the recommended way for controllers to learn
31459 whether our server descriptor has been successfully received by at
31460 least on directory authority. Un-recommend good-server-descriptor
31461 getinfo and status events until we have a better design for them.
31462 - Update to the "September 4 2009" ip-to-country file.
31465 Changes in version 0.2.2.1-alpha - 2009-08-26
31466 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
31467 Tor clients to bootstrap on networks where only port 80 is reachable,
31468 makes it more straightforward to support hardware crypto accelerators,
31469 and starts the groundwork for gathering stats safely at relays.
31472 - Start the process of disabling ".exit" address notation, since it
31473 can be used for a variety of esoteric application-level attacks
31474 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
31477 o New directory authorities:
31478 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
31482 - New AccelName and AccelDir options add support for dynamic OpenSSL
31483 hardware crypto acceleration engines.
31484 - Tor now supports tunneling all of its outgoing connections over
31485 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
31486 configuration options. Code by Christopher Davis.
31489 - Send circuit or stream sendme cells when our window has decreased
31490 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
31491 by Karsten when testing the "reduce circuit window" performance
31492 patch. Bugfix on the 54th commit on Tor -- from July 2002,
31493 before the release of Tor 0.0.0. This is the new winner of the
31496 o New options for gathering stats safely:
31497 - Directory mirrors that set "DirReqStatistics 1" write statistics
31498 about directory requests to disk every 24 hours. As compared to the
31499 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
31500 1) stats are written to disk exactly every 24 hours; 2) estimated
31501 shares of v2 and v3 requests are determined as mean values, not at
31502 the end of a measurement period; 3) unresolved requests are listed
31503 with country code '??'; 4) directories also measure download times.
31504 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
31505 number of exit streams and transferred bytes per port to disk every
31507 - Relays that set "CellStatistics 1" write statistics on how long
31508 cells spend in their circuit queues to disk every 24 hours.
31509 - Entry nodes that set "EntryStatistics 1" write statistics on the
31510 rough number and origins of connecting clients to disk every 24
31512 - Relays that write any of the above statistics to disk and set
31513 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
31514 their extra-info documents.
31517 - New --digests command-line switch to output the digests of the
31518 source files Tor was built with.
31519 - The "torify" script now uses torsocks where available.
31520 - The memarea code now uses a sentinel value at the end of each area
31521 to make sure nothing writes beyond the end of an area. This might
31522 help debug some conceivable causes of bug 930.
31523 - Time and memory units in the configuration file can now be set to
31524 fractional units. For example, "2.5 GB" is now a valid value for
31526 - Certain Tor clients (such as those behind check.torproject.org) may
31527 want to fetch the consensus in an extra early manner. To enable this
31528 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
31529 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
31530 as only certain clients who must have this information sooner should
31532 - Instead of adding the svn revision to the Tor version string, report
31533 the git commit (when we're building from a git checkout).
31536 - If any of the v3 certs we download are unparseable, we should
31537 actually notice the failure so we don't retry indefinitely. Bugfix
31538 on 0.2.0.x; reported by "rotator".
31539 - If the cached cert file is unparseable, warn but don't exit.
31540 - Fix possible segmentation fault on directory authorities. Bugfix on
31542 - When Tor fails to parse a descriptor of any kind, dump it to disk.
31543 Might help diagnosing bug 1051.
31545 o Deprecated and removed features:
31546 - The controller no longer accepts the old obsolete "addr-mappings/"
31547 or "unregistered-servers-" GETINFO values.
31548 - Hidden services no longer publish version 0 descriptors, and clients
31549 do not request or use version 0 descriptors. However, the old hidden
31550 service authorities still accept and serve version 0 descriptors
31551 when contacted by older hidden services/clients.
31552 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
31553 always on; using them is necessary for correct forward-compatible
31555 - Remove support for .noconnect style addresses. Nobody was using
31556 them, and they provided another avenue for detecting Tor users
31557 via application-level web tricks.
31559 o Packaging changes:
31560 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
31561 installer bundles. See
31562 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
31563 for details of what's new in Vidalia 0.2.3.
31564 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
31565 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
31566 configuration file, rather than the old Privoxy.
31567 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
31568 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
31569 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
31570 better compatibility with OS X 10.6, aka Snow Leopard.
31571 - OS X Vidalia Bundle: The multi-package installer is now replaced
31572 by a simple drag and drop to the /Applications folder. This change
31573 occurred with the upgrade to Vidalia 0.2.3.
31576 Changes in version 0.2.1.19 - 2009-07-28
31577 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
31578 services on Tor 0.2.1.3-alpha through 0.2.1.18.
31581 - Make accessing hidden services on 0.2.1.x work right again.
31582 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
31583 part of patch provided by "optimist".
31586 - When a relay/bridge is writing out its identity key fingerprint to
31587 the "fingerprint" file and to its logs, write it without spaces. Now
31588 it will look like the fingerprints in our bridges documentation,
31589 and confuse fewer users.
31592 - Relays no longer publish a new server descriptor if they change
31593 their MaxAdvertisedBandwidth config option but it doesn't end up
31594 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
31595 fixes bug 1026. Patch from Sebastian.
31596 - Avoid leaking memory every time we get a create cell but we have
31597 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
31598 fixes bug 1034. Reported by BarkerJr.
31601 Changes in version 0.2.1.18 - 2009-07-24
31602 Tor 0.2.1.18 lays the foundations for performance improvements,
31603 adds status events to help users diagnose bootstrap problems, adds
31604 optional authentication/authorization for hidden services, fixes a
31605 variety of potential anonymity problems, and includes a huge pile of
31606 other features and bug fixes.
31609 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
31612 Changes in version 0.2.1.17-rc - 2009-07-07
31613 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
31614 candidate for the 0.2.1.x series. It lays the groundwork for further
31615 client performance improvements, and also fixes a big bug with directory
31616 authorities that were causing them to assign Guard and Stable flags
31619 The Windows bundles also finally include the geoip database that we
31620 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
31621 should actually install Torbutton rather than giving you a cryptic
31622 failure message (oops).
31625 - Clients now use the bandwidth values in the consensus, rather than
31626 the bandwidth values in each relay descriptor. This approach opens
31627 the door to more accurate bandwidth estimates once the directory
31628 authorities start doing active measurements. Implements more of
31632 - When Tor clients restart after 1-5 days, they discard all their
31633 cached descriptors as too old, but they still use the cached
31634 consensus document. This approach is good for robustness, but
31635 bad for performance: since they don't know any bandwidths, they
31636 end up choosing at random rather than weighting their choice by
31637 speed. Fixed by the above feature of putting bandwidths in the
31638 consensus. Bugfix on 0.2.0.x.
31639 - Directory authorities were neglecting to mark relays down in their
31640 internal histories if the relays fall off the routerlist without
31641 ever being found unreachable. So there were relays in the histories
31642 that haven't been seen for eight months, and are listed as being
31643 up for eight months. This wreaked havoc on the "median wfu"
31644 and "median mtbf" calculations, in turn making Guard and Stable
31645 flags very wrong, hurting network performance. Fixes bugs 696 and
31646 969. Bugfix on 0.2.0.6-alpha.
31649 - Serve the DirPortFrontPage page even when we have been approaching
31650 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
31651 - The control port would close the connection before flushing long
31652 replies, such as the network consensus, if a QUIT command was issued
31653 before the reply had completed. Now, the control port flushes all
31654 pending replies before closing the connection. Also fixed a spurious
31655 warning when a QUIT command is issued after a malformed or rejected
31656 AUTHENTICATE command, but before the connection was closed. Patch
31657 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
31658 - When we can't find an intro key for a v2 hidden service descriptor,
31659 fall back to the v0 hidden service descriptor and log a bug message.
31660 Workaround for bug 1024.
31661 - Fix a log message that did not respect the SafeLogging option.
31665 - If we're a relay and we change our IP address, be more verbose
31666 about the reason that made us change. Should help track down
31667 further bugs for relays on dynamic IP addresses.
31670 Changes in version 0.2.0.35 - 2009-06-24
31672 - Avoid crashing in the presence of certain malformed descriptors.
31673 Found by lark, and by automated fuzzing.
31674 - Fix an edge case where a malicious exit relay could convince a
31675 controller that the client's DNS question resolves to an internal IP
31676 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31679 - Finally fix the bug where dynamic-IP relays disappear when their
31680 IP address changes: directory mirrors were mistakenly telling
31681 them their old address if they asked via begin_dir, so they
31682 never got an accurate answer about their new address, so they
31683 just vanished after a day. For belt-and-suspenders, relays that
31684 don't set Address in their config now avoid using begin_dir for
31685 all direct connections. Should fix bugs 827, 883, and 900.
31686 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31687 that would occur on some exit nodes when DNS failures and timeouts
31688 occurred in certain patterns. Fix for bug 957.
31691 - When starting with a cache over a few days old, do not leak
31692 memory for the obsolete router descriptors in it. Bugfix on
31693 0.2.0.33; fixes bug 672.
31694 - Hidden service clients didn't use a cached service descriptor that
31695 was older than 15 minutes, but wouldn't fetch a new one either,
31696 because there was already one in the cache. Now, fetch a v2
31697 descriptor unless the same descriptor was added to the cache within
31698 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31701 Changes in version 0.2.1.16-rc - 2009-06-20
31702 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
31703 a bunch of minor bugs.
31706 - Fix an edge case where a malicious exit relay could convince a
31707 controller that the client's DNS question resolves to an internal IP
31708 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31710 o Major performance improvements (on 0.2.0.x):
31711 - Disable and refactor some debugging checks that forced a linear scan
31712 over the whole server-side DNS cache. These accounted for over 50%
31713 of CPU time on a relatively busy exit node's gprof profile. Found
31715 - Disable some debugging checks that appeared in exit node profile
31719 - Update to the "June 3 2009" ip-to-country file.
31720 - Do not have tor-resolve automatically refuse all .onion addresses;
31721 if AutomapHostsOnResolve is set in your torrc, this will work fine.
31723 o Minor bugfixes (on 0.2.0.x):
31724 - Log correct error messages for DNS-related network errors on
31726 - Fix a race condition that could cause crashes or memory corruption
31727 when running as a server with a controller listening for log
31729 - Avoid crashing when we have a policy specified in a DirPolicy or
31730 SocksPolicy or ReachableAddresses option with ports set on it,
31731 and we re-load the policy. May fix bug 996.
31732 - Hidden service clients didn't use a cached service descriptor that
31733 was older than 15 minutes, but wouldn't fetch a new one either,
31734 because there was already one in the cache. Now, fetch a v2
31735 descriptor unless the same descriptor was added to the cache within
31736 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31738 o Minor bugfixes (on 0.2.1.x):
31739 - Don't warn users about low port and hibernation mix when they
31740 provide a *ListenAddress directive to fix that. Bugfix on
31742 - When switching back and forth between bridge mode, do not start
31743 gathering GeoIP data until two hours have passed.
31744 - Do not complain that the user has requested an excluded node as
31745 an exit when the node is not really an exit. This could happen
31746 because the circuit was for testing, or an introduction point.
31750 Changes in version 0.2.1.15-rc - 2009-05-25
31751 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
31752 series. It fixes a major bug on fast exit relays, as well as a variety
31753 of more minor bugs.
31755 o Major bugfixes (on 0.2.0.x):
31756 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31757 that would occur on some exit nodes when DNS failures and timeouts
31758 occurred in certain patterns. Fix for bug 957.
31760 o Minor bugfixes (on 0.2.0.x):
31761 - Actually return -1 in the error case for read_bandwidth_usage().
31762 Harmless bug, since we currently don't care about the return value
31763 anywhere. Bugfix on 0.2.0.9-alpha.
31764 - Provide a more useful log message if bug 977 (related to buffer
31765 freelists) ever reappears, and do not crash right away.
31766 - Fix an assertion failure on 64-bit platforms when we allocated
31767 memory right up to the end of a memarea, then realigned the memory
31768 one step beyond the end. Fixes a possible cause of bug 930.
31769 - Protect the count of open sockets with a mutex, so we can't
31770 corrupt it when two threads are closing or opening sockets at once.
31771 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
31772 - Don't allow a bridge to publish its router descriptor to a
31773 non-bridge directory authority. Fixes part of bug 932.
31774 - When we change to or from being a bridge, reset our counts of
31775 client usage by country. Fixes bug 932.
31776 - Fix a bug that made stream bandwidth get misreported to the
31778 - Stop using malloc_usable_size() to use more area than we had
31779 actually allocated: it was safe, but made valgrind really unhappy.
31780 - Fix a memory leak when v3 directory authorities load their keys
31781 and cert from disk. Bugfix on 0.2.0.1-alpha.
31783 o Minor bugfixes (on 0.2.1.x):
31784 - Fix use of freed memory when deciding to mark a non-addable
31785 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
31788 Changes in version 0.2.1.14-rc - 2009-04-12
31789 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
31790 series. It begins fixing some major performance problems, and also
31791 finally addresses the bug that was causing relays on dynamic IP
31792 addresses to fall out of the directory.
31795 - Clients replace entry guards that were chosen more than a few months
31796 ago. This change should significantly improve client performance,
31797 especially once more people upgrade, since relays that have been
31798 a guard for a long time are currently overloaded.
31800 o Major bugfixes (on 0.2.0):
31801 - Finally fix the bug where dynamic-IP relays disappear when their
31802 IP address changes: directory mirrors were mistakenly telling
31803 them their old address if they asked via begin_dir, so they
31804 never got an accurate answer about their new address, so they
31805 just vanished after a day. For belt-and-suspenders, relays that
31806 don't set Address in their config now avoid using begin_dir for
31807 all direct connections. Should fix bugs 827, 883, and 900.
31808 - Relays were falling out of the networkstatus consensus for
31809 part of a day if they changed their local config but the
31810 authorities discarded their new descriptor as "not sufficiently
31811 different". Now directory authorities accept a descriptor as changed
31812 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
31813 patch by Sebastian.
31814 - Avoid crashing in the presence of certain malformed descriptors.
31815 Found by lark, and by automated fuzzing.
31818 - When generating circuit events with verbose nicknames for
31819 controllers, try harder to look up nicknames for routers on a
31820 circuit. (Previously, we would look in the router descriptors we had
31821 for nicknames, but not in the consensus.) Partial fix for bug 941.
31822 - If the bridge config line doesn't specify a port, assume 443.
31823 This makes bridge lines a bit smaller and easier for users to
31825 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
31826 bytes (aka 20KB/s), to match our documentation. Also update
31827 directory authorities so they always assign the Fast flag to relays
31828 with 20KB/s of capacity. Now people running relays won't suddenly
31829 find themselves not seeing any use, if the network gets faster
31831 - Update to the "April 3 2009" ip-to-country file.
31834 - Avoid trying to print raw memory to the logs when we decide to
31835 give up on downloading a given relay descriptor. Bugfix on
31837 - In tor-resolve, when the Tor client to use is specified by
31838 <hostname>:<port>, actually use the specified port rather than
31839 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
31840 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
31841 - When starting with a cache over a few days old, do not leak
31842 memory for the obsolete router descriptors in it. Bugfix on
31844 - Avoid double-free on list of successfully uploaded hidden
31845 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
31846 - Change memarea_strndup() implementation to work even when
31847 duplicating a string at the end of a page. This bug was
31848 harmless for now, but could have meant crashes later. Fix by
31849 lark. Bugfix on 0.2.1.1-alpha.
31850 - Limit uploaded directory documents to be 16M rather than 500K.
31851 The directory authorities were refusing v3 consensus votes from
31852 other authorities, since the votes are now 504K. Fixes bug 959;
31853 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
31854 - Directory authorities should never send a 503 "busy" response to
31855 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
31859 Changes in version 0.2.1.13-alpha - 2009-03-09
31860 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
31861 cleanups. We're finally getting close to a release candidate.
31864 - Correctly update the list of which countries we exclude as
31865 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
31866 lark. Bugfix on 0.2.1.6-alpha.
31868 o Minor bugfixes (on 0.2.0.x and earlier):
31869 - Automatically detect MacOSX versions earlier than 10.4.0, and
31870 disable kqueue from inside Tor when running with these versions.
31871 We previously did this from the startup script, but that was no
31872 help to people who didn't use the startup script. Resolves bug 863.
31873 - When we had picked an exit node for a connection, but marked it as
31874 "optional", and it turned out we had no onion key for the exit,
31875 stop wanting that exit and try again. This situation may not
31876 be possible now, but will probably become feasible with proposal
31877 158. Spotted by rovv. Fixes another case of bug 752.
31878 - Clients no longer cache certificates for authorities they do not
31879 recognize. Bugfix on 0.2.0.9-alpha.
31880 - When we can't transmit a DNS request due to a network error, retry
31881 it after a while, and eventually transmit a failing response to
31882 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
31883 - If the controller claimed responsibility for a stream, but that
31884 stream never finished making its connection, it would live
31885 forever in circuit_wait state. Now we close it after SocksTimeout
31886 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
31887 - Drop begin cells to a hidden service if they come from the middle
31888 of a circuit. Patch from lark.
31889 - When we erroneously receive two EXTEND cells for the same circuit
31890 ID on the same connection, drop the second. Patch from lark.
31891 - Fix a crash that occurs on exit nodes when a nameserver request
31892 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
31893 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
31895 - Do not assume that a stack-allocated character array will be
31896 64-bit aligned on platforms that demand that uint64_t access is
31897 aligned. Possible fix for bug 604.
31898 - Parse dates and IPv4 addresses in a locale- and libc-independent
31899 manner, to avoid platform-dependent behavior on malformed input.
31900 - Build correctly when configured to build outside the main source
31901 path. Patch from Michael Gold.
31902 - We were already rejecting relay begin cells with destination port
31903 of 0. Now also reject extend cells with destination port or address
31904 of 0. Suggested by lark.
31906 o Minor bugfixes (on 0.2.1.x):
31907 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
31908 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
31909 - If we're an exit node, scrub the IP address to which we are exiting
31910 in the logs. Bugfix on 0.2.1.8-alpha.
31913 - On Linux, use the prctl call to re-enable core dumps when the user
31915 - New controller event NEWCONSENSUS that lists the networkstatus
31916 lines for every recommended relay. Now controllers like Torflow
31917 can keep up-to-date on which relays they should be using.
31918 - Update to the "February 26 2009" ip-to-country file.
31921 Changes in version 0.2.0.34 - 2009-02-08
31922 Tor 0.2.0.34 features several more security-related fixes. You should
31923 upgrade, especially if you run an exit relay (remote crash) or a
31924 directory authority (remote infinite loop), or you're on an older
31925 (pre-XP) or not-recently-patched Windows (remote exploit).
31927 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
31928 have many known flaws, and nobody should be using them. You should
31929 upgrade. If you're using a Linux or BSD and its packages are obsolete,
31930 stop using those packages and upgrade anyway.
31933 - Fix an infinite-loop bug on handling corrupt votes under certain
31934 circumstances. Bugfix on 0.2.0.8-alpha.
31935 - Fix a temporary DoS vulnerability that could be performed by
31936 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31937 - Avoid a potential crash on exit nodes when processing malformed
31938 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
31939 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31940 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31943 - Fix compilation on systems where time_t is a 64-bit integer.
31944 Patch from Matthias Drochner.
31945 - Don't consider expiring already-closed client connections. Fixes
31946 bug 893. Bugfix on 0.0.2pre20.
31949 Changes in version 0.2.1.12-alpha - 2009-02-08
31950 Tor 0.2.1.12-alpha features several more security-related fixes. You
31951 should upgrade, especially if you run an exit relay (remote crash) or
31952 a directory authority (remote infinite loop), or you're on an older
31953 (pre-XP) or not-recently-patched Windows (remote exploit). It also
31954 includes a big pile of minor bugfixes and cleanups.
31957 - Fix an infinite-loop bug on handling corrupt votes under certain
31958 circumstances. Bugfix on 0.2.0.8-alpha.
31959 - Fix a temporary DoS vulnerability that could be performed by
31960 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31961 - Avoid a potential crash on exit nodes when processing malformed
31962 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
31965 - Let controllers actually ask for the "clients_seen" event for
31966 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
31967 reported by Matt Edman.
31968 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
31970 - Fix a bug in address parsing that was preventing bridges or hidden
31971 service targets from being at IPv6 addresses.
31972 - Solve a bug that kept hardware crypto acceleration from getting
31973 enabled when accounting was turned on. Fixes bug 907. Bugfix on
31975 - Remove a bash-ism from configure.in to build properly on non-Linux
31976 platforms. Bugfix on 0.2.1.1-alpha.
31977 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
31978 headers. Bugfix on 0.2.0.10-alpha.
31979 - Don't consider expiring already-closed client connections. Fixes
31980 bug 893. Bugfix on 0.0.2pre20.
31981 - Fix another interesting corner-case of bug 891 spotted by rovv:
31982 Previously, if two hosts had different amounts of clock drift, and
31983 one of them created a new connection with just the wrong timing,
31984 the other might decide to deprecate the new connection erroneously.
31985 Bugfix on 0.1.1.13-alpha.
31986 - Resolve a very rare crash bug that could occur when the user forced
31987 a nameserver reconfiguration during the middle of a nameserver
31988 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
31989 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
31990 Bugfix on 0.2.1.7-alpha.
31991 - If we're using bridges and our network goes away, be more willing
31992 to forgive our bridges and try again when we get an application
31993 request. Bugfix on 0.2.0.x.
31996 - Support platforms where time_t is 64 bits long. (Congratulations,
31997 NetBSD!) Patch from Matthias Drochner.
31998 - Add a 'getinfo status/clients-seen' controller command, in case
31999 controllers want to hear clients_seen events but connect late.
32002 - Disable GCC's strict alias optimization by default, to avoid the
32003 likelihood of its introducing subtle bugs whenever our code violates
32004 the letter of C99's alias rules.
32007 Changes in version 0.2.0.33 - 2009-01-21
32008 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
32009 useful to users. It also finally fixes a bug where a relay or client
32010 that's been off for many days would take a long time to bootstrap.
32012 This update also fixes an important security-related bug reported by
32013 Ilja van Sprundel. You should upgrade. (We'll send out more details
32014 about the bug once people have had some time to upgrade.)
32017 - Fix a heap-corruption bug that may be remotely triggerable on
32018 some platforms. Reported by Ilja van Sprundel.
32021 - When a stream at an exit relay is in state "resolving" or
32022 "connecting" and it receives an "end" relay cell, the exit relay
32023 would silently ignore the end cell and not close the stream. If
32024 the client never closes the circuit, then the exit relay never
32025 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
32026 reported by "wood".
32027 - When sending CREATED cells back for a given circuit, use a 64-bit
32028 connection ID to find the right connection, rather than an addr:port
32029 combination. Now that we can have multiple OR connections between
32030 the same ORs, it is no longer possible to use addr:port to uniquely
32031 identify a connection.
32032 - Bridge relays that had DirPort set to 0 would stop fetching
32033 descriptors shortly after startup, and then briefly resume
32034 after a new bandwidth test and/or after publishing a new bridge
32035 descriptor. Bridge users that try to bootstrap from them would
32036 get a recent networkstatus but would get descriptors from up to
32037 18 hours earlier, meaning most of the descriptors were obsolete
32038 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
32039 - Prevent bridge relays from serving their 'extrainfo' document
32040 to anybody who asks, now that extrainfo docs include potentially
32041 sensitive aggregated client geoip summaries. Bugfix on
32043 - If the cached networkstatus consensus is more than five days old,
32044 discard it rather than trying to use it. In theory it could be
32045 useful because it lists alternate directory mirrors, but in practice
32046 it just means we spend many minutes trying directory mirrors that
32047 are long gone from the network. Also discard router descriptors as
32048 we load them if they are more than five days old, since the onion
32049 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
32052 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
32053 could make gcc generate non-functional binary search code. Bugfix
32055 - Build correctly on platforms without socklen_t.
32056 - Compile without warnings on solaris.
32057 - Avoid potential crash on internal error during signature collection.
32058 Fixes bug 864. Patch from rovv.
32059 - Correct handling of possible malformed authority signing key
32060 certificates with internal signature types. Fixes bug 880.
32061 Bugfix on 0.2.0.3-alpha.
32062 - Fix a hard-to-trigger resource leak when logging credential status.
32064 - When we can't initialize DNS because the network is down, do not
32065 automatically stop Tor from starting. Instead, we retry failed
32066 dns_init() every 10 minutes, and change the exit policy to reject
32067 *:* until one succeeds. Fixes bug 691.
32068 - Use 64 bits instead of 32 bits for connection identifiers used with
32069 the controller protocol, to greatly reduce risk of identifier reuse.
32070 - When we're choosing an exit node for a circuit, and we have
32071 no pending streams, choose a good general exit rather than one that
32072 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32073 - Fix another case of assuming, when a specific exit is requested,
32074 that we know more than the user about what hosts it allows.
32075 Fixes one case of bug 752. Patch from rovv.
32076 - Clip the MaxCircuitDirtiness config option to a minimum of 10
32077 seconds. Warn the user if lower values are given in the
32078 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
32079 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
32080 user if lower values are given in the configuration. Bugfix on
32081 0.1.1.17-rc. Patch by Sebastian.
32082 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
32083 the cache because we already had a v0 descriptor with the same ID.
32084 Bugfix on 0.2.0.18-alpha.
32085 - Fix a race condition when freeing keys shared between main thread
32086 and CPU workers that could result in a memory leak. Bugfix on
32087 0.1.0.1-rc. Fixes bug 889.
32088 - Send a valid END cell back when a client tries to connect to a
32089 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32090 840. Patch from rovv.
32091 - Check which hops rendezvous stream cells are associated with to
32092 prevent possible guess-the-streamid injection attacks from
32093 intermediate hops. Fixes another case of bug 446. Based on patch
32095 - If a broken client asks a non-exit router to connect somewhere,
32096 do not even do the DNS lookup before rejecting the connection.
32097 Fixes another case of bug 619. Patch from rovv.
32098 - When a relay gets a create cell it can't decrypt (e.g. because it's
32099 using the wrong onion key), we were dropping it and letting the
32100 client time out. Now actually answer with a destroy cell. Fixes
32101 bug 904. Bugfix on 0.0.2pre8.
32103 o Minor bugfixes (hidden services):
32104 - Do not throw away existing introduction points on SIGHUP. Bugfix on
32105 0.0.6pre1. Patch by Karsten. Fixes bug 874.
32108 - Report the case where all signatures in a detached set are rejected
32109 differently than the case where there is an error handling the
32111 - When we realize that another process has modified our cached
32112 descriptors, print out a more useful error message rather than
32113 triggering an assertion. Fixes bug 885. Patch from Karsten.
32114 - Implement the 0x20 hack to better resist DNS poisoning: set the
32115 case on outgoing DNS requests randomly, and reject responses that do
32116 not match the case correctly. This logic can be disabled with the
32117 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32118 of servers that do not reliably preserve case in replies. See
32119 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32121 - Check DNS replies for more matching fields to better resist DNS
32123 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32124 compress cells, which are basically all encrypted, compressed, or
32128 Changes in version 0.2.1.11-alpha - 2009-01-20
32129 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
32130 week it will take a long time to bootstrap again" bug. It also fixes
32131 an important security-related bug reported by Ilja van Sprundel. You
32132 should upgrade. (We'll send out more details about the bug once people
32133 have had some time to upgrade.)
32136 - Fix a heap-corruption bug that may be remotely triggerable on
32137 some platforms. Reported by Ilja van Sprundel.
32140 - Discard router descriptors as we load them if they are more than
32141 five days old. Otherwise if Tor is off for a long time and then
32142 starts with cached descriptors, it will try to use the onion
32143 keys in those obsolete descriptors when building circuits. Bugfix
32144 on 0.2.0.x. Fixes bug 887.
32147 - Try to make sure that the version of Libevent we're running with
32148 is binary-compatible with the one we built with. May address bug
32150 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
32151 for bug 905. Bugfix on 0.2.1.7-alpha.
32152 - Add a new --enable-local-appdata configuration switch to change
32153 the default location of the datadir on win32 from APPDATA to
32154 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
32155 entirely. Patch from coderman.
32158 - Make outbound DNS packets respect the OutboundBindAddress setting.
32159 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
32160 - When our circuit fails at the first hop (e.g. we get a destroy
32161 cell back), avoid using that OR connection anymore, and also
32162 tell all the one-hop directory requests waiting for it that they
32163 should fail. Bugfix on 0.2.1.3-alpha.
32164 - In the torify(1) manpage, mention that tsocks will leak your
32168 Changes in version 0.2.1.10-alpha - 2009-01-06
32169 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
32170 would make the bridge relay not so useful if it had DirPort set to 0,
32171 and one that could let an attacker learn a little bit of information
32172 about the bridge's users), and a bug that would cause your Tor relay
32173 to ignore a circuit create request it can't decrypt (rather than reply
32174 with an error). It also fixes a wide variety of other bugs.
32177 - If the cached networkstatus consensus is more than five days old,
32178 discard it rather than trying to use it. In theory it could
32179 be useful because it lists alternate directory mirrors, but in
32180 practice it just means we spend many minutes trying directory
32181 mirrors that are long gone from the network. Helps bug 887 a bit;
32183 - Bridge relays that had DirPort set to 0 would stop fetching
32184 descriptors shortly after startup, and then briefly resume
32185 after a new bandwidth test and/or after publishing a new bridge
32186 descriptor. Bridge users that try to bootstrap from them would
32187 get a recent networkstatus but would get descriptors from up to
32188 18 hours earlier, meaning most of the descriptors were obsolete
32189 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
32190 - Prevent bridge relays from serving their 'extrainfo' document
32191 to anybody who asks, now that extrainfo docs include potentially
32192 sensitive aggregated client geoip summaries. Bugfix on
32196 - New controller event "clients_seen" to report a geoip-based summary
32197 of which countries we've seen clients from recently. Now controllers
32198 like Vidalia can show bridge operators that they're actually making
32200 - Build correctly against versions of OpenSSL 0.9.8 or later built
32201 without support for deprecated functions.
32202 - Update to the "December 19 2008" ip-to-country file.
32204 o Minor bugfixes (on 0.2.0.x):
32205 - Authorities now vote for the Stable flag for any router whose
32206 weighted MTBF is at least 5 days, regardless of the mean MTBF.
32207 - Do not remove routers as too old if we do not have any consensus
32208 document. Bugfix on 0.2.0.7-alpha.
32209 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
32210 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
32211 - When an exit relay resolves a stream address to a local IP address,
32212 do not just keep retrying that same exit relay over and
32213 over. Instead, just close the stream. Addresses bug 872. Bugfix
32214 on 0.2.0.32. Patch from rovv.
32215 - If a hidden service sends us an END cell, do not consider
32216 retrying the connection; just close it. Patch from rovv.
32217 - When we made bridge authorities stop serving bridge descriptors over
32218 unencrypted links, we also broke DirPort reachability testing for
32219 bridges. So bridges with a non-zero DirPort were printing spurious
32220 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
32221 - When a relay gets a create cell it can't decrypt (e.g. because it's
32222 using the wrong onion key), we were dropping it and letting the
32223 client time out. Now actually answer with a destroy cell. Fixes
32224 bug 904. Bugfix on 0.0.2pre8.
32225 - Squeeze 2-5% out of client performance (according to oprofile) by
32226 improving the implementation of some policy-manipulation functions.
32228 o Minor bugfixes (on 0.2.1.x):
32229 - Make get_interface_address() function work properly again; stop
32230 guessing the wrong parts of our address as our address.
32231 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
32232 send on that circuit. Otherwise we might violate the proposal-110
32233 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
32235 - When we're sending non-EXTEND cells to the first hop in a circuit,
32236 for example to use an encrypted directory connection, we don't need
32237 to use RELAY_EARLY cells: the first hop knows what kind of cell
32238 it is, and nobody else can even see the cell type. Conserving
32239 RELAY_EARLY cells makes it easier to cannibalize circuits like
32241 - Stop logging nameserver addresses in reverse order.
32242 - If we are retrying a directory download slowly over and over, do
32243 not automatically give up after the 254th failure. Bugfix on
32245 - Resume reporting accurate "stream end" reasons to the local control
32246 port. They were lost in the changes for Proposal 148. Bugfix on
32249 o Deprecated and removed features:
32250 - The old "tor --version --version" command, which would print out
32251 the subversion "Id" of most of the source files, is now removed. It
32252 turned out to be less useful than we'd expected, and harder to
32255 o Code simplifications and refactoring:
32256 - Change our header file guard macros to be less likely to conflict
32257 with system headers. Adam Langley noticed that we were conflicting
32258 with log.h on Android.
32259 - Tool-assisted documentation cleanup. Nearly every function or
32260 static variable in Tor should have its own documentation now.
32263 Changes in version 0.2.1.9-alpha - 2008-12-25
32264 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
32266 o New directory authorities:
32267 - gabelmoo (the authority run by Karsten Loesing) now has a new
32271 - Never use a connection with a mismatched address to extend a
32272 circuit, unless that connection is canonical. A canonical
32273 connection is one whose address is authenticated by the router's
32274 identity key, either in a NETINFO cell or in a router descriptor.
32275 - Avoid a possible memory corruption bug when receiving hidden service
32276 descriptors. Bugfix on 0.2.1.6-alpha.
32279 - Fix a logic error that would automatically reject all but the first
32280 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
32281 part of bug 813/868. Bug spotted by coderman.
32282 - When a stream at an exit relay is in state "resolving" or
32283 "connecting" and it receives an "end" relay cell, the exit relay
32284 would silently ignore the end cell and not close the stream. If
32285 the client never closes the circuit, then the exit relay never
32286 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
32287 reported by "wood".
32288 - When we can't initialize DNS because the network is down, do not
32289 automatically stop Tor from starting. Instead, retry failed
32290 dns_init() every 10 minutes, and change the exit policy to reject
32291 *:* until one succeeds. Fixes bug 691.
32294 - Give a better error message when an overzealous init script says
32295 "sudo -u username tor --user username". Makes Bug 882 easier for
32297 - When a directory authority gives us a new guess for our IP address,
32298 log which authority we used. Hopefully this will help us debug
32299 the recent complaints about bad IP address guesses.
32300 - Detect svn revision properly when we're using git-svn.
32301 - Try not to open more than one descriptor-downloading connection
32302 to an authority at once. This should reduce load on directory
32303 authorities. Fixes bug 366.
32304 - Add cross-certification to newly generated certificates, so that
32305 a signing key is enough information to look up a certificate.
32306 Partial implementation of proposal 157.
32307 - Start serving certificates by <identity digest, signing key digest>
32308 pairs. Partial implementation of proposal 157.
32309 - Clients now never report any stream end reason except 'MISC'.
32310 Implements proposal 148.
32311 - On platforms with a maximum syslog string length, truncate syslog
32312 messages to that length ourselves, rather than relying on the
32313 system to do it for us.
32314 - Optimize out calls to time(NULL) that occur for every IO operation,
32315 or for every cell. On systems where time() is a slow syscall,
32316 this fix will be slightly helpful.
32317 - Exit servers can now answer resolve requests for ip6.arpa addresses.
32318 - When we download a descriptor that we then immediately (as
32319 a directory authority) reject, do not retry downloading it right
32320 away. Should save some bandwidth on authorities. Fix for bug
32321 888. Patch by Sebastian Hahn.
32322 - When a download gets us zero good descriptors, do not notify
32323 Tor that new directory information has arrived.
32324 - Avoid some nasty corner cases in the logic for marking connections
32325 as too old or obsolete or noncanonical for circuits. Partial
32328 o Minor features (controller):
32329 - New CONSENSUS_ARRIVED event to note when a new consensus has
32330 been fetched and validated.
32331 - When we realize that another process has modified our cached
32332 descriptors file, print out a more useful error message rather
32333 than triggering an assertion. Fixes bug 885. Patch from Karsten.
32334 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
32335 controllers to prevent SIGHUP from reloading the
32336 configuration. Fixes bug 856.
32339 - Resume using the correct "REASON=" stream when telling the
32340 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
32341 - When a canonical connection appears later in our internal list
32342 than a noncanonical one for a given OR ID, always use the
32343 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
32345 - Clip the MaxCircuitDirtiness config option to a minimum of 10
32346 seconds. Warn the user if lower values are given in the
32347 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
32348 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
32349 user if lower values are given in the configuration. Bugfix on
32350 0.1.1.17-rc. Patch by Sebastian.
32351 - Fix a race condition when freeing keys shared between main thread
32352 and CPU workers that could result in a memory leak. Bugfix on
32353 0.1.0.1-rc. Fixes bug 889.
32355 o Minor bugfixes (hidden services):
32356 - Do not throw away existing introduction points on SIGHUP (bugfix on
32357 0.0.6pre1); also, do not stall hidden services because we're
32358 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
32359 by John Brooks. Patch by Karsten. Fixes bug 874.
32360 - Fix a memory leak when we decline to add a v2 rendezvous
32361 descriptor to the cache because we already had a v0 descriptor
32362 with the same ID. Bugfix on 0.2.0.18-alpha.
32364 o Deprecated and removed features:
32365 - RedirectExits has been removed. It was deprecated since
32367 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
32368 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
32369 - Cell pools are now always enabled; --disable-cell-pools is ignored.
32371 o Code simplifications and refactoring:
32372 - Rename the confusing or_is_obsolete field to the more appropriate
32373 is_bad_for_new_circs, and move it to or_connection_t where it
32375 - Move edge-only flags from connection_t to edge_connection_t: not
32376 only is this better coding, but on machines of plausible alignment,
32377 it should save 4-8 bytes per connection_t. "Every little bit helps."
32378 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
32379 for consistency; keep old option working for backward compatibility.
32380 - Simplify the code for finding connections to use for a circuit.
32383 Changes in version 0.2.1.8-alpha - 2008-12-08
32384 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
32385 builds better on unusual platforms like Solaris and old OS X, and
32386 fixes a variety of other issues.
32389 - New DirPortFrontPage option that takes an html file and publishes
32390 it as "/" on the DirPort. Now relay operators can provide a
32391 disclaimer without needing to set up a separate webserver. There's
32392 a sample disclaimer in contrib/tor-exit-notice.html.
32395 - When the client is choosing entry guards, now it selects at most
32396 one guard from a given relay family. Otherwise we could end up with
32397 all of our entry points into the network run by the same operator.
32398 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
32401 - Fix a DOS opportunity during the voting signature collection process
32402 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32403 - Fix a possible segfault when establishing an exit connection. Bugfix
32407 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
32409 - Made Tor a little less aggressive about deleting expired
32410 certificates. Partial fix for bug 854.
32411 - Stop doing unaligned memory access that generated bus errors on
32412 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
32413 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
32414 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
32415 - Make USR2 log-level switch take effect immediately. Bugfix on
32417 - If one win32 nameserver fails to get added, continue adding the
32418 rest, and don't automatically fail.
32419 - Use fcntl() for locking when flock() is not available. Should fix
32420 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
32421 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
32422 could make gcc generate non-functional binary search code. Bugfix
32424 - Build correctly on platforms without socklen_t.
32425 - Avoid potential crash on internal error during signature collection.
32426 Fixes bug 864. Patch from rovv.
32427 - Do not use C's stdio library for writing to log files. This will
32428 improve logging performance by a minute amount, and will stop
32429 leaking fds when our disk is full. Fixes bug 861.
32430 - Stop erroneous use of O_APPEND in cases where we did not in fact
32431 want to re-seek to the end of a file before every last write().
32432 - Correct handling of possible malformed authority signing key
32433 certificates with internal signature types. Fixes bug 880. Bugfix
32435 - Fix a hard-to-trigger resource leak when logging credential status.
32439 - Directory mirrors no longer fetch the v1 directory or
32440 running-routers files. They are obsolete, and nobody asks for them
32441 anymore. This is the first step to making v1 authorities obsolete.
32443 o Minor features (controller):
32444 - Return circuit purposes in response to GETINFO circuit-status. Fixes
32448 Changes in version 0.2.0.32 - 2008-11-20
32449 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
32450 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32451 a smaller security flaw that might allow an attacker to access local
32452 services, further improves hidden service performance, and fixes a
32453 variety of other issues.
32456 - The "User" and "Group" config options did not clear the
32457 supplementary group entries for the Tor process. The "User" option
32458 is now more robust, and we now set the groups to the specified
32459 user's primary group. The "Group" option is now ignored. For more
32460 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32461 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32462 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
32463 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32464 consistently obeyed: if an exit relay refuses a stream because its
32465 exit policy doesn't allow it, we would remember what IP address
32466 the relay said the destination address resolves to, even if it's
32467 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32470 - Fix a DOS opportunity during the voting signature collection process
32471 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32473 o Major bugfixes (hidden services):
32474 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32475 we were failing the whole hidden service request when the v0
32476 descriptor fetch fails, even if the v2 fetch is still pending and
32477 might succeed. Similarly, if the last v2 fetch fails, we were
32478 failing the whole hidden service request even if a v0 fetch is
32479 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32480 - When extending a circuit to a hidden service directory to upload a
32481 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32482 requests failed, because the router descriptor has not been
32483 downloaded yet. In these cases, do not attempt to upload the
32484 rendezvous descriptor, but wait until the router descriptor is
32485 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
32486 descriptor from a hidden service directory for which the router
32487 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
32491 - Fix several infrequent memory leaks spotted by Coverity.
32492 - When testing for libevent functions, set the LDFLAGS variable
32493 correctly. Found by Riastradh.
32494 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32495 bootstrapping with tunneled directory connections. Bugfix on
32496 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32497 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32498 and we know that server B rejects most-but-not all connections to
32499 port 80, we would previously reject the connection. Now, we assume
32500 the user knows what they were asking for. Fixes bug 752. Bugfix
32501 on 0.0.9rc5. Diagnosed by BarkerJr.
32502 - If we overrun our per-second write limits a little, count this as
32503 having used up our write allocation for the second, and choke
32504 outgoing directory writes. Previously, we had only counted this when
32505 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
32506 Bugfix on 0.2.0.x (??).
32507 - Remove the old v2 directory authority 'lefkada' from the default
32508 list. It has been gone for many months.
32509 - Stop doing unaligned memory access that generated bus errors on
32510 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
32511 - Make USR2 log-level switch take effect immediately. Bugfix on
32514 o Minor bugfixes (controller):
32515 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
32516 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
32519 Changes in version 0.2.1.7-alpha - 2008-11-08
32520 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
32521 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32522 a smaller security flaw that might allow an attacker to access local
32523 services, adds better defense against DNS poisoning attacks on exit
32524 relays, further improves hidden service performance, and fixes a
32525 variety of other issues.
32528 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32529 consistently obeyed: if an exit relay refuses a stream because its
32530 exit policy doesn't allow it, we would remember what IP address
32531 the relay said the destination address resolves to, even if it's
32532 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32533 - The "User" and "Group" config options did not clear the
32534 supplementary group entries for the Tor process. The "User" option
32535 is now more robust, and we now set the groups to the specified
32536 user's primary group. The "Group" option is now ignored. For more
32537 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32538 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32539 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
32540 - Do not use or believe expired v3 authority certificates. Patch
32541 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
32544 - Now NodeFamily and MyFamily config options allow spaces in
32545 identity fingerprints, so it's easier to paste them in.
32546 Suggested by Lucky Green.
32547 - Implement the 0x20 hack to better resist DNS poisoning: set the
32548 case on outgoing DNS requests randomly, and reject responses that do
32549 not match the case correctly. This logic can be disabled with the
32550 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32551 of servers that do not reliably preserve case in replies. See
32552 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32554 - Preserve case in replies to DNSPort requests in order to support
32555 the 0x20 hack for resisting DNS poisoning attacks.
32557 o Hidden service performance improvements:
32558 - When the client launches an introduction circuit, retry with a
32559 new circuit after 30 seconds rather than 60 seconds.
32560 - Launch a second client-side introduction circuit in parallel
32561 after a delay of 15 seconds (based on work by Christian Wilms).
32562 - Hidden services start out building five intro circuits rather
32563 than three, and when the first three finish they publish a service
32564 descriptor using those. Now we publish our service descriptor much
32565 faster after restart.
32568 - Minor fix in the warning messages when you're having problems
32569 bootstrapping; also, be more forgiving of bootstrap problems when
32570 we're still making incremental progress on a given bootstrap phase.
32571 - When we're choosing an exit node for a circuit, and we have
32572 no pending streams, choose a good general exit rather than one that
32573 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32574 - Send a valid END cell back when a client tries to connect to a
32575 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32576 840. Patch from rovv.
32577 - If a broken client asks a non-exit router to connect somewhere,
32578 do not even do the DNS lookup before rejecting the connection.
32579 Fixes another case of bug 619. Patch from rovv.
32580 - Fix another case of assuming, when a specific exit is requested,
32581 that we know more than the user about what hosts it allows.
32582 Fixes another case of bug 752. Patch from rovv.
32583 - Check which hops rendezvous stream cells are associated with to
32584 prevent possible guess-the-streamid injection attacks from
32585 intermediate hops. Fixes another case of bug 446. Based on patch
32587 - Avoid using a negative right-shift when comparing 32-bit
32588 addresses. Possible fix for bug 845 and bug 811.
32589 - Make the assert_circuit_ok() function work correctly on circuits that
32590 have already been marked for close.
32591 - Fix read-off-the-end-of-string error in unit tests when decoding
32592 introduction points.
32593 - Fix uninitialized size field for memory area allocation: may improve
32594 memory performance during directory parsing.
32595 - Treat duplicate certificate fetches as failures, so that we do
32596 not try to re-fetch an expired certificate over and over and over.
32597 - Do not say we're fetching a certificate when we'll in fact skip it
32598 because of a pending download.
32601 Changes in version 0.2.1.6-alpha - 2008-09-30
32602 Tor 0.2.1.6-alpha further improves performance and robustness of
32603 hidden services, starts work on supporting per-country relay selection,
32604 and fixes a variety of smaller issues.
32607 - Implement proposal 121: make it possible to build hidden services
32608 that only certain clients are allowed to connect to. This is
32609 enforced at several points, so that unauthorized clients are unable
32610 to send INTRODUCE cells to the service, or even (depending on the
32611 type of authentication) to learn introduction points. This feature
32612 raises the bar for certain kinds of active attacks against hidden
32613 services. Code by Karsten Loesing.
32614 - Relays now store and serve v2 hidden service descriptors by default,
32615 i.e., the new default value for HidServDirectoryV2 is 1. This is
32616 the last step in proposal 114, which aims to make hidden service
32617 lookups more reliable.
32618 - Start work to allow node restrictions to include country codes. The
32619 syntax to exclude nodes in a country with country code XX is
32620 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
32621 refinement to decide what config options should take priority if
32622 you ask to both use a particular node and exclude it.
32623 - Allow ExitNodes list to include IP ranges and country codes, just
32624 like the Exclude*Nodes lists. Patch from Robert Hogan.
32627 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
32628 Tor to fail to start if you had it configured to use a bridge
32629 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
32630 - When extending a circuit to a hidden service directory to upload a
32631 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32632 requests failed, because the router descriptor had not been
32633 downloaded yet. In these cases, we now wait until the router
32634 descriptor is downloaded, and then retry. Likewise, clients
32635 now skip over a hidden service directory if they don't yet have
32636 its router descriptor, rather than futilely requesting it and
32637 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
32639 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32640 we were failing the whole hidden service request when the v0
32641 descriptor fetch fails, even if the v2 fetch is still pending and
32642 might succeed. Similarly, if the last v2 fetch fails, we were
32643 failing the whole hidden service request even if a v0 fetch is
32644 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32645 - DNS replies need to have names matching their requests, but
32646 these names should be in the questions section, not necessarily
32647 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
32650 - Update to the "September 1 2008" ip-to-country file.
32651 - Allow ports 465 and 587 in the default exit policy again. We had
32652 rejected them in 0.1.0.15, because back in 2005 they were commonly
32653 misconfigured and ended up as spam targets. We hear they are better
32654 locked down these days.
32655 - Use a lockfile to make sure that two Tor processes are not
32656 simultaneously running with the same datadir.
32657 - Serve the latest v3 networkstatus consensus via the control
32658 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
32659 - Better logging about stability/reliability calculations on directory
32661 - Drop the requirement to have an open dir port for storing and
32662 serving v2 hidden service descriptors.
32663 - Directory authorities now serve a /tor/dbg-stability.txt URL to
32664 help debug WFU and MTBF calculations.
32665 - Implement most of Proposal 152: allow specialized servers to permit
32666 single-hop circuits, and clients to use those servers to build
32667 single-hop circuits when using a specialized controller. Patch
32668 from Josh Albrecht. Resolves feature request 768.
32669 - Add a -p option to tor-resolve for specifying the SOCKS port: some
32670 people find host:port too confusing.
32671 - Make TrackHostExit mappings expire a while after their last use, not
32672 after their creation. Patch from Robert Hogan.
32673 - Provide circuit purposes along with circuit events to the controller.
32676 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
32678 - Fixed some memory leaks -- some quite frequent, some almost
32679 impossible to trigger -- based on results from Coverity.
32680 - When testing for libevent functions, set the LDFLAGS variable
32681 correctly. Found by Riastradh.
32682 - Fix an assertion bug in parsing policy-related options; possible fix
32684 - Catch and report a few more bootstrapping failure cases when Tor
32685 fails to establish a TCP connection. Cleanup on 0.2.1.x.
32686 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32687 bootstrapping with tunneled directory connections. Bugfix on
32688 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32689 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32690 and we know that server B rejects most-but-not all connections to
32691 port 80, we would previously reject the connection. Now, we assume
32692 the user knows what they were asking for. Fixes bug 752. Bugfix
32693 on 0.0.9rc5. Diagnosed by BarkerJr.
32694 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
32695 service directories if they have no advertised dir port. Bugfix
32697 - If we overrun our per-second write limits a little, count this as
32698 having used up our write allocation for the second, and choke
32699 outgoing directory writes. Previously, we had only counted this when
32700 we had met our limits precisely. Fixes bug 824. Patch by rovv.
32701 Bugfix on 0.2.0.x (??).
32702 - Avoid a "0 divided by 0" calculation when calculating router uptime
32703 at directory authorities. Bugfix on 0.2.0.8-alpha.
32704 - Make DNS resolved controller events into "CLOSED", not
32705 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
32707 - Fix a bug where an unreachable relay would establish enough
32708 reachability testing circuits to do a bandwidth test -- if
32709 we already have a connection to the middle hop of the testing
32710 circuit, then it could establish the last hop by using the existing
32711 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
32712 circuits no longer use entry guards in 0.2.1.3-alpha.
32713 - If we have correct permissions on $datadir, we complain to stdout
32714 and fail to start. But dangerous permissions on
32715 $datadir/cached-status/ would cause us to open a log and complain
32716 there. Now complain to stdout and fail to start in both cases. Fixes
32717 bug 820, reported by seeess.
32718 - Remove the old v2 directory authority 'lefkada' from the default
32719 list. It has been gone for many months.
32721 o Code simplifications and refactoring:
32722 - Revise the connection_new functions so that a more typesafe variant
32723 exists. This will work better with Coverity, and let us find any
32724 actual mistakes we're making here.
32725 - Refactor unit testing logic so that dmalloc can be used sensibly
32726 with unit tests to check for memory leaks.
32727 - Move all hidden-service related fields from connection and circuit
32728 structure to substructures: this way they won't eat so much memory.
32731 Changes in version 0.2.0.31 - 2008-09-03
32732 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
32733 a big bug we're seeing where in rare cases traffic from one Tor stream
32734 gets mixed into another stream, and fixes a variety of smaller issues.
32737 - Make sure that two circuits can never exist on the same connection
32738 with the same circuit ID, even if one is marked for close. This
32739 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
32740 - Relays now reject risky extend cells: if the extend cell includes
32741 a digest of all zeroes, or asks to extend back to the relay that
32742 sent the extend cell, tear down the circuit. Ideas suggested
32744 - If not enough of our entry guards are available so we add a new
32745 one, we might use the new one even if it overlapped with the
32746 current circuit's exit relay (or its family). Anonymity bugfix
32747 pointed out by rovv.
32750 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32751 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32752 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32753 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32754 - Pick size of default geoip filename string correctly on windows.
32755 Fixes bug 806. Bugfix on 0.2.0.30.
32756 - Make the autoconf script accept the obsolete --with-ssl-dir
32757 option as an alias for the actually-working --with-openssl-dir
32758 option. Fix the help documentation to recommend --with-openssl-dir.
32759 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32760 - When using the TransPort option on OpenBSD, and using the User
32761 option to change UID and drop privileges, make sure to open
32762 /dev/pf before dropping privileges. Fixes bug 782. Patch from
32763 Christopher Davis. Bugfix on 0.1.2.1-alpha.
32764 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32765 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32766 on the client side when connecting to a hidden service. Bugfix
32767 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32768 - When closing an application-side connection because its circuit is
32769 getting torn down, generate the stream event correctly. Bugfix on
32770 0.1.2.x. Anonymous patch.
32773 Changes in version 0.2.1.5-alpha - 2008-08-31
32774 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
32775 in a lot of the infrastructure for adding authorization to hidden
32776 services, lays the groundwork for having clients read their load
32777 balancing information out of the networkstatus consensus rather than
32778 the individual router descriptors, addresses two potential anonymity
32779 issues, and fixes a variety of smaller issues.
32782 - Convert many internal address representations to optionally hold
32784 - Generate and accept IPv6 addresses in many protocol elements.
32785 - Make resolver code handle nameservers located at ipv6 addresses.
32786 - Begin implementation of proposal 121 ("Client authorization for
32787 hidden services"): configure hidden services with client
32788 authorization, publish descriptors for them, and configure
32789 authorization data for hidden services at clients. The next
32790 step is to actually access hidden services that perform client
32792 - More progress toward proposal 141: Network status consensus
32793 documents and votes now contain bandwidth information for each
32794 router and a summary of that router's exit policy. Eventually this
32795 will be used by clients so that they do not have to download every
32796 known descriptor before building circuits.
32798 o Major bugfixes (on 0.2.0.x and before):
32799 - When sending CREATED cells back for a given circuit, use a 64-bit
32800 connection ID to find the right connection, rather than an addr:port
32801 combination. Now that we can have multiple OR connections between
32802 the same ORs, it is no longer possible to use addr:port to uniquely
32803 identify a connection.
32804 - Relays now reject risky extend cells: if the extend cell includes
32805 a digest of all zeroes, or asks to extend back to the relay that
32806 sent the extend cell, tear down the circuit. Ideas suggested
32808 - If not enough of our entry guards are available so we add a new
32809 one, we might use the new one even if it overlapped with the
32810 current circuit's exit relay (or its family). Anonymity bugfix
32811 pointed out by rovv.
32814 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32815 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32816 - When using the TransPort option on OpenBSD, and using the User
32817 option to change UID and drop privileges, make sure to open /dev/pf
32818 before dropping privileges. Fixes bug 782. Patch from Christopher
32819 Davis. Bugfix on 0.1.2.1-alpha.
32820 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32821 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32822 - Add a missing safe_str() call for a debug log message.
32823 - Use 64 bits instead of 32 bits for connection identifiers used with
32824 the controller protocol, to greatly reduce risk of identifier reuse.
32825 - Make the autoconf script accept the obsolete --with-ssl-dir
32826 option as an alias for the actually-working --with-openssl-dir
32827 option. Fix the help documentation to recommend --with-openssl-dir.
32828 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32831 - Rate-limit too-many-sockets messages: when they happen, they happen
32832 a lot. Resolves bug 748.
32833 - Resist DNS poisoning a little better by making sure that names in
32834 answer sections match.
32835 - Print the SOCKS5 error message string as well as the error code
32836 when a tor-resolve request fails. Patch from Jacob.
32839 Changes in version 0.2.1.4-alpha - 2008-08-04
32840 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
32843 - The address part of exit policies was not correctly written
32844 to router descriptors. This generated router descriptors that failed
32845 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
32847 - Tor triggered a false assert when extending a circuit to a relay
32848 but we already have a connection open to that relay. Noticed by
32849 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
32852 - Fix a hidden service logging bug: in some edge cases, the router
32853 descriptor of a previously picked introduction point becomes
32854 obsolete and we need to give up on it rather than continually
32855 complaining that it has become obsolete. Observed by xiando. Bugfix
32858 o Removed features:
32859 - Take out the TestVia config option, since it was a workaround for
32860 a bug that was fixed in Tor 0.1.1.21.
32863 Changes in version 0.2.1.3-alpha - 2008-08-03
32864 Tor 0.2.1.3-alpha implements most of the pieces to prevent
32865 infinite-length circuit attacks (see proposal 110); fixes a bug that
32866 might cause exit relays to corrupt streams they send back; allows
32867 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
32868 ExcludeExitNodes config options; and fixes a big pile of bugs.
32870 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
32871 - Send a bootstrap problem "warn" event on the first problem if the
32872 reason is NO_ROUTE (that is, our network is down).
32875 - Implement most of proposal 110: The first K cells to be sent
32876 along a circuit are marked as special "early" cells; only K "early"
32877 cells will be allowed. Once this code is universal, we can block
32878 certain kinds of DOS attack by requiring that EXTEND commands must
32879 be sent using an "early" cell.
32882 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32883 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32884 on the client side when connecting to a hidden service. Bugfix
32885 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32886 - Ensure that two circuits can never exist on the same connection
32887 with the same circuit ID, even if one is marked for close. This
32888 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
32891 - When relays do their initial bandwidth measurement, don't limit
32892 to just our entry guards for the test circuits. Otherwise we tend
32893 to have multiple test circuits going through a single entry guard,
32894 which makes our bandwidth test less accurate. Fixes part of bug 654;
32895 patch contributed by Josh Albrecht.
32896 - Add an ExcludeExitNodes option so users can list a set of nodes
32897 that should be be excluded from the exit node position, but
32898 allowed elsewhere. Implements proposal 151.
32899 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
32900 ExcludeNodes and ExcludeExitNodes lists.
32901 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
32902 be more efficient. Formerly it was quadratic in the number of
32903 servers; now it should be linear. Fixes bug 509.
32904 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
32905 and n_conn_id_digest fields into a separate structure that's
32906 only needed when the circuit has not yet attached to an n_conn.
32909 - Change the contrib/tor.logrotate script so it makes the new
32910 logs as "_tor:_tor" rather than the default, which is generally
32911 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
32912 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32913 warnings (occasionally), but it can also cause the compiler to
32914 eliminate error-checking code. Suggested by Peter Gutmann.
32915 - When a hidden service is giving up on an introduction point candidate
32916 that was not included in the last published rendezvous descriptor,
32917 don't reschedule publication of the next descriptor. Fixes bug 763.
32919 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
32920 HiddenServiceExcludeNodes as obsolete: they never worked properly,
32921 and nobody claims to be using them. Fixes bug 754. Bugfix on
32922 0.1.0.1-rc. Patch from Christian Wilms.
32923 - Fix a small alignment and memory-wasting bug on buffer chunks.
32926 o Minor bugfixes (controller):
32927 - When closing an application-side connection because its circuit
32928 is getting torn down, generate the stream event correctly.
32929 Bugfix on 0.1.2.x. Anonymous patch.
32931 o Removed features:
32932 - Remove all backward-compatibility code to support relays running
32933 versions of Tor so old that they no longer work at all on the
32937 Changes in version 0.2.0.30 - 2008-07-15
32939 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32940 warnings (occasionally), but it can also cause the compiler to
32941 eliminate error-checking code. Suggested by Peter Gutmann.
32944 Changes in version 0.2.0.29-rc - 2008-07-08
32945 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
32946 hidden-service performance bugs, and fixes a bunch of smaller bugs.
32949 - If you have more than one bridge but don't know their keys,
32950 you would only launch a request for the descriptor of the first one
32951 on your list. (Tor considered launching requests for the others, but
32952 found that it already had a connection on the way for $0000...0000
32953 so it didn't open another.) Bugfix on 0.2.0.x.
32954 - If you have more than one bridge but don't know their keys, and the
32955 connection to one of the bridges failed, you would cancel all
32956 pending bridge connections. (After all, they all have the same
32957 digest.) Bugfix on 0.2.0.x.
32958 - When a hidden service was trying to establish an introduction point,
32959 and Tor had built circuits preemptively for such purposes, we
32960 were ignoring all the preemptive circuits and launching a new one
32961 instead. Bugfix on 0.2.0.14-alpha.
32962 - When a hidden service was trying to establish an introduction point,
32963 and Tor *did* manage to reuse one of the preemptively built
32964 circuits, it didn't correctly remember which one it used,
32965 so it asked for another one soon after, until there were no
32966 more preemptive circuits, at which point it launched one from
32967 scratch. Bugfix on 0.0.9.x.
32968 - Make directory servers include the X-Your-Address-Is: http header in
32969 their responses even for begin_dir conns. Now clients who only
32970 ever use begin_dir connections still have a way to learn their IP
32971 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
32974 - Fix a macro/CPP interaction that was confusing some compilers:
32975 some GCCs don't like #if/#endif pairs inside macro arguments.
32977 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
32978 Fixes bug 704; fix from Steven Murdoch.
32979 - When opening /dev/null in finish_daemonize(), do not pass the
32980 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
32981 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
32982 - Correctly detect transparent proxy support on Linux hosts that
32983 require in.h to be included before netfilter_ipv4.h. Patch
32985 - Disallow session resumption attempts during the renegotiation
32986 stage of the v2 handshake protocol. Clients should never be trying
32987 session resumption at this point, but apparently some did, in
32988 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
32989 found by Geoff Goodell.
32992 Changes in version 0.2.1.2-alpha - 2008-06-20
32993 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
32994 make it easier to set up your own private Tor network; fixes several
32995 big bugs with using more than one bridge relay; fixes a big bug with
32996 offering hidden services quickly after Tor starts; and uses a better
32997 API for reporting potential bootstrapping problems to the controller.
33000 - New TestingTorNetwork config option to allow adjustment of
33001 previously constant values that, while reasonable, could slow
33002 bootstrapping. Implements proposal 135. Patch from Karsten.
33005 - If you have more than one bridge but don't know their digests,
33006 you would only learn a request for the descriptor of the first one
33007 on your list. (Tor considered launching requests for the others, but
33008 found that it already had a connection on the way for $0000...0000
33009 so it didn't open another.) Bugfix on 0.2.0.x.
33010 - If you have more than one bridge but don't know their digests,
33011 and the connection to one of the bridges failed, you would cancel
33012 all pending bridge connections. (After all, they all have the
33013 same digest.) Bugfix on 0.2.0.x.
33014 - When establishing a hidden service, introduction points that
33015 originate from cannibalized circuits are completely ignored and not
33016 included in rendezvous service descriptors. This might be another
33017 reason for delay in making a hidden service available. Bugfix
33018 from long ago (0.0.9.x?)
33021 - Allow OpenSSL to use dynamic locks if it wants.
33022 - When building a consensus, do not include routers that are down.
33023 This will cut down 30% to 40% on consensus size. Implements
33025 - In directory authorities' approved-routers files, allow
33026 fingerprints with or without space.
33027 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
33028 controller can query our current bootstrap state in case it attaches
33029 partway through and wants to catch up.
33030 - Send an initial "Starting" bootstrap status event, so we have a
33031 state to start out in.
33034 - Asking for a conditional consensus at .../consensus/<fingerprints>
33035 would crash a dirserver if it did not already have a
33036 consensus. Bugfix on 0.2.1.1-alpha.
33037 - Clean up some macro/CPP interactions: some GCC versions don't like
33038 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
33041 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
33042 - Directory authorities shouldn't complain about bootstrapping
33043 problems just because they do a lot of reachability testing and
33044 some of the connection attempts fail.
33045 - Start sending "count" and "recommendation" key/value pairs in
33046 bootstrap problem status events, so the controller can hear about
33047 problems even before Tor decides they're worth reporting for sure.
33048 - If you're using bridges, generate "bootstrap problem" warnings
33049 as soon as you run out of working bridges, rather than waiting
33050 for ten failures -- which will never happen if you have less than
33052 - If we close our OR connection because there's been a circuit
33053 pending on it for too long, we were telling our bootstrap status
33054 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
33057 Changes in version 0.2.1.1-alpha - 2008-06-13
33058 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
33059 were making the Tor process bloat especially on Linux; makes our TLS
33060 handshake blend in better; sends "bootstrap phase" status events to
33061 the controller, so it can keep the user informed of progress (and
33062 problems) fetching directory information and establishing circuits;
33063 and adds a variety of smaller features.
33066 - More work on making our TLS handshake blend in: modify the list
33067 of ciphers advertised by OpenSSL in client mode to even more
33068 closely resemble a common web browser. We cheat a little so that
33069 we can advertise ciphers that the locally installed OpenSSL doesn't
33071 - Start sending "bootstrap phase" status events to the controller,
33072 so it can keep the user informed of progress fetching directory
33073 information and establishing circuits. Also inform the controller
33074 if we think we're stuck at a particular bootstrap phase. Implements
33076 - Resume using OpenSSL's RAND_poll() for better (and more portable)
33077 cross-platform entropy collection again. We used to use it, then
33078 stopped using it because of a bug that could crash systems that
33079 called RAND_poll when they had a lot of fds open. It looks like the
33080 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
33081 at startup, and to call RAND_poll() when we reseed later only if
33082 we have a non-buggy OpenSSL version.
33085 - When we choose to abandon a new entry guard because we think our
33086 older ones might be better, close any circuits pending on that
33087 new entry guard connection. This fix should make us recover much
33088 faster when our network is down and then comes back. Bugfix on
33089 0.1.2.8-beta; found by lodger.
33091 o Memory fixes and improvements:
33092 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
33093 to avoid unused RAM in buffer chunks and memory pools.
33094 - Speed up parsing and cut down on memory fragmentation by using
33095 stack-style allocations for parsing directory objects. Previously,
33096 this accounted for over 40% of allocations from within Tor's code
33097 on a typical directory cache.
33098 - Use a Bloom filter rather than a digest-based set to track which
33099 descriptors we need to keep around when we're cleaning out old
33100 router descriptors. This speeds up the computation significantly,
33101 and may reduce fragmentation.
33102 - Reduce the default smartlist size from 32 to 16; it turns out that
33103 most smartlists hold around 8-12 elements tops.
33104 - Make dumpstats() log the fullness and size of openssl-internal
33106 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
33107 patch to their OpenSSL, turn it on to save memory on servers. This
33108 patch will (with any luck) get included in a mainline distribution
33110 - Never use OpenSSL compression: it wastes RAM and CPU trying to
33111 compress cells, which are basically all encrypted, compressed,
33115 - Stop reloading the router list from disk for no reason when we
33116 run out of reachable directory mirrors. Once upon a time reloading
33117 it would set the 'is_running' flag back to 1 for them. It hasn't
33118 done that for a long time.
33119 - In very rare situations new hidden service descriptors were
33120 published earlier than 30 seconds after the last change to the
33121 service. (We currently think that a hidden service descriptor
33122 that's been stable for 30 seconds is worth publishing.)
33125 - Allow separate log levels to be configured for different logging
33126 domains. For example, this allows one to log all notices, warnings,
33127 or errors, plus all memory management messages of level debug or
33128 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
33129 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
33130 and stop using a warning that had become unfixably verbose under
33132 - New --hush command-line option similar to --quiet. While --quiet
33133 disables all logging to the console on startup, --hush limits the
33134 output to messages of warning and error severity.
33135 - Servers support a new URL scheme for consensus downloads that
33136 allows the client to specify which authorities are trusted.
33137 The server then only sends the consensus if the client will trust
33138 it. Otherwise a 404 error is sent back. Clients use this
33139 new scheme when the server supports it (meaning it's running
33140 0.2.1.1-alpha or later). Implements proposal 134.
33141 - New configure/torrc options (--enable-geoip-stats,
33142 DirRecordUsageByCountry) to record how many IPs we've served
33143 directory info to in each country code, how many status documents
33144 total we've sent to each country code, and what share of the total
33145 directory requests we should expect to see.
33146 - Use the TLS1 hostname extension to more closely resemble browser
33148 - Lots of new unit tests.
33149 - Add a macro to implement the common pattern of iterating through
33150 two parallel lists in lockstep.
33153 Changes in version 0.2.0.28-rc - 2008-06-13
33154 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
33155 performance bug, and fixes a bunch of smaller bugs.
33158 - Fix a bug where, when we were choosing the 'end stream reason' to
33159 put in our relay end cell that we send to the exit relay, Tor
33160 clients on Windows were sometimes sending the wrong 'reason'. The
33161 anonymity problem is that exit relays may be able to guess whether
33162 the client is running Windows, thus helping partition the anonymity
33163 set. Down the road we should stop sending reasons to exit relays,
33164 or otherwise prevent future versions of this bug.
33167 - While setting up a hidden service, some valid introduction circuits
33168 were overlooked and abandoned. This might be the reason for
33169 the long delay in making a hidden service available. Bugfix on
33173 - Update to the "June 9 2008" ip-to-country file.
33174 - Run 'make test' as part of 'make dist', so we stop releasing so
33175 many development snapshots that fail their unit tests.
33178 - When we're checking if we have enough dir info for each relay
33179 to begin establishing circuits, make sure that we actually have
33180 the descriptor listed in the consensus, not just any descriptor.
33182 - Bridge relays no longer print "xx=0" in their extrainfo document
33183 for every single country code in the geoip db. Bugfix on
33185 - Only warn when we fail to load the geoip file if we were planning to
33186 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
33187 - If we change our MaxAdvertisedBandwidth and then reload torrc,
33188 Tor won't realize it should publish a new relay descriptor. Fixes
33189 bug 688, reported by mfr. Bugfix on 0.1.2.x.
33190 - When we haven't had any application requests lately, don't bother
33191 logging that we have expired a bunch of descriptors. Bugfix
33193 - Make relay cells written on a connection count as non-padding when
33194 tracking how long a connection has been in use. Bugfix on
33195 0.2.0.1-alpha. Spotted by lodger.
33196 - Fix unit tests in 0.2.0.27-rc.
33197 - Fix compile on Windows.
33200 Changes in version 0.2.0.27-rc - 2008-06-03
33201 Tor 0.2.0.27-rc adds a few features we left out of the earlier
33202 release candidates. In particular, we now include an IP-to-country
33203 GeoIP database, so controllers can easily look up what country a
33204 given relay is in, and so bridge relays can give us some sanitized
33205 summaries about which countries are making use of bridges. (See proposal
33206 126-geoip-fetching.txt for details.)
33209 - Include an IP-to-country GeoIP file in the tarball, so bridge
33210 relays can report sanitized summaries of the usage they're seeing.
33213 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
33214 Robert Hogan. Fixes the first part of bug 681.
33215 - Make bridge authorities never serve extrainfo docs.
33216 - Add support to detect Libevent versions in the 1.4.x series
33218 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
33219 - Include a new contrib/tor-exit-notice.html file that exit relay
33220 operators can put on their website to help reduce abuse queries.
33223 - When tunneling an encrypted directory connection, and its first
33224 circuit fails, do not leave it unattached and ask the controller
33225 to deal. Fixes the second part of bug 681.
33226 - Make bridge authorities correctly expire old extrainfo documents
33230 Changes in version 0.2.0.26-rc - 2008-05-13
33231 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
33232 in Debian's OpenSSL packages. All users running any 0.2.0.x version
33233 should upgrade, whether they're running Debian or not.
33235 o Major security fixes:
33236 - Use new V3 directory authority keys on the tor26, gabelmoo, and
33237 moria1 V3 directory authorities. The old keys were generated with
33238 a vulnerable version of Debian's OpenSSL package, and must be
33239 considered compromised. Other authorities' keys were not generated
33240 with an affected version of OpenSSL.
33243 - List authority signatures as "unrecognized" based on DirServer
33244 lines, not on cert cache. Bugfix on 0.2.0.x.
33247 - Add a new V3AuthUseLegacyKey option to make it easier for
33248 authorities to change their identity keys if they have to.
33251 Changes in version 0.2.0.25-rc - 2008-04-23
33252 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
33255 - Remember to initialize threading before initializing logging.
33256 Otherwise, many BSD-family implementations will crash hard on
33257 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
33260 - Authorities correctly free policies on bad servers on
33261 exit. Fixes bug 672. Bugfix on 0.2.0.x.
33264 Changes in version 0.2.0.24-rc - 2008-04-22
33265 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
33266 v3 directory authority, makes relays with dynamic IP addresses and no
33267 DirPort notice more quickly when their IP address changes, fixes a few
33268 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
33270 o New directory authorities:
33271 - Take lefkada out of the list of v3 directory authorities, since
33272 it has been down for months.
33273 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
33277 - Detect address changes more quickly on non-directory mirror
33278 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
33280 o Minor features (security):
33281 - Reject requests for reverse-dns lookup of names that are in
33282 a private address space. Patch from lodger.
33283 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
33286 o Minor bugfixes (crashes):
33287 - Avoid a rare assert that can trigger when Tor doesn't have much
33288 directory information yet and it tries to fetch a v2 hidden
33289 service descriptor. Fixes bug 651, reported by nwf.
33290 - Initialize log mutex before initializing dmalloc. Otherwise,
33291 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
33292 - Use recursive pthread mutexes in order to avoid deadlock when
33293 logging debug-level messages to a controller. Bug spotted by nwf,
33294 bugfix on 0.2.0.16-alpha.
33296 o Minor bugfixes (resource management):
33297 - Keep address policies from leaking memory: start their refcount
33298 at 1, not 2. Bugfix on 0.2.0.16-alpha.
33299 - Free authority certificates on exit, so they don't look like memory
33300 leaks. Bugfix on 0.2.0.19-alpha.
33301 - Free static hashtables for policy maps and for TLS connections on
33302 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
33303 - Avoid allocating extra space when computing consensuses on 64-bit
33304 platforms. Bug spotted by aakova.
33306 o Minor bugfixes (misc):
33307 - Do not read the configuration file when we've only been told to
33308 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
33309 based on patch from Sebastian Hahn.
33310 - Exit relays that are used as a client can now reach themselves
33311 using the .exit notation, rather than just launching an infinite
33312 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
33313 - When attempting to open a logfile fails, tell us why.
33314 - Fix a dumb bug that was preventing us from knowing that we should
33315 preemptively build circuits to handle expected directory requests.
33316 Fixes bug 660. Bugfix on 0.1.2.x.
33317 - Warn less verbosely about clock skew from netinfo cells from
33318 untrusted sources. Fixes bug 663.
33319 - Make controller stream events for DNS requests more consistent,
33320 by adding "new stream" events for DNS requests, and removing
33321 spurious "stream closed" events" for cached reverse resolves.
33322 Patch from mwenge. Fixes bug 646.
33323 - Correctly notify one-hop connections when a circuit build has
33324 failed. Possible fix for bug 669. Found by lodger.
33327 Changes in version 0.2.0.23-rc - 2008-03-24
33328 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
33329 makes bootstrapping faster if the first directory mirror you contact
33330 is down. The bundles also include the new Vidalia 0.1.2 release.
33333 - When a tunneled directory request is made to a directory server
33334 that's down, notice after 30 seconds rather than 120 seconds. Also,
33335 fail any begindir streams that are pending on it, so they can
33336 retry elsewhere. This was causing multi-minute delays on bootstrap.
33339 Changes in version 0.2.0.22-rc - 2008-03-18
33340 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
33341 enables encrypted directory connections by default for non-relays, fixes
33342 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
33343 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
33346 - Enable encrypted directory connections by default for non-relays,
33347 so censor tools that block Tor directory connections based on their
33348 plaintext patterns will no longer work. This means Tor works in
33349 certain censored countries by default again.
33352 - Make sure servers always request certificates from clients during
33353 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
33354 - Do not enter a CPU-eating loop when a connection is closed in
33355 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
33356 diagnosed by lodger; bugfix on 0.2.0.20-rc.
33357 - Fix assertion failure that could occur when a blocked circuit
33358 became unblocked, and it had pending client DNS requests. Bugfix
33359 on 0.2.0.1-alpha. Fixes bug 632.
33361 o Minor bugfixes (on 0.1.2.x):
33362 - Generate "STATUS_SERVER" events rather than misspelled
33363 "STATUS_SEVER" events. Caught by mwenge.
33364 - When counting the number of bytes written on a TLS connection,
33365 look at the BIO actually used for writing to the network, not
33366 at the BIO used (sometimes) to buffer data for the network.
33367 Looking at different BIOs could result in write counts on the
33368 order of ULONG_MAX. Fixes bug 614.
33369 - On Windows, correctly detect errors when listing the contents of
33370 a directory. Fix from lodger.
33372 o Minor bugfixes (on 0.2.0.x):
33373 - Downgrade "sslv3 alert handshake failure" message to INFO.
33374 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
33375 left BandwidthRate and BandwidthBurst at the default, we would be
33376 silently limited by those defaults. Now raise them to match the
33377 RelayBandwidth* values.
33378 - Fix the SVK version detection logic to work correctly on a branch.
33379 - Make --enable-openbsd-malloc work correctly on Linux with alpha
33380 CPUs. Fixes bug 625.
33381 - Logging functions now check that the passed severity is sane.
33382 - Use proper log levels in the testsuite call of
33383 get_interface_address6().
33384 - When using a nonstandard malloc, do not use the platform values for
33385 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
33386 - Make the openbsd malloc code use 8k pages on alpha CPUs and
33388 - Detect mismatched page sizes when using --enable-openbsd-malloc.
33389 - Avoid double-marked-for-close warning when certain kinds of invalid
33390 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
33391 for bug 617. Bugfix on 0.2.0.1-alpha.
33392 - Make sure that the "NULL-means-reject *:*" convention is followed by
33393 all the policy manipulation functions, avoiding some possible crash
33394 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
33395 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
33396 actually works, and doesn't warn about every single reverse lookup.
33397 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
33400 - Only log guard node status when guard node status has changed.
33401 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
33402 make "INFO" 75% less verbose.
33405 Changes in version 0.2.0.21-rc - 2008-03-02
33406 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
33407 makes Tor work well with Vidalia again, fixes a rare assert bug,
33408 and fixes a pair of more minor bugs. The bundles also include Vidalia
33409 0.1.0 and Torbutton 1.1.16.
33412 - The control port should declare that it requires password auth
33413 when HashedControlSessionPassword is set too. Patch from Matt Edman;
33414 bugfix on 0.2.0.20-rc. Fixes bug 615.
33415 - Downgrade assert in connection_buckets_decrement() to a log message.
33416 This may help us solve bug 614, and in any case will make its
33417 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
33418 - We were sometimes miscounting the number of bytes read from the
33419 network, causing our rate limiting to not be followed exactly.
33420 Bugfix on 0.2.0.16-alpha. Reported by lodger.
33423 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
33424 OpenSSL versions should have been working fine. Diagnosis and patch
33425 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
33426 Bugfix on 0.2.0.20-rc.
33429 Changes in version 0.2.0.20-rc - 2008-02-24
33430 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
33431 makes more progress towards normalizing Tor's TLS handshake, makes
33432 hidden services work better again, helps relays bootstrap if they don't
33433 know their IP address, adds optional support for linking in openbsd's
33434 allocator or tcmalloc, allows really fast relays to scale past 15000
33435 sockets, and fixes a bunch of minor bugs reported by Veracode.
33438 - Enable the revised TLS handshake based on the one designed by
33439 Steven Murdoch in proposal 124, as revised in proposal 130. It
33440 includes version negotiation for OR connections as described in
33441 proposal 105. The new handshake is meant to be harder for censors
33442 to fingerprint, and it adds the ability to detect certain kinds of
33443 man-in-the-middle traffic analysis attacks. The version negotiation
33444 feature will allow us to improve Tor's link protocol more safely
33446 - Choose which bridge to use proportional to its advertised bandwidth,
33447 rather than uniformly at random. This should speed up Tor for
33448 bridge users. Also do this for people who set StrictEntryNodes.
33449 - When a TrackHostExits-chosen exit fails too many times in a row,
33450 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
33453 - Resolved problems with (re-)fetching hidden service descriptors.
33454 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
33455 and 0.2.0.19-alpha.
33456 - If we only ever used Tor for hidden service lookups or posts, we
33457 would stop building circuits and start refusing connections after
33458 24 hours, since we falsely believed that Tor was dormant. Reported
33459 by nwf; bugfix on 0.1.2.x.
33460 - Servers that don't know their own IP address should go to the
33461 authorities for their first directory fetch, even if their DirPort
33462 is off or if they don't know they're reachable yet. This will help
33463 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
33464 - When counting the number of open sockets, count not only the number
33465 of sockets we have received from the socket() call, but also
33466 the number we've gotten from accept() and socketpair(). This bug
33467 made us fail to count all sockets that we were using for incoming
33468 connections. Bugfix on 0.2.0.x.
33469 - Fix code used to find strings within buffers, when those strings
33470 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
33471 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
33472 - Add a new __HashedControlSessionPassword option for controllers
33473 to use for one-off session password hashes that shouldn't get
33474 saved to disk by SAVECONF --- Vidalia users were accumulating a
33475 pile of HashedControlPassword lines in their torrc files, one for
33476 each time they had restarted Tor and then clicked Save. Make Tor
33477 automatically convert "HashedControlPassword" to this new option but
33478 only when it's given on the command line. Partial fix for bug 586.
33480 o Minor features (performance):
33481 - Tune parameters for cell pool allocation to minimize amount of
33483 - Add OpenBSD malloc code from phk as an optional malloc
33484 replacement on Linux: some glibc libraries do very poorly
33485 with Tor's memory allocation patterns. Pass
33486 --enable-openbsd-malloc to get the replacement malloc code.
33487 - Add a --with-tcmalloc option to the configure script to link
33488 against tcmalloc (if present). Does not yet search for
33489 non-system include paths.
33490 - Stop imposing an arbitrary maximum on the number of file descriptors
33491 used for busy servers. Bug reported by Olaf Selke; patch from
33494 o Minor features (other):
33495 - When SafeLogging is disabled, log addresses along with all TLS
33497 - When building with --enable-gcc-warnings, check for whether Apple's
33498 warning "-Wshorten-64-to-32" is available.
33499 - Add a --passphrase-fd argument to the tor-gencert command for
33502 o Minor bugfixes (memory leaks and code problems):
33503 - We were leaking a file descriptor if Tor started with a zero-length
33504 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
33505 - Detect size overflow in zlib code. Reported by Justin Ferguson and
33507 - We were comparing the raw BridgePassword entry with a base64'ed
33508 version of it, when handling a "/tor/networkstatus-bridges"
33509 directory request. Now compare correctly. Noticed by Veracode.
33510 - Recover from bad tracked-since value in MTBF-history file.
33511 Should fix bug 537.
33512 - Alter the code that tries to recover from unhandled write
33513 errors, to not try to flush onto a socket that's given us
33514 unhandled errors. Bugfix on 0.1.2.x.
33515 - Make Unix controlsockets work correctly on OpenBSD. Patch from
33516 tup. Bugfix on 0.2.0.3-alpha.
33518 o Minor bugfixes (other):
33519 - If we have an extra-info document for our server, always make
33520 it available on the control port, even if we haven't gotten
33521 a copy of it from an authority yet. Patch from mwenge.
33522 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
33523 - Directory mirrors no longer include a guess at the client's IP
33524 address if the connection appears to be coming from the same /24
33525 network; it was producing too many wrong guesses.
33526 - Make the new hidden service code respect the SafeLogging setting.
33527 Bugfix on 0.2.0.x. Patch from Karsten.
33528 - When starting as an authority, do not overwrite all certificates
33529 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
33530 - If we're trying to flush the last bytes on a connection (for
33531 example, when answering a directory request), reset the
33532 time-to-give-up timeout every time we manage to write something
33533 on the socket. Bugfix on 0.1.2.x.
33534 - Change the behavior of "getinfo status/good-server-descriptor"
33535 so it doesn't return failure when any authority disappears.
33536 - Even though the man page said that "TrackHostExits ." should
33537 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
33538 - Report TLS "zero return" case as a "clean close" and "IO error"
33539 as a "close". Stop calling closes "unexpected closes": existing
33540 Tors don't use SSL_close(), so having a connection close without
33541 the TLS shutdown handshake is hardly unexpected.
33542 - Send NAMESERVER_STATUS messages for a single failed nameserver
33545 o Code simplifications and refactoring:
33546 - Remove the tor_strpartition function: its logic was confused,
33547 and it was only used for one thing that could be implemented far
33551 Changes in version 0.2.0.19-alpha - 2008-02-09
33552 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
33553 handshake, makes path selection for relays more secure and IP address
33554 guessing more robust, and generally fixes a lot of bugs in preparation
33555 for calling the 0.2.0 branch stable.
33558 - Do not include recognizeable strings in the commonname part of
33559 Tor's x509 certificates.
33562 - If we're a relay, avoid picking ourselves as an introduction point,
33563 a rendezvous point, or as the final hop for internal circuits. Bug
33564 reported by taranis and lodger. Bugfix on 0.1.2.x.
33565 - Patch from "Andrew S. Lists" to catch when we contact a directory
33566 mirror at IP address X and he says we look like we're coming from
33567 IP address X. Bugfix on 0.1.2.x.
33569 o Minor features (security):
33570 - Be more paranoid about overwriting sensitive memory on free(),
33571 as a defensive programming tactic to ensure forward secrecy.
33573 o Minor features (directory authority):
33574 - Actually validate the options passed to AuthDirReject,
33575 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
33576 - Reject router descriptors with out-of-range bandwidthcapacity or
33577 bandwidthburst values.
33579 o Minor features (controller):
33580 - Reject controller commands over 1MB in length. This keeps rogue
33581 processes from running us out of memory.
33583 o Minor features (misc):
33584 - Give more descriptive well-formedness errors for out-of-range
33585 hidden service descriptor/protocol versions.
33586 - Make memory debugging information describe more about history
33587 of cell allocation, so we can help reduce our memory use.
33589 o Deprecated features (controller):
33590 - The status/version/num-versioning and status/version/num-concurring
33591 GETINFO options are no longer useful in the v3 directory protocol:
33592 treat them as deprecated, and warn when they're used.
33595 - When our consensus networkstatus has been expired for a while, stop
33596 being willing to build circuits using it. Fixes bug 401. Bugfix
33598 - Directory caches now fetch certificates from all authorities
33599 listed in a networkstatus consensus, even when they do not
33600 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
33601 - When connecting to a bridge without specifying its key, insert
33602 the connection into the identity-to-connection map as soon as
33603 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
33604 - Detect versions of OS X where malloc_good_size() is present in the
33605 library but never actually declared. Resolves bug 587. Bugfix
33607 - Stop incorrectly truncating zlib responses to directory authority
33608 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
33609 - Stop recommending that every server operator send mail to tor-ops.
33610 Resolves bug 597. Bugfix on 0.1.2.x.
33611 - Don't trigger an assert if we start a directory authority with a
33612 private IP address (like 127.0.0.1).
33613 - Avoid possible failures when generating a directory with routers
33614 with over-long versions strings, or too many flags set. Bugfix
33616 - If an attempt to launch a DNS resolve request over the control
33617 port fails because we have overrun the limit on the number of
33618 connections, tell the controller that the request has failed.
33619 - Avoid using too little bandwidth when our clock skips a few
33620 seconds. Bugfix on 0.1.2.x.
33621 - Fix shell error when warning about missing packages in configure
33622 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
33623 - Do not become confused when receiving a spurious VERSIONS-like
33624 cell from a confused v1 client. Bugfix on 0.2.0.x.
33625 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
33626 introduction points for a hidden service have failed. Patch from
33627 Karsten Loesing. Bugfix on 0.2.0.x.
33629 o Code simplifications and refactoring:
33630 - Remove some needless generality from cpuworker code, for improved
33632 - Stop overloading the circuit_t.onionskin field for both "onionskin
33633 from a CREATE cell that we are waiting for a cpuworker to be
33634 assigned" and "onionskin from an EXTEND cell that we are going to
33635 send to an OR as soon as we are connected". Might help with bug 600.
33636 - Add an in-place version of aes_crypt() so that we can avoid doing a
33637 needless memcpy() call on each cell payload.
33640 Changes in version 0.2.0.18-alpha - 2008-01-25
33641 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
33642 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
33643 that can warn or reject connections to ports generally associated with
33644 vulnerable-plaintext protocols.
33646 o New directory authorities:
33647 - Set up dannenberg (run by CCC) as the sixth v3 directory
33651 - Fix a major memory leak when attempting to use the v2 TLS
33652 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
33653 - We accidentally enabled the under-development v2 TLS handshake
33654 code, which was causing log entries like "TLS error while
33655 renegotiating handshake". Disable it again. Resolves bug 590.
33656 - We were computing the wrong Content-Length: header for directory
33657 responses that need to be compressed on the fly, causing clients
33658 asking for those items to always fail. Bugfix on 0.2.0.x; partially
33662 - Avoid going directly to the directory authorities even if you're a
33663 relay, if you haven't found yourself reachable yet or if you've
33664 decided not to advertise your dirport yet. Addresses bug 556.
33665 - If we've gone 12 hours since our last bandwidth check, and we
33666 estimate we have less than 50KB bandwidth capacity but we could
33667 handle more, do another bandwidth test.
33668 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
33669 Tor can warn and/or refuse connections to ports commonly used with
33670 vulnerable-plaintext protocols. Currently we warn on ports 23,
33671 109, 110, and 143, but we don't reject any.
33674 - When we setconf ClientOnly to 1, close any current OR and Dir
33675 listeners. Reported by mwenge.
33676 - When we get a consensus that's been signed by more people than
33677 we expect, don't log about it; it's not a big deal. Reported
33681 - Don't answer "/tor/networkstatus-bridges" directory requests if
33682 the request isn't encrypted.
33683 - Make "ClientOnly 1" config option disable directory ports too.
33684 - Patches from Karsten Loesing to make v2 hidden services more
33685 robust: work even when there aren't enough HSDir relays available;
33686 retry when a v2 rend desc fetch fails; but don't retry if we
33687 already have a usable v0 rend desc.
33690 Changes in version 0.2.0.17-alpha - 2008-01-17
33691 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
33694 - Make the tor-gencert man page get included correctly in the tarball.
33697 Changes in version 0.2.0.16-alpha - 2008-01-17
33698 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
33699 Loesing, and generally cleans up a lot of features and minor bugs.
33701 o New directory authorities:
33702 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
33705 o Major performance improvements:
33706 - Switch our old ring buffer implementation for one more like that
33707 used by free Unix kernels. The wasted space in a buffer with 1mb
33708 of data will now be more like 8k than 1mb. The new implementation
33709 also avoids realloc();realloc(); patterns that can contribute to
33710 memory fragmentation.
33713 - Configuration files now accept C-style strings as values. This
33714 helps encode characters not allowed in the current configuration
33715 file format, such as newline or #. Addresses bug 557.
33716 - Although we fixed bug 539 (where servers would send HTTP status 503
33717 responses _and_ send a body too), there are still servers out
33718 there that haven't upgraded. Therefore, make clients parse such
33719 bodies when they receive them.
33720 - When we're not serving v2 directory information, there is no reason
33721 to actually keep any around. Remove the obsolete files and directory
33722 on startup if they are very old and we aren't going to serve them.
33724 o Minor performance improvements:
33725 - Reference-count and share copies of address policy entries; only 5%
33726 of them were actually distinct.
33727 - Never walk through the list of logs if we know that no log is
33728 interested in a given message.
33731 - When an authority has not signed a consensus, do not try to
33732 download a nonexistent "certificate with key 00000000". Bugfix
33733 on 0.2.0.x. Fixes bug 569.
33734 - Fix a rare assert error when we're closing one of our threads:
33735 use a mutex to protect the list of logs, so we never write to the
33736 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
33737 bug 575, which is kind of the revenge of bug 222.
33738 - Patch from Karsten Loesing to complain less at both the client
33739 and the relay when a relay used to have the HSDir flag but doesn't
33740 anymore, and we try to upload a hidden service descriptor.
33741 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
33743 - Do not try to download missing certificates until we have tried
33744 to check our fallback consensus. Fixes bug 583.
33745 - Make bridges round reported GeoIP stats info up to the nearest
33746 estimate, not down. Now we can distinguish between "0 people from
33747 this country" and "1 person from this country".
33748 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
33749 - Avoid possible segfault if key generation fails in
33750 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
33751 - Avoid segfault in the case where a badly behaved v2 versioning
33752 directory sends a signed networkstatus with missing client-versions.
33754 - Avoid segfaults on certain complex invocations of
33755 router_get_by_hexdigest(). Bugfix on 0.1.2.
33756 - Correct bad index on array access in parse_http_time(). Bugfix
33758 - Fix possible bug in vote generation when server versions are present
33759 but client versions are not.
33760 - Fix rare bug on REDIRECTSTREAM control command when called with no
33761 port set: it could erroneously report an error when none had
33763 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
33764 compressing large objects and find ourselves with more than 4k
33765 left over. Bugfix on 0.2.0.
33766 - Fix a small memory leak when setting up a hidden service.
33767 - Fix a few memory leaks that could in theory happen under bizarre
33769 - Fix an assert if we post a general-purpose descriptor via the
33770 control port but that descriptor isn't mentioned in our current
33771 network consensus. Bug reported by Jon McLachlan; bugfix on
33774 o Minor features (controller):
33775 - Get NS events working again. Patch from tup.
33776 - The GETCONF command now escapes and quotes configuration values
33777 that don't otherwise fit into the torrc file.
33778 - The SETCONF command now handles quoted values correctly.
33780 o Minor features (directory authorities):
33781 - New configuration options to override default maximum number of
33782 servers allowed on a single IP address. This is important for
33783 running a test network on a single host.
33784 - Actually implement the -s option to tor-gencert.
33785 - Add a manual page for tor-gencert.
33787 o Minor features (bridges):
33788 - Bridge authorities no longer serve bridge descriptors over
33789 unencrypted connections.
33791 o Minor features (other):
33792 - Add hidden services and DNSPorts to the list of things that make
33793 Tor accept that it has running ports. Change starting Tor with no
33794 ports from a fatal error to a warning; we might change it back if
33795 this turns out to confuse anybody. Fixes bug 579.
33798 Changes in version 0.1.2.19 - 2008-01-17
33799 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
33800 exit policy a little bit more conservative so it's safer to run an
33801 exit relay on a home system, and fixes a variety of smaller issues.
33804 - Exit policies now reject connections that are addressed to a
33805 relay's public (external) IP address too, unless
33806 ExitPolicyRejectPrivate is turned off. We do this because too
33807 many relays are running nearby to services that trust them based
33808 on network address.
33811 - When the clock jumps forward a lot, do not allow the bandwidth
33812 buckets to become negative. Fixes bug 544.
33813 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33814 on every successful resolve. Reported by Mike Perry.
33815 - Purge old entries from the "rephist" database and the hidden
33816 service descriptor database even when DirPort is zero.
33817 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33818 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33819 crashing or mis-answering these requests.
33820 - When we decide to send a 503 response to a request for servers, do
33821 not then also send the server descriptors: this defeats the whole
33822 purpose. Fixes bug 539.
33825 - Changing the ExitPolicyRejectPrivate setting should cause us to
33826 rebuild our server descriptor.
33827 - Fix handling of hex nicknames when answering controller requests for
33828 networkstatus by name, or when deciding whether to warn about
33829 unknown routers in a config option. (Patch from mwenge.)
33830 - Fix a couple of hard-to-trigger autoconf problems that could result
33831 in really weird results on platforms whose sys/types.h files define
33832 nonstandard integer types.
33833 - Don't try to create the datadir when running --verify-config or
33834 --hash-password. Resolves bug 540.
33835 - If we were having problems getting a particular descriptor from the
33836 directory caches, and then we learned about a new descriptor for
33837 that router, we weren't resetting our failure count. Reported
33839 - Although we fixed bug 539 (where servers would send HTTP status 503
33840 responses _and_ send a body too), there are still servers out there
33841 that haven't upgraded. Therefore, make clients parse such bodies
33842 when they receive them.
33843 - Run correctly on systems where rlim_t is larger than unsigned long.
33844 This includes some 64-bit systems.
33845 - Run correctly on platforms (like some versions of OS X 10.5) where
33846 the real limit for number of open files is OPEN_FILES, not rlim_max
33847 from getrlimit(RLIMIT_NOFILES).
33848 - Avoid a spurious free on base64 failure.
33849 - Avoid segfaults on certain complex invocations of
33850 router_get_by_hexdigest().
33851 - Fix rare bug on REDIRECTSTREAM control command when called with no
33852 port set: it could erroneously report an error when none had
33856 Changes in version 0.2.0.15-alpha - 2007-12-25
33857 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
33858 features added in 0.2.0.13-alpha.
33861 - Fix several remotely triggerable asserts based on DirPort requests
33862 for a v2 or v3 networkstatus object before we were prepared. This
33863 was particularly bad for 0.2.0.13 and later bridge relays, who
33864 would never have a v2 networkstatus and would thus always crash
33865 when used. Bugfixes on 0.2.0.x.
33866 - Estimate the v3 networkstatus size more accurately, rather than
33867 estimating it at zero bytes and giving it artificially high priority
33868 compared to other directory requests. Bugfix on 0.2.0.x.
33871 - Fix configure.in logic for cross-compilation.
33872 - When we load a bridge descriptor from the cache, and it was
33873 previously unreachable, mark it as retriable so we won't just
33874 ignore it. Also, try fetching a new copy immediately. Bugfixes
33876 - The bridge GeoIP stats were counting other relays, for example
33877 self-reachability and authority-reachability tests.
33880 - Support compilation to target iPhone; patch from cjacker huang.
33881 To build for iPhone, pass the --enable-iphone option to configure.
33884 Changes in version 0.2.0.14-alpha - 2007-12-23
33886 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
33887 without a datadirectory from a previous Tor install. Reported
33889 - Fix a crash when we fetch a descriptor that turns out to be
33890 unexpected (it used to be in our networkstatus when we started
33891 fetching it, but it isn't in our current networkstatus), and we
33892 aren't using bridges. Bugfix on 0.2.0.x.
33893 - Fix a crash when accessing hidden services: it would work the first
33894 time you use a given introduction point for your service, but
33895 on subsequent requests we'd be using garbage memory. Fixed by
33896 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
33897 - Fix a crash when we load a bridge descriptor from disk but we don't
33898 currently have a Bridge line for it in our torrc. Bugfix on
33902 - If bridge authorities set BridgePassword, they will serve a
33903 snapshot of known bridge routerstatuses from their DirPort to
33904 anybody who knows that password. Unset by default.
33907 - Make the unit tests build again.
33908 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
33909 - Make PublishServerDescriptor default to 1, so the default doesn't
33910 have to change as we invent new directory protocol versions.
33911 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
33912 be included unless sys/time.h is already included. Fixes
33913 bug 553. Bugfix on 0.2.0.x.
33914 - If we receive a general-purpose descriptor and then receive an
33915 identical bridge-purpose descriptor soon after, don't discard
33916 the next one as a duplicate.
33919 - If BridgeRelay is set to 1, then the default for
33920 PublishServerDescriptor is now "bridge" rather than "v2,v3".
33921 - If the user sets RelayBandwidthRate but doesn't set
33922 RelayBandwidthBurst, then make them equal rather than erroring out.
33925 Changes in version 0.2.0.13-alpha - 2007-12-21
33926 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
33927 Goodell, fixes many more bugs, and adds a lot of infrastructure for
33930 o New directory authorities:
33931 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
33935 - Only update guard status (usable / not usable) once we have
33936 enough directory information. This was causing us to always pick
33937 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
33938 causing us to discard all our guards on startup if we hadn't been
33939 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
33940 - Purge old entries from the "rephist" database and the hidden
33941 service descriptor databases even when DirPort is zero. Bugfix
33943 - We were ignoring our RelayBandwidthRate for the first 30 seconds
33944 after opening a circuit -- even a relayed circuit. Bugfix on
33946 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33947 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33948 crashing or mis-answering these types of requests.
33949 - Relays were publishing their server descriptor to v1 and v2
33950 directory authorities, but they didn't try publishing to v3-only
33951 authorities. Fix this; and also stop publishing to v1 authorities.
33953 - When we were reading router descriptors from cache, we were ignoring
33954 the annotations -- so for example we were reading in bridge-purpose
33955 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
33956 - When we decided to send a 503 response to a request for servers, we
33957 were then also sending the server descriptors: this defeats the
33958 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
33961 - Bridge relays now behave like clients with respect to time
33962 intervals for downloading new consensus documents -- otherwise they
33963 stand out. Bridge users now wait until the end of the interval,
33964 so their bridge relay will be sure to have a new consensus document.
33965 - Three new config options (AlternateDirAuthority,
33966 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
33967 user selectively replace the default directory authorities by type,
33968 rather than the all-or-nothing replacement that DirServer offers.
33969 - Tor can now be configured to read a GeoIP file from disk in one
33970 of two formats. This can be used by controllers to map IP addresses
33971 to countries. Eventually, it may support exit-by-country.
33972 - When possible, bridge relays remember which countries users
33973 are coming from, and report aggregate information in their
33974 extra-info documents, so that the bridge authorities can learn
33975 where Tor is blocked.
33976 - Bridge directory authorities now do reachability testing on the
33977 bridges they know. They provide router status summaries to the
33978 controller via "getinfo ns/purpose/bridge", and also dump summaries
33979 to a file periodically.
33980 - Stop fetching directory info so aggressively if your DirPort is
33981 on but your ORPort is off; stop fetching v2 dir info entirely.
33982 You can override these choices with the new FetchDirInfoEarly
33986 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
33987 consensus documents when there are too many relays at a single
33988 IP address. Now clear it in v2 network status documents too, and
33989 also clear it in routerinfo_t when the relay is no longer listed
33990 in the relevant networkstatus document.
33991 - Don't crash if we get an unexpected value for the
33992 PublishServerDescriptor config option. Reported by Matt Edman;
33993 bugfix on 0.2.0.9-alpha.
33994 - Our new v2 hidden service descriptor format allows descriptors
33995 that have no introduction points. But Tor crashed when we tried
33996 to build a descriptor with no intro points (and it would have
33997 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
33998 by Karsten Loesing.
33999 - Fix building with dmalloc 5.5.2 with glibc.
34000 - Reject uploaded descriptors and extrainfo documents if they're
34001 huge. Otherwise we'll cache them all over the network and it'll
34002 clog everything up. Reported by Aljosha Judmayer.
34003 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
34004 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
34005 - When the DANGEROUS_VERSION controller status event told us we're
34006 running an obsolete version, it used the string "OLD" to describe
34007 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
34008 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
34009 - If we can't expand our list of entry guards (e.g. because we're
34010 using bridges or we have StrictEntryNodes set), don't mark relays
34011 down when they fail a directory request. Otherwise we're too quick
34012 to mark all our entry points down. Bugfix on 0.1.2.x.
34013 - Fix handling of hex nicknames when answering controller requests for
34014 networkstatus by name, or when deciding whether to warn about unknown
34015 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
34016 - Fix a couple of hard-to-trigger autoconf problems that could result
34017 in really weird results on platforms whose sys/types.h files define
34018 nonstandard integer types. Bugfix on 0.1.2.x.
34019 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
34020 - Don't crash on name lookup when we have no current consensus. Fixes
34021 bug 538; bugfix on 0.2.0.x.
34022 - Only Tors that want to mirror the v2 directory info should
34023 create the "cached-status" directory in their datadir. (All Tors
34024 used to create it.) Bugfix on 0.2.0.9-alpha.
34025 - Directory authorities should only automatically download Extra Info
34026 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
34029 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
34030 consumers. (We already do this on HUP.)
34031 - Authorities and caches fetch the v2 networkstatus documents
34032 less often, now that v3 is encouraged.
34033 - Add a new config option BridgeRelay that specifies you want to
34034 be a bridge relay. Right now the only difference is that it makes
34035 you answer begin_dir requests, and it makes you cache dir info,
34036 even if your DirPort isn't on.
34037 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
34038 ask about source, timestamp of arrival, purpose, etc. We need
34039 something like this to help Vidalia not do GeoIP lookups on bridge
34041 - Allow multiple HashedControlPassword config lines, to support
34042 multiple controller passwords.
34043 - Authorities now decide whether they're authoritative for a given
34044 router based on the router's purpose.
34045 - New config options AuthDirBadDir and AuthDirListBadDirs for
34046 authorities to mark certain relays as "bad directories" in the
34047 networkstatus documents. Also supports the "!baddir" directive in
34048 the approved-routers file.
34051 Changes in version 0.2.0.12-alpha - 2007-11-16
34052 This twelfth development snapshot fixes some more build problems as
34053 well as a few minor bugs.
34056 - Make it build on OpenBSD again. Patch from tup.
34057 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
34058 package-building for Red Hat, OS X, etc.
34060 o Minor bugfixes (on 0.1.2.x):
34061 - Changing the ExitPolicyRejectPrivate setting should cause us to
34062 rebuild our server descriptor.
34064 o Minor bugfixes (on 0.2.0.x):
34065 - When we're lacking a consensus, don't try to perform rendezvous
34066 operations. Reported by Karsten Loesing.
34067 - Fix a small memory leak whenever we decide against using a
34068 newly picked entry guard. Reported by Mike Perry.
34069 - When authorities detected more than two relays running on the same
34070 IP address, they were clearing all the status flags but forgetting
34071 to clear the "hsdir" flag. So clients were being told that a
34072 given relay was the right choice for a v2 hsdir lookup, yet they
34073 never had its descriptor because it was marked as 'not running'
34075 - If we're trying to fetch a bridge descriptor and there's no way
34076 the bridge authority could help us (for example, we don't know
34077 a digest, or there is no bridge authority), don't be so eager to
34078 fall back to asking the bridge authority.
34079 - If we're using bridges or have strictentrynodes set, and our
34080 chosen exit is in the same family as all our bridges/entry guards,
34081 then be flexible about families.
34084 - When we negotiate a v2 link-layer connection (not yet implemented),
34085 accept RELAY_EARLY cells and turn them into RELAY cells if we've
34086 negotiated a v1 connection for their next step. Initial code for
34090 Changes in version 0.2.0.11-alpha - 2007-11-12
34091 This eleventh development snapshot fixes some build problems with
34092 the previous snapshot. It also includes a more secure-by-default exit
34093 policy for relays, fixes an enormous memory leak for exit relays, and
34094 fixes another bug where servers were falling out of the directory list.
34097 - Exit policies now reject connections that are addressed to a
34098 relay's public (external) IP address too, unless
34099 ExitPolicyRejectPrivate is turned off. We do this because too
34100 many relays are running nearby to services that trust them based
34101 on network address. Bugfix on 0.1.2.x.
34104 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
34105 on every successful resolve. Reported by Mike Perry; bugfix
34107 - On authorities, never downgrade to old router descriptors simply
34108 because they're listed in the consensus. This created a catch-22
34109 where we wouldn't list a new descriptor because there was an
34110 old one in the consensus, and we couldn't get the new one in the
34111 consensus because we wouldn't list it. Possible fix for bug 548.
34112 Also, this might cause bug 543 to appear on authorities; if so,
34113 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
34115 o Packaging fixes on 0.2.0.10-alpha:
34116 - We were including instructions about what to do with the
34117 src/config/fallback-consensus file, but we weren't actually
34118 including it in the tarball. Disable all of that for now.
34121 - Allow people to say PreferTunnelledDirConns rather than
34122 PreferTunneledDirConns, for those alternate-spellers out there.
34125 - Don't reevaluate all the information from our consensus document
34126 just because we've downloaded a v2 networkstatus that we intend
34127 to cache. Fixes bug 545; bugfix on 0.2.0.x.
34130 Changes in version 0.2.0.10-alpha - 2007-11-10
34131 This tenth development snapshot adds a third v3 directory authority
34132 run by Mike Perry, adds most of Karsten Loesing's new hidden service
34133 descriptor format, fixes a bad crash bug and new bridge bugs introduced
34134 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
34135 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
34136 addresses many more minor issues.
34138 o New directory authorities:
34139 - Set up ides (run by Mike Perry) as the third v3 directory authority.
34142 - Allow tunnelled directory connections to ask for an encrypted
34143 "begin_dir" connection or an anonymized "uses a full Tor circuit"
34144 connection independently. Now we can make anonymized begin_dir
34145 connections for (e.g.) more secure hidden service posting and
34147 - More progress on proposal 114: code from Karsten Loesing to
34148 implement new hidden service descriptor format.
34149 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
34150 accommodate the growing number of servers that use the default
34151 and are reaching it.
34152 - Directory authorities use a new formula for selecting which nodes
34153 to advertise as Guards: they must be in the top 7/8 in terms of
34154 how long we have known about them, and above the median of those
34155 nodes in terms of weighted fractional uptime.
34156 - Make "not enough dir info yet" warnings describe *why* Tor feels
34157 it doesn't have enough directory info yet.
34160 - Stop servers from crashing if they set a Family option (or
34161 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
34163 - Make bridge users work again -- the move to v3 directories in
34164 0.2.0.9-alpha had introduced a number of bugs that made bridges
34165 no longer work for clients.
34166 - When the clock jumps forward a lot, do not allow the bandwidth
34167 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
34169 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
34170 - When the consensus lists a router descriptor that we previously were
34171 mirroring, but that we considered non-canonical, reload the
34172 descriptor as canonical. This fixes bug 543 where Tor servers
34173 would start complaining after a few days that they don't have
34174 enough directory information to build a circuit.
34175 - Consider replacing the current consensus when certificates arrive
34176 that make the pending consensus valid. Previously, we were only
34177 considering replacement when the new certs _didn't_ help.
34178 - Fix an assert error on startup if we didn't already have the
34179 consensus and certs cached in our datadirectory: we were caching
34180 the consensus in consensus_waiting_for_certs but then free'ing it
34182 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
34183 Request) if we need more v3 certs but we've already got pending
34184 requests for all of them.
34185 - Correctly back off from failing certificate downloads. Fixes
34187 - Authorities don't vote on the Running flag if they have been running
34188 for less than 30 minutes themselves. Fixes bug 547, where a newly
34189 started authority would vote that everyone was down.
34191 o New requirements:
34192 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
34193 it, it had no AES, and it hasn't seen any security patches since
34197 - Clients now hold circuitless TLS connections open for 1.5 times
34198 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
34199 rebuild a new circuit over them within that timeframe. Previously,
34200 they held them open only for KeepalivePeriod (5 minutes).
34201 - Use "If-Modified-Since" to avoid retrieving consensus
34202 networkstatuses that we already have.
34203 - When we have no consensus, check FallbackNetworkstatusFile (defaults
34204 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
34205 we start knowing some directory caches.
34206 - When we receive a consensus from the future, warn about skew.
34207 - Improve skew reporting: try to give the user a better log message
34208 about how skewed they are, and how much this matters.
34209 - When we have a certificate for an authority, believe that
34210 certificate's claims about the authority's IP address.
34211 - New --quiet command-line option to suppress the default console log.
34212 Good in combination with --hash-password.
34213 - Authorities send back an X-Descriptor-Not-New header in response to
34214 an accepted-but-discarded descriptor upload. Partially implements
34216 - Make the log message for "tls error. breaking." more useful.
34217 - Better log messages about certificate downloads, to attempt to
34218 track down the second incarnation of bug 546.
34220 o Minor features (bridges):
34221 - If bridge users set UpdateBridgesFromAuthority, but the digest
34222 they ask for is a 404 from the bridge authority, they now fall
34223 back to trying the bridge directly.
34224 - Bridges now use begin_dir to publish their server descriptor to
34225 the bridge authority, even when they haven't set TunnelDirConns.
34227 o Minor features (controller):
34228 - When reporting clock skew, and we know that the clock is _at least
34229 as skewed_ as some value, but we don't know the actual value,
34230 report the value as a "minimum skew."
34233 - Update linux-tor-prio.sh script to allow QoS based on the uid of
34234 the Tor process. Patch from Marco Bonetti with tweaks from Mike
34238 - Refuse to start if both ORPort and UseBridges are set. Bugfix
34239 on 0.2.0.x, suggested by Matt Edman.
34240 - Don't stop fetching descriptors when FetchUselessDescriptors is
34241 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
34242 reported by tup and ioerror.
34243 - Better log message on vote from unknown authority.
34244 - Don't log "Launching 0 request for 0 router" message.
34246 o Minor bugfixes (memory leaks):
34247 - Stop leaking memory every time we parse a v3 certificate. Bugfix
34249 - Stop leaking memory every time we load a v3 certificate. Bugfix
34250 on 0.2.0.1-alpha. Fixes bug 536.
34251 - Stop leaking a cached networkstatus on exit. Bugfix on
34253 - Stop leaking voter information every time we free a consensus.
34254 Bugfix on 0.2.0.3-alpha.
34255 - Stop leaking signed data every time we check a voter signature.
34256 Bugfix on 0.2.0.3-alpha.
34257 - Stop leaking a signature every time we fail to parse a consensus or
34258 a vote. Bugfix on 0.2.0.3-alpha.
34259 - Stop leaking v2_download_status_map on shutdown. Bugfix on
34261 - Stop leaking conn->nickname every time we make a connection to a
34262 Tor relay without knowing its expected identity digest (e.g. when
34263 using bridges). Bugfix on 0.2.0.3-alpha.
34265 - Minor bugfixes (portability):
34266 - Run correctly on platforms where rlim_t is larger than unsigned
34267 long, and/or where the real limit for number of open files is
34268 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
34269 particular, these may be needed for OS X 10.5.
34272 Changes in version 0.1.2.18 - 2007-10-28
34273 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
34274 hidden service introduction that were causing huge delays, and a big
34275 bug that was causing some servers to disappear from the network status
34276 lists for a few hours each day.
34278 o Major bugfixes (crashes):
34279 - If a connection is shut down abruptly because of something that
34280 happened inside connection_flushed_some(), do not call
34281 connection_finished_flushing(). Should fix bug 451:
34282 "connection_stop_writing: Assertion conn->write_event failed"
34283 Bugfix on 0.1.2.7-alpha.
34284 - Fix possible segfaults in functions called from
34285 rend_process_relay_cell().
34287 o Major bugfixes (hidden services):
34288 - Hidden services were choosing introduction points uniquely by
34289 hexdigest, but when constructing the hidden service descriptor
34290 they merely wrote the (potentially ambiguous) nickname.
34291 - Clients now use the v2 intro format for hidden service
34292 connections: they specify their chosen rendezvous point by identity
34293 digest rather than by (potentially ambiguous) nickname. These
34294 changes could speed up hidden service connections dramatically.
34296 o Major bugfixes (other):
34297 - Stop publishing a new server descriptor just because we get a
34298 HUP signal. This led (in a roundabout way) to some servers getting
34299 dropped from the networkstatus lists for a few hours each day.
34300 - When looking for a circuit to cannibalize, consider family as well
34301 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34302 circuit cannibalization).
34303 - When a router wasn't listed in a new networkstatus, we were leaving
34304 the flags for that router alone -- meaning it remained Named,
34305 Running, etc -- even though absence from the networkstatus means
34306 that it shouldn't be considered to exist at all anymore. Now we
34307 clear all the flags for routers that fall out of the networkstatus
34308 consensus. Fixes bug 529.
34311 - Don't try to access (or alter) the state file when running
34312 --list-fingerprint or --verify-config or --hash-password. Resolves
34314 - When generating information telling us how to extend to a given
34315 router, do not try to include the nickname if it is
34316 absent. Resolves bug 467.
34317 - Fix a user-triggerable segfault in expand_filename(). (There isn't
34318 a way to trigger this remotely.)
34319 - When sending a status event to the controller telling it that an
34320 OR address is reachable, set the port correctly. (Previously we
34321 were reporting the dir port.)
34322 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34323 command. Bugfix on 0.1.2.17.
34324 - When loading bandwidth history, do not believe any information in
34325 the future. Fixes bug 434.
34326 - When loading entry guard information, do not believe any information
34328 - When we have our clock set far in the future and generate an
34329 onion key, then re-set our clock to be correct, we should not stop
34330 the onion key from getting rotated.
34331 - On some platforms, accept() can return a broken address. Detect
34332 this more quietly, and deal accordingly. Fixes bug 483.
34333 - It's not actually an error to find a non-pending entry in the DNS
34334 cache when canceling a pending resolve. Don't log unless stuff
34335 is fishy. Resolves bug 463.
34336 - Don't reset trusted dir server list when we set a configuration
34337 option. Patch from Robert Hogan.
34338 - Don't try to create the datadir when running --verify-config or
34339 --hash-password. Resolves bug 540.
34342 Changes in version 0.2.0.9-alpha - 2007-10-24
34343 This ninth development snapshot switches clients to the new v3 directory
34344 system; allows servers to be listed in the network status even when they
34345 have the same nickname as a registered server; and fixes many other
34346 bugs including a big one that was causing some servers to disappear
34347 from the network status lists for a few hours each day.
34349 o Major features (directory system):
34350 - Clients now download v3 consensus networkstatus documents instead
34351 of v2 networkstatus documents. Clients and caches now base their
34352 opinions about routers on these consensus documents. Clients only
34353 download router descriptors listed in the consensus.
34354 - Authorities now list servers who have the same nickname as
34355 a different named server, but list them with a new flag,
34356 "Unnamed". Now we can list servers that happen to pick the same
34357 nickname as a server that registered two years ago and then
34358 disappeared. Partially implements proposal 122.
34359 - If the consensus lists a router as "Unnamed", the name is assigned
34360 to a different router: do not identify the router by that name.
34361 Partially implements proposal 122.
34362 - Authorities can now come to a consensus on which method to use to
34363 compute the consensus. This gives us forward compatibility.
34366 - Stop publishing a new server descriptor just because we HUP or
34367 when we find our DirPort to be reachable but won't actually publish
34368 it. New descriptors without any real changes are dropped by the
34369 authorities, and can screw up our "publish every 18 hours" schedule.
34371 - When a router wasn't listed in a new networkstatus, we were leaving
34372 the flags for that router alone -- meaning it remained Named,
34373 Running, etc -- even though absence from the networkstatus means
34374 that it shouldn't be considered to exist at all anymore. Now we
34375 clear all the flags for routers that fall out of the networkstatus
34376 consensus. Fixes bug 529; bugfix on 0.1.2.x.
34377 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
34378 extrainfo documents and then discard them immediately for not
34379 matching the latest router. Bugfix on 0.2.0.1-alpha.
34381 o Minor features (v3 directory protocol):
34382 - Allow tor-gencert to generate a new certificate without replacing
34384 - Allow certificates to include an address.
34385 - When we change our directory-cache settings, reschedule all voting
34386 and download operations.
34387 - Reattempt certificate downloads immediately on failure, as long as
34388 we haven't failed a threshold number of times yet.
34389 - Delay retrying consensus downloads while we're downloading
34390 certificates to verify the one we just got. Also, count getting a
34391 consensus that we already have (or one that isn't valid) as a failure,
34392 and count failing to get the certificates after 20 minutes as a
34394 - Build circuits and download descriptors even if our consensus is a
34395 little expired. (This feature will go away once authorities are
34398 o Minor features (router descriptor cache):
34399 - If we find a cached-routers file that's been sitting around for more
34400 than 28 days unmodified, then most likely it's a leftover from
34401 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
34403 - When we (as a cache) download a descriptor because it was listed
34404 in a consensus, remember when the consensus was supposed to expire,
34405 and don't expire the descriptor until then.
34407 o Minor features (performance):
34408 - Call routerlist_remove_old_routers() much less often. This should
34409 speed startup, especially on directory caches.
34410 - Don't try to launch new descriptor downloads quite so often when we
34411 already have enough directory information to build circuits.
34412 - Base64 decoding was actually showing up on our profile when parsing
34413 the initial descriptor file; switch to an in-process all-at-once
34414 implementation that's about 3.5x times faster than calling out to
34417 o Minor features (compilation):
34418 - Detect non-ASCII platforms (if any still exist) and refuse to
34419 build there: some of our code assumes that 'A' is 65 and so on.
34421 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
34422 - Make the "next period" votes into "current period" votes immediately
34423 after publishing the consensus; avoid a heisenbug that made them
34424 stick around indefinitely.
34425 - When we discard a vote as a duplicate, do not report this as
34427 - Treat missing v3 keys or certificates as an error when running as a
34428 v3 directory authority.
34429 - When we're configured to be a v3 authority, but we're only listed
34430 as a non-v3 authority in our DirServer line for ourself, correct
34432 - If an authority doesn't have a qualified hostname, just put
34433 its address in the vote. This fixes the problem where we referred to
34434 "moria on moria:9031."
34435 - Distinguish between detached signatures for the wrong period, and
34436 detached signatures for a divergent vote.
34437 - Fix a small memory leak when computing a consensus.
34438 - When there's no consensus, we were forming a vote every 30
34439 minutes, but writing the "valid-after" line in our vote based
34440 on our configured V3AuthVotingInterval: so unless the intervals
34441 matched up, we immediately rejected our own vote because it didn't
34442 start at the voting interval that caused us to construct a vote.
34444 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
34445 - Delete unverified-consensus when the real consensus is set.
34446 - Consider retrying a consensus networkstatus fetch immediately
34447 after one fails: don't wait 60 seconds to notice.
34448 - When fetching a consensus as a cache, wait until a newer consensus
34449 should exist before trying to replace the current one.
34450 - Use a more forgiving schedule for retrying failed consensus
34451 downloads than for other types.
34453 o Minor bugfixes (other directory issues):
34454 - Correct the implementation of "download votes by digest." Bugfix on
34456 - Authorities no longer send back "400 you're unreachable please fix
34457 it" errors to Tor servers that aren't online all the time. We're
34458 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
34460 o Minor bugfixes (controller):
34461 - Don't reset trusted dir server list when we set a configuration
34462 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
34463 - Respond to INT and TERM SIGNAL commands before we execute the
34464 signal, in case the signal shuts us down. We had a patch in
34465 0.1.2.1-alpha that tried to do this by queueing the response on
34466 the connection's buffer before shutting down, but that really
34467 isn't the same thing at all. Bug located by Matt Edman.
34469 o Minor bugfixes (misc):
34470 - Correctly check for bad options to the "PublishServerDescriptor"
34471 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
34472 - Stop leaking memory on failing case of base32_decode, and make
34473 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
34474 - Don't try to download extrainfo documents when we're trying to
34475 fetch enough directory info to build a circuit: having enough
34476 info should get priority. Bugfix on 0.2.0.x.
34477 - Don't complain that "your server has not managed to confirm that its
34478 ports are reachable" if we haven't been able to build any circuits
34479 yet. Bug found by spending four hours without a v3 consensus. Bugfix
34481 - Detect the reason for failing to mmap a descriptor file we just
34482 wrote, and give a more useful log message. Fixes bug 533. Bugfix
34485 o Code simplifications and refactoring:
34486 - Remove support for the old bw_accounting file: we've been storing
34487 bandwidth accounting information in the state file since
34488 0.1.2.5-alpha. This may result in bandwidth accounting errors
34489 if you try to upgrade from 0.1.1.x or earlier, or if you try to
34490 downgrade to 0.1.1.x or earlier.
34491 - New convenience code to locate a file within the DataDirectory.
34492 - Move non-authority functionality out of dirvote.c.
34493 - Refactor the arguments for router_pick_{directory_|trusteddir}server
34494 so that they all take the same named flags.
34497 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
34498 Unix users an easy way to script their Tor process (e.g. by
34499 adjusting bandwidth based on the time of the day).
34502 Changes in version 0.2.0.8-alpha - 2007-10-12
34503 This eighth development snapshot fixes a crash bug that's been bothering
34504 us since February 2007, lets bridge authorities store a list of bridge
34505 descriptors they've seen, gets v3 directory voting closer to working,
34506 starts caching v3 directory consensus documents on directory mirrors,
34507 and fixes a variety of smaller issues including some minor memory leaks.
34509 o Major features (router descriptor cache):
34510 - Store routers in a file called cached-descriptors instead of in
34511 cached-routers. Initialize cached-descriptors from cached-routers
34512 if the old format is around. The new format allows us to store
34513 annotations along with descriptors.
34514 - Use annotations to record the time we received each descriptor, its
34515 source, and its purpose.
34516 - Disable the SETROUTERPURPOSE controller command: it is now
34518 - Controllers should now specify cache=no or cache=yes when using
34519 the +POSTDESCRIPTOR command.
34520 - Bridge authorities now write bridge descriptors to disk, meaning
34521 we can export them to other programs and begin distributing them
34524 o Major features (directory authorities):
34525 - When a v3 authority is missing votes or signatures, it now tries
34527 - Directory authorities track weighted fractional uptime as well as
34528 weighted mean-time-between failures. WFU is suitable for deciding
34529 whether a node is "usually up", while MTBF is suitable for deciding
34530 whether a node is "likely to stay up." We need both, because
34531 "usually up" is a good requirement for guards, while "likely to
34532 stay up" is a good requirement for long-lived connections.
34534 o Major features (v3 directory system):
34535 - Caches now download v3 network status documents as needed,
34536 and download the descriptors listed in them.
34537 - All hosts now attempt to download and keep fresh v3 authority
34538 certificates, and re-attempt after failures.
34539 - More internal-consistency checks for vote parsing.
34541 o Major bugfixes (crashes):
34542 - If a connection is shut down abruptly because of something that
34543 happened inside connection_flushed_some(), do not call
34544 connection_finished_flushing(). Should fix bug 451. Bugfix on
34547 o Major bugfixes (performance):
34548 - Fix really bad O(n^2) performance when parsing a long list of
34549 routers: Instead of searching the entire list for an "extra-info "
34550 string which usually wasn't there, once for every routerinfo
34551 we read, just scan lines forward until we find one we like.
34553 - When we add data to a write buffer in response to the data on that
34554 write buffer getting low because of a flush, do not consider the
34555 newly added data as a candidate for immediate flushing, but rather
34556 make it wait until the next round of writing. Otherwise, we flush
34557 and refill recursively, and a single greedy TLS connection can
34558 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
34560 o Minor features (v3 authority system):
34561 - Add more ways for tools to download the votes that lead to the
34563 - Send a 503 when low on bandwidth and a vote, consensus, or
34564 certificate is requested.
34565 - If-modified-since is now implemented properly for all kinds of
34566 certificate requests.
34568 o Minor bugfixes (network statuses):
34569 - Tweak the implementation of proposal 109 slightly: allow at most
34570 two Tor servers on the same IP address, except if it's the location
34571 of a directory authority, in which case allow five. Bugfix on
34574 o Minor bugfixes (controller):
34575 - When sending a status event to the controller telling it that an
34576 OR address is reachable, set the port correctly. (Previously we
34577 were reporting the dir port.) Bugfix on 0.1.2.x.
34579 o Minor bugfixes (v3 directory system):
34580 - Fix logic to look up a cert by its signing key digest. Bugfix on
34582 - Only change the reply to a vote to "OK" if it's not already
34583 set. This gets rid of annoying "400 OK" log messages, which may
34584 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
34585 - When we get a valid consensus, recompute the voting schedule.
34586 - Base the valid-after time of a vote on the consensus voting
34587 schedule, not on our preferred schedule.
34588 - Make the return values and messages from signature uploads and
34589 downloads more sensible.
34590 - Fix a memory leak when serving votes and consensus documents, and
34591 another when serving certificates.
34593 o Minor bugfixes (performance):
34594 - Use a slightly simpler string hashing algorithm (copying Python's
34595 instead of Java's) and optimize our digest hashing algorithm to take
34596 advantage of 64-bit platforms and to remove some possibly-costly
34598 - Fix a minor memory leak whenever we parse guards from our state
34599 file. Bugfix on 0.2.0.7-alpha.
34600 - Fix a minor memory leak whenever we write out a file. Bugfix on
34602 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34603 command. Bugfix on 0.2.0.5-alpha.
34605 o Minor bugfixes (portability):
34606 - On some platforms, accept() can return a broken address. Detect
34607 this more quietly, and deal accordingly. Fixes bug 483.
34608 - Stop calling tor_strlower() on uninitialized memory in some cases.
34609 Bugfix in 0.2.0.7-alpha.
34611 o Minor bugfixes (usability):
34612 - Treat some 403 responses from directory servers as INFO rather than
34613 WARN-severity events.
34614 - It's not actually an error to find a non-pending entry in the DNS
34615 cache when canceling a pending resolve. Don't log unless stuff is
34616 fishy. Resolves bug 463.
34618 o Minor bugfixes (anonymity):
34619 - Never report that we've used more bandwidth than we're willing to
34620 relay: it leaks how much non-relay traffic we're using. Resolves
34622 - When looking for a circuit to cannibalize, consider family as well
34623 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34624 circuit cannibalization).
34626 o Code simplifications and refactoring:
34627 - Make a bunch of functions static. Remove some dead code.
34628 - Pull out about a third of the really big routerlist.c; put it in a
34629 new module, networkstatus.c.
34630 - Merge the extra fields in local_routerstatus_t back into
34631 routerstatus_t: we used to need one routerstatus_t for each
34632 authority's opinion, plus a local_routerstatus_t for the locally
34633 computed consensus opinion. To save space, we put the locally
34634 modified fields into local_routerstatus_t, and only the common
34635 stuff into routerstatus_t. But once v3 directories are in use,
34636 clients and caches will no longer need to hold authority opinions;
34637 thus, the rationale for keeping the types separate is now gone.
34638 - Make the code used to reschedule and reattempt downloads more
34640 - Turn all 'Are we a directory server/mirror?' logic into a call to
34642 - Remove the code to generate the oldest (v1) directory format.
34643 The code has been disabled since 0.2.0.5-alpha.
34646 Changes in version 0.2.0.7-alpha - 2007-09-21
34647 This seventh development snapshot makes bridges work again, makes bridge
34648 authorities work for the first time, fixes two huge performance flaws
34649 in hidden services, and fixes a variety of minor issues.
34651 o New directory authorities:
34652 - Set up moria1 and tor26 as the first v3 directory authorities. See
34653 doc/spec/dir-spec.txt for details on the new directory design.
34655 o Major bugfixes (crashes):
34656 - Fix possible segfaults in functions called from
34657 rend_process_relay_cell(). Bugfix on 0.1.2.x.
34659 o Major bugfixes (bridges):
34660 - Fix a bug that made servers send a "404 Not found" in response to
34661 attempts to fetch their server descriptor. This caused Tor servers
34662 to take many minutes to establish reachability for their DirPort,
34663 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
34664 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
34665 users configure that and specify a bridge with an identity
34666 fingerprint, now they will lookup the bridge descriptor at the
34667 default bridge authority via a one-hop tunnel, but once circuits
34668 are established they will switch to a three-hop tunnel for later
34669 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
34671 o Major bugfixes (hidden services):
34672 - Hidden services were choosing introduction points uniquely by
34673 hexdigest, but when constructing the hidden service descriptor
34674 they merely wrote the (potentially ambiguous) nickname.
34675 - Clients now use the v2 intro format for hidden service
34676 connections: they specify their chosen rendezvous point by identity
34677 digest rather than by (potentially ambiguous) nickname. Both
34678 are bugfixes on 0.1.2.x, and they could speed up hidden service
34679 connections dramatically. Thanks to Karsten Loesing.
34681 o Minor features (security):
34682 - As a client, do not believe any server that tells us that an
34683 address maps to an internal address space.
34684 - Make it possible to enable HashedControlPassword and
34685 CookieAuthentication at the same time.
34687 o Minor features (guard nodes):
34688 - Tag every guard node in our state file with the version that
34689 we believe added it, or with our own version if we add it. This way,
34690 if a user temporarily runs an old version of Tor and then switches
34691 back to a new one, she doesn't automatically lose her guards.
34693 o Minor features (speed):
34694 - When implementing AES counter mode, update only the portions of the
34695 counter buffer that need to change, and don't keep separate
34696 network-order and host-order counters when they are the same (i.e.,
34697 on big-endian hosts.)
34699 o Minor features (controller):
34700 - Accept LF instead of CRLF on controller, since some software has a
34701 hard time generating real Internet newlines.
34702 - Add GETINFO values for the server status events
34703 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
34706 o Removed features:
34707 - Routers no longer include bandwidth-history lines in their
34708 descriptors; this information is already available in extra-info
34709 documents, and including it in router descriptors took up 60%
34710 (!) of compressed router descriptor downloads. Completes
34711 implementation of proposal 104.
34712 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
34713 and TorControl.py, as they use the old v0 controller protocol,
34714 and are obsoleted by TorFlow anyway.
34715 - Drop support for v1 rendezvous descriptors, since we never used
34716 them anyway, and the code has probably rotted by now. Based on
34717 patch from Karsten Loesing.
34718 - On OSX, stop warning the user that kqueue support in libevent is
34719 "experimental", since it seems to have worked fine for ages.
34722 - When generating information telling us how to extend to a given
34723 router, do not try to include the nickname if it is absent. Fixes
34724 bug 467. Bugfix on 0.2.0.3-alpha.
34725 - Fix a user-triggerable (but not remotely-triggerable) segfault
34726 in expand_filename(). Bugfix on 0.1.2.x.
34727 - Fix a memory leak when freeing incomplete requests from DNSPort.
34728 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
34729 - Don't try to access (or alter) the state file when running
34730 --list-fingerprint or --verify-config or --hash-password. (Resolves
34731 bug 499.) Bugfix on 0.1.2.x.
34732 - Servers used to decline to publish their DirPort if their
34733 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
34734 were below a threshold. Now they only look at BandwidthRate and
34735 RelayBandwidthRate. Bugfix on 0.1.2.x.
34736 - Remove an optimization in the AES counter-mode code that assumed
34737 that the counter never exceeded 2^68. When the counter can be set
34738 arbitrarily as an IV (as it is by Karsten's new hidden services
34739 code), this assumption no longer holds. Bugfix on 0.1.2.x.
34740 - Resume listing "AUTHORITY" flag for authorities in network status.
34741 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
34743 o Code simplifications and refactoring:
34744 - Revamp file-writing logic so we don't need to have the entire
34745 contents of a file in memory at once before we write to disk. Tor,
34747 - Turn "descriptor store" into a full-fledged type.
34748 - Move all NT services code into a separate source file.
34749 - Unify all code that computes medians, percentile elements, etc.
34750 - Get rid of a needless malloc when parsing address policies.
34753 Changes in version 0.1.2.17 - 2007-08-30
34754 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
34755 X bundles. Vidalia 0.0.14 makes authentication required for the
34756 ControlPort in the default configuration, which addresses important
34757 security risks. Everybody who uses Vidalia (or another controller)
34760 In addition, this Tor update fixes major load balancing problems with
34761 path selection, which should speed things up a lot once many people
34764 o Major bugfixes (security):
34765 - We removed support for the old (v0) control protocol. It has been
34766 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
34767 become more of a headache than it's worth.
34769 o Major bugfixes (load balancing):
34770 - When choosing nodes for non-guard positions, weight guards
34771 proportionally less, since they already have enough load. Patch
34773 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34774 will allow fast Tor servers to get more attention.
34775 - When we're upgrading from an old Tor version, forget our current
34776 guards and pick new ones according to the new weightings. These
34777 three load balancing patches could raise effective network capacity
34778 by a factor of four. Thanks to Mike Perry for measurements.
34780 o Major bugfixes (stream expiration):
34781 - Expire not-yet-successful application streams in all cases if
34782 they've been around longer than SocksTimeout. Right now there are
34783 some cases where the stream will live forever, demanding a new
34784 circuit every 15 seconds. Fixes bug 454; reported by lodger.
34786 o Minor features (controller):
34787 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34788 is valid before any authentication has been received. It tells
34789 a controller what kind of authentication is expected, and what
34790 protocol is spoken. Implements proposal 119.
34792 o Minor bugfixes (performance):
34793 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
34794 greatly speeding up loading cached-routers from disk on startup.
34795 - Disable sentinel-based debugging for buffer code: we squashed all
34796 the bugs that this was supposed to detect a long time ago, and now
34797 its only effect is to change our buffer sizes from nice powers of
34798 two (which platform mallocs tend to like) to values slightly over
34799 powers of two (which make some platform mallocs sad).
34801 o Minor bugfixes (misc):
34802 - If exit bandwidth ever exceeds one third of total bandwidth, then
34803 use the correct formula to weight exit nodes when choosing paths.
34804 Based on patch from Mike Perry.
34805 - Choose perfectly fairly among routers when choosing by bandwidth and
34806 weighting by fraction of bandwidth provided by exits. Previously, we
34807 would choose with only approximate fairness, and correct ourselves
34808 if we ran off the end of the list.
34809 - If we require CookieAuthentication but we fail to write the
34810 cookie file, we would warn but not exit, and end up in a state
34811 where no controller could authenticate. Now we exit.
34812 - If we require CookieAuthentication, stop generating a new cookie
34813 every time we change any piece of our config.
34814 - Refuse to start with certain directory authority keys, and
34815 encourage people using them to stop.
34816 - Terminate multi-line control events properly. Original patch
34818 - Fix a minor memory leak when we fail to find enough suitable
34819 servers to choose a circuit.
34820 - Stop leaking part of the descriptor when we run into a particularly
34821 unparseable piece of it.
34824 Changes in version 0.2.0.6-alpha - 2007-08-26
34825 This sixth development snapshot features a new Vidalia version in the
34826 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
34827 the ControlPort in the default configuration, which addresses important
34830 In addition, this snapshot fixes major load balancing problems
34831 with path selection, which should speed things up a lot once many
34832 people have upgraded. The directory authorities also use a new
34833 mean-time-between-failure approach to tracking which servers are stable,
34834 rather than just looking at the most recent uptime.
34836 o New directory authorities:
34837 - Set up Tonga as the default bridge directory authority.
34840 - Directory authorities now track servers by weighted
34841 mean-times-between-failures. When we have 4 or more days of data,
34842 use measured MTBF rather than declared uptime to decide whether
34843 to call a router Stable. Implements proposal 108.
34845 o Major bugfixes (load balancing):
34846 - When choosing nodes for non-guard positions, weight guards
34847 proportionally less, since they already have enough load. Patch
34849 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34850 will allow fast Tor servers to get more attention.
34851 - When we're upgrading from an old Tor version, forget our current
34852 guards and pick new ones according to the new weightings. These
34853 three load balancing patches could raise effective network capacity
34854 by a factor of four. Thanks to Mike Perry for measurements.
34856 o Major bugfixes (descriptor parsing):
34857 - Handle unexpected whitespace better in malformed descriptors. Bug
34858 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
34861 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
34862 GETINFO for Torstat to use until it can switch to using extrainfos.
34863 - Optionally (if built with -DEXPORTMALLINFO) export the output
34864 of mallinfo via http, as tor/mallinfo.txt. Only accessible
34868 - Do not intermix bridge routers with controller-added
34869 routers. (Bugfix on 0.2.0.x)
34870 - Do not fail with an assert when accept() returns an unexpected
34871 address family. Addresses but does not wholly fix bug 483. (Bugfix
34873 - Let directory authorities startup even when they can't generate
34874 a descriptor immediately, e.g. because they don't know their
34876 - Stop putting the authentication cookie in a file called "0"
34877 in your working directory if you don't specify anything for the
34878 new CookieAuthFile option. Reported by Matt Edman.
34879 - Make it possible to read the PROTOCOLINFO response in a way that
34880 conforms to our control-spec. Reported by Matt Edman.
34881 - Fix a minor memory leak when we fail to find enough suitable
34882 servers to choose a circuit. Bugfix on 0.1.2.x.
34883 - Stop leaking part of the descriptor when we run into a particularly
34884 unparseable piece of it. Bugfix on 0.1.2.x.
34885 - Unmap the extrainfo cache file on exit.
34888 Changes in version 0.2.0.5-alpha - 2007-08-19
34889 This fifth development snapshot fixes compilation on Windows again;
34890 fixes an obnoxious client-side bug that slowed things down and put
34891 extra load on the network; gets us closer to using the v3 directory
34892 voting scheme; makes it easier for Tor controllers to use cookie-based
34893 authentication; and fixes a variety of other bugs.
34895 o Removed features:
34896 - Version 1 directories are no longer generated in full. Instead,
34897 authorities generate and serve "stub" v1 directories that list
34898 no servers. This will stop Tor versions 0.1.0.x and earlier from
34899 working, but (for security reasons) nobody should be running those
34902 o Major bugfixes (compilation, 0.2.0.x):
34903 - Try to fix Win32 compilation again: improve checking for IPv6 types.
34904 - Try to fix MSVC compilation: build correctly on platforms that do
34905 not define s6_addr16 or s6_addr32.
34906 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
34909 o Major bugfixes (stream expiration):
34910 - Expire not-yet-successful application streams in all cases if
34911 they've been around longer than SocksTimeout. Right now there are
34912 some cases where the stream will live forever, demanding a new
34913 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
34914 reported by lodger.
34916 o Minor features (directory servers):
34917 - When somebody requests a list of statuses or servers, and we have
34918 none of those, return a 404 rather than an empty 200.
34920 o Minor features (directory voting):
34921 - Store v3 consensus status consensuses on disk, and reload them
34924 o Minor features (security):
34925 - Warn about unsafe ControlPort configurations.
34926 - Refuse to start with certain directory authority keys, and
34927 encourage people using them to stop.
34929 o Minor features (controller):
34930 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34931 is valid before any authentication has been received. It tells
34932 a controller what kind of authentication is expected, and what
34933 protocol is spoken. Implements proposal 119.
34934 - New config option CookieAuthFile to choose a new location for the
34935 cookie authentication file, and config option
34936 CookieAuthFileGroupReadable to make it group-readable.
34938 o Minor features (unit testing):
34939 - Add command-line arguments to unit-test executable so that we can
34940 invoke any chosen test from the command line rather than having
34941 to run the whole test suite at once; and so that we can turn on
34942 logging for the unit tests.
34944 o Minor bugfixes (on 0.1.2.x):
34945 - If we require CookieAuthentication but we fail to write the
34946 cookie file, we would warn but not exit, and end up in a state
34947 where no controller could authenticate. Now we exit.
34948 - If we require CookieAuthentication, stop generating a new cookie
34949 every time we change any piece of our config.
34950 - When loading bandwidth history, do not believe any information in
34951 the future. Fixes bug 434.
34952 - When loading entry guard information, do not believe any information
34954 - When we have our clock set far in the future and generate an
34955 onion key, then re-set our clock to be correct, we should not stop
34956 the onion key from getting rotated.
34957 - Clean up torrc sample config file.
34958 - Do not automatically run configure from autogen.sh. This
34959 non-standard behavior tended to annoy people who have built other
34962 o Minor bugfixes (on 0.2.0.x):
34963 - Fix a bug with AutomapHostsOnResolve that would always cause
34964 the second request to fail. Bug reported by Kate. Bugfix on
34966 - Fix a bug in ADDRMAP controller replies that would sometimes
34967 try to print a NULL. Patch from tup.
34968 - Read v3 directory authority keys from the right location.
34969 - Numerous bugfixes to directory voting code.
34972 Changes in version 0.1.2.16 - 2007-08-01
34973 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
34974 remote attacker in certain situations to rewrite the user's torrc
34975 configuration file. This can completely compromise anonymity of users
34976 in most configurations, including those running the Vidalia bundles,
34977 TorK, etc. Or worse.
34979 o Major security fixes:
34980 - Close immediately after missing authentication on control port;
34981 do not allow multiple authentication attempts.
34984 Changes in version 0.2.0.4-alpha - 2007-08-01
34985 This fourth development snapshot fixes a critical security vulnerability
34986 for most users, specifically those running Vidalia, TorK, etc. Everybody
34987 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
34989 o Major security fixes:
34990 - Close immediately after missing authentication on control port;
34991 do not allow multiple authentication attempts.
34993 o Major bugfixes (compilation):
34994 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
34997 o Minor features (performance):
34998 - Be even more aggressive about releasing RAM from small
34999 empty buffers. Thanks to our free-list code, this shouldn't be too
35000 performance-intensive.
35001 - Disable sentinel-based debugging for buffer code: we squashed all
35002 the bugs that this was supposed to detect a long time ago, and
35003 now its only effect is to change our buffer sizes from nice
35004 powers of two (which platform mallocs tend to like) to values
35005 slightly over powers of two (which make some platform mallocs sad).
35006 - Log malloc statistics from mallinfo() on platforms where it
35010 Changes in version 0.2.0.3-alpha - 2007-07-29
35011 This third development snapshot introduces new experimental
35012 blocking-resistance features and a preliminary version of the v3
35013 directory voting design, and includes many other smaller features
35017 - The first pieces of our "bridge" design for blocking-resistance
35018 are implemented. People can run bridge directory authorities;
35019 people can run bridges; and people can configure their Tor clients
35020 with a set of bridges to use as the first hop into the Tor network.
35021 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
35023 - Create listener connections before we setuid to the configured
35024 User and Group. Now non-Windows users can choose port values
35025 under 1024, start Tor as root, and have Tor bind those ports
35026 before it changes to another UID. (Windows users could already
35028 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
35029 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
35030 on "vserver" accounts. (Patch from coderman.)
35031 - Be even more aggressive about separating local traffic from relayed
35032 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
35034 o Major features (experimental):
35035 - First cut of code for "v3 dir voting": directory authorities will
35036 vote on a common network status document rather than each publishing
35037 their own opinion. This code needs more testing and more corner-case
35038 handling before it's ready for use.
35041 - Directory authorities now call routers Fast if their bandwidth is
35042 at least 100KB/s, and consider their bandwidth adequate to be a
35043 Guard if it is at least 250KB/s, no matter the medians. This fix
35044 complements proposal 107. [Bugfix on 0.1.2.x]
35045 - Directory authorities now never mark more than 3 servers per IP as
35046 Valid and Running. (Implements proposal 109, by Kevin Bauer and
35048 - Minor change to organizationName and commonName generation
35049 procedures in TLS certificates during Tor handshakes, to invalidate
35050 some earlier censorware approaches. This is not a long-term
35051 solution, but applying it will give us a bit of time to look into
35052 the epidemiology of countermeasures as they spread.
35054 o Major bugfixes (directory):
35055 - Rewrite directory tokenization code to never run off the end of
35056 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
35058 o Minor features (controller):
35059 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
35060 match requests to applications. (Patch from Robert Hogan.)
35061 - Report address and port correctly on connections to DNSPort. (Patch
35062 from Robert Hogan.)
35063 - Add a RESOLVE command to launch hostname lookups. (Original patch
35064 from Robert Hogan.)
35065 - Add GETINFO status/enough-dir-info to let controllers tell whether
35066 Tor has downloaded sufficient directory information. (Patch
35068 - You can now use the ControlSocket option to tell Tor to listen for
35069 controller connections on Unix domain sockets on systems that
35070 support them. (Patch from Peter Palfrader.)
35071 - STREAM NEW events are generated for DNSPort requests and for
35072 tunneled directory connections. (Patch from Robert Hogan.)
35073 - New "GETINFO address-mappings/*" command to get address mappings
35074 with expiry information. "addr-mappings/*" is now deprecated.
35077 o Minor features (misc):
35078 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
35080 - The tor-gencert tool for v3 directory authorities now creates all
35081 files as readable to the file creator only, and write-protects
35082 the authority identity key.
35083 - When dumping memory usage, list bytes used in buffer memory
35085 - When running with dmalloc, dump more stats on hup and on exit.
35086 - Directory authorities now fail quickly and (relatively) harmlessly
35087 if they generate a network status document that is somehow
35090 o Traffic load balancing improvements:
35091 - If exit bandwidth ever exceeds one third of total bandwidth, then
35092 use the correct formula to weight exit nodes when choosing paths.
35093 (Based on patch from Mike Perry.)
35094 - Choose perfectly fairly among routers when choosing by bandwidth and
35095 weighting by fraction of bandwidth provided by exits. Previously, we
35096 would choose with only approximate fairness, and correct ourselves
35097 if we ran off the end of the list. [Bugfix on 0.1.2.x]
35099 o Performance improvements:
35100 - Be more aggressive with freeing buffer RAM or putting it on the
35102 - Use Critical Sections rather than Mutexes for synchronizing threads
35103 on win32; Mutexes are heavier-weight, and designed for synchronizing
35106 o Deprecated and removed features:
35107 - RedirectExits is now deprecated.
35108 - Stop allowing address masks that do not correspond to bit prefixes.
35109 We have warned about these for a really long time; now it's time
35110 to reject them. (Patch from croup.)
35112 o Minor bugfixes (directory):
35113 - Fix another crash bug related to extra-info caching. (Bug found by
35114 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
35115 - Directories no longer return a "304 not modified" when they don't
35116 have the networkstatus the client asked for. Also fix a memory
35117 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
35118 - We had accidentally labelled 0.1.2.x directory servers as not
35119 suitable for begin_dir requests, and had labelled no directory
35120 servers as suitable for uploading extra-info documents. [Bugfix
35123 o Minor bugfixes (dns):
35124 - Fix a crash when DNSPort is set more than once. (Patch from Robert
35125 Hogan.) [Bugfix on 0.2.0.2-alpha]
35126 - Add DNSPort connections to the global connection list, so that we
35127 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
35129 - Fix a dangling reference that could lead to a crash when DNSPort is
35130 changed or closed (Patch from Robert Hogan.) [Bugfix on
35133 o Minor bugfixes (controller):
35134 - Provide DNS expiry times in GMT, not in local time. For backward
35135 compatibility, ADDRMAP events only provide GMT expiry in an extended
35136 field. "GETINFO address-mappings" always does the right thing.
35137 - Use CRLF line endings properly in NS events.
35138 - Terminate multi-line control events properly. (Original patch
35139 from tup.) [Bugfix on 0.1.2.x-alpha]
35140 - Do not include spaces in SOURCE_ADDR fields in STREAM
35141 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
35144 Changes in version 0.1.2.15 - 2007-07-17
35145 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
35146 problems, fixes compilation on BSD, and fixes a variety of other
35147 bugs. Everybody should upgrade.
35149 o Major bugfixes (compilation):
35150 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
35152 o Major bugfixes (crashes):
35153 - Try even harder not to dereference the first character after
35154 an mmap(). Reported by lodger.
35155 - Fix a crash bug in directory authorities when we re-number the
35156 routerlist while inserting a new router.
35157 - When the cached-routers file is an even multiple of the page size,
35158 don't run off the end and crash. (Fixes bug 455; based on idea
35160 - Fix eventdns.c behavior on Solaris: It is critical to include
35161 orconfig.h _before_ sys/types.h, so that we can get the expected
35162 definition of _FILE_OFFSET_BITS.
35164 o Major bugfixes (security):
35165 - Fix a possible buffer overrun when using BSD natd support. Bug
35167 - When sending destroy cells from a circuit's origin, don't include
35168 the reason for tearing down the circuit. The spec says we didn't,
35169 and now we actually don't. Reported by lodger.
35170 - Keep streamids from different exits on a circuit separate. This
35171 bug may have allowed other routers on a given circuit to inject
35172 cells into streams. Reported by lodger; fixes bug 446.
35173 - If there's a never-before-connected-to guard node in our list,
35174 never choose any guards past it. This way we don't expand our
35175 guard list unless we need to.
35177 o Minor bugfixes (guard nodes):
35178 - Weight guard selection by bandwidth, so that low-bandwidth nodes
35179 don't get overused as guards.
35181 o Minor bugfixes (directory):
35182 - Correctly count the number of authorities that recommend each
35183 version. Previously, we were under-counting by 1.
35184 - Fix a potential crash bug when we load many server descriptors at
35185 once and some of them make others of them obsolete. Fixes bug 458.
35187 o Minor bugfixes (hidden services):
35188 - Stop tearing down the whole circuit when the user asks for a
35189 connection to a port that the hidden service didn't configure.
35192 o Minor bugfixes (misc):
35193 - On Windows, we were preventing other processes from reading
35194 cached-routers while Tor was running. Reported by janbar.
35195 - Fix a possible (but very unlikely) bug in picking routers by
35196 bandwidth. Add a log message to confirm that it is in fact
35197 unlikely. Patch from lodger.
35198 - Backport a couple of memory leak fixes.
35199 - Backport miscellaneous cosmetic bugfixes.
35202 Changes in version 0.2.0.2-alpha - 2007-06-02
35203 o Major bugfixes on 0.2.0.1-alpha:
35204 - Fix an assertion failure related to servers without extra-info digests.
35205 Resolves bugs 441 and 442.
35207 o Minor features (directory):
35208 - Support "If-Modified-Since" when answering HTTP requests for
35209 directories, running-routers documents, and network-status documents.
35210 (There's no need to support it for router descriptors, since those
35211 are downloaded by descriptor digest.)
35213 o Minor build issues:
35214 - Clear up some MIPSPro compiler warnings.
35215 - When building from a tarball on a machine that happens to have SVK
35216 installed, report the micro-revision as whatever version existed
35217 in the tarball, not as "x".
35220 Changes in version 0.2.0.1-alpha - 2007-06-01
35221 This early development snapshot provides new features for people running
35222 Tor as both a client and a server (check out the new RelayBandwidth
35223 config options); lets Tor run as a DNS proxy; and generally moves us
35224 forward on a lot of fronts.
35226 o Major features, server usability:
35227 - New config options RelayBandwidthRate and RelayBandwidthBurst:
35228 a separate set of token buckets for relayed traffic. Right now
35229 relayed traffic is defined as answers to directory requests, and
35230 OR connections that don't have any local circuits on them.
35232 o Major features, client usability:
35233 - A client-side DNS proxy feature to replace the need for
35234 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
35235 for DNS requests on port 9999, use the Tor network to resolve them
35236 anonymously, and send the reply back like a regular DNS server.
35237 The code still only implements a subset of DNS.
35238 - Make PreferTunneledDirConns and TunnelDirConns work even when
35239 we have no cached directory info. This means Tor clients can now
35240 do all of their connections protected by TLS.
35242 o Major features, performance and efficiency:
35243 - Directory authorities accept and serve "extra info" documents for
35244 routers. These documents contain fields from router descriptors
35245 that aren't usually needed, and that use a lot of excess
35246 bandwidth. Once these fields are removed from router descriptors,
35247 the bandwidth savings should be about 60%. [Partially implements
35249 - Servers upload extra-info documents to any authority that accepts
35250 them. Authorities (and caches that have been configured to download
35251 extra-info documents) download them as needed. [Partially implements
35253 - Change the way that Tor buffers data that it is waiting to write.
35254 Instead of queueing data cells in an enormous ring buffer for each
35255 client->OR or OR->OR connection, we now queue cells on a separate
35256 queue for each circuit. This lets us use less slack memory, and
35257 will eventually let us be smarter about prioritizing different kinds
35259 - Use memory pools to allocate cells with better speed and memory
35260 efficiency, especially on platforms where malloc() is inefficient.
35261 - Stop reading on edge connections when their corresponding circuit
35262 buffers are full; start again as the circuits empty out.
35264 o Major features, other:
35265 - Add an HSAuthorityRecordStats option that hidden service authorities
35266 can use to track statistics of overall hidden service usage without
35267 logging information that would be very useful to an attacker.
35268 - Start work implementing multi-level keys for directory authorities:
35269 Add a standalone tool to generate key certificates. (Proposal 103.)
35272 - Directory authorities now call routers Stable if they have an
35273 uptime of at least 30 days, even if that's not the median uptime
35274 in the network. Implements proposal 107, suggested by Kevin Bauer
35277 o Minor fixes (resource management):
35278 - Count the number of open sockets separately from the number
35279 of active connection_t objects. This will let us avoid underusing
35280 our allocated connection limit.
35281 - We no longer use socket pairs to link an edge connection to an
35282 anonymous directory connection or a DirPort test connection.
35283 Instead, we track the link internally and transfer the data
35284 in-process. This saves two sockets per "linked" connection (at the
35285 client and at the server), and avoids the nasty Windows socketpair()
35287 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
35288 for every single inactive connection_t. Free items from the
35289 4k/16k-buffer free lists when they haven't been used for a while.
35291 o Minor features (build):
35292 - Make autoconf search for libevent, openssl, and zlib consistently.
35293 - Update deprecated macros in configure.in.
35294 - When warning about missing headers, tell the user to let us
35295 know if the compile succeeds anyway, so we can downgrade the
35297 - Include the current subversion revision as part of the version
35298 string: either fetch it directly if we're in an SVN checkout, do
35299 some magic to guess it if we're in an SVK checkout, or use
35300 the last-detected version if we're building from a .tar.gz.
35301 Use this version consistently in log messages.
35303 o Minor features (logging):
35304 - Always prepend "Bug: " to any log message about a bug.
35305 - Put a platform string (e.g. "Linux i686") in the startup log
35306 message, so when people paste just their logs, we know if it's
35307 OpenBSD or Windows or what.
35308 - When logging memory usage, break down memory used in buffers by
35311 o Minor features (directory system):
35312 - New config option V2AuthoritativeDirectory that all directory
35313 authorities should set. This will let future authorities choose
35314 not to serve V2 directory information.
35315 - Directory authorities allow multiple router descriptors and/or extra
35316 info documents to be uploaded in a single go. This will make
35317 implementing proposal 104 simpler.
35319 o Minor features (controller):
35320 - Add a new config option __DisablePredictedCircuits designed for
35321 use by the controller, when we don't want Tor to build any circuits
35323 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
35324 so we can exit from the middle of the circuit.
35325 - Implement "getinfo status/circuit-established".
35326 - Implement "getinfo status/version/..." so a controller can tell
35327 whether the current version is recommended, and whether any versions
35328 are good, and how many authorities agree. (Patch from shibz.)
35330 o Minor features (hidden services):
35331 - Allow multiple HiddenServicePort directives with the same virtual
35332 port; when they occur, the user is sent round-robin to one
35333 of the target ports chosen at random. Partially fixes bug 393 by
35334 adding limited ad-hoc round-robining.
35336 o Minor features (other):
35338 - Add a new AutomapHostsOnResolve option: when it is enabled, any
35339 resolve request for hosts matching a given pattern causes Tor to
35340 generate an internal virtual address mapping for that host. This
35341 allows DNSPort to work sensibly with hidden service users. By
35342 default, .exit and .onion addresses are remapped; the list of
35343 patterns can be reconfigured with AutomapHostsSuffixes.
35344 - Add an "-F" option to tor-resolve to force a resolve for a .onion
35345 address. Thanks to the AutomapHostsOnResolve option, this is no
35346 longer a completely silly thing to do.
35347 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
35348 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
35349 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
35350 minus 1 byte: the actual maximum declared bandwidth.
35352 o Removed features:
35353 - Removed support for the old binary "version 0" controller protocol.
35354 This has been deprecated since 0.1.1, and warnings have been issued
35355 since 0.1.2. When we encounter a v0 control message, we now send
35356 back an error and close the connection.
35357 - Remove the old "dns worker" server DNS code: it hasn't been default
35358 since 0.1.2.2-alpha, and all the servers seem to be using the new
35361 o Minor bugfixes (portability):
35362 - Even though Windows is equally happy with / and \ as path separators,
35363 try to use \ consistently on Windows and / consistently on Unix: it
35364 makes the log messages nicer.
35365 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
35366 - Read resolv.conf files correctly on platforms where read() returns
35367 partial results on small file reads.
35369 o Minor bugfixes (directory):
35370 - Correctly enforce that elements of directory objects do not appear
35371 more often than they are allowed to appear.
35372 - When we are reporting the DirServer line we just parsed, we were
35373 logging the second stanza of the key fingerprint, not the first.
35375 o Minor bugfixes (logging):
35376 - When we hit an EOF on a log (probably because we're shutting down),
35377 don't try to remove the log from the list: just mark it as
35378 unusable. (Bulletproofs against bug 222.)
35380 o Minor bugfixes (other):
35381 - In the exitlist script, only consider the most recently published
35382 server descriptor for each server. Also, when the user requests
35383 a list of servers that _reject_ connections to a given address,
35384 explicitly exclude the IPs that also have servers that accept
35385 connections to that address. (Resolves bug 405.)
35386 - Stop allowing hibernating servers to be "stable" or "fast".
35387 - On Windows, we were preventing other processes from reading
35388 cached-routers while Tor was running. (Reported by janbar)
35389 - Make the NodeFamilies config option work. (Reported by
35390 lodger -- it has never actually worked, even though we added it
35392 - Check return values from pthread_mutex functions.
35393 - Don't save non-general-purpose router descriptors to the disk cache,
35394 because we have no way of remembering what their purpose was when
35396 - Add even more asserts to hunt down bug 417.
35397 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
35398 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
35399 Add a log message to confirm that it is in fact unlikely.
35401 o Minor bugfixes (controller):
35402 - Make 'getinfo fingerprint' return a 551 error if we're not a
35403 server, so we match what the control spec claims we do. Reported
35405 - Fix a typo in an error message when extendcircuit fails that
35406 caused us to not follow the \r\n-based delimiter protocol. Reported
35409 o Code simplifications and refactoring:
35410 - Stop passing around circuit_t and crypt_path_t pointers that are
35411 implicit in other procedure arguments.
35412 - Drop the old code to choke directory connections when the
35413 corresponding OR connections got full: thanks to the cell queue
35414 feature, OR conns don't get full any more.
35415 - Make dns_resolve() handle attaching connections to circuits
35416 properly, so the caller doesn't have to.
35417 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
35418 - Keep the connection array as a dynamic smartlist_t, rather than as
35419 a fixed-sized array. This is important, as the number of connections
35420 is becoming increasingly decoupled from the number of sockets.
35423 Changes in version 0.1.2.14 - 2007-05-25
35424 Tor 0.1.2.14 changes the addresses of two directory authorities (this
35425 change especially affects those who serve or use hidden services),
35426 and fixes several other crash- and security-related bugs.
35428 o Directory authority changes:
35429 - Two directory authorities (moria1 and moria2) just moved to new
35430 IP addresses. This change will particularly affect those who serve
35431 or use hidden services.
35433 o Major bugfixes (crashes):
35434 - If a directory server runs out of space in the connection table
35435 as it's processing a begin_dir request, it will free the exit stream
35436 but leave it attached to the circuit, leading to unpredictable
35437 behavior. (Reported by seeess, fixes bug 425.)
35438 - Fix a bug in dirserv_remove_invalid() that would cause authorities
35439 to corrupt memory under some really unlikely scenarios.
35440 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
35441 - Avoid segfaults when reading from mmaped descriptor file. (Reported
35444 o Major bugfixes (security):
35445 - When choosing an entry guard for a circuit, avoid using guards
35446 that are in the same family as the chosen exit -- not just guards
35447 that are exactly the chosen exit. (Reported by lodger.)
35449 o Major bugfixes (resource management):
35450 - If a directory authority is down, skip it when deciding where to get
35451 networkstatus objects or descriptors. Otherwise we keep asking
35452 every 10 seconds forever. Fixes bug 384.
35453 - Count it as a failure if we fetch a valid network-status but we
35454 don't want to keep it. Otherwise we'll keep fetching it and keep
35455 not wanting to keep it. Fixes part of bug 422.
35456 - If all of our dirservers have given us bad or no networkstatuses
35457 lately, then stop hammering them once per minute even when we
35458 think they're failed. Fixes another part of bug 422.
35461 - Actually set the purpose correctly for descriptors inserted with
35462 purpose=controller.
35463 - When we have k non-v2 authorities in our DirServer config,
35464 we ignored the last k authorities in the list when updating our
35466 - Correctly back-off from requesting router descriptors that we are
35467 having a hard time downloading.
35468 - Read resolv.conf files correctly on platforms where read() returns
35469 partial results on small file reads.
35470 - Don't rebuild the entire router store every time we get 32K of
35471 routers: rebuild it when the journal gets very large, or when
35472 the gaps in the store get very large.
35475 - When routers publish SVN revisions in their router descriptors,
35476 authorities now include those versions correctly in networkstatus
35478 - Warn when using a version of libevent before 1.3b to run a server on
35479 OSX or BSD: these versions interact badly with userspace threads.
35482 Changes in version 0.1.2.13 - 2007-04-24
35483 This release features some major anonymity fixes, such as safer path
35484 selection; better client performance; faster bootstrapping, better
35485 address detection, and better DNS support for servers; write limiting as
35486 well as read limiting to make servers easier to run; and a huge pile of
35487 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
35489 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
35490 of the Freenode IRC network, remembering his patience and vision for
35491 free speech on the Internet.
35494 - Fix a memory leak when we ask for "all" networkstatuses and we
35495 get one we don't recognize.
35496 - Add more asserts to hunt down bug 417.
35497 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
35500 Changes in version 0.1.2.12-rc - 2007-03-16
35502 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
35503 directory information requested inside Tor connections (i.e. via
35504 begin_dir cells). It only triggered when the same connection was
35505 serving other data at the same time. Reported by seeess.
35508 - When creating a circuit via the controller, send a 'launched'
35509 event when we're done, so we follow the spec better.
35512 Changes in version 0.1.2.11-rc - 2007-03-15
35513 o Minor bugfixes (controller), reported by daejees:
35514 - Correct the control spec to match how the code actually responds
35515 to 'getinfo addr-mappings/*'.
35516 - The control spec described a GUARDS event, but the code
35517 implemented a GUARD event. Standardize on GUARD, but let people
35518 ask for GUARDS too.
35521 Changes in version 0.1.2.10-rc - 2007-03-07
35522 o Major bugfixes (Windows):
35523 - Do not load the NT services library functions (which may not exist)
35524 just to detect if we're a service trying to shut down. Now we run
35525 on Win98 and friends again.
35527 o Minor bugfixes (other):
35528 - Clarify a couple of log messages.
35529 - Fix a misleading socks5 error number.
35532 Changes in version 0.1.2.9-rc - 2007-03-02
35533 o Major bugfixes (Windows):
35534 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
35535 of the usual GCC "%llu". This prevents a bug when saving 64-bit
35536 int configuration values: the high-order 32 bits would get
35537 truncated. In particular, we were being bitten by the default
35538 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
35539 and maybe also bug 397.)
35541 o Minor bugfixes (performance):
35542 - Use OpenSSL's AES implementation on platforms where it's faster.
35543 This could save us as much as 10% CPU usage.
35545 o Minor bugfixes (server):
35546 - Do not rotate onion key immediately after setting it for the first
35549 o Minor bugfixes (directory authorities):
35550 - Stop calling servers that have been hibernating for a long time
35551 "stable". Also, stop letting hibernating or obsolete servers affect
35552 uptime and bandwidth cutoffs.
35553 - Stop listing hibernating servers in the v1 directory.
35555 o Minor bugfixes (hidden services):
35556 - Upload hidden service descriptors slightly less often, to reduce
35557 load on authorities.
35559 o Minor bugfixes (other):
35560 - Fix an assert that could trigger if a controller quickly set then
35561 cleared EntryNodes. Bug found by Udo van den Heuvel.
35562 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
35564 - Fix a potential race condition in the rpm installer. Found by
35566 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
35567 of 2 as indicating that the server is completely bad; it sometimes
35568 means that the server is just bad for the request in question. (may fix
35569 the last of bug 326.)
35570 - Disable encrypted directory connections when we don't have a server
35571 descriptor for the destination. We'll get this working again in
35575 Changes in version 0.1.2.8-beta - 2007-02-26
35576 o Major bugfixes (crashes):
35577 - Stop crashing when the controller asks us to resetconf more than
35578 one config option at once. (Vidalia 0.0.11 does this.)
35579 - Fix a crash that happened on Win98 when we're given command-line
35580 arguments: don't try to load NT service functions from advapi32.dll
35581 except when we need them. (Bug introduced in 0.1.2.7-alpha;
35583 - Fix a longstanding obscure crash bug that could occur when
35584 we run out of DNS worker processes. (Resolves bug 390.)
35586 o Major bugfixes (hidden services):
35587 - Correctly detect whether hidden service descriptor downloads are
35588 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
35590 o Major bugfixes (accounting):
35591 - When we start during an accounting interval before it's time to wake
35592 up, remember to wake up at the correct time. (May fix bug 342.)
35594 o Minor bugfixes (controller):
35595 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
35596 clear the corresponding on_circuit variable, and remember later
35597 that we don't need to send a redundant CLOSED event. Resolves part
35599 - Report events where a resolve succeeded or where we got a socks
35600 protocol error correctly, rather than calling both of them
35602 - Change reported stream target addresses to IP consistently when
35603 we finally get the IP from an exit node.
35604 - Send log messages to the controller even if they happen to be very
35607 o Minor bugfixes (other):
35608 - Display correct results when reporting which versions are
35609 recommended, and how recommended they are. (Resolves bug 383.)
35610 - Improve our estimates for directory bandwidth to be less random:
35611 guess that an unrecognized directory will have the average bandwidth
35612 from all known directories, not that it will have the average
35613 bandwidth from those directories earlier than it on the list.
35614 - If we start a server with ClientOnly 1, then set ClientOnly to 0
35615 and hup, stop triggering an assert based on an empty onion_key.
35616 - On platforms with no working mmap() equivalent, don't warn the
35617 user when cached-routers doesn't exist.
35618 - Warn the user when mmap() [or its equivalent] fails for some reason
35619 other than file-not-found.
35620 - Don't warn the user when cached-routers.new doesn't exist: that's
35621 perfectly fine when starting up for the first time.
35622 - When EntryNodes are configured, rebuild the guard list to contain,
35623 in order: the EntryNodes that were guards before; the rest of the
35624 EntryNodes; the nodes that were guards before.
35625 - Mask out all signals in sub-threads; only the libevent signal
35626 handler should be processing them. This should prevent some crashes
35627 on some machines using pthreads. (Patch from coderman.)
35628 - Fix switched arguments on memset in the implementation of
35629 tor_munmap() for systems with no mmap() call.
35630 - When Tor receives a router descriptor that it asked for, but
35631 no longer wants (because it has received fresh networkstatuses
35632 in the meantime), do not warn the user. Cache the descriptor if
35633 we're a cache; drop it if we aren't.
35634 - Make earlier entry guards _really_ get retried when the network
35636 - On a malformed DNS reply, always give an error to the corresponding
35638 - Build with recent libevents on platforms that do not define the
35639 nonstandard types "u_int8_t" and friends.
35641 o Minor features (controller):
35642 - Warn the user when an application uses the obsolete binary v0
35643 control protocol. We're planning to remove support for it during
35644 the next development series, so it's good to give people some
35646 - Add STREAM_BW events to report per-entry-stream bandwidth
35647 use. (Patch from Robert Hogan.)
35648 - Rate-limit SIGNEWNYM signals in response to controllers that
35649 impolitely generate them for every single stream. (Patch from
35650 mwenge; closes bug 394.)
35651 - Make REMAP stream events have a SOURCE (cache or exit), and
35652 make them generated in every case where we get a successful
35653 connected or resolved cell.
35655 o Minor bugfixes (performance):
35656 - Call router_have_min_dir_info half as often. (This is showing up in
35657 some profiles, but not others.)
35658 - When using GCC, make log_debug never get called at all, and its
35659 arguments never get evaluated, when no debug logs are configured.
35660 (This is showing up in some profiles, but not others.)
35663 - Remove some never-implemented options. Mark PathlenCoinWeight as
35665 - Implement proposal 106: Stop requiring clients to have well-formed
35666 certificates; stop checking nicknames in certificates. (Clients
35667 have certificates so that they can look like Tor servers, but in
35668 the future we might want to allow them to look like regular TLS
35669 clients instead. Nicknames in certificates serve no purpose other
35670 than making our protocol easier to recognize on the wire.)
35671 - Revise messages on handshake failure again to be even more clear about
35672 which are incoming connections and which are outgoing.
35673 - Discard any v1 directory info that's over 1 month old (for
35674 directories) or over 1 week old (for running-routers lists).
35675 - Do not warn when individual nodes in the configuration's EntryNodes,
35676 ExitNodes, etc are down: warn only when all possible nodes
35677 are down. (Fixes bug 348.)
35678 - Always remove expired routers and networkstatus docs before checking
35679 whether we have enough information to build circuits. (Fixes
35681 - Put a lower-bound on MaxAdvertisedBandwidth.
35684 Changes in version 0.1.2.7-alpha - 2007-02-06
35685 o Major bugfixes (rate limiting):
35686 - Servers decline directory requests much more aggressively when
35687 they're low on bandwidth. Otherwise they end up queueing more and
35688 more directory responses, which can't be good for latency.
35689 - But never refuse directory requests from local addresses.
35690 - Fix a memory leak when sending a 503 response for a networkstatus
35692 - Be willing to read or write on local connections (e.g. controller
35693 connections) even when the global rate limiting buckets are empty.
35694 - If our system clock jumps back in time, don't publish a negative
35695 uptime in the descriptor. Also, don't let the global rate limiting
35696 buckets go absurdly negative.
35697 - Flush local controller connection buffers periodically as we're
35698 writing to them, so we avoid queueing 4+ megabytes of data before
35701 o Major bugfixes (NT services):
35702 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
35703 command-line flag so that admins can override the default by saying
35704 "tor --service install --user "SomeUser"". This will not affect
35705 existing installed services. Also, warn the user that the service
35706 will look for its configuration file in the service user's
35707 %appdata% directory. (We can't do the 'hardwire the user's appdata
35708 directory' trick any more, since we may not have read access to that
35711 o Major bugfixes (other):
35712 - Previously, we would cache up to 16 old networkstatus documents
35713 indefinitely, if they came from nontrusted authorities. Now we
35714 discard them if they are more than 10 days old.
35715 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
35717 - Detect and reject malformed DNS responses containing circular
35719 - If exits are rare enough that we're not marking exits as guards,
35720 ignore exit bandwidth when we're deciding the required bandwidth
35722 - When we're handling a directory connection tunneled over Tor,
35723 don't fill up internal memory buffers with all the data we want
35724 to tunnel; instead, only add it if the OR connection that will
35725 eventually receive it has some room for it. (This can lead to
35726 slowdowns in tunneled dir connections; a better solution will have
35727 to wait for 0.2.0.)
35729 o Minor bugfixes (dns):
35730 - Add some defensive programming to eventdns.c in an attempt to catch
35731 possible memory-stomping bugs.
35732 - Detect and reject DNS replies containing IPv4 or IPv6 records with
35733 an incorrect number of bytes. (Previously, we would ignore the
35735 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
35736 in the correct order, and doesn't crash.
35737 - Free memory held in recently-completed DNS lookup attempts on exit.
35738 This was not a memory leak, but may have been hiding memory leaks.
35739 - Handle TTL values correctly on reverse DNS lookups.
35740 - Treat failure to parse resolv.conf as an error.
35742 o Minor bugfixes (other):
35743 - Fix crash with "tor --list-fingerprint" (reported by seeess).
35744 - When computing clock skew from directory HTTP headers, consider what
35745 time it was when we finished asking for the directory, not what
35747 - Expire socks connections if they spend too long waiting for the
35748 handshake to finish. Previously we would let them sit around for
35749 days, if the connecting application didn't close them either.
35750 - And if the socks handshake hasn't started, don't send a
35751 "DNS resolve socks failed" handshake reply; just close it.
35752 - Stop using C functions that OpenBSD's linker doesn't like.
35753 - Don't launch requests for descriptors unless we have networkstatuses
35754 from at least half of the authorities. This delays the first
35755 download slightly under pathological circumstances, but can prevent
35756 us from downloading a bunch of descriptors we don't need.
35757 - Do not log IPs with TLS failures for incoming TLS
35758 connections. (Fixes bug 382.)
35759 - If the user asks to use invalid exit nodes, be willing to use
35761 - Stop using the reserved ac_cv namespace in our configure script.
35762 - Call stat() slightly less often; use fstat() when possible.
35763 - Refactor the way we handle pending circuits when an OR connection
35764 completes or fails, in an attempt to fix a rare crash bug.
35765 - Only rewrite a conn's address based on X-Forwarded-For: headers
35766 if it's a parseable public IP address; and stop adding extra quotes
35767 to the resulting address.
35770 - Weight directory requests by advertised bandwidth. Now we can
35771 let servers enable write limiting but still allow most clients to
35772 succeed at their directory requests. (We still ignore weights when
35773 choosing a directory authority; I hope this is a feature.)
35776 - Create a new file ReleaseNotes which was the old ChangeLog. The
35777 new ChangeLog file now includes the summaries for all development
35779 - Check for addresses with invalid characters at the exit as well
35780 as at the client, and warn less verbosely when they fail. You can
35781 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
35782 - Adapt a patch from goodell to let the contrib/exitlist script
35783 take arguments rather than require direct editing.
35784 - Inform the server operator when we decide not to advertise a
35785 DirPort due to AccountingMax enabled or a low BandwidthRate. It
35786 was confusing Zax, so now we're hopefully more helpful.
35787 - Bring us one step closer to being able to establish an encrypted
35788 directory tunnel without knowing a descriptor first. Still not
35789 ready yet. As part of the change, now assume we can use a
35790 create_fast cell if we don't know anything about a router.
35791 - Allow exit nodes to use nameservers running on ports other than 53.
35792 - Servers now cache reverse DNS replies.
35793 - Add an --ignore-missing-torrc command-line option so that we can
35794 get the "use sensible defaults if the configuration file doesn't
35795 exist" behavior even when specifying a torrc location on the command
35798 o Minor features (controller):
35799 - Track reasons for OR connection failure; make these reasons
35800 available via the controller interface. (Patch from Mike Perry.)
35801 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
35802 can learn when clients are sending malformed hostnames to Tor.
35803 - Clean up documentation for controller status events.
35804 - Add a REMAP status to stream events to note that a stream's
35805 address has changed because of a cached address or a MapAddress
35809 Changes in version 0.1.2.6-alpha - 2007-01-09
35811 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
35812 connection handles more than 4 gigs in either direction, we crash.
35813 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
35814 advertised exit node, somebody might try to exit from us when
35815 we're bootstrapping and before we've built our descriptor yet.
35816 Refuse the connection rather than crashing.
35819 - Warn if we (as a server) find that we've resolved an address that we
35820 weren't planning to resolve.
35821 - Warn that using select() on any libevent version before 1.1 will be
35822 unnecessarily slow (even for select()).
35823 - Flush ERR-level controller status events just like we currently
35824 flush ERR-level log events, so that a Tor shutdown doesn't prevent
35825 the controller from learning about current events.
35827 o Minor features (more controller status events):
35828 - Implement EXTERNAL_ADDRESS server status event so controllers can
35829 learn when our address changes.
35830 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
35831 can learn when directories reject our descriptor.
35832 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
35833 can learn when a client application is speaking a non-socks protocol
35835 - Implement DANGEROUS_SOCKS client status event so controllers
35836 can learn when a client application is leaking DNS addresses.
35837 - Implement BUG general status event so controllers can learn when
35838 Tor is unhappy about its internal invariants.
35839 - Implement CLOCK_SKEW general status event so controllers can learn
35840 when Tor thinks the system clock is set incorrectly.
35841 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
35842 server status events so controllers can learn when their descriptors
35843 are accepted by a directory.
35844 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
35845 server status events so controllers can learn about Tor's progress in
35846 deciding whether it's reachable from the outside.
35847 - Implement BAD_LIBEVENT general status event so controllers can learn
35848 when we have a version/method combination in libevent that needs to
35850 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
35851 and DNS_USELESS server status events so controllers can learn
35852 about changes to DNS server status.
35854 o Minor features (directory):
35855 - Authorities no longer recommend exits as guards if this would shift
35856 too much load to the exit nodes.
35859 Changes in version 0.1.2.5-alpha - 2007-01-06
35861 - Enable write limiting as well as read limiting. Now we sacrifice
35862 capacity if we're pushing out lots of directory traffic, rather
35863 than overrunning the user's intended bandwidth limits.
35864 - Include TLS overhead when counting bandwidth usage; previously, we
35865 would count only the bytes sent over TLS, but not the bytes used
35867 - Support running the Tor service with a torrc not in the same
35868 directory as tor.exe and default to using the torrc located in
35869 the %appdata%\Tor\ of the user who installed the service. Patch
35871 - Servers now check for the case when common DNS requests are going to
35872 wildcarded addresses (i.e. all getting the same answer), and change
35873 their exit policy to reject *:* if it's happening.
35874 - Implement BEGIN_DIR cells, so we can connect to the directory
35875 server via TLS to do encrypted directory requests rather than
35876 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
35877 config options if you like.
35879 o Minor features (config and docs):
35880 - Start using the state file to store bandwidth accounting data:
35881 the bw_accounting file is now obsolete. We'll keep generating it
35882 for a while for people who are still using 0.1.2.4-alpha.
35883 - Try to batch changes to the state file so that we do as few
35884 disk writes as possible while still storing important things in
35886 - The state file and the bw_accounting file get saved less often when
35887 the AvoidDiskWrites config option is set.
35888 - Make PIDFile work on Windows (untested).
35889 - Add internal descriptions for a bunch of configuration options:
35890 accessible via controller interface and in comments in saved
35892 - Reject *:563 (NNTPS) in the default exit policy. We already reject
35893 NNTP by default, so this seems like a sensible addition.
35894 - Clients now reject hostnames with invalid characters. This should
35895 avoid some inadvertent info leaks. Add an option
35896 AllowNonRFC953Hostnames to disable this behavior, in case somebody
35897 is running a private network with hosts called @, !, and #.
35898 - Add a maintainer script to tell us which options are missing
35899 documentation: "make check-docs".
35900 - Add a new address-spec.txt document to describe our special-case
35901 addresses: .exit, .onion, and .noconnnect.
35903 o Minor features (DNS):
35904 - Ongoing work on eventdns infrastructure: now it has dns server
35905 and ipv6 support. One day Tor will make use of it.
35906 - Add client-side caching for reverse DNS lookups.
35907 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
35908 - When we change nameservers or IP addresses, reset and re-launch
35909 our tests for DNS hijacking.
35911 o Minor features (directory):
35912 - Authorities now specify server versions in networkstatus. This adds
35913 about 2% to the size of compressed networkstatus docs, and allows
35914 clients to tell which servers support BEGIN_DIR and which don't.
35915 The implementation is forward-compatible with a proposed future
35916 protocol version scheme not tied to Tor versions.
35917 - DirServer configuration lines now have an orport= option so
35918 clients can open encrypted tunnels to the authorities without
35919 having downloaded their descriptors yet. Enabled for moria1,
35920 moria2, tor26, and lefkada now in the default configuration.
35921 - Directory servers are more willing to send a 503 "busy" if they
35922 are near their write limit, especially for v1 directory requests.
35923 Now they can use their limited bandwidth for actual Tor traffic.
35924 - Clients track responses with status 503 from dirservers. After a
35925 dirserver has given us a 503, we try not to use it until an hour has
35926 gone by, or until we have no dirservers that haven't given us a 503.
35927 - When we get a 503 from a directory, and we're not a server, we don't
35928 count the failure against the total number of failures allowed
35929 for the thing we're trying to download.
35930 - Report X-Your-Address-Is correctly from tunneled directory
35931 connections; don't report X-Your-Address-Is when it's an internal
35932 address; and never believe reported remote addresses when they're
35934 - Protect against an unlikely DoS attack on directory servers.
35935 - Add a BadDirectory flag to network status docs so that authorities
35936 can (eventually) tell clients about caches they believe to be
35939 o Minor features (controller):
35940 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
35941 - Reimplement GETINFO so that info/names stays in sync with the
35943 - Implement "GETINFO fingerprint".
35944 - Implement "SETEVENTS GUARD" so controllers can get updates on
35945 entry guard status as it changes.
35947 o Minor features (clean up obsolete pieces):
35948 - Remove some options that have been deprecated since at least
35949 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
35950 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
35951 to set log options.
35952 - We no longer look for identity and onion keys in "identity.key" and
35953 "onion.key" -- these were replaced by secret_id_key and
35954 secret_onion_key in 0.0.8pre1.
35955 - We no longer require unrecognized directory entries to be
35958 o Major bugfixes (security):
35959 - Stop sending the HttpProxyAuthenticator string to directory
35960 servers when directory connections are tunnelled through Tor.
35961 - Clients no longer store bandwidth history in the state file.
35962 - Do not log introduction points for hidden services if SafeLogging
35964 - When generating bandwidth history, round down to the nearest
35965 1k. When storing accounting data, round up to the nearest 1k.
35966 - When we're running as a server, remember when we last rotated onion
35967 keys, so that we will rotate keys once they're a week old even if
35968 we never stay up for a week ourselves.
35970 o Major bugfixes (other):
35971 - Fix a longstanding bug in eventdns that prevented the count of
35972 timed-out resolves from ever being reset. This bug caused us to
35973 give up on a nameserver the third time it timed out, and try it
35974 10 seconds later... and to give up on it every time it timed out
35976 - Take out the '5 second' timeout from the connection retry
35977 schedule. Now the first connect attempt will wait a full 10
35978 seconds before switching to a new circuit. Perhaps this will help
35979 a lot. Based on observations from Mike Perry.
35980 - Fix a bug on the Windows implementation of tor_mmap_file() that
35981 would prevent the cached-routers file from ever loading. Reported
35985 - Fix an assert failure when a directory authority sets
35986 AuthDirRejectUnlisted and then receives a descriptor from an
35987 unlisted router. Reported by seeess.
35988 - Avoid a double-free when parsing malformed DirServer lines.
35989 - Fix a bug when a BSD-style PF socket is first used. Patch from
35991 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
35992 to resolve an address at a given exit node even when they ask for
35994 - Servers no longer ever list themselves in their "family" line,
35995 even if configured to do so. This makes it easier to configure
35996 family lists conveniently.
35997 - When running as a server, don't fall back to 127.0.0.1 when no
35998 nameservers are configured in /etc/resolv.conf; instead, make the
35999 user fix resolv.conf or specify nameservers explicitly. (Resolves
36001 - Stop accepting certain malformed ports in configured exit policies.
36002 - Don't re-write the fingerprint file every restart, unless it has
36004 - Stop warning when a single nameserver fails: only warn when _all_ of
36005 our nameservers have failed. Also, when we only have one nameserver,
36006 raise the threshold for deciding that the nameserver is dead.
36007 - Directory authorities now only decide that routers are reachable
36008 if their identity keys are as expected.
36009 - When the user uses bad syntax in the Log config line, stop
36010 suggesting other bad syntax as a replacement.
36011 - Correctly detect ipv6 DNS capability on OpenBSD.
36013 o Minor bugfixes (controller):
36014 - Report the circuit number correctly in STREAM CLOSED events. Bug
36015 reported by Mike Perry.
36016 - Do not report bizarre values for results of accounting GETINFOs
36017 when the last second's write or read exceeds the allotted bandwidth.
36018 - Report "unrecognized key" rather than an empty string when the
36019 controller tries to fetch a networkstatus that doesn't exist.
36022 Changes in version 0.1.1.26 - 2006-12-14
36023 o Security bugfixes:
36024 - Stop sending the HttpProxyAuthenticator string to directory
36025 servers when directory connections are tunnelled through Tor.
36026 - Clients no longer store bandwidth history in the state file.
36027 - Do not log introduction points for hidden services if SafeLogging
36031 - Fix an assert failure when a directory authority sets
36032 AuthDirRejectUnlisted and then receives a descriptor from an
36033 unlisted router (reported by seeess).
36036 Changes in version 0.1.2.4-alpha - 2006-12-03
36038 - Add support for using natd; this allows FreeBSDs earlier than
36039 5.1.2 to have ipfw send connections through Tor without using
36040 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
36043 - Make all connections to addresses of the form ".noconnect"
36044 immediately get closed. This lets application/controller combos
36045 successfully test whether they're talking to the same Tor by
36046 watching for STREAM events.
36047 - Make cross.sh cross-compilation script work even when autogen.sh
36048 hasn't been run. (Patch from Michael Mohr.)
36049 - Statistics dumped by -USR2 now include a breakdown of public key
36050 operations, for profiling.
36053 - Fix a major leak when directory authorities parse their
36054 approved-routers list, a minor memory leak when we fail to pick
36055 an exit node, and a few rare leaks on errors.
36056 - Handle TransPort connections even when the server sends data before
36057 the client sends data. Previously, the connection would just hang
36058 until the client sent data. (Patch from tup based on patch from
36060 - Avoid assert failure when our cached-routers file is empty on
36064 - Don't log spurious warnings when we see a circuit close reason we
36065 don't recognize; it's probably just from a newer version of Tor.
36066 - Have directory authorities allow larger amounts of drift in uptime
36067 without replacing the server descriptor: previously, a server that
36068 restarted every 30 minutes could have 48 "interesting" descriptors
36070 - Start linking to the Tor specification and Tor reference manual
36071 correctly in the Windows installer.
36072 - Add Vidalia to the OS X uninstaller script, so when we uninstall
36073 Tor/Privoxy we also uninstall Vidalia.
36074 - Resume building on Irix64, and fix a lot of warnings from its
36075 MIPSpro C compiler.
36076 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
36077 when we're running as a client.
36080 Changes in version 0.1.1.25 - 2006-11-04
36082 - When a client asks us to resolve (rather than connect to)
36083 an address, and we have a cached answer, give them the cached
36084 answer. Previously, we would give them no answer at all.
36085 - We were building exactly the wrong circuits when we predict
36086 hidden service requirements, meaning Tor would have to build all
36087 its circuits on demand.
36088 - If none of our live entry guards have a high uptime, but we
36089 require a guard with a high uptime, try adding a new guard before
36090 we give up on the requirement. This patch should make long-lived
36091 connections more stable on average.
36092 - When testing reachability of our DirPort, don't launch new
36093 tests when there's already one in progress -- unreachable
36094 servers were stacking up dozens of testing streams.
36096 o Security bugfixes:
36097 - When the user sends a NEWNYM signal, clear the client-side DNS
36098 cache too. Otherwise we continue to act on previous information.
36101 - Avoid a memory corruption bug when creating a hash table for
36103 - Avoid possibility of controller-triggered crash when misusing
36104 certain commands from a v0 controller on platforms that do not
36105 handle printf("%s",NULL) gracefully.
36106 - Avoid infinite loop on unexpected controller input.
36107 - Don't log spurious warnings when we see a circuit close reason we
36108 don't recognize; it's probably just from a newer version of Tor.
36109 - Add Vidalia to the OS X uninstaller script, so when we uninstall
36110 Tor/Privoxy we also uninstall Vidalia.
36113 Changes in version 0.1.2.3-alpha - 2006-10-29
36115 - Prepare for servers to publish descriptors less often: never
36116 discard a descriptor simply for being too old until either it is
36117 recommended by no authorities, or until we get a better one for
36118 the same router. Make caches consider retaining old recommended
36119 routers for even longer.
36120 - If most authorities set a BadExit flag for a server, clients
36121 don't think of it as a general-purpose exit. Clients only consider
36122 authorities that advertise themselves as listing bad exits.
36123 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
36124 headers for content, so that we can work better in the presence of
36125 caching HTTP proxies.
36126 - Allow authorities to list nodes as bad exits by fingerprint or by
36129 o Minor features, controller:
36130 - Add a REASON field to CIRC events; for backward compatibility, this
36131 field is sent only to controllers that have enabled the extended
36132 event format. Also, add additional reason codes to explain why
36133 a given circuit has been destroyed or truncated. (Patches from
36135 - Add a REMOTE_REASON field to extended CIRC events to tell the
36136 controller about why a remote OR told us to close a circuit.
36137 - Stream events also now have REASON and REMOTE_REASON fields,
36138 working much like those for circuit events.
36139 - There's now a GETINFO ns/... field so that controllers can ask Tor
36140 about the current status of a router.
36141 - A new event type "NS" to inform a controller when our opinion of
36142 a router's status has changed.
36143 - Add a GETINFO events/names and GETINFO features/names so controllers
36144 can tell which events and features are supported.
36145 - A new CLEARDNSCACHE signal to allow controllers to clear the
36146 client-side DNS cache without expiring circuits.
36148 o Security bugfixes:
36149 - When the user sends a NEWNYM signal, clear the client-side DNS
36150 cache too. Otherwise we continue to act on previous information.
36153 - Avoid sending junk to controllers or segfaulting when a controller
36154 uses EVENT_NEW_DESC with verbose nicknames.
36155 - Stop triggering asserts if the controller tries to extend hidden
36156 service circuits (reported by mwenge).
36157 - Avoid infinite loop on unexpected controller input.
36158 - When the controller does a "GETINFO network-status", tell it
36159 about even those routers whose descriptors are very old, and use
36160 long nicknames where appropriate.
36161 - Change NT service functions to be loaded on demand. This lets us
36162 build with MinGW without breaking Tor for Windows 98 users.
36163 - Do DirPort reachability tests less often, since a single test
36164 chews through many circuits before giving up.
36165 - In the hidden service example in torrc.sample, stop recommending
36166 esoteric and discouraged hidden service options.
36167 - When stopping an NT service, wait up to 10 sec for it to actually
36168 stop. Patch from Matt Edman; resolves bug 295.
36169 - Fix handling of verbose nicknames with ORCONN controller events:
36170 make them show up exactly when requested, rather than exactly when
36172 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
36173 printing a duplicate "$" in the keys we send (reported by mwenge).
36174 - Correctly set maximum connection limit on Cygwin. (This time
36176 - Try to detect Windows correctly when cross-compiling.
36177 - Detect the size of the routers file correctly even if it is
36178 corrupted (on systems without mmap) or not page-aligned (on systems
36179 with mmap). This bug was harmless.
36180 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
36181 to open a stream fails; now we do in more cases. This should
36182 make clients able to find a good exit faster in some cases, since
36183 unhandleable requests will now get an error rather than timing out.
36184 - Resolve two memory leaks when rebuilding the on-disk router cache
36185 (reported by fookoowa).
36186 - Clean up minor code warnings suggested by the MIPSpro C compiler,
36187 and reported by some Centos users.
36188 - Controller signals now work on non-Unix platforms that don't define
36189 SIGUSR1 and SIGUSR2 the way we expect.
36190 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
36191 values before failing, and always enables eventdns.
36192 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
36193 Try to fix this in configure.in by checking for most functions
36194 before we check for libevent.
36197 Changes in version 0.1.2.2-alpha - 2006-10-07
36199 - Make our async eventdns library on-by-default for Tor servers,
36200 and plan to deprecate the separate dnsworker threads.
36201 - Add server-side support for "reverse" DNS lookups (using PTR
36202 records so clients can determine the canonical hostname for a given
36203 IPv4 address). Only supported by servers using eventdns; servers
36204 now announce in their descriptors whether they support eventdns.
36205 - Specify and implement client-side SOCKS5 interface for reverse DNS
36206 lookups (see doc/socks-extensions.txt).
36207 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
36208 connect to directory servers through Tor. Previously, clients needed
36209 to find Tor exits to make private connections to directory servers.
36210 - Avoid choosing Exit nodes for entry or middle hops when the
36211 total bandwidth available from non-Exit nodes is much higher than
36212 the total bandwidth available from Exit nodes.
36213 - Workaround for name servers (like Earthlink's) that hijack failing
36214 DNS requests and replace the no-such-server answer with a "helpful"
36215 redirect to an advertising-driven search portal. Also work around
36216 DNS hijackers who "helpfully" decline to hijack known-invalid
36217 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
36218 lets you turn it off.
36219 - Send out a burst of long-range padding cells once we've established
36220 that we're reachable. Spread them over 4 circuits, so hopefully
36221 a few will be fast. This exercises our bandwidth and bootstraps
36222 us into the directory more quickly.
36224 o New/improved config options:
36225 - Add new config option "ResolvConf" to let the server operator
36226 choose an alternate resolve.conf file when using eventdns.
36227 - Add an "EnforceDistinctSubnets" option to control our "exclude
36228 servers on the same /16" behavior. It's still on by default; this
36229 is mostly for people who want to operate private test networks with
36230 all the machines on the same subnet.
36231 - If one of our entry guards is on the ExcludeNodes list, or the
36232 directory authorities don't think it's a good guard, treat it as
36233 if it were unlisted: stop using it as a guard, and throw it off
36234 the guards list if it stays that way for a long time.
36235 - Allow directory authorities to be marked separately as authorities
36236 for the v1 directory protocol, the v2 directory protocol, and
36237 as hidden service directories, to make it easier to retire old
36238 authorities. V1 authorities should set "HSAuthoritativeDir 1"
36239 to continue being hidden service authorities too.
36240 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
36242 o Minor features, controller:
36243 - Fix CIRC controller events so that controllers can learn the
36244 identity digests of non-Named servers used in circuit paths.
36245 - Let controllers ask for more useful identifiers for servers. Instead
36246 of learning identity digests for un-Named servers and nicknames
36247 for Named servers, the new identifiers include digest, nickname,
36248 and indication of Named status. Off by default; see control-spec.txt
36249 for more information.
36250 - Add a "getinfo address" controller command so it can display Tor's
36251 best guess to the user.
36252 - New controller event to alert the controller when our server
36253 descriptor has changed.
36254 - Give more meaningful errors on controller authentication failure.
36256 o Minor features, other:
36257 - When asked to resolve a hostname, don't use non-exit servers unless
36258 requested to do so. This allows servers with broken DNS to be
36259 useful to the network.
36260 - Divide eventdns log messages into warn and info messages.
36261 - Reserve the nickname "Unnamed" for routers that can't pick
36262 a hostname: any router can call itself Unnamed; directory
36263 authorities will never allocate Unnamed to any particular router;
36264 clients won't believe that any router is the canonical Unnamed.
36265 - Only include function names in log messages for info/debug messages.
36266 For notice/warn/err, the content of the message should be clear on
36267 its own, and printing the function name only confuses users.
36268 - Avoid some false positives during reachability testing: don't try
36269 to test via a server that's on the same /24 as us.
36270 - If we fail to build a circuit to an intended enclave, and it's
36271 not mandatory that we use that enclave, stop wanting it.
36272 - When eventdns is enabled, allow multithreaded builds on NetBSD and
36273 OpenBSD. (We had previously disabled threads on these platforms
36274 because they didn't have working thread-safe resolver functions.)
36276 o Major bugfixes, anonymity/security:
36277 - If a client asked for a server by name, and there's a named server
36278 in our network-status but we don't have its descriptor yet, we
36279 could return an unnamed server instead.
36280 - Fix NetBSD bug that could allow someone to force uninitialized RAM
36281 to be sent to a server's DNS resolver. This only affects NetBSD
36282 and other platforms that do not bounds-check tolower().
36283 - Reject (most) attempts to use Tor circuits with length one. (If
36284 many people start using Tor as a one-hop proxy, exit nodes become
36285 a more attractive target for compromise.)
36286 - Just because your DirPort is open doesn't mean people should be
36287 able to remotely teach you about hidden service descriptors. Now
36288 only accept rendezvous posts if you've got HSAuthoritativeDir set.
36290 o Major bugfixes, other:
36291 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
36292 - When a client asks the server to resolve (not connect to)
36293 an address, and it has a cached answer, give them the cached answer.
36294 Previously, the server would give them no answer at all.
36295 - Allow really slow clients to not hang up five minutes into their
36296 directory downloads (suggested by Adam J. Richter).
36297 - We were building exactly the wrong circuits when we anticipated
36298 hidden service requirements, meaning Tor would have to build all
36299 its circuits on demand.
36300 - Avoid crashing when we mmap a router cache file of size 0.
36301 - When testing reachability of our DirPort, don't launch new
36302 tests when there's already one in progress -- unreachable
36303 servers were stacking up dozens of testing streams.
36305 o Minor bugfixes, correctness:
36306 - If we're a directory mirror and we ask for "all" network status
36307 documents, we would discard status documents from authorities
36308 we don't recognize.
36309 - Avoid a memory corruption bug when creating a hash table for
36311 - Avoid controller-triggered crash when misusing certain commands
36312 from a v0 controller on platforms that do not handle
36313 printf("%s",NULL) gracefully.
36314 - Don't crash when a controller sends a third argument to an
36315 "extendcircuit" request.
36316 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
36317 response; fix error code when "getinfo dir/status/" fails.
36318 - Avoid crash when telling controller stream-status and a stream
36320 - Patch from Adam Langley to fix assert() in eventdns.c.
36321 - Fix a debug log message in eventdns to say "X resolved to Y"
36322 instead of "X resolved to X".
36323 - Make eventdns give strings for DNS errors, not just error numbers.
36324 - Track unreachable entry guards correctly: don't conflate
36325 'unreachable by us right now' with 'listed as down by the directory
36326 authorities'. With the old code, if a guard was unreachable by
36327 us but listed as running, it would clog our guard list forever.
36328 - Behave correctly in case we ever have a network with more than
36329 2GB/s total advertised capacity.
36330 - Make TrackExitHosts case-insensitive, and fix the behavior of
36331 ".suffix" TrackExitHosts items to avoid matching in the middle of
36333 - Finally fix the openssl warnings from newer gccs that believe that
36334 ignoring a return value is okay, but casting a return value and
36335 then ignoring it is a sign of madness.
36336 - Prevent the contrib/exitlist script from printing the same
36337 result more than once.
36338 - Patch from Steve Hildrey: Generate network status correctly on
36339 non-versioning dirservers.
36340 - Don't listen to the X-Your-Address-Is hint if you did the lookup
36341 via Tor; otherwise you'll think you're the exit node's IP address.
36343 o Minor bugfixes, performance:
36344 - Two small performance improvements on parsing descriptors.
36345 - Major performance improvement on inserting descriptors: change
36346 algorithm from O(n^2) to O(n).
36347 - Make the common memory allocation path faster on machines where
36348 malloc(0) returns a pointer.
36349 - Start remembering X-Your-Address-Is directory hints even if you're
36350 a client, so you can become a server more smoothly.
36351 - Avoid duplicate entries on MyFamily line in server descriptor.
36353 o Packaging, features:
36354 - Remove architecture from OS X builds. The official builds are
36355 now universal binaries.
36356 - The Debian package now uses --verify-config when (re)starting,
36357 to distinguish configuration errors from other errors.
36358 - Update RPMs to require libevent 1.1b.
36360 o Packaging, bugfixes:
36361 - Patches so Tor builds with MinGW on Windows.
36362 - Patches so Tor might run on Cygwin again.
36363 - Resume building on non-gcc compilers and ancient gcc. Resume
36364 building with the -O0 compile flag. Resume building cleanly on
36366 - Run correctly on OS X platforms with case-sensitive filesystems.
36367 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
36368 - Add autoconf checks so Tor can build on Solaris x86 again.
36371 - Documented (and renamed) ServerDNSSearchDomains and
36372 ServerDNSResolvConfFile options.
36373 - Be clearer that the *ListenAddress directives can be repeated
36377 Changes in version 0.1.1.24 - 2006-09-29
36379 - Allow really slow clients to not hang up five minutes into their
36380 directory downloads (suggested by Adam J. Richter).
36381 - Fix major performance regression from 0.1.0.x: instead of checking
36382 whether we have enough directory information every time we want to
36383 do something, only check when the directory information has changed.
36384 This should improve client CPU usage by 25-50%.
36385 - Don't crash if, after a server has been running for a while,
36386 it can't resolve its hostname.
36389 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36390 - Don't crash when the controller receives a third argument to an
36391 "extendcircuit" request.
36392 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
36393 response; fix error code when "getinfo dir/status/" fails.
36394 - Fix configure.in to not produce broken configure files with
36395 more recent versions of autoconf. Thanks to Clint for his auto*
36397 - Fix security bug on NetBSD that could allow someone to force
36398 uninitialized RAM to be sent to a server's DNS resolver. This
36399 only affects NetBSD and other platforms that do not bounds-check
36401 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
36402 methods: these are known to be buggy.
36403 - If we're a directory mirror and we ask for "all" network status
36404 documents, we would discard status documents from authorities
36405 we don't recognize.
36408 Changes in version 0.1.2.1-alpha - 2006-08-27
36410 - Add "eventdns" async dns library from Adam Langley, tweaked to
36411 build on OSX and Windows. Only enabled if you pass the
36412 --enable-eventdns argument to configure.
36413 - Allow servers with no hostname or IP address to learn their
36414 IP address by asking the directory authorities. This code only
36415 kicks in when you would normally have exited with a "no address"
36416 error. Nothing's authenticated, so use with care.
36417 - Rather than waiting a fixed amount of time between retrying
36418 application connections, we wait only 5 seconds for the first,
36419 10 seconds for the second, and 15 seconds for each retry after
36420 that. Hopefully this will improve the expected user experience.
36421 - Patch from Tup to add support for transparent AP connections:
36422 this basically bundles the functionality of trans-proxy-tor
36423 into the Tor mainline. Now hosts with compliant pf/netfilter
36424 implementations can redirect TCP connections straight to Tor
36425 without diverting through SOCKS. Needs docs.
36426 - Busy directory servers save lots of memory by spooling server
36427 descriptors, v1 directories, and v2 networkstatus docs to buffers
36428 as needed rather than en masse. Also mmap the cached-routers
36429 files, so we don't need to keep the whole thing in memory too.
36430 - Automatically avoid picking more than one node from the same
36431 /16 network when constructing a circuit.
36432 - Revise and clean up the torrc.sample that we ship with; add
36433 a section for BandwidthRate and BandwidthBurst.
36436 - Split circuit_t into origin_circuit_t and or_circuit_t, and
36437 split connection_t into edge, or, dir, control, and base structs.
36438 These will save quite a bit of memory on busy servers, and they'll
36439 also help us track down bugs in the code and bugs in the spec.
36440 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
36441 or later. Log when we are doing this, so we can diagnose it when
36442 it fails. (Also, recommend libevent 1.1b for kqueue and
36443 win32 methods; deprecate libevent 1.0b harder; make libevent
36444 recommendation system saner.)
36445 - Start being able to build universal binaries on OS X (thanks
36447 - Export the default exit policy via the control port, so controllers
36448 don't need to guess what it is / will be later.
36449 - Add a man page entry for ProtocolWarnings.
36450 - Add TestVia config option to the man page.
36451 - Remove even more protocol-related warnings from Tor server logs,
36452 such as bad TLS handshakes and malformed begin cells.
36453 - Stop fetching descriptors if you're not a dir mirror and you
36454 haven't tried to establish any circuits lately. [This currently
36455 causes some dangerous behavior, because when you start up again
36456 you'll use your ancient server descriptors.]
36457 - New DirPort behavior: if you have your dirport set, you download
36458 descriptors aggressively like a directory mirror, whether or not
36459 your ORPort is set.
36460 - Get rid of the router_retry_connections notion. Now routers
36461 no longer try to rebuild long-term connections to directory
36462 authorities, and directory authorities no longer try to rebuild
36463 long-term connections to all servers. We still don't hang up
36464 connections in these two cases though -- we need to look at it
36465 more carefully to avoid flapping, and we likely need to wait til
36466 0.1.1.x is obsolete.
36467 - Drop compatibility with obsolete Tors that permit create cells
36468 to have the wrong circ_id_type.
36469 - Re-enable per-connection rate limiting. Get rid of the "OP
36470 bandwidth" concept. Lay groundwork for "bandwidth classes" --
36471 separate global buckets that apply depending on what sort of conn
36473 - Start publishing one minute or so after we find our ORPort
36474 to be reachable. This will help reduce the number of descriptors
36475 we have for ourselves floating around, since it's quite likely
36476 other things (e.g. DirPort) will change during that minute too.
36477 - Fork the v1 directory protocol into its own spec document,
36478 and mark dir-spec.txt as the currently correct (v2) spec.
36481 - When we find our DirPort to be reachable, publish a new descriptor
36482 so we'll tell the world (reported by pnx).
36483 - Publish a new descriptor after we hup/reload. This is important
36484 if our config has changed such that we'll want to start advertising
36485 our DirPort now, etc.
36486 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36487 - When we have a state file we cannot parse, tell the user and
36488 move it aside. Now we avoid situations where the user starts
36489 Tor in 1904, Tor writes a state file with that timestamp in it,
36490 the user fixes her clock, and Tor refuses to start.
36491 - Fix configure.in to not produce broken configure files with
36492 more recent versions of autoconf. Thanks to Clint for his auto*
36494 - "tor --verify-config" now exits with -1(255) or 0 depending on
36495 whether the config options are bad or good.
36496 - Resolve bug 321 when using dnsworkers: append a period to every
36497 address we resolve at the exit node, so that we do not accidentally
36498 pick up local addresses, and so that failing searches are retried
36499 in the resolver search domains. (This is already solved for
36500 eventdns.) (This breaks Blossom servers for now.)
36501 - If we are using an exit enclave and we can't connect, e.g. because
36502 its webserver is misconfigured to not listen on localhost, then
36503 back off and try connecting from somewhere else before we fail.
36506 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
36507 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
36508 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
36509 when the IP address is mapped through MapAddress to a hostname.
36510 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
36511 useless IPv6 DNS resolves.
36512 - Patch suggested by Karsten Loesing: respond to SIGNAL command
36513 before we execute the signal, in case the signal shuts us down.
36514 - Clean up AllowInvalidNodes man page entry.
36515 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
36516 - Add more asserts to track down an assert error on a windows Tor
36517 server with connection_add being called with socket == -1.
36518 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
36519 - Fix misleading log messages: an entry guard that is "unlisted",
36520 as well as not known to be "down" (because we've never heard
36521 of it), is not therefore "up".
36522 - Remove code to special-case "-cvs" ending, since it has not
36523 actually mattered since 0.0.9.
36524 - Make our socks5 handling more robust to broken socks clients:
36525 throw out everything waiting on the buffer in between socks
36526 handshake phases, since they can't possibly (so the theory
36527 goes) have predicted what we plan to respond to them.
36530 Changes in version 0.1.1.23 - 2006-07-30
36532 - Fast Tor servers, especially exit nodes, were triggering asserts
36533 due to a bug in handling the list of pending DNS resolves. Some
36534 bugs still remain here; we're hunting them.
36535 - Entry guards could crash clients by sending unexpected input.
36536 - More fixes on reachability testing: if you find yourself reachable,
36537 then don't ever make any client requests (so you stop predicting
36538 circuits), then hup or have your clock jump, then later your IP
36539 changes, you won't think circuits are working, so you won't try to
36540 test reachability, so you won't publish.
36543 - Avoid a crash if the controller does a resetconf firewallports
36544 and then a setconf fascistfirewall=1.
36545 - Avoid an integer underflow when the dir authority decides whether
36546 a router is stable: we might wrongly label it stable, and compute
36547 a slightly wrong median stability, when a descriptor is published
36549 - Fix a place where we might trigger an assert if we can't build our
36550 own server descriptor yet.
36553 Changes in version 0.1.1.22 - 2006-07-05
36555 - Fix a big bug that was causing servers to not find themselves
36556 reachable if they changed IP addresses. Since only 0.1.1.22+
36557 servers can do reachability testing correctly, now we automatically
36558 make sure to test via one of these.
36559 - Fix to allow clients and mirrors to learn directory info from
36560 descriptor downloads that get cut off partway through.
36561 - Directory authorities had a bug in deciding if a newly published
36562 descriptor was novel enough to make everybody want a copy -- a few
36563 servers seem to be publishing new descriptors many times a minute.
36565 - Fix a rare bug that was causing some servers to complain about
36566 "closing wedged cpuworkers" and skip some circuit create requests.
36567 - Make the Exit flag in directory status documents actually work.
36570 Changes in version 0.1.1.21 - 2006-06-10
36571 o Crash and assert fixes from 0.1.1.20:
36572 - Fix a rare crash on Tor servers that have enabled hibernation.
36573 - Fix a seg fault on startup for Tor networks that use only one
36574 directory authority.
36575 - Fix an assert from a race condition that occurs on Tor servers
36576 while exiting, where various threads are trying to log that they're
36577 exiting, and delete the logs, at the same time.
36578 - Make our unit tests pass again on certain obscure platforms.
36581 - Add support for building SUSE RPM packages.
36582 - Speed up initial bootstrapping for clients: if we are making our
36583 first ever connection to any entry guard, then don't mark it down
36585 - When only one Tor server in the network is labelled as a guard,
36586 and we've already picked him, we would cycle endlessly picking him
36587 again, being unhappy about it, etc. Now we specifically exclude
36588 current guards when picking a new guard.
36589 - Servers send create cells more reliably after the TLS connection
36590 is established: we were sometimes forgetting to send half of them
36591 when we had more than one pending.
36592 - If we get a create cell that asks us to extend somewhere, but the
36593 Tor server there doesn't match the expected digest, we now send
36594 a destroy cell back, rather than silently doing nothing.
36595 - Make options->RedirectExit work again.
36596 - Make cookie authentication for the controller work again.
36597 - Stop being picky about unusual characters in the arguments to
36598 mapaddress. It's none of our business.
36599 - Add a new config option "TestVia" that lets you specify preferred
36600 middle hops to use for test circuits. Perhaps this will let me
36601 debug the reachability problems better.
36603 o Log / documentation fixes:
36604 - If we're a server and some peer has a broken TLS certificate, don't
36605 log about it unless ProtocolWarnings is set, i.e., we want to hear
36606 about protocol violations by others.
36607 - Fix spelling of VirtualAddrNetwork in man page.
36608 - Add a better explanation at the top of the autogenerated torrc file
36609 about what happened to our old torrc.
36612 Changes in version 0.1.1.20 - 2006-05-23
36614 - Downgrade a log severity where servers complain that they're
36616 - Avoid a compile warning on FreeBSD.
36617 - Remove string size limit on NEWDESC messages; solve bug 291.
36618 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
36619 more thoroughly when we're running on windows.
36622 Changes in version 0.1.1.19-rc - 2006-05-03
36624 - Regenerate our local descriptor if it's dirty and we try to use
36625 it locally (e.g. if it changes during reachability detection).
36626 - If we setconf our ORPort to 0, we continued to listen on the
36627 old ORPort and receive connections.
36628 - Avoid a second warning about machine/limits.h on Debian
36630 - Be willing to add our own routerinfo into the routerlist.
36631 Now authorities will include themselves in their directories
36632 and network-statuses.
36633 - Stop trying to upload rendezvous descriptors to every
36634 directory authority: only try the v1 authorities.
36635 - Servers no longer complain when they think they're not
36636 registered with the directory authorities. There were too many
36638 - Backport dist-rpm changes so rpms can be built without errors.
36641 - Implement an option, VirtualAddrMask, to set which addresses
36642 get handed out in response to mapaddress requests. This works
36643 around a bug in tsocks where 127.0.0.0/8 is never socksified.
36646 Changes in version 0.1.1.18-rc - 2006-04-10
36648 - Work harder to download live network-statuses from all the
36649 directory authorities we know about. Improve the threshold
36650 decision logic so we're more robust to edge cases.
36651 - When fetching rendezvous descriptors, we were willing to ask
36652 v2 authorities too, which would always return 404.
36655 - Stop listing down or invalid nodes in the v1 directory. This will
36656 reduce its bulk by about 1/3, and reduce load on directory
36658 - When deciding whether a router is Fast or Guard-worthy, consider
36659 his advertised BandwidthRate and not just the BandwidthCapacity.
36660 - No longer ship INSTALL and README files -- they are useless now.
36661 - Force rpmbuild to behave and honor target_cpu.
36662 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
36663 - Start to include translated versions of the tor-doc-*.html
36664 files, along with the screenshots. Still needs more work.
36665 - Start sending back 512 and 451 errors if mapaddress fails,
36666 rather than not sending anything back at all.
36667 - When we fail to bind or listen on an incoming or outgoing
36668 socket, we should close it before failing. otherwise we just
36669 leak it. (thanks to weasel for finding.)
36670 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
36671 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
36672 - Make NoPublish (even though deprecated) work again.
36673 - Fix a minor security flaw where a versioning auth dirserver
36674 could list a recommended version many times in a row to make
36675 clients more convinced that it's recommended.
36676 - Fix crash bug if there are two unregistered servers running
36677 with the same nickname, one of them is down, and you ask for
36678 them by nickname in your EntryNodes or ExitNodes. Also, try
36679 to pick the one that's running rather than an arbitrary one.
36680 - Fix an infinite loop we could hit if we go offline for too long.
36681 - Complain when we hit WSAENOBUFS on recv() or write() too.
36682 Perhaps this will help us hunt the bug.
36683 - If you're not a versioning dirserver, don't put the string
36684 "client-versions \nserver-versions \n" in your network-status.
36685 - Lower the minimum required number of file descriptors to 1000,
36686 so we can have some overhead for Valgrind on Linux, where the
36687 default ulimit -n is 1024.
36690 - Add tor.dizum.com as the fifth authoritative directory server.
36691 - Add a new config option FetchUselessDescriptors, off by default,
36692 for when you plan to run "exitlist" on your client and you want
36693 to know about even the non-running descriptors.
36696 Changes in version 0.1.1.17-rc - 2006-03-28
36698 - Clients and servers since 0.1.1.10-alpha have been expiring
36699 connections whenever they are idle for 5 minutes and they *do*
36700 have circuits on them. Oops. With this new version, clients will
36701 discard their previous entry guard choices and avoid choosing
36702 entry guards running these flawed versions.
36703 - Fix memory leak when uncompressing concatenated zlib streams. This
36704 was causing substantial leaks over time on Tor servers.
36705 - The v1 directory was including servers as much as 48 hours old,
36706 because that's how the new routerlist->routers works. Now only
36707 include them if they're 20 hours old or less.
36710 - Resume building on irix64, netbsd 2.0, etc.
36711 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
36713 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
36714 and it is confusing some users.
36715 - Mirrors stop caching the v1 directory so often.
36716 - Make the max number of old descriptors that a cache will hold
36717 rise with the number of directory authorities, so we can scale.
36718 - Change our win32 uname() hack to be more forgiving about what
36719 win32 versions it thinks it's found.
36722 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
36724 - When the controller's *setconf commands fail, collect an error
36725 message in a string and hand it back to the controller.
36726 - Make the v2 dir's "Fast" flag based on relative capacity, just
36727 like "Stable" is based on median uptime. Name everything in the
36728 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
36729 - Log server fingerprint on startup, so new server operators don't
36730 have to go hunting around their filesystem for it.
36731 - Return a robots.txt on our dirport to discourage google indexing.
36732 - Let the controller ask for GETINFO dir/status/foo so it can ask
36733 directly rather than connecting to the dir port. Only works when
36734 dirport is set for now.
36736 o New config options rather than constants in the code:
36737 - SocksTimeout: How long do we let a socks connection wait
36738 unattached before we fail it?
36739 - CircuitBuildTimeout: Cull non-open circuits that were born
36740 at least this many seconds ago.
36741 - CircuitIdleTimeout: Cull open clean circuits that were born
36742 at least this many seconds ago.
36745 Changes in version 0.1.1.16-rc - 2006-03-18
36746 o Bugfixes on 0.1.1.15-rc:
36747 - Fix assert when the controller asks to attachstream a connect-wait
36748 or resolve-wait stream.
36749 - Now do address rewriting when the controller asks us to attach
36750 to a particular circuit too. This will let Blossom specify
36751 "moria2.exit" without having to learn what moria2's IP address is.
36752 - Make the "tor --verify-config" command-line work again, so people
36753 can automatically check if their torrc will parse.
36754 - Authoritative dirservers no longer require an open connection from
36755 a server to consider him "reachable". We need this change because
36756 when we add new auth dirservers, old servers won't know not to
36758 - Let Tor build on Sun CC again.
36759 - Fix an off-by-one buffer size in dirserv.c that magically never
36760 hit our three authorities but broke sjmurdoch's own tor network.
36761 - If we as a directory mirror don't know of any v1 directory
36762 authorities, then don't try to cache any v1 directories.
36763 - Stop warning about unknown servers in our family when they are
36764 given as hex digests.
36765 - Stop complaining as quickly to the server operator that he
36766 hasn't registered his nickname/key binding.
36767 - Various cleanups so we can add new V2 Auth Dirservers.
36768 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
36769 reflect the updated flags in our v2 dir protocol.
36770 - Resume allowing non-printable characters for exit streams (both
36771 for connecting and for resolving). Now we tolerate applications
36772 that don't follow the RFCs. But continue to block malformed names
36775 o Bugfixes on 0.1.0.x:
36776 - Fix assert bug in close_logs(): when we close and delete logs,
36777 remove them all from the global "logfiles" list.
36778 - Fix minor integer overflow in calculating when we expect to use up
36779 our bandwidth allocation before hibernating.
36780 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
36781 there are multiple SSLs installed with different versions.
36782 - When we try to be a server and Address is not explicitly set and
36783 our hostname resolves to a private IP address, try to use an
36784 interface address if it has a public address. Now Windows machines
36785 that think of themselves as localhost can work by default.
36788 - Let the controller ask for GETINFO dir/server/foo so it can ask
36789 directly rather than connecting to the dir port.
36790 - Let the controller tell us about certain router descriptors
36791 that it doesn't want Tor to use in circuits. Implement
36792 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
36793 - New config option SafeSocks to reject all application connections
36794 using unsafe socks protocols. Defaults to off.
36797 Changes in version 0.1.1.15-rc - 2006-03-11
36798 o Bugfixes and cleanups:
36799 - When we're printing strings from the network, don't try to print
36800 non-printable characters. This protects us against shell escape
36801 sequence exploits, and also against attacks to fool humans into
36802 misreading their logs.
36803 - Fix a bug where Tor would fail to establish any connections if you
36804 left it off for 24 hours and then started it: we were happy with
36805 the obsolete network statuses, but they all referred to router
36806 descriptors that were too old to fetch, so we ended up with no
36807 valid router descriptors.
36808 - Fix a seg fault in the controller's "getinfo orconn-status"
36809 command while listing status on incoming handshaking connections.
36810 Introduce a status name "NEW" for these connections.
36811 - If we get a linelist or linelist_s config option from the torrc
36812 (e.g. ExitPolicy) and it has no value, warn and skip rather than
36813 silently resetting it to its default.
36814 - Don't abandon entry guards until they've been down or gone for
36816 - Cleaner and quieter log messages.
36819 - New controller signal NEWNYM that makes new application requests
36820 use clean circuits.
36821 - Add a new circuit purpose 'controller' to let the controller ask
36822 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
36823 controller command to let you specify the purpose if you're
36824 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
36825 command to let you change a circuit's purpose after it's been
36827 - Accept "private:*" in routerdesc exit policies; not generated yet
36828 because older Tors do not understand it.
36829 - Add BSD-style contributed startup script "rc.subr" from Peter
36833 Changes in version 0.1.1.14-alpha - 2006-02-20
36834 o Bugfixes on 0.1.1.x:
36835 - Don't die if we ask for a stdout or stderr log (even implicitly)
36836 and we're set to RunAsDaemon -- just warn.
36837 - We still had a few bugs in the OR connection rotation code that
36838 caused directory servers to slowly aggregate connections to other
36839 fast Tor servers. This time for sure!
36840 - Make log entries on Win32 include the name of the function again.
36841 - We were treating a pair of exit policies if they were equal even
36842 if one said accept and the other said reject -- causing us to
36843 not always publish a new descriptor since we thought nothing
36845 - Retry pending server downloads as well as pending networkstatus
36846 downloads when we unexpectedly get a socks request.
36847 - We were ignoring the IS_FAST flag in the directory status,
36848 meaning we were willing to pick trivial-bandwidth nodes for "fast"
36850 - If the controller's SAVECONF command fails (e.g. due to file
36851 permissions), let the controller know that it failed.
36854 - If we're trying to be a Tor server and running Windows 95/98/ME
36855 as a server, explain that we'll likely crash.
36856 - When we're a server, a client asks for an old-style directory,
36857 and our write bucket is empty, don't give it to him. This way
36858 small servers can continue to serve the directory *sometimes*,
36859 without getting overloaded.
36860 - Compress exit policies even more -- look for duplicate lines
36862 - Clients now honor the "guard" flag in the router status when
36863 picking entry guards, rather than looking at is_fast or is_stable.
36864 - Retain unrecognized lines in $DATADIR/state file, so that we can
36865 be forward-compatible.
36866 - Generate 18.0.0.0/8 address policy format in descs when we can;
36867 warn when the mask is not reducible to a bit-prefix.
36868 - Let the user set ControlListenAddress in the torrc. This can be
36869 dangerous, but there are some cases (like a secured LAN) where it
36871 - Split ReachableAddresses into ReachableDirAddresses and
36872 ReachableORAddresses, so we can restrict Dir conns to port 80
36873 and OR conns to port 443.
36874 - Now we can target arch and OS in rpm builds (contributed by
36875 Phobos). Also make the resulting dist-rpm filename match the
36877 - New config options to help controllers: FetchServerDescriptors
36878 and FetchHidServDescriptors for whether to fetch server
36879 info and hidserv info or let the controller do it, and
36880 PublishServerDescriptor and PublishHidServDescriptors.
36881 - Also let the controller set the __AllDirActionsPrivate config
36882 option if you want all directory fetches/publishes to happen via
36883 Tor (it assumes your controller bootstraps your circuits).
36886 Changes in version 0.1.0.17 - 2006-02-17
36887 o Crash bugfixes on 0.1.0.x:
36888 - When servers with a non-zero DirPort came out of hibernation,
36889 sometimes they would trigger an assert.
36891 o Other important bugfixes:
36892 - On platforms that don't have getrlimit (like Windows), we were
36893 artificially constraining ourselves to a max of 1024
36894 connections. Now just assume that we can handle as many as 15000
36895 connections. Hopefully this won't cause other problems.
36897 o Backported features:
36898 - When we're a server, a client asks for an old-style directory,
36899 and our write bucket is empty, don't give it to him. This way
36900 small servers can continue to serve the directory *sometimes*,
36901 without getting overloaded.
36902 - Whenever you get a 503 in response to a directory fetch, try
36903 once more. This will become important once servers start sending
36904 503's whenever they feel busy.
36905 - Fetch a new directory every 120 minutes, not every 40 minutes.
36906 Now that we have hundreds of thousands of users running the old
36907 directory algorithm, it's starting to hurt a lot.
36908 - Bump up the period for forcing a hidden service descriptor upload
36909 from 20 minutes to 1 hour.
36912 Changes in version 0.1.1.13-alpha - 2006-02-09
36913 o Crashes in 0.1.1.x:
36914 - When you tried to setconf ORPort via the controller, Tor would
36915 crash. So people using TorCP to become a server were sad.
36916 - Solve (I hope) the stack-smashing bug that we were seeing on fast
36917 servers. The problem appears to be something do with OpenSSL's
36918 random number generation, or how we call it, or something. Let me
36919 know if the crashes continue.
36920 - Turn crypto hardware acceleration off by default, until we find
36921 somebody smart who can test it for us. (It appears to produce
36922 seg faults in at least some cases.)
36923 - Fix a rare assert error when we've tried all intro points for
36924 a hidden service and we try fetching the service descriptor again:
36925 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
36928 - Fix a major load balance bug: we were round-robining in 16 KB
36929 chunks, and servers with bandwidthrate of 20 KB, while downloading
36930 a 600 KB directory, would starve their other connections. Now we
36931 try to be a bit more fair.
36932 - Dir authorities and mirrors were never expiring the newest
36933 descriptor for each server, causing memory and directory bloat.
36934 - Fix memory-bloating and connection-bloating bug on servers: We
36935 were never closing any connection that had ever had a circuit on
36936 it, because we were checking conn->n_circuits == 0, yet we had a
36937 bug that let it go negative.
36938 - Make Tor work using squid as your http proxy again -- squid
36939 returns an error if you ask for a URL that's too long, and it uses
36940 a really generic error message. Plus, many people are behind a
36941 transparent squid so they don't even realize it.
36942 - On platforms that don't have getrlimit (like Windows), we were
36943 artificially constraining ourselves to a max of 1024
36944 connections. Now just assume that we can handle as many as 15000
36945 connections. Hopefully this won't cause other problems.
36946 - Add a new config option ExitPolicyRejectPrivate which defaults to
36947 1. This means all exit policies will begin with rejecting private
36948 addresses, unless the server operator explicitly turns it off.
36951 - Clients no longer download descriptors for non-running
36953 - Before we add new directory authorities, we should make it
36954 clear that only v1 authorities should receive/publish hidden
36955 service descriptors.
36958 - As soon as we've fetched some more directory info, immediately
36959 try to download more server descriptors. This way we don't have
36960 a 10 second pause during initial bootstrapping.
36961 - Remove even more loud log messages that the server operator can't
36963 - When we're running an obsolete or un-recommended version, make
36964 the log message more clear about what the problem is and what
36965 versions *are* still recommended.
36966 - Provide a more useful warn message when our onion queue gets full:
36967 the CPU is too slow or the exit policy is too liberal.
36968 - Don't warn when we receive a 503 from a dirserver/cache -- this
36969 will pave the way for them being able to refuse if they're busy.
36970 - When we fail to bind a listener, try to provide a more useful
36971 log message: e.g., "Is Tor already running?"
36972 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
36973 Goldberg can prove things about our handshake protocol more
36975 - MaxConn has been obsolete for a while now. Document the ConnLimit
36976 config option, which is a *minimum* number of file descriptors
36977 that must be available else Tor refuses to start.
36978 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
36979 if you log to syslog and want something other than LOG_DAEMON.
36980 - Make dirservers generate a separate "guard" flag to mean,
36981 "would make a good entry guard". Make clients parse it and vote
36982 on it. Not used by clients yet.
36983 - Implement --with-libevent-dir option to ./configure. Also, improve
36984 search techniques to find libevent, and use those for openssl too.
36985 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
36986 - Only start testing reachability once we've established a
36987 circuit. This will make startup on dirservers less noisy.
36988 - Don't try to upload hidden service descriptors until we have
36989 established a circuit.
36990 - Fix the controller's "attachstream 0" command to treat conn like
36991 it just connected, doing address remapping, handling .exit and
36992 .onion idioms, and so on. Now we're more uniform in making sure
36993 that the controller hears about new and closing connections.
36996 Changes in version 0.1.1.12-alpha - 2006-01-11
36997 o Bugfixes on 0.1.1.x:
36998 - The fix to close duplicate server connections was closing all
36999 Tor client connections if they didn't establish a circuit
37000 quickly enough. Oops.
37001 - Fix minor memory issue (double-free) that happened on exit.
37003 o Bugfixes on 0.1.0.x:
37004 - Tor didn't warn when it failed to open a log file.
37007 Changes in version 0.1.1.11-alpha - 2006-01-10
37008 o Crashes in 0.1.1.x:
37009 - Include all the assert/crash fixes from 0.1.0.16.
37010 - If you start Tor and then quit very quickly, there were some
37011 races that tried to free things that weren't allocated yet.
37012 - Fix a rare memory stomp if you're running hidden services.
37013 - Fix segfault when specifying DirServer in config without nickname.
37014 - Fix a seg fault when you finish connecting to a server but at
37015 that moment you dump his server descriptor.
37016 - Extendcircuit and Attachstream controller commands would
37017 assert/crash if you don't give them enough arguments.
37018 - Fix an assert error when we're out of space in the connection_list
37019 and we try to post a hidden service descriptor (reported by weasel).
37020 - If you specify a relative torrc path and you set RunAsDaemon in
37021 your torrc, then it chdir()'s to the new directory. If you HUP,
37022 it tries to load the new torrc location, fails, and exits.
37023 The fix: no longer allow a relative path to torrc using -f.
37026 - Implement "entry guards": automatically choose a handful of entry
37027 nodes and stick with them for all circuits. Only pick new guards
37028 when the ones you have are unsuitable, and if the old guards
37029 become suitable again, switch back. This will increase security
37030 dramatically against certain end-point attacks. The EntryNodes
37031 config option now provides some hints about which entry guards you
37032 want to use most; and StrictEntryNodes means to only use those.
37033 - New directory logic: download by descriptor digest, not by
37034 fingerprint. Caches try to download all listed digests from
37035 authorities; clients try to download "best" digests from caches.
37036 This avoids partitioning and isolating attacks better.
37037 - Make the "stable" router flag in network-status be the median of
37038 the uptimes of running valid servers, and make clients pay
37039 attention to the network-status flags. Thus the cutoff adapts
37040 to the stability of the network as a whole, making IRC, IM, etc
37041 connections more reliable.
37044 - Tor servers with dynamic IP addresses were needing to wait 18
37045 hours before they could start doing reachability testing using
37046 the new IP address and ports. This is because they were using
37047 the internal descriptor to learn what to test, yet they were only
37048 rebuilding the descriptor once they decided they were reachable.
37049 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
37050 to download certain server descriptors, throw them away, and then
37051 fetch them again after 30 minutes. Now mirrors throw away these
37052 server descriptors so clients can't get them.
37053 - We were leaving duplicate connections to other ORs open for a week,
37054 rather than closing them once we detect a duplicate. This only
37055 really affected authdirservers, but it affected them a lot.
37056 - Spread the authdirservers' reachability testing over the entire
37057 testing interval, so we don't try to do 500 TLS's at once every
37061 - If the network is down, and we try to connect to a conn because
37062 we have a circuit in mind, and we timeout (30 seconds) because the
37063 network never answers, we were expiring the circuit, but we weren't
37064 obsoleting the connection or telling the entry_guards functions.
37065 - Some Tor servers process billions of cells per day. These statistics
37066 need to be uint64_t's.
37067 - Check for integer overflows in more places, when adding elements
37068 to smartlists. This could possibly prevent a buffer overflow
37069 on malicious huge inputs. I don't see any, but I haven't looked
37071 - ReachableAddresses kept growing new "reject *:*" lines on every
37073 - When you "setconf log" via the controller, it should remove all
37074 logs. We were automatically adding back in a "log notice stdout".
37075 - Newly bootstrapped Tor networks couldn't establish hidden service
37076 circuits until they had nodes with high uptime. Be more tolerant.
37077 - We were marking servers down when they could not answer every piece
37078 of the directory request we sent them. This was far too harsh.
37079 - Fix the torify (tsocks) config file to not use Tor for localhost
37081 - Directory authorities now go to the proper authority when asking for
37082 a networkstatus, even when they want a compressed one.
37083 - Fix a harmless bug that was causing Tor servers to log
37084 "Got an end because of misc error, but we're not an AP. Closing."
37085 - Authorities were treating their own descriptor changes as cosmetic,
37086 meaning the descriptor available in the network-status and the
37087 descriptor that clients downloaded were different.
37088 - The OS X installer was adding a symlink for tor_resolve but
37089 the binary was called tor-resolve (reported by Thomas Hardly).
37090 - Workaround a problem with some http proxies where they refuse GET
37091 requests that specify "Content-Length: 0" (reported by Adrian).
37092 - Fix wrong log message when you add a "HiddenServiceNodes" config
37093 line without any HiddenServiceDir line (reported by Chris Thomas).
37096 - Write the TorVersion into the state file so we have a prayer of
37097 keeping forward and backward compatibility.
37098 - Revive the FascistFirewall config option rather than eliminating it:
37099 now it's a synonym for ReachableAddresses *:80,*:443.
37100 - Clients choose directory servers from the network status lists,
37101 not from their internal list of router descriptors. Now they can
37102 go to caches directly rather than needing to go to authorities
37104 - Directory authorities ignore router descriptors that have only
37105 cosmetic differences: do this for 0.1.0.x servers now too.
37106 - Add a new flag to network-status indicating whether the server
37107 can answer v2 directory requests too.
37108 - Authdirs now stop whining so loudly about bad descriptors that
37109 they fetch from other dirservers. So when there's a log complaint,
37110 it's for sure from a freshly uploaded descriptor.
37111 - Reduce memory requirements in our structs by changing the order
37113 - There used to be two ways to specify your listening ports in a
37114 server descriptor: on the "router" line and with a separate "ports"
37115 line. Remove support for the "ports" line.
37116 - New config option "AuthDirRejectUnlisted" for auth dirservers as
37117 a panic button: if we get flooded with unusable servers we can
37118 revert to only listing servers in the approved-routers file.
37119 - Auth dir servers can now mark a fingerprint as "!reject" or
37120 "!invalid" in the approved-routers file (as its nickname), to
37121 refuse descriptors outright or include them but marked as invalid.
37122 - Servers store bandwidth history across restarts/crashes.
37123 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
37124 get a better idea of why their circuits failed. Not used yet.
37125 - Directory mirrors now cache up to 16 unrecognized network-status
37126 docs. Now we can add new authdirservers and they'll be cached too.
37127 - When picking a random directory, prefer non-authorities if any
37129 - New controller option "getinfo desc/all-recent" to fetch the
37130 latest server descriptor for every router that Tor knows about.
37133 Changes in version 0.1.0.16 - 2006-01-02
37134 o Crash bugfixes on 0.1.0.x:
37135 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
37136 corrupting the heap, losing FDs, or crashing when we need to resize
37137 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
37138 - It turns out sparc64 platforms crash on unaligned memory access
37139 too -- so detect and avoid this.
37140 - Handle truncated compressed data correctly (by detecting it and
37142 - Fix possible-but-unlikely free(NULL) in control.c.
37143 - When we were closing connections, there was a rare case that
37144 stomped on memory, triggering seg faults and asserts.
37145 - Avoid potential infinite recursion when building a descriptor. (We
37146 don't know that it ever happened, but better to fix it anyway.)
37147 - We were neglecting to unlink marked circuits from soon-to-close OR
37148 connections, which caused some rare scribbling on freed memory.
37149 - Fix a memory stomping race bug when closing the joining point of two
37150 rendezvous circuits.
37151 - Fix an assert in time parsing found by Steven Murdoch.
37153 o Other bugfixes on 0.1.0.x:
37154 - When we're doing reachability testing, provide more useful log
37155 messages so the operator knows what to expect.
37156 - Do not check whether DirPort is reachable when we are suppressing
37157 advertising it because of hibernation.
37158 - When building with -static or on Solaris, we sometimes needed -ldl.
37159 - When we're deciding whether a stream has enough circuits around
37160 that can handle it, count the freshly dirty ones and not the ones
37161 that are so dirty they won't be able to handle it.
37162 - When we're expiring old circuits, we had a logic error that caused
37163 us to close new rendezvous circuits rather than old ones.
37164 - Give a more helpful log message when you try to change ORPort via
37165 the controller: you should upgrade Tor if you want that to work.
37166 - We were failing to parse Tor versions that start with "Tor ".
37167 - Tolerate faulty streams better: when a stream fails for reason
37168 exitpolicy, stop assuming that the router is lying about his exit
37169 policy. When a stream fails for reason misc, allow it to retry just
37170 as if it was resolvefailed. When a stream has failed three times,
37171 reset its failure count so we can try again and get all three tries.
37174 Changes in version 0.1.1.10-alpha - 2005-12-11
37175 o Correctness bugfixes on 0.1.0.x:
37176 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
37177 corrupting the heap, losing FDs, or crashing when we need to resize
37178 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
37179 - Stop doing the complex voodoo overkill checking for insecure
37180 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
37181 - When we were closing connections, there was a rare case that
37182 stomped on memory, triggering seg faults and asserts.
37183 - We were neglecting to unlink marked circuits from soon-to-close OR
37184 connections, which caused some rare scribbling on freed memory.
37185 - When we're deciding whether a stream has enough circuits around
37186 that can handle it, count the freshly dirty ones and not the ones
37187 that are so dirty they won't be able to handle it.
37188 - Recover better from TCP connections to Tor servers that are
37189 broken but don't tell you (it happens!); and rotate TLS
37190 connections once a week.
37191 - When we're expiring old circuits, we had a logic error that caused
37192 us to close new rendezvous circuits rather than old ones.
37193 - Fix a scary-looking but apparently harmless bug where circuits
37194 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
37195 servers, and never switch to state CIRCUIT_STATE_OPEN.
37196 - When building with -static or on Solaris, we sometimes needed to
37198 - Give a useful message when people run Tor as the wrong user,
37199 rather than telling them to start chowning random directories.
37200 - We were failing to inform the controller about new .onion streams.
37202 o Security bugfixes on 0.1.0.x:
37203 - Refuse server descriptors if the fingerprint line doesn't match
37204 the included identity key. Tor doesn't care, but other apps (and
37205 humans) might actually be trusting the fingerprint line.
37206 - We used to kill the circuit when we receive a relay command we
37207 don't recognize. Now we just drop it.
37208 - Start obeying our firewall options more rigorously:
37209 . If we can't get to a dirserver directly, try going via Tor.
37210 . Don't ever try to connect (as a client) to a place our
37211 firewall options forbid.
37212 . If we specify a proxy and also firewall options, obey the
37213 firewall options even when we're using the proxy: some proxies
37214 can only proxy to certain destinations.
37215 - Fix a bug found by Lasse Overlier: when we were making internal
37216 circuits (intended to be cannibalized later for rendezvous and
37217 introduction circuits), we were picking them so that they had
37218 useful exit nodes. There was no need for this, and it actually
37219 aids some statistical attacks.
37220 - Start treating internal circuits and exit circuits separately.
37221 It's important to keep them separate because internal circuits
37222 have their last hops picked like middle hops, rather than like
37223 exit hops. So exiting on them will break the user's expectations.
37225 o Bugfixes on 0.1.1.x:
37226 - Take out the mis-feature where we tried to detect IP address
37227 flapping for people with DynDNS, and chose not to upload a new
37228 server descriptor sometimes.
37229 - Try to be compatible with OpenSSL 0.9.6 again.
37230 - Log fix: when the controller is logging about .onion addresses,
37231 sometimes it didn't include the ".onion" part of the address.
37232 - Don't try to modify options->DirServers internally -- if the
37233 user didn't specify any, just add the default ones directly to
37234 the trusted dirserver list. This fixes a bug where people running
37235 controllers would use SETCONF on some totally unrelated config
37236 option, and Tor would start yelling at them about changing their
37238 - Let the controller's redirectstream command specify a port, in
37239 case the controller wants to change that too.
37240 - When we requested a pile of server descriptors, we sometimes
37241 accidentally launched a duplicate request for the first one.
37242 - Bugfix for trackhostexits: write down the fingerprint of the
37243 chosen exit, not its nickname, because the chosen exit might not
37245 - When parsing foo.exit, if foo is unknown, and we are leaving
37246 circuits unattached, set the chosen_exit field and leave the
37247 address empty. This matters because controllers got confused
37249 - Directory authorities no longer try to download server
37250 descriptors that they know they will reject.
37252 o Features and updates:
37253 - Replace balanced trees with hash tables: this should make stuff
37254 significantly faster.
37255 - Resume using the AES counter-mode implementation that we ship,
37256 rather than OpenSSL's. Ours is significantly faster.
37257 - Many other CPU and memory improvements.
37258 - Add a new config option FastFirstHopPK (on by default) so clients
37259 do a trivial crypto handshake for their first hop, since TLS has
37260 already taken care of confidentiality and authentication.
37261 - Add a new config option TestSocks so people can see if their
37262 applications are using socks4, socks4a, socks5-with-ip, or
37263 socks5-with-hostname. This way they don't have to keep mucking
37264 with tcpdump and wondering if something got cached somewhere.
37265 - Warn when listening on a public address for socks. I suspect a
37266 lot of people are setting themselves up as open socks proxies,
37267 and they have no idea that jerks on the Internet are using them,
37268 since they simply proxy the traffic into the Tor network.
37269 - Add "private:*" as an alias in configuration for policies. Now
37270 you can simplify your exit policy rather than needing to list
37271 every single internal or nonroutable network space.
37272 - Add a new controller event type that allows controllers to get
37273 all server descriptors that were uploaded to a router in its role
37274 as authoritative dirserver.
37275 - Start shipping socks-extensions.txt, tor-doc-unix.html,
37276 tor-doc-server.html, and stylesheet.css in the tarball.
37277 - Stop shipping tor-doc.html in the tarball.
37280 Changes in version 0.1.1.9-alpha - 2005-11-15
37281 o Usability improvements:
37282 - Start calling it FooListenAddress rather than FooBindAddress,
37283 since few of our users know what it means to bind an address
37285 - Reduce clutter in server logs. We're going to try to make
37286 them actually usable now. New config option ProtocolWarnings that
37287 lets you hear about how _other Tors_ are breaking the protocol. Off
37289 - Divide log messages into logging domains. Once we put some sort
37290 of interface on this, it will let people looking at more verbose
37291 log levels specify the topics they want to hear more about.
37292 - Make directory servers return better http 404 error messages
37293 instead of a generic "Servers unavailable".
37294 - Check for even more Windows version flags when writing the platform
37295 string in server descriptors, and note any we don't recognize.
37296 - Clean up more of the OpenSSL memory when exiting, so we can detect
37297 memory leaks better.
37298 - Make directory authorities be non-versioning, non-naming by
37299 default. Now we can add new directory servers without requiring
37300 their operators to pay close attention.
37301 - When logging via syslog, include the pid whenever we provide
37302 a log entry. Suggested by Todd Fries.
37304 o Performance improvements:
37305 - Directory servers now silently throw away new descriptors that
37306 haven't changed much if the timestamps are similar. We do this to
37307 tolerate older Tor servers that upload a new descriptor every 15
37308 minutes. (It seemed like a good idea at the time.)
37309 - Inline bottleneck smartlist functions; use fast versions by default.
37310 - Add a "Map from digest to void*" abstraction digestmap_t so we
37311 can do less hex encoding/decoding. Use it in router_get_by_digest()
37312 to resolve a performance bottleneck.
37313 - Allow tor_gzip_uncompress to extract as much as possible from
37314 truncated compressed data. Try to extract as many
37315 descriptors as possible from truncated http responses (when
37316 DIR_PURPOSE_FETCH_ROUTERDESC).
37317 - Make circ->onionskin a pointer, not a static array. moria2 was using
37318 125000 circuit_t's after it had been up for a few weeks, which
37319 translates to 20+ megs of wasted space.
37320 - The private half of our EDH handshake keys are now chosen out
37321 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
37323 o Security improvements:
37324 - Start making directory caches retain old routerinfos, so soon
37325 clients can start asking by digest of descriptor rather than by
37326 fingerprint of server.
37327 - Add half our entropy from RAND_poll in OpenSSL. This knows how
37328 to use egd (if present), openbsd weirdness (if present), vms/os2
37329 weirdness (if we ever port there), and more in the future.
37331 o Bugfixes on 0.1.0.x:
37332 - Do round-robin writes of at most 16 kB per write. This might be
37333 more fair on loaded Tor servers, and it might resolve our Windows
37334 crash bug. It might also slow things down.
37335 - Our TLS handshakes were generating a single public/private
37336 keypair for the TLS context, rather than making a new one for
37337 each new connections. Oops. (But we were still rotating them
37338 periodically, so it's not so bad.)
37339 - When we were cannibalizing a circuit with a particular exit
37340 node in mind, we weren't checking to see if that exit node was
37341 already present earlier in the circuit. Oops.
37342 - When a Tor server's IP changes (e.g. from a dyndns address),
37343 upload a new descriptor so clients will learn too.
37344 - Really busy servers were keeping enough circuits open on stable
37345 connections that they were wrapping around the circuit_id
37346 space. (It's only two bytes.) This exposed a bug where we would
37347 feel free to reuse a circuit_id even if it still exists but has
37348 been marked for close. Try to fix this bug. Some bug remains.
37349 - If we would close a stream early (e.g. it asks for a .exit that
37350 we know would refuse it) but the LeaveStreamsUnattached config
37351 option is set by the controller, then don't close it.
37353 o Bugfixes on 0.1.1.8-alpha:
37354 - Fix a big pile of memory leaks, some of them serious.
37355 - Do not try to download a routerdesc if we would immediately reject
37357 - Resume inserting a newline between all router descriptors when
37358 generating (old style) signed directories, since our spec says
37360 - When providing content-type application/octet-stream for
37361 server descriptors using .z, we were leaving out the
37362 content-encoding header. Oops. (Everything tolerated this just
37363 fine, but that doesn't mean we need to be part of the problem.)
37364 - Fix a potential seg fault in getconf and getinfo using version 1
37365 of the controller protocol.
37366 - Avoid crash: do not check whether DirPort is reachable when we
37367 are suppressing it because of hibernation.
37368 - Make --hash-password not crash on exit.
37371 Changes in version 0.1.1.8-alpha - 2005-10-07
37372 o New features (major):
37373 - Clients don't download or use the directory anymore. Now they
37374 download and use network-statuses from the trusted dirservers,
37375 and fetch individual server descriptors as needed from mirrors.
37376 See dir-spec.txt for all the gory details.
37377 - Be more conservative about whether to advertise our DirPort.
37378 The main change is to not advertise if we're running at capacity
37379 and either a) we could hibernate or b) our capacity is low and
37380 we're using a default DirPort.
37381 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
37383 o New features (minor):
37384 - Try to be smart about when to retry network-status and
37385 server-descriptor fetches. Still needs some tuning.
37386 - Stop parsing, storing, or using running-routers output (but
37387 mirrors still cache and serve it).
37388 - Consider a threshold of versioning dirservers (dirservers who have
37389 an opinion about which Tor versions are still recommended) before
37390 deciding whether to warn the user that he's obsolete.
37391 - Dirservers can now reject/invalidate by key and IP, with the
37392 config options "AuthDirInvalid" and "AuthDirReject". This is
37393 useful since currently we automatically list servers as running
37394 and usable even if we know they're jerks.
37395 - Provide dire warnings to any users who set DirServer; move it out
37396 of torrc.sample and into torrc.complete.
37397 - Add MyFamily to torrc.sample in the server section.
37398 - Add nicknames to the DirServer line, so we can refer to them
37399 without requiring all our users to memorize their IP addresses.
37400 - When we get an EOF or a timeout on a directory connection, note
37401 how many bytes of serverdesc we are dropping. This will help
37402 us determine whether it is smart to parse incomplete serverdesc
37404 - Add a new function to "change pseudonyms" -- that is, to stop
37405 using any currently-dirty circuits for new streams, so we don't
37406 link new actions to old actions. Currently it's only called on
37407 HUP (or SIGNAL RELOAD).
37408 - On sighup, if UseHelperNodes changed to 1, use new circuits.
37409 - Start using RAND_bytes rather than RAND_pseudo_bytes from
37410 OpenSSL. Also, reseed our entropy every hour, not just at
37411 startup. And entropy in 512-bit chunks, not 160-bit chunks.
37413 o Fixes on 0.1.1.7-alpha:
37414 - Nobody ever implemented EVENT_ADDRMAP for control protocol
37415 version 0, so don't let version 0 controllers ask for it.
37416 - If you requested something with too many newlines via the
37417 v1 controller protocol, you could crash tor.
37418 - Fix a number of memory leaks, including some pretty serious ones.
37419 - Re-enable DirPort testing again, so Tor servers will be willing
37420 to advertise their DirPort if it's reachable.
37421 - On TLS handshake, only check the other router's nickname against
37422 its expected nickname if is_named is set.
37424 o Fixes forward-ported from 0.1.0.15:
37425 - Don't crash when we don't have any spare file descriptors and we
37426 try to spawn a dns or cpu worker.
37427 - Make the numbers in read-history and write-history into uint64s,
37428 so they don't overflow and publish negatives in the descriptor.
37430 o Fixes on 0.1.0.x:
37431 - For the OS X package's modified privoxy config file, comment
37432 out the "logfile" line so we don't log everything passed
37434 - We were whining about using socks4 or socks5-with-local-lookup
37435 even when it's an IP in the "virtual" range we designed exactly
37437 - We were leaking some memory every time the client changes IPs.
37438 - Never call free() on tor_malloc()d memory. This will help us
37439 use dmalloc to detect memory leaks.
37440 - Check for named servers when looking them up by nickname;
37441 warn when we'recalling a non-named server by its nickname;
37442 don't warn twice about the same name.
37443 - Try to list MyFamily elements by key, not by nickname, and warn
37444 if we've not heard of the server.
37445 - Make windows platform detection (uname equivalent) smarter.
37446 - It turns out sparc64 doesn't like unaligned access either.
37449 Changes in version 0.1.0.15 - 2005-09-23
37450 o Bugfixes on 0.1.0.x:
37451 - Reject ports 465 and 587 (spam targets) in default exit policy.
37452 - Don't crash when we don't have any spare file descriptors and we
37453 try to spawn a dns or cpu worker.
37454 - Get rid of IgnoreVersion undocumented config option, and make us
37455 only warn, never exit, when we're running an obsolete version.
37456 - Don't try to print a null string when your server finds itself to
37457 be unreachable and the Address config option is empty.
37458 - Make the numbers in read-history and write-history into uint64s,
37459 so they don't overflow and publish negatives in the descriptor.
37460 - Fix a minor memory leak in smartlist_string_remove().
37461 - We were only allowing ourselves to upload a server descriptor at
37462 most every 20 minutes, even if it changed earlier than that.
37463 - Clean up log entries that pointed to old URLs.
37466 Changes in version 0.1.1.7-alpha - 2005-09-14
37467 o Fixes on 0.1.1.6-alpha:
37468 - Exit servers were crashing when people asked them to make a
37469 connection to an address not in their exit policy.
37470 - Looking up a non-existent stream for a v1 control connection would
37472 - Fix a seg fault if we ask a dirserver for a descriptor by
37473 fingerprint but he doesn't know about him.
37474 - SETCONF was appending items to linelists, not clearing them.
37475 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
37476 out and refuse the setconf if it would fail.
37477 - Downgrade the dirserver log messages when whining about
37481 - Add Peter Palfrader's check-tor script to tor/contrib/
37482 It lets you easily check whether a given server (referenced by
37483 nickname) is reachable by you.
37484 - Numerous changes to move towards client-side v2 directories. Not
37487 o Fixes on 0.1.0.x:
37488 - If the user gave tor an odd number of command-line arguments,
37489 we were silently ignoring the last one. Now we complain and fail.
37490 [This wins the oldest-bug prize -- this bug has been present since
37491 November 2002, as released in Tor 0.0.0.]
37492 - Do not use unaligned memory access on alpha, mips, or mipsel.
37493 It *works*, but is very slow, so we treat them as if it doesn't.
37494 - Retry directory requests if we fail to get an answer we like
37495 from a given dirserver (we were retrying before, but only if
37496 we fail to connect).
37497 - When writing the RecommendedVersions line, sort them first.
37498 - When the client asked for a rendezvous port that the hidden
37499 service didn't want to provide, we were sending an IP address
37500 back along with the end cell. Fortunately, it was zero. But stop
37502 - Correct "your server is reachable" log entries to indicate that
37503 it was self-testing that told us so.
37506 Changes in version 0.1.1.6-alpha - 2005-09-09
37507 o Fixes on 0.1.1.5-alpha:
37508 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
37509 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
37510 - Fix bug with tor_memmem finding a match at the end of the string.
37511 - Make unit tests run without segfaulting.
37512 - Resolve some solaris x86 compile warnings.
37513 - Handle duplicate lines in approved-routers files without warning.
37514 - Fix bug where as soon as a server refused any requests due to his
37515 exit policy (e.g. when we ask for localhost and he tells us that's
37516 127.0.0.1 and he won't do it), we decided he wasn't obeying his
37517 exit policy using him for any exits.
37518 - Only do openssl hardware accelerator stuff if openssl version is
37521 o New controller features/fixes:
37522 - Add a "RESETCONF" command so you can set config options like
37523 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
37524 a config option in the torrc with no value, then it clears it
37525 entirely (rather than setting it to its default).
37526 - Add a "GETINFO config-file" to tell us where torrc is.
37527 - Avoid sending blank lines when GETINFO replies should be empty.
37528 - Add a QUIT command for the controller (for using it manually).
37529 - Fix a bug in SAVECONF that was adding default dirservers and
37530 other redundant entries to the torrc file.
37532 o Start on the new directory design:
37533 - Generate, publish, cache, serve new network-status format.
37534 - Publish individual descriptors (by fingerprint, by "all", and by
37536 - Publish client and server recommended versions separately.
37537 - Allow tor_gzip_uncompress() to handle multiple concatenated
37538 compressed strings. Serve compressed groups of router
37539 descriptors. The compression logic here could be more
37541 - Distinguish v1 authorities (all currently trusted directories)
37542 from v2 authorities (all trusted directories).
37543 - Change DirServers config line to note which dirs are v1 authorities.
37544 - Add configuration option "V1AuthoritativeDirectory 1" which
37545 moria1, moria2, and tor26 should set.
37546 - Remove option when getting directory cache to see whether they
37547 support running-routers; they all do now. Replace it with one
37548 to see whether caches support v2 stuff.
37551 - Dirservers now do their own external reachability testing of each
37552 Tor server, and only list them as running if they've been found to
37553 be reachable. We also send back warnings to the server's logs if
37554 it uploads a descriptor that we already believe is unreachable.
37555 - Implement exit enclaves: if we know an IP address for the
37556 destination, and there's a running Tor server at that address
37557 which allows exit to the destination, then extend the circuit to
37558 that exit first. This provides end-to-end encryption and end-to-end
37559 authentication. Also, if the user wants a .exit address or enclave,
37560 use 4 hops rather than 3, and cannibalize a general circ for it
37562 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
37563 controller. Also, rotate dns and cpu workers if the controller
37564 changes options that will affect them; and initialize the dns
37565 worker cache tree whether or not we start out as a server.
37566 - Only upload a new server descriptor when options change, 18
37567 hours have passed, uptime is reset, or bandwidth changes a lot.
37568 - Check [X-]Forwarded-For headers in HTTP requests when generating
37569 log messages. This lets people run dirservers (and caches) behind
37570 Apache but still know which IP addresses are causing warnings.
37572 o Config option changes:
37573 - Replace (Fascist)Firewall* config options with a new
37574 ReachableAddresses option that understands address policies.
37575 For example, "ReachableAddresses *:80,*:443"
37576 - Get rid of IgnoreVersion undocumented config option, and make us
37577 only warn, never exit, when we're running an obsolete version.
37578 - Make MonthlyAccountingStart config option truly obsolete now.
37580 o Fixes on 0.1.0.x:
37581 - Reject ports 465 and 587 in the default exit policy, since
37582 people have started using them for spam too.
37583 - It turns out we couldn't bootstrap a network since we added
37584 reachability detection in 0.1.0.1-rc. Good thing the Tor network
37585 has never gone down. Add an AssumeReachable config option to let
37586 servers and dirservers bootstrap. When we're trying to build a
37587 high-uptime or high-bandwidth circuit but there aren't enough
37588 suitable servers, try being less picky rather than simply failing.
37589 - Our logic to decide if the OR we connected to was the right guy
37590 was brittle and maybe open to a mitm for unverified routers.
37591 - We weren't cannibalizing circuits correctly for
37592 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
37593 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
37594 build those from scratch. This should make hidden services faster.
37595 - Predict required circuits better, with an eye toward making hidden
37596 services faster on the service end.
37597 - Retry streams if the exit node sends back a 'misc' failure. This
37598 should result in fewer random failures. Also, after failing
37599 from resolve failed or misc, reset the num failures, so we give
37600 it a fair shake next time we try.
37601 - Clean up the rendezvous warn log msgs, and downgrade some to info.
37602 - Reduce severity on logs about dns worker spawning and culling.
37603 - When we're shutting down and we do something like try to post a
37604 server descriptor or rendezvous descriptor, don't complain that
37605 we seem to be unreachable. Of course we are, we're shutting down.
37606 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
37607 We don't use them yet, but maybe one day our DNS resolver will be
37608 able to discover them.
37609 - Make ContactInfo mandatory for authoritative directory servers.
37610 - Require server descriptors to list IPv4 addresses -- hostnames
37611 are no longer allowed. This also fixes some potential security
37612 problems with people providing hostnames as their address and then
37613 preferentially resolving them to partition users.
37614 - Change log line for unreachability to explicitly suggest /etc/hosts
37615 as the culprit. Also make it clearer what IP address and ports we're
37616 testing for reachability.
37617 - Put quotes around user-supplied strings when logging so users are
37618 more likely to realize if they add bad characters (like quotes)
37620 - Let auth dir servers start without specifying an Address config
37622 - Make unit tests (and other invocations that aren't the real Tor)
37623 run without launching listeners, creating subdirectories, and so on.
37626 Changes in version 0.1.1.5-alpha - 2005-08-08
37627 o Bugfixes included in 0.1.0.14.
37629 o Bugfixes on 0.1.0.x:
37630 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
37631 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
37632 it would silently using ignore the 6668.
37635 Changes in version 0.1.0.14 - 2005-08-08
37636 o Bugfixes on 0.1.0.x:
37637 - Fix the other half of the bug with crypto handshakes
37639 - Fix an assert trigger if you send a 'signal term' via the
37640 controller when it's listening for 'event info' messages.
37643 Changes in version 0.1.1.4-alpha - 2005-08-04
37644 o Bugfixes included in 0.1.0.13.
37647 - Improve tor_gettimeofday() granularity on windows.
37648 - Make clients regenerate their keys when their IP address changes.
37649 - Implement some more GETINFO goodness: expose helper nodes, config
37650 options, getinfo keys.
37653 Changes in version 0.1.0.13 - 2005-08-04
37654 o Bugfixes on 0.1.0.x:
37655 - Fix a critical bug in the security of our crypto handshakes.
37656 - Fix a size_t underflow in smartlist_join_strings2() that made
37657 it do bad things when you hand it an empty smartlist.
37658 - Fix Windows installer to ship Tor license (thanks to Aphex for
37659 pointing out this oversight) and put a link to the doc directory
37661 - Explicitly set no-unaligned-access for sparc: it turns out the
37662 new gcc's let you compile broken code, but that doesn't make it
37666 Changes in version 0.1.1.3-alpha - 2005-07-23
37667 o Bugfixes on 0.1.1.2-alpha:
37668 - Fix a bug in handling the controller's "post descriptor"
37670 - Fix several bugs in handling the controller's "extend circuit"
37672 - Fix a bug in handling the controller's "stream status" event.
37673 - Fix an assert failure if we have a controller listening for
37674 circuit events and we go offline.
37675 - Re-allow hidden service descriptors to publish 0 intro points.
37676 - Fix a crash when generating your hidden service descriptor if
37677 you don't have enough intro points already.
37679 o New features on 0.1.1.2-alpha:
37680 - New controller function "getinfo accounting", to ask how
37681 many bytes we've used in this time period.
37682 - Experimental support for helper nodes: a lot of the risk from
37683 a small static adversary comes because users pick new random
37684 nodes every time they rebuild a circuit. Now users will try to
37685 stick to the same small set of entry nodes if they can. Not
37686 enabled by default yet.
37688 o Bugfixes on 0.1.0.12:
37689 - If you're an auth dir server, always publish your dirport,
37690 even if you haven't yet found yourself to be reachable.
37691 - Fix a size_t underflow in smartlist_join_strings2() that made
37692 it do bad things when you hand it an empty smartlist.
37695 Changes in version 0.1.0.12 - 2005-07-18
37696 o New directory servers:
37697 - tor26 has changed IP address.
37699 o Bugfixes on 0.1.0.x:
37700 - Fix a possible double-free in tor_gzip_uncompress().
37701 - When --disable-threads is set, do not search for or link against
37702 pthreads libraries.
37703 - Don't trigger an assert if an authoritative directory server
37704 claims its dirport is 0.
37705 - Fix bug with removing Tor as an NT service: some people were
37706 getting "The service did not return an error." Thanks to Matt
37710 Changes in version 0.1.1.2-alpha - 2005-07-15
37711 o New directory servers:
37712 - tor26 has changed IP address.
37714 o Bugfixes on 0.1.0.x, crashes/leaks:
37715 - Port the servers-not-obeying-their-exit-policies fix from
37717 - Fix an fd leak in start_daemon().
37718 - On Windows, you can't always reopen a port right after you've
37719 closed it. So change retry_listeners() to only close and re-open
37720 ports that have changed.
37721 - Fix a possible double-free in tor_gzip_uncompress().
37723 o Bugfixes on 0.1.0.x, usability:
37724 - When tor_socketpair() fails in Windows, give a reasonable
37725 Windows-style errno back.
37726 - Let people type "tor --install" as well as "tor -install" when
37728 want to make it an NT service.
37729 - NT service patch from Matt Edman to improve error messages.
37730 - When the controller asks for a config option with an abbreviated
37731 name, give the full name in our response.
37732 - Correct the man page entry on TrackHostExitsExpire.
37733 - Looks like we were never delivering deflated (i.e. compressed)
37734 running-routers lists, even when asked. Oops.
37735 - When --disable-threads is set, do not search for or link against
37736 pthreads libraries.
37738 o Bugfixes on 0.1.1.x:
37739 - Fix a seg fault with autodetecting which controller version is
37743 - New hidden service descriptor format: put a version in it, and
37744 let people specify introduction/rendezvous points that aren't
37745 in "the directory" (which is subjective anyway).
37746 - Allow the DEBUG controller event to work again. Mark certain log
37747 entries as "don't tell this to controllers", so we avoid cycles.
37750 Changes in version 0.1.0.11 - 2005-06-30
37751 o Bugfixes on 0.1.0.x:
37752 - Fix major security bug: servers were disregarding their
37753 exit policies if clients behaved unexpectedly.
37754 - Make OS X init script check for missing argument, so we don't
37755 confuse users who invoke it incorrectly.
37756 - Fix a seg fault in "tor --hash-password foo".
37757 - The MAPADDRESS control command was broken.
37760 Changes in version 0.1.1.1-alpha - 2005-06-29
37762 - Make OS X init script check for missing argument, so we don't
37763 confuse users who invoke it incorrectly.
37764 - Fix a seg fault in "tor --hash-password foo".
37765 - Fix a possible way to DoS dirservers.
37766 - When we complain that your exit policy implicitly allows local or
37767 private address spaces, name them explicitly so operators can
37769 - Make the log message less scary when all the dirservers are
37770 temporarily unreachable.
37771 - We were printing the number of idle dns workers incorrectly when
37775 - Revised controller protocol (version 1) that uses ascii rather
37776 than binary. Add supporting libraries in python and java so you
37777 can use the controller from your applications without caring how
37778 our protocol works.
37779 - Spiffy new support for crypto hardware accelerators. Can somebody
37783 Changes in version 0.0.9.10 - 2005-06-16
37784 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
37785 - Refuse relay cells that claim to have a length larger than the
37786 maximum allowed. This prevents a potential attack that could read
37787 arbitrary memory (e.g. keys) from an exit server's process
37791 Changes in version 0.1.0.10 - 2005-06-14
37792 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
37793 libevent before 1.1a.
37796 Changes in version 0.1.0.9-rc - 2005-06-09
37798 - Reset buf->highwater every time buf_shrink() is called, not just on
37799 a successful shrink. This was causing significant memory bloat.
37800 - Fix buffer overflow when checking hashed passwords.
37801 - Security fix: if seeding the RNG on Win32 fails, quit.
37802 - Allow seeding the RNG on Win32 even when you're not running as
37804 - Disable threading on Solaris too. Something is wonky with it,
37805 cpuworkers, and reentrant libs.
37806 - Reenable the part of the code that tries to flush as soon as an
37807 OR outbuf has a full TLS record available. Perhaps this will make
37808 OR outbufs not grow as huge except in rare cases, thus saving lots
37809 of CPU time plus memory.
37810 - Reject malformed .onion addresses rather then passing them on as
37811 normal web requests.
37812 - Adapt patch from Adam Langley: fix possible memory leak in
37813 tor_lookup_hostname().
37814 - Initialize libevent later in the startup process, so the logs are
37815 already established by the time we start logging libevent warns.
37816 - Use correct errno on win32 if libevent fails.
37817 - Check and warn about known-bad/slow libevent versions.
37818 - Pay more attention to the ClientOnly config option.
37819 - Have torctl.in/tor.sh.in check for location of su binary (needed
37821 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
37822 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
37823 HttpProxyAuthenticator
37824 - Stop warning about sigpipes in the logs. We're going to
37825 pretend that getting these occasionally is normal and fine.
37826 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
37828 installer screens; and don't put stuff into StartupItems unless
37829 the user asks you to.
37830 - Require servers that use the default dirservers to have public IP
37831 addresses. We have too many servers that are configured with private
37832 IPs and their admins never notice the log entries complaining that
37833 their descriptors are being rejected.
37834 - Add OSX uninstall instructions. An actual uninstall script will
37838 Changes in version 0.1.0.8-rc - 2005-05-23
37840 - It turns out that kqueue on OS X 10.3.9 was causing kernel
37841 panics. Disable kqueue on all OS X Tors.
37842 - Fix RPM: remove duplicate line accidentally added to the rpm
37844 - Disable threads on openbsd too, since its gethostaddr is not
37846 - Tolerate libevent 0.8 since it still works, even though it's
37848 - Enable building on Red Hat 9.0 again.
37849 - Allow the middle hop of the testing circuit to be running any
37850 version, now that most of them have the bugfix to let them connect
37851 to unknown servers. This will allow reachability testing to work
37852 even when 0.0.9.7-0.0.9.9 become obsolete.
37853 - Handle relay cells with rh.length too large. This prevents
37854 a potential attack that could read arbitrary memory (maybe even
37855 keys) from the exit server's process.
37856 - We screwed up the dirport reachability testing when we don't yet
37857 have a cached version of the directory. Hopefully now fixed.
37858 - Clean up router_load_single_router() (used by the controller),
37859 so it doesn't seg fault on error.
37860 - Fix a minor memory leak when somebody establishes an introduction
37861 point at your Tor server.
37862 - If a socks connection ends because read fails, don't warn that
37863 you're not sending a socks reply back.
37866 - Add HttpProxyAuthenticator config option too, that works like
37867 the HttpsProxyAuthenticator config option.
37868 - Encode hashed controller passwords in hex instead of base64,
37869 to make it easier to write controllers.
37872 Changes in version 0.1.0.7-rc - 2005-05-17
37874 - Fix a bug in the OS X package installer that prevented it from
37875 installing on Tiger.
37876 - Fix a script bug in the OS X package installer that made it
37877 complain during installation.
37878 - Find libevent even if it's hiding in /usr/local/ and your
37879 CFLAGS and LDFLAGS don't tell you to look there.
37880 - Be able to link with libevent as a shared library (the default
37881 after 1.0d), even if it's hiding in /usr/local/lib and even
37882 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
37883 assuming you're running gcc. Otherwise fail and give a useful
37885 - Fix a bug in the RPM packager: set home directory for _tor to
37886 something more reasonable when first installing.
37887 - Free a minor amount of memory that is still reachable on exit.
37890 Changes in version 0.1.0.6-rc - 2005-05-14
37892 - Implement --disable-threads configure option. Disable threads on
37893 netbsd by default, because it appears to have no reentrant resolver
37895 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
37896 release (1.1) detects and disables kqueue if it's broken.
37897 - Append default exit policy before checking for implicit internal
37898 addresses. Now we don't log a bunch of complaints on startup
37899 when using the default exit policy.
37900 - Some people were putting "Address " in their torrc, and they had
37901 a buggy resolver that resolved " " to 0.0.0.0. Oops.
37902 - If DataDir is ~/.tor, and that expands to /.tor, then default to
37903 LOCALSTATEDIR/tor instead.
37904 - Fix fragmented-message bug in TorControl.py.
37905 - Resolve a minor bug which would prevent unreachable dirports
37906 from getting suppressed in the published descriptor.
37907 - When the controller gave us a new descriptor, we weren't resolving
37908 it immediately, so Tor would think its address was 0.0.0.0 until
37909 we fetched a new directory.
37910 - Fix an uppercase/lowercase case error in suppressing a bogus
37911 libevent warning on some Linuxes.
37914 - Begin scrubbing sensitive strings from logs by default. Turn off
37915 the config option SafeLogging if you need to do debugging.
37916 - Switch to a new buffer management algorithm, which tries to avoid
37917 reallocing and copying quite as much. In first tests it looks like
37918 it uses *more* memory on average, but less cpu.
37919 - First cut at support for "create-fast" cells. Clients can use
37920 these when extending to their first hop, since the TLS already
37921 provides forward secrecy and authentication. Not enabled on
37923 - When dirservers refuse a router descriptor, we now log its
37924 contactinfo, platform, and the poster's IP address.
37925 - Call tor_free_all instead of connections_free_all after forking, to
37926 save memory on systems that need to fork.
37927 - Whine at you if you're a server and you don't set your contactinfo.
37928 - Implement --verify-config command-line option to check if your torrc
37929 is valid without actually launching Tor.
37930 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
37931 rather than just rejecting it.
37934 Changes in version 0.1.0.5-rc - 2005-04-27
37936 - Stop trying to print a null pointer if an OR conn fails because
37937 we didn't like its cert.
37939 - Switch our internal buffers implementation to use a ring buffer,
37940 to hopefully improve performance for fast servers a lot.
37941 - Add HttpsProxyAuthenticator support (basic auth only), based
37942 on patch from Adam Langley.
37943 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
37944 the fast servers that have been joining lately.
37945 - Give hidden service accesses extra time on the first attempt,
37946 since 60 seconds is often only barely enough. This might improve
37948 - Improve performance for dirservers: stop re-parsing the whole
37949 directory every time you regenerate it.
37950 - Add more debugging info to help us find the weird dns freebsd
37951 pthreads bug; cleaner debug messages to help track future issues.
37954 Changes in version 0.0.9.9 - 2005-04-23
37955 o Bugfixes on 0.0.9.x:
37956 - If unofficial Tor clients connect and send weird TLS certs, our
37957 Tor server triggers an assert. This release contains a minimal
37958 backport from the broader fix that we put into 0.1.0.4-rc.
37961 Changes in version 0.1.0.4-rc - 2005-04-23
37963 - If unofficial Tor clients connect and send weird TLS certs, our
37964 Tor server triggers an assert. Stop asserting, and start handling
37965 TLS errors better in other situations too.
37966 - When the controller asks us to tell it about all the debug-level
37967 logs, it turns out we were generating debug-level logs while
37968 telling it about them, which turns into a bad loop. Now keep
37969 track of whether you're sending a debug log to the controller,
37970 and don't log when you are.
37971 - Fix the "postdescriptor" feature of the controller interface: on
37972 non-complete success, only say "done" once.
37974 - Clients are now willing to load balance over up to 2mB, not 1mB,
37975 of advertised bandwidth capacity.
37976 - Add a NoPublish config option, so you can be a server (e.g. for
37977 testing running Tor servers in other Tor networks) without
37978 publishing your descriptor to the primary dirservers.
37981 Changes in version 0.1.0.3-rc - 2005-04-08
37982 o Improvements on 0.1.0.2-rc:
37983 - Client now retries when streams end early for 'hibernating' or
37984 'resource limit' reasons, rather than failing them.
37985 - More automated handling for dirserver operators:
37986 - Automatically approve nodes running 0.1.0.2-rc or later,
37987 now that the the reachability detection stuff is working.
37988 - Now we allow two unverified servers with the same nickname
37989 but different keys. But if a nickname is verified, only that
37990 nickname+key are allowed.
37991 - If you're an authdirserver connecting to an address:port,
37992 and it's not the OR you were expecting, forget about that
37993 descriptor. If he *was* the one you were expecting, then forget
37994 about all other descriptors for that address:port.
37995 - Allow servers to publish descriptors from 12 hours in the future.
37996 Corollary: only whine about clock skew from the dirserver if
37997 he's a trusted dirserver (since now even verified servers could
37998 have quite wrong clocks).
37999 - Adjust maximum skew and age for rendezvous descriptors: let skew
38000 be 48 hours rather than 90 minutes.
38001 - Efficiency improvements:
38002 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
38003 it much faster to look up a circuit for each relay cell.
38004 - Remove most calls to assert_all_pending_dns_resolves_ok(),
38005 since they're eating our cpu on exit nodes.
38006 - Stop wasting time doing a case insensitive comparison for every
38007 dns name every time we do any lookup. Canonicalize the names to
38008 lowercase and be done with it.
38009 - Start sending 'truncated' cells back rather than destroy cells,
38010 if the circuit closes in front of you. This means we won't have
38011 to abandon partially built circuits.
38012 - Only warn once per nickname from add_nickname_list_to_smartlist
38013 per failure, so an entrynode or exitnode choice that's down won't
38015 - Put a note in the torrc about abuse potential with the default
38017 - Revise control spec and implementation to allow all log messages to
38018 be sent to controller with their severities intact (suggested by
38019 Matt Edman). Update TorControl to handle new log event types.
38020 - Provide better explanation messages when controller's POSTDESCRIPTOR
38022 - Stop putting nodename in the Platform string in server descriptors.
38023 It doesn't actually help, and it is confusing/upsetting some people.
38025 o Bugfixes on 0.1.0.2-rc:
38026 - We were printing the host mask wrong in exit policies in server
38027 descriptors. This isn't a critical bug though, since we were still
38028 obeying the exit policy internally.
38029 - Fix Tor when compiled with libevent but without pthreads: move
38030 connection_unregister() from _connection_free() to
38032 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
38033 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
38034 when we look through the connection array, we'll find any of the
38035 cpu/dnsworkers. This is no good.
38037 o Bugfixes on 0.0.9.8:
38038 - Fix possible bug on threading platforms (e.g. win32) which was
38039 leaking a file descriptor whenever a cpuworker or dnsworker died.
38040 - When using preferred entry or exit nodes, ignore whether the
38041 circuit wants uptime or capacity. They asked for the nodes, they
38043 - chdir() to your datadirectory at the *end* of the daemonize process,
38044 not the beginning. This was a problem because the first time you
38045 run tor, if your datadir isn't there, and you have runasdaemon set
38046 to 1, it will try to chdir to it before it tries to create it. Oops.
38047 - Handle changed router status correctly when dirserver reloads
38048 fingerprint file. We used to be dropping all unverified descriptors
38049 right then. The bug was hidden because we would immediately
38050 fetch a directory from another dirserver, which would include the
38051 descriptors we just dropped.
38052 - When we're connecting to an OR and he's got a different nickname/key
38053 than we were expecting, only complain loudly if we're an OP or a
38054 dirserver. Complaining loudly to the OR admins just confuses them.
38055 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
38056 artificially capped at 500kB.
38059 Changes in version 0.0.9.8 - 2005-04-07
38060 o Bugfixes on 0.0.9.x:
38061 - We have a bug that I haven't found yet. Sometimes, very rarely,
38062 cpuworkers get stuck in the 'busy' state, even though the cpuworker
38063 thinks of itself as idle. This meant that no new circuits ever got
38064 established. Here's a workaround to kill any cpuworker that's been
38065 busy for more than 100 seconds.
38068 Changes in version 0.1.0.2-rc - 2005-04-01
38069 o Bugfixes on 0.1.0.1-rc:
38070 - Fixes on reachability detection:
38071 - Don't check for reachability while hibernating.
38072 - If ORPort is reachable but DirPort isn't, still publish the
38073 descriptor, but zero out DirPort until it's found reachable.
38074 - When building testing circs for ORPort testing, use only
38075 high-bandwidth nodes, so fewer circuits fail.
38076 - Complain about unreachable ORPort separately from unreachable
38077 DirPort, so the user knows what's going on.
38078 - Make sure we only conclude ORPort reachability if we didn't
38079 initiate the conn. Otherwise we could falsely conclude that
38080 we're reachable just because we connected to the guy earlier
38081 and he used that same pipe to extend to us.
38082 - Authdirservers shouldn't do ORPort reachability detection,
38083 since they're in clique mode, so it will be rare to find a
38084 server not already connected to them.
38085 - When building testing circuits, always pick middle hops running
38086 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
38087 bug. (This is a kludge; it will go away when 0.0.9.x becomes
38089 - When we decide we're reachable, actually publish our descriptor
38091 - Fix bug in redirectstream in the controller.
38092 - Fix the state descriptor strings so logs don't claim edge streams
38093 are in a different state than they actually are.
38094 - Use recent libevent features when possible (this only really affects
38095 win32 and osx right now, because the new libevent with these
38096 features hasn't been released yet). Add code to suppress spurious
38098 - Prevent possible segfault in connection_close_unattached_ap().
38099 - Fix newlines on torrc in win32.
38100 - Improve error msgs when tor-resolve fails.
38102 o Improvements on 0.0.9.x:
38103 - New experimental script tor/contrib/ExerciseServer.py (needs more
38104 work) that uses the controller interface to build circuits and
38105 fetch pages over them. This will help us bootstrap servers that
38106 have lots of capacity but haven't noticed it yet.
38107 - New experimental script tor/contrib/PathDemo.py (needs more work)
38108 that uses the controller interface to let you choose whole paths
38110 "<hostname>.<path,separated by dots>.<length of path>.path"
38111 - When we've connected to an OR and handshaked but didn't like
38112 the result, we were closing the conn without sending destroy
38113 cells back for pending circuits. Now send those destroys.
38116 Changes in version 0.0.9.7 - 2005-04-01
38117 o Bugfixes on 0.0.9.x:
38118 - Fix another race crash bug (thanks to Glenn Fink for reporting).
38119 - Compare identity to identity, not to nickname, when extending to
38120 a router not already in the directory. This was preventing us from
38121 extending to unknown routers. Oops.
38122 - Make sure to create OS X Tor user in <500 range, so we aren't
38123 creating actual system users.
38124 - Note where connection-that-hasn't-sent-end was marked, and fix
38125 a few really loud instances of this harmless bug (it's fixed more
38129 Changes in version 0.1.0.1-rc - 2005-03-28
38131 - Add reachability testing. Your Tor server will automatically try
38132 to see if its ORPort and DirPort are reachable from the outside,
38133 and it won't upload its descriptor until it decides they are.
38134 - Handle unavailable hidden services better. Handle slow or busy
38135 hidden services better.
38136 - Add support for CONNECTing through https proxies, with "HttpsProxy"
38138 - New exit policy: accept most low-numbered ports, rather than
38139 rejecting most low-numbered ports.
38140 - More Tor controller support (still experimental). See
38141 http://tor.eff.org/doc/control-spec.txt for all the new features,
38142 including signals to emulate unix signals from any platform;
38143 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
38144 closestream; closecircuit; etc.
38145 - Make nt services work and start on startup on win32 (based on
38146 patch by Matt Edman).
38147 - Add a new AddressMap config directive to rewrite incoming socks
38148 addresses. This lets you, for example, declare an implicit
38149 required exit node for certain sites.
38150 - Add a new TrackHostExits config directive to trigger addressmaps
38151 for certain incoming socks addresses -- for sites that break when
38152 your exit keeps changing (based on patch by Mike Perry).
38153 - Redo the client-side dns cache so it's just an addressmap too.
38154 - Notice when our IP changes, and reset stats/uptime/reachability.
38155 - When an application is using socks5, give him the whole variety of
38156 potential socks5 responses (connect refused, host unreachable, etc),
38157 rather than just "success" or "failure".
38158 - A more sane version numbering system. See
38159 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
38160 - New contributed script "exitlist": a simple python script to
38161 parse directories and find Tor nodes that exit to listed
38163 - New contributed script "privoxy-tor-toggle" to toggle whether
38164 Privoxy uses Tor. Seems to be configured for Debian by default.
38165 - Report HTTP reasons to client when getting a response from directory
38166 servers -- so you can actually know what went wrong.
38167 - New config option MaxAdvertisedBandwidth which lets you advertise
38168 a low bandwidthrate (to not attract as many circuits) while still
38169 allowing a higher bandwidthrate in reality.
38171 o Robustness/stability fixes:
38172 - Make Tor use Niels Provos's libevent instead of its current
38173 poll-but-sometimes-select mess. This will let us use faster async
38174 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
38176 - pthread support now too. This was forced because when we forked,
38177 we ended up wasting a lot of duplicate ram over time. Also switch
38178 to foo_r versions of some library calls to allow reentry and
38180 - Better handling for heterogeneous / unreliable nodes:
38181 - Annotate circuits w/ whether they aim to contain high uptime nodes
38182 and/or high capacity nodes. When building circuits, choose
38184 - This means that every single node in an intro rend circuit,
38185 not just the last one, will have a minimum uptime.
38186 - New config option LongLivedPorts to indicate application streams
38187 that will want high uptime circuits.
38188 - Servers reset uptime when a dir fetch entirely fails. This
38189 hopefully reflects stability of the server's network connectivity.
38190 - If somebody starts his tor server in Jan 2004 and then fixes his
38191 clock, don't make his published uptime be a year.
38192 - Reset published uptime when you wake up from hibernation.
38193 - Introduce a notion of 'internal' circs, which are chosen without
38194 regard to the exit policy of the last hop. Intro and rendezvous
38195 circs must be internal circs, to avoid leaking information. Resolve
38196 and connect streams can use internal circs if they want.
38197 - New circuit pooling algorithm: make sure to have enough circs around
38198 to satisfy any predicted ports, and also make sure to have 2 internal
38199 circs around if we've required internal circs lately (and with high
38200 uptime if we've seen that lately too).
38201 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
38202 which describes how often we retry making new circuits if current
38203 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
38204 how long we're willing to make use of an already-dirty circuit.
38205 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
38206 circ as necessary, if there are any completed ones lying around
38207 when we try to launch one.
38208 - Make hidden services try to establish a rendezvous for 30 seconds,
38209 rather than for n (where n=3) attempts to build a circuit.
38210 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
38211 "ShutdownWaitLength".
38212 - Try to be more zealous about calling connection_edge_end when
38213 things go bad with edge conns in connection.c.
38214 - Revise tor-spec to add more/better stream end reasons.
38215 - Revise all calls to connection_edge_end to avoid sending "misc",
38216 and to take errno into account where possible.
38219 - Fix a race condition that can trigger an assert, when we have a
38220 pending create cell and an OR connection fails right then.
38221 - Fix several double-mark-for-close bugs, e.g. where we were finding
38222 a conn for a cell even if that conn is already marked for close.
38223 - Make sequence of log messages when starting on win32 with no config
38224 file more reasonable.
38225 - When choosing an exit node for a new non-internal circ, don't take
38226 into account whether it'll be useful for any pending x.onion
38227 addresses -- it won't.
38228 - Turn addr_policy_compare from a tristate to a quadstate; this should
38229 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
38230 for google.com" problem.
38231 - Make "platform" string in descriptor more accurate for Win32 servers,
38232 so it's not just "unknown platform".
38233 - Fix an edge case in parsing config options (thanks weasel).
38234 If they say "--" on the commandline, it's not an option.
38235 - Reject odd-looking addresses at the client (e.g. addresses that
38236 contain a colon), rather than having the server drop them because
38238 - tor-resolve requests were ignoring .exit if there was a working circuit
38239 they could use instead.
38240 - REUSEADDR on normal platforms means you can rebind to the port
38241 right after somebody else has let it go. But REUSEADDR on win32
38242 means to let you bind to the port _even when somebody else
38243 already has it bound_! So, don't do that on Win32.
38244 - Change version parsing logic: a version is "obsolete" if it is not
38245 recommended and (1) there is a newer recommended version in the
38246 same series, or (2) there are no recommended versions in the same
38247 series, but there are some recommended versions in a newer series.
38248 A version is "new" if it is newer than any recommended version in
38250 - Stop most cases of hanging up on a socks connection without sending
38254 - Require BandwidthRate to be at least 20kB/s for servers.
38255 - When a dirserver causes you to give a warn, mention which dirserver
38257 - New config option DirAllowPrivateAddresses for authdirservers.
38258 Now by default they refuse router descriptors that have non-IP or
38259 private-IP addresses.
38260 - Stop publishing socksport in the directory, since it's not
38261 actually meant to be public. For compatibility, publish a 0 there
38263 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
38264 smart" value, that is low for servers and high for clients.
38265 - If our clock jumps forward by 100 seconds or more, assume something
38266 has gone wrong with our network and abandon all not-yet-used circs.
38267 - Warn when exit policy implicitly allows local addresses.
38268 - If we get an incredibly skewed timestamp from a dirserver mirror
38269 that isn't a verified OR, don't warn -- it's probably him that's
38271 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
38272 cookies to disk and doesn't log each web request to disk. (Thanks
38273 to Brett Carrington for pointing this out.)
38274 - When a client asks us for a dir mirror and we don't have one,
38275 launch an attempt to get a fresh one.
38276 - If we're hibernating and we get a SIGINT, exit immediately.
38277 - Add --with-dmalloc ./configure option, to track memory leaks.
38278 - And try to free all memory on closing, so we can detect what
38280 - Cache local dns resolves correctly even when they're .exit
38282 - Give a better warning when some other server advertises an
38283 ORPort that is actually an apache running ssl.
38284 - Add "opt hibernating 1" to server descriptor to make it clearer
38285 whether the server is hibernating.
38288 Changes in version 0.0.9.6 - 2005-03-24
38289 o Bugfixes on 0.0.9.x (crashes and asserts):
38290 - Add new end stream reasons to maintenance branch. Fix bug where
38291 reason (8) could trigger an assert. Prevent bug from recurring.
38292 - Apparently win32 stat wants paths to not end with a slash.
38293 - Fix assert triggers in assert_cpath_layer_ok(), where we were
38294 blowing away the circuit that conn->cpath_layer points to, then
38295 checking to see if the circ is well-formed. Backport check to make
38296 sure we dont use the cpath on a closed connection.
38297 - Prevent circuit_resume_edge_reading_helper() from trying to package
38298 inbufs for marked-for-close streams.
38299 - Don't crash on hup if your options->address has become unresolvable.
38300 - Some systems (like OS X) sometimes accept() a connection and tell
38301 you the remote host is 0.0.0.0:0. If this happens, due to some
38302 other mis-features, we get confused; so refuse the conn for now.
38304 o Bugfixes on 0.0.9.x (other):
38305 - Fix harmless but scary "Unrecognized content encoding" warn message.
38306 - Add new stream error reason: TORPROTOCOL reason means "you are not
38307 speaking a version of Tor I understand; say bye-bye to your stream."
38308 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
38309 into the future, now that we are more tolerant of skew. This
38310 resolves a bug where a Tor server would refuse to cache a directory
38311 because all the directories it gets are too far in the future;
38312 yet the Tor server never logs any complaints about clock skew.
38313 - Mac packaging magic: make man pages useable, and do not overwrite
38314 existing torrc files.
38315 - Make OS X log happily to /var/log/tor/tor.log
38318 Changes in version 0.0.9.5 - 2005-02-22
38319 o Bugfixes on 0.0.9.x:
38320 - Fix an assert race at exit nodes when resolve requests fail.
38321 - Stop picking unverified dir mirrors--it only leads to misery.
38322 - Patch from Matt Edman to make NT services work better. Service
38323 support is still not compiled into the executable by default.
38324 - Patch from Dmitri Bely so the Tor service runs better under
38325 the win32 SYSTEM account.
38326 - Make tor-resolve actually work (?) on Win32.
38327 - Fix a sign bug when getrlimit claims to have 4+ billion
38328 file descriptors available.
38329 - Stop refusing to start when bandwidthburst == bandwidthrate.
38330 - When create cells have been on the onion queue more than five
38331 seconds, just send back a destroy and take them off the list.
38334 Changes in version 0.0.9.4 - 2005-02-03
38335 o Bugfixes on 0.0.9:
38336 - Fix an assert bug that took down most of our servers: when
38337 a server claims to have 1 GB of bandwidthburst, don't
38339 - Don't crash as badly if we have spawned the max allowed number
38340 of dnsworkers, or we're out of file descriptors.
38341 - Block more file-sharing ports in the default exit policy.
38342 - MaxConn is now automatically set to the hard limit of max
38343 file descriptors we're allowed (ulimit -n), minus a few for
38345 - Give a clearer message when servers need to raise their
38346 ulimit -n when they start running out of file descriptors.
38347 - SGI Compatibility patches from Jan Schaumann.
38348 - Tolerate a corrupt cached directory better.
38349 - When a dirserver hasn't approved your server, list which one.
38350 - Go into soft hibernation after 95% of the bandwidth is used,
38351 not 99%. This is especially important for daily hibernators who
38352 have a small accounting max. Hopefully it will result in fewer
38353 cut connections when the hard hibernation starts.
38354 - Load-balance better when using servers that claim more than
38355 800kB/s of capacity.
38356 - Make NT services work (experimental, only used if compiled in).
38359 Changes in version 0.0.9.3 - 2005-01-21
38360 o Bugfixes on 0.0.9:
38361 - Backport the cpu use fixes from main branch, so busy servers won't
38362 need as much processor time.
38363 - Work better when we go offline and then come back, or when we
38364 run Tor at boot before the network is up. We do this by
38365 optimistically trying to fetch a new directory whenever an
38366 application request comes in and we think we're offline -- the
38367 human is hopefully a good measure of when the network is back.
38368 - Backport some minimal hidserv bugfixes: keep rend circuits open as
38369 long as you keep using them; actually publish hidserv descriptors
38370 shortly after they change, rather than waiting 20-40 minutes.
38371 - Enable Mac startup script by default.
38372 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
38373 - When you update AllowUnverifiedNodes or FirewallPorts via the
38374 controller's setconf feature, we were always appending, never
38376 - When you update HiddenServiceDir via setconf, it was screwing up
38377 the order of reading the lines, making it fail.
38378 - Do not rewrite a cached directory back to the cache; otherwise we
38379 will think it is recent and not fetch a newer one on startup.
38380 - Workaround for webservers that lie about Content-Encoding: Tor
38381 now tries to autodetect compressed directories and compression
38382 itself. This lets us Proxypass dir fetches through apache.
38385 Changes in version 0.0.9.2 - 2005-01-04
38386 o Bugfixes on 0.0.9 (crashes and asserts):
38387 - Fix an assert on startup when the disk is full and you're logging
38389 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
38390 style address, then we'd crash.
38391 - Fix an assert trigger when the running-routers string we get from
38392 a dirserver is broken.
38393 - Make worker threads start and run on win32. Now win32 servers
38395 - Bandaid (not actually fix, but now it doesn't crash) an assert
38396 where the dns worker dies mysteriously and the main Tor process
38397 doesn't remember anything about the address it was resolving.
38399 o Bugfixes on 0.0.9 (Win32):
38400 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
38401 name out of the warning/assert messages.
38402 - Fix a superficial "unhandled error on read" bug on win32.
38403 - The win32 installer no longer requires a click-through for our
38404 license, since our Free Software license grants rights but does not
38406 - Win32: When connecting to a dirserver fails, try another one
38407 immediately. (This was already working for non-win32 Tors.)
38408 - Stop trying to parse $HOME on win32 when hunting for default
38410 - Make tor-resolve.c work on win32 by calling network_init().
38412 o Bugfixes on 0.0.9 (other):
38413 - Make 0.0.9.x build on Solaris again.
38414 - Due to a fencepost error, we were blowing away the \n when reporting
38415 confvalue items in the controller. So asking for multiple config
38416 values at once couldn't work.
38417 - When listing circuits that are pending on an opening OR connection,
38418 if we're an OR we were listing circuits that *end* at us as
38419 being pending on every listener, dns/cpu worker, etc. Stop that.
38420 - Dirservers were failing to create 'running-routers' or 'directory'
38421 strings if we had more than some threshold of routers. Fix them so
38422 they can handle any number of routers.
38423 - Fix a superficial "Duplicate mark for close" bug.
38424 - Stop checking for clock skew for OR connections, even for servers.
38425 - Fix a fencepost error that was chopping off the last letter of any
38426 nickname that is the maximum allowed nickname length.
38427 - Update URLs in log messages so they point to the new website.
38428 - Fix a potential problem in mangling server private keys while
38429 writing to disk (not triggered yet, as far as we know).
38430 - Include the licenses for other free software we include in Tor,
38431 now that we're shipping binary distributions more regularly.
38434 Changes in version 0.0.9.1 - 2004-12-15
38435 o Bugfixes on 0.0.9:
38436 - Make hibernation actually work.
38437 - Make HashedControlPassword config option work.
38438 - When we're reporting event circuit status to a controller,
38439 don't use the stream status code.
38442 Changes in version 0.0.9 - 2004-12-12
38444 - Clean up manpage and torrc.sample file.
38445 - Clean up severities and text of log warnings.
38447 - Make servers trigger an assert when they enter hibernation.
38450 Changes in version 0.0.9rc7 - 2004-12-08
38451 o Bugfixes on 0.0.9rc:
38452 - Fix a stack-trashing crash when an exit node begins hibernating.
38453 - Avoid looking at unallocated memory while considering which
38454 ports we need to build circuits to cover.
38455 - Stop a sigpipe: when an 'end' cell races with eof from the app,
38456 we shouldn't hold-open-until-flush if the eof arrived first.
38457 - Fix a bug with init_cookie_authentication() in the controller.
38458 - When recommending new-format log lines, if the upper bound is
38459 LOG_ERR, leave it implicit.
38461 o Bugfixes on 0.0.8.1:
38462 - Fix a whole slew of memory leaks.
38463 - Fix isspace() and friends so they still make Solaris happy
38464 but also so they don't trigger asserts on win32.
38465 - Fix parse_iso_time on platforms without strptime (eg win32).
38466 - win32: tolerate extra "readable" events better.
38467 - win32: when being multithreaded, leave parent fdarray open.
38468 - Make unit tests work on win32.
38471 Changes in version 0.0.9rc6 - 2004-12-06
38472 o Bugfixes on 0.0.9pre:
38473 - Clean up some more integer underflow opportunities (not exploitable
38475 - While hibernating, hup should not regrow our listeners.
38476 - Send an end to the streams we close when we hibernate, rather
38477 than just chopping them off.
38478 - React to eof immediately on non-open edge connections.
38480 o Bugfixes on 0.0.8.1:
38481 - Calculate timeout for waiting for a connected cell from the time
38482 we sent the begin cell, not from the time the stream started. If
38483 it took a long time to establish the circuit, we would time out
38484 right after sending the begin cell.
38485 - Fix router_compare_addr_to_addr_policy: it was not treating a port
38486 of * as always matching, so we were picking reject *:* nodes as
38487 exit nodes too. Oops.
38490 - New circuit building strategy: keep a list of ports that we've
38491 used in the past 6 hours, and always try to have 2 circuits open
38492 or on the way that will handle each such port. Seed us with port
38493 80 so web users won't complain that Tor is "slow to start up".
38494 - Make kill -USR1 dump more useful stats about circuits.
38495 - When warning about retrying or giving up, print the address, so
38496 the user knows which one it's talking about.
38497 - If you haven't used a clean circuit in an hour, throw it away,
38498 just to be on the safe side. (This means after 6 hours a totally
38499 unused Tor client will have no circuits open.)
38502 Changes in version 0.0.9rc5 - 2004-12-01
38503 o Bugfixes on 0.0.8.1:
38504 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
38505 - Let resolve conns retry/expire also, rather than sticking around
38507 - If we are using select, make sure we stay within FD_SETSIZE.
38509 o Bugfixes on 0.0.9pre:
38510 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
38511 but doesn't seem to be currently; thanks to Ilja van Sprundel for
38513 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
38514 instead. Impose minima and maxima for all *Period options; impose
38515 even tighter maxima for fetching if we are a caching dirserver.
38516 Clip rather than rejecting.
38517 - Fetch cached running-routers from servers that serve it (that is,
38518 authdirservers and servers running 0.0.9rc5-cvs or later.)
38521 - Accept *:706 (silc) in default exit policy.
38522 - Implement new versioning format for post 0.1.
38523 - Support "foo.nickname.exit" addresses, to let Alice request the
38524 address "foo" as viewed by exit node "nickname". Based on a patch
38526 - Make tor --version --version dump the cvs Id of every file.
38529 Changes in version 0.0.9rc4 - 2004-11-28
38530 o Bugfixes on 0.0.8.1:
38531 - Make windows sockets actually non-blocking (oops), and handle
38532 win32 socket errors better.
38534 o Bugfixes on 0.0.9rc1:
38535 - Actually catch the -USR2 signal.
38538 Changes in version 0.0.9rc3 - 2004-11-25
38539 o Bugfixes on 0.0.8.1:
38540 - Flush the log file descriptor after we print "Tor opening log file",
38541 so we don't see those messages days later.
38543 o Bugfixes on 0.0.9rc1:
38544 - Make tor-resolve work again.
38545 - Avoid infinite loop in tor-resolve if tor hangs up on it.
38546 - Fix an assert trigger for clients/servers handling resolves.
38549 Changes in version 0.0.9rc2 - 2004-11-24
38550 o Bugfixes on 0.0.9rc1:
38551 - I broke socks5 support while fixing the eof bug.
38552 - Allow unitless bandwidths and intervals; they default to bytes
38554 - New servers don't start out hibernating; they are active until
38555 they run out of bytes, so they have a better estimate of how
38556 long it takes, and so their operators can know they're working.
38559 Changes in version 0.0.9rc1 - 2004-11-23
38560 o Bugfixes on 0.0.8.1:
38561 - Finally fix a bug that's been plaguing us for a year:
38562 With high load, circuit package window was reaching 0. Whenever
38563 we got a circuit-level sendme, we were reading a lot on each
38564 socket, but only writing out a bit. So we would eventually reach
38565 eof. This would be noticed and acted on even when there were still
38566 bytes sitting in the inbuf.
38567 - When poll() is interrupted, we shouldn't believe the revents values.
38569 o Bugfixes on 0.0.9pre6:
38570 - Fix hibernate bug that caused pre6 to be broken.
38571 - Don't keep rephist info for routers that haven't had activity for
38572 24 hours. (This matters now that clients have keys, since we track
38574 - Never call close_temp_logs while validating log options.
38575 - Fix backslash-escaping on tor.sh.in and torctl.in.
38578 - Implement weekly/monthly/daily accounting: now you specify your
38579 hibernation properties by
38580 AccountingMax N bytes|KB|MB|GB|TB
38581 AccountingStart day|week|month [day] HH:MM
38582 Defaults to "month 1 0:00".
38583 - Let bandwidth and interval config options be specified as 5 bytes,
38584 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
38585 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
38586 get back to normal.)
38587 - If your requested entry or exit node has advertised bandwidth 0,
38589 - Be more greedy about filling up relay cells -- we try reading again
38590 once we've processed the stuff we read, in case enough has arrived
38591 to fill the last cell completely.
38592 - Apply NT service patch from Osamu Fujino. Still needs more work.
38595 Changes in version 0.0.9pre6 - 2004-11-15
38596 o Bugfixes on 0.0.8.1:
38597 - Fix assert failure on malformed socks4a requests.
38598 - Use identity comparison, not nickname comparison, to choose which
38599 half of circuit-ID-space each side gets to use. This is needed
38600 because sometimes we think of a router as a nickname, and sometimes
38601 as a hex ID, and we can't predict what the other side will do.
38602 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
38603 write() call will fail and we handle it there.
38604 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
38605 and smartlist_len, which are two major profiling offenders.
38607 o Bugfixes on 0.0.9pre5:
38608 - Fix a bug in read_all that was corrupting config files on windows.
38609 - When we're raising the max number of open file descriptors to
38610 'unlimited', don't log that we just raised it to '-1'.
38611 - Include event code with events, as required by control-spec.txt.
38612 - Don't give a fingerprint when clients do --list-fingerprint:
38613 it's misleading, because it will never be the same again.
38614 - Stop using strlcpy in tor_strndup, since it was slowing us
38616 - Remove warn on startup about missing cached-directory file.
38617 - Make kill -USR1 work again.
38618 - Hibernate if we start tor during the "wait for wakeup-time" phase
38619 of an accounting interval. Log our hibernation plans better.
38620 - Authoritative dirservers now also cache their directory, so they
38621 have it on start-up.
38624 - Fetch running-routers; cache running-routers; compress
38625 running-routers; serve compressed running-routers.z
38626 - Add NSI installer script contributed by J Doe.
38627 - Commit VC6 and VC7 workspace/project files.
38628 - Commit a tor.spec for making RPM files, with help from jbash.
38629 - Add contrib/torctl.in contributed by Glenn Fink.
38630 - Implement the control-spec's SAVECONF command, to write your
38631 configuration to torrc.
38632 - Get cookie authentication for the controller closer to working.
38633 - Include control-spec.txt in the tarball.
38634 - When set_conf changes our server descriptor, upload a new copy.
38635 But don't upload it too often if there are frequent changes.
38636 - Document authentication config in man page, and document signals
38638 - Clean up confusing parts of man page and torrc.sample.
38639 - Make expand_filename handle ~ and ~username.
38640 - Use autoconf to enable largefile support where necessary. Use
38641 ftello where available, since ftell can fail at 2GB.
38642 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
38643 log more informatively.
38644 - Give a slightly more useful output for "tor -h".
38645 - Refuse application socks connections to port 0.
38646 - Check clock skew for verified servers, but allow unverified
38647 servers and clients to have any clock skew.
38648 - Break DirFetchPostPeriod into:
38649 - DirFetchPeriod for fetching full directory,
38650 - StatusFetchPeriod for fetching running-routers,
38651 - DirPostPeriod for posting server descriptor,
38652 - RendPostPeriod for posting hidden service descriptors.
38653 - Make sure the hidden service descriptors are at a random offset
38654 from each other, to hinder linkability.
38657 Changes in version 0.0.9pre5 - 2004-11-09
38658 o Bugfixes on 0.0.9pre4:
38659 - Fix a seg fault in unit tests (doesn't affect main program).
38660 - Fix an assert bug where a hidden service provider would fail if
38661 the first hop of his rendezvous circuit was down.
38662 - Hidden service operators now correctly handle version 1 style
38663 INTRODUCE1 cells (nobody generates them still, so not a critical
38665 - If do_hup fails, actually notice.
38666 - Handle more errnos from accept() without closing the listener.
38667 Some OpenBSD machines were closing their listeners because
38668 they ran out of file descriptors.
38669 - Send resolve cells to exit routers that are running a new
38670 enough version of the resolve code to work right.
38671 - Better handling of winsock includes on non-MSV win32 compilers.
38672 - Some people had wrapped their tor client/server in a script
38673 that would restart it whenever it died. This did not play well
38674 with our "shut down if your version is obsolete" code. Now people
38675 don't fetch a new directory if their local cached version is
38677 - Make our autogen.sh work on ksh as well as bash.
38680 - Hibernation: New config option "AccountingMaxKB" lets you
38681 set how many KBytes per month you want to allow your server to
38682 consume. Rather than spreading those bytes out evenly over the
38683 month, we instead hibernate for some of the month and pop up
38684 at a deterministic time, work until the bytes are consumed, then
38685 hibernate again. Config option "MonthlyAccountingStart" lets you
38686 specify which day of the month your billing cycle starts on.
38687 - Control interface: a separate program can now talk to your
38688 client/server over a socket, and get/set config options, receive
38689 notifications of circuits and streams starting/finishing/dying,
38690 bandwidth used, etc. The next step is to get some GUIs working.
38691 Let us know if you want to help out. See doc/control-spec.txt .
38692 - Ship a contrib/tor-control.py as an example script to interact
38693 with the control port.
38694 - "tor --hash-password zzyxz" will output a salted password for
38695 use in authenticating to the control interface.
38696 - New log format in config:
38697 "Log minsev[-maxsev] stdout|stderr|syslog" or
38698 "Log minsev[-maxsev] file /var/foo"
38701 - DirPolicy config option, to let people reject incoming addresses
38702 from their dirserver.
38703 - "tor --list-fingerprint" will list your identity key fingerprint
38705 - Add "pass" target for RedirectExit, to make it easier to break
38706 out of a sequence of RedirectExit rules.
38707 - Clients now generate a TLS cert too, in preparation for having
38708 them act more like real nodes.
38709 - Ship src/win32/ in the tarball, so people can use it to build.
38710 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
38712 - New "router-status" line in directory, to better bind each verified
38713 nickname to its identity key.
38714 - Deprecate unofficial config option abbreviations, and abbreviations
38715 not on the command line.
38716 - Add a pure-C tor-resolve implementation.
38717 - Use getrlimit and friends to ensure we can reach MaxConn (currently
38718 1024) file descriptors.
38720 o Code security improvements, inspired by Ilja:
38721 - Replace sprintf with snprintf. (I think they were all safe, but
38723 - Replace strcpy/strncpy with strlcpy in more places.
38724 - Avoid strcat; use snprintf or strlcat instead.
38725 - snprintf wrapper with consistent (though not C99) overflow behavior.
38728 Changes in version 0.0.9pre4 - 2004-10-17
38729 o Bugfixes on 0.0.9pre3:
38730 - If the server doesn't specify an exit policy, use the real default
38731 exit policy, not reject *:*.
38732 - Ignore fascistfirewall when uploading/downloading hidden service
38733 descriptors, since we go through Tor for those; and when using
38734 an HttpProxy, since we assume it can reach them all.
38735 - When looking for an authoritative dirserver, use only the ones
38736 configured at boot. Don't bother looking in the directory.
38737 - The rest of the fix for get_default_conf_file() on older win32.
38738 - Make 'Routerfile' config option obsolete.
38741 - New 'MyFamily nick1,...' config option for a server to
38742 specify other servers that shouldn't be used in the same circuit
38743 with it. Only believed if nick1 also specifies us.
38744 - New 'NodeFamily nick1,nick2,...' config option for a client to
38745 specify nodes that it doesn't want to use in the same circuit.
38746 - New 'Redirectexit pattern address:port' config option for a
38747 server to redirect exit connections, e.g. to a local squid.
38750 Changes in version 0.0.9pre3 - 2004-10-13
38751 o Bugfixes on 0.0.8.1:
38752 - Better torrc example lines for dirbindaddress and orbindaddress.
38753 - Improved bounds checking on parsed ints (e.g. config options and
38754 the ones we find in directories.)
38755 - Better handling of size_t vs int, so we're more robust on 64
38757 - Fix the rest of the bug where a newly started OR would appear
38758 as unverified even after we've added his fingerprint and hupped
38760 - Fix a bug from 0.0.7: when read() failed on a stream, we would
38761 close it without sending back an end. So 'connection refused'
38762 would simply be ignored and the user would get no response.
38764 o Bugfixes on 0.0.9pre2:
38765 - Serving the cached-on-disk directory to people is bad. We now
38766 provide no directory until we've fetched a fresh one.
38767 - Workaround for bug on windows where cached-directories get crlf
38769 - Make get_default_conf_file() work on older windows too.
38770 - If we write a *:* exit policy line in the descriptor, don't write
38771 any more exit policy lines.
38774 - Use only 0.0.9pre1 and later servers for resolve cells.
38775 - Make the dirservers file obsolete.
38776 - Include a dir-signing-key token in directories to tell the
38777 parsing entity which key is being used to sign.
38778 - Remove the built-in bulky default dirservers string.
38779 - New config option "Dirserver %s:%d [fingerprint]", which can be
38780 repeated as many times as needed. If no dirservers specified,
38781 default to moria1,moria2,tor26.
38782 - Make moria2 advertise a dirport of 80, so people behind firewalls
38783 will be able to get a directory.
38784 - Http proxy support
38785 - Dirservers translate requests for http://%s:%d/x to /x
38786 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
38787 be routed through this host.
38788 - Clients ask for /tor/x rather than /x for new enough dirservers.
38789 This way we can one day coexist peacefully with apache.
38790 - Clients specify a "Host: %s%d" http header, to be compatible
38791 with more proxies, and so running squid on an exit node can work.
38794 Changes in version 0.0.8.1 - 2004-10-13
38796 - Fix a seg fault that can be triggered remotely for Tor
38797 clients/servers with an open dirport.
38798 - Fix a rare assert trigger, where routerinfos for entries in
38799 our cpath would expire while we're building the path.
38800 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38801 - Fix a rare seg fault for people running hidden services on
38802 intermittent connections.
38803 - Fix a bug in parsing opt keywords with objects.
38804 - Fix a stale pointer assert bug when a stream detaches and
38806 - Fix a string format vulnerability (probably not exploitable)
38807 in reporting stats locally.
38808 - Fix an assert trigger: sometimes launching circuits can fail
38809 immediately, e.g. because too many circuits have failed recently.
38810 - Fix a compile warning on 64 bit platforms.
38813 Changes in version 0.0.9pre2 - 2004-10-03
38815 - Make fetching a cached directory work for 64-bit platforms too.
38816 - Make zlib.h a required header, not an optional header.
38819 Changes in version 0.0.9pre1 - 2004-10-01
38821 - Stop using separate defaults for no-config-file and
38822 empty-config-file. Now you have to explicitly turn off SocksPort,
38823 if you don't want it open.
38824 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38825 - Improve man page to mention more of the 0.0.8 features.
38826 - Fix a rare seg fault for people running hidden services on
38827 intermittent connections.
38828 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
38830 - Fix more dns related bugs: send back resolve_failed and end cells
38831 more reliably when the resolve fails, rather than closing the
38832 circuit and then trying to send the cell. Also attach dummy resolve
38833 connections to a circuit *before* calling dns_resolve(), to fix
38834 a bug where cached answers would never be sent in RESOLVED cells.
38835 - When we run out of disk space, or other log writing error, don't
38836 crash. Just stop logging to that log and continue.
38837 - We were starting to daemonize before we opened our logs, so if
38838 there were any problems opening logs, we would complain to stderr,
38839 which wouldn't work, and then mysteriously exit.
38840 - Fix a rare bug where sometimes a verified OR would connect to us
38841 before he'd uploaded his descriptor, which would cause us to
38842 assign conn->nickname as though he's unverified. Now we look through
38843 the fingerprint list to see if he's there.
38844 - Fix a rare assert trigger, where routerinfos for entries in
38845 our cpath would expire while we're building the path.
38848 - Clients can ask dirservers for /dir.z to get a compressed version
38849 of the directory. Only works for servers running 0.0.9, of course.
38850 - Make clients cache directories and use them to seed their router
38851 lists at startup. This means clients have a datadir again.
38852 - Configuration infrastructure support for warning on obsolete
38854 - Respond to content-encoding headers by trying to uncompress as
38856 - Reply with a deflated directory when a client asks for "dir.z".
38857 We could use allow-encodings instead, but allow-encodings isn't
38858 specified in HTTP 1.0.
38859 - Raise the max dns workers from 50 to 100.
38860 - Discourage people from setting their dirfetchpostperiod more often
38861 than once per minute.
38862 - Protect dirservers from overzealous descriptor uploading -- wait
38863 10 seconds after directory gets dirty, before regenerating.
38866 Changes in version 0.0.8 - 2004-08-25
38867 o Port it to SunOS 5.9 / Athena
38870 Changes in version 0.0.8rc2 - 2004-08-20
38871 o Make it compile on cygwin again.
38872 o When picking unverified routers, skip those with low uptime and/or
38873 low bandwidth, depending on what properties you care about.
38876 Changes in version 0.0.8rc1 - 2004-08-18
38877 o Changes from 0.0.7.3:
38879 - Fix assert triggers: if the other side returns an address 0.0.0.0,
38880 don't put it into the client dns cache.
38881 - If a begin failed due to exit policy, but we believe the IP address
38882 should have been allowed, switch that router to exitpolicy reject *:*
38883 until we get our next directory.
38885 - Clients choose nodes proportional to advertised bandwidth.
38886 - Avoid using nodes with low uptime as introduction points.
38887 - Handle servers with dynamic IP addresses: don't replace
38888 options->Address with the resolved one at startup, and
38889 detect our address right before we make a routerinfo each time.
38890 - 'FascistFirewall' option to pick dirservers and ORs on specific
38891 ports; plus 'FirewallPorts' config option to tell FascistFirewall
38892 which ports are open. (Defaults to 80,443)
38893 - Be more aggressive about trying to make circuits when the network
38894 has changed (e.g. when you unsuspend your laptop).
38895 - Check for time skew on http headers; report date in response to
38897 - If the entrynode config line has only one node, don't pick it as
38899 - Add strict{entry|exit}nodes config options. If set to 1, then
38900 we refuse to build circuits that don't include the specified entry
38902 - OutboundBindAddress config option, to bind to a specific
38903 IP address for outgoing connect()s.
38904 - End truncated log entries (e.g. directories) with "[truncated]".
38906 o Patches to 0.0.8preX:
38908 - Patches to compile and run on win32 again (maybe)?
38909 - Fix crash when looking for ~/.torrc with no $HOME set.
38910 - Fix a race bug in the unit tests.
38911 - Handle verified/unverified name collisions better when new
38912 routerinfo's arrive in a directory.
38913 - Sometimes routers were getting entered into the stats before
38914 we'd assigned their identity_digest. Oops.
38915 - Only pick and establish intro points after we've gotten a
38918 - AllowUnverifiedNodes config option to let circuits choose no-name
38919 routers in entry,middle,exit,introduction,rendezvous positions.
38920 Allow middle and rendezvous positions by default.
38921 - Add a man page for tor-resolve.
38924 Changes in version 0.0.7.3 - 2004-08-12
38925 o Stop dnsworkers from triggering an assert failure when you
38926 ask them to resolve the host "".
38929 Changes in version 0.0.8pre3 - 2004-08-09
38930 o Changes from 0.0.7.2:
38931 - Allow multiple ORs with same nickname in routerlist -- now when
38932 people give us one identity key for a nickname, then later
38933 another, we don't constantly complain until the first expires.
38934 - Remember used bandwidth (both in and out), and publish 15-minute
38935 snapshots for the past day into our descriptor.
38936 - You can now fetch $DIRURL/running-routers to get just the
38937 running-routers line, not the whole descriptor list. (But
38938 clients don't use this yet.)
38939 - When people mistakenly use Tor as an http proxy, point them
38940 at the tor-doc.html rather than the INSTALL.
38941 - Remove our mostly unused -- and broken -- hex_encode()
38942 function. Use base16_encode() instead. (Thanks to Timo Lindfors
38943 for pointing out this bug.)
38944 - Rotate onion keys every 12 hours, not every 2 hours, so we have
38945 fewer problems with people using the wrong key.
38946 - Change the default exit policy to reject the default edonkey,
38947 kazaa, gnutella ports.
38948 - Add replace_file() to util.[ch] to handle win32's rename().
38950 o Changes from 0.0.8preX:
38951 - Fix two bugs in saving onion keys to disk when rotating, so
38952 hopefully we'll get fewer people using old onion keys.
38953 - Fix an assert error that was making SocksPolicy not work.
38954 - Be willing to expire routers that have an open dirport -- it's
38955 just the authoritative dirservers we want to not forget.
38956 - Reject tor-resolve requests for .onion addresses early, so we
38957 don't build a whole rendezvous circuit and then fail.
38958 - When you're warning a server that he's unverified, don't cry
38959 wolf unpredictably.
38960 - Fix a race condition: don't try to extend onto a connection
38961 that's still handshaking.
38962 - For servers in clique mode, require the conn to be open before
38963 you'll choose it for your path.
38964 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
38965 end relay cell, etc.
38966 - Measure bandwidth capacity over the last 24 hours, not just 12
38967 - Bugfix: authoritative dirservers were making and signing a new
38968 directory for each client, rather than reusing the cached one.
38971 Changes in version 0.0.8pre2 - 2004-08-04
38972 o Changes from 0.0.7.2:
38974 - Check directory signature _before_ you decide whether you're
38975 you're running an obsolete version and should exit.
38976 - Check directory signature _before_ you parse the running-routers
38977 list to decide who's running or verified.
38978 - Bugfixes and features:
38979 - Check return value of fclose while writing to disk, so we don't
38980 end up with broken files when servers run out of disk space.
38981 - Log a warning if the user uses an unsafe socks variant, so people
38982 are more likely to learn about privoxy or socat.
38983 - Dirservers now include RFC1123-style dates in the HTTP headers,
38984 which one day we will use to better detect clock skew.
38986 o Changes from 0.0.8pre1:
38987 - Make it compile without warnings again on win32.
38988 - Log a warning if you're running an unverified server, to let you
38989 know you might want to get it verified.
38990 - Only pick a default nickname if you plan to be a server.
38993 Changes in version 0.0.8pre1 - 2004-07-23
38995 - Made our unit tests compile again on OpenBSD 3.5, and tor
38996 itself compile again on OpenBSD on a sparc64.
38997 - We were neglecting milliseconds when logging on win32, so
38998 everything appeared to happen at the beginning of each second.
39000 o Protocol changes:
39001 - 'Extend' relay cell payloads now include the digest of the
39002 intended next hop's identity key. Now we can verify that we're
39003 extending to the right router, and also extend to routers we
39004 hadn't heard of before.
39007 - Tor nodes can now act as relays (with an advertised ORPort)
39008 without being manually verified by the dirserver operators.
39009 - Uploaded descriptors of unverified routers are now accepted
39010 by the dirservers, and included in the directory.
39011 - Verified routers are listed by nickname in the running-routers
39012 list; unverified routers are listed as "$<fingerprint>".
39013 - We now use hash-of-identity-key in most places rather than
39014 nickname or addr:port, for improved security/flexibility.
39015 - To avoid Sybil attacks, paths still use only verified servers.
39016 But now we have a chance to play around with hybrid approaches.
39017 - Nodes track bandwidth usage to estimate capacity (not used yet).
39018 - ClientOnly option for nodes that never want to become servers.
39019 - Directory caching.
39020 - "AuthoritativeDir 1" option for the official dirservers.
39021 - Now other nodes (clients and servers) will cache the latest
39022 directory they've pulled down.
39023 - They can enable their DirPort to serve it to others.
39024 - Clients will pull down a directory from any node with an open
39025 DirPort, and check the signature/timestamp correctly.
39026 - Authoritative dirservers now fetch directories from other
39027 authdirservers, to stay better synced.
39028 - Running-routers list tells who's down also, along with noting
39029 if they're verified (listed by nickname) or unverified (listed
39031 - Allow dirservers to serve running-router list separately.
39032 This isn't used yet.
39033 - ORs connect-on-demand to other ORs
39034 - If you get an extend cell to an OR you're not connected to,
39035 connect, handshake, and forward the create cell.
39036 - The authoritative dirservers stay connected to everybody,
39037 and everybody stays connected to 0.0.7 servers, but otherwise
39038 clients/servers expire unused connections after 5 minutes.
39039 - When servers get a sigint, they delay 30 seconds (refusing new
39040 connections) then exit. A second sigint causes immediate exit.
39041 - File and name management:
39042 - Look for .torrc if no CONFDIR "torrc" is found.
39043 - If no datadir is defined, then choose, make, and secure ~/.tor
39045 - If torrc not found, exitpolicy reject *:*.
39046 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
39047 - If no nickname is defined, derive default from hostname.
39048 - Rename secret key files, e.g. identity.key -> secret_id_key,
39049 to discourage people from mailing their identity key to tor-ops.
39050 - Refuse to build a circuit before the directory has arrived --
39051 it won't work anyway, since you won't know the right onion keys
39053 - Try other dirservers immediately if the one you try is down. This
39054 should tolerate down dirservers better now.
39055 - Parse tor version numbers so we can do an is-newer-than check
39056 rather than an is-in-the-list check.
39057 - New socks command 'resolve', to let us shim gethostbyname()
39059 - A 'tor_resolve' script to access the socks resolve functionality.
39060 - A new socks-extensions.txt doc file to describe our
39061 interpretation and extensions to the socks protocols.
39062 - Add a ContactInfo option, which gets published in descriptor.
39063 - Publish OR uptime in descriptor (and thus in directory) too.
39064 - Write tor version at the top of each log file
39065 - New docs in the tarball:
39067 - Document that you should proxy your SSL traffic too.
39070 Changes in version 0.0.7.2 - 2004-07-07
39071 o A better fix for the 0.0.0.0 problem, that will hopefully
39072 eliminate the remaining related assertion failures.
39075 Changes in version 0.0.7.1 - 2004-07-04
39076 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
39077 since internally we use 0.0.0.0 to signify "not yet resolved".
39080 Changes in version 0.0.7 - 2004-06-07
39081 o Updated the man page to reflect the new features.
39084 Changes in version 0.0.7rc2 - 2004-06-06
39085 o Changes from 0.0.7rc1:
39086 - Make it build on Win32 again.
39087 o Changes from 0.0.6.2:
39088 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
39092 Changes in version 0.0.7rc1 - 2004-06-02
39094 - On sighup, we were adding another log without removing the first
39095 one. So log messages would get duplicated n times for n sighups.
39096 - Several cases of using a connection after we'd freed it. The
39097 problem was that connections that are pending resolve are in both
39098 the pending_resolve tree, and also the circuit's resolving_streams
39099 list. When you want to remove one, you must remove it from both.
39100 - Fix a double-mark-for-close where an end cell arrived for a
39101 resolving stream, and then the resolve failed.
39102 - Check directory signatures based on name of signer, not on whom
39103 we got the directory from. This will let us cache directories more
39106 - Crank up some of our constants to handle more users.
39109 Changes in version 0.0.7pre1 - 2004-06-02
39110 o Fixes for crashes and other obnoxious bugs:
39111 - Fix an epipe bug: sometimes when directory connections failed
39112 to connect, we would give them a chance to flush before closing
39114 - When we detached from a circuit because of resolvefailed, we
39115 would immediately try the same circuit twice more, and then
39116 give up on the resolve thinking we'd tried three different
39118 - Limit the number of intro circuits we'll attempt to build for a
39119 hidden service per 15-minute period.
39120 - Check recommended-software string *early*, before actually parsing
39121 the directory. Thus we can detect an obsolete version and exit,
39122 even if the new directory format doesn't parse.
39123 o Fixes for security bugs:
39124 - Remember which nodes are dirservers when you startup, and if a
39125 random OR enables his dirport, don't automatically assume he's
39126 a trusted dirserver.
39128 - Directory connections were asking the wrong poll socket to
39129 start writing, and not asking themselves to start writing.
39130 - When we detached from a circuit because we sent a begin but
39131 didn't get a connected, we would use it again the first time;
39132 but after that we would correctly switch to a different one.
39133 - Stop warning when the first onion decrypt attempt fails; they
39134 will sometimes legitimately fail now that we rotate keys.
39135 - Override unaligned-access-ok check when $host_cpu is ia64 or
39136 arm. Apparently they allow it but the kernel whines.
39137 - Dirservers try to reconnect periodically too, in case connections
39139 - Fix some memory leaks in directory servers.
39140 - Allow backslash in Win32 filenames.
39141 - Made Tor build complain-free on FreeBSD, hopefully without
39142 breaking other BSD builds. We'll see.
39144 - Doxygen markup on all functions and global variables.
39145 - Make directory functions update routerlist, not replace it. So
39146 now directory disagreements are not so critical a problem.
39147 - Remove the upper limit on number of descriptors in a dirserver's
39148 directory (not that we were anywhere close).
39149 - Allow multiple logfiles at different severity ranges.
39150 - Allow *BindAddress to specify ":port" rather than setting *Port
39151 separately. Allow multiple instances of each BindAddress config
39152 option, so you can bind to multiple interfaces if you want.
39153 - Allow multiple exit policy lines, which are processed in order.
39154 Now we don't need that huge line with all the commas in it.
39155 - Enable accept/reject policies on SOCKS connections, so you can bind
39156 to 0.0.0.0 but still control who can use your OP.
39159 Changes in version 0.0.6.2 - 2004-05-16
39160 o Our integrity-checking digest was checking only the most recent cell,
39161 not the previous cells like we'd thought.
39162 Thanks to Stefan Mark for finding the flaw!
39165 Changes in version 0.0.6.1 - 2004-05-06
39166 o Fix two bugs in our AES counter-mode implementation (this affected
39167 onion-level stream encryption, but not TLS-level). It turns
39168 out we were doing something much more akin to a 16-character
39169 polyalphabetic cipher. Oops.
39170 Thanks to Stefan Mark for finding the flaw!
39171 o Retire moria3 as a directory server, and add tor26 as a directory
39175 Changes in version 0.0.6 - 2004-05-02
39176 [version bump only]
39179 Changes in version 0.0.6rc4 - 2004-05-01
39180 o Update the built-in dirservers list to use the new directory format
39181 o Fix a rare seg fault: if a node offering a hidden service attempts
39182 to build a circuit to Alice's rendezvous point and fails before it
39183 reaches the last hop, it retries with a different circuit, but
39185 o Handle windows socket errors correctly.
39188 Changes in version 0.0.6rc3 - 2004-04-28
39189 o Don't expire non-general excess circuits (if we had enough
39190 circuits open, we were expiring rendezvous circuits -- even
39191 when they had a stream attached. oops.)
39192 o Fetch randomness from /dev/urandom better (not via fopen/fread)
39193 o Better debugging for tls errors
39194 o Some versions of openssl have an SSL_pending function that erroneously
39195 returns bytes when there is a non-application record pending.
39196 o Set Content-Type on the directory and hidserv descriptor.
39197 o Remove IVs from cipher code, since AES-ctr has none.
39198 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
39199 o We were using an array of length zero in a few places.
39200 o win32's gethostbyname can't resolve an IP to an IP.
39201 o win32's close can't close a socket.
39204 Changes in version 0.0.6rc2 - 2004-04-26
39205 o Fix a bug where we were closing tls connections intermittently.
39206 It turns out openssl keeps its errors around -- so if an error
39207 happens, and you don't ask about it, and then another openssl
39208 operation happens and succeeds, and you ask if there was an error,
39209 it tells you about the first error. Fun fun.
39210 o Fix a bug that's been lurking since 27 may 03 (!)
39211 When passing back a destroy cell, we would use the wrong circ id.
39212 'Mostly harmless', but still worth fixing.
39213 o Since we don't support truncateds much, don't bother sending them;
39214 just close the circ.
39215 o check for <machine/limits.h> so we build on NetBSD again (I hope).
39216 o don't crash if a conn that sent a begin has suddenly lost its circuit
39217 (this was quite rare).
39220 Changes in version 0.0.6rc1 - 2004-04-25
39221 o We now rotate link (tls context) keys and onion keys.
39222 o CREATE cells now include oaep padding, so you can tell
39223 if you decrypted them correctly.
39224 o Add bandwidthburst to server descriptor.
39225 o Directories now say which dirserver signed them.
39226 o Use a tor_assert macro that logs failed assertions too.
39229 Changes in version 0.0.6pre5 - 2004-04-18
39230 o changes from 0.0.6pre4:
39231 - make tor build on broken freebsd 5.2 installs
39232 - fix a failed assert when you try an intro point, get a nack, and try
39233 a second one and it works.
39234 - when alice uses a port that the hidden service doesn't accept,
39235 it now sends back an end cell (denied by exit policy). otherwise
39236 alice would just have to wait to time out.
39237 - fix another rare bug: when we had tried all the intro
39238 points for a hidden service, we fetched the descriptor
39239 again, but we left our introcirc thinking it had already
39240 sent an intro, so it kept waiting for a response...
39241 - bugfix: when you sleep your hidden-service laptop, as soon
39242 as it wakes up it tries to upload a service descriptor, but
39243 socketpair fails for some reason (localhost not up yet?).
39244 now we simply give up on that upload, and we'll try again later.
39245 i'd still like to find the bug though.
39246 - if an intro circ waiting for an ack dies before getting one, then
39248 - we were reusing stale service descriptors and refetching usable
39252 Changes in version 0.0.6pre4 - 2004-04-14
39253 o changes from 0.0.6pre3:
39254 - when bob fails to connect to the rendezvous point, and his
39255 circ didn't fail because of the rendezvous point itself, then
39256 he retries a couple of times
39257 - we expire introduction and rendezvous circs more thoroughly
39258 (sometimes they were hanging around forever)
39259 - we expire unattached rendezvous streams that have been around
39260 too long (they were sticking around forever).
39261 - fix a measly fencepost error that was crashing everybody with
39265 Changes in version 0.0.6pre3 - 2004-04-14
39266 o changes from 0.0.6pre2:
39267 - make hup work again
39268 - fix some memory leaks for dirservers
39269 - allow more skew in rendezvous descriptor timestamps, to help
39270 handle people like blanu who don't know what time it is
39271 - normal circs are 3 hops, but some rend/intro circs are 4, if
39272 the initiator doesn't get to choose the last hop
39273 - send acks for introductions, so alice can know whether to try
39275 - bob publishes intro points more correctly
39276 o changes from 0.0.5:
39277 - fix an assert trigger that's been plaguing us since the days
39278 of 0.0.2prexx (thanks weasel!)
39279 - retry stream correctly when we fail to connect because of
39280 exit-policy-reject (should try another) or can't-resolve-address
39281 (also should try another, because dns on random internet servers
39283 - when we hup a dirserver and we've *removed* a server from the
39284 approved-routers list, now we remove that server from the
39285 in-memory directories too
39288 Changes in version 0.0.6pre2 - 2004-04-08
39289 o We fixed our base32 implementation. Now it works on all architectures.
39292 Changes in version 0.0.6pre1 - 2004-04-08
39294 - Hidden services and rendezvous points are implemented. Go to
39295 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
39296 hidden services. (This only works via a socks4a proxy such as
39297 Privoxy, and currently it's quite slow.)
39300 Changes in version 0.0.5 - 2004-03-30
39301 [version bump only]
39304 Changes in version 0.0.5rc3 - 2004-03-29
39305 o Install torrc as torrc.sample -- we no longer clobber your
39307 o Re-enable recommendedversion checking (we broke it in rc2, oops)
39308 o Add in a 'notice' log level for things the operator should hear
39309 but that aren't warnings
39312 Changes in version 0.0.5rc2 - 2004-03-29
39313 o Hold socks connection open until reply is flushed (if possible)
39314 o Make exit nodes resolve IPs to IPs immediately, rather than asking
39315 the dns farm to do it.
39316 o Fix c99 aliasing warnings in rephist.c
39317 o Don't include server descriptors that are older than 24 hours in the
39319 o Give socks 'reject' replies their whole 15s to attempt to flush,
39320 rather than seeing the 60s timeout and assuming the flush had failed.
39321 o Clean automake droppings from the cvs repository
39324 Changes in version 0.0.5rc1 - 2004-03-28
39325 o Fix mangled-state bug in directory fetching (was causing sigpipes).
39326 o Only build circuits after we've fetched the directory: clients were
39327 using only the directory servers before they'd fetched a directory.
39328 This also means longer startup time; so it goes.
39329 o Fix an assert trigger where an OP would fail to handshake, and we'd
39330 expect it to have a nickname.
39331 o Work around a tsocks bug: do a socks reject when AP connection dies
39332 early, else tsocks goes into an infinite loop.
39335 Changes in version 0.0.4 - 2004-03-26
39336 o When connecting to a dirserver or OR and the network is down,
39340 Changes in version 0.0.3 - 2004-03-26
39341 o Warn and fail if server chose a nickname with illegal characters
39342 o Port to Solaris and Sparc:
39343 - include missing header fcntl.h
39344 - have autoconf find -lsocket -lnsl automatically
39345 - deal with hardware word alignment
39346 - make uname() work (solaris has a different return convention)
39347 - switch from using signal() to sigaction()
39348 o Preliminary work on reputation system:
39349 - Keep statistics on success/fail of connect attempts; they're published
39350 by kill -USR1 currently.
39351 - Add a RunTesting option to try to learn link state by creating test
39352 circuits, even when SocksPort is off.
39353 - Remove unused open circuits when there are too many.
39356 Changes in version 0.0.2 - 2004-03-19
39357 - Include strlcpy and strlcat for safer string ops
39358 - define INADDR_NONE so we compile (but still not run) on solaris
39361 Changes in version 0.0.2pre27 - 2004-03-14
39363 - Allow internal tor networks (we were rejecting internal IPs,
39364 now we allow them if they're set explicitly).
39365 - And fix a few endian issues.
39368 Changes in version 0.0.2pre26 - 2004-03-14
39370 - If a stream times out after 15s without a connected cell, don't
39371 try that circuit again: try a new one.
39372 - Retry streams at most 4 times. Then give up.
39373 - When a dirserver gets a descriptor from an unknown router, it
39374 logs its fingerprint (so the dirserver operator can choose to
39375 accept it even without mail from the server operator).
39376 - Inform unapproved servers when we reject their descriptors.
39377 - Make tor build on Windows again. It works as a client, who knows
39379 - Clearer instructions in the torrc for how to set up a server.
39380 - Be more efficient about reading fd's when our global token bucket
39381 (used for rate limiting) becomes empty.
39383 - Stop asserting that computers always go forward in time. It's
39385 - When we sent a cell (e.g. destroy) and then marked an OR connection
39386 expired, we might close it before finishing a flush if the other
39387 side isn't reading right then.
39388 - Don't allow dirservers to start if they haven't defined
39389 RecommendedVersions
39390 - We were caching transient dns failures. Oops.
39391 - Prevent servers from publishing an internal IP as their address.
39392 - Address a strcat vulnerability in circuit.c
39395 Changes in version 0.0.2pre25 - 2004-03-04
39397 - Put the OR's IP in its router descriptor, not its fqdn. That way
39398 we'll stop being stalled by gethostbyname for nodes with flaky dns,
39401 - If the user typed in an address that didn't resolve, the server
39405 Changes in version 0.0.2pre24 - 2004-03-03
39407 - Fix an assertion failure in dns.c, where we were trying to dequeue
39408 a pending dns resolve even if it wasn't pending
39409 - Fix a spurious socks5 warning about still trying to write after the
39410 connection is finished.
39411 - Hold certain marked_for_close connections open until they're finished
39412 flushing, rather than losing bytes by closing them too early.
39413 - Correctly report the reason for ending a stream
39414 - Remove some duplicate calls to connection_mark_for_close
39415 - Put switch_id and start_daemon earlier in the boot sequence, so it
39416 will actually try to chdir() to options.DataDirectory
39417 - Make 'make test' exit(1) if a test fails; fix some unit tests
39418 - Make tor fail when you use a config option it doesn't know about,
39419 rather than warn and continue.
39420 - Make --version work
39421 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
39424 Changes in version 0.0.2pre23 - 2004-02-29
39426 - Print a statement when the first circ is finished, so the user
39427 knows it's working.
39428 - If a relay cell is unrecognized at the end of the circuit,
39429 send back a destroy. (So attacks to mutate cells are more
39431 - New config option 'excludenodes' to avoid certain nodes for circuits.
39432 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
39433 so you can collect coredumps there.
39435 - Fix a bug in tls flushing where sometimes data got wedged and
39436 didn't flush until more data got sent. Hopefully this bug was
39437 a big factor in the random delays we were seeing.
39438 - Make 'connected' cells include the resolved IP, so the client
39439 dns cache actually gets populated.
39440 - Disallow changing from ORPort=0 to ORPort>0 on hup.
39441 - When we time-out on a stream and detach from the circuit, send an
39442 end cell down it first.
39443 - Only warn about an unknown router (in exitnodes, entrynodes,
39444 excludenodes) after we've fetched a directory.
39447 Changes in version 0.0.2pre22 - 2004-02-26
39449 - Servers publish less revealing uname information in descriptors.
39450 - More memory tracking and assertions, to crash more usefully when
39452 - If the default torrc isn't there, just use some default defaults.
39453 Plus provide an internal dirservers file if they don't have one.
39454 - When the user tries to use Tor as an http proxy, give them an http
39455 501 failure explaining that we're a socks proxy.
39456 - Dump a new router.desc on hup, to help confused people who change
39457 their exit policies and then wonder why router.desc doesn't reflect
39459 - Clean up the generic tor.sh init script that we ship with.
39461 - If the exit stream is pending on the resolve, and a destroy arrives,
39462 then the stream wasn't getting removed from the pending list. I
39463 think this was the one causing recent server crashes.
39464 - Use a more robust poll on OSX 10.3, since their poll is flaky.
39465 - When it couldn't resolve any dirservers, it was useless from then on.
39466 Now it reloads the RouterFile (or default dirservers) if it has no
39468 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
39469 many users don't even *have* a /usr/local/sbin/.
39472 Changes in version 0.0.2pre21 - 2004-02-18
39474 - There's a ChangeLog file that actually reflects the changelog.
39475 - There's a 'torify' wrapper script, with an accompanying
39476 tor-tsocks.conf, that simplifies the process of using tsocks for
39477 tor. It even has a man page.
39478 - The tor binary gets installed to sbin rather than bin now.
39479 - Retry streams where the connected cell hasn't arrived in 15 seconds
39480 - Clean up exit policy handling -- get the default out of the torrc,
39481 so we can update it without forcing each server operator to fix
39483 - Allow imaps and pop3s in default exit policy
39485 - Prevent picking middleman nodes as the last node in the circuit
39488 Changes in version 0.0.2pre20 - 2004-01-30
39490 - We now have a deb package, and it's in debian unstable. Go to
39491 it, apt-getters. :)
39492 - I've split the TotalBandwidth option into BandwidthRate (how many
39493 bytes per second you want to allow, long-term) and
39494 BandwidthBurst (how many bytes you will allow at once before the cap
39495 kicks in). This better token bucket approach lets you, say, set
39496 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
39497 performance while not exceeding your monthly bandwidth quota.
39498 - Push out a tls record's worth of data once you've got it, rather
39499 than waiting until you've read everything waiting to be read. This
39500 may improve performance by pipelining better. We'll see.
39501 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
39502 from failed circuits (if they haven't been connected yet) and attach
39504 - Expire old streams that haven't managed to connect. Some day we'll
39505 have them reattach to new circuits instead.
39508 - Fix several memory leaks that were causing servers to become bloated
39510 - Fix a few very rare assert triggers. A few more remain.
39511 - Setuid to User _before_ complaining about running as root.
39514 Changes in version 0.0.2pre19 - 2004-01-07
39516 - Fix deadlock condition in dns farm. We were telling a child to die by
39517 closing the parent's file descriptor to him. But newer children were
39518 inheriting the open file descriptor from the parent, and since they
39519 weren't closing it, the socket never closed, so the child never read
39520 eof, so he never knew to exit. Similarly, dns workers were holding
39521 open other sockets, leading to all sorts of chaos.
39522 - New cleaner daemon() code for forking and backgrounding.
39523 - If you log to a file, it now prints an entry at the top of the
39524 logfile so you know it's working.
39525 - The onionskin challenge length was 30 bytes longer than necessary.
39526 - Started to patch up the spec so it's not quite so out of date.
39529 Changes in version 0.0.2pre18 - 2004-01-02
39531 - Fix endian issues with the 'integrity' field in the relay header.
39532 - Fix a potential bug where connections in state
39533 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
39536 Changes in version 0.0.2pre17 - 2003-12-30
39538 - Made --debuglogfile (or any second log file, actually) work.
39539 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
39540 adversary could force us into an infinite loop.
39543 - Each onionskin handshake now includes a hash of the computed key,
39544 to prove the server's identity and help perfect forward secrecy.
39545 - Changed cell size from 256 to 512 bytes (working toward compatibility
39547 - Changed cell length to 2 bytes, and moved it to the relay header.
39548 - Implemented end-to-end integrity checking for the payloads of
39550 - Separated streamid from 'recognized' (otherwise circuits will get
39551 messed up when we try to have streams exit from the middle). We
39552 use the integrity-checking to confirm that a cell is addressed to
39554 - Randomize the initial circid and streamid values, so an adversary who
39555 breaks into a node can't learn how many circuits or streams have
39559 Changes in version 0.0.2pre16 - 2003-12-14
39561 - Fixed a bug that made HUP trigger an assert
39562 - Fixed a bug where a circuit that immediately failed wasn't being
39563 counted as a failed circuit in counting retries.
39566 - Now we close the circuit when we get a truncated cell: otherwise we're
39567 open to an anonymity attack where a bad node in the path truncates
39568 the circuit and then we open streams at him.
39569 - Add port ranges to exit policies
39570 - Add a conservative default exit policy
39571 - Warn if you're running tor as root
39572 - on HUP, retry OR connections and close/rebind listeners
39573 - options.EntryNodes: try these nodes first when picking the first node
39574 - options.ExitNodes: if your best choices happen to include any of
39575 your preferred exit nodes, you choose among just those preferred
39577 - options.ExcludedNodes: nodes that are never picked in path building
39580 Changes in version 0.0.2pre15 - 2003-12-03
39581 o Robustness and bugfixes:
39582 - Sometimes clients would cache incorrect DNS resolves, which would
39583 really screw things up.
39584 - An OP that goes offline would slowly leak all its sockets and stop
39586 - A wide variety of bugfixes in exit node selection, exit policy
39587 handling, and processing pending streams when a new circuit is
39589 - Pick nodes for a path only from those the directory says are up
39590 - Choose randomly from all running dirservers, not always the first one
39591 - Increase allowed http header size for directory fetch.
39592 - Stop writing to stderr (if we're daemonized it will be closed).
39593 - Enable -g always, so cores will be more useful to me.
39594 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
39597 - Wrote a man page. It lists commonly used options.
39600 - Change default loglevel to warn.
39601 - Make PidFile default to null rather than littering in your CWD.
39602 - OnionRouter config option is now obsolete. Instead it just checks
39604 - Moved to a single unified torrc file for both clients and servers.
39607 Changes in version 0.0.2pre14 - 2003-11-29
39608 o Robustness and bugfixes:
39609 - Force the admin to make the DataDirectory himself
39610 - to get ownership/permissions right
39611 - so clients no longer make a DataDirectory and then never use it
39612 - fix bug where a client who was offline for 45 minutes would never
39613 pull down a directory again
39614 - fix (or at least hide really well) the dns assert bug that was
39615 causing server crashes
39616 - warnings and improved robustness wrt clockskew for certs
39617 - use the native daemon(3) to daemonize, when available
39618 - exit if bind() fails
39619 - exit if neither socksport nor orport is defined
39620 - include our own tor_timegm (Win32 doesn't have its own)
39621 - bugfix for win32 with lots of connections
39622 - fix minor bias in PRNG
39623 - make dirserver more robust to corrupt cached directory
39626 - Wrote the design document (woo)
39628 o Circuit building and exit policies:
39629 - Circuits no longer try to use nodes that the directory has told them
39631 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
39632 bitcounts (18.0.0.0/8).
39633 - Make AP connections standby for a circuit if no suitable circuit
39634 exists, rather than failing
39635 - Circuits choose exit node based on addr/port, exit policies, and
39636 which AP connections are standing by
39637 - Bump min pathlen from 2 to 3
39638 - Relay end cells have a payload to describe why the stream ended.
39639 - If the stream failed because of exit policy, try again with a new
39641 - Clients have a dns cache to remember resolved addresses.
39642 - Notice more quickly when we have no working circuits
39645 - APPort is now called SocksPort
39646 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
39648 - RecommendedVersions is now a config variable rather than
39649 hardcoded (for dirservers)
39650 - Reloads config on HUP
39651 - Usage info on -h or --help
39652 - If you set User and Group config vars, it'll setu/gid to them.
39655 Changes in version 0.0.2pre13 - 2003-10-19
39656 o General stability:
39657 - SSL_write no longer fails when it returns WANTWRITE and the number
39658 of bytes in the buf has changed by the next SSL_write call.
39659 - Fix segfault fetching directory when network is down
39660 - Fix a variety of minor memory leaks
39661 - Dirservers reload the fingerprints file on HUP, so I don't have
39662 to take down the network when I approve a new router
39663 - Default server config file has explicit Address line to specify fqdn
39666 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
39667 - Make listener connections not ever alloc bufs
39669 o Autoconf improvements:
39670 - don't clobber an external CFLAGS in ./configure
39671 - Make install now works
39672 - create var/lib/tor on make install
39673 - autocreate a tor.sh initscript to help distribs
39674 - autocreate the torrc and sample-server-torrc with correct paths
39676 o Log files and Daemonizing now work:
39677 - If --DebugLogFile is specified, log to it at -l debug
39678 - If --LogFile is specified, use it instead of commandline
39679 - If --RunAsDaemon is set, tor forks and backgrounds on startup